JP4682759B2 - 再生装置、再生方法および再生プログラム - Google Patents
再生装置、再生方法および再生プログラム Download PDFInfo
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- H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Databases & Information Systems (AREA)
- Television Signal Processing For Recording (AREA)
- Compression Or Coding Systems Of Tv Signals (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
- Management Or Editing Of Information On Record Carriers (AREA)
Description
藤原 洋、「ポイント図解式・最新MPEG教科書」、初版、株式会社アスキー、1994年8月1日、p.106
00:Iピクチャ
10:Pピクチャ
01:前方(未来)のフレームが参照されて復元されるBピクチャ。これは、例えばオープンGOPの場合の、ロングGOPビデオファイル先頭のBピクチャ、または、クローズドGOPの場合の各GOPの先頭のBピクチャである。
11:前方および後方のフレームが参照されて復元されるBピクチャ。
(1)目標再生フレームおよび表示順で目標再生フレームに隣接するフレーム以外のBピクチャによるフレームは、破棄する。
(2)上述の(1)のルールに従い破棄するBピクチャによるフレームが存在しなかった場合、バッファメモリ上に存在する、下記(2a)または(2b)の条件を満たすIまたはPピクチャによるフレームを破棄する。
(2a)順方向への目標再生フレーム移行の場合、目標再生フレームが存在するGOPから逆方向に最も離れたGOPにおいて、そのGOPに属する最後尾のIまたはPピクチャ。
(2b)逆方向への目標再生フレーム移行の場合、目標再生フレームが存在するGOPから順方向に最も離れたGOPにおいて、そのGOPに属する最後尾のIまたはPピクチャ。
10 光ディスク
11 ディスクドライブ
12 キャッシュメモリ
13 デコーダ
13A フレームメモリ(フレームバッファ)
14 CPU
22 MPEGデコーダ
23 出力データ制御部
33 予測復元部
35 ROM
36 RAM
Claims (7)
- 予測符号化によるフレーム間圧縮を用いて圧縮符号化されランダムアクセス可能な記録媒体に記録されたビデオデータを、逆方向の1倍速再生から順方向の1倍速再生まで可変速に再生するようにした再生装置であって、
少なくとも、現在の目標再生フレームと、上記現在の目標フレームに対して表示順で前後に隣接するそれぞれのフレームとを格納するフレームバッファと、
上記それぞれのフレームのいずれかが新たな目標再生フレームとされたときに、該新たな目標再生フレームに対する上記フレームバッファの目標パターンを作成する目標パターン作成部と、
上記現在の目標再生フレームが格納されたフレームバッファの状態と上記目標パターンとを比較する比較部と、
上記比較部による比較結果に基づき、新たにデコードが必要な1フレームを抽出すると共に上記現在のフレームバッファの状態で不要になる1フレームを抽出するフレームバッファ制御部とを有する再生装置。 - 上記新たにデコードが必要な1フレームは、上記新たな目標再生フレームに対して表示順で前後に隣接するいずれかのフレームとされ、
上記フレームバッファ制御部は、該フレームが上記フレームバッファに既に格納されている場合は、上記フレームバッファに格納されているフレームの内、表示順で最も新しい1フレームまたは表示順で最も古い1フレームを、上記不要になる1フレームとする請求項1に記載の再生装置。 - 上記フレームバッファ制御部は、所定のルールにより上記不要になる1フレームを決定し、
上記所定のルールは、上記新たな目標再生フレームに対して表示順で前後に隣接せず、時間的に前および/または後の他のフレームを基準としてデコードされる1フレームを上記不要になる1フレームとして決定する請求項1に記載の再生装置。 - 上記フレームバッファ制御部により抽出された上記新たにデコードが必要なフレームの入力を開始し、該入力が開始されたフレームをデコードして上記フレームバッファ上の上記不要になるフレームの領域に対して格納するように制御するデコード制御部をさらに有する請求項1乃至3のいずれか1項に記載の再生装置。
- 上記目標パターンは、
予め作成され記憶媒体に記憶されている請求項1乃至4のいずれか1項に記載の再生装置。 - 予測符号化によるフレーム間圧縮を用いて圧縮符号化されランダムアクセス可能な記録媒体に記録されたビデオデータを、逆方向の1倍速再生から順方向の1倍速再生まで可変速に再生するようにした再生方法であって、
少なくとも、現在の目標再生フレームと、上記現在の目標フレームに対して表示順で前後に隣接するそれぞれのフレームとがフレームバッファに格納され、
上記それぞれのフレームのいずれかが新たな目標再生フレームとされたときに、該新たな目標再生フレームに対する上記フレームバッファの目標パターンを作成する目標パターン作成ステップと、
上記現在の目標再生フレームが格納されたフレームバッファの状態と上記目標パターンとを比較する比較ステップと、
上記比較ステップにおける比較結果に基づき、新たにデコードが必要な1フレームを抽出すると共に上記現在のフレームバッファの状態で不要になる1フレームを抽出するフレームバッファ制御ステップとを有する再生方法。 - 予測符号化によるフレーム間圧縮を用いて圧縮符号化されランダムアクセス可能な記録媒体に記録されたビデオデータを、逆方向の1倍速再生から順方向の1倍速再生まで可変速に再生するようにした再生方法をコンピュータ装置に実行させるための再生プログラムであって、
少なくとも、現在の目標再生フレームと、上記現在の目標フレームに対して表示順で前後に隣接するそれぞれのフレームとがフレームバッファに格納され、
