WO2013178190A2 - 一种视频推荐业务中播放同步控制方法及装置、系统 - Google Patents

一种视频推荐业务中播放同步控制方法及装置、系统 Download PDF

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Publication number
WO2013178190A2
WO2013178190A2 PCT/CN2013/080637 CN2013080637W WO2013178190A2 WO 2013178190 A2 WO2013178190 A2 WO 2013178190A2 CN 2013080637 W CN2013080637 W CN 2013080637W WO 2013178190 A2 WO2013178190 A2 WO 2013178190A2
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WO
WIPO (PCT)
Prior art keywords
playback
terminal
video
party terminal
progress information
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PCT/CN2013/080637
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English (en)
French (fr)
Other versions
WO2013178190A3 (zh
Inventor
田承平
Original Assignee
中兴通讯股份有限公司
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to EP13797183.4A priority Critical patent/EP2879391A4/en
Priority to US14/424,513 priority patent/US9723368B2/en
Publication of WO2013178190A2 publication Critical patent/WO2013178190A2/zh
Publication of WO2013178190A3 publication Critical patent/WO2013178190A3/zh

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Classifications

    • 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
    • H04N21/47—End-user applications
    • H04N21/482—End-user interface for program selection
    • H04N21/4826—End-user interface for program selection using recommendation lists, e.g. of programs or channels sorted out according to their score
    • 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]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/242—Synchronization processes, e.g. processing of PCR [Program Clock References]
    • 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]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/24—Monitoring of processes or resources, e.g. monitoring of server load, available bandwidth, upstream requests
    • H04N21/2407—Monitoring of transmitted content, e.g. distribution time, number of downloads
    • 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]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
    • H04N21/251—Learning process for intelligent management, e.g. learning user preferences for recommending movies
    • 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
    • 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
    • H04N21/4305—Synchronising client clock from received content stream, e.g. locking decoder clock with encoder clock, extraction of the PCR packets
    • 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
    • H04N21/432—Content retrieval operation from a local storage medium, e.g. hard-disk
    • H04N21/4325—Content retrieval operation from a local storage medium, e.g. hard-disk by playing back content from the storage medium
    • 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
    • H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
    • H04N21/44008—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving operations for analysing video streams, e.g. detecting features or characteristics in the video stream
    • 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
    • H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
    • H04N21/466—Learning process for intelligent management, e.g. learning user preferences for recommending movies
    • H04N21/4668—Learning process for intelligent management, e.g. learning user preferences for recommending movies for recommending content, e.g. movies
    • 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
    • H04N21/47—End-user applications
    • H04N21/478—Supplemental services, e.g. displaying phone caller identification, shopping application
    • H04N21/4788—Supplemental services, e.g. displaying phone caller identification, shopping application communicating with other users, e.g. chatting
    • 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]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/61—Network physical structure; Signal processing
    • H04N21/6106—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network
    • H04N21/6125—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network involving transmission via Internet
    • 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]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/643—Communication protocols
    • H04N21/64322—IP
    • 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]
    • H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
    • H04N21/85—Assembly of content; Generation of multimedia applications
    • H04N21/854—Content authoring
    • H04N21/8547—Content authoring involving timestamps for synchronizing content

Definitions

  • the embodiments of the present invention relate to an interactive network television (IPTV) technology, and in particular, to a playback synchronization control method, apparatus, and system in a video recommendation service.
  • IPTV interactive network television
  • IPTV is a kind of video media service business. With the continuous maturity of technology and the deepening of business, the number of users continues to increase, and IPTV technology is also developing.
  • the friend recommendation function is created when the user interaction is improved. In the friend recommendation function, the user can push the video content information being viewed to other friends through the IPTV system, and other friend users have the video content to watch. In the case of permission, the video is directly viewed through the push message sent by the system.
  • the indexing and navigation of various services provided by IPTV is done through the Electronic Program Guide (EPG) system.
  • EPG Electronic Program Guide
  • the interface of the IPTV EPG system is similar to that of the Web page.
  • various types of menus, buttons, links, etc. are available for users to directly select when they select a program.
  • the interface of the EPG system can also include various types for users to browse. Dynamic or static multimedia content.
  • the user when the recommended user views the video content recommended by the recommended user, the user can only start watching from the time recommended by the recommended user. If the push process of the video content takes too long, the guaranteed content cannot be guaranteed.
  • the synchronous push of the video content between the recommended user and the recommended user is recommended, so that the recommended user and the recommended user cannot simultaneously watch.
  • the recommended user Especially after recommending the user to perform video control (such as fast forward, fast rewind, etc.), the recommended user cannot perform real-time synchronization operation, so that the push of the video content between the recommended user and the recommended user is not synchronized, resulting in the recommended user and Recommended users are not able to watch simultaneously. Summary of the invention
  • An embodiment of the present invention provides a method for playing synchronization control in a video recommendation service, where the method includes:
  • the synchronization server receives the playback progress information in the playback process of the recommended video by the master terminal and the controlled terminal.
  • the playback progress information includes a system timestamp, and is configured to identify the system time when the playback progress information is sent.
  • the synchronization server calculates, according to the playback progress information reported by the master terminal, the current playback time point of the recommended video by the master terminal, and includes the playback progress of the current video playback time point of the recommended video by the master terminal.
  • the information is sent to the controlled party terminal.
  • the method further includes: the synchronization server establishing the terminal including the master terminal A synchronization group with the controlled party terminal, and the information of the synchronization group is sent to the master terminal and the controlled party terminal.
  • the synchronization server sends the play progress information including the current video playback time point of the master terminal to the controlled party terminal, where: the synchronization server reports the real-time terminal according to the master terminal and the controlled terminal.
  • the playing progress information is used to determine that the playing error between the master terminal and the controlled party terminal exceeds the preset synchronous play control threshold, and then the playing progress information including the current video playing time point of the master terminal is sent to the received The prosecution terminal.
  • the determining, according to the playback progress information reported by the master terminal and the controlled party terminal, the play error between the master terminal and the controlled terminal exceeds a preset synchronous play control threshold. including: Calculating, according to the playing progress information reported by the master terminal, the current playing time point of the recommended video by the master terminal;
  • the play progress information includes: an identifier of the recommended video, a video play time point, a synchronization group identifier, and a system timestamp; wherein, the video play time point is configured to identify the master terminal or control
  • the current playback time point of the video is recommended, or is configured to identify the current playback time point of the recommended video by the master terminal when the playback progress information is sent to the controlled terminal terminal; To identify the system time when the playback progress information is sent.
  • the embodiment of the present invention further provides a method for playing synchronization control in a video recommendation service, where the method includes: the controlled party terminal receives the playback progress information delivered by the synchronization server, and calculates the master terminal according to the playback progress information. The current playback progress, and adjusting the playback progress of the recommended video is consistent with the current playback progress of the master.
  • the controlled party terminal calculates the current playing progress of the master terminal according to the playing progress information, and adjusts the playing progress of the recommended video to be consistent with the current playing progress of the master, including: The controlled party terminal calculates a current playing time point of the recommended video by the master terminal according to the video playing time point and the system timestamp in the playing progress information, and displays the recommended video locally. Adjusted to the master terminal The current playback time point of the recommended video.
  • the embodiment of the present invention further provides a method for playing the synchronization control in the video recommendation service, where the method includes: the main controller terminal reports the playback progress information to the synchronization server in real time during the playback of the recommended video, where the playback progress information is Contains the system timestamp, configured to identify the system time when the playback progress information was sent.
  • the method further includes: the master controller terminal receiving the synchronization server is configured to include the master terminal and the controlled party terminal.
  • the information of the synchronization group that is sent after the synchronization group is sent to the controlled party terminal, and the information of the synchronization group is carried in the video recommendation request.
  • the embodiment of the present invention further provides a synchronization server configured to play the synchronization control in the video recommendation service, where the synchronization server includes: a receiving unit and a sending unit;
  • the receiving unit is configured to receive the playback progress information in the real-time playback process of the recommended video by the master terminal and the controlled terminal, where the playback progress information includes a system timestamp, and is configured to identify a system time when the playback progress information is sent. ;
  • a sending unit configured to calculate, according to the playing progress information of the master terminal, a current playing time point of the recommended video by the master terminal, and the current video of the recommended video is included by the master terminal
  • the playback progress information at the time point is sent to the controlled party terminal.
  • the synchronization server further includes: a determining unit, configured to determine, according to the playback progress information reported by the master terminal and the controlled terminal in real time, the master terminal and the controlled Notifying the sending unit that the playing error between the terminal terminals exceeds a preset synchronous play control threshold;
  • the sending unit is configured to: when receiving the notification of the determining unit, calculate, according to the playing progress information of the controlling terminal, a current playing time point of the recommended video by the master terminal, and include The master terminal sends the play progress information of the current video playback time point of the recommended video to the controlled party terminal.
