CN1322440A - Scalable system for video-on-demand - Google Patents
Scalable system for video-on-demand Download PDFInfo
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- CN1322440A CN1322440A CN00802060A CN00802060A CN1322440A CN 1322440 A CN1322440 A CN 1322440A CN 00802060 A CN00802060 A CN 00802060A CN 00802060 A CN00802060 A CN 00802060A CN 1322440 A CN1322440 A CN 1322440A
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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
- H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
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- 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
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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
- H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
- H04N21/4331—Caching operations, e.g. of an advertisement for later insertion during playback
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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, rendering scenes according to MPEG-4 scene graphs
- H04N21/44016—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 splicing one content stream with another content stream, e.g. for substituting a video clip
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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
- H04N21/47—End-user applications
- H04N21/472—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content
- H04N21/47202—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content for requesting content on demand, e.g. video on demand
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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
- H04N21/47—End-user applications
- H04N21/472—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content
- H04N21/47208—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content for requesting near-video-on-demand content
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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]
- H04N21/80—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
Abstract
A VOD service is emulated in an NVOD architecture. Content information is made available to an end-user in the NVOD architecture. An introductory portion of the content information is stored at the end-user's equipment, e.g., by downloading overnight. During playing out of the introductory portion at the end-user enabling the content information supplied in the NVOD architecture is buffered at the end-user's equipment. The equipment is controlled to switch from playing out the introductory portion stored to playing out the buffered content information.
Description
Background of invention
The present invention be more particularly directed to utilize any transmission network (for example cable TV and the Internet) to remove the system and method for realizing that video request program (VOD) is professional.
Technical background
The VOD transmission system is a kind of like this system, and it provides programme information by the bidirectional transmission path between supply center and user.On wider meaning, the VOD transmission system should be able to be handled the multimedia messages that comprises still image, high quality television image and computer software etc.Yet owing to system only is used to handle film or TV programme usually, so term " VOD transmission system " is normally used within the narrower category.Therefore say that typically term " video request program (VOD) " is exactly to be expressed as follows this business: promptly the user can select video resource from central server, and watches by TV or PC display.Because the needed data volume of video information is very big, so can not adapt to the requirement of a large number of users by data network (for example the Internet) VOD that realizes.The VOD business need takies the network bandwidth of non-constant width, and needs volume server.Near-VOD (NVOD) but be the solution of a kind of VOD user capacity compatibilization (Scalability) problem.But in this case, the user can not control video resource veritably: promptly the user can not control the time started of program, program is suspended or vision signal is returned down.In the NVOD Promgramming, interactive entertainment system sends the version (promptly broadcast some versions that duplicate of described application, the zero-time of each version differs a unique preset time increment) of several time migrations of same interactive application to the user of all common share communication paths with the form of broadcasting.Typically, interactive system utilizes the NVOD business to go to provide the multiple form of expression of a film, and wherein the zero-time of every kind of form of expression all staggers, and makes that it is identical not having the zero-time of two forms of expression.
A kind of VOD system has just been described, comprising the server that carries out work with near-video-on-demand (NVOD) pattern in disclosed European patent application EP O 749 242 A1.This server transmits a plurality of copies by a plurality of independent transmission NVOD channels for each program.From the time, exist between the same program that is transmitted in the specific program that is transmitted in NVOD channel and another NVOD channel one regular time spacing bias.Resulting like this result is: the different time progress stage that occurs same program in the different N VOD channel.According to the request of the specific program that receives from client computer, server sends to the start-up portion of program the client computer of filing a request by VOD channel (it is not the NVOD channel).The time span of the start-up portion that is provided will be equal to or less than the time interval of staggering.Client computer is controlled, so that begin to record in progress program on a specific NVOD channel.This specific NVOD channel is exactly that last begins the channel of program transmission before filing a request constantly.So just can guarantee from a certain particular moment, between the recording and play of start-up portion, have the overlapping of the information content.Say this overlapping seamless transitions that can guarantee in principle from the VOD channel to specific NVOD channel switching.
The shortcoming of this known system is: wherein can not be at number of users and increase-volume.In order to realize the NVOD pattern, the request of each start-up portion is all needed an independent VOD channel for the terminal use, and need the NVOD channel designator.
