127results about How to "Realize synchronous playback" patented technology

The invention discloses a synchronization method of a mobile phone streaming media audio and video, comprising the steps as follows: the received audio and video data packet is registered into the buffer area of a mobile phone terminal to carry out framing and sorting; when the audio data packet is decoded by a decoder, the difference value between system time when the audio data packet is sent to the decoder and time stamp of the audio frame of the audio data packet is recorded to be taken as a reference time offset value; the decoding and sending display time of the video data packet can be determined according to the reference offset value, so as to realize the synchronous playing. As the synchronization proposal before the audio and video decoding is adopted, more particularly, the reference time offset value is corrected by the audio and video decoding time compensation time, the time offset of the audio and video data flow caused by the equipment in the process before the transmission and decoding is effectively solved, the restriction that the decoded audio and video data flow can not be operated by certain techniques of the current mobile phone terminals and the used decoder is broken down, and the synchronous playing of the audio and video of the mobile phone is excellently realized.

The embodiment of the invention relates to a long-distance karaoke implanting method based on Internet protocol television networks and a system thereof. The method comprises: a first terminal launches a first request message for chorusing the first song with a second terminal in the same virtual compartment to a karaoke service management server; the karaoke service management server forwards the first request message to the second terminal, receives a first consent message returned by the second terminal and forwards the first consent message to the first terminal; the karaoke service management server sends a second request message for allowing chorus to the first terminal; the first terminal triggers the karaoke service management server to send a synchronous sequence to the first terminal and second terminal according to the received second request message. The long-distance karaoke implanting method and system based on Internet protocol television networks provided in the invention are designed to avoid transmitting audio and video accompaniments via networks in real time and reduce occupation of network resource.

The embodiment of the invention provides a multimedia data synchronous playing method and device, used for realizing multimedia data synchronous playing among a plurality of multimedia playing devices. The multimedia data synchronous playing method comprises: performing clock synchronization with a multimedia playing device according to the data transmission delay time of each multimedia playing device; receiving multimedia data including time labels; and according to clock time after synchronization, target data transmission delay time, the buffer time of each frame of multimedia data in the multimedia playing device, and the playing time of each frame of multimedia data indicated by the time labels, calculating the playback time of each frame of multimedia data, and sending the multimedia data and the playback time of each frame of multimedia data to a plurality of multimedia playing devices so as to indicate the multimedia playing devices to play back multimedia data according to the relation between received playback time of each frame of multimedia data and self clock current time.

The invention relates to an unmanned vehicle multi-sensor data synchronous acquisition system which comprises an environment awareness data acquisition device, an Ethernet switch 1, an inertial navigation data acquisition device, a vehicle control unit, an instruction issuing and vehicle state feedback Nport, an Ethernet switch 2, a planning industrial personal computer, a sensing industrial personal computer, a CAN data acquisition device, a CAN network, and a CAN network data acquisition device. The planning industrial personal computer stores CAN network data, a corresponding relation between bottom layer time issued by the vehicle control unit through the CAN network and the time of the timer of the CAN data acquisition device, and inertial navigation data. The sensing industrial personal computer stores environment awareness data, and achieves synchronous association of the CAN network data, the environment awareness data, and the inertial navigation data using the bottom layer time issued by the vehicle control unit as marks. A test shows that the unmanned vehicle multi-sensor data synchronous acquisition system is stable and reliable, and provides technical guarantee for the synchronous replaying of the unmanned vehicle environmental information data, the navigation and positioning data, the vehicle attitude information and vehicle bottom state information.

The embodiment of the invention discloses a transfer processing method and a transfer processing system for a multi-channel real-time streaming media file, and a receiving device. The method comprises the following steps of: receiving data packets on L streaming media channels by a client side in a way of aiming at a same streaming media program, wherein the system clocks of N streaming media servers are consistent; when a time variable phi is a nonblank value, recognizing whether timestamps TS on the data packets are more than the sum TC+phi of the current system moment TC of the client side and the time variable phi or not; if the timestamps are not more than the sum, abandoning the data packets; if the timestamps are more than the sum, storing the data packets in a corresponding buffer area playing queue according to a sequence from a small one to a big one of the timestamps TS; and when the TC+phi reaches the timestamp TS on a first data packet in the playing queue, decompressing, decoding and playing the data packets in the playing queue in sequence. According to the embodiment of the invention, the synchronous playing of the real-time streaming media files transferred in a multi-channel way can be realized, and the situation that a plurality of frames are asynchronous is avoided.

