CN101355689B - Method and system for controlling VOD of digital television as well as digital television receive terminal - Google Patents
Method and system for controlling VOD of digital television as well as digital television receive terminal Download PDFInfo
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- CN101355689B CN101355689B CN2008101418688A CN200810141868A CN101355689B CN 101355689 B CN101355689 B CN 101355689B CN 2008101418688 A CN2008101418688 A CN 2008101418688A CN 200810141868 A CN200810141868 A CN 200810141868A CN 101355689 B CN101355689 B CN 101355689B
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Abstract
The invention is applied to the digital television technical field, providing a method for controlling the video request of a digital television, a system thereof and a digital television receiving terminal thereof. The method comprises the following steps that: whether the communication environment of the present IP network is jammed is judged, if jammed, the digital television receiving terminal is controlled to be switched from the video request in the IPTV mode to the video broadcast in the digital television broadcast mode which transmits the video flow by the digital television network. According to the communication environment of the preset IP network detected, the invention can automatically control whether the digital television receiving terminal makes the video request in the IPTV mode, thereby avoiding that the video request in the IPTV mode is made when the present IP network is not suitable and ensuring the smooth playing of the video programs; moreover, in the invention, the IP network and the digital television network are combined together, thereby promoting the combination of three networks.
Description
Technical field
The invention belongs to the digital television techniques field, relate in particular to a kind of digital TV video frequency on-demand control method, system and receiving terminal for digital television.
Background technology
Along with the development of digital video, dual-mode set-top box also more and more is subject to liking of user, and so-called dual-mode set-top box refers to, both can be operated in the IPTV pattern, carries out video request program (Video On Demand, VOD), watches excellent video by IP network; Also can be operated in the digital television broadcasting pattern, watch live television programming by the digital television signal of digital TV network transmission.
At present, the general VOD that all adopts IP based network, because the amount of information of vision signal is huge, take a lot of transmission bandwidths, often cause the obstruction of network, particularly busy at server, when visit capacity is excessive, the transmission of video data is often owing to bandwidth becomes slow not, cause video playback not smooth, interrupt even.
The way of available technology adopting load-balanced server, the specific works flow process is: receiving terminal for digital television sends order request to load-balanced server; Load-balanced server receives order request, and the resource operating position of checking connected each vod server is inquired about the vod server of current the best; The URL of best vod server is returned to digital TV terminal, the request of receiving terminal for digital television is redirected to this best vod server, make receiving terminal for digital television and this best vod server set up real-time streaming protocol (Real Time Streaming Protocol, RTSP) and realize alternately video request program.In the prior art, in rationally sharing system load sowing time of initial video point, visit capacity is excessive, IP network is stopped up but can not solve in the video display process, the problem that video can not smooth playing.
Summary of the invention
The purpose of the embodiment of the invention is to provide a kind of digital TV video frequency on-demand control method, is intended to solve prior art excessive in the media server accesses amount, and IP network occurs when congested, is difficult to guarantee the problem of video smooth playing.
The embodiment of the invention is achieved in that a kind of digital TV video frequency on-demand control method, and described method comprises the steps:
It is congested whether the communication environment of judging the current IP network occurs, and is that then the control figure television receive terminal switches to video playback by the digital television broadcasting pattern of digital TV network transmitting video-frequency flow from the video request program of IPTV pattern; Otherwise the control figure television receive terminal is proceeded the video request program of IPTV pattern; Specifically comprise:
If it is congested that IP network occurs, then receiving terminal for digital television sends the switching server order to media control centre, notice media control centre switching server;
Media control centre receives the switching server order from receiving terminal for digital television, obtains the video flowing that carries out program request from media server for subsequent use;
After media control centre gets access to the video flowing that carries out program request, distribute frequency to it, and send this frequency point information to receiving terminal for digital television;
Media control centre will be sent to the digital television signal video server from the video flowing that carries out program request that media server for subsequent use obtains;
The digital television signal video server is modulated receiving video flowing, transmits video flowing after this modulation to receiving terminal for digital television by digital TV network;
Receiving terminal for digital television is resolved described frequency point information and this frequency is carried out frequency locking, and the video flowing that the receiving digital television signal video server sends is also play.
