CN108540829B - Synchronous playing method, system and terminal for multi-playing device - Google Patents
Synchronous playing method, system and terminal for multi-playing device Download PDFInfo
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- 230000001934 delay Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—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
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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]
- H04N21/20—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]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
- H04N21/43615—Interfacing a Home Network, e.g. for connecting the client to a plurality of peripherals
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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
- H04N21/47—End-user applications
- H04N21/472—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content
- H04N21/47217—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content for controlling playback functions for recorded or on-demand content, e.g. using progress bars, mode or play-point indicators or bookmarks
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Abstract
The invention provides a method, a system and a terminal for synchronously playing multi-playing equipment. The display delay data of different playback devices is related to their own data buffer size, and thus the display delay data of different playback devices is fixed. And determining the compensated playing progress compensated by the main playing device according to the main display delay data and the current playing progress of the main playing device. And the slave playing equipment determines the corrected playing progress corrected by the slave playing equipment according to the compensated playing progress and the slave display delay data, and further synchronizes the current playing progress of the slave playing equipment to the corrected playing progress. Due to the compensation and correction of the main display delay data and the slave display delay data, the playing progress of the main playing equipment and the slave playing equipment is automatically compensated, and then the playing pictures and the audio progress presented by the main playing equipment and the slave playing equipment are consistent, namely the complete synchronization of the main playing equipment and the slave playing equipment is realized.
Description
Technical Field
The present invention relates to the field of synchronous playing technologies, and in particular, to a method, a system, and a terminal for synchronous playing of a multi-player device.
Background
The synchronous playing of multiple playing devices is a method for synchronously playing the same video and/or audio by multiple playing devices, and is mainly applied to places such as advertisement display, exhibition halls or demonstration halls.
Currently, the conventional method for synchronous playing of a multi-player device is as follows: the multiple playing devices are connected to the same local area network, one playing device is set as a main playing device, and the other playing devices are set as slave playing devices. When a plurality of playing devices play the same video and/or audio at the same time, the main playing device sends the current playing progress to the slave playing device, and the slave playing device synchronizes to the playing progress of the main playing device according to the current playing progress.
The playing device mainly comprises a player, a display processing unit and a screen. For the playing process of a single playing device, the decoded video data output by the player is firstly cached in the display processing unit, and is displayed on the screen after being processed by the image quality of the display processing unit. And different playing devices display different video data cache sizes of the processing unit. As shown in fig. 1, the player has output four frames of video data, but the first frame of video data is displayed on the screen, and the remaining three frames of video data are buffered in the display processing unit, i.e. the buffer size of the video data of the display processing unit is 3 frames of video data. Assuming that the frame rate of the film source is 25fps (Frames Per Second), and the duration of one frame of video data is 40ms, the current playing progress of the main playing device is 4 × 40 ms-160 ms, the screen displays the first frame of picture, i.e. the video data at the 40ms, and the video display delay is 3 × 40 ms-120 ms. The master playing device sends the current playing progress of 160ms to the slave playing device, and the slave playing device synchronizes to the playing progress of 160ms according to the current playing progress, that is, the slave playing device plays the video data at the 160 ms. However, the screen of the master playback device is displayed as video data at 40ms, and the screen synchronized by the slave playback device is displayed as video data at 160ms, and obviously, the screens of the master playback device and the slave playback device display different pictures. Therefore, when a plurality of playing devices perform video synchronous playing, if the display delays of the master playing device and the slave playing devices are different, the screen displays of the master playing device and the slave playing devices are not synchronous.
Disclosure of Invention
The invention provides a synchronous playing method, a system and a terminal of multi-playing equipment, which aim to solve the problem that screen display is not completely synchronous when different playing equipment carries out video synchronous playing.
In a first aspect, the present application provides a method for synchronous playing of multiple playing devices, including:
the main playing device acquires main display delay data and a current playing progress; obtaining slave display delay data from the playing device; the main display delay data comprises a main display delay time or a main display delay frame number; the slave display delay data comprises a slave display delay time or a slave display delay frame number;
the main playing device determines a compensation playing progress according to the main display delay data and the current playing progress;
the slave playing equipment determines a modified playing progress according to the compensation playing progress and the slave display delay data;
and synchronizing the current playing progress of the slave playing equipment to the corrected playing progress.
