Method for protecting against drop-outs in a sound signal record

Details Method for protecting against drop-outs in a sound signal record Method for protecting against drop-outs in a sound signal record

1976-03-01

1978-04-18

Wolff, John H.

Dynamic magnetic information storage or retrieval

Monitoring or testing the progress of recording

H04N 578

Patent

active

040854264

ABSTRACT:
The present invention relates to methods for protecting against drop-outs in a sound signal recorded on a video-disc. It consists in recording onto a video-disc the same sound signal through the sub-carriers with a constant delay from one to the other. On reading out this video-disc, the two sub-carriers are restored to synchronism and the sub-carrier not altered is chosen for playing the sound signal.

REFERENCES:
patent: 2996576 (1961-08-01), Dolby
patent: 3409875 (1968-11-01), De Jager et al.
patent: 3526837 (1970-09-01), Zegers et al.
patent: 3781795 (1973-12-01), Zegers
patent: 3824620 (1974-07-01), Langer

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