CN103248939B - A kind of method and system realized multi-screen synchronous and shown - Google Patents
A kind of method and system realized multi-screen synchronous and shown Download PDFInfo
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- CN103248939B CN103248939B CN201210023855.7A CN201210023855A CN103248939B CN 103248939 B CN103248939 B CN 103248939B CN 201210023855 A CN201210023855 A CN 201210023855A CN 103248939 B CN103248939 B CN 103248939B
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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
-
- 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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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- 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 kind of method realized multi-screen synchronous and shown, including：A, source screen plays a video file, and obtains screen image data and send to target screen and synchronize broadcasting；B, source screen sends the currently playing progress msg of the address information of institute's playing video file and the video file to target screen in real time；C, the target screen reads the video file data according to the address information, and is played out from the position corresponding to the current playback progress information received.Further correspondingly provide the system that multi-screen synchronous is shown, by while transmission screen picture plays out, according to the source downloading video files of the video file, it can realize that multi-screen shares second synchronization, realize and play screenshotss and the slitless connection of playing video file in itself, so as to realize audio video synchronization of the devices with small screens to large-size screen monitors proscenia, clear, smooth broadcasting.
Description
Technical field
The present invention relates to technical field of information transmission, more particularly to a kind of method and system realized multi-screen synchronous and shown.
Background technology
" integration of three networks " is called " unification of three nets ", refers to mutually oozing for telecommunications network, cable television network and computer communication network
Thoroughly, it is compatible and be progressively integrated into the unified communication network in the whole world, voice, data and wide can be provided the user
Broadcast a variety of services such as TV.
With the fast development of mobile Internet, Multiple-screen integration turns into the development trend of present terminal, can whenever and wherever possible
Support various terminals to access the video content of a certain terminal, so as to television set, computer, mobile phone, tablet personal computer it
Between realize the shared of video content, for example, shared photo, video, game and interaction managing and control etc., by intelligence such as iPhone, ipad
The video content of energy terminal is synchronized on television set, can be with user-friendly.
Multimedia file can be uploaded onto the server or provide more matchmakers to target side by user by agreements such as HTTP, FTP
Body file address, target side watches multimedia file by using browser Website login, but this mode adds file biography
Defeated complexity and the pressure of network bandwidth.Or video can be carried out by way of video session, video conference and shared, but
Video session, the mode of video conference are typically only capable to transmit small documents.Or can by Email attachment interactive multimedia file, but
It is that this sharing mode necessarily requires calling and called to simultaneously participate in can just to complete, and video playback is disposable.
In addition, also video file can be intercepted according to certain frequency by the video file to playing, by intercepting and capturing
Picture is conveyed directly to target side, and then target side directly plays after receiving screenshotss.But if this mode is by smaller screen
Proscenia is to the shared of large-size screen monitors proscenia, and the resolution ratio and definition for the screenshotss information transmitted are all very low, and the transmission that hesitates
All pictorial informations, data volume is huge, and wherein also containing many redundant datas, it is necessary to take larger bandwidth.Thus
It can be seen that currently used video data sharing method can not realize both Fast synchronization broadcastings, high quality is taken into account again and is synchronously played.
The content of the invention
To solve the above problems, the invention provides a kind of method and system realized multi-screen synchronous and shown.To realize eventually
Fast synchronization and high quality real-time synchronization between end during the synchronous broadcasting of video play.
The method provided in an embodiment of the present invention realized multi-screen synchronous and shown, including：A, source screen plays a video file, and
Acquisition screen image data, which is sent to target screen, synchronizes broadcasting；B, source screen by the address information of institute's playing video file and is somebody's turn to do
The currently playing progress msg of video file is sent to target screen in real time；C, the target screen reads institute according to the address information
Video file data is stated, and is played out from the position corresponding to the current playback progress information received.
By while screen picture progress Fast synchronization broadcasting is transmitted, being downloaded and being regarded according to the source of the video file
Frequency file, and after enough data volumes are downloaded, the video file for directly playing and downloading is switched to, and correspond to and broadcast in real time
On degree of putting into, that is, realize that multi-screen shares second synchronization, realize and play screenshotss and the slitless connection of playing video file in itself, and directly
Connect playing video file and ensure that high quality plays.So as to realize devices with small screens to large-size screen monitors proscenia audio video synchronization, it is clear,
Smooth broadcasting.
Wherein, address information described in step B includes：The network linking address of the video file is deposited, or described in storage
The storage address of video file source screen.
According to the source downloading video files of the video file, it is possible to achieve multi-screen shares second synchronization.
