Method, apparatus and recording medium for a coder with a spectr

Details Method, apparatus and recording medium for a coder with a spectr Method, apparatus and recording medium for a coder with a spectr

1995-06-08

1998-04-07

MacDonald, Allen R.

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704209, 704299, 704230, 704269, G01L 704

Patent

active

057377189

ABSTRACT:
A method for encoding the information is provided which realizes a high encoding efficiency especially for tonal acoustic signals without lowering the sound quality. An acoustic signal from a terminal is transformed by a transform circuit into spectral signals which are then normalized and quantized by a signal component encoding circuit for encoding from one encoding unit to another. The encoding unit configuration is selected by an encoding unit configuration decision circuit from plural encoding unit configurations depending upon the shape of distribution of the spectral components. An encoding unit of narrow low bandwidth is selected for a tonal signal.

REFERENCES:
patent: 5583967 (1996-12-01), Akagiri

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