SE9703849D0 - Down-scaling of images - Google Patents
Down-scaling of imagesInfo
- Publication number
- SE9703849D0 SE9703849D0 SE9703849A SE9703849A SE9703849D0 SE 9703849 D0 SE9703849 D0 SE 9703849D0 SE 9703849 A SE9703849 A SE 9703849A SE 9703849 A SE9703849 A SE 9703849A SE 9703849 D0 SE9703849 D0 SE 9703849D0
- Authority
- SE
- Sweden
- Prior art keywords
- dcts
- original sequence
- dct
- scaling
- images
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T3/00—Geometric image transformations in the plane of the image
- G06T3/40—Scaling of whole images or parts thereof, e.g. expanding or contracting
- G06T3/4084—Scaling of whole images or parts thereof, e.g. expanding or contracting in the transform domain, e.g. fast Fourier transform [FFT] domain scaling
-
- 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
- H04N19/132—Sampling, masking or truncation of coding units, e.g. adaptive resampling, frame skipping, frame interpolation or high-frequency transform coefficient masking
-
- 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
- H04N19/164—Feedback from the receiver or from the transmission channel
-
- 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
- H04N19/169—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
- H04N19/187—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 scalable video layer
-
- 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
- H04N19/40—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using video transcoding, i.e. partial or full decoding of a coded input stream followed by re-encoding of the decoded output stream
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Compression Or Coding Systems Of Tv Signals (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
- Compression Of Band Width Or Redundancy In Fax (AREA)
- Solid-Fuel Combustion (AREA)
- Apparatus For Radiation Diagnosis (AREA)
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9703849A SE9703849L (sv) | 1997-03-14 | 1997-10-22 | Nedskalning av bilder |
CN98805114.1A CN1255988A (zh) | 1997-03-14 | 1998-03-12 | 图象的缩小 |
PCT/SE1998/000448 WO1998041929A2 (en) | 1997-03-14 | 1998-03-12 | Down scaling of images |
CA002283779A CA2283779A1 (en) | 1997-03-14 | 1998-03-12 | Down scaling of images |
EP98909938A EP0966713A2 (en) | 1997-03-14 | 1998-03-12 | Down scaling of images |
AU64296/98A AU752094B2 (en) | 1997-03-14 | 1998-03-12 | Down scaling of images |
JP54041898A JP2001517340A (ja) | 1997-03-14 | 1998-03-12 | 画像のダウンスケーリング |
US09/394,428 US7388913B1 (en) | 1997-03-14 | 1999-09-13 | Down scaling of images |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9700926A SE9700926D0 (sv) | 1997-03-14 | 1997-03-14 | Advanced DCT algorithms |
SE9703849A SE9703849L (sv) | 1997-03-14 | 1997-10-22 | Nedskalning av bilder |
Publications (2)
Publication Number | Publication Date |
---|---|
SE9703849D0 true SE9703849D0 (sv) | 1997-10-22 |
SE9703849L SE9703849L (sv) | 1998-09-15 |
Family
ID=26662932
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE9703849A SE9703849L (sv) | 1997-03-14 | 1997-10-22 | Nedskalning av bilder |
Country Status (8)
Country | Link |
---|---|
US (1) | US7388913B1 (sv) |
EP (1) | EP0966713A2 (sv) |
JP (1) | JP2001517340A (sv) |
CN (1) | CN1255988A (sv) |
AU (1) | AU752094B2 (sv) |
CA (1) | CA2283779A1 (sv) |
SE (1) | SE9703849L (sv) |
WO (1) | WO1998041929A2 (sv) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE9802286L (sv) | 1998-06-26 | 1999-12-27 | Ericsson Telefon Ab L M | Effektiv nedskalning av DCT-komprimerade bilder |
US7215708B2 (en) | 2001-05-22 | 2007-05-08 | Koninklijke Philips Electronics N.V. | Resolution downscaling of video images |
US7050656B2 (en) * | 2002-12-11 | 2006-05-23 | Seiko Epson Corporation | Image scaling in the compressed domain |
US7412100B2 (en) * | 2003-09-04 | 2008-08-12 | Qualcomm Incorporated | Apparatus and method for sub-sampling images in a transform domain |
US20070058713A1 (en) * | 2005-09-14 | 2007-03-15 | Microsoft Corporation | Arbitrary resolution change downsizing decoder |
US8447121B2 (en) * | 2005-09-14 | 2013-05-21 | Microsoft Corporation | Efficient integrated digital video transcoding |
TWI297118B (en) * | 2005-10-24 | 2008-05-21 | Avermedia Tech Inc | Method for executing data compression with surveillance host |
JP4577292B2 (ja) * | 2006-10-03 | 2010-11-10 | 日本ビクター株式会社 | 動画像符号化の動き情報変換装置及び動き情報変換プログラム |
