CN105763919A - Method and device for display and video synchronization - Google Patents
Method and device for display and video synchronization Download PDFInfo
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- CN105763919A CN105763919A CN201610229967.6A CN201610229967A CN105763919A CN 105763919 A CN105763919 A CN 105763919A CN 201610229967 A CN201610229967 A CN 201610229967A CN 105763919 A CN105763919 A CN 105763919A
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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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- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention provides a method and device for display and video synchronization, wherein the method comprises the following steps of: receiving video source data; obtaining a display controller rendering frequency and a video source frame rate; and sending single-frame video data to a display controller according to the display controller rendering frequency and the video source frame rate, and rendering and displaying single-frame video data. In this way, the problem that video frame rendering and display are not synchronous is solved.
Description
Technical field
The present invention designs Video Rendering field, particularly relates to method and the device of a kind of display and audio video synchronization.
Background technology
In current video playback apparatus, it is not set up synchronization mechanism between frame per second and the refresh rate of display device of video, thus causing when video frame rate is different with display device refresh rate, video playback there will be frame losing, card, slack phenomenon, affects the viewing experience of user.Root the problems referred to above occur is: synchronization mechanism is not set up in rendering of frame of video with display controller, and whether frame of video renders mainly is seen whether audio sync, and expired frame can be dropped and cause frame losing phenomenon；Audio frame also uneven causes frame of video uneven.
Summary of the invention
For this reason, it may be necessary to provide a kind of new video and show Tong Bu method and device, solve frame of video and render and show nonsynchronous problem.
For achieving the above object, a kind of method inventor providing display and audio video synchronization, comprise the steps: to receive video source data, obtain display controller and render frequency and video source frame per second, render frequency and video source frame per second according to display controller and send single frame video data to display controller, render described single frame video data and display.
Specifically, described render frequency and video source frame per second according to display controller and send the method for single frame video data to display controller and comprise the steps: to deposit video source data to pre-rendered queue；
Judge: if display controller renders frequency more than video source frame per second, often deposit a number of single frame video Data duplication and deposit once current single frame video data；If display controller renders frequency less than video source frame per second, then often deposit a number of single frame video data and skip current single frame video data；
Video data in pre-rendered queue is sent to display controller in order.
Further, detection inefficacy frame is further comprised the steps of:；The single frame video data rendered in described pre-rendered queue are deleted, and single frame video data corresponding in the video source data received are deleted.
Specifically, further comprise the steps of: display controller and send frame synchronization interruption.Pre-rendered queue is had no progeny transmission video data in receiving frame synchronization.
A kind of display and the device of audio video synchronization, including such as lower module: receiver module, frequency acquisition module, sending module, render display module；Described reception sending module is used for receiving video source data, described frequency acquisition module is used for obtaining display controller and renders frequency and video source frame per second, described sending module for according to display controller render frequency and video source frame per second to display controller send single frame video data, described in render display module for rendering described single frame video data and displaying.
Specifically, described sending module also includes deposit data submodule, judges submodule；
Described judge that submodule is used for carrying out judging that whether display controller renders frequency more than video source frame per second, described deposit data submodule for display controller render frequency more than video source frame per second in, often deposit a number of single frame video Data duplication and deposit once current single frame video data to pre-rendered queue；Display controller render frequency less than video source frame per second in, often deposit a number of single frame video data to pre-rendered queue and then skip current single frame video data；
Described sending module is additionally operable to send the video data in pre-rendered queue in order to display controller.
Further, also including detection removing module, described detection removing module is for deleting the single frame video data rendered in described pre-rendered queue, and single frame video data corresponding in the video source data received is deleted.
Further, also include interrupting sending module；Described interruption sending module is used for allowing display controller send frame synchronization and interrupts, and described sending module is additionally operable to make pre-rendered queue send video data having no progeny in receiving frame synchronization.
It is different from prior art, technique scheme is by detecting video playback frame per second and display frame rate, carry out when the two is different expanding frame or the operation of contracting frame, also by the trouble-free operation of the method ensuring method arranging frame Buffer Pool, when solving video playback in prior art, show nonsynchronous problem.
Accompanying drawing explanation
Fig. 1 is the video described in the specific embodiment of the invention and display synchronous method flow chart；
Fig. 2 is the video described in the specific embodiment of the invention and display synchronization device module map；
Fig. 3 is that the video described in the specific embodiment of the invention expands frame contracting frame schematic diagram；
Fig. 4 is the expansion frame time sequential routine figure described in the specific embodiment of the invention；
Fig. 5 is the contracting frame time sequential routine figure described in the specific embodiment of the invention.
