CA2089478A1 - Automatic length-reducing audio delay line - Google Patents

Automatic length-reducing audio delay line

Info

Publication number
CA2089478A1
CA2089478A1 CA2089478A CA2089478A CA2089478A1 CA 2089478 A1 CA2089478 A1 CA 2089478A1 CA 2089478 A CA2089478 A CA 2089478A CA 2089478 A CA2089478 A CA 2089478A CA 2089478 A1 CA2089478 A1 CA 2089478A1
Authority
CA
Canada
Prior art keywords
buffer
input signal
length
input
delay
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.)
Granted
Application number
CA2089478A
Other languages
French (fr)
Other versions
CA2089478C (en
Inventor
Eric R. Schorman
John D. Reed
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.)
Motorola Solutions Inc
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2089478A1 publication Critical patent/CA2089478A1/en
Application granted granted Critical
Publication of CA2089478C publication Critical patent/CA2089478C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/04—Time compression or expansion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2250/00—Details of telephonic subscriber devices
    • H04M2250/74—Details of telephonic subscriber devices with voice recognition means

Abstract

An electronic system and a method substantially eliminates any delays caused by buffering of a signal containing speech.
The electronic system comprises a receiver for receiving signals (16), a buffer (26), coupled to the receiver, a buffer controller (28) coupled to the buffer, and an audio section (32) for presenting signals received to a listener. The method comprises the following steps. The receiver receives an input signal representing speech, and produces an output signal representing the input signal after a delay intentionally introduced in the system. The delay corresponds to the length of the buffer. The buffer stores the input sig-nal in the buffer at an input rate, and produces the output signal at an output rate. The buffer controller determines whether the delay or buffer length is greater than a predetermined threshold, and analyzes at least a portion of the input signal stored in the buffer to determine which parts of the input signal may be removed without substantially deterioration of the signal quality accord-ing to at least one predetermined criterion, when the buffer length is greater than a predetermined length. The buffer controller then deletes at least some of the parts of the input signal stored in the buffer that comply with the predetermined criterion.
CA002089478A 1990-10-01 1991-10-01 Automatic length-reducing audio delay line Expired - Fee Related CA2089478C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US592,001 1990-10-01
US07/592,001 US5157728A (en) 1990-10-01 1990-10-01 Automatic length-reducing audio delay line

Publications (2)

Publication Number Publication Date
CA2089478A1 true CA2089478A1 (en) 1992-04-02
CA2089478C CA2089478C (en) 1996-07-02

Family

ID=24368860

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002089478A Expired - Fee Related CA2089478C (en) 1990-10-01 1991-10-01 Automatic length-reducing audio delay line

Country Status (6)

Country Link
US (1) US5157728A (en)
EP (1) EP0551422B1 (en)
JP (1) JP2850157B2 (en)
CA (1) CA2089478C (en)
DE (1) DE69132029T2 (en)
WO (1) WO1992006467A1 (en)

