JPH08505512A - 映像デコーダにおけるチャンネル・バッファの管理 - Google Patents
映像デコーダにおけるチャンネル・バッファの管理Info
- Publication number
- JPH08505512A JPH08505512A JP7512704A JP51270495A JPH08505512A JP H08505512 A JPH08505512 A JP H08505512A JP 7512704 A JP7512704 A JP 7512704A JP 51270495 A JP51270495 A JP 51270495A JP H08505512 A JPH08505512 A JP H08505512A
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- decoding system
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
- H04N21/44004—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving video buffer management, e.g. video decoder buffer or video display buffer
-
- 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
- H04N19/152—Data rate or code amount at the encoder output by measuring the fullness of the transmission buffer
-
- 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
- H04N19/42—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation
- H04N19/423—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation characterised by memory arrangements
-
- 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
- H04N19/42—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation
- H04N19/423—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation characterised by memory arrangements
- H04N19/426—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation characterised by memory arrangements using memory downsizing methods
- H04N19/427—Display on the fly, e.g. simultaneous writing to and reading from decoding memory
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
- H04N21/4382—Demodulation or channel decoding, e.g. QPSK demodulation
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Compression Or Coding Systems Of Tv Signals (AREA)
Abstract
Description
Claims (1)
- 【特許請求の範囲】 1.ピクチャ・データを含む送信チャンネルから受信された映像ビットストリ ームをバッファする手段と、 前記バッファ手段に結合されており、前記ピクチャ・データからのピクチャを 再構成する手段であって、前記ピクチャ・データは、前記バッファ手段が1つの ピクチャに対する前記ピクチャ・データのすべてを受信する際には、前記バッフ ァ手段から前記ピクチャ再構成手段に転送される、手段と、 前記ピクチャ再構成手段に結合されており、前記再構成されたピクチャの表示 を制御し、前記ピクチャ再構成手段と同期されている手段と、 を備えていることを特徴とする映像復号システム。 2.請求項1記載の映像復号システムにおいて、前記ピクチャ再構成手段は、 前記バッファ手段から受信された前記ピクチャ・データを復号する復号手段を含 むことを特徴とする映像復号システム。 3.請求項1記載の映像復号システムにおいて、前記ピクチャ再構成手段は、 複数の前記再構成されたピクチャを記憶する手段を含むことを特徴とする映像復 号システム。 4.請求項3記載の映像復号システムにおいて、前記ピクチャ再構成手段と前 記バッファ手段とは、統合されたメモリを備えていることを特徴とする映像復号 システム。 5.請求項3記載の映像復号システムにおいて、前記ピクチャ記憶手段は、少 なくとも3つの前記再構成されたピクチャを記憶するように構成されていること を特徴とする映像復号システム。 6.請求項1記載の映像復号システムにおいて、前記バッファ手段は、前記1 つのピクチャがいつ受信されたのかを判断する手段を含むことを特徴とする映像 復号システム。 7.請求項6記載の映像復号システムにおいて、前記判断手段はマイクロコン トローラを含むことを特徴とする映像復号システム。 8.請求項1記載の映像復号システムにおいて、前記ピクチャ再構成手段の状 態に応答して前記表示制御手段を同期化するマイクロコントローラを更に備えて いることを特徴とする映像復号システム。 9.請求項1記載の映像復号システムにおいて、前記ピクチャのそれぞれは、 第1及び第2のフィールドを備えており、前記表示制御手段は、ピクチャの再構 成された第1のフィールドの部分を、前記ピクチャ再構成手段が前記ピクチャの 第2のフィールドの部分を処理するのと同時に、処理することを特徴とする映像 復号システム。 