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    • 专利摘要:
    video device for processing a three-dimensional video signal [3d], method for processing a three-dimensional video signal [3d], method for providing a three-dimensional video signal [3d] for transfer to a video device 3d video, three-dimensional video signal [3d] video signal for transferring 3d video data to a 3d video device and computer program product for processing a three-dimensional video signal [3d] a three-dimensional video signal [3d] is rendered in video device (50). the device has generating means (52) for generating an output signal for transferring the video data via a high speed digitized interface such as hdmi to a 3d display, which selectively generates a 3d display signal for the display. of 3d video data in a 3d display operating in a 3d mode, a 2d display signal for displaying 2d video data on the 3d display operating in a 2d mode, or a pseudo 3d display signal by including the 2d video data on the output signal for displaying the 2d video data on the display on the 3d display operating in 3d mode. processing means (53) detects a request to display 2d video data on the 3d display operates in 3d mode, and, in response to the detection, the generating means is assembled to generate the pseudo 2d display signal for maintaining 3d mode of the 3d display.
    公开号:BR112012001606B1
    申请号:R112012001606-7
    申请日:2010-07-21
    公开日:2021-07-13
    发明作者:Philip Steven Newton；Wiebe De Haan；Johan Cornelis Talstra；Hendrik Frank Moll；Wilhelmus Hendrikus Alfonsus Bruls
    申请人:Koninklijke Philips N. V.；
    IPC主号:
    专利说明:

    FIELD OF THE INVENTION
    [001] The invention relates to a video device for processing a three-dimensional video signal [3D], the device comprising receiving means for receiving the 3D video signal and retrieving the 3D video data, and generating means to generate an output signal for transferring the video data via a high speed digital interface to a 3D display, the generating means being arranged for generating in a 3D mode, as the output signal, a 3D display signal for displaying the 3D video data on the 3D display operating in a 3D mode, and generating in a 2D mode, as the output signal, a 2D display signal for displaying 2D video data on the 3D display operating in a 2D mode .
    [002] The invention further relates to a method for processing a 3D video signal, a method for providing a 3D video signal, a signal, a record carrier and a computer program product.
    [003] The invention relates to the field of selectively obtaining 3D video data and 2D video data in a 3D display device. HISTORY OF THE INVENTION
    Devices for generating two-dimensional (2D) video data are known, for example video servers, broadcasting equipment or authoring devices. Current extended 3D devices are being proposed for providing three-dimensional (3D) image data. Video devices are also being proposed for processing 3D video data displays, such as optical disc players (eg Blu-ray Disc; BD) or set top boxes that transmit the signals from digital video received. The 3D video device must be coupled to a 3D display device such as a TV or monitor. Video data is transferred from the source device via a suitable interface, preferably a high-speed digital interface such as HDMI.
    [005] In addition to 3D content, such as 3D movies or TV broadcasts, other auxiliary 2D video data may be displayed, for example, a menu, news or other advertisements. Furthermore, in practice the user can select 3D video material or 2D video material as he wishes from various sources. Also, the user can apply an adjustment to force the display into a 2D mode, even when 3D video material is available.
    [006] The document W02009/077929 describes the approaches that can be taken to transition between 2D and 3D. A 3D video signal has video information and associated playback information, the video information and associated playback information being organized according to a playback format. Video information comprises a primary stream of video for 2D display, and an additional stream of information for enabling 3D display. The associated playback information comprises display information indicating the possible types of displays. Display information is processed at the receiver to determine that both 2D display and 3D display are possible. A playback mode is established which determines whether video information should be displayed in 2D mode or 3D mode.
    [007] WO 03/053071 describes a 3D display device. The device can be switched between a 2D display mode and a 3D display mode (auto-stereoscopic) . The device can receive a 2D video signal and be operative to provide a full resolution 2D image. In a second mode of operation, the device receives a 3D video signal and detects the presence of a pair of 3D images. In addition, the device detects the presence of an authorization, and if present, displays the pair of 3D images. However, if the authorization key does not exist, the equipment provides a third mode of operation, in which an image of the (reduced resolution) pair of 3D images is shown to both eyes, so that a 2D image can be seen. SUMMARY OF THE INVENTION
    [008] An issue of WO2009/077929 is that transitions between 3D and 2D playback that can occur require the display device to change the video format and frequency. For example, in 3D mode a stereoscopic display alternates the left and right video in time, to allow correct synchronization of the L and R video frames on an HDMI interface with the timing on the display. Synchronization requires signaling in H- and/or V sync corresponding to the start of a left and/or right frame. This signaling on the HDMI interface makes the display readjust when going from 3D to 2D and vice versa. These readjustments take time and can be very upsetting for the viewer.
    [009] It is an objective of the invention to provide a system for the transition between 3D and 2D in a more convenient way. The invention is defined in the appended claims.
    [010] For this, according to a first aspect of the invention, a device for processing a 3D video signal is provided according to claim 1.
    [011] For that purpose, according to another aspect of the invention, a method of processing the 3D video signal is provided in accordance with claim 5.
