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1. (WO2001006490) METHOD AND APPARATUS FOR MAINTAINING A TARGET BIT RATE IN A SPEECH CODER
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/2001/006490 International Application No.: PCT/US2000/019670
Publication Date: 25.01.2001 International Filing Date: 19.07.2000
Chapter 2 Demand Filed: 16.02.2001
IPC:
G10L 19/00 (2006.01) ,G10L 19/14 (2006.01)
G PHYSICS
10
MUSICAL INSTRUMENTS; ACOUSTICS
L
SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
19
Speech or audio signal analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
G PHYSICS
10
MUSICAL INSTRUMENTS; ACOUSTICS
L
SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
19
Speech or audio signal analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
04
using predictive techniques
14
Details not provided for in groups G10L19/06-G10L19/1287
Applicants:
QUALCOMM INCORPORATED [US/US]; 577 Morehouse Drive San Diego, CA 92121-1714, US
Inventors:
MANJUNATH, Sharath; US
DEJACO, Andrew, P.; US
Agent:
WADSWORTH, Philip, R. ; Qualcomm Incorporated 5775 Morehouse Drive San Diego, CA 92121-1714, US
Priority Data:
09/356,49319.07.1999US
Title (EN) METHOD AND APPARATUS FOR MAINTAINING A TARGET BIT RATE IN A SPEECH CODER
(FR) PROCEDE ET APPAREIL DE MAINTIEN D'UN DEBIT BINAIRE CIBLE DANS UN CODEUR BINAIRE
Abstract:
(EN) 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.
(FR) L'invention concerne un procédé et un appareil de maintien d'un débit binaire cible dans un codeur vocal servant à coder une trame à un débit de codage présélectionné, calculer un débit binaire moyen de fonctionnement pour un nombre prédéfini de trames codées, soustraire le débit binaire moyen de fonctionnement à partir d'un débit binaire moyen cible prédéfini, et diviser la différence du débit de codage présélectionné. Si la valeur du quotient est négative, un nombre prédéfini de dénombrements d'occurrences possibles des valeurs seuils de performance du codeur vocal qui sont inférieures à une valeur seuil de performance actuelle est accumulé, le nombre accumulé étant supérieur à la valeur absolue du quotient. Si la valeur du quotient est positive, un nombre prédéfini de dénombrements d'occurrences possibles des valeurs seuils de performance du codeur vocal qui sont supérieures à la valeur seuil de performance actuelle est accumulé, le nombre accumulé étant supérieur au quotient.
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Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, BZ, CA, CH, CN, CR, CU, CZ, DE, DK, DM, DZ, EE, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, TZ, UA, UG, UZ, VN, YU, ZA, ZW
African Regional Intellectual Property Organization (ARIPO) (GH, GM, KE, LS, MW, MZ, SD, SL, SZ, TZ, UG, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (EPO) (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GW, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)