• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to a broadcasting channel circuit for transmitting from a broadcasting audio broadcasting station to a transmitting station using an E1 or T1 PCM line, and in particular, maintains a phase difference between two left and right channels generated during stereo configuration of the broadcasting channel circuit. In the broadcasting channel circuit comprising an A / D converter, a compression unit, a shuffling unit, and a packing unit, the applied analog signal is applied to a time slot position on a PCM line to be used by the broadcasting channel circuit. An A / D converter for sampling and converting the generated sampling timing control signal into a digital signal, a packing unit for binding the applied digital signal into a package suitable for transmission over a PCM line by the control signal, and a system clock. And a control signal generator having a function of receiving control information and generating a signal for controlling each unit. And a sampling timing controller having a function of generating a sampling timing signal by receiving a control signal from a signal generator. A conventional audio signal of two left and right channels is simultaneously sampled, and the same time slot of different PCM lines is used. In case of transmission through the A / D converter and the D / A converter, the sampling timing generated based on the time slot position on the PCM line to be used for transmission is maintained. By resolving the phase difference of, there is an effect of maintaining the sound quality suitable for stereo broadcasting even when the line configuration other than the conventional constraints without using a separate channel for transmitting the phase information.
    公开号:KR20000042694A
    申请号:KR1019980058960
    申请日:1998-12-26
    公开日:2000-07-15
    发明作者:박성재
    申请人:서평원；엘지정보통신 주식회사；
    IPC主号:
    专利说明:

    Broadcast channel circuit considering phase difference compensation in stereo configuration
    The present invention relates to a broadcasting channel circuit for transmitting a broadcasting audio signal from a broadcasting station to a transmitting station using an E1 or T1 PCM line. In particular, when a stereo circuit of a broadcasting channel circuit is configured, a phase difference between two left and right channels occurs. The present invention relates to a circuit which is maintained to be suitable for broadcasting.
    In general, a broadcasting channel circuit for transmission using a PCM line has a circuit for transmitting and receiving separately. The audio signals of the two channels are simultaneously sampled and transmitted from the broadcasting station to the transmitting apparatus through the time slots of the same position on separate PCM lines which are independent of each other, and the phase difference suitable for broadcasting is maintained only in the above configuration. Two PCM lines were needed.
    Hereinafter, a conventional technology will be described with reference to the accompanying drawings.
    Fig. 1A is a functional block diagram of a transmitter of a broadcast channel circuit according to the prior art. The transmitter of a broadcast channel circuit using a PCM line according to the prior art converts a broadcast analog audio signal into a digital signal. D) a converter 10 and a compressor 20 having a function of compressing a plurality of digital bit strings converted by the A / D converter to be suitable for PCM transmission to increase transmission efficiency and signal-to-noise ratio; A shuffling unit 30 for rearranging the digital data compressed by the compression unit 20 according to the PCM coding low, and the digital data generated by the shuffling unit 30 for broadcasting. It is composed of a packing section 40 having a function of loading a time slot of a PCM line to be used by the channel circuit.
    1B is a functional block diagram of a receiver of a broadcast channel circuit according to the prior art.
    The receiving unit of the broadcasting channel circuit using the PCM line according to the prior art has a packing release unit 45 for extracting digital data from data received on the PCM line, and a 12-bit data received from the packing release unit 45. The shuffling canceler 45 for checking parity bits and releasing the remaining 11-bit shuffling, and the 11-bit data generated by the shuffling canceler 45 are expanded to 14-bit digital data. The decompression unit 25 and the D / A converter 15 converting the extended 14-bit digital data into analog data for transmission.
    Hereinafter, with reference to the accompanying drawings, the prior art such as the above configuration will be described in detail.
    The analog signal of the audio band received from the broadcasting equipment is sampled by the A / D converter 10, and one analog sample data is converted into a 14-bit digital signal.
    If the 14 digital signals are transmitted as they are, extra bits are generated when applied to the 8-bit PCM transmission line, which increases the occupancy of time slots on the PCM transmission line, and the signal-to-noise ratio deteriorates toward the lower level signal. In 20, the 14-bit linear data received from the A / D converter 10 is compressed to 11 bits through nonlinear encoding. If more than seven "0s" occur continuously in the signal transmitted through the transmission line, an error occurs on the receiving side. In order to prevent an error, the shuffling unit 30 received from the compression unit 10 according to a predetermined rule. The digital signal is rearranged and a parity bit for data error detection is inserted into a 12-bit signal.