Another purpose of the embodiment of the invention is to provide a kind of receiving terminal for digital television, and described receiving terminal for digital television comprises:
IPTV video request program unit is used for receiving the video on-demand request instruction of IPTV pattern, and receiver, video stream is play this video;
Whether the IP network detecting unit exists congested for detection of the communication environment of current IP network;
Video request program pattern switch control unit, be used for sending the switching server order, request changes the video flowing of playing by IP network by digital TV network into to be transmitted, if switching server success, the receiving media control centre frequency point information of distributing then, and after the video flowing that carries out program request that media control centre will obtain from media server for subsequent use is sent to the digital television signal video server, the control figure television receive terminal receives by the video flowing after the modulation of digital TV network transmission, and the video flowing after this modulation is carried out Play Control.
Another purpose of the embodiment of the invention is to provide a kind of digital TV video frequency program request control system that comprises described receiving terminal for digital television, and described system comprises:
Media server, media control centre, media server for subsequent use and digital television signal video server; Wherein be based on being connected of IP network between receiving terminal for digital television and the media server, all be based on being connected of IP network between media control centre and receiving terminal for digital television, media server for subsequent use and the digital television signal video server, be connected by digital TV network between receiving terminal for digital television and the digital television signal video server;
Receiving terminal for digital television, be used for to receive the video on-demand request instruction of the IPTV pattern that the user sends, and whether the communication environment that detects the current IP network exists congested, then to send the switching server order to media control centre, behind the handover success, receive and play the video flowing from the digital television signal video server; Otherwise continue reception and broadcast from the video flowing of media server;
Media server is used for depositing the video flowing that carries out video request program, and the order request of responding digital television receive terminal sends video flowing to receiving terminal for digital television;
Media control centre, be used for receiving the switching server order from receiving terminal for digital television, obtain the video flowing that carries out program request from media server for subsequent use, distribute the frequency point information of this video flowing of transmission to receiving terminal for digital television, and send this video flowing to the digital television signal video server;
Media server for subsequent use is used for depositing the video flowing that carries out video request program;
The digital television signal video server is used for receiving media control centre from the video flowing that media server for subsequent use obtains, and is modulated into radiofrequency signal, is transferred to receiving terminal for digital television by digital TV network.
In an embodiment of the present invention, communication environment according to the current IP network that detects, automatically whether the control figure television terminal carries out video request program by the IPTV pattern, avoided in the unaccommodated situation of current IP network, carrying out video request program by the IPTV pattern, take full advantage of the superiority bandwidth of the digital TV network of broadcasting and TV, thereby guaranteed the fluency of video program play.
Description of drawings
Fig. 1 is the structural representation of the digital TV video frequency program request control system that provides of the embodiment of the invention;
Fig. 2 is the realization flow figure of the digital TV video frequency on-demand control method that provides of the embodiment of the invention;
Fig. 3 is the detailed realization flow figure of the digital TV video frequency on-demand control method that provides of the embodiment of the invention;
Fig. 4 is that the receiving terminal for digital television that the embodiment of the invention provides carries out the realization flow figure that video request program is controlled;
Fig. 5 is the structural representation of the receiving terminal for digital television that provides of the embodiment of the invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
In embodiments of the present invention, carry out video request program according to the automatic control figure television terminal of the communication environment of the current IP network that detects by IPTV pattern or digital television broadcasting pattern, thereby guaranteed the fluency of video program play.
Fig. 1 shows the structure of the digital TV video frequency program request control system that the embodiment of the invention provides, and for convenience of explanation, only shows the relevant part of the embodiment of the invention.This digital TV video frequency program request control system comprises: receiving terminal for digital television 11, media server 12, media control centre 13, media server for subsequent use 14 and digital television signal video server 15.
Receiving terminal for digital television 11, (VOD) video on-demand request instruction of the IPTV pattern that the reception user sends, and whether the communication environment that detects the current IP network exists congested, occur when congested in IP network, send the switching server order to media control centre 13, behind the handover success, obtain the frequency point information of the video streaming that returns from media control centre 13, this frequency point information is resolved, receive and play the video flowing through ovennodulation that transmits from digital television signal video server 15; This receiving terminal for digital television belong among satellite dual-mode set-top box, wired dual-mode set-top box or the ground dual mode set-top box three any one or multiple.In the present embodiment, receiving terminal for digital television is wired dual-mode set-top box.
Digital television signal video server 15, the video flowing that receiving media control centre 13 sends is modulated into radiofrequency signal, transmits this RF video by digital TV network and flow to receiving terminal for digital television 11.This digital television signal video server belong among Signals in Satellite Data Stream server, cabled digital signal server or the ground digital signal server three any one or multiple.In the present embodiment, the digital television signal video server is cabled digital signal server.