The embodiment of the invention provides a cross-device method for synchronously playing audio and video data, playing devices and a system thereof. The method comprises the following steps: obtaining an audio data packet played by a current system via a first playing device and recording first system time of the first playing device when obtaining the audio data packet; determining audio playing time of the audio data packet via the first playing device and sending the audio data packet and the audio playing time to a second playing device; playing the audio data packet via the second playing device when an absolute value of time difference between the current system time of the second playing device and the audio playing time is less than or equal to a preset threshold; and playing video images corresponding to the audio data packet via the first playing device according to video playing time, and synchronously playing the audio and video data of different devices, wherein the video playing time is the sum of the first system time and the predetermined playing delay time; the audio playing time is the sum of the first system time, the playing delay time, and the system time difference between the first playing device and the second playing device.

The embodiment of the invention discloses an implementation method of Karaoke service based on an IPTV (Internet Protocol Television) system. After a first terminal and a second terminal form Karaoke connection, a service terminal establishes a play list and sends the play list to the first terminal and the second terminal; when the first terminal and/or the second terminal start(s) the play list, a server terminal synchronously sends media stream to the first terminal and the second terminal; the first terminal collects first audio stream of a song of a local terminal user in real time to be subjected to audio mixing playing with the media stream sent by the server terminal, and sends the first audio stream to the second terminal to be subjected to audio mixing playing with the media stream sent by the server terminal; and the second terminal collects second audio stream of the song of the local terminal user in real time to be subjected to audio mixing playing with the media stream sent by the server terminal, and sends the second audio stream to the first terminal to be subjected to audio mixing playing with the media stream sent by the server terminal. The embodiment of the invention also discloses a terminal, the server terminal and an IPTV (Internet Protocol Television) system. The invention can realize remote Karaoke interaction (such as chorus and the like).

The invention provides a device for playing animations during startup of a computer and a method thereof. The method comprises the following steps: acquiring and decoding audio media data after starting up the computer to form an audio media stream, and playing the audio media stream by a called audio drive before the computer is controlled by an operating system. By adopting the technology, a user can synchronously operate a plurality of media streams of a startup interface such as animation video, audio and the like when the computer is started so as to realize synchronous play of a plurality of the media streams; and the user can customize startup animation contents at any time without help of the operating system, and designate a play mode.

The invention discloses a method and a device for multi-thread video and audio synchronous control. The method comprises the following steps of: splitting transport stream or program stream into audio basic steam, video basic stream and respective time information; acquiring audio data and image data to be output by decoding; selecting the audio data and the image data to be output in accordance with the local system clock requirement according to the time information for outputting respectively, and selecting the audio data and the image data, the time information of which is closest to the local system clock value; calculating the difference between the corresponding time of the audio data and the corresponding time of the image data; and when the corresponding time of the video data is greater than the corresponding time of the audio data, repeatedly outputting the video data for displaying, otherwise, skipping the video play of the video data and performing frame kipping processing so as to synchronously output the audio and the video. The method and the device do not need to supplement a large amount of video coding data and audio image data so as to greatly reduce the utilization of the system resources.

The embodiment of the invention provides a video data and audio data synchronized playing method and device and equipment. The method includes the steps that multimedia data are received on a display terminal side; the multimedia data comprise video data and audio data; the video data carry one or more video timestamps; the audio data are sent to a mobile device side; the display terminal side is connected with the mobile device side in a wireless transmission mode; when the video data are played, playing object timestamps are generated according to currently-played video timestamps; the playing object timestamps are sent to the mobile device side; the mobile device side is used for playing the audio data corresponding to the playing object timestamps. With the video data and audio data synchronized playing method and device and the equipment, the constraint caused when wired earphones are directly connected with a display terminal can be gotten rid of by a user, operation of the user is facilitated, and synchronized playing of the audio data and the video data is achieved.

The invention discloses a method for synchronously playing streaming media audios and videos based on parallel processing, and belongs to the field of audio and video image processing. By dividing the playing process of streaming media audio and video data from one or more network service points or local existing streaming media audio and video data into the steps of audio and video acquisition, audio and video splitting, video decoding, audio decoding, time stamp error analysis, video rendering, audio playing and the like, based on a split time stamp, whether video playing after audio playing and video rendering meets playing conditions or not is judged, accordingly, the audios and the videos are synchronously played, and the problem of mismatching of video decoding speed and rendering speed is solved. The steps can be operated on the same server of a multiprocessor or different servers connected through a network, so that parallel processing in terms of time and/or space can be realized by means of parallel starting operation.

This invention relates to one method for multi-media broadcast audio frequency play, which sets one initial play time section to express channel data initial time and comprises the following steps: cutting visual and audio frequency into multiple units; according to each initial play time and whole channel data initial play time difference, in each visual and audio section heads setting one relative play time section to record each visual and audio unit play relative time difference.

The invention discloses a method of displaying video simultaneously. The method comprises the steps that a synchronization master and at least one synchronization slave lead a displaying package, wherein the displaying package is packaged with a video file list, at least one video file and a mark identity (ID) corresponding to the video file, the synchronization master displays the video file according to the video file list, sends the mark ID corresponding to the displayed video file to at least one synchronization slave, and sends displayed video frame information to the synchronization slave in real time, and the synchronization slave receives the mark ID sent by the synchronization master in real time and searches the video file in the displaying package according to the mark ID, if the corresponding video file is searched, the video file is displayed according to the video frame information, and if the corresponding video file is not searched, the present video file is displayed continuously. The method enables the videos of the synchronization master and the synchronization slave to be displayed simultaneously, is accurate to the video frame, and achieves shocking effect of the video.

The embodiments of the invention disclose a method and a device for synchronously playing a panoramic video on multiple terminals. The method comprises the following steps: acquiring angle-of-view information and time information of a panoramic video played on a first terminal; generating panoramic video data synchronous with the panoramic video played on the first terminal according to the angle-of-view information and the time information; and sending the panoramic video data to a second terminal. According to the method and the device for synchronously playing a panoramic video on multiple terminals disclosed by the embodiments of the invention, the panoramic video data is generated according to the acquired angle-of-view information and time information of the panoramic video played on the first terminal to realize panoramic video playing on the second terminal, and thus, synchronous playing of a panoramic video in the time and angle-of-view directions is realized.

The embodiments of the present invention provide a video file synchronous playing method and device. The video file synchronous playing method includes the following steps that: at least two paths ofvideos to be played are parsed, wherein the videos to be played include time-zone time, and each video frame in the videos to be played contains the absolute time of the video frame; the current reference time of each path of video to be played is periodically calculated, wherein the current reference time of the video to be played is time is obtained by performing conversion calculation on the absolute time of a current video frame to be displayed in the video to be played according to the time-zone time in the video to be played; and the display of the current video frame to be displayed inthe video to be played is controlled according to the current reference time of each path of video to be played, so that the playing of each path of video to be played is synchronized. With the videofile synchronous playing method and device provided by the technical schemes of the invention adopted, the synchronous playing of videos in different time zones can be realized.

The embodiment of the invention provides a synchronous play method and device. The method comprises following steps of receiving access requests sent by terminal devices, wherein attribute information of the terminal devices and selected video information for play are carried in the access requests; judging whether current time is in the allowed access time period corresponding to a video for play or not according to the selected video information for play and an allowed access time period corresponding to each locally stored video; judging whether the terminal devices can access or not according to the attribute information of the terminal devices and the video for play if the current time is in the allowed access time period corresponding to the video for play; and providing the data of the corresponding video for play to the terminal devices according to the current time if the terminal devices can access. Through application of the embodiment of the method and the device, the corresponding video data is provided for the terminal devices satisfying access conditions by setting the access conditions; the play progress differences among the terminals resulting from resource differences of the terminal devices can be avoided; and the synchronous play among multiple terminal devices can be realized.

