Patent
Method and apparatus for compensating for tape jitter during recording and reproducing of a video signal and PCM audio signal
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TLDR
In this paper, an information signal consisting of a video signal and an audio signal in a plurality of successive tracks on a magnetic tape is recorded and reproduced. But the recording and reproducing of the information signal is performed separately.Abstract:
Apparatus for recording and reproducing an information signal comprised of a video signal and an audio signal in a plurality of successive tracks on a magnetic tape, includes a recording section comprised of a PCM processor which converts the audio signal to a PCM audio signal and compresses the same, a dummy signal generator for compensating for tape jitter by generating a dummy signal and supplying the same to the PCM processor where the dummy signal is added both before and after each portion of the compressed PCM audio signal to be recorded in an overscan section of each track, and a magnetic head assembly which records the video signal in a main section of each track and each portion of the compressed PCM audio signal and dummy signal added thereto in the overscan section of each track; and a reproducing section comprised of a magnetic head assembly which scans the tracks to reproduce the information signal recorded therein, a switch assembly which separates the video signal reproduced from the main section of each track and the PCM audio signal reproduced from the overscan section of each track; a PCM processor which converts the PCM audio signal to the original analog audio signal and a timing signal generator for compensating for tape jitter by enabling the PCM processor only during a period slightly greater than the period of the PCM audio signal recorded in the overscan section of each track.read more
Citations
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References
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Patent
Helical scan video tape recorder for recording video and audio signals on contiguous tracks
TL;DR: In this paper, a magnetic recording and reproducing system of the type where a plurality of rotating magnetic heads record the video signal on a magnetic tape as tracks which are inclined at an angle relative to the direction of travel of the magnetic tape, is described.
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Method of storing digital color television signals on magnetic tape
TL;DR: In this paper, the video and audio information are recorded along at least one track of the tape, which track, in the preferred embodiment of the invention, consists of discontinuous track segments oblique to the longitudinal axis of the video.
Patent
Magnetic recording and/or reproducing system for television and audio signal
TL;DR: In this paper, a two speed or multi-speed video tape recorder of the conventional helical scan type is presented, in which the audio signal is capable of being recorded as a time compressed signal at one end of each helical video scan, or alternatively, in conventional longitudinal fashion by means of a stationary magnetic head engaging one edge of the tape.
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Method and apparatus for recording digitally coded television signals
TL;DR: In this article, audio signals of a plurality of channels are stored blockwise in each channel and then recorded blockwise by repeating channel sequence in similarly situated portions of successive oblique tracks in which are also recorded concurrent video signals.
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Video signal decoding circuit
Yoshizumi Eto,Yasuhiro Hirano +1 more
TL;DR: In this paper, a video signal decoding circuit produces quasi-code signals when the lack of clock signal is detected, in order to prevent deterioration of a reproduced picture quality due to lack of the clock signals.