Recording system for a multichannel record disc

Details Recording system for a multichannel record disc Recording system for a multichannel record disc

1975-09-04

1977-08-30

Tupper, Robert S.

1791001TD, 179 1GQ, 1791004C, G11B 300, G11B 374

Patent

active

040456218

ABSTRACT:
A multichannel record disc recording system uses two channels of direct wave sum signals and two channels of angle-modulated wave difference signals which are multiplexed and recorded in one sound groove on a record disc. During recording, a tracing distortion compensation means imparts a reverse distortion which cancels the tracing distortion produced, with respect to the sum signals, during reproducing. Since the compensation means is in the transmission paths of the direct wave sum signals, the reverse distortion is only imparted to the direct wave sum signals. Also, phase correction signals are provided.

REFERENCES:
patent: 3229048 (1966-01-01), Fox
patent: 3403233 (1968-09-01), Cooper
patent: 3772467 (1973-11-01), Ohwaki
patent: 3803367 (1974-04-01), Takahashi
patent: 3839602 (1974-10-01), Takahashi
"Tracing Distortion -- Its Cause and Correction in Stereodisk Recording Systems" by Fox and Woodward; Journal of the Audio Engineering Society; Oct. 1963, vol. 11, No. 4; pp. 294-301.

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