The invention relates to a method for synchronously playing audio and video streaming media in a wireless environment. The method comprises the following steps of: respectively regulating an audio frame size and a video playing frame rate to achieve internal synchronization of audio streaming media and the internal synchronization of video streaming media according to an occupation level of a buffer area; and on the basis of the internal synchronization of the audio and video streaming media, comparing time tags of an audio unit and a video unit to regulate the video playing frame rate to achieve the synchronization between the audio streaming media and the video streaming media. The invention has the advantages of not only providing a method for the internal synchronization of the video streaming media but also providing a method for the internal synchronization of the audio streaming media and a method for the internal synchronization between the audio and video streaming media in the wireless environment, and realizing synchronous playing of the audio and video streaming media in the wireless environment.

The invention relates to the technical field of telecommunications and discloses a multi-screen synchronization method and a playing system for the same local area network. The method includes the steps that a central server serving as a server side transmits at least one playing task to a plurality of intelligent terminals serving as client sides, wherein every intelligent terminal and the central server are in the same local area network, and the playing task comprises content to be played and content identification; the central server sends a playing instruction to every intelligent terminal in real time when the playing needs to be performed, wherein the playing instruction comprises the content identification of the content to be played; every intelligent terminal finds the content to be played according to the content identification and displays the content on a display screen of the intelligent terminal when intelligent terminal receives the play instruction. Compared with the prior art, the multi-screen synchronization method and the playing system for the same local area network achieve playing content synchronization of every intelligent terminal in the same local area network, and the number of the intelligent terminals can be unrestricted.

The invention discloses a three-dimensional figure and image multi-screen synchronous broadcasting method, device and system. The three-dimensional figure and image multi-screen synchronous broadcasting method, device and system are used for processing multiple devices to commonly process a large-scale three-dimensional scene, and therefore the devices can accurately achieve the synchronous output effect. The three-dimensional figure and image multiple-screen synchronous broadcasting method includes the steps that a synchronous device generates a synchronous instruction for instructing rendering synchronization among all rendering devices, and each synchronous instruction includes a synchronous frame number used for instructing frame number synchronization of the rendering devices; the synchronous device broadcasts the synchronous instructions to all the rendering devices; before each time of broadcasting the synchronous instruction, the synchronous device needs to firstly receive response information representing completing of the last synchronous instruction after all the rendering devices render a frame number equal to a synchronous frame number which is included in the last synchronous instruction.

The invention discloses a method for synchronously playing multiple videos in a home page of a set-top box end and a set-top box. The method comprises the steps of connecting the set-top box to a specified server and downloading a preset multi-video play layout file in a template of the specified server; analyzing the multi-video play layout file and obtaining play information of multiple videos, wherein the play information at least includes positions, sizes, play addresses, play data information and specified play time of multiple video play windows; and decoding the play information and playing the corresponding multi-video data through multiple windows after loading is completed. According to the method, a client can quickly and conveniently select the required video content; and daily maintenance and data updating are convenient and fast and the data updating timeliness is improved. Meanwhile, the page layout is provided with the play windows, so that the recommended data content can be a picture type or a video type, and the resource utilization efficiency is improved.

The invention discloses a multimedia file splicing method and apparatus. The method comprises: a first video clip and a second video clip that are going to be spliced are obtained; audio files corresponding to the first video clip and the second video clip are obtained, wherein the audio files record first starting and ending time of the first video clip and second starting and ending time of the second video clip; the first video clip is adjusted to be played within a first period of time indicated by the first starting and ending time and the second video clip is adjusted to be played with a second period of time indicated by the second starting and ending time, wherein the first period of time and the second period of time do not overlap with each other; and splicing operation is carried out on the adjusted first video clip and the adjusted second video clip to obtain a spliced video file. According to the invention, a technical problem of low synthesis precision during the audio and video splicing process in the prior art can be solved.