    [012] To that end, according to another aspect of the invention, a method for providing 3D video signal for transfer to a 3D video device as defined above is provided as defined in claim 6.
    [013] For that purpose, according to another aspect of the invention, a 3D video signal for transferring 3D video data to a 3D video device as defined above is provided in accordance with claim 12.
    [014] The measurements have the following effect. When a transition from 3D mode to 2D video display is initiated, it is determined whether the output signal is currently in 3D mode. If so, the display will also be operating in 3D mode, whose display mode is maintained by generating the pseudo 2D display signal, that is, an output signal in the format of a 3D signal, but containing only 2D video information . The display device continues to receive the display signal in the form of a 3D signal and therefore does not return to 2D mode or resynchronize. Advantageously, the actual information shown to the user appears to be 2D, due to the lack of 3D information. For example, in a stereo video signal, ie based on 3D in a left and right view, both views will have the same content. Therefore, the display of these views appears to be 2D to the viewer.
    [015] The invention is also based on the following recognition. As consumers get used to seeing in 3D, there will be a need for a transition between 2D and 3D and between 3D and 2D. Of course, the user expects the presentation to change; however, this transition should be non-invasive, and not cause blackboards or other video problems that interfere with the movie experience. When transitioning from 3D to 2D, severe delays and problems relating to the reconfiguration of the player, interface signaling and display can occur. Thus, prior to the invention, it was virtually impossible to smoothly switch from 3D to 2D and back again during movie playback. To overcome these problems, it is proposed that if the user or the system initiates a change between 3D mode and 2D mode, eg during 3D mode playback of a movie, that the display mode does not change, but that is forcibly maintained. Hence the proposed pseudo 2D signal includes 2D video data in 3D video signal format. As a result, the movie's presentation does not change smoothly from 3D to 2D and vice versa, even though the display remains operational in 3D mode. For example, this is achieved through a player device, which generates the display signal, recognizing the situation and reacting differently to mode changes during 3D playback than when playback is stopped.
    [016] In one embodiment, the generating means is arranged to, when transitioning between 3D mode and pseudo 2D mode, apply a 3D offset to the 2D video data to change the amount of 3D information. The effect is that the 2D data gets a 3D effect dependent on the deviation. Advantageously, applying an offset, eg a predetermined disparity or depth, does not require a lot of calculation power.
    [017] In one embodiment, the processing means is arranged to, in pseudo 2D mode, combine graphical data and video data by positioning the graphical data in the depth direction in front of the 2D video data by applying an offset to the graphical data to the generation of a left view and a right view. Advantageously the graphic data is now opposite the 2D video data and will not interfere with the video data.
    [018] In one embodiment, the receiving means is arranged to retrieve, from the 3D video signal, a change indicator, the change indicator being indicative of a 2D mode to be selected, and the processing means is arranged to, upon detecting said request to display the 2D video data, setting up the generating means for generating the display signal in dependence on the shift indicator for both 2D mode and 2D pseudo mode. In particular, the 3D video signal including the change indicator can be retrieved in a record holder. The effect is that the originator of the 3D video signal has the opportunity to select the respective 2D mode which is activated when the user requests the 2D view. Advantageously, the originator can block or allow the pseudo 2D display mode. BRIEF DESCRIPTION OF THE DRAWINGS
    [019] These and other aspects of the invention will become more apparent and elucidated with reference to the embodiments described by way of example in the following description and with reference to the accompanying drawings, where
    [020] Figure 1 shows a system for displaying 3D image data,
    [021] Figure 2 shows a decoder model of a 3D player,
    [022] Figure 3 shows the 2D pseudo mode control,
    [023] Figure 4 shows the 3D playback control when in 2D pseudo mode,
    [024] Figure 5A shows a 3D display signal,
    [025] The normal 2D Figure, 5B shows a display signal for
    [026] Figure 5C pseudo playback 2D shows a display signal for
    [027] Figure 6A shows the application of a 3D offset,
    [028] Figure 6B shows the application of a 3D dual offset,
    [029] Figure 6C shows how to avoid cutting edge when applying offset,
    [030] Figure 7 shows a table of flow numbers,
    [031] Figure 8 shows a stream inlet,
    [032] Figure 9 shows a table for defining the type in the stream input, and
    [033] Figure 10 shows the syntax of stream attributes.
    [034] In the Figures, the elements that correspond to the elements already described have the same reference numbers. DETAILED DESCRIPTION OF ACHIEVEMENTS
    [035] Any "examples" and "modalities" of the description that do not fall within the scope of the claims do not form part of the invention and are provided for illustrative purposes only. Note that the present invention can be used for any type of 3D display that has a depth range. It is assumed that video data for 3D displays is available as electronic data, usually digital. The present invention relates to such image data and manipulates the image data in the digital domain.
    [036] There are many different ways in which 3D images can be formatted and transferred, called the 3D video format. Some formats rely on using a 2D channel to also carry stereo information. For example, the left and right views can interlace, or they can be tiled and over or under. These methods sacrifice the resolution of transporting stereo information.