Summary of the invention
One object of the present invention is to provide a kind of new method of imitating the VOD business in the NVOD structure.Another purpose is to provide a kind of method that allows increase-volume.In the method for the invention, content information can use for the terminal use of NVOD structure.The introductory section of content information can be stored in terminal use's the equipment.When the terminal use plays introductory section, content information that can buffer memory is supplied by the NVOD structure in end user device.This method can also switch to the content information that broadcast is buffered from playing stored introductory section.Comprise a plurality of programs at one in the content information more in the certain embodiments, comprise the various piece in the middle of a plurality of introductory sections relevant in the introductory section with each program in the middle of a plurality of programs.The handover operation of this moment will comprise and can transfer to the broadcast specific program relevant with specific introductory section from playing specific introductory section.
The inventor proposes: the start-up portion that store all available under the NVOD pattern different programs at user's client computer place.Like this user just can be in its oneself memory device (wherein preferably will comprise harddisk memory) carry out channel and browse, and on the basis of institute's storage area, select.In case certain part is selected and begin broadcast, then begin to record the content in the relevant NVOD channel, for this specific program, this correlated channels is constantly approaching with selection in time.Introductory section is carried out local storage can be so that system can increase-volume.Introductory section can be stored in advance, for example can from specific television channel, record and obtain in evening before that day, perhaps can download and obtain from data network (for example the Internet), perhaps can from the storage of physical equipment, obtain (for example DVD or have the storage card of solid state semiconductor memory, such as flash card).
Video flowing by the IP network transmission requires data are carried out buffer memory.Require the purpose of this buffer memory to be: the negative effect of IP network low quality business is reduced to minimum.Will cause zero-time to have time delay like this.Support of the present invention for example is located at the local mass storage capability in the set-top box (STB), and utilizes the NVOD business to go to imitate the VOD business.The start-up portion of all films of storage in the local mass-memory unit of datacasting in set-top box.When the user selected to watch a certain certain movie, STB began to play this film from local memory device.Meanwhile, STB be tuned on the suitable NVOD channel, and begin the remainder of this film is carried out buffer-stored.The time span of the local partial film of being stored needn't be longer than the staggered time interval of program in the NVOD business.STB can provide the instantaneous starting of cineloop.Because STB carried out buffer memory to video flowing, thus the user can resemble go to suspend the broadcast of film the control VCR or realize film return.Certainly, the F.F. that exceeds the current cache content is impossible.If buffer is (promptly when buffer was full, fresh content will go to cover the old content of having stored) that recycles, then exceeding what be capped content is impossible soon too.
According to user profiles and individual character, can go to select automatically which film need be stored in the middle of the local mass-memory unit.
The user equipment (ue) device that is used to store introductory section can be same device with the device that is used for the content information that buffer memory NVOD provided, but also needn't be identical.If there are two kinds of independent devices, then require them to coact, make when a kind of device switches to another kind of device and plays, thisly can reduce to minimum by the discernable influence of interrupting causing.If they are same memory devices, the then operation that requires permission to read and to write this memory device simultaneously.
The accompanying drawing summary
Below by example and explain the present invention with reference to the accompanying drawings, comprise in the accompanying drawing:
Fig. 1 is the block diagram of NVOD server system among the present invention;
Fig. 2 is the user block diagram that links to each other with Fig. 1 system with Fig. 3; And
Fig. 4 is the block diagram of some details of client computer.
In all accompanying drawings, identical reference number is represented similar or corresponding part.
Preferred embodiment
At first go through the analog video situation.And then discussion Digital Video System.
Fig. 1 is the block diagram that is used for the NVOD server system 100 of transportation simulator video and audio frequency.System 100 comprises analogue audio frequency/video (A/V) source 102 (for example video tape recorder VTR), frame counter 104, and data are inserted subsystem 106 and storage subsystem 108.A/V source 102 can provide simulation A/V programme content, and the frame of 104 pairs of A/V content introduction parts of counter is counted, and subsystem 106 will be added on frame number among the associated frame VBI (field blanking at interval) afterwards as data.Perhaps, only in the end insert sign among the VBI of one of last several frames of a frame or A/V programme content start-up portion back.Whether this sign expression should switch.For example consider the time of implementation of exchange control procedure, therefore preferably after frame second from the bottom, insert sign.In storage system 108, store the A/V content then, comprising those labeled frames in each A/V program introductory section.Also comprise program information generator 110 in the system 100, download scheduler 112 is used for inserting at VBI the subsystem 114 of data, and with the interface 116 of transmission network 118.Maker 110 can produce programme information under the control of download scheduler 112.The quantity (being the quantity of labeled frame) of the frame that this programme information comprises in the introductory section being comprised, and for example title, content owner's name and author's the information such as name of program.Scheduler 112 is used to judge the frequency that program is provided, and when the introductory section of each program can offer transmission network 118 and use, do not store thereby in client computer, (draw), for example every night from 3:00 AM to 4 points.Subsystem 114 was inserted into the information that maker 110 produces among the VBI in the incipient stage of each program (these programs all will be downloaded to user side by network 118) introductory section.
