CN103248939A - Method and system for achieving synchronous display of multiple screens - Google Patents
Method and system for achieving synchronous display of multiple screens Download PDFInfo
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- CN103248939A CN103248939A CN2012100238557A CN201210023855A CN103248939A CN 103248939 A CN103248939 A CN 103248939A CN 2012100238557 A CN2012100238557 A CN 2012100238557A CN 201210023855 A CN201210023855 A CN 201210023855A CN 103248939 A CN103248939 A CN 103248939A
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000001360 synchronised effect Effects 0.000 title abstract description 10
- 230000005540 biological transmission Effects 0.000 claims abstract description 13
- 238000012545 processing Methods 0.000 claims description 12
- 238000005516 engineering process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 241001269238 Data Species 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
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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
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/4104—Peripherals receiving signals from specially adapted client devices
- H04N21/4122—Peripherals receiving signals from specially adapted client devices additional display device, e.g. video projector
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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
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/414—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance
- H04N21/41407—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance embedded in a portable device, e.g. video client on a mobile phone, PDA, laptop
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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
- H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
- H04N21/4307—Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen
- H04N21/43076—Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen of the same content streams on multiple devices, e.g. when family members are watching the same movie on different devices
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- General Engineering & Computer Science (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Information Transfer Between Computers (AREA)
Abstract
The invention provides a method and system for achieving synchronous display of multiple screens. The method comprises the steps as follows: A, a source screen plays a video file, obtains screen image data and sends the screen image data to a target screen for synchronous play; B, the source screen sends address information of the played video file and current playing progress information of the video file to the target screen in real time; and C, the target screen reads data of the video file according to the address information and plays the data in a corresponding position of the current playing progress information. The invention further provides a system for synchronous display on the multiple screens. The video file is downloaded according to the source of the video file while a transmission screen image is played, so that sharing and secondary synchronization of the multiple screens can be achieved, seamless joint of playing screen shot and the playing video file is achieved, and accordingly, video synchronous, clear and smooth playing from a small screen device to a large screen device is achieved.
Description
Technical field
The present invention relates to information transmission technology field, particularly a kind of method and system that realize that multi-screen shows synchronously.
Background technology
" integration of three networks " named " unification of three nets " again, refer to the interpenetrating of telecommunications network, cable television network and computer communication network, compatible, and progressively integrate and become the unified communication network in the whole world, multiple services such as voice, data and radio and television can be provided for the user.
Fast development along with mobile Internet, multi-screen merges the development trend that becomes current terminal, can support whenever and wherever possible that various terminals visit the video content of a certain terminal, thereby can between television set, computer, mobile phone, panel computer, realize sharing of video content, for example, share photo, video, recreation and interaction managing and control etc., the video content of intelligent terminals such as iPhone, ipad is synchronized on the television set, can be user-friendly.
The user can upload onto the server multimedia file or provides the multimedia file address to target side by agreements such as HTTP, FTP, target side is watched multimedia file by using the browser Website login, but this mode has increased the complexity of file transfer and the pressure of the network bandwidth.Perhaps can carry out video by the mode of video session, video conference and share, but the mode of video session, video conference can only be transmitted small documents usually.Perhaps can pass through the mutual multimedia file of Email attachment, but this sharing mode necessarily requires calling and called to participate in simultaneously just can finishing, and video playback is disposable.
In addition, also can the picture of intercepting and capturing directly be sent to target side by in progress video file is intercepted video file according to certain frequency, target side is play-overed after receiving screenshotss then.If but this mode is with devices with small screens sharing to the large-screen device, the resolution of the screenshotss information of transmitting and definition are all very low, and all pictorial informations of transmission that hesitate, and data volume is huge, and wherein also contain a lot of redundant datas, need take bigger bandwidth.This shows that the shared method of video data commonly used at present can not realize both playing synchronously fast, takes into account high-quality again and plays synchronously.
Summary of the invention
For addressing the above problem, the invention provides a kind of method and system that realize that multi-screen shows synchronously.During with synchronous broadcast of realizing the terminal room video fast synchronously and high-quality broadcast synchronously in real time.
The method that the realization multi-screen that the embodiment of the invention provides shows synchronously comprises: A, source screen are play a video file, and obtain the screen picture data and be sent to target screen and play synchronously; B, source screen are sent to target screen in real time with the address information of institute's playing video file and the current playing progress rate information of this video file; C, described target screen read described video file data according to described address information, and play from the current corresponding position of playing progress rate information that receives.
By when the transmission screen picture carries out fast broadcast synchronously, source foradownloaded video file according to described video file, and after downloading enough data volumes, switch to the video file of play-overing download, and correspond on the real-time playing progress rate, realize that namely multi-screen shares second synchronization, realize playing the slitless connection of screenshotss and playing video file itself, and play-over video file and guaranteed the high-quality broadcast.Thereby realize that devices with small screens is to the audio video synchronization of large-screen device, clear, smooth broadcast.