  • the determining unit is configured to:
  • the synchronization server further includes: an establishing unit, configured to establish a synchronization group including the master terminal and the controlled party terminal, and send the information of the synchronization group to the master terminal And controlled party terminals.
  • the embodiment of the present invention further provides a controlled party terminal configured to play the synchronization control in the video recommendation service, where the controlled party terminal is configured to report the playback progress information to the synchronization server in real time during the playback of the recommended video.
  • the playback progress information includes a system timestamp, and is configured to identify a system time when the playback progress information is sent; and configured to receive playback progress information delivered by the synchronization server, and calculate a master terminal according to the playback progress information. current Play the progress, and adjust the playback progress of the recommended video to be consistent with the current playback progress of the master.
  • the play progress information includes: an identifier of the recommended video, a video play time point, a synchronization group identifier, and a system timestamp.
  • the video play time point is configured to identify the master terminal or the controlled party.
  • the terminal reports the playback progress information the current playback time point of the video is recommended, or is configured to identify the current playback time point of the recommended video by the master terminal when the playback progress information is sent to the controlled terminal terminal; Identifies the system time when the playback progress information is sent.
  • the embodiment of the present invention further provides a master terminal configured to play the synchronization control in the video recommendation service, where the master terminal is configured to report the playback progress information to the synchronization server in real time during the playback of the recommended video.
  • the playback progress information includes a system timestamp, and is configured to identify the system time when the playback progress information is sent.
  • the play progress information includes: an identifier of the recommended video, a video play time point, a synchronization group identifier, and a system timestamp.
  • the video play time point is configured to identify the master terminal or the controlled party.
  • the terminal reports the playback progress information the current playback time point of the video is recommended, or is configured to identify the current playback time point of the recommended video by the master terminal when the playback progress information is sent to the controlled terminal terminal; Identifies the system time when the playback progress information is sent.
  • the master terminal is further configured to receive the synchronization group information that is sent by the synchronization server after the synchronization group including the master terminal and the controlled party terminal is established, and send the information to the controlled terminal.
  • the embodiment of the present invention further provides a system configured to play the synchronization control in the video recommendation service, where the system includes a master terminal, a controlled party, and a synchronization server, where
  • the synchronization server includes: a receiving unit, a sending unit, and the receiving unit, configured to receive the real-time reporting progress of the master terminal and the controlled party during the playback of the recommended video.
  • the information, the play progress information includes a system timestamp, and is configured to identify a system time when the play progress information is sent;
  • the sending unit is configured to calculate, according to the play progress information of the master terminal, the master terminal Determining a current playing time point of the recommended video, and transmitting, to the controlled party terminal, the playing progress information of the current video playing time point of the recommended video by the master terminal;
  • the master terminal is configured to report playback progress information to the synchronization server in real time during the playback of the recommended video;
  • a controlled terminal configured to report playback progress information to the synchronization server in real time during playback of the recommended video; and configured to receive playback progress information delivered by the synchronization server, and calculate a master according to the playback progress information
  • the current playback progress of the controller terminal, and adjusting the playback progress of the recommended video is consistent with the current playback progress of the master controller.
  • the synchronization server further includes: an establishing unit, configured to establish a synchronization group including the master terminal and the controlled party terminal, and send the information of the synchronization group to the master terminal And controlled party terminals;
  • the master terminal is further configured to send a video recommendation request to the controlled party terminal, and carry the information of the synchronization group in the video recommendation request.
  • the play progress information includes: an identifier of the recommended video, a video play time point, a synchronization group identifier, and a system timestamp.
  • the video play time point is configured to identify the master terminal or the controlled party.
  • the terminal reports the playback progress information the current playback time point of the video is recommended, or is configured to identify the current playback time point of the recommended video by the master terminal when the playback progress information is sent to the controlled terminal terminal; Identify the playback progress information System time when sending.
  • the synchronization server further includes: a determining unit, configured to determine a play error between the master terminal and the controlled party terminal according to the play progress information reported by the master terminal and the controlled party terminal in real time If the preset synchronization play control threshold is exceeded, the sending unit is notified;
  • the sending unit is configured to: when receiving the notification of the determining unit, calculate, according to the playing progress information of the controlling terminal, a current playing time point of the recommended video by the master terminal, and include The master terminal sends the play progress information of the current video playback time point of the recommended video to the controlled party terminal.
  • the determining unit is configured to: calculate, according to the playing progress information of the master terminal received by the receiving unit, a current playing time point of the recommended video by the master terminal;
  • the playback progress information of the master controller terminal and the controlled party terminal are obtained in real time, and the master terminal is calculated according to the playback progress information reported by the master controller terminal.
  • the effect of the network delay on the playback synchronization accuracy during the reporting and delivery process is reduced, and the controlled terminal can obtain the current playback time point of the master terminal in real time and perform accurate playback progress adjustment to solve the existing
  • the IPTV friend recommendation function cannot implement the problem of synchronous playback control of the video content between the recommended user and the recommended user, so that the recommended user and the recommended user can simultaneously watch the same video content.
  • FIG. 1 is a schematic diagram of an implementation of a playback synchronization control method in a video recommendation service according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of a playback synchronization control system in a video recommendation service according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a specific implementation process of play synchronization control in a video recommendation service according to an embodiment of the present invention. detailed description
  • Step 101 The synchronization server receives the playback progress information in real time during the playback of the recommended video by the master terminal and the controlled party terminal, where the playback progress information includes a system timestamp, and is configured to identify the system time when the playback progress information is sent. ;
  • Step 102 The synchronization server calculates, according to the playback progress information reported by the master terminal, the current playing time point of the recommended video by the master terminal, and includes the current video playing time of the recommended video by the master terminal.
  • the playback progress information is sent to the controlled party terminal;
  • the synchronization server determines, according to the playback progress information reported by the master terminal and the controlled party terminal in real time, that the playback error between the master terminal and the controlled party terminal exceeds a preset
  • the step play control threshold is sent to the controlled party terminal for playing progress progress information including the current video playback time point of the master terminal.
  • the current playing time point of the recommended video by the master terminal is calculated according to the playing progress information reported by the master terminal; and the recommended terminal is calculated according to the playing progress information reported by the controlled terminal
  • the current playing time point of the video; the difference between the current playing time point of the recommended video by the master terminal and the current playing time point of the recommended video by the controlled party terminal, and the master terminal and the received terminal Playing error between the controller terminals; comparing the playback error between the master terminal and the controlled terminal with a preset synchronization play control threshold, and determining the master terminal and the controlled terminal Whether the play error between the two exceeds the preset sync play control threshold.
  • Step 103 The controlled party terminal receives the play progress information delivered by the synchronization server, calculates the current play progress of the master terminal according to the play progress information, and adjusts the play progress of the recommended video and the current status of the master party. The playback progress is consistent.
  • the controlled party terminal calculates, according to the video playing time point and the system timestamp in the playing progress information, a current playing time point of the recommended video by the master terminal, and the recommended video is The local playing progress is adjusted to the current playing time point of the recommended video by the master terminal.
  • the method may further include:
  • Step 100 The master terminal establishes a synchronization group including the master terminal and the controlled party terminal, and sends a video recommendation request to the controlled party terminal, and carries the information of the synchronization group in the video recommendation request. .
  • the embodiment of the present invention further provides a synchronization server configured to play synchronization control in a video recommendation service
  • the synchronization server includes: a receiving unit and a sending unit; wherein, the receiving unit is configured to receive the master terminal And the controlled party terminal reports the play progress information in real time during the playing process of the recommended video, where the play progress information includes the system timestamp, and is configured as a standard The system time when the play progress information is sent; the sending unit is configured to calculate, according to the play progress information of the master terminal, the current play time point of the recommended video by the master terminal, and include the master party The terminal sends the play progress information of the current video playing time point of the recommended video to the controlled party terminal.
  • the synchronization server further includes: a determining unit, configured to determine, according to the playback progress information reported by the master terminal and the controlled party terminal in real time, that the playback error between the master terminal and the controlled terminal exceeds a preset And the sending unit is configured to notify the sending unit; the sending unit is configured to: when receiving the notification of the determining unit, calculate the master terminal according to the playing progress information of the controlling terminal The current playback time point of the recommended video is sent to the controlled party terminal, where the playback progress information of the current video playback time point of the recommended video is included by the master terminal.