    [037] A different 3D format is based on two views using a 2D image and another depth image, the so-called depth map, which takes information about the depth of objects in the 2D image. The format called image + depth is different, as it is a combination of a 2D image with a so called "depth", or disparity map. This is a gray scale image, where the gray scale value of a pixel indicates the amount of disparity (or depth in the case of a depth map) for the corresponding pixel in the associated 2D image. The display device uses the disparity, depth or parallax map to calculate the other views, taking the 2D image as input. This can be done in a number of ways, the simplest form being a matter of shifting pixels left or right, dependent on the disparity value associated with those pixels. The document entitled "Depth Image Based Presentation, Compression and Broadcast of a New Approach to 3D TV" by Christoph Fehn gives an excellent overview of the technology (see http://iphome.hhi.de/fehn/Publications/fehn_E! 2004.pdf).
    [038] Figure 1 shows a system for displaying three-dimensional (3D) image data, such as video, graphic or other visual information. A 3D source device 40 transfers a 3D video signal 41 to a video device 50. The 3D video signal can be provided by a remote media server, a broadcast equipment, etc. based on the available 3D video data in memory , a 3D camera, etc. The video device is coupled to a 3D display device 60 for transferring a 3D display signal 56. The 3D video device has an input unit 51 for receiving the 3D video signal. For example, the device may include an optical disc drive 58 coupled to the input unit for retrieving 3D video information from an optical record carrier 54 such as a DVD or Blu-ray disc. Alternatively, the device may include a network interface unit 59 for coupling to a network 45, for example, the internet or a broadcast network, such as a video device commonly called a set-top box. it can be a satellite receiver, a media player, a personal computer, a mobile device, etc.
    [039] In one embodiment, the 3D source device has a processing unit 42 for determining a change indicator for switching between 2D and 3D, and including the change indicator in the 3D video signal, as explained below.
    [040] The 3D source device can be a server, a broadcast equipment, a recording device, or an authoring system and/or a production system for manufacturing record holders such as Blu-Disc ray. Blu-ray Disc supports an interactive platform for content creators. For stereoscopic 3D video there are many formats. The main formats are stereo and the image format is more depth. Among these, again there are many possible ways where content can be formatted to suit use with new and existing 3D displays and distribution formats. More information about the Blu-ray Disc format is available on the Blu-ray Disc association website in paper or audiovisual application format.
    [041] http://www.blu-raydisc.com/Assets/Downloadabl efile/2b_bdrom_audiovisualapplication_0305-12 955-152 69.pdf.
    [042] The production process further comprises the steps of obtaining the physical pattern of marks in the tracks that configures the 3D video signal including the depth metadata, and subsequently formatting the material of the record holder to provide the tracks of marks in at least one storage layer.
    [043] The 3D video device has a generation unit 52 coupled to the input unit 51 for processing the 3D information for generating a 3D display signal 56 to be transferred by an output interface unit 55 to the device. of display, eg a display signal conforming to the HDMI standard, see "High Definition Multimedia Interface; Specification Version 1.3a of Nov 10 2006" available at http://hdmi.org/manufacturer/specification.aspx. The processing unit 52 is arranged to generate the image data included in the 3D display signal 56 for display on the display device 60.
    [044] The generating unit is arranged for generating the display signal 56 in one of the following selected ways. First, the generating means can be set to generate, as a display signal, a 3D display signal for displaying the 3D video data on the 3D display operating in a 3D mode. The first condition is the traditional generation of a 3D display signal. Second, the generating means can be set to generate, as a display signal, a 2D display signal for displaying 2D video data on the 3D display operating in a 2D mode. The second condition is the traditional way of generating a 2D display signal. The display will be forced to operate in a 2D display mode. Third, the generating means can be adjusted to generate, as a display signal, a pseudo 2D display signal by including the 2D video data in the display signal for displaying the 2D video data in the 3D display operating in 3D mode. Note that the pseudo 2D signal takes the form of a 3D video signal and will be operated by the display as 3D information. However, as the actual video data embedded in the signal is 2D data, the viewer will see the video in 2D.
    [045] The video device has a processing unit 53 for detecting a request to display 2D video data on the 3D display. The order includes any condition that indicates that 2D mode is required, such as a user command to switch to 2D mode, the source material can switch to 2D source material, the system can initiate a 2D mode for displaying advertisements or menus, etc. Second, the processing unit detects that the current operating mode of the display is 3D, for example, detecting that a 3D program is currently being presented. Therefore, it is detected that the 3D display operates in 3D mode. Finally, in response to detecting the request while the display is in 3D mode, the processing unit is arranged to set up the generating means 52 for generating the pseudo 2D display signal for maintaining the 3D mode of the 3D display.
    [046] The 3D display device 60 is for displaying 3D image data. The device has an input interface unit 61 for receiving the 3D display signal 56 including the 3D video data transferred from the video device 50. The transferred 3D video data is processed in the processing unit 62 for display in a 3D display 63, for example a dual or lenticular LCD. Display device 60 can be any type of stereoscopic display, also called 3D display, and has a display depth range indicated by arrow 64 .
