EP 1504441 A4 20051214 - TRANSCODING OF SPEECH IN A PACKET NETWORK ENVIRONMENT
Title (en)
TRANSCODING OF SPEECH IN A PACKET NETWORK ENVIRONMENT
Title (de)
TRANSCODIEREN VON SPRACHE IN EINER PAKETNETZWERKUMGEBUNG
Title (fr)
TRANSCODAGE DE LA VOIX DANS UN ENVIRONNEMENT DE RESEAU A COMMUTATION PAR PAQUETS
Publication
Application
Priority
- US 0306335 W 20030226
- US 14553302 A 20020513
Abstract (en)
[origin: WO03098598A1] There is provided transcoding of speech in a packet network environment. A decoder configured to receive a first bit-stream encoded according to a first coding scheme. The decoder decodes the bit-stream according to the first coding scheme, generates a plurality of first speech samples, and extracts a plurality of first speech parameters, which may include spectral characteristics, energy, pitch and/or pitch gain. A converter then converts the plurality first speech samples and plurality of first speech parameters to a plurality of second speech samples and a plurality of second speech parameters for use according to a second coding scheme. The first and second coding schemes may be, for example, G.711, G.723.1, G.726 or G.729, and may be parametric or non-parametric. An encoder receives the plurality of second speech samples and plurality of second speech parameters and generates a second bit-stream according to the second coding scheme.
IPC 1-7
IPC 8 full level
G10L 19/16 (2013.01); H04W 88/18 (2009.01)
CPC (source: EP KR)
G10L 19/00 (2013.01 - KR); G10L 19/173 (2013.01 - EP); G10L 25/03 (2013.01 - KR); H03M 7/30 (2013.01 - KR); H04L 12/66 (2013.01 - KR); H04W 88/181 (2013.01 - EP)
Citation (search report)
- [XY] WO 0048170 A1 20000817 - QUALCOMM INC [US]
- [Y] US 6144935 A 20001107 - CHEN JUIN-HWEY [US], et al
- [X] WO 9900791 A1 19990107 - NORTHERN TELECOM LTD [CA]
- [A] EP 1126439 A2 20010822 - LUCENT TECHNOLOGIES INC [US]
- See references of WO 03098598A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT SE SI SK TR
DOCDB simple family (publication)
WO 03098598 A1 20031127; AU 2003217859 A1 20031202; CN 1653515 A 20050810; EP 1504441 A1 20050209; EP 1504441 A4 20051214; IL 165147 A0 20051218; JP 2005531017 A 20051013; KR 20040104701 A 20041210
DOCDB simple family (application)
US 0306335 W 20030226; AU 2003217859 A 20030226; CN 03810962 A 20030226; EP 03713828 A 20030226; IL 16514704 A 20041110; JP 2004506009 A 20030226; KR 20047017694 A 20030226