In a second aspect, the present application provides a system for synchronously playing multiple playing devices, including:
a main display delay data acquisition module, which is used for the main playing device to acquire the main display delay data;
a slave display delay data acquisition module for acquiring slave display delay data from the playback device;
a current playing progress obtaining module, configured to obtain a current playing progress of the main playing device;
a compensation playing progress determining module, configured to determine a compensation playing progress by the main playing device according to the current playing progress and the main display delay data;
a modified playing progress determining module, configured to determine a modified playing progress by the slave playing device according to the compensated playing progress and the slave display delay data;
and the synchronization module is used for synchronizing the current playing progress of the slave playing equipment to the corrected playing progress.
In a third aspect, the present application provides a terminal including the system for synchronously playing back multiple playing devices of the second aspect.
The technical scheme provided by the embodiment of the invention can have the following beneficial effects:
the invention provides a method, a system and a terminal for synchronously playing multi-playing equipment. The display delay data of different playback devices is related to their own video data buffer size, and thus the display delay data of different playback devices is fixed. And determining the compensated playing progress compensated by the main playing device according to the main display delay data and the current playing progress of the main playing device. And the slave playing equipment determines the corrected playing progress corrected by the slave playing equipment according to the compensated playing progress and the slave display delay data, and further synchronizes the current playing progress of the slave playing equipment to the corrected playing progress. Due to the compensation and correction of the main display delay data and the slave display delay data, the playing schedules of the main playing device and the slave playing device are automatically compensated, and then the playing frame schedules of the main playing device and the slave playing device are consistent, namely, the complete synchronization of the main playing device and the slave playing device is realized.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without any creative effort.
Fig. 1 is a schematic diagram of a playing process of a single playing device in the prior art;
fig. 2 is a schematic flowchart of a method for synchronously playing a multi-playing device according to an embodiment of the present invention;
fig. 3 is a current playing state diagram of a main playing device according to an embodiment of the present invention;
fig. 4 is a current playing state diagram of the slave playback device corresponding to fig. 3 according to an embodiment of the present invention.
Detailed Description
When a plurality of playing devices play videos synchronously, the plurality of playing devices are connected to the same local area network, one playing device is set as a main playing device, and the rest playing devices are set as slave playing devices. When a plurality of playing devices play the same video at the same time, the main playing device sends the current playing progress to the slave playing device, and the slave playing device synchronizes to the playing progress of the main playing device according to the current playing progress. For the video playing process of a single playing device, the decoded video data output by the player is firstly cached in the display processing unit, and is displayed on the screen after being processed by the image quality of the display processing unit. And if the current playing progress of the main playing device is displayed as the 5 th frame and the display delay is 4 frames, displaying the content of the 1 st frame on the display screen. And the master playing device sends the 5 th frame as the current playing progress to the slave playing device. Since the video data buffer sizes of the display processing units of different playback devices are different, if the display delay of the slave playback device is 1 frame, the content of the 4 th frame is displayed on the display screen of the slave playback device. Thereby, the screens of the master playback device and the slave playback device display different screens. Therefore, when a plurality of playing devices perform video synchronous playing, if the display delays of the master playing device and the slave playing devices are different, the screen displays of the master playing device and the slave playing devices are not synchronous.
In order to solve the above problem, embodiments of the present application provide a method, a system, and a terminal for synchronous playing of a multi-player device. The core idea of the method for synchronously playing the multi-playing device provided by the embodiment of the application is as follows: since the display delay data of each playback device is fixed, the master and slave playback devices can acquire their respective display delay data. The main playing device determines a compensation playing progress according to the display delay data and the current playing progress of the main playing device, so that the slave playing device determines a correction playing progress according to the display delay data and the compensation playing progress of the slave playing device, and further synchronizes the current playing progress of the slave playing device to the correction playing progress. Due to the compensation and correction of the main display delay data and the slave display delay data, the playing schedules of the main playing device and the slave playing device are automatically compensated, and then the playing frame schedules of the main playing device and the slave playing device are consistent, namely, the complete synchronization of the main playing device and the slave playing device is realized.
The following describes a method, a system, and a terminal for synchronous playing of a multi-player device provided in an embodiment of the present application in detail.
Referring to fig. 2, fig. 2 is a schematic flowchart illustrating a method for synchronously playing a multi-playing device according to an embodiment of the present application.
