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WO2013113190A1 - Procédé et système pour mettre en œuvre un affichage synchrone sur plusieurs écrans - Google Patents

Procédé et système pour mettre en œuvre un affichage synchrone sur plusieurs écrans Download PDF

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Publication number
WO2013113190A1
WO2013113190A1 PCT/CN2012/073672 CN2012073672W WO2013113190A1 WO 2013113190 A1 WO2013113190 A1 WO 2013113190A1 CN 2012073672 W CN2012073672 W CN 2012073672W WO 2013113190 A1 WO2013113190 A1 WO 2013113190A1
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WO
WIPO (PCT)
Prior art keywords
screen
video file
file
source
data
Prior art date
Application number
PCT/CN2012/073672
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English (en)
Chinese (zh)
Inventor
喻子达
王袭
赵向阳
韩文
朴成杰
黄橙
周林
安娜
Original Assignee
海尔集团公司
海尔集团技术研发中心
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 海尔集团公司, 海尔集团技术研发中心 filed Critical 海尔集团公司
Publication of WO2013113190A1 publication Critical patent/WO2013113190A1/fr

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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
    • 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

Definitions

  • the present invention relates to the field of information transmission technologies, and in particular, to a method and system for implementing multi-screen synchronous display.
  • Triple network integration is also called “triple play”. It means that the telecommunication network, cable TV network and computer communication network are mutually infiltrated, compatible with each other, and gradually integrated into a unified information and communication network around the world, which can provide users with voice. , data and broadcast TV and other services.
  • multi-screen fusion has become the development trend of the current terminal, and can support various terminals to access the video content of a certain terminal anytime and anywhere, so that it can be realized between a television, a computer, a mobile phone, and a tablet computer.
  • the sharing of video content for example, sharing photos, videos, games, and interactive management, etc., synchronizes the video content of smart terminals such as iPhones and iPads to the television, which is convenient for users to use.
  • the user can upload the multimedia file to the server through HTTP or FTP protocol or provide the multimedia file address to the target party.
  • the target party can view the multimedia file by using the browser to log in to the website, but this method increases the complexity of the file transmission and the network bandwidth. pressure.
  • video sharing can be performed through video sessions and video conferencing, but video sessions and video conferencing usually only transfer small files.
  • the captured video file can be intercepted by the video file at a certain frequency, and the captured image can be directly transmitted to the target party, and then the target party can directly play the screen after receiving the screen capture.
  • this method is to share the small screen device to the large screen device, the resolution and resolution of the transmitted screen capture information are very low, and hesitant to transmit all the picture information, the amount of data is huge, and there is still a lot of redundancy. The remaining data requires a large bandwidth. It can be seen that the currently used video data sharing method cannot achieve fast synchronous playback and high quality synchronous playback.
  • the present invention provides a method and system for implementing multi-screen synchronous display. To achieve fast synchronization and high-quality real-time synchronous playback when the video is synchronized between terminals.
  • the method for realizing multi-screen synchronous display comprises: A.
  • a source screen plays a video file, and acquires screen image data to be sent to a target screen for synchronous play; B.
  • the source screen displays address information of the played video file. And the current play progress information of the video file is sent to the target screen in real time; C.
  • the target screen reads the video file data according to the address information, and plays the position corresponding to the received current play progress information. .
  • the address information in step B includes: a network link address for storing the video file, or a storage address of the source screen of the video file.
  • the multi-screen sharing secondary synchronization can be implemented by downloading the video file according to the source of the video file.
  • the reading the video file data in step C is: reading data of the video file after the current playback progress.
  • the receiving party can save the buffer space by reading the data of the video file after the current playing progress according to the file type of the video file.
  • the method further includes: buffering the video file data; and playing the position corresponding to the received current playback progress information includes: determining the cached video file data. When the difference between the play progress and the current play progress is greater than a preset threshold, the cached video file data is played from the corresponding current play progress position.
  • the source screen sends the source information (file type), the play progress information, and the address information of the video file to the target screen according to the source of the video file, so that the target screen edge plays the received screen image, and simultaneously
  • the video file is downloaded until the length of the downloaded video file is sufficient to play, and the card screen phenomenon is not generated due to insufficient playing data, thereby improving the rate of information transmission and realizing synchronization and seamless playback between terminals.
  • the step C further includes: the target screen notifying the source screen to stop acquiring the screen image data and transmitting.
  • the step C further includes: when the target screen determines that the video file data is faulty, the process returns to step A.
  • the system can detect errors in time, perform functional recovery in time, and improve system fault tolerance.
  • the step C further includes: when the target screen determines that the difference between the playback progress of the cached video file data and the current playback progress is less than a preset threshold, the process returns to step A.
  • the system can detect errors in time, perform functional recovery in time, and improve system fault tolerance.
  • the step A also includes: establishing a shared connection between the source screen and the target screen.
  • the basis for multi-screen sharing between the origin screen and the target screen is established by establishing a shared connection in advance.
  • the invention also provides a system for realizing multi-screen synchronous display, comprising a source screen and a target screen,
  • the source screen includes:
  • a first image processing module configured to process a video file as a screen image to be played by the source screen
  • a screen image acquiring module connected to the first image processing module, configured to acquire a screen image to be played by the source screen, and send the screen image;
  • a file attribute obtaining module configured to acquire address information of the video file and current playback progress information of the video file, and send the data in real time;
  • the target screen includes:
  • a screen image receiving module configured to receive a screen image sent by the screen image acquiring module
  • a file attribute receiving module configured to receive address information of the video file sent by the file attribute obtaining module and current playing progress information
  • a file obtaining module configured to read the video file data according to address information of the video file
  • a second image processing module configured to play a screen image of the source screen acquired by the screen image receiving module, and a current playback progress information received by the file attribute receiving module after the file obtaining module reads the video file data The video file is played at the corresponding location.
  • 1 is a schematic flow chart of a method for realizing multi-screen synchronous display
  • FIG. 2 is a structural diagram of a system for realizing multi-screen synchronous display.
  • FIG. 2 is a structural diagram of a system for implementing multi-screen synchronous display according to the present invention, including a source screen 10 and at least one target screen 20, where the source screen 10 and the target screen 20 represent terminals having a display screen, which will be convenient for description.
  • a terminal having a video file source is referred to as a source screen, and a terminal receiving the video file is referred to as a target screen.
  • the source screen 10 includes
  • the first image processing module 101 is configured to decode a local video file or a network video file, and decode an image to be played by the source screen, that is, a screen image.
