Apparatus for variably compressing video and audio information w

Details Apparatus for variably compressing video and audio information w Apparatus for variably compressing video and audio information w

1992-06-05

1994-05-03

Hajec, Donald

Dynamic magnetic information storage or retrieval

Converting an analog signal to digital form for recording;...

360 48, 360 64, G11B 500, G11B 509, G11B 1514

Patent

active

053092902

ABSTRACT:
A digital video/audio recording and reproducing apparatus comprising a video signal high-efficiency encoder having a variable reduction rate, an audio signal high-efficiency encoder having a variable reduction rate, and a controller for controlling the reduction rates in both of the high-efficiency encoders. The reduction rates in both of the high-efficiency encoders are controlled in such a manner that the sum of the information amount of the video signal and that of the audio signal, after high-efficiency encoding, is maintained constant. When recording multi-channel audio signals, the reduction rates in both of the high-efficiency encoders are controlled according to the number of audio signal channels to be recorded. The high frequency components of the high-efficiency encoded video and audio signals are recorded at the end portions of recording tracks on a magnetic tape, while the low frequency components thereof are recorded in the central portion of the recording tracks.

REFERENCES:
patent: 4295154 (1981-10-01), Hata et al.
patent: 4353098 (1982-10-01), Heinz et al.
patent: 5175631 (1992-12-01), Juri et al.
The Digital Television Tape Recorder-Audio and Data Recording Aspects-SMPTE Journal, Jan. 1986.
The Art of Digital Audio Watkinson by Focal Press no date provided.
"Hoso Gijutsu" (Broadcast Technology), Jul. 1988 pp. 667-672.

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