KR950034203A - Bit Allocation Method and Circuit for Multichannel Digital Audio - Google Patents

Bit Allocation Method and Circuit for Multichannel Digital Audio Download PDF

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Publication number
KR950034203A
KR950034203A KR1019940012143A KR19940012143A KR950034203A KR 950034203 A KR950034203 A KR 950034203A KR 1019940012143 A KR1019940012143 A KR 1019940012143A KR 19940012143 A KR19940012143 A KR 19940012143A KR 950034203 A KR950034203 A KR 950034203A
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KR
South Korea
Prior art keywords
importance
bit allocation
frequency band
bit
channel
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KR1019940012143A
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Korean (ko)
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KR100289732B1 (en
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김상욱
김연배
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김광호
삼성전자 주식회사
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Priority to KR1019940012143A priority Critical patent/KR100289732B1/en
Publication of KR950034203A publication Critical patent/KR950034203A/en
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Publication of KR100289732B1 publication Critical patent/KR100289732B1/en

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    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; 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

Abstract

본 발명에 의한 다채널 디지탈 오디오의 비트할당벙법 및 회로에서는 인간의 음향심리특성 및 신호의 중요도를 고려하여 각 채널의 비트수를 차등 조절함으로써 동일한 비트수를 가진 종래의 비트할당방법에서보다 음질의 향상을 꾀할 수 있다.In the bit allocation method and the circuit of the multi-channel digital audio according to the present invention, the sound quality of the multi-channel digital audio is adjusted in consideration of the psychoacoustic characteristics of humans and the importance of the signal. Can improve.

Description

다채널 디지탈 오디오의 비트할당방법 및 회로Bit Allocation Method and Circuit for Multichannel Digital Audio

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

제3도는 본 발명에 의한 비트할당포맷을 나타낸 도면이다. 제4도는 본 발명에 의한 다채널 디지탈 오디오의 비트할당회로의 일실시예에 따른 블럭도이다. 제5도는 본 발명에 의한 다채널 디지탈 오디오의 비트할당방법을 설명하기 위한 흐름도이다.3 is a diagram showing a bit allocation format according to the present invention. 4 is a block diagram according to an embodiment of a bit allocation circuit of multi-channel digital audio according to the present invention. 5 is a flowchart illustrating a bit allocation method for multichannel digital audio according to the present invention.

Claims (7)

디지탈 오디오 데이타가 입력되는 각 채널의 중요도를 각 채널의 입력오디오데이타와 마스크된 문턱치와의 비들을 이용하여 계산하는 중요도계산과정; 상기 중요도계산과정에서 계산된 중요도에 따라 상기 각 채널에 할당되는 비트수를 차등 조절하는 비트수조절과정; 및 인간의 음향심리를 고려하여 각 주파수대역으로 분할된 디지탈 오디오 데이타에 상기 차등 조절된 비트수를 할당하는 비트수할당과정을 포함하는것을 특징으로 하는 다채널 오디오의 비트할당방법.A importance calculation process of calculating importance of each channel into which digital audio data is input using ratios of input audio data and masked thresholds of each channel; A bit number adjusting step of differentially adjusting the number of bits allocated to each channel according to the importance calculated in the importance calculation process; And a bit number allocation process for allocating the differentially adjusted number of bits to digital audio data divided into respective frequency bands in consideration of human psychoacoustic. 부호화하고자 입력되는 다채널 오디오 테이타를 주파수 대역별로 분류하기 위한 맵핑수단; 상기 맵핑수단에서 출력되는 각 주파수 대역의 데이타에 대하여 인간의 음향심리특성을 고려하여 중요도를 계산하여 중요도에 따라 비트할당을 제어하기 위한 비트할당 제어부; 상기 비트할당 제어부에서 할당된 비트수에 따라 최적의 양자화간격을 설정하고, 상기 맵핑수단에서 출력되는 각 주파수대역의 데이타를 상기 양자화간격으로 양자화하기 위한 양자화수단 ; 및 상기 양자화수단에서 출력되는 신호들의 발생빈도를 고려하여 부호화를 행하는 비트팩킹부를 포함하는 것을 특징으로 하는 다채널 디지탈 오디오의 비트할당회로.Mapping means for classifying the multichannel audio data to be encoded for each frequency band; A bit allocation control unit for calculating the importance of the human psychoacoustic characteristics with respect to the data of each frequency band output from the mapping means and controlling bit allocation according to the importance; Quantization means for setting an optimal quantization interval according to the number of bits allocated by the bit allocation control unit, and for quantizing data of each frequency band output from the mapping means to the quantization interval; And a bit packing unit for encoding in consideration of the frequency of occurrence of the signals output from the quantization means. 제2항에 있어서, 상기 비트할당제어부는 각 채널의 각 주파수대역에서의 SMR을 구한 후 각 채널의 총 SMR을 계산하여 SMR로부터 상기 중요도를 계산하는 것을 특징으로 하는 다채널 디지탈 오디오의 비트할당회로.3. The bit allocation circuit of claim 2, wherein the bit allocation controller calculates the importance from the SMR by calculating the total SMR of each channel after obtaining the SMR in each frequency band of each channel. . 제 3항에 있어서, 상기 주파수대역들중 최소의 SMR값을 갖는 부분을 오프셋으로 이용하여 상기 중요도를 보정하는 것을 특징으로 하는 다채널 디지탈 오디오의 비트할당회로.4. The bit allocation circuit of claim 3, wherein the importance is corrected by using a portion of the frequency bands having the smallest SMR value as an offset. 제3항에 있어서, 인간의 음향심리를 고려하여 비트들을 할당할때 각 주파수대역에 가중치를 곱해줌으로써 중요도를 인위적으로 조절하는 것을 특징으로 하는 다채널 디지탈 오디오의 비트할당회로.4. The bit allocation circuit of claim 3, wherein the importance is artificially adjusted by multiplying each frequency band with weights when allocating bits in consideration of human psychoacoustic. 제 5항에 있어서, 상기 가중치는 고주파수대역에서 높여주어 상기 고주파수대역에서부터 비트들을 할당하는 것을 특징으로 하는 다채널 디지탈 오디오의 비트할당회로.6. The bit allocation circuit of claim 5, wherein the weight is increased in the high frequency band to allocate bits from the high frequency band. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940012143A 1994-05-31 1994-05-31 Circuit and method for allocating bits of multi-channel digital audio KR100289732B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100467326B1 (en) * 2002-12-09 2005-01-24 학교법인연세대학교 Transmitter and receiver having for speech coding and decoding using additional bit allocation method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101410615B1 (en) 2013-06-03 2014-06-20 이화여자대학교 산학협력단 Method and system for processing data code in audio signals

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100467326B1 (en) * 2002-12-09 2005-01-24 학교법인연세대학교 Transmitter and receiver having for speech coding and decoding using additional bit allocation method

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