Wherein, the video file data is read described in step C is：Read video file the currently playing progress it
Data afterwards.
Recipient reads data of the video file after the currently playing progress according to the file type of video file,
Spatial cache can be saved.
Wherein, step C also includes after reading the video file data：The video file data is cached；Institute
State from the position corresponding to the current playback progress information received play out including：Judge the video file data of caching
Playing progress rate and the difference of currently playing progress when being more than threshold value set in advance, by the video file data of caching
Played out from corresponding currently playing progress position.
The source screen is according to the source of video file, by the source-information of video file while screen picture is sent
(file type), playback progress information and address information are sent to target screen, so that target screen side plays the screen received
Image, while downloading video files, will not be due to played data deficiency until the length for the video file downloaded plays enough
The phenomenon of card screen is produced, improves the speed of information transfer, realizes synchronization between terminal, seamless play.
Wherein, also include after step C：Target screen notice source screen stops obtaining screen image data and transmission.
By sending the instruction for stopping sending screen picture to source screen, resource is saved, improves the efficiency of data transfer.
Wherein, also include after step C：When target screen judges the video file data read failure, return to step A.
Pass through fault tolerance so that system finds mistake in time, carries out functional rehabilitation in time, improves System Error-tolerance Property
Energy.
Wherein, also include after step C：Target screen judges that the playing progress rate of the video file data of caching is currently broadcast with described
When the difference of degree of putting into is less than threshold value set in advance, return to step A.
Pass through fault tolerance so that system finds mistake in time, carries out functional rehabilitation in time, improves System Error-tolerance Property
Energy.
Wherein, also include before step A：Source screen establishes shared connection with target screen.
By pre-establishing shared connection, it is established that the basis for carrying out multi-screen and sharing of source screen and target screen.
Present invention also offers a kind of system realized multi-screen synchronous and shown, including source screen and target screen,
The source screen includes：
First image processing module, for being the source screen screen picture to be played by video file processing；
Screen picture acquisition module, it is connected with the first image processing module, the screen map to be played for obtaining source screen
Picture, and send；With
File attribute acquisition module, for obtain the video file address information and the video file it is currently playing enter
Information is spent, and is sent in real time；
The target screen includes：
Screen picture receiving module, for receiving the screen picture of screen image collection module transmission；
File attribute receiving module, for receive file attribute acquisition module transmission video file address information and work as
Preceding playback progress information；
File acquisition module, for reading the video file data according to the address information of the video file；
Second image processing module, the screen picture of the source screen obtained for view screen image receiver module, Yi Ji
After file acquisition module reads the video file data, the current playing progress rate that is received from file attribute receiving module
Position corresponding to information plays the video file.
By while screen picture progress Fast synchronization broadcasting is transmitted, being downloaded and being regarded according to the source of the video file
Frequency file, and after enough data volumes are downloaded, the video file for directly playing and downloading is switched to, and correspond to and broadcast in real time
On degree of putting into, that is, realize that multi-screen shares second synchronization, realize and play screenshotss and the slitless connection of playing video file in itself, and directly
Connect playing video file and ensure that high quality plays.So as to realize devices with small screens to large-size screen monitors proscenia audio video synchronization, it is clear,
Smooth broadcasting.
Brief description of the drawings
Fig. 1 is the schematic flow sheet for realizing the method that multi-screen synchronous is shown；
Fig. 2 is to realize the system construction drawing that multi-screen synchronous is shown.
Embodiment
The embodiments of the invention provide a kind of method realized multi-screen synchronous and shown, below in conjunction with accompanying drawing, to the present invention
It is described in detail.The present invention realizes the system construction drawing that multi-screen synchronous is shown, including source screen 10, at least one as shown in Figure 2
Individual target screen 20, source screen 10 and target screen 20 here represent the terminal with display screen, for convenience, will have video
The terminal of file source is referred to as source screen, and the terminal for receiving the video file is referred to as into target screen.Wherein, source screen 10 includes
First image processing module 101, for being decoded to local video file or network video file, decode source
Shield the image to be played, i.e. screen picture.
Screen picture acquisition module 102, it is connected with the first image processing module 101, for obtaining the first image procossing mould
Block 101 decodes the source screen screen picture to be played, or to obtain shown image by the way of screen is grabbed, and will obtain
The screen picture taken is sent.With
File attribute acquisition module 103, for obtaining the file of played local video file or network video file
Attribute information, and send.The file type of playing video file, corresponding text described in the file attribute information
The playback progress information of part address information and video file, file attribute information will be described in detail later.
