JP4410245B2 - ビデオをトランスコーディングする方法 - Google Patents
ビデオをトランスコーディングする方法 Download PDFInfo
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- JP4410245B2 JP4410245B2 JP2006502674A JP2006502674A JP4410245B2 JP 4410245 B2 JP4410245 B2 JP 4410245B2 JP 2006502674 A JP2006502674 A JP 2006502674A JP 2006502674 A JP2006502674 A JP 2006502674A JP 4410245 B2 JP4410245 B2 JP 4410245B2
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- 238000000034 method Methods 0.000 claims description 36
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- 238000005516 engineering process Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002123 temporal effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
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- 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
- H04N19/30—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using hierarchical techniques, e.g. scalability
- H04N19/34—Scalability techniques involving progressive bit-plane based encoding of the enhancement layer, e.g. fine granular scalability [FGS]
-
- 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
- H04N19/115—Selection of the code volume for a coding unit prior to coding
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- 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
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- 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
- H04N19/147—Data rate or code amount at the encoder output according to rate distortion criteria
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- 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
- H04N19/154—Measured or subjectively estimated visual quality after decoding, e.g. measurement of distortion
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- 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
- H04N19/17—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 an image region, e.g. an object
- H04N19/176—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 an image region, e.g. an object the region being a block, e.g. a macroblock
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- 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
- H04N19/184—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 bits, e.g. of the compressed video stream
-
- 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
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/189—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the adaptation method, adaptation tool or adaptation type used for the adaptive coding
- H04N19/19—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the adaptation method, adaptation tool or adaptation type used for the adaptive coding using optimisation based on Lagrange multipliers
-
- 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
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Compression Or Coding Systems Of Tv Signals (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
Description
上記のビットレートの低減により、DCT領域における最も高いAC周波数に対応する「1」のビットを消去する。しかしながら、このやり方は、レート歪(R−D)の観点で見ると最適ではない。例えば、拡張階層ブロックにおいて符号化される2つの係数「8」および「15」はバイナリ形式では「1000」および「1111」で表される。1番目の拡張階層の最上位ビットプレーン(MSB)は2つの「1」を含む。
本発明の有効性を検証するために、共通中間フォーマット(CIF)を用いて標準的な「Akiyo」ビデオシーケンスを符号化した。基本階層は、IフレームとPフレームの両方を量子化パラメータQ=31で符号化する。このシーケンス中にはBフレームはない。拡張階層に関しては、拡張階層に利用可能な全帯域幅は576kb/sである。
Claims (6)
- ビットプレーン符号化を用いて、ビデオを基本階層と、少なくとも1つの拡張階層とに階層的に符号化することと、
利用可能なビットレートで送信された結果として、切り捨てられる拡張階層に相当する最後の拡張階層が存在する場合には、前記ピットプレーン符号化された前記最後の拡張階層をDCT係数まで復号化することと、
復号化された前記DCT係数をピットプレーン符号化する際のビット数を前記利用可能なビットレートに合わせて低減することと、
前記低減したビット数を用いて前記DCT係数を再びビットプレーン符号化することで前記最後の拡張階層を再符号化することと
を含むビデオをトランスコーディングする方法。 - 前記低減は、前記利用可能なビットレートを満たすまで各ブロックの高周波数のDCT係数を拡張させる「1」の値を消去する請求項1に記載の方法。
- どの「1」のビットを消去するかを判定するためにコスト関数を評価することをさらに含む請求項1に記載の方法。
- 前記コスト関数は、J(λ)=D(Ri)+λRiであり、ここで、Riは、現在のブロックを符号化するために用いられるビット数であり、D(Ri)は、ビットレートRiに対応する歪であり、λは、前記基本階層のブロックの量子化パラメータに従って特定される実験的パラメータである請求項4に記載の方法。
- 前記コスト関数を評価することは、トレリス探索を用いて処理されることをさらに含む請求項4に記載の方法。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/371,087 US20040179606A1 (en) | 2003-02-21 | 2003-02-21 | Method for transcoding fine-granular-scalability enhancement layer of video to minimized spatial variations |
PCT/JP2004/001929 WO2004075560A1 (en) | 2003-02-21 | 2004-02-19 | Method for transcoding a fine granular scalable encoded video |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2006518572A JP2006518572A (ja) | 2006-08-10 |
JP4410245B2 true JP4410245B2 (ja) | 2010-02-03 |
Family
ID=32907677
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2006502674A Expired - Fee Related JP4410245B2 (ja) | 2003-02-21 | 2004-02-19 | ビデオをトランスコーディングする方法 |
Country Status (4)
Country | Link |
---|---|
US (1) | US20040179606A1 (ja) |
JP (1) | JP4410245B2 (ja) |
CN (1) | CN100352283C (ja) |
WO (1) | WO2004075560A1 (ja) |
Families Citing this family (24)