Wherein, the described address information of step B comprises: deposit the network linking address of described video file, or deposit the memory address of described video file source screen.
According to the source foradownloaded video file of described video file, can realize that multi-screen shares second synchronization.
Wherein, step C is described reads described video file data and is: read the data of video file after described current playing progress rate.
The recipient reads the data of video file after described current playing progress rate according to the file type of video file, can save spatial cache.
Wherein, step C also comprises after reading described video file data: described video file data are carried out buffer memory; The described broadcast from the current corresponding position of playing progress rate information that receives comprises: the difference of judging the playing progress rate of video file data of buffer memory and described current playing progress rate is play the described video file data of buffer memory during greater than pre-set threshold from the current playing progress rate of correspondence position.
Described source screen is according to the source of video file, source-information (file type), playing progress rate information and address information with video file when sending screen picture send to target screen, thereby make the target screen limit play the screen picture that receives, while foradownloaded video file, length up to the video file of downloading is enough play, can not improve the speed of information transmission owing to the phenomenon of the not enough generation card of played data screen, realize synchronous, seamless play between the terminal.
Wherein, also comprise after the step C: target screen notification source screen stops to obtain screen picture data and transmission.
By sending the instruction that stops to send screen picture to the source screen, save resource, improved the efficient of transfer of data.
Wherein, also comprise behind the step C: when target screen is judged described video file data read fault, return steps A.
By fault tolerance, the system that makes in time finds mistake, in time carries out functional rehabilitation, has improved the System Fault Tolerance performance.
Wherein, also comprise behind the step C: the difference that target screen is judged the playing progress rate of video file data of buffer memory and described current playing progress rate is returned steps A during less than pre-set threshold.
By fault tolerance, the system that makes in time finds mistake, in time carries out functional rehabilitation, has improved the System Fault Tolerance performance.
Wherein, also comprise before the steps A: the source screen is set up to share with target screen and is connected.
By setting up in advance shared the connection, set up the basis that multi-screen is shared of carrying out of origin screen and target screen.
The present invention also provides a kind of system that realizes that multi-screen shows synchronously, comprises source screen and target screen,
Described source screen comprises:
First image processing module is used for a video file is treated to the screen picture that the source screen will be play;
The screen picture acquisition module is connected with first image processing module, is used for obtaining the screen picture that the source screen will be play, and sends; With
The file attribute acquisition module is used for obtaining address information and the current playing progress rate information of this video file of described video file, and sends in real time;
Described target screen comprises:
The screen picture receiver module is used for receiving the screen picture that the screen image collection module sends;
The file attribute receiver module is for address information and the current playing progress rate information of the video file that receives the transmission of file attribute acquisition module;
The file acquisition module is used for reading described video file data according to the address information of described video file;
Second image processing module, the screen picture that is used for the source screen that view screen image receiver module obtains, and after the file acquisition module reads described video file data, play described video file from the current corresponding position of playing progress rate information that the file attribute receiver module receives.
By when the transmission screen picture carries out fast broadcast synchronously, source foradownloaded video file according to described video file, and after downloading enough data volumes, switch to the video file of play-overing download, and correspond on the real-time playing progress rate, realize that namely multi-screen shares second synchronization, realize playing the slitless connection of screenshotss and playing video file itself, and play-over video file and guaranteed the high-quality broadcast.Thereby realize that devices with small screens is to the audio video synchronization of large-screen device, clear, smooth broadcast.
Description of drawings
Fig. 1 is for realizing the schematic flow sheet of the method that multi-screen shows synchronously;
The system construction drawing of Fig. 2 for realizing that multi-screen shows synchronously.
Embodiment
The embodiment of the invention provides a kind of method that realizes that multi-screen shows synchronously, below in conjunction with accompanying drawing, describes the present invention.Show the system construction drawing that the present invention realizes that multi-screen shows synchronously as Fig. 2, comprise source screen 10, at least one target screen 20, the source screen 10 here and target screen 20 expressions have the terminal of display screen, for convenience, the terminal that will have the video file source is called the source screen, and the terminal that receives described video file is called target screen.Wherein, source screen 10 comprises
First image processing module 101 is used for local video file or network video file are decoded, and decodes the image that the source screen will be play, i.e. screen picture.
Screen picture acquisition module 102, be connected with first image processing module 101, be used for obtaining first image processing module 101 and decode the screen picture that the source screen will be play, or be called employing and grab the mode of screen and obtain shown image, and the screen picture that obtains is sent.With
File attribute acquisition module 103 is used for obtaining the local video file play or the file attribute information of network video file, and sends.Put down in writing the playing progress rate information of file type, corresponding file address information and the video file of playing video file to some extent in the described file attribute information, file attribute information will be described in detail later.