    The packing unit 40 performs the function of grouping the digital signals received from the shuffling unit 30 into 8-bit transmission package units suitable for the PCM line as shown in FIG. 1C and loading them on the PCM line.
    The unpacking unit 45 of the receiver extracts digital data from the data arriving from the transmitter via the PCM line, and the shuffling unit 45 performs parity on the 12-bit data received from the unpacking unit 45. By extracting the bits and comparing the parity values calculated from the received data, the validity of the received data is checked, and the shuffling processed by the transmitter is performed in the reverse order with respect to the remaining 11 bits. In step 11, the 11-bit data generated by the shuffling release unit 45 is extended to 14-bit linear digital data.
    The expanded 14-bit digital data is reproduced as an analog audio signal through the D / A converter 15.
    As described above, in the stereo broadcasting configuration, audio signals of two left and right channels are simultaneously sampled and transmitted from a broadcasting station to a transmitting station of a transmitting station through time slots of the same position on independent PCM lines. Only in the same configuration, since a phase difference suitable for stereo broadcasting is maintained, there is a problem in that two PCM lines are required.
    The present invention provides a phase difference suitable for stereo broadcasting only when audio signals of two left and right channels are simultaneously sampled and transmitted through the same time slot of independent PCM lines. By applying the sampling timing generated based on the time slot position on the PCM line to be used for transmission to the A / D converter and the D / A converter, the phase difference of the left and right signals is resolved. It is an object of the present invention to provide a broadcasting channel circuit that maintains a phase difference and sound quality suitable for stereo broadcasting even in a line configuration other than conventional constraints without using a separate channel for transmission.
    1A is a functional block diagram of a transmitter of a broadcast channel circuit according to the prior art;
    1B is a functional block diagram of a receiver of a broadcast channel circuit according to the prior art;
    1C is a packing example of a broadcast channel circuit,
    2A is a functional block diagram of a transmitter of a broadcast channel circuit considering phase difference compensation in a stereo configuration according to an embodiment of the present invention.
    2B is a functional block of a receiver of a broadcast channel circuit in consideration of phase shifter compensation in stereo configuration according to an embodiment of the present invention.
    Explanation of symbols on the main parts of the drawings
    10: A / D converter 15: D / A converter
    20: compression unit 25: decompression unit
    30: shuffling portion 35: shuffling release portion
    40: packing part 45: packing release part
    50, 50 ': sampling timing controller 50, 60': control signal generator
    In order to achieve the above object, the present invention provides a receiver for receiving from the PCM transmission line and the D / A converter for transmitting the audio signal for broadcasting through the PCM transmission line from the PCM transmission line, Adds a sampling timing control circuit that delivers the sampling timing generated based on the time slot position on the PCM line, and a control signal generation circuit that receives clock and control information from the system and outputs it to the sampling timing control circuit and the packing and unpacking sections. By maintaining the phase difference of left and right signals for stereo broadcasting in stereo configuration, phase difference and sound quality suitable for stereo broadcasting in line configuration other than the conventional constraint without using separate channel for transmitting phase information Can be provided.
    Hereinafter, a broadcast channel circuit considering phase difference compensation when a stereo channel circuit is constructed according to the present invention will be described with reference to the accompanying drawings.
    2A is a functional block diagram of a transmitter of a broadcast channel circuit considering phase difference compensation in a stereo configuration according to an embodiment of the present invention.
    The transmitter of the broadcasting channel circuit using the PCM line according to an embodiment of the present invention, the analog / digital (A / D) converter 10 having a function of converting the broadcast analog audio signal into a digital signal, and the A / D converter Compression unit 20 compresses the digital bit strings converted by the PCM to be suitable for PCM transmission, and rearranges the digital data compressed by the compression unit 20 to increase transmission efficiency and signal-to-noise ratio. A sampling timing control unit for transmitting a sampling timing signal generated based on a time slot position on a PCM line to be used by the shuffling unit 30 and the digital channel generated by the shuffling unit circuit for broadcasting channel circuits ( 50 and a control signal generator 60 for outputting the clock and control information received from the system to the sampling timing controller 50 and the packing unit 40.
    2B is a functional block diagram of a receiver of a broadcast channel circuit considering phase difference compensation in a stereo configuration according to an embodiment of the present invention.