  • the determining unit is configured to: calculate, according to the play progress information of the master terminal received by the receiving unit, a current playing time point of the recommended video by the master terminal; receive according to the receiving unit The playing progress information of the controlled party terminal is calculated, and the current playing time point of the recommended video by the controlled party terminal is calculated; the current playing time point of the recommended video by the master controlling terminal is opposite to the controlled party terminal The difference between the current playback time points of the recommended video, the playback error between the master terminal and the controlled party terminal; the playback error between the master terminal and the controlled party terminal and the preset
  • the synchronization play control threshold is compared to determine whether the playback error between the master terminal and the controlled party terminal exceeds a preset synchronization play control threshold.
  • the embodiment of the present invention further provides a controlled party terminal configured to play synchronization control in a video recommendation service, where the controlled party terminal is configured to report playback progress information to the synchronization in real time during the playback of the recommended video.
  • the server the play progress information includes a system timestamp, and is configured to identify a system time when the play progress information is sent; and configured to receive play progress information delivered by the synchronization server, and calculate a master according to the play progress information.
  • Controller terminal The current playback progress, and adjusting the playback progress of the recommended video is consistent with the current playback progress of the master.
  • the embodiment of the present invention further provides a master terminal configured to play the synchronization control in the video recommendation service, where the master terminal is configured to report the playback progress information to the synchronization in the playback process of the recommended video.
  • the server, the play progress information includes a system timestamp, and is configured to identify a system time when the play progress information is sent.
  • the master terminal is further configured to receive the synchronization group information that is sent by the synchronization server after the synchronization group including the master terminal and the controlled party terminal is established, and send the video recommendation to the controlled party terminal. Requesting, and carrying the information of the synchronization group in the video recommendation request.
  • the embodiment of the present invention further provides a system for playing synchronization control in a video recommendation service, where the system includes the above-mentioned master terminal, the above-mentioned controlled party, and the above-mentioned synchronization server.
  • the controlled party terminal is configured to calculate, according to the video playing time point and the system timestamp in the playing progress information, a current playing time point of the recommended video by the master terminal, and the recommended The local playback progress of the video is adjusted to the current playback time point of the recommended video by the master terminal.
  • the playing progress information in the embodiment of the present invention may include: the identifier of the recommended video, the video playing time point, the synchronization group identifier, and the system timestamp; wherein, the video playing time point is configured to identify the master terminal or control When the terminal terminal reports the playback progress information, the current playback time point of the video is recommended, or is configured to identify the current playback time point of the recommended video by the master terminal when the playback progress information is sent to the controlled terminal terminal; To identify the system time when the playback progress information is sent.
  • This embodiment provides a playback synchronization control system in a video recommendation service.
  • the composition of the video synchronization service is as shown in FIG. 2, and may mainly include a master terminal, a controlled party terminal, an EPG device, and a synchronization service. Server.
  • the master terminal and the controlled party terminal log in to the IPTV system through the EPG device, and the master terminal is configured to initiate a video recommendation request when the video is played, and the controlled party terminal is configured to play when receiving the video recommendation request.
  • the video recommended by the master terminal; the synchronization server is configured to control the synchronous playback of the recommended video between the master terminal and the controlled party terminal, so that the master terminal is consistent with the progress of playing the recommended video by the controlled terminal.
  • FIG. 3 a specific implementation process of the play synchronization control in the video recommendation service is as shown in FIG. 3, and includes the following steps:
  • Step 301 The terminal A logs in to the IPTV system, acquires a video stream, and plays a video to the user.
  • Step 302 In the process of playing the video, the terminal A initiates a video recommendation request to the terminal B of another user based on the setting of the user.
  • the video recommendation request includes information such as the identifier of the terminal B, the identifier of the recommended video, and the current playback progress.
  • Step 303 The EPG receives the video recommendation request sent by the terminal A, notifies the synchronization server to create a synchronization group, and includes the identifier of the terminal A as the recommender, the identifier of the recommended video, and the current playback progress in the notification request. And other information.
  • Step 304 The synchronization server receives the notification sent by the EPG, and locally establishes a synchronization group with the terminal A as the master, the synchronization group including the identity of the synchronization group itself, the identity of the master terminal, the identifier of the recommended video, and the current Playing the progress and other information; after the synchronization server establishes the synchronization group, the related information of the synchronization group is returned to the EPG;
  • Step 305 After the terminal B logs in to the IPTV system through the EPG, the EPG sends a video recommendation request to the terminal B, where the video recommendation request carries the information about the synchronization group returned by the synchronization server.
  • Step 306 The terminal B receives the video recommendation request sent by the EPG, and rejects the video recommendation request based on the setting of the user, and ends the current process.
  • the terminal B may prompt the user. Whether to accept the video recommendation request, such as prompting "whether to receive the recommended video", the user can perform operations on the terminal B according to the prompt (such as selecting a function key to accept or reject), and the terminal B rejects when the user B selects the rejection.
  • the video recommendation request ends the current process.
  • the terminal B accepts the video recommendation request.
  • Step 307 The terminal B accepts the video recommendation request, and sends a request for accepting synchronous play to the synchronization server.
  • the terminal B accepts the video recommendation request. After that, the terminal B can also prompt the user whether to accept the video synchronous play, and return the acceptance response to the synchronization server when the user chooses to accept the video synchronous play; otherwise, end the recommended video synchronization process and enter the free viewing mode.
  • Step 308 The synchronization server receives the request for receiving the synchronous play sent by the terminal B, adds the terminal B to the synchronization group with the terminal A as the master, and sets the terminal B as the controlled party.
  • the synchronization server adds the identifier of the terminal B and the identifier indicating that the terminal B is the controlled party to the synchronization group in which the terminal A is the master.
  • Step 309 The synchronization server sends the current playback progress information of the terminal A to the terminal B.
  • Step 310 The terminal B acquires the video stream of the recommended video and plays the recommended video, and adjusts according to the current playback progress information of the terminal A. Recommended playback progress of the video.
  • the terminal B adjusts the playing progress of the recommended video to be consistent with the current playing progress of the terminal A.
  • Step 311 The terminal B periodically reports the playback progress information of the recommended video to the synchronization server, and the terminal A also periodically reports the playback progress information of the recommended video to the synchronization server.
  • Step 312 The synchronization server compares the playback progress of the recommended video with the playback progress of the terminal B, and determines whether the playback error between the two exceeds the preset synchronous playback control threshold (can be pre-configured according to actual needs, for example , can be 100 milliseconds), if yes, then Continue to step 313; otherwise, continue with this step or return to step 311;
  • the preset synchronous playback control threshold can be pre-configured according to actual needs, for example , can be 100 milliseconds
  • Step 313 The synchronization server sends the playback progress information reported by the terminal A to the terminal B.
  • Step 315 The terminal B actively ends the playback of the recommended video or logs out of the IPTV system, and the synchronous viewing process of the terminal B ends, and the video playback of the master terminal A and the synchronization group related information are not affected;
  • Step 316 The terminal A ends the playing of the recommended video, and sends the indication information of the end of the playing to the synchronization server.
  • Step 317 The synchronization server receives the indication information of the end of the playback of the terminal A, and cancels the corresponding synchronization group from the local, that is, the related information of the synchronization group with the terminal A as the master is deleted from the local, and the synchronization control is ended.
  • Step 318 When the terminal B reports the playback progress information to the synchronization server next time, the synchronization server returns the information of the synchronization group logout, and the system may prompt whether to continue playing the video, such as prompting “the synchronization control has ended, whether to continue playing the video”, if the user If "Yes” is selected, the terminal B continues to play the video and is no longer controlled by the synchronization; if the user selects "No", the terminal B ends the video playback.
  • the play progress information may include a recommended video identifier, a video play time point, a system timestamp, synchronization system information, and other attribute information (optional), as shown in Table 1.
  • the "video playback time point” identifies the current playback time point of the recommended video when the terminal reports to the synchronization server; or the playback time point that needs to be adjusted when the synchronization server delivers the terminal to the terminal;
  • the "system timestamp” identifies the current system time snapshot when the playback progress information is reported;
  • the "synchronization system information” identifies the home synchronization system information of the master, such as the identity of the synchronization group, etc., and the controlled party can according to the "synchronization system information" To choose whether to join the sync group.
  • the synchronization server includes the calculated current playback progress of the terminal A as the "video playback time point" in the playback progress information, and the terminal B receives the playback progress information sent by the synchronization server.
  • the current playing progress of the terminal A can be calculated based on the foregoing method, and then the local playing progress of the recommended video is adjusted to be consistent with the current playing progress of the terminal A.
  • the playback progress information includes the "system current timestamp", which can avoid the accuracy of playback synchronization due to network delay during reporting and delivery.
  • the information of the synchronization group may include the identifier of the synchronization group itself, the identifier of the master terminal, the identifier of the recommended video, the current playback progress, and other attribute information (optional), as shown in Table 2.
  • the "current playback progress” indicates the playback progress information recently reported by the master terminal.