Wherein be based on being connected of IP network between receiving terminal for digital television 11 and the media server 12.
Wherein all be based on being connected of IP network between media control centre 13 and receiving terminal for digital television 11, media server for subsequent use 14 and the digital television signal video server 15.
Wherein be connected by digital TV network between receiving terminal for digital television 11 and the digital television signal video server 15, this digital TV network belong among satellite digital TV network, Cable Digital TV Network or the ground digital three any one or multiple.
Wherein said video flowing all is the TS stream behind overcompression, coding.
Fig. 2 shows the realization flow of the digital TV video frequency on-demand control method that the embodiment of the invention provides, and details are as follows:
In step S201, receiving terminal for digital television receives the video on-demand request instruction of IPTV pattern, obtains video flowing by IP network from media server, and this video flowing is carried out Play Control.
In step S202, whether receiving terminal for digital television detects IP network and exists congested;
In step S203, congested if IP network exists, then the control figure television receive terminal enters the video request program of digital television broadcasting pattern, otherwise the control figure television receive terminal is proceeded the video request program of IPTV pattern.
As one embodiment of the present of invention, receiving terminal for digital television sends switching controls order notice media control centre switching server, media control centre obtains video flowing from media server for subsequent use after receiving switching command, send this video flowing to the digital television signal video server, realize transmission, the broadcast of video by digital TV broadcasting network.
Fig. 3 shows the detailed realization flow of the digital TV video frequency on-demand control method that the embodiment of the invention provides, and details are as follows:
In step S301, (VOD) video on-demand request instruction of the IPTV pattern that receiving terminal for digital television reception user sends is obtained video flowing by IP network from media server, and this video flowing is carried out Play Control.
As one embodiment of the present of invention, receiving terminal for digital television is set up being connected of IP based network with media server, by the RTSP agreement or adopt independently developed proprietary protocol to carry out session interaction, the transmission of control video flowing is carried out Play Control to the video flowing on the media server.
In step S302, receiving terminal for digital television detect IP network whether exist congested, if exist congested, execution in step S303 then, otherwise continue to carry out video request program by IP network.
In step S303, receiving terminal for digital television sends switching controls order notice media control centre switching server.
As one embodiment of the present of invention, the order of switching server can be adopted the SET_PAREMETER order in the RTSP agreement, also can adopt the order in the independently developed proprietary protocol.
In step S304, the switching server order of media control centre responding digital television receive terminal, and it is made reply includes whether successful information of switching server in this response message.
In step S305, receiving terminal for digital television is resolved the response message that the media control centre receive returns, if the switching server success, execution in step S306 then, otherwise receiving terminal for digital television prompting user network is unavailable, please wait.
In step S306, receiving terminal for digital television sends order and informs that media control centre carries out video frequency program title, time started, the concluding time of program request by IP network, and the time of current program broadcast;
As one embodiment of the present of invention, after receiving terminal for digital television was received the message of this switching server success, the order that sends in SET_PAREMETER order or the independently developed proprietary protocol informed that media control centre by title, time started, concluding time and the media server of the video frequency program of IP network program request the congested information such as time (current reproduction time) occurs
In step S307, media control centre is according to above-mentioned video frequency program title, time started, concluding time, and the time that current program is play is obtained corresponding video flowing from media server for subsequent use.
As one embodiment of the present of invention, the congested information such as time (current reproduction time) occur in title, time started, concluding time and media server that media control centre receives the video frequency program that sends from receiving terminal for digital television, search for the media list of media server for subsequent use, in tabulation, find the video frequency program that to play.This order can be the SET_PAREMETER order in the RTSP agreement, also can adopt the order in the independently developed proprietary protocol.
In step S308, media control centre distributes the transmission frequency to feed the video flowing of capable program request, sends the information such as transmission frequency, modulation system, symbol rate of this video flowing by order to receiving terminal for digital television.
This order can be the SET_PAREMETER order in the RTSP agreement, also can adopt the order in the independently developed proprietary protocol.
In step S309, media control centre will send to from the video flowing that media server for subsequent use obtains the digital television signal video server.In the present embodiment, the digital television signal video server is cabled digital signal server.
In step S310, the digital television signal video server is modulated receiving video flowing, transmit video flowing after this modulation to receiving terminal for digital television by digital TV network, the video flowing of receiving terminal for digital television after to this modulation carries out Play Control.