Fig. 2 is the block diagram of client computer 200, is used for receiving the introductory section from system's 100 A/V content program that download and that store in this locality.Client computer 200 comprises interface 202, VBI analyzer 204, memory 206, A/D converter 208 and 210, MEPG encoder 212 and 214, multiplexer 216 and memory 218.
Interface 202 connects client computer 200 and transmission network 118, and voice-frequency channel and video frequency channel are provided.Analyzer 204 is connected to video frequency channel, and VBI information is analyzed.Analyzer 204 extracts those programme informations that produced by maker 110, for example program title, content owner's name and author's name or the like information.Analyzer 204 also extracts the sequence number of the labeled frame of video in the program introductory section, and current received frame number.The total quantity of programme information and labeled frame all is stored in the memory 206.A/D converter 208 is being converted into digital video signal by network 118 received analog video signals.Digital video signal is sent to MPEG 212 encoders then, and digital video signal is compressed.A/D converter 210 is forming digital audio and video signals by network 118 received simulated audio signal codings.This digital audio and video signals compresses in mpeg encoder 214.By multiplexer 216, digital audio and vision signal through overcompression are stored in the memory 218 then.
Fig. 3 is the block diagram of client computer 200 among Fig. 2, wherein provides the part that is used for the broadcast program content.The part of in Fig. 2, being introduced, also comprise a buffer 302 in the client computer 200, have switch 304, controller 308 and the frame counter 310 of output 306.When the user began to play the introductory section that is stored in the specific A/V content program in the local storage facilities 208, switch 304 will be on the position that connects output 306 and memory device 218.Counter 310 is followed the tracks of the frame that memory device 218 is provided always.Controller 308 receives the number of frames signal that expression is provided by memory device 218.Controller also receives the total quantity that comprises frame in the stored introductory section from database 206.The total quantity of the frame of the quantity of the frame that controller 308 relatively receives from counter 310 and the introductory section of being stored.Equate if controller determines these two numerical value, then switch 304 is controlled, be connected to buffer 302.
Buffer 302 receives the digitized content through overcompression, and these contents are provided by the system 100 that works in the NVOD pattern, and be by A/D converter 208 and 210 and encoder 212 and 214 received by client computer 200.The scale of buffer 302 is determined at interval by the staggered time of NVOD, and next it can determine the needed length of introductory section again.When the user begins to play out program introductory section in the local storage 218, select last to begin to provide the particular channel of same program in the NVOD program of system 100 in transmission network 218.The information that is used to control this selection for example can be from database 206.The last frame of supposing introductory section obtains from local storage 218.Owing to require to have in the content covering, so in buffer 302, can have some identical frames.All frames have all been done label or have been marked in the introductory section.Therefore controller 308 can be controlled buffer 302 and in the end remove to begin to provide this frame after a labeled frame.
Fig. 4 illustrates in further detail to switch 304.Switch 304 comprises demodulation multiplexer 402 and 404, audio decompressor 406 and 408, Audio mixer 410, D/A converter 412, video path switch 414, decoder 416 and D/A converter 418.Demodulation multiplexer 402 is connected to the input A of switch 304, and demodulation multiplexer 404 is connected to the input B (see figure 3) of switch 304.Each demodulation multiplexer 402 and 404 all produces video flowing and audio stream.
Audio stream from demodulation multiplexer 402 is sent to decompressor 406.Audio stream from demodulation multiplexer 404 is sent to decompressor 408.Decompressor 406 and 408 output are connected to the data input pin of blender 410.Blender 410 is accepted the control of controller 308.The output of blender 410 is connected to the D/A converter 412 that analogue audio frequency output can be provided.Blender 410 is controlled, so that produce glitch-free audio signal, this is for example also progressively to stop using the audio signal from local storage 218 to realize by progressively adopting from the signal of buffer 302.
Video flowing switches between two frames from input A and input B in switch 414.Switch 414 also will be subjected to the control of controller 308.Will in decoder 416, produce the continuous number video bit stream like this, in D/A converter 418, these bit streams are converted into for the analog signal output of playing then through decoding.The video coding mode is preferably such, and promptly can make last frame is not B frame (bidirectional frame).In other words be exactly that the decoding of introductory section last frame does not need to exist a subsequent frame.And coded system is preferably also like this, and promptly first frame that is provided by buffer 302 is an I frame (frame interior), and the decoding of this frame does not need former frame.This restriction can guarantee that the output of switch 414 is continuous video flowings.
