KR950035110A - 비터비(Viterbi) 복호법에 적응한 송신장치 - Google Patents

비터비(Viterbi) 복호법에 적응한 송신장치 Download PDF

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Publication number
KR950035110A
KR950035110A KR1019950003689A KR19950003689A KR950035110A KR 950035110 A KR950035110 A KR 950035110A KR 1019950003689 A KR1019950003689 A KR 1019950003689A KR 19950003689 A KR19950003689 A KR 19950003689A KR 950035110 A KR950035110 A KR 950035110A
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South Korea
Prior art keywords
bit sequence
section
decoding method
viterbi decoding
termination bit
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KR1019950003689A
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English (en)
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KR100262414B1 (ko
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기요끼 세끼네
도시오 가또
마나부 가와베
다꾸로 사또
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진구지 준
오끼덴끼고오교 가부시끼가이샤
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Publication of KR950035110A publication Critical patent/KR950035110A/ko
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0041—Arrangements at the transmitter end
    • H04L1/0042—Encoding specially adapted to other signal generation operation, e.g. in order to reduce transmit distortions, jitter, or to improve signal shape
    • 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
    • G10L19/012—Comfort noise or silence coding
    • 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
    • G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
    • G10L25/93—Discriminating between voiced and unvoiced parts of speech signals
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/03—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words
    • H03M13/23—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words using convolutional codes, e.g. unit memory codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/16—Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
    • H04J3/1682—Allocation of channels according to the instantaneous demands of the users, e.g. concentrated multiplexers, statistical multiplexers
    • H04J3/1688—Allocation of channels according to the instantaneous demands of the users, e.g. concentrated multiplexers, statistical multiplexers the demands of the users being taken into account after redundancy removal, e.g. by predictive coding, by variable sampling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0045—Arrangements at the receiver end
    • H04L1/0054—Maximum-likelihood or sequential decoding, e.g. Viterbi, Fano, ZJ algorithms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0059—Convolutional codes

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Health & Medical Sciences (AREA)
  • Human Computer Interaction (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Computational Linguistics (AREA)
  • Probability & Statistics with Applications (AREA)
  • Theoretical Computer Science (AREA)
  • Artificial Intelligence (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Error Detection And Correction (AREA)

Abstract

[목적] 비터비복호법을 이용하는 송신장치에 있어서, 전송 레이트를 저하시키지 않고 또 에러 정정을 열화시키지 않도록 한다.
[구성] VAD/DTX 제어부(101)는 입력 데이터로부터 음성검출을 행하며, 스위치(103)에 의해, 무음구간의 선두에 종결부호계열 발생기(102)가 발생한 종결부호계열을 송신하고, 그 후는 무성시의 접점에 접속하고 비전송구간으로 한다. 이상의 데이터를 콘벌루션부호기(104)에 의해 부호화 한다.

Description

비터비(Viterbi) 복호법에 적응한 송신장치
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명의 송신장치의 구성도, 제2도는 본 발명의 종결비트계열의 삽입방법의 설명도.

Claims (1)

  1. 음성 데이터중의 무성구간을 검출하고, 그 구간의 송신파워를 제로로 하든가, 또는, 낮게하는 음성검출 불연속 송신제어수단과, 에러 정정을 위하여 콘벌루션부호화를 행하는 콘벌루션부호기와, 비터비 부호법을 위한 종결비트계열을 발생하는 종결비트계열 발생수단과, 상기 음성 데이타와 상기 종결비트계열을 전환하여 상기 콘벌루션부호기로 보내는 스위치 수단을 구비하고, 상기 음성검출 불연속 송신제어수단은, 상기 스위치수단을 음성 데이터의 비송신 구간에 상기 종결비트계열을 삽입하도록 제어하는 것을 특징으로 하는 비터비복호법에 적응한 송신장치.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019950003689A 1994-04-28 1995-02-24 비터비 복호법에 적응한 송신장치 KR100262414B1 (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP94-91914 1994-04-28
JP06091914A JP3090842B2 (ja) 1994-04-28 1994-04-28 ビタビ復号法に適応した送信装置