As one embodiment of the present of invention, the digital television signal video server is modulated receiving video flowing, transmits video flowing after this modulation to receiving terminal for digital television by Cable Digital TV Network; Receiving terminal for digital television parses the transmission frequency of the video flowing after this modulation, by the high-frequency tuning head this frequency is carried out frequency locking, and this video flowing is carried out demodulation, broadcast.
The receiving terminal for digital television that Fig. 4 shows the embodiment of the invention to be provided carries out the realization flow of video request program control, in this realization flow, whether the communication environment that receiving terminal for digital television detects the current IP network exists congested, if exist congested, then send the switching server order, request changes the video flowing of playing by IP network by digital TV network into to be transmitted, if switching server success, then receive by the video flowing after the modulation of digital TV network transmission, and the video flowing after this modulation is carried out Play Control.Details are as follows for its concrete realization flow:
In step S401, receive the video on-demand request instruction of IPTV pattern, obtain video flowing from media server, to this video flowing transmit, Play Control.
As one embodiment of the present of invention, receiving terminal for digital television receives (VOD) video on-demand request instruction of IPTV pattern, for example receive the video request program program start instruction based on the IPTV pattern of user's input, by the RTSP agreement or adopt independently developed privately owned media agreement and media server to carry out session, obtain video flowing from media server, transmission, the broadcast of video flowing are controlled.
In step S402, detect IP network whether exist congested, if exist congested, execution in step S403 then; Otherwise execution in step S409.
As one embodiment of the present of invention, can detect the Loss Rate of current IP network packet, judge whether the current IP network exists congested, for example detect the Loss Rate of packet greater than the Loss Rate of predefined packet, think that then network occurs congested.
In step S403, suspend the broadcast of current program, and record video frequency program title, time started, the concluding time of carrying out program request by IP network, and the time of current program broadcast.
As one embodiment of the present of invention, receiving terminal for digital television is closed and the linking of media server, suspend video decode, and record video frequency program title, time started, the concluding time of carrying out program request by IP network, and the time of current program broadcast, and make the interface of video playback remain into last frame, and point out simultaneously IP network congested, please wait.
In step S404, send the switching controls order, the request switching server.
In step S405, receive the order of returning from media control centre, can judge by this order whether switching server is successful.If the switching server success, execution in step S406, otherwise, execution in step S410.If the switching server failure, media control centre sends response message to receiving terminal for digital television, informs the failure of receiving terminal for digital television switching server, and receiving terminal for digital television prompting user network is unavailable, please wait; If switching server success, media control centre sends response message and informs the success of receiving terminal for digital television switching server, and receiving terminal for digital television receives that the order that sends in SET_PAREMETER order or the independently developed proprietary protocol after this message informs that media control centre by title, time started, concluding time and the media server of the video frequency program of IP network program request the congested information such as time (current reproduction time) occurs
As one embodiment of the present of invention, receiving terminal for digital television sends the switching controls order to media control centre, requires media control centre to obtain video flowing from media server for subsequent use, is transferred to the digital television signal video server.This switching controls order can be the SET_PAREMETER order in the RTSP agreement, also can adopt the order in the independently developed proprietary protocol.
In step S406, send a command to media control centre, this order comprises by the title of the video frequency program of IP network program request, time started, concluding time and the congested information such as time of media server generation.
In step S407, receive transmission frequency and the frequency locking of the video flowing that carries out program request;
As one embodiment of the present of invention, the order that receiving terminal for digital television receiving media control centre returns, the information such as transmission frequency of the video flowing that carries out program request are carried in this order, therefrom parse the information such as transmission frequency, modulation system, symbol rate of this video flowing, trigger the high-frequency tuning head this frequency is carried out frequency locking.
In step S408, receive from the digital television signal of digital TV network transmission and carry out demodulation, displaying video.
In step S409, continue by the IP network transmitting video-frequency flow.
In step S410, notify the user, network is unavailable, please wait.
Fig. 5 shows the structure of the receiving terminal for digital television that the embodiment of the invention provides, and for convenience of explanation, only shows the relevant part of the embodiment of the invention.Wherein, video request program control device 51 can be the software unit that is built in receiving terminal for digital television, the unit of hardware cell or soft or hard combination.
IPTV video request program unit 52 is according to the IPTV VOD service request that receives, by transmission, reception and the broadcast of media protocol control video flowing.
Whether the communication environment that IP network detecting unit 53 detects the current IP network exists congested.
Video request program pattern switch control unit 54 is used for when receiving the network congestion signal that IP network detecting unit 53 sends, record the video frequency program title of carrying out program request by IP network by programme information record cell 541, time started, concluding time, and the time of current program broadcast, send again the switching server order, request changes the video flowing of playing by IP network by digital TV network into to be transmitted, if switching server success, then the control figure television receive terminal receives by the video flowing after the modulation of digital TV network transmission, and the video flowing after this modulation is carried out Play Control.
As one embodiment of the present of invention, when video request program pattern switch control unit 54 is received the network congestion signal that IP network detecting unit 53 sends, record video frequency program title, time started, the concluding time of carrying out program request by IP network by programme information record cell 541, and the time of current program broadcast, send again the switching server order to media control centre request switching server; Receiving media control centre is replied, if the switching server success sends order and notifies the title of media control centre by the video frequency program of IP network program request, time started, concluding time and media server that the congested information such as time occur; The information such as transmission frequency of the video flowing that carries out program request are carried in the order that receiving media control centre returns, this order, therefrom parse the information such as transmission frequency, modulation system, symbol rate of this video flowing, trigger the high-frequency tuning head this frequency is carried out frequency locking; Reception is carried out demodulation from the modulated video flowing of digital TV network transmission, and the video flowing after this modulation is carried out Play Control.
In embodiments of the present invention, when carrying out video request program by IP network, whether carry out video request program by the IPTV pattern according to the automatic control figure television receive terminal of the communication environment of the current IP network that detects, if it is congested that network occurs, then the video flowing that originally transmits by IP network is sent to the digital television signal video server, transfer to receiving terminal for digital television by digital TV network, realize the broadcast of video, take full advantage of the superiority bandwidth of CHINA RFTCOM Co Ltd, solve the problem of present IP network bandwidth deficiency, guaranteed the fluency of video program play.In addition, do not need to increase any hardware cost, IP network and digital TV network are combined, promoted the fusion of three nets.
One of ordinary skill in the art will appreciate that, realize that all or part of step in above-described embodiment method is to come the relevant hardware of instruction to finish by program, described program can be stored in the computer read/write memory medium, described storage medium is such as ROM/RAM, disk, CD etc.
The above only is preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a digital TV video frequency on-demand control method is characterized in that, described method comprises the steps:
It is congested whether the communication environment of judging the current IP network occurs, and is that then the control figure television receive terminal switches to video playback by the digital television broadcasting pattern of digital TV network transmitting video-frequency flow from the video request program of IPTV pattern; Otherwise the control figure television receive terminal is proceeded the video request program of IPTV pattern; Specifically comprise:
If it is congested that IP network occurs, then receiving terminal for digital television sends the switching server order to media control centre, notice media control centre switching server;
Media control centre receives the switching server order from receiving terminal for digital television, obtains the video flowing that carries out program request from media server for subsequent use;
After media control centre gets access to the video flowing that carries out program request, distribute frequency to it, and send this frequency point information to receiving terminal for digital television;
Media control centre will be sent to the digital television signal video server from the video flowing that carries out program request that media server for subsequent use obtains;
The digital television signal video server is modulated receiving video flowing, transmits video flowing after this modulation to receiving terminal for digital television by digital TV network;
Receiving terminal for digital television is resolved described frequency point information and this frequency is carried out frequency locking, and the video flowing that the receiving digital television signal video server sends is also play.
2. the method for claim 1 is characterized in that, and is congested if described IP network occurs, and then receiving terminal for digital television sends the switching server order to media control centre, and the step of notice media control centre switching server also comprises:
Receiving terminal for digital television suspends the broadcast of current program, and records video frequency program title, time started, the concluding time of carrying out program request by IP network, and the time of current program broadcast.
3. method as claimed in claim 2 is characterized in that, described media control centre receives the switching server order from receiving terminal for digital television, and the step of obtaining the video flowing that carries out program request from media server for subsequent use is specially:
The switching server order of media control centre responding digital television receive terminal, and it is made reply;
If replying that receiving terminal for digital television receives represents the switching server success, then send order and inform that media control centre carries out video frequency program title, time started, the concluding time of program request by IP network, and the time of current program broadcast;
Media control centre is according to above-mentioned video frequency program title, time started, concluding time, and the time that current program is play is obtained corresponding video flowing from media server for subsequent use.
