KR940012340A - Bit Allocation Method Using Audible Threshold of Digital Audio Equipment - Google Patents

Bit Allocation Method Using Audible Threshold of Digital Audio Equipment Download PDF

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Publication number
KR940012340A
KR940012340A KR1019920021144A KR920021144A KR940012340A KR 940012340 A KR940012340 A KR 940012340A KR 1019920021144 A KR1019920021144 A KR 1019920021144A KR 920021144 A KR920021144 A KR 920021144A KR 940012340 A KR940012340 A KR 940012340A
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KR
South Korea
Prior art keywords
bit allocation
audible threshold
digital audio
allocation method
audible
Prior art date
Application number
KR1019920021144A
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Korean (ko)
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KR950003627B1 (en
Inventor
태원근
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이헌조
주식회사 금성사
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Priority to KR1019920021144A priority Critical patent/KR950003627B1/en
Publication of KR940012340A publication Critical patent/KR940012340A/en
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Publication of KR950003627B1 publication Critical patent/KR950003627B1/en

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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor

Abstract

본 발명은 디지탈 오디오 기기의 녹음, 재새과정에서 가청 임계점을 이용하여 데이타 압축시 발생하는 원음과의 차이를 최소화하여 음질을 개선코자한 비트 할당 방법에 관한 것이다.The present invention relates to a bit allocation method for improving sound quality by minimizing a difference from the original sound generated during data compression by using an audible threshold during recording and re-writing of a digital audio device.

이를 위하여 본 발명은 비트 할당후 마스킹 효과에 의한 신호 압축을 행하는 기존의 방식을 지양하고 마스킹 곡선을 기준점으로하여 시간축이 주파수 축으로 변환된 블럭 i번째 변화량을 구한후 마스킹 레벨값 이상일 경우에만 비트 할당을 행하여 압축, 재생된 음질 개선을 도모코자 한 것이다.To this end, the present invention avoids the conventional method of compressing the signal by the masking effect after bit allocation, and obtains the bit allocation only when the mask is at the masking level value after calculating the i-th change of the time axis converted into the frequency axis by using the masking curve as a reference point. This is to improve the compressed and reproduced sound quality.

Description

디지탈 오디오 기기의 가청 임계점을 이용한 비트 할당방법Bit Allocation Method Using Audible Threshold of Digital Audio Equipment

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제3도는 본 발명에 따른 가정 임계 곡선의 기준점을 이용한 비트 할당 방법을 설명하기 위한 그래프,3 is a graph for explaining a bit allocation method using a reference point of a hypothetical threshold curve according to the present invention;

제4도는 본 발명에 따른 비트 할당 방법과 관련된 장치의 블럭 구성도.4 is a block diagram of an apparatus related to a bit allocation method according to the present invention.

Claims (1)

펄스 부호 변조기(1), 레지스터(2), 코드변환기(3) 및 가청 임계점 검출기(4)를 순차적으로 거쳐 가청 임계점이 검출된 데이타를 가청 임계점 데이타 보정부(10)에 의해 녹음시에는 가청 임계점 값을 부(-)값으로 하고 재생시에는 정(+)값으로 하여 처리하고, 상기 데이타보정부(10)를 거쳐 보정된 데이타를 가정 임계 곡선을 기준점으로하여 시간축이 주파수축으로 변환된 블럭 i번째 변화량(σ2i)을 구한후 마스킹레벨값 이상일 경우에만 비트 할당을 행하도록 함을 특징으로 하는 디지탈 오디오 기기의 가청 임계점을 이용한 비트할당방법The audible threshold point is recorded when the audible threshold data is recorded by the audible threshold data correction unit 10 through the pulse code modulator 1, the register 2, the code converter 3, and the audible threshold detector 4 in sequence. The block i, whose time axis is converted to the frequency axis, is processed with a negative value and a positive value during reproduction, and the data corrected through the data correction unit 10 is assumed as a reference point based on a hypothetical threshold curve. Bit allocation method using an audible threshold of a digital audio device, characterized in that bit allocation is performed only after the first change amount σ 2 i is obtained. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019920021144A 1992-11-11 1992-11-11 Bit allocating method using threshold audibility of digital audio machine KR950003627B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019920021144A KR950003627B1 (en) 1992-11-11 1992-11-11 Bit allocating method using threshold audibility of digital audio machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019920021144A KR950003627B1 (en) 1992-11-11 1992-11-11 Bit allocating method using threshold audibility of digital audio machine

Publications (2)

Publication Number Publication Date
KR940012340A true KR940012340A (en) 1994-06-23
KR950003627B1 KR950003627B1 (en) 1995-04-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019920021144A KR950003627B1 (en) 1992-11-11 1992-11-11 Bit allocating method using threshold audibility of digital audio machine

Country Status (1)

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KR (1) KR950003627B1 (en)

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Publication number Publication date
KR950003627B1 (en) 1995-04-17

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