Description of reference numerals:
21, receiver module；
23, frequency sending module；
25, sending module；
251, deposit data submodule；
253, submodule is judged；
27, display module is rendered；
29, detection removing module；
211, sending module is interrupted.
Detailed description of the invention
By describing the technology contents of technical scheme, structural feature in detail, being realized purpose and effect, below in conjunction with specific embodiment and coordinate accompanying drawing to be explained in detail.
Refer to Fig. 1, method for a kind of display of the present invention with audio video synchronization, comprise the steps: that S101 receives video source data, S102 obtains display controller and renders frequency and video source frame per second, rendering frequency and video source frame per second according to display controller and send single frame video data to display controller, S107 renders described single frame video data and displays.Wherein, video source frame per second is the display frame number that video is per second, display controller renders frequency and refers to the ability of the different render video of different display, the i.e. frame number of display refreshing per second, when the two is different, such as video source is the video of 1280x720 resolution 120FPS, and the hardware limit of decoder is 1280x720 resolution 60FPS, if being not added with the decoding of intervention and render, it may appear that slow play phenomenon.Video source first half section is the video of 1280x720 resolution 60FPS, and the second half section is the video of 1280x720 resolution 40FPS, if being not added with the decoding of intervention and rendering, phenomenon is quickly play in second half section appearance.We's rule renders frequency and video source frame per second by obtaining display controller, render frequency according to display controller and video source frame per second thinks that display controller sends single frame video data, when display controller render frequency higher time, repeat video source at set intervals to send one-frame video data, show for display, when display controller render frequency relatively low time, video source is skipped at set intervals one-frame video data, show for display, avoid slow play or the generation quickly play, solve the problem that video is Tong Bu with display.
In the particular embodiment, described render frequency and video source frame per second according to display controller and send the method for single frame video data to display controller and comprise the steps: to deposit video source data to pre-rendered queue；
Carry out judging S103: if display controller renders frequency more than video source frame per second, then pre-rendered queue needs to carry out expanding frame S104, namely often deposits a number of single frame video Data duplication and deposits once current single frame video data；If display controller renders frequency less than video source frame per second, then pre-rendered queue carries out contracting frame S105 and often deposits a number of single frame video data and skip current single frame video data；The schematic diagram of pre-rendered queue expansion frame and contracting frame is as shown in Figure 3, the concrete ratio expanding frame and contracting frame can render the ratio of frequency and video source frame per second by display controller and determine, pre-rendered queue operates make what sequence of frames of video disclosure satisfy that display controller to render frequency requirement by expanding frame and contracting frame, carry out step afterwards again, being sent to display controller in order by video data in pre-rendered queue, display carries out step S107 render video data and displays after receiving video data.Pass through said method, by pre-rendered queue, improve serious forgiveness during Video Rendering, also provide the Buffer Pool of a frame of video, ensure the fluency of video playback, quickly play during by expanding frame and contracting frame and also being able to avoid video playback or the problem of slow play, when solving video playback, show nonsynchronous problem.
In some other further embodiment, also include step S108 and detect inefficacy frame；The single frame video data rendered in described pre-rendered queue are deleted, and single frame video data corresponding in the video source data received are deleted.Preparation renders sequence and may determine which frame concrete fails (rendered, and will not be rendered again), then notifies sequence of frames of video, deletes inefficacy frame, and sequence of frames of video performs to delete the operation of inefficacy frame.By above-mentioned steps, delete the frame picture rendered, rather than delete immediately after having sent frame picture, it is prevented that the picture caused when network condition difference is lost, and improves the serious forgiveness of the present invention, deletes inefficacy frame and decreases taking of storage resource.
In some concrete embodiments, further comprise the steps of: S106 display controller and send frame synchronization interruption.Pre-rendered queue is had no progeny transmission video data in receiving frame synchronization.The time controller timing that display controller can pass through to carry sends frame synchronization interrupt signal, after receiving interrupt signal, pre-rendered queue transmission video requency frame data renders for display, ideally frame interrupts is uniform, to ensure that the display of frame of video is uniform.Timing sends seriality that frame signal ensure that display plays and ageing, solves video playback better and shows nonsynchronous problem.The working timing figure of pre-rendered queue and frame synchronization interrupt signal as shown in Figure 4 and Figure 5, in the fig. 4 embodiment, it is assumed that video frame rate is 30 frames.When display controller detects isochronous controller scarce capacity, when sufficient frame of video cannot be provided (assuming to provide 24FPS), send to isochronous controller and expand frame message, it is desirable to isochronous controller rationally expands frame (24FPS-> 30FPS), it is ensured that sufficient frame of video supply.In embodiment shown in Fig. 5, it is assumed that video frame rate is 120 frames.(60FPS can only be rendered) when display controller detects rendering capability deficiency, cannot render so high frame per second time, then send contracting frame message to isochronous controller, it is desirable to isochronous controller rationally contracting frame (120FPS-> 60FPS), it is ensured that reasonably frame of video supply.