  • the "other attribute information (optional)" may include information such as the identifier of the user to which the synchronization group belongs, the synchronization error threshold, etc., to facilitate further expansion of the system.
  • the fast forward and fast reverse operations are relatively complicated.
  • the terminal does not report the playback progress information, but fast forward or fast.
  • the playback progress information is reported to the synchronization server, thereby simplifying the control mode of fast forward and rewind.
  • the controlled party terminal ends the video playback by itself, the synchronization control of the video playback is also terminated accordingly.
  • the terminal A or the terminal B may be a terminal device in an IPTV system such as a set-top box, and the controlled terminal B may be multiple and added to the synchronization group of the master terminal A. Synchronized viewing;
  • the specific implementation process of multiple controlled party terminals is similar to the above process, and will not be described again.

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Abstract

本发明实施例公开了一种视频推荐业务中播放同步控制的方法，所述方法包括：同步服务器接收主控方终端与受控方终端在推荐视频的播放过程中实时上报播放进度信息；同步服务器根据主控方终端上报的播放进度信息计算得到主控方终端对所述推荐视频的当前播放时间点，并将包含主控方终端对所述推荐视频的当前视频播放时间点的播放进度信息下发给受控方终端；受控方终端根据所述播放进度信息计算得到主控方终端当前的播放进度，并调整推荐视频的播放进度与所述主控方当前的播放进度一致。本发明实施例还公开了一种配置为视频推荐业务中播放同步控制的同步服务器和系统，实现了视频播放的同步控制。

Description

一种视频推荐业务中播放同步控制方法及装置、 系统 技术领域
本发明实施例涉及交互式网络电视（ IPTV )技术， 尤其涉及一种视频 推荐业务中播放同步控制方法及装置、 系统。 背景技术
IPTV是一种视频传媒服务业务， 随着技术的不断成熟和业务的深入开 展， 其用户数在持续增加， IPTV技术也在不断发展。 好友推荐功能， 是在 提高用户互动的情况下应运而生， 在好友推荐功能中， 用户可以将正在观 看的视频内容信息， 通过 IPTV系统推送给其他好友用户， 其他好友用户在 拥有该视频内容观看权限的情况下， 通过系统下发的推送消息直接进行视 频观看。
IPTV所提供的各种业务的索引及导航都是通过电子节目菜单（EPG， Electronic Program Guide )系统来完成的。 IPTV EPG系统的界面与 Web页 面类似， 在 EPG系统界面上一般都提供各类菜单、 按钮、 链接等可供用户 选择节目时直接点击的组件； EPG 系统的界面上也可以包含各类供用户浏 览的动态或静态的多媒体内容。
目前， IPTV的好友推荐功能中， 被推荐用户观看推荐用户所推荐的视 频内容时， 只能从推荐用户所推荐的时间点开始观看， 如果视频内容的推 送过程耗时过长， 则无法保证被推荐用户与推荐用户之间视频内容的同步 推送， 导致被推荐用户与推荐用户不能够进行同步观看。 尤其是在推荐用 户进行视频控制 （如快进、 快退等）后， 被推荐用户不能进行实时的同步 操作， 使得被推荐用户与推荐用户之间视频内容的推送不同步， 导致被推 荐用户与推荐用户不能够进行同步观看。 发明内容
有鉴于此， 本发明实施例的主要目的在于提供一种视频推荐业务中播 放同步控制方法及装置、 系统， 以解决现有的 IPTV好友推荐功能中不能实 现被推荐用户与推荐用户之间视频内容同步播放控制的问题。
为达到上述目的， 本发明实施例的技术方案是这样实现的：
本发明实施例提供了一种视频推荐业务中播放同步控制的方法， 所述 方法包括：
同步服务器接收主控方终端与受控方终端在推荐视频的播放过程中实 时上报播放进度信息， 所述播放进度信息中包含系统时间戳， 配置为标识 播放进度信息发送时的系统时间；
同步服务器根据主控方终端上报的播放进度信息计算得到主控方终端 对所述推荐视频的当前播放时间点， 并将包含主控方终端对所述推荐视频 的当前视频播放时间点的播放进度信息下发给受控方终端。
在上述方案中， 所述同步服务器接收主控方终端与受控方终端在推荐 视频的播放过程中实时上报播放进度信息之前， 所述方法还包括： 同步服 务器建立包括有所述主控方终端与受控方终端的同步组， 并将该同步组的 信息下发给主控方终端和受控方终端。
在上述方案中， 所述同步服务器将包含主控方终端当前视频播放时间 点的播放进度信息下发给受控方终端， 为： 同步服务器根据所述主控方终 端与受控方终端实时上报的播放进度信息， 判断主控方终端与受控方终端 之间的播放误差超过了预设的同步播放控制阈值， 则将包含主控方终端当 前视频播放时间点的播放进度信息下发给受控方终端。
在上述方案中， 所述根据所述主控方终端与受控方终端实时上报的播 放进度信息， 判断主控方终端与受控方终端之间的播放误差超过了预设的 同步播放控制阈值， 包括： 根据主控方终端上报的播放进度信息计算得到主控方终端对所述推荐 视频的当前播放时间点；
根据受控方终端上报的播放进度信息计算得到受控方终端对所述推荐 视频的当前播放时间点；
由所述主控方终端对推荐视频的当前播放时间点与所述受控方终端对 推荐视频的当前播放时间点之间的差值， 得到主控方终端与受控方终端之 间的播放误差；
将所述主控方终端与受控方终端之间的播放误差与预设的同步播放控 制阈值进行比较， 判断所述主控方终端与受控方终端之间的播放误差是否 超过了预设的同步播放控制阈值。
在上述方案中， 所述播放进度信息包括： 所述推荐视频的标识、 视频 播放时间点、 同步组标识和系统时间戳； 其中， 视频播放时间点配置为标 识所述主控方终端或受控方终端上报播放进度信息时推荐视频的当前播放 时间点， 或者配置为标识下发播放进度信息给受控方终端时主控方终端对 所述推荐视频的当前播放时间点； 系统时间戳， 配置为标识播放进度信息 发送时的系统时间。
本发明实施例还提供了一种视频推荐业务中播放同步控制的方法， 所 述方法包括： 受控方终端接收同步服务器下发的播放进度信息， 根据所述 播放进度信息计算得到主控方终端当前的播放进度， 并调整推荐视频的播 放进度与所述主控方当前的播放进度一致。
在上述方案中， 所述受控方终端根据所述播放进度信息计算得到主控 方终端当前的播放进度， 并调整推荐视频的播放进度与所述主控方当前的 播放进度一致， 包括： 所述受控方终端根据所述播放进度信息中的视频播 放时间点和系统时间戳， 计算得到主控方终端对所述推荐视频的当前播放 时间点， 并将所述推荐视频在本地的播放进度调整到所述主控方终端对所 述推荐视频的当前播放时间点。
本发明实施例还提供了一种视频推荐业务中播放同步控制的方法， 所 述方法包括： 主控方终端在推荐视频的播放过程中实时上报播放进度信息 给同步服务器， 所述播放进度信息中包含系统时间戳， 配置为标识播放进 度信息发送时的系统时间。
