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Method-and-apparatus-for-simultaneously-recording-two-independent-video-signals

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Method and apparatus for simultaneously recording two independent video signals

Details

Inventors: Eguchi, Takeo;
Assignee: Sony Corporation (Tokyo, JP)
Primary Examiner: McElheny, Jr.; Donald
Assistant Examiner:
Attorney, Agent or Firm: Sinderbrand; Alvin, Frommer; William S.

A method for recording and reproducing a color video signal having a luminance signal and two difference chroma signals together with a key signal by means of two video tape recorders which are synchronously driven comprises the steps of dividing the two difference chroma signals so as to obtain respective high and low frequency components, recording a first video signal including the luminance signal and the respective low frequency components of the two difference chroma signals, recording a second video signal including the key signal and the respective high frequency components of the two difference chroma signals, both the first and second video signals being recorded in a format for 4:2:2 digital video signal processing by using a 4:2:2 type video tape recorder for each of the first and second video signals, respectively, reproducing the first and second video signals, and combining the reproduced first and second video signals so as to obtain the color video signal and the key signal.

DETAILED DESCRIPTION It is an object of the present invention to provide an improved method for recording and reproducing a color video signal which can remove the above-mentioned defects inherent in the prior-art method.
It is another object of the present invention to provide a method for recording and reproducing a color video signal in which a color video signal can be recorded and reproduced by using two conventional 4:2:2 type digital video tape recorders without using a new digital video tape recorder.
It is still another object of the present invention to provide an apparatus for recording and reproducing a color video signal having a compatibility with a conventional 4:2:2 type digital video tape recorder format and which has a recording capacity twice as large as that of the conventional 4:2:2 type digital video tape recorder.
According to an aspect of the present invention, there is provided a method for recording and reproducing (1) a color video signal having a luminance signal and a plurality of difference chrominance signals having a equivalent frequency band width equivalent to that of the luminance signal, and (2) an independent video signal which is different from the color video signal, comprising the steps of: (a) dividing each of said difference chrominance signals so as to obtain low and high frequency components; (b) generating a first video signal having said luminance signal and said low frequency components of said difference chrominance signals, and a second video signal having the independent video signal and the high frequency components of said difference chrominance signals; (c) recording said first and second video signals by using first and second video tape recorders respectively which are synchronously driven; (d) reproducing said first and second video signals by said first and second video tape recorders respectively; and (e) combining said reproduced first and second video signals so as to regenerate said color video signal and the independent video signal

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