Target screen 20 includes：
Screen picture receiving module 201, for receiving the screen picture of the transmission of screen image collection module 102, there is provided give
Second image processing module 202.
File attribute receiving module 203, for receiving the file attribute information of the transmission of file attribute acquisition module 103.
File acquisition module 204, for described in the file attribute information that is obtained according to file attribute receiving module 203
The file type of video file and corresponding file address information and the playback progress information of video file, to corresponding source screen or
Network Capture local video file or network video file.With
Second image processing module 202, the screen picture obtained for synchronous view screen image receiver module 201, with
And after file acquisition module 204 gets video file data, be switched to received from file attribute receiving module it is current
Playback progress information corresponding to position play the video file.
As Fig. 1 shows the method provided by the invention realized multi-screen synchronous and shown, comprise the following steps：
S100：Source screen establishes shared connection with target screen.
The step can be that source screen sends simultaneous display request, when the response message for the confirmation for receiving target screen transmission
Afterwards, connection is established with target screen or simultaneous display request is initiated by target screen.
S110：Source screen transmits screen image data to target screen in real time by the way of screen is grabbed, and is regarded to target screen transmission
The attribute information of frequency file.The screen technology of grabbing is prior art, therefore is repeated no more.
The attribute information for the video file that source screen 10 is played includes：File type, file address information and in real time
Playback progress information, wherein playback progress information can be the temporal informations of video file.Wherein, in order to reduce the data of transmission
Amount, file type, file address information can be transmitted only 1 time.
If the video file that source screen 10 plays comes from Internet resources, above-mentioned file address information is that Internet resources are corresponding
Chained address, if the video file be source screen 10 local resource, above-mentioned file address information be its deposit the video text
The shared address of part, the folder content of video file as described in including storage.
In the present embodiment, the source of video file, video file category are identified using the file type in fileinfo
Property information in file type information, characteristic value mode can be used, for example, characteristic value be " 0 " represent file type as network
File, i.e. video file derives from network, and characteristic value is that " 1 " represents file type as local file, i.e. video file source
In the local file of source screen 10, if file type is network file, network address is also included in video file attributes information
Information；If file type is local file, the address letter of video file storage is also included in video file attributes information
(folder information deposited such as file) and the shared information of the video file are ceased, such as relating to shared check information is (such as
Read password needed for this document etc.).
S120：Screen image data described in target screen real-time reception simultaneously plays out, to realize the simultaneous display with source screen.
On the other hand, target screen it is lasting receive the screen image data and play out during, target screen is according to reception
The video file attributes information, judge the file type for the video file that source screen 10 is currently played, and according to this document
File address information corresponding to type reading, then according to the playback progress information of video file, the file address corresponding to is read
The data and caching of the later partial video file of the playing progress rate.
If the file type that target screen parses the video file is network file, target screen is according to video file attributes
Network address information in information, at the network address read needed for video file and caching, this process also include with
Server corresponding to the network address establishes the process of connection；If the file type that target screen parses the video file is this
Ground file, then video file and caching needed for reading are removed at the storage address of the shared video file of storage.Also, as above institute
State, according to the playback progress information of the file of reception, in order to save the space of caching, when reading video file, read from working as
File data after preceding playing progress rate proceeds by download.
S130：Target screen judges that playing progress rate corresponding to cached video file exceedes than the progress being currently played
During the threshold values of certain progress, that is, when the video file cached includes current and follow-up some frame data, then received by playing
The obtained screen image data of screen of grabbing be switched to and play cached video file, and played according to currently playing progress identical
The video file data of progress.
When the progress difference of the progress of video file in the caching of target screen and the video file received is more than a certain threshold
During value, target screen stops reception source screen information, according to the playback progress information of the video file received, directly plays in caching
Video file, also, send corresponding information to source screen, the screen of grabbing for stopping target screen is sent.
Wherein, the video file lengths deposited in caching are relevant with speed of download and download time, with download time
Increase, speed of download can also accelerate, if the video file lengths deposited in caching, i.e., currently playing progress is later to be broadcast
If put information it is shorter when, directly play caching in video information occur card screen phenomenon, in order to directly be broadcast from caching
Video information is put, it is necessary to which the progress of video file and the progress difference of video file that is received are more than a certain in target screen caching
During threshold value, the threshold value is preset value, can be set according to broadcasting speed, speed of download.
