Dynamic information storage or retrieval – Binary pulse train information signal – Binary signal gain processing
Patent
1998-02-09
2000-09-05
Edun, Muhammad
Dynamic information storage or retrieval
Binary pulse train information signal
Binary signal gain processing
369 60, 369 47, G11B 700
Patent
active
061153419
ABSTRACT:
The present invention enables to record and reproduce a digital signal in a high quality picture mode and in a long time mode with different compression rations on a single disc-shaped recording medium.
An output from a tuner 11 is supplied to a sound/data isolation circuit 12 where a video signal, an audio signal, and an accompanying data are isolated. The video signal is supplied via an A/D conversion circuit 14, a Y/C isolation circuit 15, a color demodulation circuit 16, a pre-filter 18, and a resampling circuit 19 to a compression circuit 20 where the video signal is compressed. The audio signal is supplied via an A/D conversion circuit 34, a pre-filter 38, and a resampling circuit 39 to a compression circuit 40 where the audio signal is compressed. Here, the compression ratio is switched by a control signal which specifies the high quality picture/long time mode. The compressed video signal, the compressed audio signal, and the accompanying data is combined into a serial data by a multiplex circuit 41 and via a FIFO memory 42 recorded on a disc-shaped recording medium 100. During a reproduction, the video signal and the audio signal are outputted according to the aforementioned procedure reversed.
REFERENCES:
patent: 5363362 (1994-11-01), Maeda et al.
patent: 5915069 (1999-06-01), Nishijima
Edun Muhammad
Frommer William S.
Sony Corporation
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