Rotary head type magnetic recording/reproducing apparatus for designating video/audio signals in accordance with a predetermined distribution pattern
AssigneeKabushiki Kaisha Toshiba
InventorMasahiro Nakashika
Life of this patent
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Abstract
A rotary head type magnetic recording/playback apparatus for recording a video signal and an audio signal on multiple helical tracks formed on a magnetic tape and reproducing the video signal and audio signal therefrom. The apparatus includes a recording section for treating the helical tracks as multiple track groups each including N helical tracks, recording only a video signal on (N-K) helical tracks in each track group used as video-only tracks, and recording a video signal and an audio signal in a mixed manner on K helical tracks used as video/audio mixed tracks, and a reproducing section for reproducing the video signal and audio signal from the helical tracks in each of the track groups.
Claims11
A rotary head type magnetic recording/playback apparatus for recording a video signal and an audio signal on a plurality of inclined tracks formed on a magnetic tape with respect to a lengthwise direction thereof and for reproducing said video signal and audio signal therefrom, comprising:
- input means for receiving a video signal and an audio signal;
- recording means for treating said inclined tracks as a plurality of track groups each including at least one first inclined track and a plurality of second inclined tracks, said recording means recording only a video signal on said second inclined tracks in each of said track groups, said second inclined tracks being used as video-only tracks, and recording a video signal and an audio signal in a mixed manner on said first inclined track used as a video/audio mixed track;
- reproducing means for reproducing said video signal and audio signal from said inclined tracks in each of said track groups;
- and
- distributing means for designating the track numbers of the tracks of each of said track groups, in accordance with a predetermined distribution pattern in order to distribute the video signal to the first and second tracks corresponding to the designated track numbers, the distribution pattern being determined in accordance with an integer ratio of the amount of data of an effective video signal per video-only track to the amount of data of an effective video signal per video/audio mixed track, the integer ratio being A:B and determined such that the number S of recorded video samples per line is divisible by A (N-K)+BK, where A (N-K)+BK is designated by the variable P and K video/audio mixed tracks are provided per N tracks, the effective video signals being video signals actually recorded on said video-only track and said video/audio mixed track.
A rotary head type magnetic recording/playback apparatus for recording a video signal and an audio signal on a plurality of inclined tracks formed on a magnetic tape with respect to a lengthwise direction thereof and for reproducing said video signal and audio signal therefrom, comprising:
- input means for receiving a video signal and an audio signal;
- recording means for treating said inclined tracks as a plurality of track groups each including at least one first inclined track and a plurality of second inclined tracks, said recording means recording only a video signal on said second inclined tracks in each of said track groups, said second inclined tracks being used as video-only tracks, and recording a video signal and an audio signal in a mixed manner on said first inclined track used as a video/audio mixed track;
- reproducing means for reproducing said video signal and audio signal from said inclined tracks in each of said track groups;
- and
- distributing means for designating the track numbers of the tracks of each of said track groups, in accordance with a predetermined distribution pattern in order to distribute the video signal to the first and second tracks corresponding to the designated track numbers, the distribution pattern being determined in accordance with an integer ratio of the amount of data of an effective video signal per video-only track to the amount of data of an effective video signal per video/audio mixed track, the integer ratio being 2:1 and determined such that a 15-integer number of recorded video samples per line is divisible by 15, where one video/audio mixed track is provided per 8 tracks, effective video signals being video signals actually recorded on said video/only track and said video-audio mixed track.
Dependencies are inferred from the claim text.