    [047] Alternatively, the processing of the 3D video signal and the transition between 3D mode and 2D mode are done in one embodiment of the display device. The 3D video data, and optionally the change indicator, is transferred by the display signal 56. The change is initiated locally on the display device, eg by a user command. The processing unit 62 now performs the pseudo 2D display signal generation functions that are directly coupled to the 3D display. The processing means 62 can be arranged for the corresponding functions described below for the generating means 52 and the processing means 53 in the video device.
    [048] In another embodiment, the video device 50 and the display device 60 are integrated into a single device, wherein a single adjustment of the processing means performs said 2D/3D switching functions.
    [049] Figure 1 still shows the record carrier 54 as a carrier of the 3D video signal. The record holder is disc-shaped and has a track and a center hole. The track, made up of a series of physically detectable marks, is arranged in a spiral or concentric pattern of turns that constitute substantially parallel tracks in the information layer. The record holder can be optically readable, called an optical disc, eg a CD, DVD or BD (Blue-ray Disc) . Information is represented in the information layer by optically detectable marks along the track, eg pits and lands. The track structure also comprises position information, eg headers and addresses, for indicating the location of units information, commonly called blocks of information. The record holder 54 carries the information representing the digitally encoded image data as video, e.g. encoded in accordance with the MPEG2 or MPEG4 encoding system, in a predefined recording format such as the DVD or BD format.
    [050] In various embodiments, the generating means 52 and the processing means 53 in the video device are arranged to perform the following functions are described in detail below.
    [051] Figure 2 shows a decoder model of a 3D player. The player is adapted for playback of stereoscopic 3D content, eg a modified Blu-ray Disc player. A disk drive unit 201 is coupled to a disk processor 202 for error correction (ECC) demodulation and decoding. Video data is retrieved from the disk stream read and a switch 203 provides a TS transport main stream 204 to a buffer 206 coupled to a source depacketizer 208, which provides the data to a PID filter 212, which is a demultiplexer that identifies the packet IDs (PID) of the main TS and transfers each type of data to the respective buffers 214 named EBl-1, EB2-1 for the main 3D video data; EB1-2 and EB2-2 for presentation graphical data and EB1-3 and EB2-3 for interactive graphical data.
    [052] Similarly, the switch 203 provides a TS 205 subtransport stream to a buffer 207 coupled to a source depacketizer 209, which provides the data to a second PID filter 213, which is a demultiplexer that checks packet IDs (PID) of the TS sub and also transfers each type of data to the respective buffers 214.
    [053] The depacketizers 208, 209 also provide initial values 232, 234 to the arrival time clock counters 210,211, which return the values of the arrival timers (i) 231, 233 for the depacketizers based on the clock generator reference 223.
    [054] The respective switches Sl-1, S2-2 and Sl-3 send the data to the decoder 216 (D1) of the main 3D video; to decoder 217 (D2) for presentation graphics and decoder 218 (D3) for interactive graphics. The decoded data is transferred to the respective buffers. The main video data is selected by the switch S2 of the decoder 216 or the buffer 241, and is transferred to the switch S3-1, which provides the final data for a Left view of the main video 225 and a Right view of the main video 226.
    [055] Also, presentation graphics (PG) data from the decoder 217 is transferred to the respective buffers and a flat presentation graphics generator 219 which cooperate with a color look-up table (CLUT) 221. The PG data is selected by the switch S3-2 from generator 219 to provide the final data for a Left view PG 227 and a Right view PG 228.
    [056] Also, interactive graphics data (IG) from decoder 218 is transferred to the respective buffers and a plane generator 220 which cooperates with a color look-up table (CLUT) 222. The IG data is selected by the switch S3-3a from generator 220 to provide the final data for a Left view IG 229 and a Right view IG 230. User interactive inputs can be accommodated by input 240.
    [057] Processing unit 224 controls the operation of the various switches for generating the display signal by including in the output the full 3D data, normal 2D data, or pseudo 2D data.
    [058] The function of the device shown in Figure 2 will now be better described. Packets are filtered from the transport stream that is to be retrieved from disk based on their PID values and stored in the corresponding buffers indicated by EBl-1 to EB3 -3. Packets that belong to elementary streams that carry the main 2D video and the corresponding 2D graphic streams are placed in the upper buffers EBl-1 to EB1-3 and the packets for the auxiliary streams for 3D are placed in EB2-1 to EB2-3 . The auxiliary stream can be a dependent stream for encoding the right view data in dependence on the left view data from the main stream, or depth data such as a depth map and transparency data, etc. Switch Sl-1 through Sl-3 selects the proper buffers and feeds the packets through decoders D1 to D3. After decoding, the decoded video and graphics are output and selection of video and left and right graphics is done by switch S3-1 to S3-3.
