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KR960030557A - Audio signal encoding circuit - Google Patents

Audio signal encoding circuit Download PDF

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Publication number
KR960030557A
KR960030557A KR1019950001490A KR19950001490A KR960030557A KR 960030557 A KR960030557 A KR 960030557A KR 1019950001490 A KR1019950001490 A KR 1019950001490A KR 19950001490 A KR19950001490 A KR 19950001490A KR 960030557 A KR960030557 A KR 960030557A
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KR
South Korea
Prior art keywords
audio signal
encoding
decoding
output
loss
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Application number
KR1019950001490A
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Korean (ko)
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KR0176640B1 (en
Inventor
허재훈
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김광호
삼성전자 주식회사
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Priority to KR1019950001490A priority Critical patent/KR0176640B1/en
Publication of KR960030557A publication Critical patent/KR960030557A/en
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Publication of KR0176640B1 publication Critical patent/KR0176640B1/en

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    • 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
    • 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
    • G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/003—Changing voice quality, e.g. pitch or formants

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Computational Linguistics (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Human Computer Interaction (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Quality & Reliability (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

1. 청구범위에 기재된 발명이 속한 기술분야1. TECHNICAL FIELD OF THE INVENTION

오디오신호의 부호화회로.Audio signal coding circuit.

2. 발명이 해결하려고 하는 기술적 과제2. The technical problem to be solved by the invention

압축률을 올리기 위해 음향심리학에서 밝혀진 마스킹 현상과 가청한계를 이용하여 미세한 신호성분들을 제거할 경우 보통 수준의 청자들의 귀를 만족시킬 수 있지만, 가청한계나 마스킹 곡선보다 더 낮은 레벨의 소리도 들을 수 없어 예민한 청각을 가진 고급 사용자들에겐 불만이 상존하는 방법이라 할 수 있었다.The use of masking phenomena and audible limits found in psychoacoustics to increase compression rates can satisfy the average listener's ears, but can't hear sounds below the audible limit or masking curve. It was a way of dissatisfaction for advanced users with sensitive hearings.

3. 발명의 해결방법의 요지3. Summary of Solution to Invention

오디오신호 부호화회로에 있어서, 입력 디지탈 오디오신호를 소정의 정보손실을 감소하면서 엔코딩하기 위한 제1엔코딩부와, 상기 제1엔코딩부의 출력을 소정의 정보손실을 감수하면서 디코딩하기 위한 제1디코딩부와, 상기 제1디코딩부에서 출력된 오디오신호와 상기 입력 디지탈 오디오신호의 차를 구하기 위한 감산부와, 상기 감산결과를 정보의 손실없이 엔코딩하기 위한 제2엔코딩부와, 상기 제1엔코딩부에서 출력된 오디오신호와 제2엔코딩부에서 출력된 오디오신호를 소정의 포맷에 따라 선택적으로 출력하기 위한 선택부로 구성된다.An audio signal encoding circuit comprising: a first encoding section for encoding an input digital audio signal with a predetermined loss of information, a first decoding section for decoding the output of the first encoding section with a predetermined loss of information; A subtractor for obtaining a difference between the audio signal output from the first decoder and the input digital audio signal, a second encoder for encoding the subtraction result without loss of information, and an output from the first encoder And a selection unit for selectively outputting the audio signal and the audio signal output from the second encoding unit according to a predetermined format.

4. 발명의 중요한 용도4. Important uses of the invention

업무용 녹음/재생기기, 또는 고음질을 위한 고급 음향기기 재품등 고효율 오디오신호 부호화를 필요로 하는 제품에 이용한다.It is used for products requiring high efficiency audio signal encoding such as commercial recording / playback equipment or high quality audio equipment.

Description

오디오신호 부호화회로Audio signal encoding circuit

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 본 발명에 따른 엔코더의 구성도, 제2도는 본 발명에 따른 디코더의 구성도.1 is a block diagram of an encoder according to the present invention, Figure 2 is a block diagram of a decoder according to the present invention.

Claims (2)

오디오신호의 부호화회로에 있어서, 입력 디지탈 오디오신호를 소정의 정보손실을 감수하면서 엔코딩하기 위한 제1엔코딩수단과, 상기 제1엔코딩수단의 출력을 소정의 정보손실을 감수하면서 디코딩하기 위한 제1디코딩수단과, 상기 제1디코딩수단에서 출력된 오디오신호와 상기 입력 디지탈 오디오신호의 차를 구하기 위한 감산수단과, 상기 감산결과를 정보의 손실없이 엔코딩하기 위한 제2엔코딩수단과, 상기 제1엔코딩수단에서 출력된 오디오 신호와 제2엔코딩수단에서 출력된 오디오신호를 소정의 포멧에 따라 선택적으로 출력하기 위한 수단으로 구성됨을 특징으로 하는 회로.An audio signal encoding circuit comprising: first encoding means for encoding an input digital audio signal at a predetermined information loss, and first decoding for decoding an output of the first encoding means at a predetermined information loss Means, subtraction means for obtaining a difference between the audio signal output from the first encoding means and the input digital audio signal, second encoding means for encoding the subtraction result without loss of information, and the first encoding means. And means for selectively outputting the audio signal output from the audio signal and the audio signal output from the second encoding means according to a predetermined format. 제1항에 있어서, 디지탈 오디오신호를 소정의 정보손실을 감수하면서 디코딩하기 위한 제2디코딩수단과, 디지탈 오디오신호를 정보의 손실없이 디코딩하기 위한 제3디코딩수단과, 제1엔코딩수단 혹은 제2엔코딩수단에서 출력된 오디오신호를 상기 제2 및 제3디코딩수단으로 출력하기 위한 디멀티플랙싱수단과, 상기 제2 및 제3디코딩수단에서 출력된 오디오신호를 가산하여 상기 제1엔코딩수단으로 입력되면 디지탈 오디오신호와 동일한 출력을 발생시키기 위한 가산수단을 더 구비함을 특징으로 하는 회로.2. The apparatus according to claim 1, further comprising: second decoding means for decoding the digital audio signal while taking a predetermined information loss, third decoding means for decoding the digital audio signal without loss of information, first encoding means or the second Demultiplexing means for outputting the audio signal output from the encoding means to the second and third decoding means and the audio signal output from the second and third decoding means are added to the first encoding means. And adding means for generating the same output as the digital audio signal. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950001490A 1995-01-25 1995-01-25 Audio signal encoding circuit KR0176640B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950001490A KR0176640B1 (en) 1995-01-25 1995-01-25 Audio signal encoding circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950001490A KR0176640B1 (en) 1995-01-25 1995-01-25 Audio signal encoding circuit

Publications (2)

Publication Number Publication Date
KR960030557A true KR960030557A (en) 1996-08-17
KR0176640B1 KR0176640B1 (en) 1999-04-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019950001490A KR0176640B1 (en) 1995-01-25 1995-01-25 Audio signal encoding circuit

Country Status (1)

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Also Published As

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