10.請求項1記載の映像復号システムにおいて、少なくとも前記ピクチャ再 構成手段と前記表示制御手段とは、モノリシックな集積回路内に形成されること を特徴とする映像復号システム。 11.請求項1記載の映像復号システムにおいて、前記バッファ手段は、ほぼ 2メガバイトのRAMを用いて構成されることを特徴とする映像復号システム。 12.送信チャンネルに結合されており、前記送信チャンネルから受信される ピクチャ・データを含む映像ビットストリームを記憶するチャンネル・バッファ と、 前記チャンネル・バッファに結合されたデコーダと、 前記デコーダに結合され、前記ピクチャ・データからピクチャを再構成する再 構成手段と、 前記再構成されたピクチャを記憶するピクチャ記憶手段と、 前記ピクチャ記憶手段に結合された表示コントローラと、 前記再構成手段の状態に応答して前記表示コントローラを制御する手段と、 を備えていることを特徴とする映像復号システム。 13.請求項12記載の映像復号システムにおいて、前記表示コントローラと 前記ピクチャ再構成手段とは、1つの集積回路デバイス内に形成されることを特 徴とする映像復号システム。 14.請求項12記載の映像復号システムにおいて、前記チャンネル・バッフ ァからピクチャ・データがいつ受信されるかを判断する手段であって、前記ピク チャ・データは前記ピクチャ・データのすべてが前記チャンネル・バッファによ って受信される際に前記デコーダに転送される、手段を含むことを特徴とする映 像復 号システム。 15.請求項12記載の映像復号システムにおいて、前記ピクチャ記憶手段と 前記チャンネル・バッファとは、統合されたメモリ内に形成されることを特徴と する映像復号システム。 16.請求項12記載の映像復号システムにおいて、前記制御手段は、前記チ ャンネル・バッファの状態に応答して前記ピクチャ再構成手段と前記表示コント ローラとの速度を規制するマイクロコントローラを備えていることを特徴とする 映像復号システム。 17.請求項1記載の映像復号システムにおいて、前記制御手段は、前記チャ ンネル・バッファの状態に応答して前記ピクチャ再構成手段と前記表示コントロ ーラとの速度を規制するマイクロコントローラを含むことを特徴とする映像復号 システム。 18.映像ビットストリームを復号する方法において、 ピクチャ・データを含む映像ビットストリームを受信するステップと、 1つのピクチャに対するピクチャ・データのすべてをチャンネル・バッファに 記憶するステップと、 前記1つのピクチャ・データが前記チャンネル・バッファに記憶される際には 、前記1つのピクチャ・データを復号するステップと、 前記1つのピクチャ・データから画像を再構成するステップと、 ピクチャ再構成の速度に応答して、前記再構成されたピクチャを表す映像出力 信号を発生する表示コントローラの速度を制御するステップと、 を含むことを特徴とする方法。 19.請求項18記載の方法において、復号及びピクチャ再構成の前記ステッ プを規制して、前記チャンネル・バッファへの映像ビットストリームのデータ入 力のアンダーフローとオーバーフローとに対して補償する更なるステップを含む ことを特徴とする方法。 20.請求項18記載の方法において、前記1つのピクチャ・データがいつ前 記チャンネル・バッファによって記憶されたかを判断する更なるステップを含む ことを特徴とする方法。 21.請求項18記載の方法において、前記ピクチャのそれぞれは、第1及び 第2のフィールドを含み、前記表示コントローラは、ピクチャの再構成された第 1のフィールドの部分を、前記ピクチャの第2のフィールドの部分の再構成と同 時に、処理することを特徴とする方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/143,198 US5398072A (en) | 1993-10-25 | 1993-10-25 | Management of channel buffer in video decoders |
US143,198 | 1993-10-25 | ||
PCT/US1994/011857 WO1995012277A1 (en) | 1993-10-25 | 1994-10-18 | Management of channel buffer in video decoders |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH08505512A true JPH08505512A (ja) | 1996-06-11 |
JP3942630B2 JP3942630B2 (ja) | 2007-07-11 |
Family
ID=22503027
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP51270495A Expired - Lifetime JP3942630B2 (ja) | 1993-10-25 | 1994-10-18 | 映像デコーダにおけるチャンネル・バッファの管理 |
Country Status (5)
Country | Link |
---|---|
US (2) | US5398072A (ja) |
EP (1) | EP0683955B1 (ja) |
JP (1) | JP3942630B2 (ja) |
DE (1) | DE69431292T2 (ja) |
WO (1) | WO1995012277A1 (ja) |
Families Citing this family (114)
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US5861894A (en) | 1993-06-24 | 1999-01-19 | Discovision Associates | Buffer manager |
US5398072A (en) * | 1993-10-25 | 1995-03-14 | Lsi Logic Corporation | Management of channel buffer in video decoders |
