KR970019116A - Digital audio encoding method and apparatus using lookup table - Google Patents
Digital audio encoding method and apparatus using lookup table Download PDFInfo
- Publication number
- KR970019116A KR970019116A KR1019950031355A KR19950031355A KR970019116A KR 970019116 A KR970019116 A KR 970019116A KR 1019950031355 A KR1019950031355 A KR 1019950031355A KR 19950031355 A KR19950031355 A KR 19950031355A KR 970019116 A KR970019116 A KR 970019116A
- Authority
- KR
- South Korea
- Prior art keywords
- lookup table
- digital audio
- bit
- allocation
- address
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- G10L19/0204—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 using subband decomposition
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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
- G10L2019/0001—Codebooks
- G10L2019/0002—Codebook adaptations
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Computational Linguistics (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Human Computer Interaction (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
Abstract
본 발명은 룩업테이블을 이용한 디지털 오디오 부호화방법 및 장치에 관한 것으로서, 입력되는 스테레오 오디오신호의 스케일 팩터와 제곱평균 특성의 조합에 따라 각 주파수대역에 대한 할당비트를 룩업테이블로 작성하는 과정; 입력되는 시간영역의 오디오신호를 소정 갯수의 균등한 주파수대역으로 분할하는 과정; 분할된 각 주파수대역에 대하여 획득한 오디오신호의 특성의 크기순위에 따라 룩업테이블의 주소를 결정하는 과정; 결정된 주소에 해당하는 할당비트를 각 주파수대역에 대하여 할당한 후, 양자화하는 과정; 및 양자화된 오디오 데이터를 비트스트림으로 형성하는 과정으로 이루어진다. 따라서, 청각심리모델을 사용하지 않으므로 부호화기에서의 연산시간 지연을 크게 줄여줌으로써 하드웨어로 구현시 부호화기에서의 실시간 처리가능성이 높아졌다.The present invention relates to a digital audio encoding method and apparatus using a lookup table, comprising: creating a lookup table for allocation bits for each frequency band according to a combination of a scale factor and a root mean square characteristic of an input stereo audio signal; Dividing an input audio signal in a time domain into a predetermined number of equal frequency bands; Determining an address of a lookup table according to the magnitude order of characteristics of the acquired audio signal for each of the divided frequency bands; Allocating an allocation bit corresponding to the determined address for each frequency band and quantizing the allocation bit; And forming a bitstream of the quantized audio data. Therefore, since the psychoacoustic model is not used, the computation time delay in the encoder is greatly reduced, and thus the real-time processing capability of the encoder is increased when implemented in hardware.
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.
제3도는 본 발명에 의한 룩업테이블을 이용한 디지털 오디오 부호화장치를 나타낸 블록도.3 is a block diagram showing a digital audio encoding apparatus using a lookup table according to the present invention.
제4도는 왼쪽 채널의 NMR에 의한 MPEG와 본 발명에 의한 부호화장치의 성능을 비교한 그래프.4 is a graph comparing the performance of the MPEG apparatus according to the NMR of the left channel and the encoding apparatus according to the present invention.
Claims (10)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019950031355A KR100300957B1 (en) | 1995-09-22 | 1995-09-22 | Digital audio encoding method using lookup table and apparatus for the same |
US08/717,610 US5864802A (en) | 1995-09-22 | 1996-09-23 | Digital audio encoding method utilizing look-up table and device thereof |
DE19638997A DE19638997B4 (en) | 1995-09-22 | 1996-09-23 | Digital audio coding method and digital audio coding device |
JP25188196A JP3927627B2 (en) | 1995-09-22 | 1996-09-24 | Digital audio encoding method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019950031355A KR100300957B1 (en) | 1995-09-22 | 1995-09-22 | Digital audio encoding method using lookup table and apparatus for the same |
Publications (2)
Publication Number | Publication Date |
---|---|
KR970019116A true KR970019116A (en) | 1997-04-30 |
KR100300957B1 KR100300957B1 (en) | 2001-11-22 |
Family
ID=37529001
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019950031355A Expired - Fee Related KR100300957B1 (en) | 1995-09-22 | 1995-09-22 | Digital audio encoding method using lookup table and apparatus for the same |
Country Status (1)
Country | Link |
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KR (1) | KR100300957B1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100918115B1 (en) * | 2007-09-28 | 2009-09-22 | 한국전자통신연구원 | A plurality of variable element control methods based on lookup table |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100460804B1 (en) * | 1997-09-03 | 2005-04-06 | 삼성전자주식회사 | Stereoscopic Image Diffusion Device Using Lookup Table |
KR100723400B1 (en) | 2004-05-12 | 2007-05-30 | 삼성전자주식회사 | Digital signal encoding method and apparatus using a plurality of lookup tables |
KR100695125B1 (en) | 2004-05-28 | 2007-03-14 | 삼성전자주식회사 | Digital signal encoding / decoding method and apparatus |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63253785A (en) * | 1986-11-14 | 1988-10-20 | Toshiba Corp | Image compressing device |
US5408580A (en) * | 1992-09-21 | 1995-04-18 | Aware, Inc. | Audio compression system employing multi-rate signal analysis |
-
1995
- 1995-09-22 KR KR1019950031355A patent/KR100300957B1/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100918115B1 (en) * | 2007-09-28 | 2009-09-22 | 한국전자통신연구원 | A plurality of variable element control methods based on lookup table |
Also Published As
Publication number | Publication date |
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KR100300957B1 (en) | 2001-11-22 |
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