KR940017250A - Multichannel Stereo Signal Compression Circuit - Google Patents

Multichannel Stereo Signal Compression Circuit Download PDF

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Publication number
KR940017250A
KR940017250A KR1019920027177A KR920027177A KR940017250A KR 940017250 A KR940017250 A KR 940017250A KR 1019920027177 A KR1019920027177 A KR 1019920027177A KR 920027177 A KR920027177 A KR 920027177A KR 940017250 A KR940017250 A KR 940017250A
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KR
South Korea
Prior art keywords
compression circuit
stereo signal
channel
signal compression
subband analysis
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Application number
KR1019920027177A
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Korean (ko)
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KR0129781B1 (en
Inventor
강철석
Original Assignee
김주용
현대전자산업 주식회사
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Priority to KR1019920027177A priority Critical patent/KR0129781B1/en
Publication of KR940017250A publication Critical patent/KR940017250A/en
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Publication of KR0129781B1 publication Critical patent/KR0129781B1/en

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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
    • H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction

Abstract

2채널 이상의 디지탈오디오 데이터 압축기기에 적용되는 데이터 압축회로에 관한 것으로, 특히 서브밴드분석/합성기법을 이용하는 데이터 압축기기에 적용할수 있는 다채널 스테레오 신호 압축회로에 관한 것이다.The present invention relates to a data compression circuit applied to a two-channel or more digital audio data compressor, and more particularly, to a multi-channel stereo signal compression circuit applicable to a data compressor using a subband analysis / synthesis technique.

종래의 데이타 압축회로는 고역신호에 대해서만 조인트스테레오모드를 적용하므로 인간의 청각특성상 인지하기 어렵고 스테레오신호로서 의미가 적은 아주낮은 주파수대역신호를 효율적으로 압축하지 못하는 결점이 있다.In the conventional data compression circuit, since the joint stereo mode is applied only to a high-frequency signal, it is difficult to recognize due to human hearing characteristics and has a drawback in that it cannot efficiently compress a very low frequency band signal having a small meaning as a stereo signal.

본 발명은 이와같은 문제점을 감안하여, 2채널이상의 스테레오 오디오 기기에 있어서, 채널간 상관관계를 이용하여 데이터를 압축하는 것을 특징으로 한다.In view of the above problems, the present invention is characterized in that, in stereo audio devices having two or more channels, data is compressed using inter-channel correlation.

Description

다채널 스테레오 신호 압축회로Multichannel Stereo Signal Compression Circuit

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

제2도는 본 발명 다채널 스테레오 신호 압축회로의 구성도이다.2 is a block diagram of a multi-channel stereo signal compression circuit of the present invention.

Claims (2)

입력된 오디오신호(a), (b)를 각 주파수 대역으로 분해하는 서브밴드분석 필터(10), (11)와; 상기 입력된 오디오신호(a), (b)에 대하여 주파수성분을 분석하고 이를 근거로 인간의 청각특성에 근거하여 서브밴드 분석결과의 양자화율을 결정하는 심리음향모델(20), (21)과; 상기 심리음향모델(20), (21)의 양자화율에 따라 서브밴드 분석필터(10), (11)로 부터 각각 얻은 각 대역신호(c), (d), (e), (f), (g), (h)를 적응양자화하는 양자화기(30), (31)와; 적응양자화된 각 주파수대역성분(o), (p), (q), (r), (s), (t) 및 제어정보(u)를 전송에 맞는 형태로 합성하여 전송용 비트스트림(v)을 만드는 프레임포메터(41)로 구성함을 특징으로 하는 다채널스테레오신호 압축회로.Subband analysis filters (10) and (11) for decomposing the input audio signals (a) and (b) into respective frequency bands; Psychoacoustic models (20) and (21) for analyzing frequency components of the input audio signals (a) and (b) and determining quantization rates of subband analysis results based on human auditory characteristics ; Each band signal (c), (d), (e), (f), respectively, obtained from the subband analysis filters 10 and 11 according to the quantization rates of the psychoacoustic models 20 and 21, respectively. quantizers 30 and 31 for adaptive quantization of (g) and (h); Each adaptive quantized frequency band component (o), (p), (q), (r), (s), (t) and control information (u) are synthesized in a form suitable for transmission, and a bitstream for transmission (v) Multi-channel stereo signal compression circuit, characterized in that consisting of a frameformer (41) making. 제1항에 있어서, 상기 프레임포메터(41)는 동작제어정보(u)에 따라 조인트스테레오모드일 경우 양자화기(30), (31)의 출력중에서 중간주파수대역성분(p), (s)은 양채널의 출력을 모두 전송하지만 저주파수대역성분(o), (r) 및 고주파수대역성분(q), (t)은 대표치로서 예를들어 좌채널출력(o), (q)만을 전송하는 것을 특징으로 하는 다채널스테레오신호 압축회로.The intermediate frequency band components (p) and (s) of claim 1, wherein the frameformer 41 is in the joint stereo mode according to the operation control information (u). Transmits the output of both channels, but the low-frequency components (o), (r) and high-frequency components (q), (t) are representative values, for example, only the left channel outputs (o) and (q). Multi-channel stereo signal compression circuit, characterized in that. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019920027177A 1992-12-31 1992-12-31 Multi channel stereo signal compression circuit KR0129781B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019920027177A KR0129781B1 (en) 1992-12-31 1992-12-31 Multi channel stereo signal compression circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019920027177A KR0129781B1 (en) 1992-12-31 1992-12-31 Multi channel stereo signal compression circuit

Publications (2)

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KR940017250A true KR940017250A (en) 1994-07-26
KR0129781B1 KR0129781B1 (en) 1998-10-01

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101334134B1 (en) * 2012-08-09 2013-12-02 전자부품연구원 Multi channel audio coding method and apparatus

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