    [059] Figure 3 shows the control of the 2D pseudo mode. The function can be performed on a dedicated control unit, or by suitable control software on a processor. First, in Init 2D 301, the request for a 2D display mode is detected, eg by a user command or a system call. In the "Detect 2D" step, the requested 2D display mode is registered, eg in a status register. Then, the normal 2D display signal or the pseudo 2D signal is generated as follows. In the test "3D mode " 303 is determined whether the display signal is currently providing 3D video data to the 3D display. If Yes, the pseudo 2D signal is generated in Pseudo 2D 304. Then, 2D playback is enabled in 3D mode by setting (actually keeping) Switch S1-1...S1-3 in position L, while holding the 3D output mode to keep playback in 3D mode on the display. However, if No (ie current playback is stopped; no 3D material is being provided), the process continues at "Stopped" 305, where the output mode is set to 2D. When it is detected in "Start 2D" 206 that playback is enabled, playback is done by generating a 2D display signal.
    [060] It is noted that by adjusting the switches to use the left video twice, the generating means is arranged for generating the pseudo 2D display signal by obtaining image data without the 3D information of the 3D video data input. Alternatively, for a video image + depth signal, the depth map can be replaced by a simple value that represents a single depth, preferably on the display surface (zero depth).
    [061] Note that when after playback in 2D pseudo mode for a period of time the user stops playback, the mode can automatically switch to normal 2D mode. Alternatively, the display system can remain in pseudo 2D until the user gives another command to actually go to normal 2D mode. Thus, the processing means can be arranged to, while the generating means generate the pseudo 2D display signal, detect that the acquisition of the 3D video data has ended, and, in response to the detection, set the generating means to generate the 2D display sign.
    [062] Figure 4 shows the 3D playback control when in 2D pseudo mode. The sequence of steps is done when the user requests to switch from 2D to 3D playback mode while the system is in 2D pseudo mode. Initially, in "Pseudo 2D" 401 the system is generating the pseudo 2D display signal. In "Init 3D" user can request the display mode to go to 3D. In step "Detect 3D" the requested mode of the 3D display is registered, eg in a condition register. Then, the normal 3D display signal is generated in step "3D Playback"404 enabling 3D playback in 3D mode so that Switch S1-1...S1-3 switches between L and R.
    [063] Figures 3 and 4 illustrate how the transition between 3D and 2D and back can be done when, during playback of a 3D (stereoscopic) movie title, the user decides to change the playback to 2D mode. The player sets the player register that retains the current output mode to 3D. Then it checks if playback is presently active; if yes, the output mode is kept, but the auxiliary or dependent view playback is replaced by the main view repetition. This is done by holding switches S1-1 through Sl-3 in the "L" position (upper position of switches S1-1 through Sl-3 in Figure 1-1) . At the end of playback of the present title and the beginning of a new title, the player device can check the condition of the player's setting output register and start 2D playback if the user selects a title.
    [064] To obtain a smooth transition, the playback device must maintain the signaling in its interface. The interface typically used on Blu-ray Disc players is HDMI. The transmission and signaling of stereoscopic content over HDMI is defined in the specification. There are several stereoscopic video formats that can be streamed in HMDI; here, we will only explain how a commonly used format is transmitted, ie alternative frame stereoscopic video, applying similar principles to the transmission and signaling of other stereoscopic video formats (line alternative, side by side, checkered etc). In the examples in Fig.5, a display signal according to the HDMI standard is shown. However, any video signal that has a format for controlling a 3D video display can be similarly adapted to realize the 2D pseudo mode.
    [065] Figure 5A shows a 3D display signal. The delay and blank periods used when transmitting alternate frame stereoscopic video are in accordance with HDMI. Signaling to indicate where the left frame ends and the right frame begins is done by inserting a blank vertical period. A typical timing for this format would be 1920x1080 at 24 fps and with a Vfreq of 24Hz and blank periods of Hblank 830, Vblank 45 with the pixel clock operating at 148,500 MHz.
    [066] Figure 5B shows a display signal for normal 2D playback. For example, the signal can carry 1920x1080 video at 24 fps with a Vfreq of 24 Hz and blank periods of Hblank 830, Vblank 45 with a pixel clock of 74.250 MHz. Although the signaling of the two formats is similar, the clock pixel operates two times faster and there is an additional blank vertical period in stereoscopic format. Clock pixel changes usually require interface reconfiguration and cause dropped frames. Therefore, pseudo 2D display signal is proposed for 2D/3D mode changes during playback.
    [067] Figure 5C shows a display signal for 2D pseudo playback. In the signal, the pixel frequency is kept at the level of the 3D signal shown in Figure 5A, but the one in the Right frame is replaced by repeating the one in the Left frame as shown. In particular, the Vertical Frequency signal makes the difference with the normal 2D signal in Figure 5B.
    [068] The Blu-ray Disc standard uses a playlist structure to define all the signaling required for a player to play back a 2D or 3D title. A playlist is a sequence of playitems, a playitem is a list of segments of a stream that together make a presentation (Video, Audio Streams, subtitles and other graphics). Inside each playitem there is a table that lists all the elementary streams that are decoded and presented during the playback of a playitem, this table being called table STreamNumber (STN); see Figure 7.
    [069] In one embodiment, when transitioning between 3D and 2D playback, an offset is applied to the 2D image as well as the graphic. The 2D image data is used to generate 3D data as illustrated in Figure 6. The generation unit as discussed above is arranged to, when transitioning between 3D mode and 2D pseudo mode, apply a 3D offset to the 2D video data to change the amount of 3D information.
