EP 3577649 A4 20201111 - STEREO AUDIO SIGNAL ENCODER
Title (en)
STEREO AUDIO SIGNAL ENCODER
Title (de)
CODIERER EINES STEREOAUDIOSIGNALS
Title (fr)
CODEUR DE SIGNAL AUDIO STÉRÉO
Publication
Application
Priority
- GB 201701594 A 20170131
- FI 2018050018 W 20180111
Abstract (en)
[origin: GB2559199A] An adaptive stereo audio signal encoder/decoder receives multichannel audio frames, determines difference parameters (553, eg. gain, interphase difference, residual prediction gain), generates index values from initial scalar quantized parameters (451) and index maps for reordering the index values, and encodes the reordered index values to generate a single (mono) channel 555. Increasing the coding efficiency of these parameters means reducing the bitrate of the extension and using the saved bits for better encoding of the mono downmix. Golomb-Rice (GR) encoding 455 then allows efficient voice coding of the single (mono) channel, and subsequent decoding (figs 9 & 10).
IPC 8 full level
G10L 19/008 (2013.01); G10L 19/02 (2013.01); H03M 7/40 (2006.01); G10L 19/035 (2013.01)
CPC (source: EP GB)
G10L 19/0017 (2013.01 - EP); G10L 19/008 (2013.01 - EP); G10L 19/035 (2013.01 - GB); G10L 19/24 (2013.01 - GB); G10L 19/035 (2013.01 - EP)
Citation (search report)
- [I] US 2016027445 A1 20160128 - VASILACHE ADRIANA [FI], et al
- [A] US 2015194160 A1 20150709 - MULTRUS MARKUS [DE], et al
- [A] US 2005015249 A1 20050120 - MEHROTRA SANJEEV [US], et al
- [A] WO 2014013294 A1 20140123 - NOKIA CORP [FI], et al
- See references of WO 2018142018A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
GB 201701594 D0 20170315; GB 2559199 A 20180801; EP 3577649 A1 20191211; EP 3577649 A4 20201111; EP 3577649 B1 20230510; ES 2946235 T3 20230714; WO 2018142018 A1 20180809
DOCDB simple family (application)
GB 201701594 A 20170131; EP 18747600 A 20180111; ES 18747600 T 20180111; FI 2018050018 W 20180111