Global Patent Index - EP 1266455 A4

EP 1266455 A4 20030618 - 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 20030618 (EN)

Application

EP 01912942 A 20010222

Priority

  • US 0105722 W 20010222
  • US 51330900 A 20000225

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

H03M 7/34; H04N 1/415; H03M 7/30

IPC 8 full level

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

CPC (source: EP)

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 references of WO 0163772A1

Designated contracting state (EPC)

DE FR GB

DOCDB simple family (publication)

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

DOCDB simple family (application)

US 0105722 W 20010222; AU 4167201 A 20010222; CN 01808587 A 20010222; EP 01912942 A 20010222; JP 2001562848 A 20010222; TW 90104613 A 20010226