JP3659353B2 - ビデオ画像符号化方法 - Google Patents
ビデオ画像符号化方法 Download PDFInfo
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- JP3659353B2 JP3659353B2 JP2003374710A JP2003374710A JP3659353B2 JP 3659353 B2 JP3659353 B2 JP 3659353B2 JP 2003374710 A JP2003374710 A JP 2003374710A JP 2003374710 A JP2003374710 A JP 2003374710A JP 3659353 B2 JP3659353 B2 JP 3659353B2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/14—Picture signal circuitry for video frequency region
- H04N5/144—Movement detection
- H04N5/145—Movement estimation
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/20—Analysis of motion
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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
- H04N19/124—Quantisation
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- H—ELECTRICITY
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- 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
- H04N19/136—Incoming video signal characteristics or properties
- H04N19/14—Coding unit complexity, e.g. amount of activity or edge presence estimation
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- 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
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- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
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- 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
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- H—ELECTRICITY
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- 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
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- 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
- H04N19/186—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 colour or a chrominance component
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- H—ELECTRICITY
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- 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
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- H04N19/503—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving temporal prediction
- H04N19/51—Motion estimation or motion compensation
- H04N19/53—Multi-resolution motion estimation; Hierarchical motion estimation
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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
- H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
- H04N19/503—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving temporal prediction
- H04N19/51—Motion estimation or motion compensation
- H04N19/537—Motion estimation other than block-based
- H04N19/54—Motion estimation other than block-based using feature points or meshes
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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
- H04N19/60—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
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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
- H04N19/60—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding
- H04N19/63—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding using sub-band based transform, e.g. wavelets
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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
- H04N19/90—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using coding techniques not provided for in groups H04N19/10-H04N19/85, e.g. fractals
- H04N19/96—Tree coding, e.g. quad-tree 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
- H04N19/134—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
Description
本発明は、ビデオ画像符号化方法に関する。より詳細には、本発明はブロックサイズの可変度と位置に関する制限をし、画像の分割構造を伝送する際のビットを削減するための方法に関する。
反対に、子ノードの符号化による歪みの和がその親ノードの符号化による歪みより小さい場合、そのノードは“分割(split)”され、親ノードに対するラグランジェコストはその子ノードのラグランジェのコストの和として設定される。これらのステップは最適な4分割ツリー構造が得られるまで全てのレベルを通し全てのノードに対し反復される。
さらに、この方法は、完全に開花したツリーから開始し、木の上から下への“トップダウン”比較(探索パターン)に付随する極小を避けられるので最適な解が得られる。
LLサブバンドはさらに2回ずつサブサンプリングされて、HH,HL,LH及びLLのサブバンドのセット(組)を生成する。このようなサンプリングを繰り返し、図10に示すような列(アレイ)を3度のサブサンプリングにより生成する。
好ましくは、6回のサブサンプリングを実施する。親子関係は親ノードのサブバンドから子ノードのサブバンドを指す矢印で示される。最低周波数サブバンドは左上のLL3であり、最高周波数サブバンドは右下のHH1である。この例の場合、全ての子ノードは1つの親を持つ。
しかしながら、ウェーブレットベースの方法は、ブロック間の独立性を許さない。従って、各個別ブロックの正確なコスト計算を行うのは非常に難しい。
本発明の多くの変更、修正、変種及び他の使用と応用は、実施態様を開示しているこの明細書を読み添付の図面を参照すれば、当業者には明らかになるであろう。
尚、このような改変,変更、変形及び他の使用と応用はすべて、本発明の精神と範囲から逸脱するものではなく、本発明により包含されるとみなされる。
Claims (3)
- ビデオ画像を可変ブロックサイズSのブロックに分割するブロック分割ステップと、前記ブロックに対応した動きベクトルによって動き補償処理を行うステップと、動き補償処理の予測誤差を直交変換する直交変換ステップと、直交変換の結果を量子化スケールQで量子化する量子化ステップとを備え、前記ブロック分割ステップは、可変ブロックサイズSと量子化スケールQとの関数であるラグランジュコストL(S,Q)を、総量子化歪みD(S,Q)、総ビット数R(S,Q)およびラグランジュ乗数λによって、D(S,Q)+λR(S,Q)と表わし、前記ラグランジェコストL(S,Q)を使用して、総ビット数R(S,Q)が一定の条件の下に、総量子化歪みD(S,Q)を最小化する可変ブロックサイズSと量子化スケールQを求めてブロック分割を行うことを特徴とするビデオ画像符号化方法。
- 前記ブロックサイズとして、第1のサイズの正方ブロックと、第1のサイズの正方ブロックを4分割した第2のサイズの正方ブロックと、第2のサイズの正方ブロックを4分割した第3のサイズの正方ブロックを含むことを特徴とする請求項1記載のビデオ画像符号化方法。
- 前記直交変換の結果である変換係数を量子化するための量子化テーブルとして、輝度量子化テーブル及び色差量子化テーブルを備えたことを特徴とする請求項1記載のビデオ画像符号化方法。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US701795P | 1995-10-25 | 1995-10-25 | |
US2051496P | 1996-06-28 | 1996-06-28 |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP09518195A Division JP2000511366A (ja) | 1995-10-25 | 1996-10-23 | 4分割ツリーベースの可変ブロックサイズ動き推定装置および方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2004112825A JP2004112825A (ja) | 2004-04-08 |
JP3659353B2 true JP3659353B2 (ja) | 2005-06-15 |
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ID=26676361
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP09518195A Ceased JP2000511366A (ja) | 1995-10-25 | 1996-10-23 | 4分割ツリーベースの可変ブロックサイズ動き推定装置および方法 |
JP2003374710A Expired - Lifetime JP3659353B2 (ja) | 1995-10-25 | 2003-11-04 | ビデオ画像符号化方法 |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP09518195A Ceased JP2000511366A (ja) | 1995-10-25 | 1996-10-23 | 4分割ツリーベースの可変ブロックサイズ動き推定装置および方法 |
Country Status (3)
Country | Link |
---|---|
US (1) | US6084908A (ja) |
JP (2) | JP2000511366A (ja) |
WO (1) | WO1997017797A2 (ja) |
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