Method and apparatus employing an improved format for recording

Details Method and apparatus employing an improved format for recording Method and apparatus employing an improved format for recording

1978-11-03

1980-07-08

Atkinson, Charles E.

Excavating

360 53, 371 51, G06F 1112, G11B 2700

Patent

active

042119979

ABSTRACT:
An audio signal is sampled, quantized and the values are stored in a specific digital data block/sub-block format on alternate tracks of a recording medium. The block/sub-block format provides an inherent simplification of error correction techniques, and consists of dividing the digital audio data into groups of digital words, and recording alternate words on separate tracks in the medium. Cyclic redundancy check characters, synchronization, and parity information are selectively interspersed with the data to define sub-blocks which in turn are combined into separate blocks of the block/sub-block arrangement. On reproduce, any errors, dropouts, etc., are detected and corrected or concealed to reconstitute the original audio signal. Editing is facilitated by the separated block arrangement which allows entering and exiting the record mode without destroying any data.

REFERENCES:
patent: 3774154 (1973-11-01), Devore et al.
patent: 4052698 (1977-10-01), Ragle
patent: 4143406 (1979-03-01), Tsuiki et al.
patent: 4145683 (1979-03-01), Brookhart
patent: 4146099 (1979-03-01), Matsushima et al.

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