Method and apparatus for spectral exponent reshaping in a...

Details Method and apparatus for spectral exponent reshaping in a... Method and apparatus for spectral exponent reshaping in a...

2005-01-04

2005-01-04

Chawan, Vijay (Department: 2655)

Data processing: speech signal processing, linguistics, language

Audio signal bandwidth compression or expansion

C704S201000

Reexamination Certificate

active

06839674

ABSTRACT:
A method and apparatus for coding audio data in a frequency transform digital audio coder employing differential frequency coefficient exponent coding. Differential coding of exponents places constraints on possible values an exponent can take, which can lead to distortion in the decoded and reconstructed audio signal. The method and apparatus herein can overcome this restriction by mapping the input exponent set to a new set of values which satisfy the differential constraint as well as reducing information loss, thereby minimizing overall signal distortion due to coding restrictions.

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patent: 5581653 (1996-12-01), Todd
patent: 5623577 (1997-04-01), Fielder
patent: 5825807 (1998-10-01), Kumar

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