    [070] Offset can be stored on disk in a table and can be used when the playback device does not support full 3D stereoscopic playback. Alternatively, the offset can be a preset value set in the player, or selected by the user, etc.
    [071] When transitioning between 3D and 2D and back, offset can be gradually applied to the 2D main image when switching from 2D to 3D and gradually reduced when transitioning between 3D and 2D. Thus, the generation means are arranged to apply the 3D shift gradually to gradually change the amount of 3D information.
    [072] Figure 6A shows the application of a 3D offset. an example of 2D image data 601 is combined with 2D graphic data 602 which must be positioned in the depth direction in front of the background image 601. The combined image is used as left view 607. An offset 606 is applied as a shift of the disparity to generate a 608 right view. The user will have a 3D blended view 609. Due to the change, one part 604 of the graph is shortened, while another part remains blank or transparent as there is no information to fill the area.
    [073] For stereoscopic graphics created by applying an offset to a 2D image, problems may occur when the offset is applied to the 2D image in one direction. When the relevant part of the 2D image is located near the edge of the plane after applying an offset, part of the image may lie beyond the boundaries of the plane as shown in Figure 6A at element 610. The number 1 partially disappears in the end view 609 .
    [074] Figure 6B shows the application of a 3D dual offset. The offset is divided by 2 and applied to both the Left and Right output planes (but in opposite directions). By applying half the offset 625 for generating both output planes, as well as the 2D image in both directions, the shortening effect can be reduced as shown in figure 6B. Thus, the generating means is arranged to apply the 3D offset by shifting the 2D video in opposite directions to generate a left output plane and a right output plane.
    [075] Figure 6C shows how to avoid cutting edge when applying offset. The Figure shows a reprinted version of the graphical information. The left-cropped version 630 and the right-cropped version 631 contain no elements in the shortened parts (cropped parts}632, 633. Thus, the final view is improved during creation by ensuring that the image + applied cropping remain within the bounds of both the left and right planes.
    [076] In another embodiment, stretch and non-linear weighting is applied to both the left and right views when using an offset applied to a 2D image to create a stereoscopic perception. By applying an offset and shifting the image to the left and/or right parts of the (video and/or graphic) the background of the image is uncluttered. In case there is no background information available to fill in the unclosed areas, the output image is shortened. To prevent the user from being disturbed by this sudden shortening of the image, the image is weighted non-linearly to fill in the missing unoccluded areas. Thus, the generating means is arranged for non-linear stretching of the 2D video during said shift to cover the parts of the 3D signal that would remain blank on the display due to said shift.
    [077] Figure 7 shows the stream number table, which defines the various data streams in the 3D video signal, called STN_table_3D. The table shows an example of an STN_table_3D for a playitem. Other entries (as discussed below) are included in a regular 2D STN_table. An auxiliary stream input can reference a dependent stream as is the case with stereoscopic video or it can contain a depth map stream or both. Usually the main input contains the independent video for stereoscopic video, eg encoded according to MPEG-4 MVC, while the auxiliary stream subpath can be used to refer to a disparity or depth map that is selected in combination with or instead of the dependent video stream.
    [078] For the playback of a playitem that has a 3D content such as an MPEG MVC stream, which consists of a main and a dependent elementary stream, the STN_table is extended to support the signaling to identify not only the main video stream (like this is the case for normal) 2D playback, but also dependent stream for 3D data. Two options are available for including this information. A new playlist type can be defined or another flag added as extension data to the playlist, which an existing player must ignore. In both cases, a new entry is added to the STN_table that contains an entry for each 3D (stereoscopic) stream in addition to the base view, ie dependent or secondary view streams. The extended 3D STN_table is called STN_table_3D and would normally be added for compatibility reasons as extension data to a playlist where the STN_table_stereoscopic has a loop of playitems and per playitem contains the stream inputs of the main and auxiliary streams.
    [079] The following fields should be noted in the STN table for the definition of STN_table_3D Semantics:
    [080] length: This 16-bit field indicates the number of bytes of STN_table() immediately after this length field and until the end of STN_table().
    [081] keep_3D_mode_during_jplayback
    [082] This field indicates the behavior of the player when transitioning from 3D mode to 2D mode during movie playback. If set to 0b, then the player switches modes. If set to lb, the player maintains the 3D mode, but the player will keep the switches S1-1...S1-3 of the L, R planes in the "L" position, so that the video and/or Graph content will go to 2D by generating the 2D pseudo signal. This signal can be maintained until the playback of the title being presented stops or until the user changes the playback mode to 3D.
    [083] stream_entry() This section defines the stream_entry() of STN_table(); see Figure 8
    [084] stream_entry_auxiliary_view() This entry defines the other stream of video data that makes up the 3D information, such as a independently encoded Right view or depth map. The syntax and semantics are the same for the main view stream_entry.
    [085] stream_attributes() This field defines the stream_attributes() of STN_table(); see Figure 10.
