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1. (WO2001006490) METHOD AND APPARATUS FOR MAINTAINING A TARGET BIT RATE IN A SPEECH CODER

Pub. No.:    WO/2001/006490    International Application No.:    PCT/US2000/019670
Publication Date: Fri Jan 26 00:59:59 CET 2001 International Filing Date: Thu Jul 20 01:59:59 CEST 2000
IPC: G10L 19/00
G10L 19/14
Applicants: QUALCOMM INCORPORATED
Inventors: MANJUNATH, Sharath
DEJACO, Andrew, P.
Title: METHOD AND APPARATUS FOR MAINTAINING A TARGET BIT RATE IN A SPEECH CODER
Abstract:
A method and apparatus for maintaining a target bit rate in a speech coder includes a speech coder for encoding a frame at a preselected encoding rate, computing a running average bit rate for a predefined number of encoded frames, subtracting the running average bit rate from a predefined target average bit rate, and dividing the difference of the preselected encoding rate. If the quotient value is negative, a predefined number of possible occurrence counts of speech coder performance threshold values that are less than a current performance threshold value is accumulated, the accumulated number being greater than the absolute value of the quotient. If the quotient value is positive, a predefined number of possible occurrence counts of speech coder performance threshold values that are greater than the current performance threshold value is accumulated, the accumulated number being greater than the quotient.