Publications (2)

Publication Number Publication Date
KR950035110A true KR950035110A (ko) 1995-12-30
KR100262414B1 KR100262414B1 (ko) 2000-08-01

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KR1019950003689A KR100262414B1 (ko) 1994-04-28 1995-02-24 비터비 복호법에 적응한 송신장치

Country Status (5)

Country Link
US (1) US5694429A (ko)
EP (1) EP0680034B1 (ko)
JP (1) JP3090842B2 (ko)
KR (1) KR100262414B1 (ko)
DE (1) DE69527470T2 (ko)

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FI961567A (fi) * 1996-04-10 1997-10-11 Nokia Telecommunications Oy Kohinasalpa analogisessa matkaviestinjärjestelmässä
CA2208660C (en) 1996-07-19 2002-09-17 Takashi Suzuki Data transmission device
US5954834A (en) * 1996-10-09 1999-09-21 Ericsson Inc. Systems and methods for communicating desired audio information over a communications medium
DE19716862A1 (de) * 1997-04-22 1998-10-29 Deutsche Telekom Ag Sprachaktivitätserkennung
DE19730984A1 (de) * 1997-07-18 1999-02-11 Siemens Ag Funk-Übertragungsverfahren und Schnurlostelefon, insbesondere für DECT-Standard
KR100387078B1 (ko) * 1997-07-30 2003-10-22 삼성전자주식회사 대역확산통신시스템의심볼천공및복구장치및방법
US5897613A (en) * 1997-10-08 1999-04-27 Lucent Technologies Inc. Efficient transmission of voice silence intervals
US7072832B1 (en) 1998-08-24 2006-07-04 Mindspeed Technologies, Inc. System for speech encoding having an adaptive encoding arrangement
US6256606B1 (en) 1998-11-30 2001-07-03 Conexant Systems, Inc. Silence description coding for multi-rate speech codecs
DE10055658B4 (de) * 2000-11-10 2004-04-29 Infineon Technologies Ag Verfahren und Schaltung zur Synchronisation eines Empfängers für ein faltungskodiertes Empfangssignal
US6980838B2 (en) * 2001-05-10 2005-12-27 Motorola, Inc. Control channel to enable a low power mode in a wideband wireless communication system
GB2396271B (en) * 2002-12-10 2005-08-10 Motorola Inc A user terminal and method for voice communication
US7877674B2 (en) * 2006-07-25 2011-01-25 Broadcom Corporation Method and system for redundancy-based decoding of voice content in a wireless LAN system
CN100555414C (zh) * 2007-11-02 2009-10-28 华为技术有限公司 一种dtx判决方法和装置
CN101335000B (zh) 2008-03-26 2010-04-21 华为技术有限公司 编码的方法及装置
JP7071579B1 (ja) * 2021-10-27 2022-05-19 アルインコ株式会社 デジタル無線送信装置及びデジタル無線通信システム

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CA2020899C (en) * 1989-08-18 1995-09-05 Nambirajan Seshadri Generalized viterbi decoding algorithms
JP2877375B2 (ja) * 1989-09-14 1999-03-31 株式会社東芝 可変レートコーデックを用いたセル転送方式
US5659569A (en) * 1990-06-25 1997-08-19 Qualcomm Incorporated Data burst randomizer
GB2256351B (en) * 1991-05-25 1995-07-05 Motorola Inc Enhancement of echo return loss
JP2776094B2 (ja) * 1991-10-31 1998-07-16 日本電気株式会社 可変変調通信方法
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US5559832A (en) * 1993-06-28 1996-09-24 Motorola, Inc. Method and apparatus for maintaining convergence within an ADPCM communication system during discontinuous transmission

Also Published As

Publication number Publication date
DE69527470T2 (de) 2003-03-20
EP0680034B1 (en) 2002-07-24
EP0680034A1 (en) 1995-11-02
JP3090842B2 (ja) 2000-09-25
US5694429A (en) 1997-12-02
KR100262414B1 (ko) 2000-08-01
JPH07297782A (ja) 1995-11-10
DE69527470D1 (de) 2002-08-29

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