Above-mentioned example all relates to the analog signal content.The situation of relevant digital content will be simple relatively.Digital video bit stream all has time mark.Therefore they can be cut off at any frame transition, use the reasonable time mark to splice again as a reference then, regenerate duplicate bit stream.In order to realize the notion of VOD, the time mark at place, program introductory section end need be sent to client computer in download phase.In order to splice programme content, client computer will compare the current time mark of time mark (end of its expression introductory section) of being stored and the bit stream that is played out from local memory device.When signal relatively obtained identical time mark, client computer just switched to buffer to video source from local memory device.On function, the system configuration that is used for digital content is similar to the analog case of above-mentioned discussion, but wherein do not comprise A/D and D/A converter 208,210,412 and 418, do not comprise compressor reducer 212 and 214 and decompressor 406 and 408 yet, nor comprise the parts that are used for the processed frame sequence number, nor need Audio mixer 410.
In description of the present invention, introduce following patent documentation as a reference:
--U.S. Patent application (the attorney docket PHA23633 of Yevgeniy Eugene Shteyn, sequence number No.09/283545, on April 1st, 1999 submitted to, and title is " based on the individualized TV (TIME-AND LOCATION DRIVEN PERSONALIZEDTV) of time and position ".The document relates to a kind of like this server system, wherein can make the user select specific broadcast program to record, and can select certain location and time period to play institute's recorded program.
--the United States Patent (USP) (attorney docket PHA 23495) of Raoul Mallart, sequence number No.09/149950, on September 9th, 1998 submitted to, and title is " utilizing emulation stream to carry out real-time video-game (REAL-TIME VIDEO GAME USESEMULATION OF STREAMING OVER THE INTERNET IN A BORADCASTEVENT) by the Internet in the broadcast event ".In the broadcasted application of client computer one server type network, the data flow in the Internet is modeled into animation data and sends to a large amount of client computer.This animation is regarded a series of states.What be sent to the user is this state information, rather than sends image data itself.Under the control of state information, client computer is recovered animation data again.The object agreement that server and client computer utilization are shared communicates.So just realize the transmission of data flow, and in broadcasting process, also can not run into serious network bandwidth problem.This method can be used for real life event (for example motor racing car) is mapped to virtual environment, make the user can equally with real professional athlete participate in virtual match, the dynamic change of this virtual environment is determined by sending to the state of user variation.
The United States Patent (USP) of-Raoul Mallart and Atul Sinha (attorney docket PHA23491), sequence number No.09/138782, on August 24th, 1998 submitted to, and title is " carrying out data flow simulation (EMULATION OF STREAMING OVERTHE INTERNET IN A BROADCAST APPLICATION) by the Internet in the broadcasted application ".The document relates to the broadcasted application in the client-server type network, and wherein the data flow in the Internet is modeled into animation data and sends to a large amount of client computer.This animation is taken as a series of states.This state information is sent to the user, rather than sends image data itself.Under the control of state information, the user recovers animation data again.Server and user utilize shared object agreement to communicate.So just realize the transmission of data flow, and in broadcasting process, can not run into serious network bandwidth problem.
The United States Patent (USP) of-Raoul Mallart and Atul Sinha (attorney docket PHA23383), sequence number No.09/053448, on April 1st, 1998 submitted to, and title is " utilizing the 3D rendering model of broadcast event to carry out group-wise video conferencing (GROUP-WISE VIDEOCONFERENCING USES 3D-GRAPHICS MODEL OF BROADCAST EVENT) ".The document relates to the visual broadcast service that utilizes conference model to concentrate in together but be distributed in the terminal use of different geographic regions.According to the broadcasting particular event, the specific end user group can be switched to conference model under the control of software, makes this user's group to discuss to a certain incident.Conference model can improve by the 3D graphical model that is downloaded to this incident video representation in this user's group.The terminal use can carry out mutual so that other scheme of this problem is discussed with model.
Claims (11)
1. imitate the method for VOD business in NVOD structure (108), this method comprises:
-content information can be used for the terminal use (200) of NVOD structure;
-be enabled in the end user device storage (218) to the introductory section of content information;
-play in the process of introductory section at end user location, be enabled in the buffer memory (302) of end user device place to resulting content information in the NVOD structure;
-start from playing the switching of the content information that stored introductory section is buffered to broadcast.
