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1. (CA2744459) SURROUND SOUND VIRTUALIZER AND METHOD WITH DYNAMIC RANGE COMPRESSION

Office : Canada
Application Number: 2744459 Application Date: 01.12.2009
Publication Number: 2744459 Publication Date: 01.07.2010
Grant Number: Grant Date: 14.06.2016
Publication Kind : C
Prior PCT appl.: Application Number:PCTUS2009066230 ; Publication Number: Click to see the data
IPC:
H04S 3/00
H04S 1/00
H04S 3/02
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
S
STEREOPHONIC SYSTEMS
3
Systems employing more than two channels, e.g. quadraphonic
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
S
STEREOPHONIC SYSTEMS
1
Two-channel systems
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
S
STEREOPHONIC SYSTEMS
3
Systems employing more than two channels, e.g. quadraphonic
02
of the matrix type, i.e. in which input signals are combined algebraically, e.g. after having been phase shifted with respect to each other
Applicants: DOLBY LABORATORIES LICENSING CORPORATION
Inventors:
Priority Data: 61/122,647 15.12.2008 US
Title: (EN) SURROUND SOUND VIRTUALIZER AND METHOD WITH DYNAMIC RANGE COMPRESSION
(FR) VIRTUALISEUR DE SON SURROUND ET PROCEDE AVEC COMPRESSION DE PLAGE DYNAMIQUE
Abstract: front page image
(EN)

Method and system for generating
output signals for reproduction by two physical
speakers in response to input audio signals indicative
of sound from multiple source locations including
at least two rear locations. Typically, the
input signals are indicative of sound from three
front locations and two rear locations (left and
right surround sources). A virtualizer generates left
and right surround outputs useful for driving front
loudspeakers to emit sound that a listener perceives
as emitting from rear sources. Typically, the virtualizer
generates left and right surround outputs by
transforming rear source inputs in accordance with
a head- related transfer function. To ensure that
virtual channels are well heard in the presence of
other channels, the virtualizer performs dynamic
range compression on rear source inputs. The dynamic
range compression is preferably accomplished
by amplifying rear source inputs or partially
processed versions thereof in a nonlinear way
relative to front source inputs.




Also published as:
UAa201108880IL212895EP2374288SG171324US20110243338CN102246544
RU2011129155RU0002491764BRPI0923440AU2009330534VN27600ID051.3535
MYPI 2011002734WO/2010/074893