EP 1048174 A4 20040407 - PARTIAL DECODING OF COMPRESSED VIDEO SEQUENCES
Title (en)
PARTIAL DECODING OF COMPRESSED VIDEO SEQUENCES
Title (de)
PARTIELLES DEKODIEREN VON KOMPRIMIERTEN VIDEOSEQUENZEN
Title (fr)
DECODAGE PARTIEL DE SEQUENCES VIDEO COMPRIMEES
Publication
Application
Priority
- US 9827223 W 19981222
- US 6877497 P 19971223
- US 10574698 A 19980626
Abstract (en)
[origin: WO9933275A1] Compressed video sequences generated using a (e.g., DCT) transform are partially decoded (202) to recover (204) the low-frequency transform coefficients (e.g., only the DC coefficients) from the encoded bitstream. The low-frequency coefficients are then used to generate blocks of image data that are subjected to motion-compensated inter-frame addition (206) to generate partially decoded images that can be used for subsequent processing, such as histogram analysis (208) for video parsing. The present invention avoids having to perform the computationally expensive inverse transform operations, while still achieving satisfactory results.
IPC 1-7
IPC 8 full level
H04N 5/14 (2006.01); H04N 7/26 (2006.01); H04N 7/30 (2006.01); H04N 7/32 (2006.01); H04N 7/46 (2006.01); G11B 27/28 (2006.01)
CPC (source: EP KR)
H04N 5/147 (2013.01 - EP); H04N 19/142 (2014.11 - EP); H04N 19/179 (2014.11 - EP); H04N 19/23 (2014.11 - KR); H04N 19/59 (2014.11 - EP); H04N 19/60 (2014.11 - EP); H04N 19/87 (2014.11 - EP); G11B 27/28 (2013.01 - EP)
Citation (search report)
- [X] US 5262854 A 19931116 - NG SHEAU-BAO [US]
- [XY] VETRO A ET AL: "Frequency domain down-conversion of HDTV using adaptive motion compensation", IMAGE PROCESSING, 1997. PROCEEDINGS., INTERNATIONAL CONFERENCE ON SANTA BARBARA, CA, USA 26-29 OCT. 1997, LOS ALAMITOS, CA, USA,IEEE COMPUT. SOC, US, 26 October 1997 (1997-10-26), pages 763 - 766, XP010254068, ISBN: 0-8186-8183-7
- [Y] YEO B-L ET AL: "RAPID SCENE ANALYSIS ON COMPRESSED VIDEO", IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY, IEEE INC. NEW YORK, US, vol. 5, no. 6, 1 December 1995 (1995-12-01), pages 533 - 544, XP000545960, ISSN: 1051-8215
- See references of WO 9933275A1
Designated contracting state (EPC)
DE FR GB NL
DOCDB simple family (publication)
WO 9933275 A1 19990701; AU 1937799 A 19990712; CA 2310652 A1 19990701; CA 2310652 C 20080722; EP 1048174 A1 20001102; EP 1048174 A4 20040407; JP 2001527352 A 20011225; KR 20010033550 A 20010425
DOCDB simple family (application)
US 9827223 W 19981222; AU 1937799 A 19981222; CA 2310652 A 19981222; EP 98964199 A 19981222; JP 2000526055 A 19981222; KR 20007007059 A 20000623