EP 1258146 A2 20021120 - COMPRESSED VIDEO ANALYSIS
Title (en)
COMPRESSED VIDEO ANALYSIS
Title (de)
ANALYSE VON KOMPRIMIERTEM VIDEO
Title (fr)
ANALYSE DE VIDEO COMPRIMEE
Publication
Application
Priority
- US 0106094 W 20010226
- US 51240600 A 20000224
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
IPC 8 full level
H04N 5/76 (2006.01); H04N 5/91 (2006.01); H04N 7/26 (2006.01); H04N 7/36 (2006.01)
CPC (source: EP)
H04N 19/142 (2014.11); H04N 19/179 (2014.11); H04N 19/48 (2014.11); H04N 19/503 (2014.11); H04N 19/87 (2014.11); H04N 19/90 (2014.11)
Citation (search report)
See references of WO 0163937A2
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
WO 0163937 A2 20010830; WO 0163937 A3 20020131; EP 1258146 A2 20021120; JP 2003533906 A 20031111
DOCDB simple family (application)
US 0106094 W 20010226; EP 01913054 A 20010226; JP 2001562030 A 20010226