• 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:
    A playback circuit for a color television signal wherein the color signals cover a first lower frequency range of the total video bandwidth and appear as three sequential signals each one horizontal picture line in duration and each corresponding to one of the basic colors. The playback circuit has a first signal channel for the processing of the sequential color signals in this first frequency range and a second signal channel responsive to the video signals in a second frequency range which includes the first frequency range. The first signal channel includes a circuit, including a memory, at whose output the sequential signals are simultaneously made available. A circuit is provided for deriving a difference signal from the simultaneously available color signals and the instantaneous sequential input signal to the memory and this difference signal is added to the signal in the second signal channel to cancel out signal differences between three consecutive lines which depend on the color information in the first frequency range.
    公开号:SU709015A3
    申请号:SU731886363
    申请日:1973-02-08
    公开日:1980-01-05
    发明作者:Шольц Вернер
    申请人:Тед Бильдплаттен Акциенгезельшафт Аег-Телефункен Телдек (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to television, can be used in color television systems.
    A device for reproducing a sequential three-line color television signal containing a low-pass filter, connected to the first delay block by an output, three outputs of which are connected to the corresponding inputs of the first matrix, and a second delay block, the input of which is connected to the low-pass filter input, and the output from the first input of the first adder [1].
    However, the known device does not provide a sufficiently high quality reproduced image.
    The purpose of the invention is improving the quality of the reproduced image.
    To do this, into a device for reproducing a sequential three-line color television signal containing a low-pass filter, connected to the first delay block by the output, three outputs of which are connected to the corresponding inputs of the first matrix, and a second delay block, the input of which is connected to the low-pass filter input, and you2 stroke - with the first input of the first adder, the second matrix is introduced, the output is connected through an additionally entered second adder with the second input of the first adder.
    Three inputs of the second _ matrix are connected to the corresponding outputs of the first delay unit, and the second input of the second adder is connected to the output of the low-pass filter. Three inputs of the second matrix can be connected ΙΟ with the corresponding outputs of the first delay block through the switch.
    The drawing shows a structural electrical diagram of the proposed device.
    A device for reproducing a sequential three-line color television signal contains a low-pass filter 1, delay blocks 2 and 3, matrices 4 and 5, adders 6-8, switch 9, amplifier 10, demodulator 2 0, and I, a sensor .12.
    The device operates as follows.
    From the recording unit 13 three signals
    E (Y)> F (R — Y) and F (B — Y) are input to the device. At the three outputs of the switch 9 are constantly signals F ^, F Q F a
    which in the matrix 4 are converted into color difference signals R-Y and B-Y.
    The signal and the differential signal —Υ are obtained in matrix 5 and adder 7 with a color hanging frequency, amplifier 10 serves to change the polarity of the signal. The received difference signal through the demodulator 11 is supplied to the adder 6. On the matrix 4 of the signals Fp, Fg, F e the color subcarrier frequency F Pj4L is obtained which in the adder 8 is combined with the luminance signal F 4 , forming the signal FBAS. The signal of the black-and-white television image (Fi = F2 = F 3 ), the difference signals at the output of the demodulator 11 are equal to zero, and the brightness signal Y does not change, passes through the delay unit 3 and the adder 6. In this case, the matrix 4 does not produce a signal. To eliminate possible interference, the filter 1 is blocked by voltage from the sensor 12. The synchronization signal is transmitted directly through the delay unit 3 and the adder 6. At the output of the matrix 4, a difference signal is generated, so that the influence of the constant voltage component disappears. Since the synchronizing signal does not pass to the delay unit 2, the amplitude of the oscillations of the carrier frequency decreases.
    Using the proposed device improves the quality of the image.
    权利要求:
    Claims (2)
    [1]
    : which in matrix 4 are converted to color difference signals R-Y and B-Y. The signal F, and the difference signal Pp-Y are obtained in the matrix 5 and the adder 7 with the color suspension, the amplifier 10 serves to change the polarity of the signal. The received difference signal through demodulator 11 is supplied to adder 6. On matrix 4, the color subcarrier frequency Fp is obtained from signals F, j, P, Fg, which in combiner 8 is combined with a luminance signal Fv, forming the signal FBAS. For a black and white television image signal (), the difference signals at the output of demodulator 11 are zero, and the luminance signal U does not change, passes through delay block 3 and adder 6. At the same time, matrix 4 does not output a signal. To eliminate possible interference, filter 1 is blocked by voltage from sensor 12. The synchronizing signal is transmitted directly through delay unit 3 and adder 6. At the output of matrix 4, a difference signal is formed, thereby eliminating the effect of the constant voltage component. Since the clock signal does not travel to the delay unit 2, the amplitude of the carrier frequency is reduced. When using the proposed device, the image quality is improved. Claim 1. A device for reproducing a consecutive three-line color television signal comprising a low-pass filter, an output connected to a first delay unit, three outputs of which are connected to the corresponding inputs of the first matrix and a second delay unit, whose input is connected to the input of a low-pass filter, and output with the first input of the first adder, characterized in that, in order to improve the quality of the reproduced image, a second matrix is inserted into it, the output connected through an additional A second input adder with a second input of the first adder, with three inputs of the second matrix connected to the corresponding outputs of the first delay unit, and a second input of the second adder connected to the output of a low-pass filter.
    [2]
    2. The device according to claim 1, characterized in that the three inputs of the second matrix are connected to the corresponding outputs of the first delay unit through a switch. Sources of information taken into account during the examination 1. A. Goncharov, V. et al., Magnetic Recording Technique M., Sv, 1970, p. 253-257 (prototype).
    类似技术:
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    同族专利:
    公开号 | 公开日
    DE2207021A1|1973-08-30|
    FR2172092B1|1976-04-30|
    IT972737B|1974-05-31|
    JPS5630989B2|1981-07-18|
    DE2207021B2|1974-05-02|
    GB1372822A|1974-11-06|
    DE2207021C3|1974-11-21|
    FR2172092A1|1973-09-28|
    BR7300552D0|1973-09-20|
    US3808359A|1974-04-30|
    JPS4895122A|1973-12-06|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2903503A|1954-11-03|1959-09-08|Electric Machinery Mfg Co|Electrical distribution system|
    US3440339A|1966-06-10|1969-04-22|United Control Corp|Color television recording system|
    US3715465A|1971-04-23|1973-02-06|R Mcmann|Apparatus for developing simultaneous color television signals including a striped color filter constructed to generate a pilot signal for component video signal separation|US4160994A|1975-06-07|1979-07-10|Sonex International Corp.|Luminance key amplifier|
    JPS5270717A|1975-12-09|1977-06-13|Sanyo Electric Co Ltd|Video disk player|
    DE2612619C3|1976-03-25|1978-09-21|Ted Bildplatten Ag Aeg-Telefunken- Teldec, Zug |Tri-line sequential transmission system for a color television signal, in particular for recording|
    GB2227899A|1988-11-10|1990-08-08|Spaceward Ltd|Colour video signal processing|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE2207021A|DE2207021C3|1972-02-15|1972-02-15|Reproduction circuit for a three-line sequential color television signal|
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