BR9813482A - Codec de áudio com agc controlado por um vocoder - Google Patents

Codec de áudio com agc controlado por um vocoder

Info

Publication number
BR9813482A
BR9813482A BR9813482-5A BR9813482A BR9813482A BR 9813482 A BR9813482 A BR 9813482A BR 9813482 A BR9813482 A BR 9813482A BR 9813482 A BR9813482 A BR 9813482A
Authority
BR
Brazil
Prior art keywords
digital
audio signal
interface circuit
gain
vocoder
Prior art date
Application number
BR9813482-5A
Other languages
English (en)
Inventor
Wade L Heimbigner
James A Hutchison Iv
Louis D Oliveira
Original Assignee
Qualcomm Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qualcomm Inc filed Critical Qualcomm Inc
Publication of BR9813482A publication Critical patent/BR9813482A/pt

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals 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
    • G10L19/04—Speech or audio signals 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 using predictive techniques
    • G10L19/16—Vocoder architecture
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/12—Analogue/digital converters
    • H03M1/18—Automatic control for modifying the range of signals the converter can handle, e.g. gain ranging
    • H03M1/181—Automatic control for modifying the range of signals the converter can handle, e.g. gain ranging in feedback mode, i.e. by determining the range to be selected from one or more previous digital output values
    • H03M1/183—Automatic control for modifying the range of signals the converter can handle, e.g. gain ranging in feedback mode, i.e. by determining the range to be selected from one or more previous digital output values the feedback signal controlling the gain of an amplifier or attenuator preceding the analogue/digital converter
    • H03M1/185—Automatic control for modifying the range of signals the converter can handle, e.g. gain ranging in feedback mode, i.e. by determining the range to be selected from one or more previous digital output values the feedback signal controlling the gain of an amplifier or attenuator preceding the analogue/digital converter the determination of the range being based on more than one digital output value, e.g. on a running average, a power estimation or the rate of change

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Computational Linguistics (AREA)
  • Signal Processing (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Analogue/Digital Conversion (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Dc Digital Transmission (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)

Abstract

Patente de Invenção: CODEC DE áUDIO COM AGC CONTROLADO POR UM VOCODER. Um processador para banda de áudio e um método e circuito para controlar seu ganho. O processador para banda de áudio compreende um primeiro amplificador de ganho variável (202) para receber um sinal de áudio analógico; um conversor analógico para digital (204) para converter o sinal de áudio analógico para um sinal de áudio digital; e um circuito de interface (206) para codificar o sinal de áudio digital. O circuito de interface (206) também dispõe o sinal de áudio digital em uma seq³ência de quadros de transmissão codificados e recebe uma seq³ência de quadros de recepção codificados, cada quadro de recepção compreendendo um número predeterminado de bits de dados de sinal de áudio digital e um número predeterminado de bits de controle de ganho digital. O circuito de interface (206) também ajusta um nível de ganho do primeiro amplificador de ganho variável em resposta aos bits de controle de ganho digital. Em outra modalidade, o processador para banda de áudio compreende também um segundo amplificador de ganho variável (202) e o circuito de interface ajusta um nível de ganho do segundo amplificador de ganho variável em resposta aos bits de controle de ganho digital.
BR9813482-5A 1997-12-12 1998-12-14 Codec de áudio com agc controlado por um vocoder BR9813482A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/989,743 US6233554B1 (en) 1997-12-12 1997-12-12 Audio CODEC with AGC controlled by a VOCODER
PCT/US1998/026532 WO1999030421A1 (en) 1997-12-12 1998-12-14 Audio codec with agc controlled by a vocoder

Publications (1)

Publication Number Publication Date
BR9813482A true BR9813482A (pt) 2000-11-14

Family

ID=25535422

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9813482-5A BR9813482A (pt) 1997-12-12 1998-12-14 Codec de áudio com agc controlado por um vocoder

Country Status (16)

Country Link
US (1) US6233554B1 (pt)
EP (1) EP1038358B1 (pt)
JP (1) JP4298160B2 (pt)
KR (1) KR100610134B1 (pt)
CN (1) CN1130023C (pt)
AR (1) AR015495A1 (pt)
AU (1) AU744770B2 (pt)
BR (1) BR9813482A (pt)
CA (1) CA2313219C (pt)
DE (1) DE69827162T2 (pt)
ES (1) ES2230736T3 (pt)
HK (1) HK1036166A1 (pt)
IL (1) IL136546A0 (pt)
NO (1) NO326176B1 (pt)
WO (1) WO1999030421A1 (pt)
ZA (1) ZA9811353B (pt)

