Browse Prior Art Database

Extended Audio Video System

IP.com Disclosure Number: IPCOM000086602D
Original Publication Date: 1976-Oct-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 2 page(s) / 61K

Publishing Venue

IBM

Related People

Ludeman, CP: AUTHOR

Abstract

In the presentation of audio-visual material, two general arrangements have been utilized. The audio and video may be combined in a simple track as in video tape, which wastes a large amount of tape when repetitive video scenes, animation or still scenes are shown with the audio, or separate video slides may be used with audio tapes which presents problems in coordination.

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Extended Audio Video System

In the presentation of audio-visual material, two general arrangements have been utilized. The audio and video may be combined in a simple track as in video tape, which wastes a large amount of tape when repetitive video scenes, animation or still scenes are shown with the audio, or separate video slides may be used with audio tapes which presents problems in coordination.

The video disc shown above can be used to present video information along with a coordinated, extended audio presentation. The record disc 1 is provided with alternate tracks of video and audio information and, normally, one video track will record one frame. The audio track can record one control block 2 and a number of blocks 3 of audio data in a compressed format. For example, each block 3 may contain about 400 audio samples recorded in six-bit pulse-code modulation, which will provide sufficient audio for the time of one disc revolution. A read head 4, for the video track and a read head 5 for the audio track are mounted on a carrier 6 for movement by a servo drive 7 to any selected pair of disc tracks.

The video data read out from a track by head 4 is passed to a video amplifier 8 and a video and audio monitor 9 for visual presentation along with any audio which may be modulated with it or may accompany it. The information from the audio track head 5 is sent to control and timing logic circuit 11, which will store the data contained in control block 2 and will t...