  • the screen image acquisition module 102 is connected to the first image processing module 101 for acquiring a screen image to be played by the first image processing module 101 to decode the source screen, or acquiring the displayed image by using a screen capture method, and The acquired screen image is sent out.
  • the file attribute obtaining module 103 is configured to acquire file attribute information of the played local video file or the network video file, and send the file attribute information.
  • the file attribute information describes the file type of the played video file, the corresponding file address information, and the playback progress information of the video file, and the file attribute information will be described in detail later.
  • the target screen 20 includes:
  • the screen image receiving module 201 is configured to receive the screen image sent by the screen image acquiring module 102 and provide the image to the second image processing module 202.
  • the file attribute receiving module 203 is configured to receive file attribute information sent by the file attribute obtaining module 103.
  • the file obtaining module 204 is configured to obtain the local video from the corresponding source screen or the network according to the file type of the video file and the corresponding file address information and the playback progress information of the video file recorded in the file attribute information acquired by the file attribute receiving module 203.
  • the second image processing module 202 is configured to synchronously play the screen image acquired by the screen image receiving module 201, and after the file obtaining module 204 acquires the video file data, switch to the current playback progress information received from the file attribute receiving module.
  • the video file is played at the corresponding location.
  • FIG. 1 illustrates a method for implementing multi-screen synchronous display provided by the present invention, including the following steps:
  • S100 The source screen establishes a shared connection with the target screen.
  • the step may be that the source screen sends a synchronous display request, and after receiving the acknowledged response information sent by the target screen, establishing a connection with the target screen, or may initiate a synchronous display request by the target screen.
  • the source screen transmits screen image data to the target screen in real time by means of screen capture, and transmits attribute information of the video file to the target screen.
  • the screen capture technology is prior art and will not be described again.
  • the attribute information of the video file played by the source screen 10 includes: a file type, file address information, and real-time playback progress information, wherein the play progress information may be time information of the video file. Among them, in order to reduce the amount of data transferred, file type and file address information can be transmitted only once.
  • the file address information is a link address corresponding to the network resource. If the video file is a local resource of the source screen 10, the file address information is a share of the video file. The address, such as the folder directory where the video file is stored.
  • the file type in the file information is used to identify the source of the video file
  • the file type information in the video file attribute information may be in a feature value manner.
  • the feature value is “0” to represent the file type as a network file. That is, the video file is derived from the network, and the feature value of “1” represents that the file type is a local file, that is, the video file is derived from the local file of the source screen 10. If the file type is a network file, the video file attribute information is also included.
  • the video file attribute information also includes address information (such as folder information stored in the file) stored in the video file and shared information of the video file, such as verification related to sharing Information (such as the password required to read the file, etc.).
  • the target screen receives the screen image data in real time and plays it to realize synchronous display with the source screen.
  • the target screen determines the file type of the video file currently being played by the source screen 10 according to the received video file attribute information, and according to the The file type reads the corresponding file address information, and then reads and caches the data of the partial video file after the playback progress according to the playback progress information of the video file to the corresponding file address.
  • the target screen parses the file type of the video file as a network file
  • the target screen reads the required video file from the network address and caches according to the network address information in the video file attribute information, and the process further includes The process of establishing a connection by the server corresponding to the address; if the target screen parses the file type of the video file as a local file, the desired video file is read and cached at the storage address where the shared video file is stored. Further, as described above, in order to save the buffer space according to the playback progress information of the received file, when the video file is read, the reading is started from the file data after the current playback progress.
  • the target screen determines that the playback progress of the cached video file exceeds the threshold of the current progress when the currently playing progress exceeds a certain progress threshold, that is, when the buffered video file includes current and subsequent frame data, the screen capture received by the play is obtained.
  • the screen image data is switched to play the cached video file, and the same progress video file data is played according to the current playback progress.
  • the target screen stops receiving the source screen information, and directly plays the cache according to the playback progress information of the received video file.
  • the video file, and the corresponding information is sent to the source screen, and the screen capture of the target screen is suspended.
  • the length of the video file stored in the cache is related to the download speed and the download time. As the download time increases, the download speed will also increase. If the length of the video file stored in the cache, that is, the playback information after the current playback progress, When the video information in the cache is directly played, the card screen phenomenon occurs. In order to play the video information directly from the cache, the progress of the video file in the target screen buffer and the progress of the received video file are greater than a certain threshold.
  • the threshold is a preset value and can be set according to the playback speed and the download speed.
  • the central processing device of the target screen determines that the currently played screen image information already exists in its cache, and the information after the progress of the screen image information stored in the cache satisfies the threshold information for playing, that is, the video in the cache of the target screen If the progress of the file and the progress of the received video file are greater than the threshold, the target screen terminates the playback of the captured screen, and the video file itself is played, so that the progress of the video file in the target screen playback buffer and the progress of the file played on the capture screen are performed. Seamless docking, and at this time the notification source screen 10 terminates the capture and transmission of the screen image information to the target screen 20. Finally, the video from the source screen to the target screen is synchronized, clear and smooth.
  • the screen capture transmission mode can ensure the fast sharing of the video files played by the source screen and the target screen, and the resolution may be different due to the size of the source screen and the target screen.
  • the source screen is much smaller than the target screen size (for example, the source screen is PAD and the target screen is TV)
  • this method will cause the target screen to play unclear.
  • the target screen is judged and read by the target screen, and the playback progress information is synchronously switched to play the corresponding data of the video file, so that the target screen and the source screen play the same content, and the target screen displays Clearer video.
  • the target screen when the video file data cached by the target screen is less than a threshold, the target screen sends corresponding information to the source screen, requests the source screen to continue to capture the screen and sends the image to the target screen, and returns to step S110.
  • a network failure involving the target screen causes the cached video to finish playing when the signal of the target screen connected to the network is not good.

