FI914261A - FOERFARANDE FOER KODNING AV EN ANALOG SIGNAL AV REPETITIV NATUR SAMT ANORDNING FOER KODNING ENLIGT NAEMNDA FOERFARANDE. - Google Patents

FOERFARANDE FOER KODNING AV EN ANALOG SIGNAL AV REPETITIV NATUR SAMT ANORDNING FOER KODNING ENLIGT NAEMNDA FOERFARANDE. Download PDF

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Publication number
FI914261A
FI914261A FI914261A FI914261A FI914261A FI 914261 A FI914261 A FI 914261A FI 914261 A FI914261 A FI 914261A FI 914261 A FI914261 A FI 914261A FI 914261 A FI914261 A FI 914261A
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FI
Finland
Prior art keywords
segment
samples
coded
kodning
foerfarande
Prior art date
Application number
FI914261A
Other languages
Finnish (fi)
Other versions
FI105624B (en
FI914261A0 (en
Inventor
Der Krogt Adrianus Alponsi Van
Ravesteijn Robertus Lamber Van
Original Assignee
Nederland Ptt
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Application filed by Nederland Ptt filed Critical Nederland Ptt
Publication of FI914261A0 publication Critical patent/FI914261A0/en
Publication of FI914261A publication Critical patent/FI914261A/en
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Publication of FI105624B publication Critical patent/FI105624B/en

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Classifications

    • 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
    • G10L19/04—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)
  • Analogue/Digital Conversion (AREA)
  • Investigating Or Analysing Biological Materials (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>
FI914261A 1990-09-10 1991-09-10 Method for encoding an analog signal of repetitive nature and apparatus for encoding according to said method FI105624B (en)

Applications Claiming Priority (2)

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
NL9001985 1990-09-10

Publications (3)

Publication Number Publication Date
FI914261A0 FI914261A0 (en) 1991-09-10
FI914261A true FI914261A (en) 1992-03-11
FI105624B FI105624B (en) 2000-09-15

Family

ID=19857655

Family Applications (1)

Application Number Title Priority Date Filing Date
FI914261A FI105624B (en) 1990-09-10 1991-09-10 Method for encoding an analog signal of repetitive nature and apparatus for encoding according to said method

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5648688A (en) * 1979-09-28 1981-05-01 Hitachi Ltd Sound analyser
ES2037101T3 (en) * 1987-03-05 1993-06-16 International Business Machines Corporation TONE DETECTION AND VOICE ENCODER PROCEDURE USING SUCH PROCEDURE.

Also Published As

Publication number Publication date
CA2050979A1 (en) 1992-03-11
JPH05206955A (en) 1993-08-13
PT98900A (en) 1994-01-31
PT98900B (en) 1999-02-26
DK0475520T3 (en) 1996-09-02
EP0475520B1 (en) 1996-04-24
JP2640595B2 (en) 1997-08-13
NL9001985A (en) 1992-04-01
FI105624B (en) 2000-09-15
NO302549B1 (en) 1998-03-16
EP0475520A3 (en) 1992-09-30
FI914261A0 (en) 1991-09-10
ATE137354T1 (en) 1996-05-15
NO913448L (en) 1992-03-11
EP0475520A2 (en) 1992-03-18
ES2089113T3 (en) 1996-10-01
NO913448D0 (en) 1991-09-03
DE69119005D1 (en) 1996-05-30
DE69119005T2 (en) 1996-11-28
CA2050979C (en) 1996-05-21

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