As can be seen from fig. 2, the method for synchronously playing a multi-player device provided in the embodiment of the present application specifically includes:
s01: the main playing device acquires main display delay data and a current playing progress; obtaining slave display delay data from the playing device; the main display delay data comprises a main display delay time or a main display delay frame number; the slave display delay data includes a slave display delay time or a slave display delay frame number.
The video data buffer sizes of the display processing units of different playing devices are different, so that the display delay data of the playing devices are different. Since the processing capability of the display processing unit of the playback device is fixed, different playback devices have different and fixed display delay data, i.e. the master playback device and the slave playback device have their fixed display delay data, respectively. In the embodiment of the present application, the display delay data includes a display delay time or a display delay frame number, wherein the display delay time can be determined by the display delay frame number and a frame rate of a video played by the playing device.
Since the display delay data of different playback devices is fixed, the display delay data may be stored in a medium such as a data storage or as a system attribute of the playback device. When the main playing device obtains the display delay data, the main playing device calls the stored main display delay data in a data calling mode. The slave playback device acquires the slave display delay data in the same manner as the master playback device.
When a plurality of playing devices play the video synchronously, the main playing device sends the current playing progress of the main playing device to each slave playing device according to the set sending frequency. Wherein, the playing progress is the playing time or the playing time. For example, when the transmission frequency is set to 10 s/time, the master playback device transmits the playback progress of the slave playback devices at 0s, 10s, 20s, and the like, that is, the current playback progress, to the slave playback devices at 0s, 10s, 20s, and the like.
In the method for synchronous playing of a multi-play device provided in the embodiment of the present application, a method for a main play device to obtain a current play progress is provided. The specific contents are as follows:
s0111: and calling the system time, the front audio display time stamp, the front system time and the audio time length which is not output before of the main playing device.
Each time a frame of audio is written into the audio output module by the playing device, the display time stamp (i.e. audio display time stamp), the system time and the audio duration which is not output in the audio output module of the audio are automatically recorded. When the next frame of audio is written, the audio display time stamp, the system time and the duration of the audio not output in the audio output module are automatically updated. Therefore, after writing a frame of audio into the audio output module, the playing device can simultaneously store three data, namely the display timestamp of the previous frame of audio, the current system time and the audio duration which is not output in the current audio output module. The display time stamp of the previous frame of audio, the current system time and the audio time duration which is not output in the current audio output module are respectively referred to as the previous audio display time stamp, the previous system time and the previous audio time duration which is not output.
S0112: and determining the current playing progress of the main playing device according to the system time, the previous audio display time stamp and the audio time length which is not output before.
When the master playing device needs to send the current playing progress to the slave playing device, the sending time is taken as the current time, the current playing progress is the current playing progress, and the system time is the current system time. And subtracting the previous system time and the previous audio time duration from the sum of the current system time and the previous audio display time stamp to obtain the current playing progress of the main playing device.
The method for acquiring the current playing progress by the main playing device is only one exemplary method provided in the embodiment of the present application, and the embodiment does not limit the method for acquiring the current playing progress.
S02: and the main playing equipment determines a compensation playing progress according to the main display delay data and the current playing progress.
In general, the display delay data is a display delay time. And when the acquired display delay data is the display delay frame number, converting the display delay frame number into display delay time so as to calculate the compensation playing progress of the main playing device. And after the main playing device obtains the display delay time and the current playing progress, determining the difference between the current playing progress and the main display delay time as the compensation playing progress of the main playing device. And after the compensation playing progress is determined, the main playing device sends the compensation playing progress to each slave playing device so that the main playing device and the slave playing devices synchronously play the video.
S03: and the slave playing equipment determines a modified playing progress according to the compensation playing progress and the slave display delay data.
And after the slave playing equipment acquires the compensation playing progress sent by the master playing equipment, determining the sum of the acquired compensation playing progress and the slave display delay time of the slave playing equipment as the corrected playing progress of the slave playing equipment. And the slave playing equipment corrects the playing progress according to the corrected playing progress, namely, the playing progress is corrected, and the current playing progress is synchronized with the master playing equipment.
S04: and synchronizing the current playing progress of the slave playing equipment to the corrected playing progress.
