U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Method and apparatus for performing speech frame encoding mode selection in a variable rate encoding system

Patent 6484138 Issued on November 19, 2002. Estimated Expiration Date: Icon_subject April 12, 2021. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

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Voice encoding and decoding device
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Voice activity detection process and means for implementing said process
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Apparatus and methods for coding, decoding, analyzing and synthesizing a signal
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Method and device for coding a voice signal
Patent #: 4677671
Issued on: 06/30/1987
Inventor: Galand ,   et al.

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Inventor

Application

No. 835258 filed on 04/12/2001

US Classes:

704/221, Pattern matching vocoders704/214, Voiced or unvoiced704/219, Linear prediction704/229Adaptive bit allocation

Examiners

Primary: Banks-Harold, Marsha D.
Assistant: McFadden, Susan

Attorney, Agent or Firm

International Class

G10L 019/00

Abstract

It is an objective of the present invention to provide an optimized method of selection of the encoding mode that provides rate efficient coding of the input speech. It is a second objective of the present invention to identify and provide a means for generating a set of parameters ideally suited for this operational mode selection. Third, it is an objective of the present invention to provide identification of two separate conditions that allow low rate coding with minimal sacrifice to quality. The two conditions are the coding of unvoiced speech and the coding of temporally masked speech. It is a fourth objective of the present invention to provide a method for dynamically adjusting the average output data rate of the speech coder with minimal impact on speech quality.

Other References

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