    [086] In one realization, instead of an STN_table_3D for the entire playlist, an STN-table_3D can be added to each playitem. Also, a new playlist can be defined specifically for 3D playback, instead of a 2D playlist extension.
    [087] To minimize transition delays and problems during transitions between 3D and back to 2D mode, a new entry, called change indicator, can be added, which allows the content author to indicate the desired behavior during the transition between 3D and 2D and vice versa. The change indicator is indicative of a 2D mode to be selected. The options for this selection are: (a) switch player modes or (b) indicate the continuation of playback in 3D mode, but with zero disparity (pseudo 2D mode) .
    [088] For the accommodation of the alteration indicator in the video device of Figure 1, the receiving means are arranged to retrieve, from the 3D video signal, the alteration indicator. The processing unit 53 is arranged to, upon detecting said request, display the 2D video data, establish the generating means for generating the display signal in dependence on the change indicator for both 2D mode and 2D pseudo mode .
    [089] In one embodiment, the keep_3D_mode_during_playback field 71,72,73 is an example of the change indicator that indicates the pseudo 2D change mode to be selected, or normal 2D mode. In the example, an indicator 71 is provided for the video main data, another indicator 72 being provided for the presentation graphic data, and another indicator 73 is provided for the interactive graphic data. Note that in other realizations this field can be omitted, it can be just an indicator for all flows, or it can be extended to indicate other conditions of the 2D/3D mode change.
    [090] A method for providing the 3D video signal comprises generating the 3D video signal comprising 3D video data, and including the indicator of change in the 3D video signal. The 3D video signal thus generated can be transferred via a network, broadcast, stored on a record carrier, etc. The method may further include a step of manufacturing the record holder, the record holder being provided with a track of marks representing the 3D video signal.
    [091] Figure 8 shows an input stream. The stream input defines the parameters of the respective stream. In particular, the following fields should be noted in the stream input table for syntax definition:
    [092] length: This 8-bit field indicates the number of bytes of stream_entry() immediately after this length field until the end of stream_entry().
    [093] type: This 8-bit field indicates the type of database for identifying an elementary stream indicated by a stream number for stream_entry(); see Figure 9.
    [094] ref_to_stream_PID_of_mainClip: This 16-bit field indicates a value of the stream_PID[0][stream_index] entries defined in the Clip's Programinfo() indicated by Clip_Information_file_name [0] / Clip_Information_file_name[angle_id] of the Playltem().
    [095] ref_to_SubPath_id: This 8-bit field indicates a value of the SubPath_id entries defined in PlayListO .
    [096] ref_to_subClip_entry_id: This 8-bit field indicates a value of the subClip_entry_id entries defined in a SubPlayitem of the SubPath indicated by ref_to_SubPath_id.
    [097] ref_to_stream_PID_of_subClip: This 16-bit field indicates a value of the stream_PID[0][stream_index] entries defined in the Programinfo() of the Clip indicated by Clip_Information_file_name indicated by ref_to_subClip_entry_id.
    [098] Figure 9 shows a table for the definition of the type in the stream input. The Type value identifies the structure of the respective stream in the 3D video signal, as indicated in the table
    [099] Figure 10 shows the syntax of stream attributes. The stream attributes are part of the STN table as shown in Figure 7. In particular, the following fields should be noted in the stream attribute syntax:
    [0100] length: This 8 bit field indicates the number of bytes of stream_attributes() immediately following this length field and until the end of stream_attributes().
    [0101] stream_coding_type: This 8-bit field indicates the elementary stream encoding type associated with the stream number for stream_attributes(), and should be set to a predefined value, eg 0x20 to indicate a stream dependent on Coded MVC or 0x21 to indicate a depth or disparity map.
    [0102] It will be appreciated for clarity that the above description has described embodiments of the invention with reference to different functional units and processors. However, it will be apparent that any suitable distribution of functionality between different functional units or processors can be used without abandoning the invention. For example, illustrated functionality to be done by separate units, processors or controllers can be done by the same processor or controllers. Thus, references to specific functional units should only be seen as referring to the appropriate means for providing the described functionality, rather than being indicative of a physical or strictly logical structure or organization.
    [0103] The invention may be embodied in any suitable form, including hardware, software, firmware or any combination thereof. The invention can ideally be embodied at least partially as computer software operating on one or more data processors and/or digital signal processors. The elements and components of an embodiment of the invention can be carried out physically, functionally and logically in any suitable way. In fact, functionality can be realized in a single unit, in a plurality of units, or as part of other functional units. Thus, the invention can be carried out in a single unit or it can be physically and functionally distributed among different units and processors.
    [0104] Furthermore, although listed individually, a plurality of media, elements or method steps can be done, eg, by a single unit or processor.