在上述方案中， 所述主控方终端实时上报播放进度信息给同步服务器 之前， 所述方法还包括： 主控方终端接收同步服务器在建立包括有所述主 控方终端与受控方终端的同步组后下发的同步组的信息， 向所述受控方终 端发送视频推荐请求， 并在所述视频推荐请求中携带所述同步组的信息。
本发明实施例还提供了一种配置为视频推荐业务中播放同步控制的同 步服务器， 所述同步服务器包括： 接收单元、 下发单元； 其中，
接收单元， 配置为接收主控方终端与受控方终端在推荐视频的播放过 程中实时上报播放进度信息， 所述播放进度信息中包含系统时间戳， 配置 为标识播放进度信息发送时的系统时间；
下发单元， 配置为根据所述主控方终端的播放进度信息计算得到主控 方终端对所述推荐视频的当前播放时间点， 并将包含主控方终端对所述推 荐视频的当前视频播放时间点的播放进度信息下发给受控方终端。
上述方案中， 所述播放进度信息包括： 所述推荐视频的标识、 视频播 放时间点、 同步组标识和系统时间戳； 其中， 视频播放时间点配置为标识 所述主控方终端或受控方终端上报播放进度信息时推荐视频的当前播放时 间点， 或者配置为标识下发播放进度信息给受控方终端时主控方终端对所 述推荐视频的当前播放时间点； 系统时间戳， 配置为标识播放进度信息发 送时的系统时间。
上述方案中， 所述同步服务器还包括： 判断单元， 配置为根据所述主 控方终端与受控方终端实时上报的播放进度信息， 判断主控方终端与受控 方终端之间的播放误差超过了预设的同步播放控制阈值， 则通知所述下发 单元；
所述下发单元， 配置为在接收到所述判断单元的通知时， 根据所述主 控方终端的播放进度信息计算得到主控方终端对所述推荐视频的当前播放 时间点， 并将包含主控方终端对所述推荐视频的当前视频播放时间点的播 放进度信息下发给受控方终端。
上述方案中， 所述判断单元， 配置为：
根据所述接收单元接收的主控方终端的播放进度信息， 计算得到主控 方终端对所述推荐视频的当前播放时间点；
根据所述接收单元接收的受控方终端的播放进度信息， 计算得到受控 方终端对所述推荐视频的当前播放时间点；
由所述主控方终端对推荐视频的当前播放时间点与所述受控方终端对 推荐视频的当前播放时间点之间的差值， 得到主控方终端与受控方终端之 间的播放误差；
将所述主控方终端与受控方终端之间的播放误差与预设的同步播放控 制阈值进行比较， 判断所述主控方终端与受控方终端之间的播放误差是否 超过了预设的同步播放控制阈值。
上述方案中， 所述同步服务器还包括： 建立单元， 配置为建立包括有 所述主控方终端与受控方终端的同步组， 并将该同步组的信息下发给所述 主控方终端和受控方终端。
本发明实施例还提供了一种配置为视频推荐业务中播放同步控制的受 控方终端， 所述受控方终端， 配置为在推荐视频的播放过程中实时上报播 放进度信息给同步服务器， 所述播放进度信息中包含系统时间戳， 配置为 标识播放进度信息发送时的系统时间； 以及， 配置为接收所述同步服务器 下发的播放进度信息， 根据所述播放进度信息计算得到主控方终端当前的 播放进度， 并调整推荐视频的播放进度与所述主控方当前的播放进度一致。 上述方案中， 所述播放进度信息包括： 所述推荐视频的标识、 视频播 放时间点、 同步组标识和系统时间戳； 其中， 视频播放时间点配置为标识 所述主控方终端或受控方终端上报播放进度信息时推荐视频的当前播放时 间点， 或者配置为标识下发播放进度信息给受控方终端时主控方终端对所 述推荐视频的当前播放时间点； 系统时间戳， 配置为标识播放进度信息发 送时的系统时间。
本发明实施例又提供了一种配置为视频推荐业务中播放同步控制的主 控方终端， 所述主控方终端， 配置为在推荐视频的播放过程中实时上报播 放进度信息给同步服务器， 所述播放进度信息中包含系统时间戳， 配置为 标识播放进度信息发送时的系统时间。
上述方案中， 所述播放进度信息包括： 所述推荐视频的标识、 视频播 放时间点、 同步组标识和系统时间戳； 其中， 视频播放时间点配置为标识 所述主控方终端或受控方终端上报播放进度信息时推荐视频的当前播放时 间点， 或者配置为标识下发播放进度信息给受控方终端时主控方终端对所 述推荐视频的当前播放时间点； 系统时间戳， 配置为标识播放进度信息发 送时的系统时间。
上述方案中， 主控方终端， 还配置为接收同步服务器在建立包括有所 述主控方终端与受控方终端的同步组后下发的所述同步组的信息， 向受控 方终端发送视频推荐请求， 并在所述视频推荐请求中携带所述同步组的信 息。
本发明实施例又提供了一种配置为视频推荐业务中播放同步控制的系 统， 所述系统包括主控方终端、 受控方终端和同步服务器， 其中，
所述同步服务器包括： 接收单元、 下发单元； 所述接收单元， 配置为 接收主控方终端与受控方终端在推荐视频的播放过程中实时上报播放进度 信息， 所述播放进度信息中包含系统时间戳， 配置为标识播放进度信息发 送时的系统时间； 下发单元， 配置为根据所述主控方终端的播放进度信息 计算得到主控方终端对所述推荐视频的当前播放时间点， 并将包含主控方 终端对所述推荐视频的当前视频播放时间点的播放进度信息下发给受控方 终端；
主控方终端， 配置为在推荐视频的播放过程中实时上报播放进度信息 给所述同步服务器；
受控方终端， 配置为在推荐视频的播放过程中实时上报播放进度信息 给所述同步服务器； 以及， 配置为接收所述同步服务器下发的播放进度信 息， 根据所述播放进度信息计算得到主控方终端当前的播放进度， 并调整 推荐视频的播放进度与所述主控方当前的播放进度一致。
上述方案中， 所述同步服务器还包括： 建立单元， 配置为建立包括有 所述主控方终端与受控方终端的同步组， 并将该同步组的信息下发给所述 主控方终端和受控方终端；
主控方终端， 还配置为向受控方终端发送视频推荐请求， 并在所述视 频推荐请求中携带所述同步组的信息。
上述方案中， 所述受控方终端， 配置为根据所述播放进度信息中的视 频播放时间点和系统时间戳， 计算得到主控方终端对所述推荐视频的当前 播放时间点， 并将所述推荐视频在本地的播放进度调整到所述主控方终端 对所述推荐视频的当前播放时间点。
上述方案中， 所述播放进度信息包括： 所述推荐视频的标识、 视频播 放时间点、 同步组标识和系统时间戳； 其中， 视频播放时间点配置为标识 所述主控方终端或受控方终端上报播放进度信息时推荐视频的当前播放时 间点， 或者配置为标识下发播放进度信息给受控方终端时主控方终端对所 述推荐视频的当前播放时间点； 系统时间戳， 配置为标识播放进度信息发 送时的系统时间。
上述方案中， 所述同步服务器还包括： 判断单元， 配置为根据所述主 控方终端与受控方终端实时上报的播放进度信息， 判断主控方终端与受控 方终端之间的播放误差超过了预设的同步播放控制阈值， 则通知所述下发 单元；
所述下发单元， 配置为在接收到所述判断单元的通知时， 根据所述主 控方终端的播放进度信息计算得到主控方终端对所述推荐视频的当前播放 时间点， 并将包含主控方终端对所述推荐视频的当前视频播放时间点的播 放进度信息下发给受控方终端。
上述方案中， 所述判断单元， 配置为： 根据所述接收单元接收的主控 方终端的播放进度信息， 计算得到主控方终端对所述推荐视频的当前播放 时间点；
根据所述接收单元接收的受控方终端的播放进度信息， 计算得到受控 方终端对所述推荐视频的当前播放时间点；
由所述主控方终端对推荐视频的当前播放时间点与所述受控方终端对 推荐视频的当前播放时间点之间的差值， 得到主控方终端与受控方终端之 间的播放误差；
将所述主控方终端与受控方终端之间的播放误差与预设的同步播放控 制阈值进行比较， 判断所述主控方终端与受控方终端之间的播放误差是否 超过了预设的同步播放控制阈值。
本发明实施例的视频推荐业务中播放同步控制方法及装置、 系统， 实 时获取主控方终端与受控方终端的播放进度信息， 根据主控方终端上报的 播放进度信息计算得到主控方终端对所述推荐视频的当前播放时间点， 并 将包含主控方终端对所述推荐视频的当前视频播放时间点的播放进度信息 下发给受控方终端， 受控方终端接收所述同步服务器下发的播放进度信息， 根据所述播放进度信息计算得到主控方终端当前的播放进度， 并调整推荐 视频的播放进度与所述主控方当前的播放进度一致， 在上报和下发的进度 信息中， 增加系统时间戳， 减小上报和下发过程中由于网络延时对播放同 步精度的影响， 并使得受控方终端能够实时获知主控方终端的当前播放时 间点并进行精确的播放进度调整，解决现有的 IPTV好友推荐功能中不能实 现被推荐用户与推荐用户之间视频内容同步播放控制的问题， 使得推荐用 户与被推荐用户能够同步观看同一视频内容。 附图说明
图 1为本发明实施例视频推荐业务中播放同步控制方法的实现示意图； 图 2 为本发明实施例中视频推荐业务中播放同步控制系统的组成结构 示意图；
图 3 为本发明实施例中视频推荐业务中播放同步控制的具体实现流程 示意图。 具体实施方式
如图 1 所示， 本发明实施例的视频推荐业务中播放同步控制方法主要 可以包括如下的步骤：
步骤 101 : 同步服务器接收主控方终端与受控方终端在推荐视频的播放 过程中实时上报播放进度信息， 所述播放进度信息中包含系统时间戳， 配 置为标识播放进度信息发送时的系统时间；
步骤 102: 同步服务器根据主控方终端上报的播放进度信息计算得到主 控方终端对所述推荐视频的当前播放时间点， 并将包含主控方终端对所述 推荐视频的当前视频播放时间点的播放进度信息下发给受控方终端；
这里， 同步服务器根据所述主控方终端与受控方终端实时上报的播放 进度信息， 判断主控方终端与受控方终端之间的播放误差超过了预设的同 步播放控制阈值， 则将包含主控方终端当前视频播放时间点的播放进度信 息下发给受控方终端。
具体地， 根据主控方终端上报的播放进度信息计算得到主控方终端对 所述推荐视频的当前播放时间点； 根据受控方终端上报的播放进度信息计 算得到受控方终端对所述推荐视频的当前播放时间点； 由所述主控方终端 对推荐视频的当前播放时间点与所述受控方终端对推荐视频的当前播放时 间点之间的差值， 得到主控方终端与受控方终端之间的播放误差； 将所述 主控方终端与受控方终端之间的播放误差与预设的同步播放控制阈值进行 比较， 判断所述主控方终端与受控方终端之间的播放误差是否超过了预设 的同步播放控制阈值。
步骤 103: 受控方终端接收所述同步服务器下发的播放进度信息，根据 所述播放进度信息计算得到主控方终端当前的播放进度， 并调整推荐视频 的播放进度与所述主控方当前的播放进度一致。
具体地， 所述受控方终端根据所述播放进度信息中的视频播放时间点 和系统时间戳， 计算得到主控方终端对所述推荐视频的当前播放时间点， 并将所述推荐视频在本地的播放进度调整到所述主控方终端对所述推荐视 频的当前播放时间点。
这里， 在步骤 101之前， 所述方法还可以包括：
步骤 100:主控方终端建立包括有所述主控方终端与受控方终端的同步 组， 向受控方终端发送视频推荐请求， 并在所述视频推荐请求中携带所述 同步组的信息。
相应的， 本发明实施例还提供了一种配置为视频推荐业务中播放同步 控制的同步服务器， 所述同步服务器包括： 接收单元和下发单元； 其中， 接收单元， 配置为接收主控方终端与受控方终端在推荐视频的播放过程中 实时上报播放进度信息， 所述播放进度信息中包含系统时间戳， 配置为标 识播放进度信息发送时的系统时间； 下发单元， 配置为根据所述主控方终 端的播放进度信息计算得到主控方终端对所述推荐视频的当前播放时间 点， 并将包含主控方终端对所述推荐视频的当前视频播放时间点的播放进 度信息下发给受控方终端。
所述同步服务器还包括： 判断单元， 配置为根据所述主控方终端与受 控方终端实时上报的播放进度信息， 判断主控方终端与受控方终端之间的 播放误差超过了预设的同步播放控制阈值， 则通知所述下发单元； 所述下 发单元， 配置为在接收到所述判断单元的通知时， 根据所述主控方终端的 播放进度信息计算得到主控方终端对所述推荐视频的当前播放时间点， 并 将包含主控方终端对所述推荐视频的当前视频播放时间点的播放进度信息 下发给受控方终端。
具体地， 所述判断单元， 配置为： 根据所述接收单元接收的主控方终 端的播放进度信息， 计算得到主控方终端对所述推荐视频的当前播放时间 点； 根据所述接收单元接收的受控方终端的播放进度信息， 计算得到受控 方终端对所述推荐视频的当前播放时间点； 由所述主控方终端对推荐视频 的当前播放时间点与所述受控方终端对推荐视频的当前播放时间点之间的 差值， 得到主控方终端与受控方终端之间的播放误差； 将所述主控方终端 与受控方终端之间的播放误差与预设的同步播放控制阈值进行比较， 判断 所述主控方终端与受控方终端之间的播放误差是否超过了预设的同步播放 控制阈值。
相应的， 本发明实施例还提供了一种配置为视频推荐业务中播放同步 控制的受控方终端， 所述受控方终端， 配置为在推荐视频的播放过程中实 时上报播放进度信息给同步服务器， 所述播放进度信息中包含系统时间戳， 配置为标识播放进度信息发送时的系统时间； 以及， 配置为接收所述同步 服务器下发的播放进度信息， 根据所述播放进度信息计算得到主控方终端 当前的播放进度， 并调整推荐视频的播放进度与所述主控方当前的播放进 度一致。
相应的， 本发明实施例还提供了一种配置为视频推荐业务中播放同步 控制的主控方终端， 所述主控方终端， 配置为在推荐视频的播放过程中实 时上报播放进度信息给同步服务器， 所述播放进度信息中包含系统时间戳， 配置为标识播放进度信息发送时的系统时间。
这里， 主控方终端， 还配置为接收同步服务器在建立包括有所述主控 方终端与受控方终端的同步组后下发的所述同步组的信息， 向受控方终端 发送视频推荐请求， 并在所述视频推荐请求中携带所述同步组的信息。
相应的， 本发明实施例还提供了一种视频推荐业务中播放同步控制的 系统， 所述系统包括上述的主控方终端、 上述的受控方终端和上述的同步 服务器。
这里， 所述受控方终端， 配置为根据所述播放进度信息中的视频播放 时间点和系统时间戳， 计算得到主控方终端对所述推荐视频的当前播放时 间点， 并将所述推荐视频在本地的播放进度调整到所述主控方终端对所述 推荐视频的当前播放时间点。
本发明实施例中的播放进度信息可以包括： 所述推荐视频的标识、 视 频播放时间点、 同步组标识和系统时间戳； 其中， 视频播放时间点配置为 标识所述主控方终端或受控方终端上报播放进度信息时推荐视频的当前播 放时间点， 或者配置为标识下发播放进度信息给受控方终端时主控方终端 对所述推荐视频的当前播放时间点； 系统时间戳， 配置为标识播放进度信 息发送时的系统时间。
实施例一
本实施例提供了一种视频推荐业务中播放同步控制系统， 其组成结构 如图 2所示， 主要可以包括主控方终端、 受控方终端、 EPG设备和同步服 务器。 其中， 主控方终端与受控方终端均通过所述 EPG设备登录 IPTV系 统， 主控方终端配置为在播放视频时发起视频推荐请求， 受控方终端配置 为在接受视频推荐请求时， 播放主控方终端推荐的视频； 同步服务器配置 为控制主控方终端与受控方终端之间推荐视频的同步播放， 使得主控方终 端与受控方终端播放推荐视频的进度相一致。
本实施例中， 视频推荐业务中播放同步控制的具体实现过程如图 3 所 示， 包括如下步骤：
步骤 301 : 终端 A登录 IPTV系统， 获取视频流， 并向用户播放视频； 步骤 302: 终端 A在播放视频的过程中， 基于用户的设置， 向另一用 户的终端 B发起视频推荐请求；
这里， 所述视频推荐请求中包含终端 B的标识、 推荐视频的标识、 以 及当前播放进度等信息。
步骤 303: EPG接收终端 A发出的视频推荐请求， 通知同步服务器创 建同步组， 并在该通知中包含所述视频推荐请求中作为推荐方的终端 A的 标识、 推荐视频的标识、 以及当前播放进度等信息。
步骤 304: 同步服务器接收 EPG发出的通知， 在本地建立一个以终端 A 为主控方的同步组， 所述同步组包含同步组自身的标识、 主控方终端的 标识、 推荐视频的标识以及当前播放进度等信息； 同步服务器建立所述同 步组后， 将该同步组的相关信息返回给 EPG;
步骤 305: 在终端 B通过 EPG登录到 IPTV系统后， EPG向终端 B发 送视频推荐请求， 该视频推荐请求中携带所述同步服务器返回的同步组的 相关信息；
步骤 306: 终端 B接收所述 EPG发送的视频推荐请求， 基于用户的设 置， 拒绝所述视频推荐请求， 结束当前流程；
实际应用中， 终端 B在接收到所述视频推荐请求后， 可以向用户提示 是否接受所述视频推荐请求， 如提示 "是否接收推荐视频"， 用户可以根据 该提示在终端 B上进行操作（如选择接受或拒绝的功能键等），终端 B在用 户 B选择拒绝时， 拒绝所述视频推荐请求， 结束当前流程。 在用户 B选择 接受时， 终端 B接受所述视频推荐请求。
步骤 307: 终端 B接受所述视频推荐请求， 向同步服务器发送接受同 步播放的请求；
这里， 在用户 B选择接受时， 终端 B接受所述视频推荐请求。 之后， 终端 B还可以向用户提示是否接受视频同步播放， 并在用户选择接受视频 同步播放时， 向同步服务器返回接受响应； 否则， 结束推荐视频同步流程， 进入自由观看模式。
步骤 308: 同步服务器接收终端 B发出的所述接受同步播放的请求， 将终端 B添加到以终端 A为主控方的所述同步组中， 并将所述终端 B设置 为受控方。
具体地， 同步服务器将终端 B的标识与表示终端 B为受控方的标识添 加到以终端 A为主控方的同步组中。
步骤 309: 同步服务器将终端 A的当前播放进度信息发送给终端 B; 步骤 310: 终端 B获取推荐视频的视频流并播放所述推荐视频， 根据 所述终端 A的当前播放进度信息， 调整所述推荐视频的播放进度。
具体地， 终端 B将推荐视频的播放进度调整为与终端 A当前播放进度 一致。
步骤 311 : 终端 B定时向同步服务器上报所述推荐视频的播放进度信 息， 终端 A也定时向同步服务器上报所述推荐视频的播放进度信息；
步骤 312: 同步服务器将推荐视频在终端 A的播放进度与终端 B的播 放进度进行比较， 判断两者之间的播放误差是否超过了预设的同步播放控 制阈值（可根据实际需要预先配置， 例如， 可以是 100毫秒）， 如果是， 则 继续步骤 313 ; 否则， 继续本步骤或返回步骤 311 ;
步骤 313: 同步服务器将终端 A上报的播放进度信息发送给终端 B; 步骤 314: 终端 B根据推荐视频在终端 A的播放进度信息， 调整所述 推荐视频在本地的播放进度，使得所述推荐视频在本地的播放进度与终端 A 的播放进度相一致。
步骤 315: 终端 B主动结束推荐视频的播放或登出 IPTV系统， 终端 B 的同步观看流程结束， 主控方终端 A的视频播放和同步组相关信息不受影 响；
步骤 316: 终端 A结束推荐视频的播放， 向同步服务器发送播放结束 的指示信息；
步骤 317: 同步服务器接收终端 A播放结束的指示信息， 将相应的同 步组从本地注销， 也就是说， 将以终端 A为主控方的同步组相关信息从本 地删除， 结束同步控制。
步骤 318: 终端 B在下次上报播放进度信息时给同步服务器时， 同步 服务器返回同步组注销的信息， 系统可提示是否继续播放视频，如提示 "同 步控制已结束， 是否继续播放视频"， 如果用户选择 "是"， 则终端 B继续 播放视频不再受同步控制； 如果用户选择 "否"， 则终端 B结束视频播放。
上述流程中， 所述播放进度信息可以包括推荐视频标识、 视频播放时 间点、 系统时间戳、 同步系统信息和其他属性信息（可选）， 具体如表 1所 。
Figure imgf000017_0001
表 1
其中， "视频播放时间点"标识了终端上报给同步服务器时推荐视频的 当前播放时间点； 或同步服务器下发给终端时指示需调整的播放时间点； "系统时间戳" 标识上报播放进度信息时当前的系统时间快照； "同步系统 信息" 标识了主控方的归属同步系统信息， 例如同步组的标识等， 受控方 可以根据 "同步系统信息" 来选择是否加入同步组。
同步服务器可以根据播放进度信息中的 "视频播放时间点" 和 "系统 时间戳" 以及当前系统时间， 分别计算得到终端 A和终端 B播放推荐视频 的当前播放进度， 具体计算如下： 当前播放进度 =视频播放时间点 +当前系 统时间-系统时间戳，再由终端 A和终端 B的当前播放进度之差得到终端 A 与终端 B之间的播放误差。 在向终端 B发送播放进度信息时， 同步服务器 将计算出的终端 A的当前播放进度作为 "视频播放时间点" 包含在所述播 放进度信息中， 终端 B接收到同步服务器发送的该播放进度信息时， 基于 上述方法可以计算终端 A的当前播放进度， 再将推荐视频在本地的播放进 度调整为与终端 A的当前播放进度一致。
在上述方案中， 播放进度信息中包含 "系统当前时间戳"， 可以避免上 报和下发过程中由于网络延时而影响播放同步的精度。
上述流程中， 所述同步组的信息可以包括同步组自身的标识、 主控方 终端的标识、 推荐视频的标识、 当前播放进度及其他属性信息（可选）， 具 体 ^口表 2所示。
Figure imgf000018_0001
表 2
其中， "当前播放进度" 表示主控方终端最近上报的播放进度信息。 其中， "其他属性信息（可选）"， 可以包含同步组所属用户的标识、 同 步误差阀值等信息， 方便系统的进一步扩展。
需要说明的是， 视频播放的同步控制过程中， 快进、 快退操作相对比 较复杂， 在这类操作过程中， 终端均不上报播放进度信息， 而在快进或快 退操作结束后， 上报播放进度信息给同步服务器， 从而简化快进快退的控 制方式。 受控方终端自行结束视频播放时， 视频播放的同步控制也相应的 终止。
需要说明的是， 上述的终端 A或终端 B具体可以是机顶盒等 IPTV系 统中的终端设备， 并且上述的受控方终端 B可以存在多个， 同时加入主控 方终端 A的同步组中， 实现同步观看； 这里， 多个受控方终端的具体实现 流程与上述流程相似， 不再赘述。
以上所述， 仅为本发明的较佳实施例而已， 并非用于限定本发明的保 护范围。

Claims

权利要求书
1、 一种视频推荐业务中播放同步控制的方法， 所述方法包括： 同步服务器接收主控方终端与受控方终端在推荐视频的播放过程中实 时上报播放进度信息， 所述播放进度信息中包含系统时间戳， 配置为标识 播放进度信息发送时的系统时间；
同步服务器根据主控方终端上报的播放进度信息计算得到主控方终端 对所述推荐视频的当前播放时间点， 并将包含主控方终端对所述推荐视频 的当前视频播放时间点的播放进度信息下发给受控方终端。
2、 根据权利要求 1所述视频推荐业务中播放同步控制的方法， 其中， 所述同步服务器接收主控方终端与受控方终端在推荐视频的播放过程中实 时上报播放进度信息之前， 所述方法还包括：
同步服务器建立包括有所述主控方终端与受控方终端的同步组， 并将 该同步组的信息下发给主控方终端和受控方终端。
3、 根据权利要求 1所述视频推荐业务中播放同步控制的方法， 其中， 所述同步服务器将包含主控方终端当前视频播放时间点的播放进度信息下 发给受控方终端， 为：
同步服务器根据所述主控方终端与受控方终端实时上报的播放进度信 息， 判断主控方终端与受控方终端之间的播放误差超过了预设的同步播放 控制阈值， 则将包含主控方终端当前视频播放时间点的播放进度信息下发 给受控方终端。
4、 根据权利要求 3所述视频推荐业务中播放同步控制的方法， 其中， 所述根据所述主控方终端与受控方终端实时上报的播放进度信息， 判断主 控方终端与受控方终端之间的播放误差超过了预设的同步播放控制阈值， 包括：
根据主控方终端上报的播放进度信息计算得到主控方终端对所述推荐 视频的当前播放时间点；
根据受控方终端上报的播放进度信息计算得到受控方终端对所述推荐 视频的当前播放时间点；
由所述主控方终端对推荐视频的当前播放时间点与所述受控方终端对 推荐视频的当前播放时间点之间的差值， 得到主控方终端与受控方终端之 间的播放误差；
将所述主控方终端与受控方终端之间的播放误差与预设的同步播放控 制阈值进行比较， 判断所述主控方终端与受控方终端之间的播放误差是否 超过了预设的同步播放控制阈值。
5、 根据权利要求 1至 4任一项所述视频推荐业务中播放同步控制的方 法， 其中， 所述播放进度信息包括： 所述推荐视频的标识、 视频播放时间 点、 同步组标识和系统时间戳； 其中， 视频播放时间点配置为标识所述主 控方终端或受控方终端上报播放进度信息时推荐视频的当前播放时间点， 或者配置为标识下发播放进度信息给受控方终端时主控方终端对所述推荐 视频的当前播放时间点； 系统时间戳， 配置为标识播放进度信息发送时的 系统时间。
6、 一种视频推荐业务中播放同步控制的方法， 所述方法包括： 受控方终端接收同步服务器下发的播放进度信息， 根据所述播放进度 信息计算得到主控方终端当前的播放进度， 并调整推荐视频的播放进度与 所述主控方当前的播放进度一致。
7、 根据权利要求 6所述视频推荐业务中播放同步控制的方法， 其中， 所述受控方终端根据所述播放进度信息计算得到主控方终端当前的播放进 度， 并调整推荐视频的播放进度与所述主控方当前的播放进度一致， 包括： 所述受控方终端根据所述播放进度信息中的视频播放时间点和系统时间 戳， 计算得到主控方终端对所述推荐视频的当前播放时间点， 并将所述推 荐视频在本地的播放进度调整到所述主控方终端对所述推荐视频的当前播 放时间点。
