Process for synchronizing computer video with independent audio

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Other Related Categories

364569, 364410, 358149, 358300, G06F 3153, G06F 1544, G11B 3100

Type

Patent

Status

active

Patent number

046412530

Description

ABSTRACT:
A process for use of a low-cost personal computer to display video images which provide the effect of animation in synchronization with an audio program, such as voice or environmental sounds, originating independently of the computer. The computer is provided with a data base including intervals between recorded cue tones preceding the audio program, and intervals between video events to be synchronized with the audio program, all such original intervals corresponding to the original recording transport speed of the audio program. While consumer audio playback devices operate at a stable playback transport speed, it is seldom precisely the same as the original recording speed. During playback, the viewer indicates playback intervals between cue tones, for instance by tapping a key of the computer keyboard whenever a cue tone is played. The computer times the actual playback intervals, calculates a ratio R of the playback interval divided by the recording interval, and then executes the video events at playback intervals equal to their original intervals multiplied by R.

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patent: 4405984 (1983-09-01), Siegel et al.
patent: 4445187 (1984-04-01), Best
patent: 4471464 (1984-09-01), Mayer et al.
patent: 4475228 (1984-10-01), Vickers
patent: 4569019 (1986-02-01), DiOrio et al.
patent: 4569026 (1986-02-01), Best

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