JP4729570B2 - トリックモードおよび速度移行 - Google Patents
トリックモードおよび速度移行 Download PDFInfo
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- JP4729570B2 JP4729570B2 JP2007522794A JP2007522794A JP4729570B2 JP 4729570 B2 JP4729570 B2 JP 4729570B2 JP 2007522794 A JP2007522794 A JP 2007522794A JP 2007522794 A JP2007522794 A JP 2007522794A JP 4729570 B2 JP4729570 B2 JP 4729570B2
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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
- H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
- H04N21/4347—Demultiplexing of several video streams
-
- 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]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary 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
- H04N19/102—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
- H04N19/103—Selection of coding mode or of prediction mode
- H04N19/114—Adapting the group of pictures [GOP] structure, e.g. number of B-frames between two anchor frames
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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
-
- 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]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs
- H04N21/23406—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving management of server-side video buffer
-
- 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]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs
- H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
-
- 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]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
- H04N21/2365—Multiplexing of several video streams
-
- 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]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
- H04N21/2387—Stream processing in response to a playback request from an end-user, e.g. for trick-play
-
- 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]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
- H04N21/262—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists
- H04N21/26208—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists the scheduling operation being performed under constraints
- H04N21/26233—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists the scheduling operation being performed under constraints involving content or additional data duration or size, e.g. length of a movie, size of an executable file
-
- 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, rendering scenes according to MPEG-4 scene graphs
- H04N21/44004—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 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
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
- H04N21/845—Structuring of content, e.g. decomposing content into time segments
-
- 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]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
- H04N21/845—Structuring of content, e.g. decomposing content into time segments
- H04N21/8456—Structuring of content, e.g. decomposing content into time segments by decomposing the content in the time domain, e.g. in time segments
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
- H04N5/93—Regeneration of the television signal or of selected parts thereof
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/12—Systems in which the television signal is transmitted via one channel or a plurality of parallel channels, the bandwidth of each channel being less than the bandwidth of the television signal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/16—Analogue secrecy systems; Analogue subscription systems
- H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
- H04N7/17309—Transmission or handling of upstream communications
- H04N7/17336—Handling of requests in head-ends
Description
underflow)」が生じる可能性がある。1実施形態において、GOPの長さおよびタイムスロットを、その後続GOPのサイズの関数とすることができる。例えば、図1のサンプル分布が示すように、一部のIフレームは2フレームという短いタイムスロットのみを必要とし、他のIフレームは6フレームという長さである場合もある。
前記バッファは、前GOPからのいくつかのダミーBフレームおよびPフレームを含むことができ、最大バッファレベルを次のように算出することができる。bufferJevel[j]=size[j]+(frames[i]−l)*P+(frames[i−l]−l)*P。現在トリックモードパケットの伝送中に前GOPからのダミーBフレームおよびPフレームが消費されるので、実際のバッファレベルは上記数値より低くなる場合がある。前記バッファレベルは、オーバーフロー対策として多めに予測される場合がある。現在トリックモードパケットのDTS(すなわちIフレームDTS)で、前GOPからのデータは消費済みである場合があり、その場合、そのバッファレベルは次のように算出することができる:bufferJevel[j]=size[j]+(frames[j]−l)*P。
frame_size[0]=((SrreamDTS−StreamPCR)/27000000.0)*(bI/8)。
一部のビデオストリーム(例えばMPEG2)は、3:2のプルダウンを実行する方法として、「repeat first field」および「top field first」といったいくつかの特別なフラグを使う場合がある。それらのストリームでフィールド継続性を維持するために、ある特定の方法をその移行シーケンスに適用することができる。
Claims (1)
- 帯域調整モジュールを有するシステムのためにデータストリームを通信する方法であって、
(A)前記帯域調整モジュールにより、第1のデータストリームのための第1のタイムスロットを決定する工程と、
(B)前記帯域調整モジュールにより、第2のデータストリームのための第2のタイムスロットを決定する工程と、
(C)前記帯域調整モジュールにより、前記第2のデータストリームが前記第2のタイムスロットより大きい場合、当該第2のデータストリームの一部を前記第1のタイムスロットに移動する工程と、
前記工程(C)は、
前記帯域調整モジュールにより、前記第2のデータストリームのタイムスロット数、フレーム数、ビットレート及びフレームレートに基づき前記移動部分の量を決定する工程、
を更に有し、
前記第1のタイムスロットは前記第2のタイムスロットの前に生じる、
ことを特徴とする方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US59050404P | 2004-07-23 | 2004-07-23 | |
US60/590,504 | 2004-07-23 | ||
PCT/US2005/026011 WO2006012496A2 (en) | 2004-07-23 | 2005-07-22 | Trickmodes and speed transitions |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2010276408A Division JP2011050117A (ja) | 2004-07-23 | 2010-12-10 | トリックモードおよび速度移行 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2008507922A JP2008507922A (ja) | 2008-03-13 |
JP4729570B2 true JP4729570B2 (ja) | 2011-07-20 |
Family
ID=35057113
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2007522794A Active JP4729570B2 (ja) | 2004-07-23 | 2005-07-22 | トリックモードおよび速度移行 |
JP2010276408A Pending JP2011050117A (ja) | 2004-07-23 | 2010-12-10 | トリックモードおよび速度移行 |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2010276408A Pending JP2011050117A (ja) | 2004-07-23 | 2010-12-10 | トリックモードおよび速度移行 |
Country Status (6)
Country | Link |
---|---|
US (1) | US20060146780A1 (ja) |
EP (1) | EP1772016A2 (ja) |
JP (2) | JP4729570B2 (ja) |
KR (1) | KR100868820B1 (ja) |
CN (1) | CN101010959B (ja) |
WO (1) | WO2006012496A2 (ja) |
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- 2005-07-22 KR KR1020077003898A patent/KR100868820B1/ko active IP Right Grant
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- 2005-07-22 US US11/187,202 patent/US20060146780A1/en not_active Abandoned
- 2005-07-22 EP EP05775427A patent/EP1772016A2/en not_active Withdrawn
- 2005-07-22 JP JP2007522794A patent/JP4729570B2/ja active Active
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2010
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Also Published As
Publication number | Publication date |
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CN101010959B (zh) | 2012-01-25 |
JP2011050117A (ja) | 2011-03-10 |
US20060146780A1 (en) | 2006-07-06 |
KR20070064316A (ko) | 2007-06-20 |
WO2006012496A3 (en) | 2006-06-15 |
EP1772016A2 (en) | 2007-04-11 |
KR100868820B1 (ko) | 2008-11-14 |
WO2006012496A2 (en) | 2006-02-02 |
JP2008507922A (ja) | 2008-03-13 |
CN101010959A (zh) | 2007-08-01 |
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