WO2001019138A3 - Method and apparatus for generating a second audio signal from a first audio signal - Google Patents

Method and apparatus for generating a second audio signal from a first audio signal Download PDF

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Publication number
WO2001019138A3
WO2001019138A3 PCT/GB2000/003393 GB0003393W WO0119138A3 WO 2001019138 A3 WO2001019138 A3 WO 2001019138A3 GB 0003393 W GB0003393 W GB 0003393W WO 0119138 A3 WO0119138 A3 WO 0119138A3
Authority
WO
WIPO (PCT)
Prior art keywords
delayed
signal
audio signal
gain
zero
Prior art date
Application number
PCT/GB2000/003393
Other languages
French (fr)
Other versions
WO2001019138A2 (en
Inventor
Michael Percy
Alastair Sibbald
Original Assignee
Central Research Lab Ltd
Michael Percy
Alastair Sibbald
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 Central Research Lab Ltd, Michael Percy, Alastair Sibbald filed Critical Central Research Lab Ltd
Priority to EP00956732A priority Critical patent/EP1212923B1/en
Priority to DE60010100T priority patent/DE60010100D1/en
Priority to AT00956732T priority patent/ATE265128T1/en
Publication of WO2001019138A2 publication Critical patent/WO2001019138A2/en
Publication of WO2001019138A3 publication Critical patent/WO2001019138A3/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S5/00—Pseudo-stereo systems, e.g. in which additional channel signals are derived from monophonic signals by means of phase shifting, time delay or reverberation 

Abstract

A method of generating a second decorrelated audio signal from a first audio signal, for use in synthesising a 3D sound field, includes: a) deriving from the first signal a first delayed signal; b) multiplying this first delayed signal by a gain factor between zero and minus one to give a first delayed gain-adjusted signal; c) deriving from the first audio signal a second delayed signal, having a different delay time from the first delayed signal; d) multiplying this second delayed signal by a gain factor between zero and plus one (such that the said gain factors sum to zero) to give a second delayed gain-adjusted signal; e) combining said first and said second delayed gain-adjusted signals with the first audio signal to provide a second decorrelated audio signal. The first and second delayed signals are delayed by time periods which change in a substantially random manner.
PCT/GB2000/003393 1999-09-04 2000-09-04 Method and apparatus for generating a second audio signal from a first audio signal WO2001019138A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP00956732A EP1212923B1 (en) 1999-09-04 2000-09-04 Method and apparatus for generating a second audio signal from a first audio signal
DE60010100T DE60010100D1 (en) 1999-09-04 2000-09-04 METHOD AND ARRANGEMENT FOR GENERATING A SECOND AUDIO SIGNAL FROM A FIRST AUDIO SIGNAL
AT00956732T ATE265128T1 (en) 1999-09-04 2000-09-04 METHOD AND ARRANGEMENT FOR GENERATING A SECOND AUDIO SIGNAL FROM A FIRST AUDIO SIGNAL

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9920811.8 1999-09-04
GB9920811A GB2353926B (en) 1999-09-04 1999-09-04 Method and apparatus for generating a second audio signal from a first audio signal

Publications (2)

Publication Number Publication Date
WO2001019138A2 WO2001019138A2 (en) 2001-03-15
WO2001019138A3 true WO2001019138A3 (en) 2001-11-15

Family

ID=10860265

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2000/003393 WO2001019138A2 (en) 1999-09-04 2000-09-04 Method and apparatus for generating a second audio signal from a first audio signal

Country Status (5)

Country Link
EP (1) EP1212923B1 (en)
AT (1) ATE265128T1 (en)
DE (1) DE60010100D1 (en)
GB (1) GB2353926B (en)
WO (1) WO2001019138A2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2323294T3 (en) 2002-04-22 2009-07-10 Koninklijke Philips Electronics N.V. DECODING DEVICE WITH A DECORRELATION UNIT.
SE0301273D0 (en) 2003-04-30 2003-04-30 Coding Technologies Sweden Ab Advanced processing based on a complex exponential-modulated filter bank and adaptive time signaling methods
FR2853804A1 (en) * 2003-07-11 2004-10-15 France Telecom Audio signal decoding process, involves constructing uncorrelated signal from audio signals based on audio signal frequency transformation, and joining audio and uncorrelated signals to generate signal representing acoustic scene
TWI393121B (en) 2004-08-25 2013-04-11 Dolby Lab Licensing Corp Method and apparatus for processing a set of n audio signals, and computer program associated therewith
US8184834B2 (en) 2006-09-14 2012-05-22 Lg Electronics Inc. Controller and user interface for dialogue enhancement techniques

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4625326A (en) * 1983-11-17 1986-11-25 U.S. Philips Corporation Apparatus for generating a pseudo-stereo signal
US5553150A (en) * 1993-10-21 1996-09-03 Yamaha Corporation Reverberation - imparting device capable of modulating an input signal by random numbers
US5555306A (en) * 1991-04-04 1996-09-10 Trifield Productions Limited Audio signal processor providing simulated source distance control
US5666425A (en) * 1993-03-18 1997-09-09 Central Research Laboratories Limited Plural-channel sound processing
US5774560A (en) * 1996-05-30 1998-06-30 Industrial Technology Research Institute Digital acoustic reverberation filter network
WO1998030064A1 (en) * 1996-12-28 1998-07-09 Central Research Laboratories Limited Processing audio signals

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4625326A (en) * 1983-11-17 1986-11-25 U.S. Philips Corporation Apparatus for generating a pseudo-stereo signal
US5555306A (en) * 1991-04-04 1996-09-10 Trifield Productions Limited Audio signal processor providing simulated source distance control
US5666425A (en) * 1993-03-18 1997-09-09 Central Research Laboratories Limited Plural-channel sound processing
US5553150A (en) * 1993-10-21 1996-09-03 Yamaha Corporation Reverberation - imparting device capable of modulating an input signal by random numbers
US5774560A (en) * 1996-05-30 1998-06-30 Industrial Technology Research Institute Digital acoustic reverberation filter network
WO1998030064A1 (en) * 1996-12-28 1998-07-09 Central Research Laboratories Limited Processing audio signals

Also Published As

Publication number Publication date
GB2353926A (en) 2001-03-07
DE60010100D1 (en) 2004-05-27
EP1212923A2 (en) 2002-06-12
GB9920811D0 (en) 1999-11-10
EP1212923B1 (en) 2004-04-21
ATE265128T1 (en) 2004-05-15
WO2001019138A2 (en) 2001-03-15
GB2353926B (en) 2003-10-29

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