Global Patent Index - EP 2022046 A1

EP 2022046 A1 2009-02-11 - CONVERSION BETWEEN SUBBAND FIELD REPRESENTATIONS FOR TIME-DEPENDENT FILTER BANKS

Title (en)

CONVERSION BETWEEN SUBBAND FIELD REPRESENTATIONS FOR TIME-DEPENDENT FILTER BANKS

Title (de)

UMWANDLUNG ZWISCHEN SUBBANDFELDDARSTELLUNGEN FÜR ZEITABHÄNGIGE FILTERBANKEN

Title (fr)

CONVERSION ENTRE REPRESENTATIONS EN DOMAINES DE SOUS-BANDES POUR DES BANCS DE FILTRES VARIANT DANS LE TEMPS

Publication

EP 2022046 A1 (FR)

Application

EP 07766042 A

Priority

  • FR 2007051266 W
  • FR 0604507 A

Abstract (en)

[origin: WO2007135319A1] Conversion between sub-band field representations for time-dependent filter banks. The invention relates to a transcoding processing operation between different sub-band fields, aiming to compact the application of a first vector representing the signal in a first sub-band field to a synthesis filter bank, and then to an analysis filter bank, in order to obtain a second vector representing the signal in a second sub-band field. In particular, the synthesis bank and /or the analysis bank are time-dependent. Within the scope of the invention, matrix filtering of the first vector is anticipated in order to directly obtain the second vector, this matrix filtering being represented by a global conversion matrix comprising pre-calculated sub-blocks of matrices (A<SUB>i0</SUB>, , A<SUB>ip2-1</SUB>) taking into consideration possible time-dependent variations in the filter banks, then stored into memory. The global conversion matrix is then constructed by calls to the memory in order to obtain the sub-blocks at pre-calculated successive instants.

IPC 8 full level (invention and additional information)

G10L 19/14 (2006.01); G10L 19/02 (2006.01); G10L 19/16 (2013.01)

CPC (invention and additional information)

G10L 19/173 (2013.01); G10L 19/0208 (2013.01)

Citation (search report)

See references of WO 2007135319A1

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 MT NL PL PT RO SE SI SK TR

Designated extension state (EPC)

AL BA HR MK RS

EPO simple patent family

FR 2901433 A1 20071123; EP 2022046 A1 20090211; US 2009307294 A1 20091210; WO 2007135319 A1 20071129

INPADOC legal status


2012-04-11 [18D] APPLICATION DEEMED TO BE WITHDRAWN

- Effective date: 20111018

2011-06-29 [DAX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT (TO ANY COUNTRY) (DELETED)

2011-01-19 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20101215

2009-02-11 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20081121

2009-02-11 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR

2009-02-11 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO:

- Countries: AL BA HR MK RS