After the slave playing device corrects the compensated playing progress sent by the master playing device, that is, after the slave playing device determines to correct the playing progress, the time axis of the slave playing device is adjusted to the corrected playing progress, and the time axis of the slave playing device continues to be played forward based on the corrected playing progress, so that the current playing progress of the slave playing device is updated, and then the master playing device and the slave playing device synchronously play videos and audios.
Because the current playing progress of the master playing device is compensated and corrected by the master display delay data and the slave display delay data, the playing progress of the master playing device and the slave playing device can be automatically compensated, and then the playing picture progresses presented by the master playing device and the slave playing device are consistent, namely, the master playing device and the slave playing device are completely synchronized.
The following describes a method for synchronous playback of a multi-playback device according to an embodiment of the present application.
Referring to fig. 3, fig. 3 shows a current play state diagram of the main playback device, wherein it is assumed that the frame rate of the film source is 25 fps. As shown in fig. 3 and the method for synchronously playing a multi-play device provided in this embodiment of the present application, the method for synchronously playing a multi-play device provided in this embodiment specifically includes:
s11: the main playing device acquires main display delay data and a current playing progress; obtaining slave display delay data from the playing device; the main display delay data comprises a main display delay time or a main display delay frame number; the slave display delay data includes a slave display delay time or a slave display delay frame number.
Assuming that the display delay frame number of the main playback device is 4 frames of video data, the main display delay time is 4 × 0.16s (1/25). Assuming that the number of display delay frames from the playback apparatus is 1 frame video data, the slave display delay time is 1 × 0.04s (1/25). Assuming that the main playback device has output 100 frames of video data, the current playback progress of the main playback device is 100 × 4s (1/25), and the 96 th frame of video data is displayed on the screen of the main playback device.
S12: and the main playing equipment determines the compensation playing progress according to the main display delay data and the current playing progress.
The main playing device determines the compensation playing progress according to the difference between the main display delay time 0.16s and the current playing progress 4s, that is, the compensation playing progress is 4s-0.16 s-3.84 s. Thus, the screen of the main playback device displays the picture at 3.84s, that is, the 96 th frame of video data. And the master playing device sends the determined compensation playing progress to the slave playing device.
S13: the slave playback device determines a modified playback progress based on the compensated playback progress and the slave display delay data.
After the slave playing device acquires the compensated playing progress sent by the master playing device, the modified playing progress is determined according to the sum of the compensated playing progress 3.84s and the slave display delay data 0.04s, namely the modified playing progress is 3.84s +0.04 s-3.88 s.
S14: and synchronizing the current playing progress of the slave playing equipment to the corrected playing progress.
And synchronizing the current playing progress of the slave playing device to the modified playing progress, namely adjusting the time axis of the slave playing device to 3.88 s. At this time, the video data from the playback device is output to 3.88/(1/25) ═ 97 frames. Since the slave display delay time of the slave playback device is 0.04s, the 96 th frame video data is displayed from the screen of the playback device, as shown in fig. 4.
Therefore, the display of the master and slave playing devices is completely synchronized through the compensation of the display delay data of the master and slave playing devices.
Based on the method for synchronously playing the multi-playing device provided by the embodiment of the application, the embodiment of the application also provides a system for synchronously playing the multi-playing device. The synchronous playing system of the multi-playing device provided by the embodiment of the application comprises:
a main display delay data acquisition module, which is used for the main playing device to acquire the main display delay data;
a slave display delay data acquisition module for acquiring slave display delay data from the playback device;
the current playing progress acquiring module is used for acquiring the current playing progress of the main playing equipment;
the compensation playing progress determining module is used for determining the compensation playing progress by the main playing equipment according to the current playing progress and the main display delay data;
the modified playing progress determining module is used for determining modified playing progress according to the compensated playing progress and the slave display delay data by the slave playing equipment;
and the synchronization module is used for synchronizing the current playing progress of the slave playing equipment to the corrected playing progress.
Based on the system for synchronously playing the multi-playing device provided by the embodiment of the application, the embodiment of the application also provides a terminal, and the terminal comprises the system for synchronously playing the multi-playing device in the description.
Those skilled in the art will readily appreciate that the techniques of the embodiments of the present invention may be implemented as software plus a required general purpose hardware platform. Based on such understanding, the technical solutions in the embodiments of the present invention may be essentially or partially implemented in the form of a software product, which may be stored in a storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the embodiments or some parts of the embodiments.
