• 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 invention improves the recording quality by reducing crosstalk. The device contains 1st lowpass filter (LPF) 1, delay line 2, frequency modulator 3, high pass filter 4, mixer 5, amplifier 6, balanced modulator 8, reference frequency generator 9, key 10, horizontal sync pulse selector 12, frame sync selector 13, two triggers 14 and 15, electr-16, rotary magnet i7 block. heads, servo 18. The comb filter 7 and the 2nd low-pass filter 11 were reintroduced. 3 Il. ОО О О) д ю / 00 О 00 НЫ Ф1а.Г
    公开号:SU1327808A3
    申请号:SU833642363
    申请日:1983-08-24
    公开日:1987-07-30
    发明作者:Амари Синидзи
    申请人:Сони Корпорейшн (Фирма)；
    IPC主号:
    专利说明:

    This invention relates to the recording of color video signals.
    The aim of the invention is to improve the recording quality by reducing crosstalk.
    Fig. I is a block diagram of a device for recording color video signals; FIG. 2 is a fragment of a tape recording; FIG. 3 shows timing diagrams explaining the operation of the device.
    The device for recording color video signals contains the first low-pass filter 1 (LPF) ,, delay line 2, frequency modulator 3, high pass filter 4 (HPF), mixer 5, amplifier 6, comb filter 7, balanced modulator 8, and generator 9 frequencies, key 10, second LPF 11, selector 12 horizontal sync pulses (FID), selector 13 frame sync impulses (XNI), first 14 and second 15 triggers, element 16, block 17 of rotating magnetic heads, servo 18.
    The device works as follows;
    The full video signal contains the left and right color components and is fed to the input of the low-pass filter I and, via line 2, to the input of the frequency modulator 3. The output signal of the frequency modulator 3 is fed through the high-pass filter 4 to the mixer 5
    The full video signal is fed to the input of the comb filter 7, which extracts the chroma signal. The output of the graded filter 7 is connected to one of the inputs of the balanced modulator 8, the other input of which receives a signal from the output of the generator 9, the balance modulator 8 has two outputs connected to the inputs of the key 10, the output of which is connected through the LPF 11 to the other input of the mixer five.
    The full video signal also goes to the inputs of selectors FID and XI 12 and 13, the outputs of which are connected via triggers 14 and 15 to the inputs of element I 16, the output of which is connected to the control input of the key 10. The output signal of the trigger 15 is connected to the servo drive 18 and a signal sensor 19 for controlling the recording along the edge of the magnetic tape 20.
    A generator 9 provides a signal with a frequency of fg 5 which is mixed with the constituent chrominance signals in
    balanced modulator 8; Ne output of a balanced modulator 8, there are two signals C ,,, and -C, i.e. two signals of opposite polarity that
    can be shifted in phase one relative to the other by 180, Each of the signals C and -C has a carrier frequency g, and is fed alternately
    the HPF 11 input, which suppresses unwanted sidebands and transmits to the mixer 5 a color component signal converted at the corresponding frequency,
    The key 10 selects the signals Cg or -Ca by the element AND 16 ,.
    The recording of signals C and -C is illustrated in FIG. 2, which shows a section of magnetic tape 20 with tracks 2 and 22 recorded on it, Track 21 is shown with four linear zones 23-26, and track 22 with four linear zones 27-30 which are placed in such a way that
    The edges of the bands between them are placed on
    one right my. Each of the linear zones 23-26 and 27-30 has two arrows, most of which indicate the polarity of the carrier converted by
    the color component frequency, and the smaller polarity of the carrier of the crosstalk signal, which is the frequency conversion signal of the color component in the next adjacent linear zone of the adjacent track. From figure 2 it can be seen that all the color-converted signals of the color components recorded in tracks 21 and 22 have a carrier of the same polarity, that is. polarity of Cc signals (or-C ,,,.
    The output signal P of the trigger 14 has a duration equal to the duration of one scale (IH) and a frequency equal to 1/2, where the repetition rate of the lines (Fig. 3a).
    The output signal P of the trigger 1 5 has a duration of 1, where v is the duration of the field (Fig. 36),
    The output signal of the element And 16 has a low level for a duration of a half TC and a high level during a duration of alternating fields Tj, (Fig. Sv).
    From FIG. 2 (It follows that when the output level of the element 16 is low, the signal Cd is connected to the input of the high-pass filter 11, and when the output level of the element 16 is high, the signal-circuit
    In addition, the output of the trigger 15 is connected to the sensor 19, which is located just to one edge of the recording medium on the magnetic tape 20 for recording control signals. The magnetic tape 20 is wrapped in a spiral around the drum 31, which consists of the upper 32 and lower 33 parts and the gap behind between them. Two sensors 35 and 36 are located on opposite sides of a slider 37 attached to the end of a shaft 38 driven by a motor 39. Amplifier 6 connects mixer 5 to sensors 35 and 36.
    权利要求:
    Claims (2)
    [1]
    Invention Formula
    A device for recording color video signals containing a serially connected first low pass filter and a delay line, a frequency modulator connected in series, a high pass filter and a mixer whose output is connected to a rotating magnetic head unit, a balanced modulator whose first input is connected to a reference frequency generator output , key, first and wto8. ,
    a swarm of triggers whose outputs are connected to the corresponding inputs of the element I, as well as the personnel selector. sync pulses and a horizontal sync pulse selector, whose inputs are combined with the input of the first low-pass filter and are the input of the device, characterized in that, in order to improve the recording quality by reducing crosstalk, a comb filter and a second low-pass filter are introduced, while the output of the delay line connected to the input of the frequency modulator,; the input of the comb filter is combined with the input of the first low-pass filter, the balanced modulator, the key and the second low-pass filter are connected in series between the output of the comb filter and the second input of the mixer, the output of the horizontal sync pulse selector is connected to the input of the first trigger, and the output of the HR sync selector switch is connected to the input of the second trigger whose output is connected to the servo drive, and the output of the And input is connected to the control input of the key.
    2
    [2]
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    类似技术:
    公开号 | 公开日 | 专利标题
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    GB1263982A|1972-02-16|Method and system for recording sampled signals on a continuous recording medium
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    US2995620A|1961-08-08|Color television-signal convepsion apparatus
    USRE29975E|1979-04-24|Magnetic recording and/or reproducing system
    同族专利:
    公开号 | 公开日
    BE818330A|1974-11-18|
    ZA744802B|1975-10-29|
    JPS5827716B2|1983-06-10|
    SU1466667A3|1989-03-15|
    JPS5034419A|1975-04-02|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    JPS4944535B1|1970-01-26|1974-11-28|
    JPS5133690B2|1971-08-13|1976-09-21|JPS587114B2|1974-12-27|1983-02-08|Matsushita Electric Ind Co Ltd|
    JPS5823997B2|1975-06-12|1983-05-18|Sony Corp|
    JPS529318A|1975-07-14|1977-01-24|Victor Co Of Japan Ltd|Recording and regenerating system for color picture signal|
    JPS5554061Y2|1975-08-13|1980-12-15|
    JPS559877B2|1975-10-29|1980-03-12|
    JPS5611264B2|1976-05-04|1981-03-13|
    JPS6222516U|1985-07-25|1987-02-10|
    JPS6234329U|1985-08-16|1987-02-28|
    JPS63144674A|1986-12-09|1988-06-16|Canon Inc|Image information recorder|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    JP48086111A|JPS5827716B2|1973-07-31|1973-07-31|
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