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JPH07281689A (en) * 1994-04-08 1995-10-27 Matsushita Electric Ind Co Ltd Audio signal transmission device
DE69534561T2 (en) * 1994-08-22 2006-07-27 Sony Corp. TRANSMITTER-RECEIVER
JPH08292798A (en) * 1995-04-24 1996-11-05 Nec Corp Voice reproducing control method
EP0907161B1 (en) * 1997-09-18 2001-07-11 Victor Company Of Japan, Ltd. Apparatus for processing audio signal
MY118991A (en) * 1997-09-22 2005-02-28 Victor Company Of Japan Apparatus for processing audio signal
US6205097B1 (en) 1999-01-06 2001-03-20 Visteon Global Technologies, Inc. Method of enhanced data compression rate for a CD player
US6243329B1 (en) 1999-01-06 2001-06-05 Visteon Global Technologies, Inc. Method of enhanced compression rate for a multi-disc CD player
JP4895418B2 (en) * 1999-08-24 2012-03-14 ソニー株式会社 Audio reproduction method and audio reproduction apparatus
DE10024864A1 (en) * 2000-05-19 2001-11-22 Siemens Ag Improving transmission quality in radio communications system after establishing interrupted link involves releasing data separated by time intervals before processing/transmission
SE0004839D0 (en) * 2000-12-22 2000-12-22 Ericsson Telefon Ab L M Method and communication apparatus in a communication system
US6999921B2 (en) * 2001-12-13 2006-02-14 Motorola, Inc. Audio overhang reduction by silent frame deletion in wireless calls
US7099820B1 (en) * 2002-02-15 2006-08-29 Cisco Technology, Inc. Method and apparatus for concealing jitter buffer expansion and contraction
US7149412B2 (en) * 2002-03-01 2006-12-12 Thomson Licensing Trick mode audio playback
US7369671B2 (en) * 2002-09-16 2008-05-06 Starkey, Laboratories, Inc. Switching structures for hearing aid
US7395208B2 (en) * 2002-09-27 2008-07-01 Microsoft Corporation Integrating external voices
US20040143675A1 (en) * 2003-01-16 2004-07-22 Aust Andreas Matthias Resynchronizing drifted data streams with a minimum of noticeable artifacts
US7280813B2 (en) * 2003-03-13 2007-10-09 Peter Fortier Elliott Variable delay radio receiver
ATE438271T1 (en) * 2004-03-04 2009-08-15 Ericsson Telefon Ab L M REDUCING WAITING TIME FOR PRESS TO TALK (PTT) SERVICES
US20050227657A1 (en) * 2004-04-07 2005-10-13 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for increasing perceived interactivity in communications systems
US20070223660A1 (en) * 2004-04-09 2007-09-27 Hiroaki Dei Audio Communication Method And Device
US7970020B2 (en) * 2004-10-27 2011-06-28 Telefonaktiebolaget Lm Ericsson (Publ) Terminal having plural playback pointers for jitter buffer
US20060123194A1 (en) * 2004-12-02 2006-06-08 Claudio Alex Cukierkopf Variable effective depth write buffer and methods thereof
AU2005334879B2 (en) * 2005-07-27 2009-11-26 Kabushiki Kaisha Audio-Technica Conference audio system
EP2143103A4 (en) 2007-03-29 2011-11-30 Ericsson Telefon Ab L M Method and speech encoder with length adjustment of dtx hangover period
GB2451265B (en) * 2007-07-25 2012-01-04 Wolfson Microelectronics Plc Control sequencer
JP2009288523A (en) * 2008-05-29 2009-12-10 Toshiba Corp Speech recognition apparatus and method thereof
EP2355497A1 (en) * 2009-12-21 2011-08-10 Nxp B.V. Full spectrum time shifting device
US9337949B2 (en) 2011-08-31 2016-05-10 Cablecam, Llc Control system for an aerially moved payload
US10720153B2 (en) * 2013-12-13 2020-07-21 Harman International Industries, Incorporated Name-sensitive listening device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4110560A (en) * 1977-11-23 1978-08-29 Gte Sylvania Incorporated Communication apparatus
GB2113054A (en) * 1981-12-21 1983-07-27 Voice Microsystems Ltd Speech detector
US4920534A (en) * 1986-02-28 1990-04-24 At&T Bell Laboratories System for controllably eliminating bits from packet information field based on indicator in header and amount of data in packet buffer
IL84902A (en) * 1987-12-21 1991-12-15 D S P Group Israel Ltd Digital autocorrelation system for detecting speech in noisy audio signal

Also Published As

Publication number Publication date
DE69132029T2 (en) 2000-11-02
EP0551422B1 (en) 2000-03-08
DE69132029D1 (en) 2000-04-13
CA2089478C (en) 1996-07-02
EP0551422A4 (en) 1995-01-25
WO1992006467A1 (en) 1992-04-16
JP2850157B2 (en) 1999-01-27
EP0551422A1 (en) 1993-07-21
US5157728A (en) 1992-10-20
JPH06501597A (en) 1994-02-17

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