Screen picture receiver module 201 is used for receiving the screen picture that screen image collection module 102 sends, and offers second image processing module 202.
File attribute receiver module 203 is used for receiving the file attribute information that file attribute acquisition module 103 sends.
Second image processing module 202, be used for the screen picture that synchronous view screen image receiver module 201 obtains, and after file acquisition module 204 gets access to the video file data, switch to from the current corresponding position of playing progress rate information that the file attribute receiver module receives and play described video file.
Show the method that realization multi-screen provided by the invention shows synchronously as Fig. 1, may further comprise the steps:
S100: the source screen is set up to share with target screen and is connected.
This step can be that the demonstration request synchronously that sends is shielded in the source, after the response message of the affirmation that receives the target screen transmission, connects with target screen, and also can be to initiate demonstration request synchronously by target screen.
S110: source screen adopts the mode of grabbing screen in real time to target screen transmission screen view data, and to the attribute information of target screen transmitting video files.The described screen technology of grabbing is prior art, so repeat no more.
The attribute information of source screen 10 video files of playing comprises: file type, file address information and real-time playing progress rate information, wherein playing progress rate information can be the temporal information of video file.Wherein, in order to reduce data quantity transmitted, file type, file address information can only be transmitted 1 time.
If the video file that source screen 10 is play is from Internet resources, then above-mentioned file address information is the chained address of Internet resources correspondence, if this video file is the local resource of source screen 10, then above-mentioned file address information is its address of sharing of depositing this video file, as comprise deposit as described in the folder content of video file.
In the present embodiment, file type in the use fileinfo identifies the source of video file, file type information in the video file attribute information, can adopt the characteristic value mode, for example, characteristic value is network file for " 0 " representation file type, namely, video file derives from network, characteristic value is local file for " 1 " representation file type, that is, video file derives from the local file of source screen 10, if file type is network file, then also comprise network address information in the video file attribute information; If file type is local file, then also comprise the shared information of this video file storage addresses information (as the stored folder information of file) and this video file in the video file attribute information, as relate to shared check information (as reading the required password of this document etc.).
S120: target screen receives described screen picture data in real time and plays, with the synchronous demonstration that realizes shielding with the source.On the other hand, target screen is in the process that continues to receive described screen picture data and play, target screen is according to the described video file attribute information that receives, the file type of 10 current in progress video files is shielded in the judgement source, and read the corresponding file address information according to this document type, read data and the buffer memory of the later partial video file of described playing progress rate then to the corresponding file address according to the playing progress rate information of video file.
If it is network file that target screen is resolved the file type of described video file, target screen is according to the network address information in the video file attribute information, read required video file and buffer memory from this network address, this process also comprises the process that connects with this network address corresponding server; If it is local file that target screen is resolved the file type of described video file, the storage address place that then goes to deposit shared video file reads required video file and buffer memory.And as mentioned above, according to the playing progress rate information of the file that receives, in order to save the space of buffer memory, when reading video file, the file data that reads after current playing progress rate begins to download.
S130: target screen is judged when the playing progress rate of the video file correspondence of institute's buffer memory surpasses the threshold values of certain progress than current in progress progress, be that the video file of institute's buffer memory is when comprising current and follow-up some frame data, then shield the video file that the screen picture data that obtain switch to broadcast institute buffer memory by playing grabbing of receiving, and play the video file data of identical progress according to current playing progress rate.
When the progress difference of the progress of video file in the buffer memory of target screen and the video file that receives during greater than a certain threshold value, target screen stops reception sources screen information, playing progress rate information according to the video file that receives, play-over the video file in the buffer memory, and, Xiang Yuanping sends corresponding information, and the screen of grabbing of ending target screen sends.
Wherein, stored video file length is relevant with speed of download and download time in the buffer memory, increase along with download time, speed of download also can be accelerated, if stored video file length in the buffer memory, if be the later broadcast information of current playing progress rate more in short-term, card screen phenomenon can appear in the video information of play-overing in the buffer memory, for direct displaying video information from buffer memory, the progress difference of the progress that needs video file in the target screen buffer memory and the video file that receives is during greater than a certain threshold value, this threshold value is preset value, can be according to broadcasting speed, speed of download is set.
The screen image information of judging current broadcast when the central processing unit of target screen exists in its buffer memory, and the later information of this screen image information progress of storing in the buffer memory satisfies the threshold information of playing, namely, the progress of video file and the progress difference of the video file that receives are greater than this threshold value in the buffer memory of target screen, then target screen stops playing the screen that grasps, playing video file itself, make target screen play the video file progress and the file progress slitless connection that grasps the screen broadcast in the buffer memory, and notification source screen 10 stop grasping and transmit screen image information to target screen 20 at this moment.The audio video synchronization to target screen, clear, smooth broadcast are shielded in final realization source.
