Coding system for digital audio disc record

Details Coding system for digital audio disc record Coding system for digital audio disc record

1982-08-17

1984-12-11

McElheny, Jr., Donald E.

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

369 43, G11B 2110

Patent

active

044882785

ABSTRACT:
Digital audio data to be recorded in a pseudo-video format on a disc record is applied to an error check encoder that encodes each line of data with an error check code. The encoder is preset to an initial state corresponding to a recording track number prior to encoding each data line. The track number is changed periodically during recording whereby track information is conveyed by the form of the error check code without requiring additional bits of information in the data lines. Upon playback of the disc, the encoded data is applied to an error check decoder that is preset to an initial state corresponding to an expected track number. Upon decoding, errors in the recovered data are corrected and the recorded track number is recovered. The expected and recovered track numbers are compared to provide a track error correction signal whereby tracking errors may be corrected on a line-by-line basis within each pseudo-video field without need for additional bits in the recorded data.

REFERENCES:
patent: 4138694 (1979-02-01), Doi et al.
patent: 4159480 (1979-06-01), Tachi
patent: 4224642 (1980-09-01), Mawatari et al.
patent: 4282551 (1981-08-01), Kanazawa et al.
patent: 4313134 (1979-01-01), Rustman et al.
patent: 4375101 (1983-02-01), Cerracchio
patent: 4426698 (1984-01-01), Pargee, Jr.

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