8、 一种视频推荐业务中播放同步控制的方法， 所述方法包括： 主控方终端在推荐视频的播放过程中实时上报播放进度信息给同步服 务器， 所述播放进度信息中包含系统时间戳， 配置为标识播放进度信息发 送时的系统时间。
9、 根据权利要求 8所述视频推荐业务中播放同步控制的方法， 其中， 所述主控方终端实时上报播放进度信息给同步服务器之前， 所述方法还包 括： 主控方终端接收同步服务器在建立包括有所述主控方终端与受控方终 端的同步组后下发的同步组的信息， 向所述受控方终端发送视频推荐请求， 并在所述视频推荐请求中携带所述同步组的信息。
10、 一种配置为视频推荐业务中播放同步控制的同步服务器， 所述同 步服务器包括： 接收单元、 下发单元； 其中，
接收单元， 配置为接收主控方终端与受控方终端在推荐视频的播放过 程中实时上报播放进度信息， 所述播放进度信息中包含系统时间戳， 配置 为标识播放进度信息发送时的系统时间；
下发单元， 配置为根据所述主控方终端的播放进度信息计算得到主控 方终端对所述推荐视频的当前播放时间点， 并将包含主控方终端对所述推 荐视频的当前视频播放时间点的播放进度信息下发给受控方终端。
11、 根据权利要求 10所述的同步服务器， 其中， 所述播放进度信息包 括： 所述推荐视频的标识、 视频播放时间点、 同步组标识和系统时间戳； 其中， 视频播放时间点配置为标识所述主控方终端或受控方终端上报播放 进度信息时推荐视频的当前播放时间点， 或者配置为标识下发播放进度信 息给受控方终端时主控方终端对所述推荐视频的当前播放时间点； 系统时 间戳， 配置为标识播放进度信息发送时的系统时间。
12、 根据权利要求 10所述的同步服务器， 其中， 所述同步服务器还包 括： 判断单元， 配置为根据所述主控方终端与受控方终端实时上报的播放 进度信息， 判断主控方终端与受控方终端之间的播放误差超过了预设的同 步播放控制阈值， 则通知所述下发单元；
所述下发单元， 配置为在接收到所述判断单元的通知时， 根据所述主 控方终端的播放进度信息计算得到主控方终端对所述推荐视频的当前播放 时间点， 并将包含主控方终端对所述推荐视频的当前视频播放时间点的播 放进度信息下发给受控方终端。
13、 根据权利要求 12所述的同步服务器， 其中， 所述判断单元， 配置 为：
根据所述接收单元接收的主控方终端的播放进度信息， 计算得到主控 方终端对所述推荐视频的当前播放时间点；
根据所述接收单元接收的受控方终端的播放进度信息， 计算得到受控 方终端对所述推荐视频的当前播放时间点；
由所述主控方终端对推荐视频的当前播放时间点与所述受控方终端对 推荐视频的当前播放时间点之间的差值， 得到主控方终端与受控方终端之 间的播放误差；
将所述主控方终端与受控方终端之间的播放误差与预设的同步播放控 制阈值进行比较， 判断所述主控方终端与受控方终端之间的播放误差是否 超过了预设的同步播放控制阈值。
14、 根据权利要求 10至 13任一项所述的同步服务器， 其中， 所述同 步服务器还包括： 建立单元， 配置为建立包括有所述主控方终端与受控方 终端的同步组， 并将该同步组的信息下发给所述主控方终端和受控方终端。
15、 一种配置为视频推荐业务中播放同步控制的受控方终端， 所述受 控方终端， 配置为在推荐视频的播放过程中实时上报播放进度信息给同步 服务器， 所述播放进度信息中包含系统时间戳， 配置为标识播放进度信息 发送时的系统时间； 以及， 配置为接收所述同步服务器下发的播放进度信 息， 根据所述播放进度信息计算得到主控方终端当前的播放进度， 并调整 推荐视频的播放进度与所述主控方当前的播放进度一致。
16、 根据权利要求 15所述的受控方终端， 其中，
所述播放进度信息包括： 所述推荐视频的标识、 视频播放时间点、 同 步组标识和系统时间戳； 其中， 视频播放时间点配置为标识所述主控方终 端或受控方终端上报播放进度信息时推荐视频的当前播放时间点， 或者配 置为标识下发播放进度信息给受控方终端时主控方终端对所述推荐视频的 当前播放时间点； 系统时间戳， 配置为标识播放进度信息发送时的系统时 间。
17、 一种配置为视频推荐业务中播放同步控制的主控方终端， 所述主 控方终端， 配置为在推荐视频的播放过程中实时上报播放进度信息给同步 服务器， 所述播放进度信息中包含系统时间戳， 配置为标识播放进度信息 发送时的系统时间。
18、 根据权利要求 17所述的主控方终端， 其中，
所述播放进度信息包括： 所述推荐视频的标识、 视频播放时间点、 同 步组标识和系统时间戳； 其中， 视频播放时间点配置为标识所述主控方终 端或受控方终端上报播放进度信息时推荐视频的当前播放时间点， 或者配 置为标识下发播放进度信息给受控方终端时主控方终端对所述推荐视频的 当前播放时间点； 系统时间戳， 配置为标识播放进度信息发送时的系统时 间。
19、 根据权利要求 17所述的主控方终端， 其中，
主控方终端， 还配置为接收同步服务器在建立包括有所述主控方终端 与受控方终端的同步组后下发的所述同步组的信息， 向受控方终端发送视 频推荐请求， 并在所述视频推荐请求中携带所述同步组的信息。
20、 一种配置为视频推荐业务中播放同步控制的系统， 其中， 所述系 统包括主控方终端、 受控方终端和同步服务器， 其中，
所述同步服务器包括： 接收单元、 下发单元； 所述接收单元， 配置为 接收主控方终端与受控方终端在推荐视频的播放过程中实时上报播放进度 信息， 所述播放进度信息中包含系统时间戳， 配置为标识播放进度信息发 送时的系统时间； 下发单元， 配置为根据所述主控方终端的播放进度信息 计算得到主控方终端对所述推荐视频的当前播放时间点， 并将包含主控方 终端对所述推荐视频的当前视频播放时间点的播放进度信息下发给受控方 终端；
主控方终端， 配置为在推荐视频的播放过程中实时上报播放进度信息 给所述同步服务器；
受控方终端， 配置为在推荐视频的播放过程中实时上报播放进度信息 给所述同步服务器； 以及， 配置为接收所述同步服务器下发的播放进度信 息， 根据所述播放进度信息计算得到主控方终端当前的播放进度， 并调整 推荐视频的播放进度与所述主控方当前的播放进度一致。
21、根据权利要求 20所述的系统， 所述同步服务器还包括： 建立单元， 配置为建立包括有所述主控方终端与受控方终端的同步组， 并将该同步组 的信息下发给所述主控方终端和受控方终端；
主控方终端， 还配置为向受控方终端发送视频推荐请求， 并在所述视 频推荐请求中携带所述同步组的信息。
22、 根据权利要求 20所述的系统， 其中， 所述受控方终端， 配置为根 据所述播放进度信息中的视频播放时间点和系统时间戳， 计算得到主控方 终端对所述推荐视频的当前播放时间点， 并将所述推荐视频在本地的播放 进度调整到所述主控方终端对所述推荐视频的当前播放时间点。
23、 根据权利要求 20所述的系统， 其中， 所述播放进度信息包括： 所 述推荐视频的标识、 视频播放时间点、 同步组标识和系统时间戳； 其中， 视频播放时间点配置为标识所述主控方终端或受控方终端上报播放进度信 息时推荐视频的当前播放时间点， 或者配置为标识下发播放进度信息给受 控方终端时主控方终端对所述推荐视频的当前播放时间点； 系统时间戳， 配置为标识播放进度信息发送时的系统时间。
24、 根据权利要求 20所述的系统， 其中，
所述同步服务器还包括： 判断单元， 配置为根据所述主控方终端与受 控方终端实时上报的播放进度信息， 判断主控方终端与受控方终端之间的 播放误差超过了预设的同步播放控制阈值， 则通知所述下发单元；
所述下发单元， 配置为在接收到所述判断单元的通知时， 根据所述主 控方终端的播放进度信息计算得到主控方终端对所述推荐视频的当前播放 时间点， 并将包含主控方终端对所述推荐视频的当前视频播放时间点的播 放进度信息下发给受控方终端。
25、 根据权利要求 24所述的系统， 其中， 所述判断单元， 配置为： 根据所述接收单元接收的主控方终端的播放进度信息， 计算得到主控 方终端对所述推荐视频的当前播放时间点；
根据所述接收单元接收的受控方终端的播放进度信息， 计算得到受控 方终端对所述推荐视频的当前播放时间点；
由所述主控方终端对推荐视频的当前播放时间点与所述受控方终端对 推荐视频的当前播放时间点之间的差值， 得到主控方终端与受控方终端之 间的播放误差；
将所述主控方终端与受控方终端之间的播放误差与预设的同步播放控制 阈值进行比较， 判断所述主控方终端与受控方终端之间的播放误差是否 超过了预设的同步播放控制阈值。
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