G - Physics – 11 – B
Patent
G - Physics
11
B
352/17
G11B 5/09 (2006.01) G11B 20/10 (2006.01) G11B 20/18 (2006.01) G11B 27/036 (2006.01) G11B 27/28 (2006.01) G11B 27/032 (2006.01)
Patent
CA 1124852
ABSTRACT OF THE DISCLOSURE 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.
335219
Heaslett Alastair M.
Rudnick Paul J.
Ampex Corporation
Macrae & Co.
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