EP 1131928 A1 20010912 - BLOCK JOINT SOURCE-CHANNEL CODING
Title (en)
BLOCK JOINT SOURCE-CHANNEL CODING
Title (de)
GEMEINSAME BLOCKFÖRMIGE QUELLEN- UND KANALCODIERUNG
Title (fr)
CODAGE SOURCE-CANAL CONJOINT EN BLOCS
Publication
Application
Priority
FR 9902241 W 19990921
Abstract (en)
[origin: WO0122676A1] The invention concerns joint source-channel coding comprising quantization and phase modulation with a constellation of NC points. The constellation of the phase modulation is a rotated constellation (CC) derived from a predetermined rotation of a uniform phase constellation with NC points such that the NC points of the constellation are projected on any one of the axes (O-X1, O-X2) of the constellation in NC projections all different from one another. The quantization provides a non-uniform quantization law (CS) of NS levels which are NS projections among NC different projections of the rotated constellation (CC). Such coding can be used in particular in a speech encoder for mobile radio communication cellular system to reduce transmission channel band width.
IPC 1-7
IPC 8 full level
G10L 19/113 (2013.01); H03M 13/25 (2006.01); H04L 27/18 (2006.01); H04L 27/34 (2006.01)
CPC (source: EP)
G10L 19/113 (2013.01); H03M 13/25 (2013.01); H03M 13/63 (2013.01); H03M 13/6594 (2013.01); H04L 27/183 (2013.01); H04L 27/3488 (2013.01)
Citation (search report)
See references of WO 0122676A1
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
DOCDB simple family (application)
FR 9902241 W 19990921; EP 99943017 A 19990921