JP4648377B2 - 固定長ブロックの効率的な圧縮および圧縮解除 - Google Patents
固定長ブロックの効率的な圧縮および圧縮解除 Download PDFInfo
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- JP4648377B2 JP4648377B2 JP2007309551A JP2007309551A JP4648377B2 JP 4648377 B2 JP4648377 B2 JP 4648377B2 JP 2007309551 A JP2007309551 A JP 2007309551A JP 2007309551 A JP2007309551 A JP 2007309551A JP 4648377 B2 JP4648377 B2 JP 4648377B2
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- H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
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- 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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- Discrete Mathematics (AREA)
- Compression Or Coding Systems Of Tv Signals (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
- Television Systems (AREA)
- Color Television Systems (AREA)
Description
メモリ50に存在する圧縮データの再構成が必要な場合は、上記で説明した方法とおおむね逆の方法で圧縮解除が行われる。したがって、その関連装置についてはここで説明しない。ただし、上記のゼロ埋め込みは利用可能であり、そのように圧縮されたデータを圧縮解除器が受信する際に必要であると理解される。ビットの利用状況を追跡し、VLC10およびゼロ埋め込み器30に制御信号を送信する際に使用するアルゴリズムには、圧縮解除器が使用するものと逆向きのものもある。
20 ビットカウンタ
30 ゼロ埋め込み器
40 バッファ/Mux(マルチプレクサ)
50 メモリ
Claims (3)
- 受信した固定長圧縮ブロックデータに含まれる複数の可変ビット長圧縮データワードを圧縮解除する可変長データ圧縮解除システムであって、前記システムが、
データ圧縮の期間に前記圧縮データワードに使用されたビットを示す情報を格納する記憶手段と、
圧縮解除されるべき前記圧縮データワードを受信する入力装置と、
前記入力装置と連結され、いくらかの埋め込みビットを含む前記圧縮データワードに含まれているビット数をカウントし、カウントした前記ビット数に応じて当該圧縮データワードの埋め込みビット数を判定するビットカウンタであって、該圧縮データワードのビット数についての情報は前記記憶手段からアクセスされる、ビットカウンタと、
前記ビットカウンタが判定した前記埋め込みビット数に応じて埋め込まれた圧縮データワードから1つまたは複数の埋め込みビットを取り除く埋め込み解除器と、
前記ビットカウンタから転送された埋め込みビットが初めからない前記圧縮データワードまたは前記埋め込み解除器から転送された前記埋め込みビットが取り除かれた圧縮データワードを受信し、それら圧縮データワードを圧縮解除する可変長データ圧縮解除器と
を含むことを特徴とする可変長圧縮解除システム。 - 前記可変長データ圧縮解除器が量子化解除器であることを特徴とする請求項1に記載のシステム。
- 受信した固定長圧縮データブロックに含まれる複数の可変ビット長圧縮データワードを圧縮解除する方法であって、前記圧縮データワードが埋め込まれたビットを含み、
前記圧縮データワードの合計ビット数を計測するステップと、
前記データワードを圧縮するのに使用されたビット数を示すデータをメモリ手段から取り出すステップと、
前記計測した合計ビット数のいずれが埋め込みビットであるかを判断するステップと、
埋め込みがある場合には、前記圧縮データワードから前記判断した埋め込みビットを取り除くステップと、
前記埋め込みビットが取り除かれた前記圧縮データワードを圧縮解除するステップと
を含むことを特徴とするデータ圧縮解除方法。
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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EP96402785 | 1996-12-18 |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
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JP52767098A Division JP4627812B2 (ja) | 1996-12-18 | 1997-09-30 | 固定長ブロックの効率的な圧縮および圧縮解除 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2008113458A JP2008113458A (ja) | 2008-05-15 |
JP4648377B2 true JP4648377B2 (ja) | 2011-03-09 |
Family
ID=8225352
Family Applications (12)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP52767098A Expired - Lifetime JP4627812B2 (ja) | 1996-12-18 | 1997-09-30 | 固定長ブロックの効率的な圧縮および圧縮解除 |
JP52767198A Expired - Fee Related JP3907705B2 (ja) | 1996-12-18 | 1997-09-30 | 多重フォーマットビデオ信号処理装置 |