2. the process of claim 1 wherein:
Comprise a plurality of programs in the-content information;
Comprise the various piece in the middle of a plurality of introductory sections relevant in the-introductory section with each program in the middle of a plurality of programs; And
-described startup switching comprises that the specific part of startup from play introductory section is to the transfer of playing a specific program in a plurality of programs relevant with this specific introductory section.
3. the method in the claim 1, wherein:
-content information is broadcasted by data network (118);
-introductory section provides by data network.
4. the method in the claim 1, wherein:
-content information is broadcasted by TV network; And
-introductory section provides by TV network.
5. the method in the claim 1, wherein:
-content information is broadcasted by TV network; And
-introductory section provides by data network.
6. the process of claim 1 wherein that introductory section is provided for the terminal use, and be stored in the physical equipment.
7. the method in the claim 2, wherein:
-content information comprises the frame of analog form;
-described startup is switched and is comprised the successive frame in the introductory section in the VBI signal is marked (104/106); And
-control described switching by described mark.
8. the method for claim 2, wherein:
-content information comprises the frame of the digital form with time mark; And
-control described switching by described time mark.
9. employed client apparatus (200) in the client-server system of imitation VOD business in the NVOD structure, wherein:
Comprise in-described the system content information is offered the server (108) that the client computer under the NVOD pattern is used;
Comprise the memory device (218) that is used for the content information stored introductory section in the-client computer;
Be included in the buffer (302) that is used to be buffered in resulting content information under the NVOD pattern when playing introductory section in the-client computer;
Bag is used to control from playing from the introductory section of memory and draws together switch (304) to playing from the switching of the content information of buffer in the-client computer.
10. the client apparatus in the claim 9, wherein:
-server provides available content messages with analog form;
Comprise the frame that has label in the-introductory section;
Comprise the analyzer (204) that is used to extract the information relevant in the-client computer with label; And
Comprise the controller (308) that is used under information Control, going to control handover operation among the-user.
11. the client apparatus in the claim 9, wherein:
-server provides the available content messages that has time mark with digital form; And
Comprise the controller that is used for down to control handover operation in the-client computer in the control of time mark.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US40664299A | 1999-09-27 | 1999-09-27 | |
| US09/406,642 | 1999-09-27 | ||
| US09/406642 | 1999-09-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1322440A true CN1322440A (en) | 2001-11-14 |
| CN1157062C CN1157062C (en) | 2004-07-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB008020604A Expired - Fee Related CN1157062C (en) | 1999-09-27 | 2000-09-15 | Scalable system for video-on-demand |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1138154A1 (en) |
| JP (1) | JP2003510982A (en) |
| KR (1) | KR20010080591A (en) |
| CN (1) | CN1157062C (en) |
| WO (1) | WO2001024526A1 (en) |
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| CN101635827B (en) * | 2009-08-27 | 2013-09-11 | 中兴通讯股份有限公司 | Method for realizing carousel channels, media control server and carousel channel system |
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| US5701582A (en) * | 1989-08-23 | 1997-12-23 | Delta Beta Pty. Ltd. | Method and apparatus for efficient transmissions of programs |
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| WO1997018672A1 (en) * | 1995-11-13 | 1997-05-22 | Sony Corporation | Near video on-demand system and televising method of the same |
-
2000
- 2000-09-15 EP EP00962497A patent/EP1138154A1/en not_active Withdrawn
- 2000-09-15 JP JP2001527567A patent/JP2003510982A/en active Pending
- 2000-09-15 CN CNB008020604A patent/CN1157062C/en not_active Expired - Fee Related
- 2000-09-15 KR KR1020017006601A patent/KR20010080591A/en not_active Application Discontinuation
- 2000-09-15 WO PCT/EP2000/009078 patent/WO2001024526A1/en not_active Application Discontinuation
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100366086C (en) * | 2002-01-23 | 2008-01-30 | 汤姆森特许公司 | Multimedia on demand for use in a near on demand environment |
| CN100459700C (en) * | 2004-11-16 | 2009-02-04 | 南京大学 | Method for realizing video requesting system based on protocol buffer storage |
| CN114189727A (en) * | 2021-03-04 | 2022-03-15 | 浙江宇视科技有限公司 | Synchronous playing method, device, system, electronic equipment and readable storage medium |
| CN114189727B (en) * | 2021-03-04 | 2024-04-05 | 浙江宇视科技有限公司 | Synchronous playing method, device, system, electronic equipment and readable storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1138154A1 (en) | 2001-10-04 |
| CN1157062C (en) | 2004-07-07 |
| JP2003510982A (en) | 2003-03-18 |
| WO2001024526A1 (en) | 2001-04-05 |
| KR20010080591A (en) | 2001-08-22 |
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