上記それぞれのフレームのいずれかが新たな目標再生フレームとされたときに、該新たな目標再生フレームに対する上記フレームバッファの目標パターンを作成する目標パターン作成ステップと、
上記現在の目標再生フレームが格納されたフレームバッファの状態と上記目標パターンとを比較する比較ステップと、
上記比較ステップにおける比較結果に基づき、新たにデコードが必要な1フレームを抽出すると共に上記現在のフレームバッファの状態で不要になる1フレームを抽出するフレームバッファ制御ステップとを有する再生方法をコンピュータ装置に実行させるための再生プログラム。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005260742A JP4682759B2 (ja) | 2005-09-08 | 2005-09-08 | 再生装置、再生方法および再生プログラム |
US11/516,201 US7881583B2 (en) | 2005-09-08 | 2006-09-06 | Playback apparatus, playback method, and playback program |
EP20060254654 EP1763239A3 (en) | 2005-09-08 | 2006-09-07 | Playback apparatus and method |
CNB2006100641398A CN100556117C (zh) | 2005-09-08 | 2006-09-08 | 重放设备、重放方法以及重放程序 |
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JP2005260742A JP4682759B2 (ja) | 2005-09-08 | 2005-09-08 | 再生装置、再生方法および再生プログラム |
Publications (2)
Publication Number | Publication Date |
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JP2007073151A JP2007073151A (ja) | 2007-03-22 |
JP4682759B2 true JP4682759B2 (ja) | 2011-05-11 |
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JP2005260742A Expired - Fee Related JP4682759B2 (ja) | 2005-09-08 | 2005-09-08 | 再生装置、再生方法および再生プログラム |
Country Status (4)
Country | Link |
---|---|
US (1) | US7881583B2 (ja) |
EP (1) | EP1763239A3 (ja) |
JP (1) | JP4682759B2 (ja) |
CN (1) | CN100556117C (ja) |
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JP5159143B2 (ja) * | 2007-04-04 | 2013-03-06 | アルパイン株式会社 | ビデオシステム |
KR20080090934A (ko) * | 2007-04-06 | 2008-10-09 | 삼성전자주식회사 | 정속 역 재생 방법 및 장치 |
JP4869147B2 (ja) * | 2007-05-10 | 2012-02-08 | キヤノン株式会社 | 画像記録再生装置 |
JP5282383B2 (ja) * | 2007-09-06 | 2013-09-04 | ソニー株式会社 | コンテンツ再生装置、コンテンツ再生方法、プログラム、およびコンテンツ再生システム |
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CN101924847B (zh) * | 2009-06-16 | 2012-06-13 | 宏碁股份有限公司 | 多媒体播放装置及其播放方法 |
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2006
- 2006-09-06 US US11/516,201 patent/US7881583B2/en not_active Expired - Fee Related
- 2006-09-07 EP EP20060254654 patent/EP1763239A3/en not_active Withdrawn
- 2006-09-08 CN CNB2006100641398A patent/CN100556117C/zh not_active Expired - Fee Related
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JP2000101969A (ja) * | 1998-09-17 | 2000-04-07 | Sony Corp | 再生装置及び再生方法 |
JP2001145111A (ja) * | 1999-11-11 | 2001-05-25 | Matsushita Electric Ind Co Ltd | 動画像復号化装置および方法 |
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CN1992869A (zh) | 2007-07-04 |
US20070058928A1 (en) | 2007-03-15 |
JP2007073151A (ja) | 2007-03-22 |
CN100556117C (zh) | 2009-10-28 |
EP1763239A3 (en) | 2010-10-27 |
US7881583B2 (en) | 2011-02-01 |
EP1763239A2 (en) | 2007-03-14 |
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