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Video-tape-recorder-for-recording-reproducing-two-channel-component-color-video-signals

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Video tape recorder for recording/reproducing two-channel component color video signals

Details

Inventors: Morioka, Yoshihiro; Kobayashi, Masaaki;
Assignee: Matsushita Electric Industrial Co., Ltd. (Osaka, JP)
Primary Examiner: Faber; Alan
Assistant Examiner: Young; W. R.
Attorney, Agent or Firm: Wenderoth, Lind & Ponack

A video tape recorder has a pair of rotary magnetic heads spaced apart by 180.degree. from each other on a rotary cylinder which rotates one turn (360.degree.) during each field of a video signal to be recorded. A recording circuit has first and second memories for respectively storing first and second channel component signals of the video signal contained in at least one field for time-compressing them. The first and second memories are controlled to output the time-compressed first and second channel component signals alternately. A reproducing circuit has third and fourth memories for respectively time-expanding the time-compressed first and second channel component signals contained in a reproduced signal to obtain the original two-channel component signals.

DETAILED DESCRIPTION An object of the present invention is to provide a two-channel video tape recorder capable of recording and reproducing video signals in not only a standard mode but also in a long play mode.
Another object of the present invention is to provide a two-channel video tape recorder capable of recording video signals on a magnetic tape with no guard band thereby so as to realize a high density recording of video signals.
Still another object of the present invention is to provide a two-channel video tape recorder capable of recording and reproducing two-channel video signals by only two heads.
A further object of the present invention is to provide an inexpensive two-channel video tape recorder for home use.
To achieve these objects, a video tape recorder according to the present invention comprises: a recording signal processing means for processing two-channel component signals to be a time-compressed into a one channel recordable signal by using memories; an electromagnetic conversion means including one pair of rotary magnetic heads for recording the time-compressed one channel recordable signal on a magnetic tape and for reproducing the recorded signals, each head being disposed so as to be apart by 180 degrees from each other on a circumference of a rotary cylinder which rotates one revolution during a field; a reproduced signal processing means for processing the time-compressed one channel reproduced signal to obtain the original two-channel component signals by using memories; and a memory control means for controlling the read/write address and timing of said memories.
More specifically, the recording signal processing means has first and second memories for time-compressing first and second channel component signals, respectively.
The memory control means controls the first and second memories so as to output the time-compressed first and second channel component signals alternately to obtain a one channel compressed signal which contains the time-compressed two channel component signals which occur alternately

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