Global Patent Index - EP 1048174 A1

EP 1048174 A1 2000-11-02 - 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

EP 1048174 A1 (EN)

Application

EP 98964199 A

Priority

  • US 9827223 W
  • US 6877497 P
  • US 10574698 A

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 (main, further and additional classification)

H04N 5/14; H04N 7/46; H04N 7/50

IPC 8 full level (invention and additional information)

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 (invention and additional information)

H04N 5/147 (2013.01); H04N 19/142 (2014.11); H04N 19/179 (2014.11); H04N 19/59 (2014.11); H04N 19/60 (2014.11); H04N 19/87 (2014.11); G11B 27/28 (2013.01)

Designated contracting state (EPC)

DE FR GB NL

EPO simple patent family

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

INPADOC legal status


2006-01-25 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20050712

2005-04-13 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20050301

2004-04-07 [A4] SUPPLEMENTARY SEARCH REPORT

- Effective date: 20040224

2004-04-07 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: 7H 04N 5/14 A

2004-04-07 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: 7H 04N 7/50 B

2004-04-07 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: 7H 04N 7/46 B

2000-11-02 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000628

2000-11-02 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): DE FR GB NL