JP2658832B2 (ja) * | 1993-11-12 | 1997-09-30 | 日本電気株式会社 | 動画像復号制御装置 |
US5847765A (en) * | 1993-11-12 | 1998-12-08 | Nec Corporation | Moving picture decoding control system |
JP3192307B2 (ja) * | 1994-02-03 | 2001-07-23 | 松下電器産業株式会社 | 復号ビデオ画像シーケンス再配列方法 |
GB9403983D0 (en) * | 1994-03-02 | 1994-04-20 | Snell & Wilcox Ltd | Video test signals |
CA2145365C (en) | 1994-03-24 | 1999-04-27 | Anthony M. Jones | Method for accessing banks of dram |
CA2145361C (en) | 1994-03-24 | 1999-09-07 | Martin William Sotheran | Buffer manager |
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JP3332580B2 (ja) * | 1994-06-14 | 2002-10-07 | キヤノン株式会社 | 画像再生装置及び画像再生方式 |
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US5606369A (en) * | 1994-12-28 | 1997-02-25 | U.S. Philips Corporation | Buffering for digital video signal encoders using joint bit-rate control |
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US5533021A (en) * | 1995-02-03 | 1996-07-02 | International Business Machines Corporation | Apparatus and method for segmentation and time synchronization of the transmission of multimedia data |
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JP2935340B2 (ja) * | 1995-03-17 | 1999-08-16 | 日本電気株式会社 | ビデオデコード装置 |
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JP3824678B2 (ja) | 1995-05-09 | 2006-09-20 | 株式会社ルネサステクノロジ | 画像復号表示装置 |
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US5774206A (en) * | 1995-05-10 | 1998-06-30 | Cagent Technologies, Inc. | Process for controlling an MPEG decoder |
US5568200A (en) * | 1995-06-07 | 1996-10-22 | Hitachi America, Ltd. | Method and apparatus for improved video display of progressively refreshed coded video |
DE19524808A1 (de) * | 1995-07-07 | 1997-01-09 | Thomson Brandt Gmbh | Verfahren, Encoder und Decoder zur Resynchronisierung auf einen fehlerbehafteten Datenstrom |
US9832244B2 (en) * | 1995-07-14 | 2017-11-28 | Arris Enterprises Llc | Dynamic quality adjustment based on changing streaming constraints |
US5659539A (en) * | 1995-07-14 | 1997-08-19 | Oracle Corporation | Method and apparatus for frame accurate access of digital audio-visual information |
US7512698B1 (en) | 1995-07-14 | 2009-03-31 | Broadband Royalty Corporation | Dynamic quality adjustment based on changing streaming constraints |
JP3475985B2 (ja) * | 1995-11-10 | 2003-12-10 | ソニー株式会社 | 情報符号化装置および方法、情報復号化装置および方法 |
KR0176803B1 (ko) * | 1995-12-29 | 1999-04-15 | 구자홍 | 디브이디 플레이어의 브이비알 처리회로 |
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US5398072A (en) | 1995-03-14 |
EP0683955A4 (en) | 1999-03-03 |
JP3942630B2 (ja) | 2007-07-11 |
WO1995012277A1 (en) | 1995-05-04 |
DE69431292D1 (de) | 2002-10-10 |
EP0683955A1 (en) | 1995-11-29 |
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