The above-described embodiments of the present invention should not be construed as limiting the scope of the present invention.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (8)
1. A synchronous playing method for multi-playing devices is characterized by comprising the following steps:
the main playing device acquires main display delay data and a current playing progress; obtaining slave display delay data from the playing device; the main display delay data comprises a main display delay time or a main display delay frame number; the slave display delay data comprises a slave display delay time or a slave display delay frame number;
the specific process of acquiring the current playing progress is as follows:
calling the system time, the front audio display timestamp, the front system time and the audio time length which is not output before of the main playing device;
determining the current playing progress of the main playing device according to the system time, the previous audio display time stamp and the audio time length which is not output before;
the main playing device determines a compensation playing progress according to the main display delay data and the current playing progress;
the slave playing equipment determines a modified playing progress according to the compensation playing progress and the slave display delay data;
and synchronizing the current playing progress of the slave playing equipment to the corrected playing progress.
2. The method for synchronized playback by multiple playback devices of claim 1, wherein the determining, by the master playback device, a compensated playback progress based on the current playback progress and the master display delay data comprises:
and determining the difference between the current playing progress and the main display delay time as the compensation playing progress of the main playing equipment.
3. The method for synchronized playback by multiple playback devices of claim 1, wherein the determining, by the slave playback device, a modified playback progress based on the compensated playback progress and the slave display delay data comprises:
the slave playing device acquires the compensation playing progress sent by the master playing device;
and determining the sum value of the compensation playing progress and the slave display delay time as the corrected playing progress of the slave playing equipment.
4. The method for synchronously playing back multiple playback devices according to claim 1, wherein synchronizing the current playback progress of the slave playback device to the modified playback progress comprises:
and adjusting the time axis of the slave playing equipment to the corrected playing progress so as to update the current playing progress of the slave playing equipment.
5. The synchronized playback method for multiple playback devices of claim 1, wherein the acquiring, by the master playback device, master display latency data comprises: the master playback device invokes the stored master display delay data.
6. The synchronized playback method for multiple playback devices of claim 1, wherein the main display delay time is determined according to the main display delay frame number and a frame rate of a video played by the main playback device.
7. A synchronized playback system for multiple playback devices, comprising:
a main display delay data acquisition module, which is used for the main playing device to acquire the main display delay data;
a slave display delay data acquisition module for acquiring slave display delay data from the playback device;
a current playing progress obtaining module, configured to obtain a current playing progress of the main playing device, where the current playing progress obtaining module specifically includes:
calling the system time, the front audio display timestamp, the front system time and the audio time length which is not output before of the main playing device;
determining the current playing progress of the main playing device according to the system time, the previous audio display time stamp and the audio time length which is not output before;
a compensation playing progress determining module, configured to determine a compensation playing progress by the main playing device according to the current playing progress and the main display delay data;
a modified playing progress determining module, configured to determine a modified playing progress by the slave playing device according to the compensated playing progress and the slave display delay data;
and the synchronization module is used for synchronizing the current playing progress of the slave playing equipment to the corrected playing progress.
8. A terminal comprising the multi-playback device synchronized playback system of claim 7.
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| CN109218795B (en) * | 2018-11-29 | 2021-09-24 | 海信视像科技股份有限公司 | Multi-device playing progress synchronization method and device and terminal device |
| CN109698973B (en) * | 2018-12-29 | 2021-01-01 | 武汉斗鱼网络科技有限公司 | Progress updating method and device, electronic equipment and medium |
| CN112188258B (en) * | 2020-09-22 | 2021-12-17 | 上海商泰汽车信息系统有限公司 | Pause synchronization method and device, storage medium, user side and multi-device playing system |
| CN114630169A (en) * | 2020-12-10 | 2022-06-14 | 上海三思电子工程有限公司 | Synchronous display method, device, system, terminal and storage medium |
| WO2023070374A1 (en) * | 2021-10-27 | 2023-05-04 | 京东方科技集团股份有限公司 | Audio and video synchronization method and apparatus, storage medium, and electronic device |
| CN114339351B (en) * | 2021-12-30 | 2024-06-11 | 湖南众益文化传媒股份有限公司 | Synchronous playing equipment and method of advertisement player equipment |
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