KR920019106A - 디지탈신호 부호화장치 - Google Patents

디지탈신호 부호화장치 Download PDF

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Publication number
KR920019106A
KR920019106A KR1019920002727A KR920002727A KR920019106A KR 920019106 A KR920019106 A KR 920019106A KR 1019920002727 A KR1019920002727 A KR 1019920002727A KR 920002727 A KR920002727 A KR 920002727A KR 920019106 A KR920019106 A KR 920019106A
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KR
South Korea
Prior art keywords
digital signal
signal coding
coding device
time axis
transient
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KR1019920002727A
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English (en)
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KR100241498B1 (ko
Inventor
요시히또 후지와라
Original Assignee
오오가 노리오
소니 가부시끼기가이샤
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Publication of KR920019106A publication Critical patent/KR920019106A/ko
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Publication of KR100241498B1 publication Critical patent/KR100241498B1/ko

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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G7/00—Volume compression or expansion in amplifiers
    • H03G7/007—Volume compression or expansion in amplifiers of digital or coded signals
    • 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
    • G10L19/02—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 spectral analysis, e.g. transform vocoders or subband vocoders
    • G10L19/032—Quantisation or dequantisation of spectral components
    • 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
    • G10L19/002—Dynamic bit allocation
    • 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
    • G10L19/02—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 spectral analysis, e.g. transform vocoders or subband vocoders
    • G10L19/0212—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 spectral analysis, e.g. transform vocoders or subband vocoders using orthogonal transformation
    • 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
    • G10L19/02—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 spectral analysis, e.g. transform vocoders or subband vocoders
    • G10L19/022—Blocking, i.e. grouping of samples in time; Choice of analysis windows; Overlap factoring
    • G10L19/025—Detection of transients or attacks for time/frequency resolution switching

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Computational Linguistics (AREA)
  • Human Computer Interaction (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Analogue/Digital Conversion (AREA)

Abstract

내용 없음

Description

디지탈신호 부호화장치
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명의 일실시예인 디지탈신호 부호화장치의 개략 구성을 나타낸 블록회로도,
제2도는 본 발명의 실시예 장치에 있어서의 분할대역 및 각대역에서의 시간축 방향의 블록화의 구체예를 나타낸 도면,
제3도는 제5도 장치의 허용 잡음 산출회로의 구체예를 나타낸 블록회로도.

Claims (1)

  1. 입력 디지탈신호를 복수의 주파대역으로 분할하고, 분할된 각 대역마다 시간축 방향으로 블록화하여 각각 직교변환하고, 이들의 직교변환된 각각의 블록마다 부호화 비트수를 할당하여 부호화를 행하는 디지탈 신호부호화장치에 있어서, 상기 직교변환에 앞서서 시간축상의 신호의 과도성을 검출하고, 이 검출된 과도성에 따라 상기 각 블록마다의 할당비트수를 변경하는 것을 특징으로 하는 디지탈신호 부호화장치.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019920002727A 1991-03-30 1992-02-22 디지털신호 부호화장치 KR100241498B1 (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP91-092739 1991-03-30
JP03092739A JP3134338B2 (ja) 1991-03-30 1991-03-30 ディジタル音声信号符号化方法

Publications (2)

Publication Number Publication Date
KR920019106A true KR920019106A (ko) 1992-10-22
KR100241498B1 KR100241498B1 (ko) 2000-02-01

Family

ID=14062789

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019920002727A KR100241498B1 (ko) 1991-03-30 1992-02-22 디지털신호 부호화장치

Country Status (3)

Country Link
US (1) US5268685A (ko)
JP (1) JP3134338B2 (ko)
KR (1) KR100241498B1 (ko)

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Also Published As

Publication number Publication date
JPH04304029A (ja) 1992-10-27
US5268685A (en) 1993-12-07
KR100241498B1 (ko) 2000-02-01
JP3134338B2 (ja) 2001-02-13

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