CA2012747A1 - Dispositif pour reduire la redondance dans les blocs de donnees video numeriques codees par transformation cosinus discrete - Google Patents
Dispositif pour reduire la redondance dans les blocs de donnees video numeriques codees par transformation cosinus discreteInfo
- Publication number
- CA2012747A1 CA2012747A1 CA2012747A CA2012747A CA2012747A1 CA 2012747 A1 CA2012747 A1 CA 2012747A1 CA 2012747 A CA2012747 A CA 2012747A CA 2012747 A CA2012747 A CA 2012747A CA 2012747 A1 CA2012747 A1 CA 2012747A1
- Authority
- CA
- Canada
- Prior art keywords
- level
- zero
- signal
- levels
- preset
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000005540 biological transmission Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 238000013139 quantization Methods 0.000 abstract 1
- 230000007704 transition Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/169—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
- H04N19/18—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being a set of transform coefficients
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
- H04N19/124—Quantisation
- H04N19/126—Details of normalisation or weighting functions, e.g. normalisation matrices or variable uniform quantisers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
- H04N19/146—Data rate or code amount at the encoder output
- H04N19/152—Data rate or code amount at the encoder output by measuring the fullness of the transmission buffer
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/60—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/60—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding
- H04N19/61—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding in combination with predictive coding
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
- H04N19/146—Data rate or code amount at the encoder output
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Compression Or Coding Systems Of Tv Signals (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
- Analogue/Digital Conversion (AREA)
- Color Television Systems (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP89830311.0 | 1989-07-04 | ||
EP89830311A EP0406508B1 (fr) | 1989-07-04 | 1989-07-04 | Dispositif pour réduire la redondance dans des blocs de données vidéo numériques dans le codage DCT |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2012747A1 true CA2012747A1 (fr) | 1991-01-04 |
CA2012747C CA2012747C (fr) | 1995-01-10 |
Family
ID=8203232
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002012747A Expired - Fee Related CA2012747C (fr) | 1989-07-04 | 1990-03-21 | Dispositif pour reduire la redondance dans les blocs de donnees video numeriques codees par transformation cosinus discrete |
Country Status (5)
Country | Link |
---|---|
US (1) | US5006930A (fr) |
EP (1) | EP0406508B1 (fr) |
JP (1) | JP2872339B2 (fr) |
CA (1) | CA2012747C (fr) |
DE (1) | DE68909592T2 (fr) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5367385A (en) * | 1992-05-07 | 1994-11-22 | Picturetel Corporation | Method and apparatus for processing block coded image data to reduce boundary artifacts between adjacent image blocks |
US5648774A (en) * | 1995-05-08 | 1997-07-15 | Industrial Technology Research Institute | Variable length coding with three-field codes |
JP3603000B2 (ja) | 2000-02-01 | 2004-12-15 | カネボウ株式会社 | ハフマン符号化装置、ハフマン符号化方法およびハフマン符号化処理プログラムを記録した記録媒体 |
US7212681B1 (en) | 2003-01-15 | 2007-05-01 | Cisco Technology, Inc. | Extension of two-dimensional variable length coding for image compression |
US7194137B2 (en) * | 2003-05-16 | 2007-03-20 | Cisco Technology, Inc. | Variable length coding method and apparatus for video compression |
US7454076B2 (en) * | 2004-06-15 | 2008-11-18 | Cisco Technology, Inc. | Hybrid variable length coding method for low bit rate video coding |
US7471841B2 (en) * | 2004-06-15 | 2008-12-30 | Cisco Technology, Inc. | Adaptive breakpoint for hybrid variable length coding |
US7471840B2 (en) * | 2004-08-18 | 2008-12-30 | Cisco Technology, Inc. | Two-dimensional variable length coding of runs of zero and non-zero transform coefficients for image compression |
US7499595B2 (en) * | 2004-08-18 | 2009-03-03 | Cisco Technology, Inc. | Joint amplitude and position coding for photographic image and video coding |
US7492956B2 (en) * | 2004-08-18 | 2009-02-17 | Cisco Technology, Inc. | Video coding using multi-dimensional amplitude coding and 2-D non-zero/zero cluster position coding |
US7454073B2 (en) * | 2004-06-15 | 2008-11-18 | Cisco Technology, Inc. | Video compression using multiple variable length coding processes for multiple classes of transform coefficient blocks |
US7499596B2 (en) * | 2004-08-18 | 2009-03-03 | Cisco Technology, Inc. | Amplitude coding for clustered transform coefficients |
US7620258B2 (en) * | 2004-08-18 | 2009-11-17 | Cisco Technology, Inc. | Extended amplitude coding for clustered transform coefficients |
US7680349B2 (en) * | 2004-08-18 | 2010-03-16 | Cisco Technology, Inc. | Variable length coding for clustered transform coefficients in video compression |
US7242328B1 (en) * | 2006-02-03 | 2007-07-10 | Cisco Technology, Inc. | Variable length coding for sparse coefficients |
PE20090696A1 (es) * | 2007-04-20 | 2009-06-20 | Bristol Myers Squibb Co | Formas cristalinas de saxagliptina y procesos para preparar las mismas |
US10333696B2 (en) | 2015-01-12 | 2019-06-25 | X-Prime, Inc. | Systems and methods for implementing an efficient, scalable homomorphic transformation of encrypted data with minimal data expansion and improved processing efficiency |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2706080C2 (de) * | 1977-02-12 | 1986-10-23 | Philips Patentverwaltung Gmbh, 2000 Hamburg | Verfahren zur adaptiven Quantisierung von Transformationskoeffizienten eines Bildes und Anordnung zum Durchführen des Verfahrens |
US4541012A (en) * | 1982-01-04 | 1985-09-10 | Compression Labs, Inc. | Video bandwidth reduction system employing interframe block differencing and transform domain coding |
JPS62214792A (ja) * | 1986-03-14 | 1987-09-21 | Fujitsu Ltd | 差分符号化装置 |
JPH0783348B2 (ja) * | 1986-05-02 | 1995-09-06 | 株式会社日立製作所 | デジタル信号の復号装置 |
JPH0748859B2 (ja) * | 1986-08-11 | 1995-05-24 | 国際電信電話株式会社 | テレビジヨン信号の予測符号化方式 |
CA1296430C (fr) * | 1986-11-10 | 1992-02-25 | Masahide Kaneko | Systeme de codage permettant, par quantification, un traitement anterieur ou posterieur a haute efficacite |
US4875095A (en) * | 1987-06-30 | 1989-10-17 | Kokusai Denshin Denwa Kabushiki Kaisha | Noise-shaping predictive coding system |
-
1989
- 1989-07-04 EP EP89830311A patent/EP0406508B1/fr not_active Expired - Lifetime
- 1989-07-04 DE DE89830311T patent/DE68909592T2/de not_active Expired - Fee Related
-
1990
- 1990-03-06 US US07/489,485 patent/US5006930A/en not_active Expired - Fee Related
- 1990-03-21 CA CA002012747A patent/CA2012747C/fr not_active Expired - Fee Related
- 1990-04-03 JP JP2089019A patent/JP2872339B2/ja not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE68909592T2 (de) | 1994-05-11 |
JPH0355987A (ja) | 1991-03-11 |
EP0406508B1 (fr) | 1993-09-29 |
DE68909592D1 (de) | 1993-11-04 |
US5006930A (en) | 1991-04-09 |
JP2872339B2 (ja) | 1999-03-17 |
EP0406508A1 (fr) | 1991-01-09 |
CA2012747C (fr) | 1995-01-10 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed |