CN101505408B - Remote video accessing system and method - Google Patents
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- CN101505408B CN101505408B CN2009101057063A CN200910105706A CN101505408B CN 101505408 B CN101505408 B CN 101505408B CN 2009101057063 A CN2009101057063 A CN 2009101057063A CN 200910105706 A CN200910105706 A CN 200910105706A CN 101505408 B CN101505408 B CN 101505408B
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Abstract
The invention provides a remote video access system and a method. The system comprises a home digital television program signal source device, a wireless network, a video processing device and a mobile terminal, wherein the video processing device comprises a program signal receiver, a video coder, a streaming media server and a video transmitter; the video processing device receives a mobile terminal access request from a mobile network, establishes a wireless connection with the mobile terminal, and acquires television program information source information which is compressed and encoded and then sent to the mobile terminal by the streaming media server and the video transmitter through the mobile network; and when the mobile terminal selects a preview mode, the video processing device acquires multi-path television program signal resource information, and displays a multi-path television program on the mobile terminal. By using the system and the method, the home digital television programs can be received anytime and anywhere through the mobile terminal.
Description
Technical field
The present invention relates to the mobile TV technology, specifically refer to a kind of system and method for realizing remote video accessing by portable terminal.
Background technology
Fast development along with wireless communication technology, Voice ﹠ Video coding techniques and large scale integrated circuit technology, the user no longer is satisfied with and is confined to the fixed terminal TV reception, but hope can be in the process that moves freely, the use of watching the program mobile terminal television service of oneself liking whenever and wherever possible is commonplace, and the called mobile terminal television services is meant the service by watching television programs by mobile terminal.
At present, the development of broadcast technology has realized TV programme being sent on the portable terminal in the mode of broadcasting by television network broadcast, realizes that no matter the user is outdoor, local strange land, all can watch TV programme indoors.
Though by broadcast mode its above-mentioned advantage is arranged, have following shortcoming simultaneously: at first, send TV programme by broadcast mode, though can encrypt, key can only send in the mode of mass-sending, and can't directive sending; Therefore, even only there is a user to select to watch a certain programs, television network broadcast also must be provided key by all user terminals in the overlay area, cause the waste of the unnecessary system resource and the network bandwidth, also brought key to crack the increase of probability, be unfavorable for guaranteeing the service security of operator, also be unfavorable for user's qualification is effectively authenticated; Secondly, when sending TV programme by broadcast mode, television network broadcast has no way of learning whether terminal receives this TV programme, in order to guarantee successfully to receive, can only send continuously, the huge load and the waste of system have been brought, in addition, sending TV programme by broadcast mode is unidirectional transmission, and the user can't feed back, therefore can only passively accept, and can not realize initiatively participating in.
Outside television network broadcast, also realized at present sending the technology of TV programme in the mobile communications network: by the SP/CP source of programming, perhaps obtain program source, send to portable terminal by the mobile network from television network broadcast to terminal.
This mode can realize the directive sending program and carry out user interactions, but have following shortcoming simultaneously also: the first, and the bandwidth deficiency that mobile communications network provided is so user's the effect of watching can't be guaranteed; The second, the network bandwidth of SP/CP and server resource are subjected to the number of users quantitative limitation, and therefore, if the user who watches simultaneously is more or suffer network congestion, then user's the effect of watching can't be guaranteed.
Summary of the invention
Technical problem solved by the invention is to provide a kind of remote video accessing system, realizes remote video accessing by portable terminal, specifically is the system and method for watching the family digital TV programme signal by mobile phone.
For solving the problems of the technologies described above, the invention provides a kind of remote video accessing system, this system comprises a point-to-point long-range system of watching the family digital TV that is made up of family digital TV programme signal source apparatus, wireless network, video process apparatus and portable terminal, and video process apparatus comprises: programme signal receiving system, video coding apparatus, streaming media server, video transmission device; Video process apparatus is accepted the mobile terminal accessing request from the mobile network, and set up wireless connections with portable terminal, video process apparatus is gathered TV programme signal source information to family digital TV programme signal source apparatus, after the compressed encoding processing, through streaming media server, video transmission device sends on the portable terminal by the mobile network, when portable terminal is selected preview mode, video process apparatus is gathered the multi-channel tv programs signal source information, and multi-channel tv programs is simultaneously displayed on the portable terminal, the form of Xian Shiing is that the wicket stack shows for the previewing program of selecting at first for main window overall background screen shows the previewing program of selecting later that reaches simultaneously, streaming media server writes down the display window type under each program automatically, show cumulative time and display frequency, streaming media server is according to the user preferences Automatic Optimal later on, at first, under the identical situation of main window display frequency, show at main window according to previewing program in main window demonstration cumulative time length according to showing at main window at the many previewing programs of main window display frequency.
Preferably, portable terminal is when mobile network's a base station enters into another base station, portable terminal will send the base station to streaming media server and change information, streaming media server sends information to portable terminal after receiving base station replacing information, the switching of prompting base station has switched to the outskirt net from home network, and whether prompting interrupts the wireless connections between portable terminal and video process apparatus.
Comprise also in the video process apparatus that sends a data feedback demo plant, when video transmission device continues to send the video stream data package informatin to portable terminal, carry out interim feedback information checking, the process of the information of transmission is divided into a plurality of time slices automatically, when each time slice finishes, automatically generate one and send the data statistics bag, comprise in this statistical packages that the data packet byte that the current time fragment has sent counts S, and send one to terminal and accept the data feedback command, accept the data feedback that portable terminal is sent, the data packet byte that this data feedback packet portable terminal is accepted is counted C, sending data feedback demo plant analyzes the difference Q that S deducts C, if Q is less than the scope that is provided with, checking is passed through, continue the transmission of next fragment data, if Q is greater than the scope of not putting, carry out a secondary data and send exception record, if do not receive byte number C, then suspend the transmission of next fragment data, restore data sends when receiving byte number C, do not receive byte number C if surpass certain hour, then stop the notebook data process of transmitting.
Also comprise data packet number S1 and each package number that the current time fragment has sent in the described statistical packages, also comprise data packet number C1 and each package number that current time fragment that portable terminal receives has sent in the feedback packet of portable terminal, send data feedback demo plant with the difference Q1 that S1 deducts C1, reach unreceived package number sequence table and record in the unusual transmission data record.
Also comprise the normally package number sequence table of decompress(ion) broadcast in the feedback packet of described portable terminal, data feedback demo plant records the package number sequence table in the unusual transmission data record.
Beneficial effect of the present invention is, uses the present invention, can watch the family digital TV programme anywhere or anytime by portable terminal.
Description of drawings
Fig. 1 is a system applies schematic diagram of the present invention;
Fig. 2 is the structural representation of video process apparatus of the present invention;
Fig. 3 is the implementing procedure figure of the inventive method.
Embodiment
Illustrate that below in conjunction with accompanying drawing the present invention specifically implements.
Fig. 1 shows the overall structure of the system of the embodiment of the invention.Please refer to Fig. 1, left part is the transmitting terminal of system, and the right side part is the receiving terminal of system, between transmitting terminal and the receiving terminal by mobile communications network communication.The TV programme signal that transmitting terminal is responsible for comprising voice and image coded data is broadcast to communication.Native system comprises the point-to-point long-range system of watching the family digital TV that family digital TV programme signal source apparatus 10, wireless network 11, video process apparatus 12, portable terminal 13 are formed.Please refer to shown in Figure 2ly, wherein video process apparatus 12 comprises: programme signal receiving system 121, video coding apparatus 122, streaming media server 123, video transmission device 124, portable terminal identification demo plant 125 and feedback demo plant 126.
Transmitting terminal is made up of wireless network 11, video process apparatus 12, family digital TV programme signal source apparatus 10, wherein the wireless communication protocol of wireless network 11 comprises IEEEE802.11 series, HomeRF, HiperLAN, WiFi, WLAN, WAP, GPRS, CDMA, 3G, NGN etc., and wireless network 11 comprises that also radio network controller (RNC) is connected to switching network.
Family digital TV programme signal source apparatus 10 receives the digital television signal of radio and television operator issue, family digital TV programme signal source apparatus 10 is a digital TV set-top box in the present embodiment, receive the digital television signal of radio and television operator issue by coaxial line, also can be other TV signal such as Internet video, DVD digital video, multimedia music and picture etc. one or more.Digital television program signal source device 13 links to each other with video process apparatus 12, and voice, view data are inputed to video process apparatus 12.
During work, at first portable terminal 13 sends access request by mobile communications network to video process apparatus 12, the identification demo plant 125 of video process apparatus 12, when receiving portable terminal 13 access instructions, extract portable terminal 13 personal identity numbers, and compare with registration conditions in the video process apparatus 12, the whether corresponding registration of the customer identification number of corresponding relatively video process apparatus 12 and the personal identity number of portable terminal 13, as relatively passing through, just allow the portable terminal login, otherwise the refusal login; After portable terminal 13 logins, video process apparatus 12 will extract digital television program source information to family digital TV programme signal source apparatus 10, the voice that digital television program signal source device 10 transmits, view data is received by the programme signal receiving system 121 of video process apparatus 12, programme signal receiving system 121 is connected to video coding apparatus 122, video coding apparatus is used for 122 pairs of voice, view data is carried out compressed encoding, be resent to streaming media server 122, streaming media server 122 is used for doing RRM, the information of the portable terminal 13 of management transmission access request comprises the personal identity number of portable terminal 13, and seek when sending and send the address and send the transmission request to portable terminal 13, to the voice behind the compressed encoding, view data is done resource management, control transfer rate etc., video transmission device 124 is with the voice behind the compressed encoding, view data is sent to wireless network 11, the radio network controller of wireless network 11 (RNC) is connected to switching network, be sent to mobile communications network again, be sent to portable terminal 13 by mobile communications network again, the client software of native system is installed on the portable terminal 13, receive the voice behind the above-mentioned compressed encoding, after the view data, carry out data decompression, program is presented on portable terminal 13 screens plays, when portable terminal 13 is selected preview mode, video process apparatus 12 is gathered the multi-channel tv programs signal source information, and multi-channel tv programs is simultaneously displayed on the portable terminal 13, present embodiment can select 2 the tunnel, 3 the tunnel or 4 the tunnel, select 2, in the time of 3 or 4 the tunnel, the form of Xian Shiing is that the wicket stack shows for the previewing program of selecting at first for main window overall background screen shows the previewing program of selecting later that reaches simultaneously, streaming media server all will write down the demonstration number of times of the display window type under each program at every turn automatically, show cumulative time and display frequency, later on according to the user preferences Automatic Optimal.Below illustrate the display window type how streaming media server regulates previewing program according to user preferences, for example the program first was 5 (showing that program first 5 is as first selection) at the number of times of main window demonstration, the number of times that program second main window shows is 10 times (show program second 10 times select as first), then when selecting the program first to select program second to carry out preview more earlier next time, because the number of times that program second main window shows more than the program first, then is placed on main window to program second automatically and shows; When and for example the number of times that shows at main window of program third and fourth is the same all is 6, the preview duration of program third reaches 2 hours, the preview duration of program fourth reaches 6 hours, then when selecting program third next time earlier and selecting the program fourth again, because the preview that program fourth main window shows accumulative total duration then is shown in main window with the program fourth automatically greater than program the third; Also can be set in program that preview appears in wicket reach or necessarily add up duration (for example program penta in the accumulative total preview of wicket for up to by 10 hours) or display frequency and reach some (for example, program penta reaches 30 times in the accumulative total preview number of times of wicket) after automatically it is shown at main window during preview next time.
Described portable terminal 13 is when mobile network's a base station enters into another base station, for example, when portable terminal 13 enters into outskirt base station B from local area base station A, if video process apparatus 12 continues to keep being connected and the transmission tone video data with portable terminal 13, then will produce wandering fee, portable terminal 13 will send base station replacing information to streaming media server 123 this moment, streaming media server 123 receives after the base station replacing information and sends informations to portable terminal 13, and whether prompting interrupts the wireless connections of 12 of portable terminal 13 and video process apparatus.
Described feedback demo plant 126, when the voice of video transmission device 124 after portable terminal 13 continues to send compressed encoding, during the view data package informatin, carry out interim feedback information checking, the process of the information of transmission is divided into a plurality of time slice t1 automatically, t2, t3 ... when each time slice (for example in the t1 period) finishes, automatically generate one and send the data statistics bag, comprise in this statistical packages that the data packet byte that current time fragment (for example in the t1 period) has sent counts S, and send one to portable terminal 13 and accept the data feedback command, accept the data feedback that portable terminal is sent, the data packet byte that this data feedback packet feedback portable terminal 13 was accepted in the t1 period is counted C, the feedback demo plant is analyzed the difference Q that S deducts C, if Q is less than or equal to the threshold range of setting, checking is passed through, continue the transmission of next fragment (for example continuing to send the t2 fragment) data, if Q is greater than the scope that is provided with, carry out a secondary data and send exception record, if do not receive byte number C, then suspend the transmission of next fragment data, restore data sends when receiving byte number C, do not receive byte number C if surpass certain hour, then stop the notebook data process of transmitting, in the present embodiment, the statistical packages S that for example supposes the t1 period is 200 bytes, feedback packet C is 100 bytes, difference Q is 100 bytes, threshold range is 100, because Q equals, then checking is passed through, and continues to send the data of t2 period.
Further improvement to above-mentioned statistical packages, statistical packages also comprises data packet number S1 and each package number that the current time fragment has sent, also comprise data packet number C1 and each package number that current time fragment that portable terminal receives has sent in the feedback packet of portable terminal, send the difference Q1 that data feedback demo plant deducts S1 C1, and unreceived package number sequence table records in the unusual transmission data record, also comprise the normally package number sequence table of decompress(ion) broadcast in the feedback packet of described portable terminal 13, data feedback demo plant records the package number sequence table in the unusual transmission data record.
Fig. 3 is the schematic flow sheet of remote video accessing method of the present invention.A kind of access method of remote video system comprises the steps:
The S101 portable terminal sends the visit connection request to video process apparatus;
S102 video process apparatus portable terminal is verified, checking be by advancing next step, and checking is by sending the refusal login prompt to portable terminal, and stop the login process of portable terminal;
After S103 portable terminal and video process apparatus connect, video process apparatus and digital television program source connect, extract digital television program source information, and carry out transcoding, be converted to the data format that this system can discern processing, extract the listing in the Digital Television, comprise program code and title in this listing, will send to portable terminal after the data compression;
The decompression device that native system is arranged on the S104 portable terminal receives in the above-mentioned Digital Television after the listing data, carries out data decompression, and listing is presented on the mobile terminal screen;
S105 user selects the program that will play from listing, perhaps the user selects a plurality of TV programme to enter preview mode from listing, video process apparatus is gathered the multi-channel tv programs signal source information, and multi-channel tv programs is simultaneously displayed on the portable terminal, the form of Xian Shiing is that the wicket stack shows that the user selects the TV programme that will play again for the previewing program of selecting at first for main window overall background screen shows the previewing program of selecting later that reaches simultaneously;
S106 moves program code is sent to video process apparatus, after Video processing received program code and title, the digital television program corresponding with this numbering connected, and extracted the digital television program content, and carry out transcoding, will send to portable terminal after the data compression;
The S107 portable terminal will receive above-mentioned digital television program content and carry out data decompression, and programme content is play on mobile terminal screen;
The S108 portable terminal can send program at any time and adjust control command in broadcast program content process, sends to video process apparatus, and video process apparatus carries out respective handling after receiving program adjustment control command.
Above-mentioned steps S105 streaming media server all will write down demonstration number of times, demonstration cumulative time and the display frequency of the display window type under each program at every turn automatically, later on according to the user preferences Automatic Optimal.
Digital television program described in the said method is numbered the digital TV channel sequence number, for example the television channel sequence number is 01, television channel name is the digital TV channel title, for example name is called " CCTV1 ", when portable terminal is connected first with video process apparatus, video process apparatus generates a Parameter File with digital TV channel program numbering and title, and the time on recent renewal date of indicating this Parameter File, and this Parameter File sent to portable terminal, portable terminal is accepted the back and is preserved, need to change the digital TV channel content in portable terminal login later on or the broadcast program process, can from the Parameter File that portable terminal is preserved, directly extract new channel number and send to video process apparatus.
Digital television program described in the said method is numbered digital television on-demand program sequence number, for example requesting the program sequence number from a TV station is 001, television program names is called the digital television on-demand programm name, for example request programm name from a TV station and be " children world ", when portable terminal is connected first with the request program system, video process apparatus generates a Parameter File with digital television on-demand program code and title, and the time on recent renewal date of indicating this Parameter File, and this Parameter File sent to portable terminal, portable terminal is accepted the back and is preserved, need to change the digital television on-demand programm name in portable terminal login later on or the broadcast program process, can from the Parameter File that portable terminal is preserved, directly extract new request program numbering and send to video process apparatus.
At video process apparatus at every turn with after the digital television program source is connected, extract television channel sequence number and television channel name, or extract video on demand program sequence number and request programm name from a TV station, and with the Parameter File preserved relatively, if content difference, then generate new Parameter File and replace original Parameter File, behind the portable terminal login video process apparatus, extract the nearest replacing time on date of video process apparatus Parameter File, and with portable terminal in time on date of the Parameter File preserved compare, if time on date content difference is then downloaded new Parameter File from video process apparatus and is replaced original Parameter File.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done 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 (4)
1. remote video accessing system, it is characterized in that, this system comprises a point-to-point long-range system of watching the family digital TV that is made up of family digital TV programme signal source apparatus, wireless network, video process apparatus and portable terminal, and video process apparatus comprises: programme signal receiving system, video coding apparatus, streaming media server, video transmission device; Video process apparatus is accepted the mobile terminal accessing request from the mobile network, and set up wireless connections with portable terminal, video process apparatus is gathered TV programme signal source information to family digital TV programme signal source apparatus, after the compressed encoding processing, through streaming media server, video transmission device sends on the portable terminal by the mobile network, when portable terminal is selected preview mode, video process apparatus is gathered the multi-channel tv programs signal source information, and multi-channel tv programs is simultaneously displayed on the portable terminal, the form of Xian Shiing is that the wicket stack shows for the previewing program of selecting at first shields the previewing program that shows and select later for the main window overall background simultaneously, streaming media server writes down the display window type under each program automatically, show cumulative time and display frequency, streaming media server is according to the user preferences Automatic Optimal later on, at first, under the identical situation of main window display frequency, show at main window according to previewing program in main window demonstration cumulative time length according to showing at main window at the many previewing programs of main window display frequency;
Comprise also in the video process apparatus that sends a data feedback demo plant, when video transmission device continues to send the video stream data package informatin to portable terminal, carry out interim feedback information checking, the process of the information of transmission is divided into a plurality of time slices automatically, when each time slice finishes, automatically generate one and send the data statistics bag, comprise in this statistical packages that the data packet byte that the current time fragment has sent counts S, and send one to terminal and accept the data feedback command, accept the data feedback that portable terminal is sent, the data packet byte that this data feedback packet portable terminal is accepted is counted C, sending data feedback demo plant analyzes the difference Q that S deducts C, if Q is less than or equal to the scope of setting, checking is passed through, continue the transmission of next time slice data, if Q is greater than the threshold range that is provided with, carry out a secondary data and send exception record, if do not receive byte number C, then suspend the transmission of next time slice data, restore data sends when receiving byte number C, do not receive byte number C if surpass certain hour, then stop the notebook data process of transmitting.
2. remote video accessing system as claimed in claim 1, it is characterized in that described portable terminal is when mobile network's a base station enters into another base station, portable terminal will send the base station to streaming media server and change information, streaming media server sends information to portable terminal after receiving base station replacing information, the switching of prompting base station has switched to the outskirt net from home network, and whether prompting interrupts the wireless connections between portable terminal and video process apparatus.
3. remote video accessing system as claimed in claim 1, it is characterized in that the data packet number S1 and each package number that comprise also in the described statistical packages that the current time fragment has sent, also comprise data packet number C1 and each package number that current time fragment that portable terminal receives has sent in the feedback packet of portable terminal, send data feedback demo plant with the difference Q1 that S1 deducts C1, reach unreceived package number sequence table and record in the unusual transmission data record.
4. remote video accessing system as claimed in claim 3, it is characterized in that also comprising in the feedback packet of described portable terminal the package number sequence table that normal decompress(ion) is play, data feedback demo plant records the package number sequence table in the unusual transmission data record.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101057063A CN101505408B (en) | 2009-03-06 | 2009-03-06 | Remote video accessing system and method |
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|---|---|---|---|
| CN2009101057063A CN101505408B (en) | 2009-03-06 | 2009-03-06 | Remote video accessing system and method |
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| CN101505408A CN101505408A (en) | 2009-08-12 |
| CN101505408B true CN101505408B (en) | 2011-04-20 |
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| CN2009101057063A Expired - Fee Related CN101505408B (en) | 2009-03-06 | 2009-03-06 | Remote video accessing system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102378060A (en) * | 2010-08-27 | 2012-03-14 | 乐金电子(中国)研究开发中心有限公司 | Method, device and system for browsing audio-video programs |
| CN102469358A (en) * | 2010-11-16 | 2012-05-23 | 北京中电华大电子设计有限责任公司 | WLAN (Wireless Local Area Network) terminal as well as CMMB (China Mobile Multimedia Broadcasting)/WLAN terminal cooperation method and system |
| CN102480641A (en) * | 2010-11-25 | 2012-05-30 | 中兴通讯股份有限公司 | Method and device for realizing mobile phone TV program preview |
| CN102547432B (en) * | 2010-12-16 | 2015-07-29 | 中国移动通信集团广东有限公司 | Information processing system, method for processing multimedia information and system |
| JP5695972B2 (en) * | 2011-05-20 | 2015-04-08 | 日立マクセル株式会社 | Content receiver and content information output method |
| CN102263783A (en) * | 2011-06-14 | 2011-11-30 | 上海聚力传媒技术有限公司 | Method and device for transmitting media files based on time slices |
| CN102307195B (en) * | 2011-08-23 | 2018-10-12 | 南京中兴新软件有限责任公司 | Channel carousel method based on Streaming Media and streaming media server |
| EP2756672A4 (en) * | 2011-09-12 | 2015-07-15 | Intel Corp | Personalized video content consumption using shared video device and personal device |
| CN102387414A (en) * | 2011-12-01 | 2012-03-21 | 北京广电天地科技有限公司 | Video signal process method and domestic video gateway |
| CN102421033A (en) * | 2011-12-12 | 2012-04-18 | 四川长虹电器股份有限公司 | Method for sharing television program on mobile terminal |
| CN102523510A (en) * | 2011-12-24 | 2012-06-27 | 深圳市同洲电子股份有限公司 | Multiscreen interaction method and apparatus thereof, and digital television all-in-one machine |
| US10015557B2 (en) | 2011-12-31 | 2018-07-03 | Intel Corporation | Content-based control system |
| CN102710985B (en) * | 2012-01-17 | 2016-03-30 | 晨星软件研发(深圳)有限公司 | Realize TV in family lan and move the method for screen, system and television equipment |
| CN103780656B (en) * | 2012-10-25 | 2017-12-15 | 上海宝信软件股份有限公司 | One kind can configure reusable mobile monitoring system based on configuration |
| CN103019555B (en) | 2012-11-19 | 2016-06-01 | 中兴通讯股份有限公司 | The digital media content that transfer is play cuts back method, Apparatus and system |
| CN103079091B (en) * | 2013-02-01 | 2016-12-28 | 清华大学 | Streaming Media method for previewing and device |
| CN104219470B (en) * | 2013-05-30 | 2018-08-17 | 深圳清华大学研究院 | Digital television receiving apparatus and DTV play method |
| CN104469248A (en) * | 2013-09-13 | 2015-03-25 | 腾讯科技（深圳）有限公司 | Video session method and device, server and terminal |
| CN103747348B (en) * | 2014-01-07 | 2017-12-19 | 惠州Tcl移动通信有限公司 | The switching method of mobile terminal, set top box and TV programme |
| CN105872736A (en) * | 2016-04-25 | 2016-08-17 | 乐视控股（北京）有限公司 | Method and device for resource sharing of television |
| CN106559689B (en) * | 2016-11-28 | 2020-02-18 | 盐城晓瑞数字媒体有限公司 | Program playing device, mobile terminal and method |
| CN106685763B (en) * | 2016-12-30 | 2019-11-12 | 中广热点云科技有限公司 | Application platform that is a kind of while supporting public network transmission and private network transmission |
| CN110401857B (en) * | 2019-05-15 | 2021-10-12 | 深圳市鑫鸿视联科技发展有限公司 | Digital television channel broadcasting system and method based on cloud talkback access control system |
| CN112750296A (en) * | 2020-12-18 | 2021-05-04 | 平湖市通用电气安装有限公司 | Intelligent fusion terminal based on infrared signal transmission function |
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2009
- 2009-03-06 CN CN2009101057063A patent/CN101505408B/en not_active Expired - Fee Related
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