Title:
VIDEO COMPRESSION USING ANALYTICAL ENTROPY CODING
Document Type and Number:
WIPO Patent Application WO2003067763
Kind Code:
A3
Abstract:
Apparatus and method for quantizing and entropy encoding transform coefficients in the encoding of multimedia data, for example video and audio data. Pixel value data is input into a decorrelator (302). The decorrelator generates reduced transform coefficients. A quantizer (304), for example a bit plane slicer, is used to remove irrelevant data from the reduced coefficients. Statistical dependencies in the bit planes are exploited by the application of a context selection means (308), which in turn generates multilevel context paths. The multilevel context paths are input into an entropy encoding mechanism (310). In one embodiment, the entropy encoding mechanism comprises: a run-length pre-coder (312), for receiving input data at each context level and outputs run-length symbols; and an analytical entropy coder (314), which receives the symbols and generates a compressed data stream. The above stages are reversed in decoding.
Inventors:
ILLGNER-FEHNS KLAUS (DE)
Application Number:
PCT/EP2003/001130
Publication Date:
December 18, 2003
Filing Date:
February 05, 2003
Export Citation:
Assignee:
SIEMENS AG (DE)
ILLGNER-FEHNS KLAUS (DE)
ILLGNER-FEHNS KLAUS (DE)
International Classes:
G06T9/00; H03M7/40; H03M7/46; H04N7/26; H04N7/30; (IPC1-7): H04N7/26; H03M7/40; H03M7/46; H04N7/30
Foreign References:
| EP1047271A2 | 2000-10-25 | |||
| EP0940994A2 | 1999-09-08 |
Other References:
ORDENTLICH E ET AL: "A low-complexity modeling approach for embedded coding of wavelet coefficients", DATA COMPRESSION CONFERENCE, 1998. DCC '98. PROCEEDINGS SNOWBIRD, UT, USA 30 MARCH-1 APRIL 1998, LOS ALAMITOS, CA, USA,IEEE COMPUT. SOC, US, 30 March 1998 (1998-03-30), pages 408 - 417, XP010276632, ISBN: 0-8186-8406-2
SHEUNG-YEUNG WANG ET AL: "Successive partition zero coder for embedded lossless wavelet-based image coding", IMAGE PROCESSING, 1999. ICIP 99. PROCEEDINGS. 1999 INTERNATIONAL CONFERENCE ON KOBE, JAPAN 24-28 OCT. 1999, PISCATAWAY, NJ, USA,IEEE, US, 24 October 1999 (1999-10-24), pages 40 - 43, XP010368655, ISBN: 0-7803-5467-2
SHEUNG-YEUNG WANG ET AL: "Successive partition zero coder for embedded lossless wavelet-based image coding", IMAGE PROCESSING, 1999. ICIP 99. PROCEEDINGS. 1999 INTERNATIONAL CONFERENCE ON KOBE, JAPAN 24-28 OCT. 1999, PISCATAWAY, NJ, USA,IEEE, US, 24 October 1999 (1999-10-24), pages 40 - 43, XP010368655, ISBN: 0-7803-5467-2
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