Digest variable speed reproducing apparatus for a video cassette

Details Digest variable speed reproducing apparatus for a video cassette Digest variable speed reproducing apparatus for a video cassette

1996-07-29

1998-04-07

Sniezek, Andrew L.

Dynamic magnetic information storage or retrieval

Recording for changing duration, frequency or redundant...

360 32, 386 75, 386 76, G11B 500

Patent

active

057371393

ABSTRACT:
A digest variable speed reproducing apparatus for a video cassette recorder (VCR) including a system controller for supplying a desired variable speed data; a control signal detector for detecting a control signal written onto a VCR tape together with an audio signal during digest variable speed reproduction, from the VCR tape; a variable speed controller for supplying A/D conversion execution signal and D/A conversion execution signal and for supplying write control signal or read control signal only when a control pulse is detected by the control signal detector, in response to the variable data from the system controller; an A/D converter for converting a reproduced analog audio signal into a digital signal with a sampling rate corresponding to the variable speed data in response to the A/D conversion execution signal; a D/A converter for reconverting the digital signal read from a memory into an analog audio signal in response to the D/A conversion execution signal; and a memory for writing variable speed digital audio data output from A/D converter by a write control signal, or for reading digital audio data written by a read control signal at a speed prior to variable speed, thereby supplying the data to D/A converter.

REFERENCES:
patent: 4301480 (1981-11-01), Kitamura
patent: 4376874 (1983-03-01), Karban et al.
patent: 4392161 (1983-07-01), Ota et al.
patent: 4562488 (1985-12-01), Koyama et al.
patent: 4734795 (1988-03-01), Fukami et al.
patent: 5303093 (1994-04-01), Kawasaki

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