KR950013052A - Audio signal encoding method - Google Patents

Audio signal encoding method Download PDF

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Publication number
KR950013052A
KR950013052A KR1019930022951A KR930022951A KR950013052A KR 950013052 A KR950013052 A KR 950013052A KR 1019930022951 A KR1019930022951 A KR 1019930022951A KR 930022951 A KR930022951 A KR 930022951A KR 950013052 A KR950013052 A KR 950013052A
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KR
South Korea
Prior art keywords
quantization bits
allocated
audio signal
bits
band
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Application number
KR1019930022951A
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Korean (ko)
Inventor
김상욱
Original Assignee
김광호
삼성전자 주식회사
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Application filed by 김광호, 삼성전자 주식회사 filed Critical 김광호
Priority to KR1019930022951A priority Critical patent/KR950013052A/en
Publication of KR950013052A publication Critical patent/KR950013052A/en

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Abstract

샘플링된 오디오신호의 양자화비트수를 할당함에 있어서 할당비트의 연산속도를 개선한 부화방법이 개시된다. 본 발명에 의한 부호화방법은 비트할당시 어떤 문턱치를 이용하여 할당될 비트수를 미리 결정해줌에 의해 기존의 방법보다 적은 연산에 의해 유사한 결과를 얻을 수 있는 효과를 갖는다.Disclosed is a hatching method in which an operation speed of allocated bits is improved in allocating the number of quantized bits of a sampled audio signal. The encoding method according to the present invention has an effect that a similar result can be obtained by fewer operations than the conventional method by determining a predetermined number of bits to be allocated using a certain threshold in bit allocation.

Description

오디오신호의 부호화방법Audio signal encoding method

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

제3도는 입력신호에 의한 변형된 마스크된 문턱치의 일예를 도시한 도면이다,3 is a diagram illustrating an example of a modified masked threshold caused by an input signal.

제4도는 NMR에 의한 청취가능한 영역판정의 일예를 도시한다.4 shows an example of audible region determination by NMR.

Claims (2)

가칭주파수대역을 갖는 시간영역의 오디오신호를 샘플링하는 과정, 샘플링된 오디오신호를 복수의 임계대역으로 분할된 주파수영역의 신호로 변환하는 과정, 각 임계대역마다 당해 임계대역의 MNR을 최대로 하는 양자화 비트수를 할당하는 과정 그리고 할당한 양자화 비트수에 의해 주파수영역의 신호를 양자화하는 과정을 갖는 부호화방법에 있어서, 상기 비트할당과정은 모든 임계대역에 대하여 SMR과 당해 임계대역의 SNR의 차가 소정의 문턱지 이상이 되는 최소의 양자화비트수를 할당하는 제1과정; 상용가능한 양자화비트수를 모두 할당할 때까지 상기 SMR과 각각의 임계대역에 할당된 양자화비트수에 의한 SNR과의 차이를 계산하고, 그중에서 가장작은 값을 임계대역을 찾아 양자화비트수를 추가로 할당하는 것을 반복하는 제2과정을 포함함을 특징으로 하는 오디오 신호의 부호화방법.Sampling the audio signal in the time domain having a tentative frequency band, converting the sampled audio signal into a signal in the frequency domain divided into a plurality of critical bands, and quantizing the maximum MNR of the critical band for each critical band. A coding method comprising a step of allocating a number of bits and a step of quantizing a signal in a frequency domain according to the number of allocated quantization bits, wherein the bit allocation process has a predetermined difference between an SMR and an SNR of the critical band for all threshold bands. A first step of allocating a minimum number of quantization bits that are equal to or greater than a threshold; Calculate the difference between the SMR and the SNR by the number of quantization bits allocated to each critical band until all the available quantization bits are allocated, and find the critical band with the smallest value to further add the number of quantization bits. And a second step of repeating the assignment. 제1항에 있어서, 상기 제1과정의 문턱치는 각 대역에 대해서 미리 결정된 상수값을 갖음을 특징으로 하는 오디오 신호의 부호화방법.The method of claim 1, wherein the threshold of the first process has a predetermined constant value for each band. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930022951A 1993-10-30 1993-10-30 Audio signal encoding method KR950013052A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019930022951A KR950013052A (en) 1993-10-30 1993-10-30 Audio signal encoding method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019930022951A KR950013052A (en) 1993-10-30 1993-10-30 Audio signal encoding method

Publications (1)

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KR950013052A true KR950013052A (en) 1995-05-17

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