| 54 |
Title |
TI |
[EN] AUDIO SIGNAL DECORRELATOR |
| 71/73 |
Applicant/owner |
PA |
FRAUNHOFER GES FORSCHUNG, DE
|
| 72 |
Inventor |
IN |
BUCHNER HERBERT, DE
;
HERRE JURGEN, DE
|
| 22/96 |
Application date |
AD |
Mar 28, 2007 |
| 21 |
Application number |
AN |
20087025014 |
|
Country of application |
AC |
KR |
|
Publication date |
PUB |
Dec 30, 2008 |
33
31
32 |
Priority data |
PRC
PRN
PRD |
EP
06007833
Apr 13, 2006
|
33
31
32 |
PRC
PRN
PRD |
EP
06012271
Jun 14, 2006
|
| 51 |
IPC main class |
ICM |
G10L 19/00
(2006.01)
|
| 51 |
IPC secondary class |
ICS |
|
|
IPC additional class |
ICA |
|
|
IPC index class |
ICI |
|
|
Cooperative patent classification |
CPC |
G10L 19/008
G10L 2021/02082
G10L 21/0208
H04M 9/08
H04M 9/082
|
|
MCD main class |
MCM |
H04M 9/08
(2006.01)
|
|
MCD secondary class |
MCS |
G10L 19/008
(2013.01)
G10L 19/00
(2006.01)
G10L 21/02
(2006.01)
|
|
MCD additional class |
MCA |
G10L 21/0208
(2013.01)
|
| 57 |
Abstract |
AB |
[EN] An audio signal decorrelator (100) for deriving an output audio signal (170) from an input audio signal (112) comprises a frequency analyzer (110) for extracting a first partial signal (120) and a second partial signal (122) from the input audio signal, the first partial signal being descriptive of an audio content in a first audio frequency range, the second partial signal being descriptive of an audio content in a second audio frequency range, the first audio frequency range having higher frequencies compared to the second audio frequency range. The audio signal decorrelator further comprises a partial signal modifier (140) for modifying the first partial signal, to obtain a first processed partial signal (150), and the second partial signal, to obtain a second processed partial signal (152), so that a modulation amplitude of a time variant phase shift or time variant delay applied to the first partial signal is higher than a modulation amplitude of a time variant phase shift or a time variant delay applied to the second partial signal, or for modifying only the first partial signal, so that a time variant phase shift or a time variant delay is applied to the first partial signal. The audio signal decorrelator further comprises a signal combiner (160) for combining the first processed partial signal and the second processed partial signal, or for combining the first processed partial signal and the second partial signal, to obtain an output audio signal (170). The audio signal decorrelator allows for an efficient decorrelation of audio signals, which is adapted to the human auditory perception. ® KIPO & WIPO 2009 |
| 56 |
Cited documents identified in the search |
CT |
|
| 56 |
Cited documents indicated by the applicant |
CT |
|
| 56 |
Cited non-patent literature identified in the search |
CTNP |
|
| 56 |
Cited non-patent literature indicated by the applicant |
CTNP |
|
|
Citing documents |
|
Determine documents
|
|
Sequence listings |
|
|
|
Search file IPC |
ICP |
G10L 19/00
|
