Global Patent Index - EP 1057344 A1

EP 1057344 A1 2000-12-06 - ADAPTIVE BUFFER AND QUANTIZER REGULATION SCHEME FOR BANDWIDTH SCALABILITY OF VIDEO DATA

Title (en)

ADAPTIVE BUFFER AND QUANTIZER REGULATION SCHEME FOR BANDWIDTH SCALABILITY OF VIDEO DATA

Title (de)

ADAPTIVE PUFFERSPEICHER- UND QUANTISIERERREGELUNG FÜR ANGEPASSTEN BANDBREITENBEDARF IN EINEM VIDEODATENÜBERTRAGUNGSSYSTEM

Title (fr)

SYSTEME ADAPTATIF DE REGULATION DE TAMPON ET DE NUMERISEUR POUR ECHELONNABILITE DE LARGEUR DE BANDE DE DONNEES VIDEO

Publication

EP 1057344 A1 (EN)

Application

EP 99967977 A

Priority

  • EP 9910223 W
  • US 21983298 A

Abstract (en)

[origin: WO0040032A1] A method and apparatus for processing and encoding video data is presented that controls a quantization process based on a selection of differing performance objectives. When the communication channel that is used to communicate the encoded video data has a limited bandwidth, a balance must be struck between performance objectives to provide an acceptable image quality at an acceptable image update rate. Consistent image quality is provided by controlling the quantization process based on a set of quantizing parameters that include, for example, an initial value and bounds for the quantizing factor that is applied to each frame of the video data. Additionally, the quantizing parameters are modifiable by a user to achieve a user-determinable balance, based on the user's preference for image quality or image update rate. The user-determinable balance is achieved by a suitable modification of the video frame rate and the quantizing parameters commensurate with the selected frame rate.

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

H04N 7/50; H04N 7/30

IPC 8 full level (invention and additional information)

H04N 7/26 (2006.01); G06T 9/00 (2006.01); H03M 7/30 (2006.01); H03M 7/40 (2006.01); H04N 7/15 (2006.01); H04N 7/24 (2011.01); H04N 7/30 (2006.01)

CPC (invention and additional information)

H04N 21/658 (2013.01); H04N 19/103 (2014.11); H04N 19/115 (2014.11); H04N 19/126 (2014.11); H04N 19/152 (2014.11); H04N 19/159 (2013.01); H04N 19/162 (2014.11); H04N 19/164 (2014.11); H04N 19/172 (2013.01); H04N 19/197 (2014.11); H04N 19/60 (2014.11); H04N 21/6377 (2013.01)

Citation (search report)

See references of WO 0040032A1

Designated contracting state (EPC)

DE FR GB

EPO simple patent family

WO 0040032 A1 20000706; EP 1057344 A1 20001206; JP 2002534864 A 20021015

INPADOC legal status


2004-07-21 [18W] WITHDRAWN

- Effective date: 20040601

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

- Designated State(s): DE FR GB

2001-03-14 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20010108

2000-12-06 [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