NO913448D0 - PROCEDURE AND DEVICE FOR CODING A COMPLETE ANALOG SIGNAL OF REPEATING NATURE. - Google Patents
PROCEDURE AND DEVICE FOR CODING A COMPLETE ANALOG SIGNAL OF REPEATING NATURE.Info
- Publication number
- NO913448D0 NO913448D0 NO913448A NO913448A NO913448D0 NO 913448 D0 NO913448 D0 NO 913448D0 NO 913448 A NO913448 A NO 913448A NO 913448 A NO913448 A NO 913448A NO 913448 D0 NO913448 D0 NO 913448D0
- Authority
- NO
- Norway
- Prior art keywords
- segment
- samples
- coded
- ltp
- segments
- Prior art date
Links
- 230000007774 longterm Effects 0.000 abstract 1
- 230000003252 repetitive effect Effects 0.000 abstract 1
Classifications
-
- 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
- G10L19/04—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 predictive techniques
- G10L19/08—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters
- G10L19/09—Long term prediction, i.e. removing periodical redundancies, e.g. by using adaptive codebook or pitch predictor
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Acoustics & Sound (AREA)
- Health & Medical Sciences (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Computational Linguistics (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
- Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
- Investigating Or Analysing Biological Materials (AREA)
- Analogue/Digital Conversion (AREA)
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
- Nitrogen Condensed Heterocyclic Rings (AREA)
Abstract
Method and device for coding a signal segment of a sampled analog signal having a repetitive nature according to the principle of long-term prediction (LTP), in which an accuracy is achieved in the coding which is comparable to that of high-resolution LTP (HLTP) without the complexity appreciably increasing with respect to that of LTP. According to the method, after determining the number of samples D between the beginning of the segment to be coded and the beginning of the most similar segment determined according to the LTP principle, the number of samples in the segment to be coded is increased by a predetermined factor Ob by always placing (Ob - 1) samples having a value equal to 0 between two consecutive samples, and the number of samples in the preceding segment is also increased by the factor Ob; in the preceding segment, partial segments Cd are determined for which it is the case that the number of samples Dd, expressed in the numbers of samples after oversampling, between the initial time instant of the segment to be coded and the initial time instant of a partial segment Cd fulfils: Dd = (D * Ob)/d, in which d = 1, 2, 3, 4 ...n, where n is a positive integer and where Ob and n are chosen in a manner such that Dd is always an integer, after which, in the segments Cd, the sample values are determined, by means of an interpolation technique, at predetermined positions which are situated at a spacing Dd from the original samples in the segment to be coded; of the segments Cd, that segment Cd is chosen as the most similar segment which has a correlation value Rd with the samples of the segment to be coded for which it is the case that Rd >/= q * Rmax, where q < 1 and Rmax is the maximum correlation value which has been found in correlating the segments Cd and the segment to be coded, and is that segment which yields the smallest associated value of Dd. <IMAGE>
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL9001985A NL9001985A (en) | 1990-09-10 | 1990-09-10 | METHOD FOR CODING AN ANALOGUE SIGNAL WITH A REPEATING CHARACTER AND A DEVICE FOR CODING ACCORDING TO THIS METHOD |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| NO913448D0 true NO913448D0 (en) | 1991-09-03 |
| NO913448L NO913448L (en) | 1992-03-11 |
| NO302549B1 NO302549B1 (en) | 1998-03-16 |
Family
ID=19857655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO913448A NO302549B1 (en) | 1990-09-10 | 1991-09-03 | Method and apparatus for encoding a sampled analog signal of a repetitive nature |
Country Status (11)
| Country | Link |
|---|---|
| EP (1) | EP0475520B1 (en) |
| JP (1) | JP2640595B2 (en) |
| AT (1) | ATE137354T1 (en) |
| CA (1) | CA2050979C (en) |
| DE (1) | DE69119005T2 (en) |
| DK (1) | DK0475520T3 (en) |
| ES (1) | ES2089113T3 (en) |
| FI (1) | FI105624B (en) |
| NL (1) | NL9001985A (en) |
| NO (1) | NO302549B1 (en) |
| PT (1) | PT98900B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI116992B (en) | 1999-07-05 | 2006-04-28 | Nokia Corp | Methods, systems, and devices for enhancing audio coding and transmission |
| US7388201B2 (en) | 2005-05-13 | 2008-06-17 | National University Of Singapore | Radiation detector having coated nanostructure and method |
| CN117176177B (en) * | 2023-11-03 | 2024-02-06 | 金乡县林业保护和发展服务中心(金乡县湿地保护中心、金乡县野生动植物保护中心、金乡县国有白洼林场) | Data sharing method and system for forestry information |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5648688A (en) * | 1979-09-28 | 1981-05-01 | Hitachi Ltd | Sound analyser |
| DE3783905T2 (en) * | 1987-03-05 | 1993-08-19 | Ibm | BASIC FREQUENCY DETERMINATION METHOD AND VOICE ENCODER USING THIS METHOD. |
-
1990
- 1990-09-10 NL NL9001985A patent/NL9001985A/en not_active Application Discontinuation
-
1991
- 1991-09-03 NO NO913448A patent/NO302549B1/en not_active IP Right Cessation
- 1991-09-06 DE DE69119005T patent/DE69119005T2/en not_active Expired - Lifetime
- 1991-09-06 ES ES91202274T patent/ES2089113T3/en not_active Expired - Lifetime
- 1991-09-06 EP EP91202274A patent/EP0475520B1/en not_active Expired - Lifetime
- 1991-09-06 DK DK91202274.6T patent/DK0475520T3/en active
- 1991-09-06 AT AT91202274T patent/ATE137354T1/en not_active IP Right Cessation
- 1991-09-09 CA CA002050979A patent/CA2050979C/en not_active Expired - Lifetime
- 1991-09-09 PT PT98900A patent/PT98900B/en not_active IP Right Cessation
- 1991-09-10 JP JP3307267A patent/JP2640595B2/en not_active Expired - Lifetime
- 1991-09-10 FI FI914261A patent/FI105624B/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| NL9001985A (en) | 1992-04-01 |
| ATE137354T1 (en) | 1996-05-15 |
| DE69119005T2 (en) | 1996-11-28 |
| DE69119005D1 (en) | 1996-05-30 |
| EP0475520A3 (en) | 1992-09-30 |
| FI914261A0 (en) | 1991-09-10 |
| JPH05206955A (en) | 1993-08-13 |
| NO302549B1 (en) | 1998-03-16 |
| FI914261A (en) | 1992-03-11 |
| EP0475520A2 (en) | 1992-03-18 |
| CA2050979C (en) | 1996-05-21 |
| CA2050979A1 (en) | 1992-03-11 |
| NO913448L (en) | 1992-03-11 |
| JP2640595B2 (en) | 1997-08-13 |
| ES2089113T3 (en) | 1996-10-01 |
| PT98900B (en) | 1999-02-26 |
| EP0475520B1 (en) | 1996-04-24 |
| PT98900A (en) | 1994-01-31 |
| FI105624B (en) | 2000-09-15 |
| DK0475520T3 (en) | 1996-09-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MK1K | Patent expired |