    权利要求:
    Claims (7)
    [0001]
    1. VIDEO DEVICE (50) FOR PROCESSING A 3D THREE-DIMENSIONAL VIDEO SIGNAL, the device comprising receiving means (51,58,59) arranged to receive the 3D video signal and retrieve the 3D video data, generating (52) for generating a display signal for transferring the video data to a 3D display, the generating means being arranged for; - generating in a 3D mode a 3D display signal for displaying the 3D video data on the 3D display operating in a 3D mode, - generating in a 2D mode a 2D display signal for displaying 2D video data on the 3D display operating in a 2D mode, and - generating in a pseudo 2D mode a pseudo 2D display signal by including the 2D video data in the display signal for displaying the 2D video data on the 3D display operating in the 3D mode, and an output interface unit (55) for sending, via a high speed digital interface to a 3D display device (60) having the 3D display, the output signal comprising: - in 3D mode the 3D display signal in format of a 3D signal; - in 2D mode the 2D display signal in the form of a 2D signal; - in 2D pseudo mode the 2D pseudo display signal including 2D video data in the format of a 3D signal, processing means (53) arranged to - detect a request for 3D mode transmission to display 2D video data on the display 3D, characterized in that - receiving means are arranged to retrieve, from the 3D video signal, a change indicator being indicative of selection of the 2D mode or pseudo 2D mode; and the processing means is arranged to, upon detecting said to display 2D video data, set the generating means to generate the change indicator dependency display signal for 2D mode or 2D pseudo mode; the operating mode of display changes according to the selected 2D mode or pseudo 2D mode.
    [0002]
    2. DEVICE according to claim 1, characterized in that the generating means (52) are arranged to, during the generation of the pseudo 2D display signal, generate the 2D video data by obtaining image data without 3D information from the 3D video data .
    [0003]
    3. DEVICE according to claim 1, characterized in that the processing means (53) are arranged to, while the generating means (52) generate the pseudo 2D display signal, detect that the obtaining of the 3D video data has ended, and, in response to detection, establishing the generating means for generating the 2D display signal.
    [0004]
    4. DEVICE according to claim 1, characterized in that the reception means comprise means (58) for reading a record carrier for receiving the 3D video signal.
    [0005]
    5. METHOD FOR PROCESSING A 3D THREE-DIMENSIONAL VIDEO SIGNALS, the method comprising - receiving the 3D video signal and retrieving the 3D video data; generation of a display signal for transferring the video data to a 3D display, the generation being arranged for - generating in a 3D mode a 3D display signal for displaying the 3D video data on the operational 3D display in a 3D mode , - generating in a 2D mode a 2D display signal for displaying 2D video data on the 3D display operating in a 2D mode, and - generating in a pseudo 2D mode a pseudo 2D display signal by including the 2D video data on the display signal for displaying the 2D video data on the 3D display operating in 3D mode; and sending, via a high speed digital interface to a 3D display device (60) having the 3D display, the output signal comprising - in 3D mode the 3D display signal in the form of a 3D signal; - in 2D mode the 2D display signal in the form of a 2D signal; - in pseudo 2D mode the pseudo 2D display signal including 2D video data in the format of a 3D signal - detecting a request for transmission from 3D mode to 2D mode to display 2D video data in 3D display, characterized by the method comprising retrieving the 3D video signal from a change indicator being indicative of selecting 2D mode or pseudo 2D mode; and in response to detecting said request to generate the change indicator dependency display signal for 2D mode or 2D pseudo mode; the operating mode of display changes according to the selected 2D mode or pseudo 2D mode.
    [0006]
    6. METHOD FOR THE PROVISION OF A 3D THREE-DIMENSIONAL VIDEO SIGNAL FOR TRANSFER TO A 3D VIDEO DEVICE, as defined in claim 1, the method comprising - generating the 3D video signal comprising 3D video data, and - including the change indicator in the 3D video signal, the change indicator being indicative of a 2D mode to be selected for, in the device, upon detecting said request to display 2D video data, establishing the generating means for generating the signal. output in dependence on the change indicator to 2D mode or pseudo 2D mode and change the display operating mode according to the selected 2D mode or pseudo 2D mode.
    [0007]
    7. RECORDING SUPPORT, characterized in that it comprises the three-dimensional, 3D video signal, as defined in claim 6.
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    法律状态:
    2017-09-19| B25D| Requested change of name of applicant approved|Owner name: KONINKLIJKE PHILIPS N. V. (NL) |
    2017-10-03| B25G| Requested change of headquarter approved|Owner name: KONINKLIJKE PHILIPS N. V. (NL) |
    2019-01-15| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2020-01-21| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-03-10| B15K| Others concerning applications: alteration of classification|Free format text: A CLASSIFICACAO ANTERIOR ERA: H04N 13/00 Ipc: H04N 13/194 (2018.01), H04N 13/359 (2018.01), H04N |
    2021-05-11| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-07-13| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 10 (DEZ) ANOS CONTADOS A PARTIR DE 13/07/2021, OBSERVADAS AS CONDICOES LEGAIS. PATENTE CONCEDIDA CONFORME ADI 5.529/DF, QUE DETERMINA A ALTERACAO DO PRAZO DE CONCESSAO. |
    优先权:
    申请号 | 申请日 | 专利标题
    EP09166461|2009-07-27|
    EP09166461.5|2009-07-27|
    PCT/IB2010/053318|WO2011013036A1|2009-07-27|2010-07-21|Switching between 3d video and 2d video|
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