Digital audio encoding method utilizing look-up table and device

Details Digital audio encoding method utilizing look-up table and device Digital audio encoding method utilizing look-up table and device

1996-09-23

1999-01-26

Hudspeth, David R.

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704229, G10L 302

Patent

active

058648020

ABSTRACT:
A digital audio encoding method and apparatus using a look-up table includes preparing allocated bits for each frequency band of an input audio signal according to the characteristics of the input audio signal using a look-up table. A time domain audio signal is divided into a number of equal frequency bands. The addresses of the look-up table are decided according to the relative magnitudes of the audio signal characteristics acquired for the divided frequency bands. Bits corresponding to the addresses for the frequency bands are allocated and quantized. A quantized audio signal is formed from the quantized bits as a bitstream. Since the delay in operation time for the encoding apparatus is considerably reduced, real-time processing of the encoding apparatus can be realized in a hardware implementation.

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