Method and apparatus for encoding digital signal method and appa

Details Method and apparatus for encoding digital signal method and appa Method and apparatus for encoding digital signal method and appa

1997-11-13

1999-05-04

Hsu, Alpus H.

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

341 67, 348403, 348421, 358433, G10L 900

Patent

active

058999701

ABSTRACT:
An encoding apparatus for encoding a digital signal and a decoding apparatus for decoding the encoded signal. This encoding apparatus comprises a time series sample buffer for dividing an input signal into blocks, an orthogonal transform encoding section for transforming the signals every blocks into spectrum signals, and an entropy encoding section for implementing variable length encoding to all or a portion of the spectrum signals every blocks. At the entropy encoding section, there are provided an upper limit setting circuit for setting upper limit in the number of bits per each block of a signal encoded and outputted, and a bit number judging circuit for stopping outputting of a portion of spectrum signals in a block or blocks where the number of bits above the upper limit is required. The number of bits per each block is caused to have upper limit to stop recording or transmission of a portion of spectrum signals in a block or blocks where the number of bits above the upper limit is required. Thus, quantity of information caused to undergo encoding, recording or transmission and decoding can be reduced.

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Hoogendoorn, A., "Digital Compact Cassette", Proceedings of the IEE, vol. 82, No. 10, Oct. 1994.

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