As seen from the above, the shared beginning of video file in the screen broadcast, employing is grabbed the screen transmission manner and can be shared with the quick of target screen institute playing video file by assurance source screen, and because the source screen may be different with the target screen size, the resolution difference, when the source screen is far smaller than the target screen size (for example the source screen is that PAD, target screen are TV), this mode can cause the target screen broadcasting pictures unclear.And by getting rid of judgement and read the video file of playing by target in the backstage, and switch to the corresponding data of playing this video file by the playing progress rate information synchronization, realize that target screen plays identical content with the source screen, and the target screen demonstration be video more clearly.
In addition, when the video file data of target screen buffer memory during less than a threshold value, then target screen sends corresponding information to the source screen again, and the request source screen continues to grab screen again and is sent to target screen, and returns step S110.The network failure that for example relates to target screen, the situation that causes the video playback of buffer memory to finish when causing target screen to connect the poor signal of network.
The above only is preferred embodiment of the present invention; not in order to limit the present invention; for example; the module of difference in functionality can be realized by an integrated chip etc.; all within the spirit and principles in the present invention; any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a method that realizes that multi-screen shows synchronously is characterized in that, comprising:
A, source screen is play a video file, and obtains the screen picture data and be sent to target screen and play synchronously;
B, source screen are sent to target screen in real time with the address information of institute's playing video file and the current playing progress rate information of this video file;
C, described target screen read described video file data according to described address information, and play from the current corresponding position of playing progress rate information that receives.
2. method according to claim 1 is characterized in that, the described address information of step B comprises: deposit the network linking address of described video file, or deposit the memory address of described video file source screen.
3. method according to claim 1 is characterized in that, step C is described to be read described video file data and be: read the data of video file after described current playing progress rate.
4. method according to claim 3 is characterized in that also comprising after step C reads described video file data: described video file data are carried out buffer memory;
Described and play from the current corresponding position of playing progress rate information that receives and to comprise: but the difference of judging the playing progress rate of video file data of buffer memory and described current playing progress rate is play the described video file data of buffer memory during greater than pre-set threshold from the position of the current playing progress rate of correspondence.
5. method according to claim 1 is characterized in that, also comprises after step C: target screen notification source screen stops to obtain screen picture data and transmission.
6. method according to claim 1 or 5 is characterized in that, also comprises behind the step C: when target screen is judged described video file data read fault, return steps A.
7. method according to claim 1 is characterized in that, also comprises behind the step C: but the difference that target screen is judged the playing progress rate of video file data of buffer memory and described current playing progress rate is returned steps A during less than pre-set threshold.
8. method according to claim 1 is characterized in that, also comprises before the steps A: the source screen is set up to share with target screen and is connected.
9. a system that realizes that multi-screen shows synchronously comprises source screen and target screen, it is characterized in that,
Described source screen comprises:
First image processing module is used for a video file is treated to the screen picture that the source screen will be play;
The screen picture acquisition module is connected with first image processing module, is used for obtaining the screen picture that the source screen will be play, and sends; With
The file attribute acquisition module is used for obtaining address information and the current playing progress rate information of this video file of described video file, and sends in real time;
Described target screen comprises:
The screen picture receiver module is used for receiving the screen picture that the screen image collection module sends;
The file attribute receiver module is for address information and the current playing progress rate information of the video file that receives the transmission of file attribute acquisition module;
The file acquisition module is used for reading described video file data according to the address information of described video file;
Second image processing module, the screen picture that is used for the source screen that view screen image receiver module obtains, and after the file acquisition module reads described video file data, play described video file from the current corresponding position of playing progress rate information that the file attribute receiver module receives.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210023855.7A CN103248939B (en) | 2012-02-03 | 2012-02-03 | A kind of method and system realized multi-screen synchronous and shown |
| PCT/CN2012/073672 WO2013113190A1 (en) | 2012-02-03 | 2012-04-09 | Method and system for implementing multi-screen synchronous display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210023855.7A CN103248939B (en) | 2012-02-03 | 2012-02-03 | A kind of method and system realized multi-screen synchronous and shown |
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| CN103248939A true CN103248939A (en) | 2013-08-14 |
| CN103248939B CN103248939B (en) | 2017-11-28 |
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| CN201210023855.7A Active CN103248939B (en) | 2012-02-03 | 2012-02-03 | A kind of method and system realized multi-screen synchronous and shown |
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| WO (1) | WO2013113190A1 (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN103248939B (en) | 2017-11-28 |
| WO2013113190A1 (en) | 2013-08-08 |
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