Repository logo

Infoscience

  • English
  • French
Log In
Logo EPFL, École polytechnique fédérale de Lausanne

Infoscience

  • English
  • French
Log In
  1. Home
  2. Academic and Research Output
  3. Patents
  4. Method to generate multi-channel audio signals from stereo signals
 
patent

Method to generate multi-channel audio signals from stereo signals

Faller, Christof
2007

A perceptually motivated spatial decomposition for two-channel stereo audio signals, capturing the information about the virtual sound stage, is proposed. The spatial decomposition allows to re-synthesize audio signals for playback over other sound systems than two-channel stereo. With the use of more front loudspeakers, the width of the virtual sound stage can be increased beyond +/- 30 DEG and the sweet spot region is extended. Optionally, lateral independent sound components can be played back separately over loudspeakers on the two sides of a listener to increase listener envelopment. It is also explained how the spatial decomposition can be used with surround sound and wavefield synthesis based audio system.; According to the main embodiment of the invention applying to multiple audio signals, it is proposed to generate multiple output audio signals (y1,..., yM) from multiple input audio signals (x1, ..., xL), in which the number of output is equal or higher than the number of input signals , this method comprising the steps of :; - by means of linear combinations of the input subbands X1(i), ..., XL(i), computing one or more independent sound subbands representing signal components which are independent between the input subbands, - by means of linear combinations of the input subbands X1(i), ..., XL(i), computing one or more localized direct sound subbands representing signal components which are contained in more than one of the input subbands and direction factors representing the ratios with which these signal components are contained in two or more input subbands, - generating the output subband signals, Y1(i)...YM(i), where each output subband signal is a linear combination of the independent sound subbands and the localized direct sound subbands - converting the output subband signals,Y1(i)...YM(i), to time domain audio signals, y1...yM.

  • Details
  • Metrics
Type
patent
EPO Family ID

35820407

Author(s)
Faller, Christof
Note

Alternative title(s) : (de) Methode zur generation eines multikanalaudiosignals aus stereosignalen (fr) Méthode pour générer de l'audio multi-canaux à partir de signaux stéréo

TTO classification

TTO:6.0572

EPFL units
AVP-R-TTO  
IdentifierCountry codeKind codeDate issued

KR101341523

KR

B1

2013-12-16

US8295493

US

B2

2012-10-23

CN101341793

CN

B

2010-08-04

CN101341793

CN

A

2009-01-07

US2008267413

US

A1

2008-10-30

KR20080042160

KR

A

2008-05-14

WO2007026025

WO

A3

2007-04-26

WO2007026025

WO

A2

2007-03-08

EP1761110

EP

A1

2007-03-07

Available on Infoscience
June 13, 2017
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/138338
Logo EPFL, École polytechnique fédérale de Lausanne
  • Contact
  • infoscience@epfl.ch

  • Follow us on Facebook
  • Follow us on Instagram
  • Follow us on LinkedIn
  • Follow us on X
  • Follow us on Youtube
AccessibilityLegal noticePrivacy policyCookie settingsEnd User AgreementGet helpFeedback

Infoscience is a service managed and provided by the Library and IT Services of EPFL. © EPFL, tous droits réservés