    The receiving unit of the broadcasting channel circuit using the PCM line according to an embodiment of the present invention is a packing release unit 45 for extracting digital data from the data received on the PCM line, and 12 bits received from the packing release unit 45 14-bit linear digital data of the 11-bit data generated by the shuffling release unit 45 and the shuffling release unit 45 to check the parity bit and release the remaining 11-bit shuffling. The decompression unit 25 that decompresses the data and the D / A converter 15 and the D / A converter 10 that converts the extended 14-bit linear digital data into analog data for transmission and transmit the time on the PCM line. Sampling timing controller 50 'that delivers the sampling timing generated based on the slot position, and control signal generation that outputs the clock and control information received from the system to sampling timing controller 50' and unpacking unit 45. part 60 '.
    Hereinafter, a broadcast channel circuit considering phase difference compensation in a stereo configuration according to the present invention will be described in detail with reference to the accompanying drawings.
    The analog signal of the audio band received from the broadcasting equipment is sampled according to the sampling timing generated by the A / D converter 10 based on the time slot position on the PCM line provided by the sampling timing controller 50, and one analog signal. Sample data is converted into a 14-bit linear digital signal. The 14 linear digital signals are compressed to 11 bits by nonlinear encoding by the compression unit 20. In order to prevent errors caused by seven or more consecutive '0's during transmission, the shuffling unit 30 rearranges the digital signals received from the compression unit 10, and calculates the data errors to detect and validate the data. Parity bit is added to make a 12-bit signal.
    The packing unit 40 bundles the digital signal received from the shuffling unit 30 into 8-bit transmission package units suitable for the PCM line as shown in FIG. 1C and loads the digital signal on the PCM line. The control signal generator 60 ) Adjusts the sampling timing controller 50 and the packing unit 40 using the clock and control information received from the system.
    Therefore, based on the time slot position on the PCM line, the A / D converting section of the transmitting section of the broadcasting channel circuit for transmitting the broadcast audio signal through the PCM transmission line and the receiving section and the D / A converting section received from the PCM transmission line. Sampling timing controllers 50 and 50 'which deliver the generated sampling timing, and clock and control information from the system to the sampling timing controllers 50 and 50', packing unit 40 and unpacking unit 45. By adding an output control signal generator 60, 60 'to maintain the phase difference of the left and right signals suitable for stereo broadcasting in stereo configuration, the conventional constraint condition is eliminated without using a separate channel for transmitting phase information. In the case of other lines, phase difference and sound quality suitable for stereo broadcasting can be provided.
    The broadcast channel circuit considering phase difference compensation in the stereo configuration of the present invention configured as described above includes a receiver for receiving an A / D converter from a transmitter of a broadcast channel circuit for transmitting a broadcast audio signal through a PCM transmission line and a receiver for receiving the PCM transmission line and D. A sampling timing control circuit that delivers sampling timing generated based on the time slot position on the PCM line to the / A converter, and receives clock and control information from the system and outputs the sampling timing control circuit, the packing unit, and the unpacking unit to the sampling timing control circuit. When the stereo circuit is configured by using the control signal generator, the phase difference between the left and right signals is properly maintained for stereo broadcasting so that a line other than the constraints of the prior art is not required without using a separate channel for transmitting phase information. Can provide phase contrast and sound quality suitable for stereo broadcasting. There is an effect.
    权利要求:
    Claims (3)
    [1" claim-type="Currently amended] A broadcast channel circuit having a receiver comprising an A / D converter, a compression unit, a shuffling unit, a packing unit, a D / A converter, a decompression unit, a shuffling unit, and a depacking unit. In
    An A / D converter and a D / A converter for performing sampling based on a sampling timing signal applied from a sampling timing controller,
    A sampling timing controller which receives a control signal of the control signal generator and transmits a sampling timing signal determined based on a time slot position on a PCM line to be used by the broadcasting channel circuit, to an A / D converter and a D / A converter;
    Broadcast channel circuit considering phase difference compensation in stereo configuration, characterized in that it is composed of a control signal generator having a function of generating a signal for controlling each part by using the clock and control information received from the system
    [2" claim-type="Currently amended] The method of claim 1
    The transmitter includes an A / D converter, a compressor, a shuffling unit, a packing unit, a sampling timing control unit, and a control signal generation unit.
    [3" claim-type="Currently amended] The method of claim 1
    The receiver includes a D / A converter, a decompression unit, a shuffling unit, a packing release unit, a sampling timing control unit, and a control signal generation unit. Broadcast channel circuit
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    同族专利:
    公开号 | 公开日
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    1998-12-26|Application filed by 서평원, 엘지정보통신 주식회사
    1998-12-26|Priority to KR1019980058960A
    2000-07-15|Publication of KR20000042694A
    优先权:
    申请号 | 申请日 | 专利标题
    KR1019980058960A|KR20000042694A|1998-12-26|1998-12-26|Broadcasting channel circuit|
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