EP2153405B1 (en) | 2007-06-04 | 2013-04-03 | Research In Motion Limited | Method and device for selecting optimal transform matrices for down-sampling dct image |
WO2008148206A1 (en) | 2007-06-04 | 2008-12-11 | Research In Motion Limited | Method and device for selecting transform matrices for down-sampling dct image using learning with forgetting algorithm |
US8094956B2 (en) | 2007-06-04 | 2012-01-10 | Research In Motion Limited | Method and device for down-sampling a DCT image in the DCT domain |
US8611423B2 (en) * | 2008-02-11 | 2013-12-17 | Csr Technology Inc. | Determination of optimal frame types in video encoding |
US8319820B2 (en) * | 2008-06-23 | 2012-11-27 | Radvision, Ltd. | Systems, methods, and media for providing cascaded multi-point video conferencing units |
US8558862B2 (en) * | 2009-09-28 | 2013-10-15 | Lifesize Communications, Inc. | Videoconferencing using a precoded bitstream |
US8754922B2 (en) * | 2009-09-28 | 2014-06-17 | Lifesize Communications, Inc. | Supporting multiple videoconferencing streams in a videoconference |
JP2012147205A (ja) * | 2011-01-11 | 2012-08-02 | Nippon Hoso Kyokai <Nhk> | 離散サイン変換回路、逆離散サイン変換回路、併用回路、符号化装置、復号装置及びプログラム |
MX2013011131A (es) | 2011-03-28 | 2013-10-30 | Dolby Lab Licensing Corp | Transformada con complejidad reducida para canal de efectos de baja frecuencia. |
US20150244896A1 (en) * | 2014-02-26 | 2015-08-27 | Vor Data Systems, Inc. | System and method for digital signal compression |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4293920A (en) * | 1979-09-04 | 1981-10-06 | Merola Pasquale A | Two-dimensional transform processor |
US5297236A (en) | 1989-01-27 | 1994-03-22 | Dolby Laboratories Licensing Corporation | Low computational-complexity digital filter bank for encoder, decoder, and encoder/decoder |
JPH02200082A (ja) * | 1989-01-30 | 1990-08-08 | Hitachi Ltd | 画像符号化装置 |
US5107345A (en) * | 1990-02-27 | 1992-04-21 | Qualcomm Incorporated | Adaptive block size image compression method and system |
US5293434A (en) * | 1991-04-10 | 1994-03-08 | International Business Machines Corporation | Technique for use in a transform coder for imparting robustness to compressed image data through use of global block transformations |
FR2675969B1 (fr) * | 1991-04-24 | 1994-02-11 | France Telecom | Procede et dispositif de codage-decodage d'un signal numerique. |
EP0587783B1 (en) * | 1991-06-04 | 1997-10-15 | Qualcomm, Inc. | Adaptive block size image compression system |
JPH06197334A (ja) * | 1992-07-03 | 1994-07-15 | Sony Corp | 画像信号符号化方法、画像信号復号化方法、画像信号符号化装置、画像信号復号化装置及び画像信号記録媒体 |
JPH06266747A (ja) * | 1993-03-12 | 1994-09-22 | Sharp Corp | Dct/逆dct演算装置 |
US5537440A (en) * | 1994-01-07 | 1996-07-16 | Motorola, Inc. | Efficient transcoding device and method |
US5541852A (en) * | 1994-04-14 | 1996-07-30 | Motorola, Inc. | Device, method and system for variable bit-rate packet video communications |
US5854858A (en) * | 1995-06-07 | 1998-12-29 | Girod; Bernd | Image signal coder operating at reduced spatial resolution |
US6192081B1 (en) * | 1995-10-26 | 2001-02-20 | Sarnoff Corporation | Apparatus and method for selecting a coding mode in a block-based coding system |
SE515535C2 (sv) * | 1996-10-25 | 2001-08-27 | Ericsson Telefon Ab L M | En transkoder |
US5870146A (en) * | 1997-01-21 | 1999-02-09 | Multilink, Incorporated | Device and method for digital video transcoding |
-
1997
- 1997-10-22 SE SE9703849A patent/SE9703849L/sv not_active Application Discontinuation
-
1998
- 1998-03-12 CN CN98805114.1A patent/CN1255988A/zh active Pending
- 1998-03-12 JP JP54041898A patent/JP2001517340A/ja active Pending
- 1998-03-12 CA CA002283779A patent/CA2283779A1/en not_active Abandoned
- 1998-03-12 AU AU64296/98A patent/AU752094B2/en not_active Ceased
- 1998-03-12 WO PCT/SE1998/000448 patent/WO1998041929A2/en active IP Right Grant
- 1998-03-12 EP EP98909938A patent/EP0966713A2/en not_active Withdrawn
-
1999
- 1999-09-13 US US09/394,428 patent/US7388913B1/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
WO1998041929A3 (en) | 1998-12-23 |
JP2001517340A (ja) | 2001-10-02 |
AU752094B2 (en) | 2002-09-05 |
CN1255988A (zh) | 2000-06-07 |
EP0966713A2 (en) | 1999-12-29 |
CA2283779A1 (en) | 1998-09-24 |
SE9703849L (sv) | 1998-09-15 |
AU6429698A (en) | 1998-10-12 |
US7388913B1 (en) | 2008-06-17 |
WO1998041929A2 (en) | 1998-09-24 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
NAV | Patent application has lapsed |