JP52784998A Pending JP2001506454A (ja) | 1996-12-18 | 1997-12-15 | Mpeg互換シグナル・プロセッサのためのデータ圧縮解除システム |
JP52784398A Pending JP2001506452A (ja) | 1996-12-18 | 1997-12-15 | インタリーブ式データ処理を用いたビデオデコーダ |
JP52779598A Pending JP2001506446A (ja) | 1996-12-18 | 1997-12-15 | Mpeg互換ビデオ・デコーダにおけるデータ削減ネットワーク |
JP52785098A Expired - Lifetime JP3907706B2 (ja) | 1996-12-18 | 1997-12-15 | 多重フォーマットビデオ信号処理装置のためのメモリ構造 |
JP52787098A Pending JP2001506834A (ja) | 1996-12-18 | 1997-12-15 | ソース・データ中断が存在するときにデータストリームの連続性を維持するシステム |
JP52784898A Pending JP2001506453A (ja) | 1996-12-18 | 1997-12-15 | Mpeg互換デコーダ用のmpeg圧縮システム |
JP52788798A Pending JP2001506457A (ja) | 1996-12-18 | 1997-12-15 | Mpeg互換デコーダにおける選択的圧縮ネットワーク |
JP52785198A Expired - Lifetime JP4588122B2 (ja) | 1996-12-18 | 1997-12-15 | Mpegデコーダにおけるインタリーブされたデータストリームの並列復号 |
JP2007309551A Expired - Lifetime JP4648377B2 (ja) | 1996-12-18 | 2007-11-29 | 固定長ブロックの効率的な圧縮および圧縮解除 |
JP2008203619A Pending JP2008271610A (ja) | 1996-12-18 | 2008-08-06 | Mpeg互換ディジタル信号処理システムおよびmpeg符号化データのデータ・スリームを処理する方法 |
Family Applications Before (10)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP52767098A Expired - Lifetime JP4627812B2 (ja) | 1996-12-18 | 1997-09-30 | 固定長ブロックの効率的な圧縮および圧縮解除 |
JP52767198A Expired - Fee Related JP3907705B2 (ja) | 1996-12-18 | 1997-09-30 | 多重フォーマットビデオ信号処理装置 |
JP52784998A Pending JP2001506454A (ja) | 1996-12-18 | 1997-12-15 | Mpeg互換シグナル・プロセッサのためのデータ圧縮解除システム |
JP52784398A Pending JP2001506452A (ja) | 1996-12-18 | 1997-12-15 | インタリーブ式データ処理を用いたビデオデコーダ |
JP52779598A Pending JP2001506446A (ja) | 1996-12-18 | 1997-12-15 | Mpeg互換ビデオ・デコーダにおけるデータ削減ネットワーク |
JP52785098A Expired - Lifetime JP3907706B2 (ja) | 1996-12-18 | 1997-12-15 | 多重フォーマットビデオ信号処理装置のためのメモリ構造 |
JP52787098A Pending JP2001506834A (ja) | 1996-12-18 | 1997-12-15 | ソース・データ中断が存在するときにデータストリームの連続性を維持するシステム |
JP52784898A Pending JP2001506453A (ja) | 1996-12-18 | 1997-12-15 | Mpeg互換デコーダ用のmpeg圧縮システム |
JP52788798A Pending JP2001506457A (ja) | 1996-12-18 | 1997-12-15 | Mpeg互換デコーダにおける選択的圧縮ネットワーク |
JP52785198A Expired - Lifetime JP4588122B2 (ja) | 1996-12-18 | 1997-12-15 | Mpegデコーダにおけるインタリーブされたデータストリームの並列復号 |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2008203619A Pending JP2008271610A (ja) | 1996-12-18 | 2008-08-06 | Mpeg互換ディジタル信号処理システムおよびmpeg符号化データのデータ・スリームを処理する方法 |
Country Status (13)
Country | Link |
---|---|
EP (10) | EP0945022B1 (ja) |
JP (12) | JP4627812B2 (ja) |
KR (10) | KR100517993B1 (ja) |
CN (15) | CN1250010C (ja) |
AU (10) | AU4507097A (ja) |
BR (4) | BR9713712A (ja) |
DE (8) | DE69719365T2 (ja) |
HK (5) | HK1026100A1 (ja) |
MY (7) | MY119023A (ja) |
RU (4) | RU2217879C2 (ja) |
TR (1) | TR199901359T2 (ja) |
TW (3) | TW369774B (ja) |
WO (10) | WO1998027720A1 (ja) |
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