Method of efficiently recording an audio signal in semiconductor

Details Method of efficiently recording an audio signal in semiconductor Method of efficiently recording an audio signal in semiconductor

1996-09-18

1998-05-12

Hafiz, Tario R.

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704206, 704203, G10L 302, G10L 900

Patent

active

057522219

ABSTRACT:
An audio signal is recorded in a semiconductor memory in a plurality of hierarchical levels, with the lowest level sufficing for reproduction with a certain reduced degree of fidelity. Successively higher hierarchical levels provide successively greater fidelity when reproduced. When the memory has been determined to have reached maximum capacity recording continues by overwriting the highest hierarchical level of data currently stored in the memory with lower hierarchical levels of new data. A code is recorded in the memory, indicating the number of hierarchical levels recorded therein, for subsequent reproduction. The audio signal can furthermore be recorded in variable-length frames and reproduced at high speed by reading every N-th frame, N being a positive integer, or by reading only frames having at least a certain minimum length.

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