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TW550948B (en) * 2001-07-04 2003-09-01 Leadtek Research Inc Audio/video IP camcorder
DE10216921A1 (de) * 2002-04-15 2003-10-23 Bosch Gmbh Robert Verfahren und Vorrichtung zum Auffüllen von Datenabschnitten sowie Bussystem
US7454331B2 (en) * 2002-08-30 2008-11-18 Dolby Laboratories Licensing Corporation Controlling loudness of speech in signals that contain speech and other types of audio material
MXPA05012785A (es) * 2003-05-28 2006-02-22 Dolby Lab Licensing Corp Metodo, aparato y programa de computadora para el calculo y ajuste de la sonoridad percibida de una senal de audio.
KR100827226B1 (ko) * 2003-12-01 2008-05-07 삼성전자주식회사 아날로그 음향 신호를 디지털 데이터로 변환하는 장치 및방법
JP4629971B2 (ja) * 2003-12-11 2011-02-09 株式会社半導体エネルギー研究所 非直線ａ／ｄ変換されたデジタル信号対応のｄ／ａ変換回路及びそれを内蔵した音声信号処理回路及び表示装置
US8199933B2 (en) 2004-10-26 2012-06-12 Dolby Laboratories Licensing Corporation Calculating and adjusting the perceived loudness and/or the perceived spectral balance of an audio signal
MX2007005027A (es) 2004-10-26 2007-06-19 Dolby Lab Licensing Corp Calculo y ajuste de la sonoridad percibida y/o el balance espectral percibido de una senal de audio.
BRPI0622303B1 (pt) * 2005-04-18 2016-03-01 Basf Se copolímeros cp na forma de um polímero obtido por polimerização com radical de pelo menos três monômeros m diferentes monoetilenicamente insaturados
EP2002426B1 (en) * 2006-04-04 2009-09-02 Dolby Laboratories Licensing Corporation Audio signal loudness measurement and modification in the mdct domain
TWI517562B (zh) 2006-04-04 2016-01-11 杜比實驗室特許公司 用於將多聲道音訊信號之全面感知響度縮放一期望量的方法、裝置及電腦程式
WO2007127023A1 (en) 2006-04-27 2007-11-08 Dolby Laboratories Licensing Corporation Audio gain control using specific-loudness-based auditory event detection
BRPI0717484B1 (pt) 2006-10-20 2019-05-21 Dolby Laboratories Licensing Corporation Método e aparelho para processar um sinal de áudio
US8521314B2 (en) * 2006-11-01 2013-08-27 Dolby Laboratories Licensing Corporation Hierarchical control path with constraints for audio dynamics processing
ATE535906T1 (de) * 2007-07-13 2011-12-15 Dolby Lab Licensing Corp Tonverarbeitung mittels auditorischer szenenanalyse und spektraler asymmetrie
EP2242046A4 (en) * 2008-01-11 2013-10-30 Nec Corp SYSTEM, APPARATUS, METHOD AND PROGRAM FOR CONTROL OF SIGNAL ANALYSIS, SIGNAL ANALYSIS AND SIGNAL CONTROL
EP2261894A4 (en) * 2008-03-14 2013-01-16 Nec Corp SIGNAL ANALYSIS / CONTROL SYSTEM AND METHOD, SIGNAL CONTROL DEVICE AND METHOD, AND PROGRAM
JP5773124B2 (ja) * 2008-04-21 2015-09-02 日本電気株式会社 信号分析制御及び信号制御のシステム、装置、方法及びプログラム
US8140342B2 (en) * 2008-12-29 2012-03-20 Motorola Mobility, Inc. Selective scaling mask computation based on peak detection
CN102568480A (zh) * 2010-12-27 2012-07-11 深圳富泰宏精密工业有限公司 双模手机语音传输系统
CN102148607B (zh) * 2011-04-15 2016-03-30 昆腾微电子股份有限公司 用于放大器的增益控制装置和方法、电话机
US9124365B2 (en) * 2013-03-15 2015-09-01 Cellco Partnership Enhanced mobile device audio performance
US9425757B2 (en) * 2013-05-15 2016-08-23 Infineon Technologies Ag Apparatus and method for controlling an amplification gain of an amplifier, and a digitizer circuit and microphone assembly
CN109785851B (zh) * 2013-09-12 2023-12-01 杜比实验室特许公司 用于各种回放环境的动态范围控制
US9620134B2 (en) * 2013-10-10 2017-04-11 Qualcomm Incorporated Gain shape estimation for improved tracking of high-band temporal characteristics
GB2547459B (en) * 2016-02-19 2019-01-09 Imagination Tech Ltd Dynamic gain controller
GB2566164B (en) * 2016-02-19 2020-02-19 Imagination Tech Ltd Dynamic gain controller
CN106023998B (zh) * 2016-05-27 2019-12-13 北京视觉世界科技有限公司 摄像头音频输入装置、去噪方法和摄像头
CN111583945B (zh) * 2020-04-30 2023-04-25 抖音视界有限公司 用于处理音频的方法、装置、电子设备和计算机可读介质
CN117793077A (zh) * 2024-02-23 2024-03-29 中国电子科技集团公司第三十研究所 通信系统及其软融硬音量调节方法

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Also Published As

Publication number Publication date
CN1130023C (zh) 2003-12-03
HK1036166A1 (en) 2001-12-21
ES2230736T3 (es) 2005-05-01
KR100610134B1 (ko) 2006-08-09
NO326176B1 (no) 2008-10-13
AU1725499A (en) 1999-06-28
DE69827162D1 (de) 2004-11-25
EP1038358B1 (en) 2004-10-20
JP4298160B2 (ja) 2009-07-15
US6233554B1 (en) 2001-05-15
AR015495A1 (es) 2001-05-02
JP2001526414A (ja) 2001-12-18
NO20002955D0 (no) 2000-06-09
IL136546A0 (en) 2001-06-14
WO1999030421A1 (en) 1999-06-17
CA2313219C (en) 2007-05-29
DE69827162T2 (de) 2005-10-20
ZA9811353B (en) 2000-10-11
EP1038358A1 (en) 2000-09-27
CN1291377A (zh) 2001-04-11
AU744770B2 (en) 2002-03-07
KR20010032999A (ko) 2001-04-25
NO20002955L (no) 2000-08-10
CA2313219A1 (en) 1999-06-17

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Legal Events

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B08F Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette]

Free format text: REFERENTE A 13A ANUIDADE.

B08K Patent lapsed as no evidence of payment of the annual fee has been furnished to inpi [chapter 8.11 patent gazette]

Free format text: NAO APRESENTADA A GUIA DE CUMPRIMENTO DE EXIGENCIA. REFERENTE A 13A ANUIDADE.