| 54 |
Title |
TI |
[EN] Transmission system comprising a sub-band echo canceller which includes a sub-band coding arrangement |
| 71/73 |
Applicant/owner |
PA |
PHILIPS CORP, US
|
| 72 |
Inventor |
IN |
KELLERMANN WALTER, DE
|
| 22/96 |
Application date |
AD |
Dec 16, 1994 |
| 21 |
Application number |
AN |
35932794 |
|
Country of application |
AC |
US |
|
Publication date |
PUB |
Mar 19, 1996 |
33
31
32 |
Priority data |
PRC
PRN
PRD |
DE
4227327
Aug 18, 1992
|
33
31
32 |
PRC
PRN
PRD |
US
10600893
Aug 13, 1993
|
| 51 |
IPC main class |
ICM |
H04L 23/00
|
| 51 |
IPC secondary class |
ICS |
H04J 1/00
H04M 1/24
|
|
IPC additional class |
ICA |
|
|
IPC index class |
ICI |
|
|
Cooperative patent classification |
CPC |
H04B 3/21
H04B 7/015
|
|
MCD main class |
MCM |
H04B 3/20
(2006.01)
|
|
MCD secondary class |
MCS |
H04B 14/04
(2006.01)
H04B 3/21
(2006.01)
|
|
MCD additional class |
MCA |
|
| 57 |
Abstract |
AB |
[EN] Transmission system comprising a sub-band echo canceller which includes a sub-band coding arrangement. The invention relates to a transmission system comprising a sub-band echo canceller which includes a canceller that can be switched between a receive path (r) and a send path (s). To reduce the computational complexity as well as the signal delays also with sub-band coding or sub-band decoding, the sub-band coding arrangement comprises a synthesis filter bank and an analysis filter bank which are provided for sub-band coding and also for sub-band echo cancellation. Advantageous applications for the echo canceller are subscriber terminal units, for example, hands-free facilities for car telephones, videophones or video conference units which have an echo path formed by at least one microphone and at least one loudspeaker. |
| 56 |
Cited documents identified in the search |
CT |
JP000H04123606A
US000004827472A
US000004979188A
US000005272695A
US000005297163A
US000005315585A
US000005448555A
|
| 56 |
Cited documents indicated by the applicant |
CT |
|
| 56 |
Cited non-patent literature identified in the search |
CTNP |
Advances in Speech Signal Processing , by S. Fair and M. Sondhi, pp. 327 356. 0
|
| 56 |
Cited non-patent literature indicated by the applicant |
CTNP |
|
|
Citing documents |
|
Determine documents
|
|
Sequence listings |
|
|
|
Search file IPC |
ICP |
H04L 23/00
|