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EP1665799A4 (en) * | 2003-08-26 | 2010-03-31 | Samsung Electronics Co Ltd | METHOD AND DEVICE FOR SCALABLE VIDEO CODING THROUGH THE USE OF A PRE-DECODER |
JP2007509525A (ja) * | 2003-10-20 | 2007-04-12 | サムスン エレクトロニクス カンパニー リミテッド | 視覚的画質を均一にするビットレートコントロール方法及び装置 |
US20050088986A1 (en) * | 2003-10-27 | 2005-04-28 | Feng-Wen Sun | Systems and methods for distributing data |
EP1766783B1 (en) | 2004-07-14 | 2011-11-02 | Slipstream Data Inc. | Method, system and computer program product for optimization of data compression |
US7570827B2 (en) | 2004-07-14 | 2009-08-04 | Slipstream Data Inc. | Method, system and computer program product for optimization of data compression with cost function |
JP4624347B2 (ja) * | 2004-10-06 | 2011-02-02 | 日本電信電話株式会社 | スケーラブル符号化方法および装置,スケーラブル復号方法および装置,それらのプログラムおよびそれらプログラムを記録した記録媒体 |
US20060193379A1 (en) * | 2005-02-25 | 2006-08-31 | Nokia Corporation | System and method for achieving inter-layer video quality scalability |
WO2006129184A1 (en) * | 2005-06-03 | 2006-12-07 | Nokia Corporation | Residual prediction mode in scalable video coding |
US9025673B2 (en) | 2006-04-05 | 2015-05-05 | Qualcomm Incorporated | Temporal quality metric for video coding |
FR2903556B1 (fr) * | 2006-07-04 | 2008-10-03 | Canon Kk | Procedes et des dispositifs de codage et de decodage d'images, un systeme de telecommunications comportant de tels dispositifs et des programmes d'ordinateur mettant en oeuvre de tels procedes |
CN101507281B (zh) * | 2006-07-12 | 2013-06-05 | 诺基亚公司 | 媒体文件中的兴趣区域可缩放性信息的信号发送 |
CN101491097B (zh) * | 2006-07-13 | 2011-12-14 | 高通股份有限公司 | 使用经循环对准的片段的具有细粒度可缩放性的视频编码 |
CN101523919B (zh) * | 2006-10-12 | 2011-09-14 | 高通股份有限公司 | 基于用于精细化系数译码的视频区块类型的可变长度译码表选择 |
US9319700B2 (en) | 2006-10-12 | 2016-04-19 | Qualcomm Incorporated | Refinement coefficient coding based on history of corresponding transform coefficient values |
US8325819B2 (en) * | 2006-10-12 | 2012-12-04 | Qualcomm Incorporated | Variable length coding table selection based on video block type for refinement coefficient coding |
US8565314B2 (en) * | 2006-10-12 | 2013-10-22 | Qualcomm Incorporated | Variable length coding table selection based on block type statistics for refinement coefficient coding |
US8599926B2 (en) * | 2006-10-12 | 2013-12-03 | Qualcomm Incorporated | Combined run-length coding of refinement and significant coefficients in scalable video coding enhancement layers |
US8243789B2 (en) * | 2007-01-25 | 2012-08-14 | Sharp Laboratories Of America, Inc. | Methods and systems for rate-adaptive transmission of video |
AU2007201403A1 (en) * | 2007-03-30 | 2008-10-16 | Canon Kabushiki Kaisha | Improvement for Spatial Wyner Ziv coding |
JP5359302B2 (ja) * | 2008-03-18 | 2013-12-04 | ソニー株式会社 | 情報処理装置および方法、並びにプログラム |
KR101313952B1 (ko) * | 2008-06-23 | 2013-10-01 | 픽스센스 인코포레이티드 | 부호화된 데이터의 압축 이득을 위한 피압축 도메인 시스템 및 방법 |
GB2496862B (en) * | 2011-11-22 | 2016-06-01 | Canon Kk | Communication of data blocks over a communication system |
KR102495915B1 (ko) * | 2018-04-30 | 2023-02-03 | 삼성전자 주식회사 | 스토리지 장치 및 상기 스토리지 장치를 포함하는 서버 |
CN116962712B (zh) * | 2023-09-20 | 2023-12-12 | 成都索贝数码科技股份有限公司 | 一种视频图像分层编码的增强层改进编码方法 |
Family Cites Families (7)
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US6292512B1 (en) * | 1998-07-06 | 2001-09-18 | U.S. Philips Corporation | Scalable video coding system |
US6639943B1 (en) * | 1999-11-23 | 2003-10-28 | Koninklijke Philips Electronics N.V. | Hybrid temporal-SNR fine granular scalability video coding |
WO2001089167A2 (en) * | 2000-05-15 | 2001-11-22 | Virginia Tech Intellectual Properties, Inc. | Method and system for overloaded array processing |
US6771703B1 (en) * | 2000-06-30 | 2004-08-03 | Emc Corporation | Efficient scaling of nonscalable MPEG-2 Video |
US7042944B2 (en) * | 2000-09-22 | 2006-05-09 | Koninklijke Philips Electronics N.V. | Single-loop motion-compensation fine granular scalability |
US7391807B2 (en) * | 2002-04-24 | 2008-06-24 | Mitsubishi Electric Research Laboratories, Inc. | Video transcoding of scalable multi-layer videos to single layer video |
US7167560B2 (en) * | 2002-08-08 | 2007-01-23 | Matsushita Electric Industrial Co., Ltd. | Partial encryption of stream-formatted media |
-
2003
- 2003-02-21 US US10/371,087 patent/US20040179606A1/en not_active Abandoned
-
2004
- 2004-02-19 CN CNB2004800000294A patent/CN100352283C/zh not_active Expired - Fee Related
- 2004-02-19 JP JP2006502674A patent/JP4410245B2/ja not_active Expired - Fee Related
- 2004-02-19 WO PCT/JP2004/001929 patent/WO2004075560A1/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
WO2004075560A1 (en) | 2004-09-02 |
JP2006518572A (ja) | 2006-08-10 |
CN1698383A (zh) | 2005-11-16 |
US20040179606A1 (en) | 2004-09-16 |
CN100352283C (zh) | 2007-11-28 |
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