4. a receiving terminal for digital television comprises IPTV video request program unit, is used for receiving the video on-demand request instruction of IPTV pattern, and receiver, video stream is play this video, it is characterized in that, also comprises:
Whether the IP network detecting unit exists congested for detection of the communication environment of current IP network;
Video request program pattern switch control unit, be used for when receiving the network congestion signal that the IP network detecting unit sends, send the switching server order, request changes the video flowing of playing by IP network by digital TV network into to be transmitted, if switching server success, the receiving media control centre frequency point information of distributing then, and after the video flowing that carries out program request that media control centre will obtain from media server for subsequent use is sent to the digital television signal video server, the control figure television receive terminal receives by the video flowing after the modulation of digital TV network transmission, and the video flowing after this modulation is carried out Play Control.
5. receiving terminal for digital television as claimed in claim 4, it is characterized in that, described video request program pattern switch control unit also comprises the programme information record cell, be used for when receiving the network congestion signal that the IP network detecting unit sends, record carries out video frequency program title, time started, the concluding time of program request by IP network, and the time of current program broadcast.
6. receiving terminal for digital television as claimed in claim 4 is characterized in that, described receiving terminal for digital television belong among satellite dual-mode set-top box, wired dual-mode set-top box or the ground dual mode set-top box three any one or multiple.
7. a digital TV video frequency program request control system is characterized in that, described system comprises receiving terminal for digital television as claimed in claim 4, and described system also comprises:
Media server, media control centre, media server for subsequent use and digital television signal video server; Wherein be based on being connected of IP network between receiving terminal for digital television and the media server, all be based on being connected of IP network between media control centre and receiving terminal for digital television, media server for subsequent use and the digital television signal video server, be connected by digital TV network between receiving terminal for digital television and the digital television signal video server;
Described receiving terminal for digital television, be used for to receive the video on-demand request instruction of the IPTV pattern that the user sends, and whether the communication environment that detects the current IP network exists congested, then to send the switching server order to media control centre, behind the handover success, receive and play the video flowing from the digital television signal video server; Otherwise continue reception and broadcast from the video flowing of media server;
Described media server is used for depositing the video flowing that carries out video request program, and the order request of responding digital television receive terminal sends video flowing to receiving terminal for digital television;
Described media control centre, be used for receiving the switching server order from receiving terminal for digital television, obtain the video flowing that carries out program request from media server for subsequent use, distribute the frequency point information of this video flowing of transmission to receiving terminal for digital television, and send this video flowing to the digital television signal video server;
Described media server for subsequent use is used for depositing the video flowing that carries out video request program;
Described digital television signal video server is used for receiving media control centre from the video flowing that media server for subsequent use obtains, and is modulated into radiofrequency signal, is transferred to receiving terminal for digital television by digital TV network.
8. digital TV video frequency program request control system as claimed in claim 7, it is characterized in that, described receiving terminal for digital television also is used for existing when congested when the communication environment that detects the current IP network, record carries out video frequency program title, time started, the concluding time of program request by IP network, and the time of current program broadcast.
9. digital TV video frequency program request control system as claimed in claim 8 is characterized in that, the switching server order of described media control centre responding digital television receive terminal, and it is made reply;
If replying that receiving terminal for digital television receives represents the switching server success, then send order and inform that media control centre carries out video frequency program title, time started, the concluding time of program request by IP network, and the time of current program broadcast;
Media control centre is according to above-mentioned video frequency program title, time started, concluding time, and the time that current program is play is obtained corresponding video flowing from media server for subsequent use.
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| CN2008101418688A CN101355689B (en) | 2008-09-08 | 2008-09-08 | Method and system for controlling VOD of digital television as well as digital television receive terminal |
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| CN2008101418688A CN101355689B (en) | 2008-09-08 | 2008-09-08 | Method and system for controlling VOD of digital television as well as digital television receive terminal |
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| CN106789317A (en) * | 2016-12-30 | 2017-05-31 | 广州市保伦电子有限公司 | A kind of server switching method and its device |
| CN108282417A (en) * | 2017-12-15 | 2018-07-13 | 北京歌华有线电视网络股份有限公司 | CHINA RFTCOM Co Ltd method for managing resource, device and broadcasting and TV VOD method, system |
| CN111918138A (en) * | 2020-07-20 | 2020-11-10 | 桂林长海发展有限责任公司 | Ship dual-link-based video on demand method and system |
| CN115474067B (en) * | 2022-07-28 | 2023-11-10 | 北京歌华有线电视网络股份有限公司 | Method, storage medium and system for switching and playing live programs of digital television |
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