Method and apparatus for low bit rate encoding and decoding

Details Method and apparatus for low bit rate encoding and decoding Method and apparatus for low bit rate encoding and decoding

2005-12-21

2010-11-16

Sked, Matthew J (Department: 2626)

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

C704S200100, C704S206000, C704S226000, C704S227000

Reexamination Certificate

active

07835907

ABSTRACT:
An apparatus and method of low bit rate encoding and reproducing. The method includes transforming input audio signals in a time domain into spectral signals in a frequency domain, extracting important-spectrum components from the spectral signals in the frequency domain, and quantizing the important-spectrum components, extracting residual-spectrum components other than the important-spectrum components from the spectral signals in the frequency domain, and calculating and quantizing a noise level of the residual-spectrum components, and encoding the quantized important-spectrum components and the quantized noise level losslessly, and outputting encoded bitstreams.

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