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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

La présente invention se rapporte à un procédé adapté pour mettre en œuvre un affichage synchrone sur plusieurs écrans. Le procédé selon l'invention comprend les étapes suivantes : A. un écran source affiche un fichier vidéo, il acquiert des données d'image d'écran et transmet ces données d'image d'écran à un écran de destination en vue d'une lecture synchrone ; B. l'écran source transmet, en temps réel, à l'écran de destination, des données d'adresse relatives au fichier vidéo qui est affiché ainsi que des données relatives à la progression de la lecture en cours du fichier vidéo ; et, C. l'écran de destination lit les données du fichier vidéo sur la base des données d'adresse, et il les affiche à partir de la position qui correspond aux données relatives à la progression de la lecture en cours qui ont été reçues. La présente invention se rapporte d'autre part à un système adapté pour mettre en œuvre un affichage synchrone sur plusieurs écrans. En téléchargeant le fichier vidéo à partir de la source du fichier vidéo en même temps que l'image d'écran est transmise et affichée, une resynchronisation partagée sur plusieurs écrans est mise en œuvre, et une connectivité ininterrompue est mise en œuvre pour lire des instantanés d'écran. Par ailleurs, quand le fichier vidéo est lu, il est possible de mettre en œuvre une lecture vidéo synchrone, propre et lisse, d'un dispositif ayant un petit écran sur un dispositif ayant un écran plus grand.
PCT/CN2012/073672 2012-02-03 2012-04-09 Procédé et système pour mettre en œuvre un affichage synchrone sur plusieurs écrans WO2013113190A1 (fr)

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CN201210023855.7 2012-02-03
CN201210023855.7A CN103248939B (zh) 2012-02-03 2012-02-03 一种实现多屏同步显示的方法及系统

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