When the central processing unit of target screen judges that currently playing screen image information has existed in its caching,
And the later information of the screen image information progress that is stored meets the threshold information played in caching, i.e. target screen
The progress of video file and the progress difference of the video file received are more than the threshold value in caching, then target screen terminates broadcasting and grabbed
The screen taken, playing video file is in itself so that what the video file progress that target screen plays in caching played with capture screen
File progress slitless connection, and now notify source screen 10 terminates to capture and transmit screen image information to target screen 20.Finally
Realize audio video synchronization of the source screen to target screen, clear, smooth broadcasting.
As seen from the above, the beginning that the video file played in screen is shared, can be protected by the way of screen transmission is grabbed
Card source screen is quickly shared with target screen institute's playing video file, and because source screen may different, resolution ratio from target screen size
Difference, when when source, screen is far smaller than target screen size (such as source screen is that PAD, target screen are TV), this mode can cause mesh
Mark screen broadcasting pictures are unclear.And got rid of by backstage by target and judge and read played video file, and pass through broadcasting
Progress msg synchronism switching realizes that target screen plays identical content with source screen to the corresponding data for playing the video file, and
And target screen show for more visible video.
In addition, when the video file data of target screen caching is less than a threshold value, then target screen is sent corresponding to source screen again
Information, request source screen, which is further continued for grabbing, to be shielded and sends to target screen, and return to step S110.Such as it is related to the network event of target screen
Barrier, the situation for causing target screen to cause the video playback of caching to finish when connecting the poor signal of network.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, for example, can be by difference
The module of function realized by an integrated chip, within the spirit and principles in the present invention, any modification for being made,
Equivalent substitution, improvement etc., should be included within the scope of protection of the utility model.
Claims (7)
- A kind of 1. method realized multi-screen synchronous and shown, it is characterised in that including：A, source screen plays a video file, and obtains screen image data and send to target screen and synchronize broadcasting；B, source screen sends the currently playing progress msg of the address information of institute's playing video file and the video file extremely in real time Target screen；C, the target screen reads the video file data according to the address information, and enters from the current broadcasting received Position corresponding to degree information plays out；Wherein, the video file data is read described in step C is：Video file is read after the currently playing progress Data；Wherein, step C also includes after reading the video file data：The video file data is cached；It is described and from the position corresponding to the current playback progress information received play out including：Judge the video of caching When the difference of the playable progress of file data and the currently playing progress is more than threshold value set in advance, it will be regarded described in caching Frequency file data play out from the position of corresponding currently playing progress.
- 2. according to the method for claim 1, it is characterised in that address information described in step B includes：Deposit the video text The network linking address of part, or the storage address of storage video file source screen.
- 3. according to the method for claim 1, it is characterised in that also include after step c：Target screen notice source screen stops The acquisition and transmission of screen image data.
- 4. the method according to claim 1 or 3, it is characterised in that also include after step C：Target screen judges the video During file data read failure, return to step A.
- 5. according to the method for claim 1, it is characterised in that also include after step C：Target screen judges the video text of caching When the difference of the playable progress of number of packages evidence and the currently playing progress is less than threshold value set in advance, return to step A.
- 6. according to the method for claim 1, it is characterised in that also include before step A：Source screen establishes shared connect with target screen Connect.
- 7. a kind of system realized multi-screen synchronous and shown, including source screen and target screen, it is characterised in thatThe source screen includes：First image processing module, for being the source screen screen picture to be played by video file processing；Screen picture acquisition module, it is connected with the first image processing module, the screen picture to be played for obtaining source screen, and Send；WithFile attribute acquisition module, the currently playing progress letter of address information and the video file for obtaining the video file Breath, and send in real time；The target screen includes：Screen picture receiving module, for receiving the screen picture of screen image collection module transmission；File attribute receiving module, for the video file that receives the transmission of file attribute acquisition module address information and currently broadcast Put progress msg；File acquisition module, for reading the video file data according to the address information of the video file；Second image processing module, the screen picture of the source screen obtained for view screen image receiver module, and in file After acquisition module reads the video file data, the current playback progress information that is received from file attribute receiving module Corresponding position plays the video file；Wherein, it is described to read the video file data and be：Video file is read to exist Data after the currently playing progress；Wherein, second image processing module is gone back after reading the video file data Including：The video file data is cached；The current playing progress rate received from file attribute receiving module Position corresponding to information, which plays the video file, to be included：Judge caching video file data playable progress with it is described When the difference of currently playing progress is more than threshold value set in advance, by the video file data of caching from it is corresponding it is currently playing enter The position of degree plays out.
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| 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 CN103248939A (en) | 2013-08-14 |
| CN103248939B true 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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| Country | Link |
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| WO (1) | WO2013113190A1 (en) |
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| CN103248939A (en) | 2013-08-14 |
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