Global Patent Index - EP 1266455 A4

EP 1266455 A4 2003-06-18 - METHOD AND APPARATUS FOR OPTIMIZED LOSSLESS COMPRESSION USING A PLURALITY OF CODERS

Title (en)

METHOD AND APPARATUS FOR OPTIMIZED LOSSLESS COMPRESSION USING A PLURALITY OF CODERS

Title (de)

VERFAHREN UND VORRICHTUNG ZUR OPTIMIERTEN VERLUSTLOSEN KOMPRIMIERUNG MIT MEHREREN CODIERERN

Title (fr)

PROCEDE ET APPAREIL DE COMPRESSION SANS PERTE OPTIMISES A L'AIDE D'UNE PLURALITE DE CODEURS

Publication

EP 1266455 A4 (EN)

Application

EP 01912942 A

Priority

  • US 0105722 W
  • US 51330900 A

Abstract (en)

[origin: WO0163772A1] A method of lossless compression of a stream of data first includes using a plurality of lossless coders to compress a test portion of the data stream (30). Once the test portion is compressed, the method determines a performance characteristic(s) associated with each of the lossless coders (32). Then the method selects one of the lossless coders based on the performance characteristic(s) and encodes a first portion of the data stream with the selected coder. Thereafter, the method includes repeating the using, determining, selecting and encoding steps for another test portion and a second portion of the data stream. Notably, the repeating step may include selecting a different one of the lossless coders.

IPC 1-7 (main, further and additional classification)

H03M 7/34; H03M 7/30; H04N 1/415

IPC 8 full level (invention and additional information)

H03M 7/40 (2006.01); H03M 7/30 (2006.01)

CPC (invention and additional information)

H03M 7/30 (2013.01)

Citation (search report)

  • [XY] WO 9748212 A1 19971218 - NOKIA TELECOMMUNICATIONS OY [FI], et al
  • [XY] US 5708511 A 19980113 - GANDHI BHAVAN R [US], et al
  • [X] EP 0405572 A2 19910102 - FUJITSU LTD [JP]
  • [X] HSU W H ET AL: "AUTOMATIC SYNTHESIS OF COMPRESSION TECHNIQUES FOR HETEROGENEOUS FILES", SOFTWARE PRACTICE & EXPERIENCE, JOHN WILEY & SONS LTD. CHICHESTER, GB, vol. 25, no. 10, 1 October 1995 (1995-10-01), pages 1097 - 1116, XP000655539, ISSN: 0038-0644
  • See also references of WO 0163772A1

Designated contracting state (EPC)

DE FR GB

EPO simple patent family

WO 0163772 A1 20010830; AU 4167201 A 20010903; CN 1426629 A 20030625; EP 1266455 A1 20021218; EP 1266455 A4 20030618; JP 2003524983 A 20030819; TW I273779 B 20070211

INPADOC legal status


2007-04-11 [18D] APPLICATION DEEMED TO BE WITHDRAWN

- Effective date: 20061013

2004-05-26 [RBV] DESIGNATED CONTRACTING STATES (CORRECTION)

- Designated State(s): DE FR GB

2004-04-28 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20040315

2003-06-18 [A4] DESPATCH OF SUPPLEMENTARY SEARCH REPORT

- Effective date: 20030508

2003-06-18 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: 7H 03M 7/34 A

2003-06-18 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: 7H 04N 1/415 B

2003-06-18 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: 7H 03M 7/30 B

2003-01-15 [RIN1] INVENTOR CHANGED BEFORE GRANT

- Inventor name: TERNOVSKIY, IGOR, V.

2003-01-15 [RIN1] INVENTOR CHANGED BEFORE GRANT

- Inventor name: DEVIVYE, ALEKSANDR, A.

2003-01-15 [RIN1] INVENTOR CHANGED BEFORE GRANT

- Inventor name: LIN, FREDDIE

2002-12-18 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20020920

2002-12-18 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

2002-12-18 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO:

- Free text: AL;LT;LV;MK;RO;SI