Global Patent Index - EP 1258146 A2

EP 1258146 A2 2002-11-20 - COMPRESSED VIDEO ANALYSIS

Title (en)

COMPRESSED VIDEO ANALYSIS

Title (de)

ANALYSE VON KOMPRIMIERTEM VIDEO

Title (fr)

ANALYSE DE VIDEO COMPRIMEE

Publication

EP 1258146 A2 (EN)

Application

EP 01913054 A

Priority

  • US 0106094 W
  • US 51240600 A

Abstract (en)

[origin: WO0163937A2] A compressed digital video bitstream is partially decoded to extract certain data (e.g., inter/intra block field data, motion vector data, and/or DCT coefficient data). The extracted data is then analyzed (for a single frame or over multiple frames) to characterize picture content. For example, the inter/intra block field data can be analyzed to detect the existence of scene changes and camera switches. In addition to inter/intra block field data, patterns in the motion vector data can also be characterized to detect the existence of camera pans and zooms and the occurrence of persons/objects moving within or entering or leaving a scene. Intra/inter block field data and motion vector data can also be used to detect the occurrence of still text, slides, and pictures within a compressed bitstream. In addition, DCT coefficient data can be used to detect the existence of text and raster displays within the field of view.

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

H04N 7/26

IPC 8 full level (invention and additional information)

H04N 5/76 (2006.01); H04N 5/91 (2006.01); H04N 7/26 (2006.01); H04N 7/36 (2006.01)

CPC (invention and additional information)

H04N 19/90 (2014.11); H04N 19/142 (2014.11); H04N 19/179 (2014.11); H04N 19/48 (2014.11); H04N 19/503 (2013.01); H04N 19/87 (2014.11)

Citation (search report)

See references of WO 0163937A3

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

EPO simple patent family

WO 0163937 A2 20010830; WO 0163937 A3 20020131; EP 1258146 A2 20021120; JP 2003533906 A 20031111

INPADOC legal status


2003-03-05 [18W] WITHDRAWN

- Effective date: 20030113

2002-11-20 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20020815

2002-11-20 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A2

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

2002-11-20 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

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