Global Patent Index - EP 1905034 A4

EP 1905034 A4 20091125 - VIRTUAL SOURCE LOCATION INFORMATION BASED CHANNEL LEVEL DIFFERENCE QUANTIZATION AND DEQUANTIZATION METHOD

Title (en)

VIRTUAL SOURCE LOCATION INFORMATION BASED CHANNEL LEVEL DIFFERENCE QUANTIZATION AND DEQUANTIZATION METHOD

Title (de)

AUF VIRTUELLEN QUELLENPOSITIONSINFORMATIONEN BASIERTES VERFAHREN ZUR QUANTISIERUNG UND DEQUANTISIERUNG VON KANALNIVEAUUNTERSCHIEDEN

Title (fr)

PROCEDE DE QUANTIFICATION ET DE DEQUANTIFICATION DE LA DIFFERENCE DE NIVEAUX DE CANAL BASEE SUR LES INFORMATIONS DE LOCALISATION DE SOURCES VIRTUELLES

Publication

EP 1905034 A4 20091125 (EN)

Application

EP 06783342 A 20060719

Priority

  • KR 2006002824 W 20060719
  • KR 20050065515 A 20050719
  • KR 20050096256 A 20051012
  • KR 20060066822 A 20060718

Abstract (en)

[origin: WO2007011157A1] Methods for Spatial Audio Coding (SAC) of a multi-channel audio signal and decoding of an audio bitstream generated by the SAC are provided. More particularly, methods of efficient quantization and dequantization of Channel Level Difference (CLD) used as a spatial parameter when SAC -based encoding of a multi-channel audio signal is performed are provided. A method of CLD quantization includes extracting sub-band-specific CLDs from an N-channel audio signal (N>1), and quantizing the CLDs by reference to a Virtual Source Location Information (VSLI)-based CLD quantization table designed using CLD quantization values derived from VSLI quantization values of the N-channel audio signal.

IPC 8 full level

G11B 20/10 (2006.01); G10L 19/00 (2006.01); G10L 19/008 (2013.01); G10L 19/02 (2006.01); G10L 19/032 (2013.01)

CPC (source: EP)

G10L 19/008 (2013.01); G10L 19/032 (2013.01)

Citation (search report)

  • [I] JEONGIL SEO ET AL: "A New Cue Parameter for Spatial Audio Coding", JOINT VIDEO TEAM (JVT) OF ISO/IEC MPEG & ITU-T VCEG(ISO/IEC JTC1/SC29/WG11 AND ITU-T SG16 Q6), XX, XX, no. M11264, 13 October 2004 (2004-10-13), XP030040038
  • [A] FALLER C ET AL: "BINAURAL CUE CODING APPLIED TO STEREO AND MULTI-CHANNEL AUDIO COMPRESSION", PREPRINTS OF PAPERS PRESENTED AT THE AES CONVENTION, XX, XX, vol. 112, no. 5574, 10 May 2002 (2002-05-10), XP009024737
  • [A] VAN DER WAAL R G ET AL: "Subband coding of stereophonic digital audio signals", SPEECH PROCESSING 1. TORONTO, MAY 14 - 17, 1991; [INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH & SIGNAL PROCESSING. ICASSP], NEW YORK, IEEE, US, vol. CONF. 16, 14 April 1991 (1991-04-14), pages 3601 - 3604, XP010043648, ISBN: 9780780300033
  • [T] KWANKI KIM ET AL: "Improved Channel Level Difference Quantization for Spatial Audio Coding", ETRI JOURNAL, vol. 29, no. 1, February 2007 (2007-02-01), pages 99 - 102, XP002549876, Retrieved from the Internet <URL:http://etrij.etri.re.kr/Cyber/servlet/BrowseAbstract?paperid=LP0608-0149> [retrieved on 20091012]
  • See references of WO 2007011157A1

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

DOCDB simple family (publication)

WO 2007011157 A1 20070125; EP 1905034 A1 20080402; EP 1905034 A4 20091125; EP 1905034 B1 20110601

DOCDB simple family (application)

KR 2006002824 W 20060719; EP 06783342 A 20060719