EP0996112A3 - Silence compression coding/decoding method and device - Google Patents

Silence compression coding/decoding method and device Download PDF

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Publication number
EP0996112A3
EP0996112A3 EP99120614A EP99120614A EP0996112A3 EP 0996112 A3 EP0996112 A3 EP 0996112A3 EP 99120614 A EP99120614 A EP 99120614A EP 99120614 A EP99120614 A EP 99120614A EP 0996112 A3 EP0996112 A3 EP 0996112A3
Authority
EP
European Patent Office
Prior art keywords
background noise
silence compression
decoding
compression coding
coding processing
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.)
Withdrawn
Application number
EP99120614A
Other languages
German (de)
French (fr)
Other versions
EP0996112A2 (en
Inventor
Mieko NEC Corporation Yui
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Electronics Corp
Original Assignee
NEC Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Publication of EP0996112A2 publication Critical patent/EP0996112A2/en
Publication of EP0996112A3 publication Critical patent/EP0996112A3/en
Withdrawn legal-status Critical Current

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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
    • G10L19/012—Comfort noise or silence coding

Landscapes

  • Engineering & Computer Science (AREA)
  • Computational Linguistics (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Analogue/Digital Conversion (AREA)

Abstract

A silence compression coding / decoding method and device of the same enables sound quality of background noise at the time of decoding and transmission efficiency to be improved while selecting either silence compression coding processing or regular coding processing corresponding to background noise level of input speech signal in digital image / speech transmission. A background noise measuring section compares background noise component level 'Sm' in every input frame with discrimination threshold value data 'Srf' in background noise level discrimination section. When the background noise component level 'Sm' exceeds the discrimination threshold value data 'Srf', switches SW1, SW2 select coder (regular coding processing). When the background noise component level 'Sm' does not exceed the discrimination threshold value data 'Srf', switches SW1, SW2 select silence compression correspondence coder (silence compression coding processing). Thus each result of selection is transmitted to decoder. The decoder implements either regular decoding processing or decompression decoding processing according to in-active / active flag stored in frame transmitted from a silence compression coding selector. When the background noise level is large, the device reduces sound quality deterioration of the background noise at the time of decoding while implementing regular coding processing.
EP99120614A 1998-10-20 1999-10-18 Silence compression coding/decoding method and device Withdrawn EP0996112A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP29815298 1998-10-20
JP10298152A JP3061039B2 (en) 1998-10-20 1998-10-20 Silence compression code decoding method and apparatus

Publications (2)

Publication Number Publication Date
EP0996112A2 EP0996112A2 (en) 2000-04-26
EP0996112A3 true EP0996112A3 (en) 2002-06-26

Family

ID=17855879

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99120614A Withdrawn EP0996112A3 (en) 1998-10-20 1999-10-18 Silence compression coding/decoding method and device

Country Status (2)

Country Link
EP (1) EP0996112A3 (en)
JP (1) JP3061039B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110325470A (en) * 2017-03-03 2019-10-11 三菱电机大楼技术服务株式会社 The central side communication device and communication system of elevator

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7010483B2 (en) 2000-06-02 2006-03-07 Canon Kabushiki Kaisha Speech processing system
US7072833B2 (en) 2000-06-02 2006-07-04 Canon Kabushiki Kaisha Speech processing system
US7035790B2 (en) 2000-06-02 2006-04-25 Canon Kabushiki Kaisha Speech processing system
US6954745B2 (en) 2000-06-02 2005-10-11 Canon Kabushiki Kaisha Signal processing system
JP4464707B2 (en) 2004-02-24 2010-05-19 パナソニック株式会社 Communication device
JP2013068532A (en) * 2011-09-22 2013-04-18 Clarion Co Ltd Information terminal, server device, search system, and search method
EP3343558A2 (en) 2015-09-04 2018-07-04 Samsung Electronics Co., Ltd. Signal processing methods and apparatuses for enhancing sound quality
US20200184991A1 (en) * 2018-12-05 2020-06-11 Pascal Cleve Sound class identification using a neural network

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5737695A (en) * 1996-12-21 1998-04-07 Telefonaktiebolaget Lm Ericsson Method and apparatus for controlling the use of discontinuous transmission in a cellular telephone

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5737695A (en) * 1996-12-21 1998-04-07 Telefonaktiebolaget Lm Ericsson Method and apparatus for controlling the use of discontinuous transmission in a cellular telephone

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
BENYASSINE A ET AL: "ITU-T RECOMMENDATION G.729 ANNEX B: A SILENCE COMPRESSION SCHEME FOR USE WITH G.729 OPTIMIZED FOR V.70 DIGITAL SIMULTANEOUS VOICE AND DATA APPLICATIONS", IEEE COMMUNICATIONS MAGAZINE, IEEE SERVICE CENTER. PISCATAWAY, N.J, US, vol. 35, no. 9, 1 September 1997 (1997-09-01), pages 64 - 73, XP000704425, ISSN: 0163-6804 *
GAN X D ET AL: "Implementation of silence compression scheme for G.723.1 speech coder using TI TMS320C51 DSP chip", INFORMATION, COMMUNICATIONS AND SIGNAL PROCESSING, 1997. ICICS., PROCEEDINGS OF 1997 INTERNATIONAL CONFERENCE ON SINGAPORE 9-12 SEPT. 1997, NEW YORK, NY, USA,IEEE, US, 9 September 1997 (1997-09-09), pages 1284 - 1287, XP010264023, ISBN: 0-7803-3676-3 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110325470A (en) * 2017-03-03 2019-10-11 三菱电机大楼技术服务株式会社 The central side communication device and communication system of elevator

Also Published As

Publication number Publication date
EP0996112A2 (en) 2000-04-26
JP3061039B2 (en) 2000-07-10
JP2000124915A (en) 2000-04-28

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