TH19745B - Circuit for recording and generating the reference signal of the time base error correction device (TBC). - Google Patents

Abstract

A circuit for recording and producing a TBC reference signal for use in a video recording/production system, as well as a circuit for adding to the video signal to be recorded the TBC reference signal, where the TBC reference signal has an adjustment range corresponding to the TBC reference signal. synchronization changes of the video signal and the circuit for generating and producing the TBC reference signal from the video signal read from the recording medium in order to correct the time base error in the video signal. Video signal error time base correction circuit based on TBC reference signal produced according to video signal from recording medium during signal production.

Claims (5)

1.Circuit for recording color video signals Which consists of Section (110,111) for modulating the illumination and color elements of the said colored video signal to be recorded on the recording medium. Section (120) for separating the horizontally synchronized signal from the said light output of the said color video signal. Section (130) is for the TBC reference signal generator in the form of a clock pulse with the time period that changes with the change in the interval of the horizontal synchronized signal of the color video signal. Section (144,143) for adding the said TBC reference signal to the modulated video signal component from the section (110,111) of such color video signal modulation. Section (160) for recording such a modulated video signal where the reference signal TBC is added by adding that reference signal on the recording medium. Where the aforementioned reference boost consists of a modulator (143) for merging such modulated video signals. The addition of the said reference signal further includes the addition of a time control (146) for the said TBC reference signal can be added during the signaling period. The aforementioned modulated video and its special feature that such a reference signal boost is also included in the section (141,142) standard frequency modulated signal generation for modulated signal generation. First standard frequency And second, from the synchronization signal exiting the separation segment by modulating the horizontal synchronization signal frequency detected by the first carrier signal. And the blanking interval pulses that were detected by the second carrier signal respectively to be used as The standard frequency in the said blocking range so that the modulated signal of that frequency can be interlaced with that TBC reference signal within that blocking range of the modulated video signal. To prevent interference with time base 2. Circuit as stated in claim 1, where the TBC reference signal is distributed within a higher frequency band width of the modulated signal. First standard frequency And second as mentioned And that color signal in the blocking range of the modulated video signal 3. The circuit as specified in Clause 1 or 2, which the circuit also consists of. The circuit for producing the TBC reference signal, where the circuit for producing the TBC reference signal consists of Section (300) for reading the video signal code where the TBC reference signal is inserted from the recording medium. Section (320,321) for the decoding of the read video signal code to generate the video signal. Section (351) is for separating the TBC reference signal from the video signal it reads. Section (360) for reversing the TBC reference signal extracted by outputting a frequency signal corresponding to the aforementioned TBC reference signal frequency to feed the said reversed TBC reference signal in the form of a clock pulse to the circuit. TBC (330,331) for correcting the time base error of such demodulated video signal. By the TBC reference signal that was reversed. 4.Circuit as defined in claim 1, where the aforementioned compression segment is equipped with a band-pass filter (351). 5. Recording and / or video output equipment is supplied to the circuit as described in one of the above claims.