Here please see Figure 2, for a kind of display and the device of audio video synchronization, including such as lower module: receiver module 21, frequency acquisition module 23, sending module 25, render display module 27；Described receiver module 21 is used for receiving video source data, described frequency acquisition module 23 is used for obtaining display controller and renders frequency and video source frame per second, described sending module 25 sends single frame video data for rendering frequency and video source frame per second according to display controller to display controller, described in render display module 27 for rendering described single frame video data and displaying.Pass through said apparatus, make when display controller render frequency higher time, repeat video source at set intervals to send one-frame video data, show for display, when display controller render frequency relatively low time, video source is skipped at set intervals one-frame video data, shows for display, avoid slow play or the generation quickly play, solve the problem that video is Tong Bu with display.
In the particular embodiment, described sending module 25 also includes deposit data submodule 251, judges submodule 253；
Described judge that submodule 253 is used for carrying out judging that whether display controller renders frequency more than video source frame per second, described deposit data submodule 251 for display controller render frequency more than video source frame per second in, often deposit a number of single frame video Data duplication and deposit once current single frame video data to pre-rendered queue；Display controller render frequency less than video source frame per second in, often deposit a number of single frame video data to pre-rendered queue and then skip current single frame video data；
Described sending module 25 is additionally operable to send the video data in pre-rendered queue in order to display controller.Arranged by above-mentioned module, improve serious forgiveness during Video Rendering, also provide the Buffer Pool of a frame of video, ensure the fluency of video playback, quickly play during by expanding frame and contracting frame and also being able to avoid video playback or the problem of slow play, when solving video playback, show nonsynchronous problem.
In further embodiment, also including detection removing module 29, described detection removing module is for deleting the single frame video data rendered in described pre-rendered queue, and single frame video data corresponding in the video source data received is deleted.Designed by above-mentioned module, delete the frame picture that rendered, rather than delete immediately after having sent frame picture, it is prevented that the picture caused when network condition difference is lost, improve the serious forgiveness of the present invention, delete inefficacy frame and decrease taking of storage resource.
In some other embodiment, also include interrupting sending module 211；Described interruption sending module 211 is used for allowing display controller send frame synchronization and interrupts, and described sending module is additionally operable to make pre-rendered queue send video data having no progeny in receiving frame synchronization.Interrupt by sending frame, it is ensured that the display of frame of video is uniform.Timing sends seriality that frame signal ensure that display plays and ageing, solves video playback better and shows nonsynchronous problem.
To sum up, technical scheme is by detecting video playback frame per second and display frame rate, carry out when the two is different expanding frame or the operation of contracting frame, also by the trouble-free operation of the method ensuring method arranging frame Buffer Pool, when solving video playback in prior art, show nonsynchronous problem.
It should be noted that, in this article, the relational terms of such as first and second or the like is used merely to separate an entity or operation with another entity or operating space, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " includes ", " comprising " or its any other variant are intended to comprising of nonexcludability, so that include the process of a series of key element, method, article or terminal unit not only include those key elements, but also include other key elements being not expressly set out, or also include the key element intrinsic for this process, method, article or terminal unit.When there is no more restriction, statement " including ... " or " comprising ... " key element limited, it is not excluded that there is also other key element in including the process of described key element, method, article or terminal unit.Additionally, in this article, " more than ", " less than ", " exceeding " etc. be interpreted as not including this number；" more than ", " below ", " within " etc. be interpreted as including this number.
Those skilled in the art are it should be appreciated that the various embodiments described above can be provided as method, device or computer program.These embodiments can adopt the form of complete hardware embodiment, complete software implementation or the embodiment in conjunction with software and hardware aspect.All or part of step in the method that the various embodiments described above relate to can be completed by the hardware that program carrys out instruction relevant, described program can be stored in the storage medium that computer equipment can read, for performing all or part of step described in the various embodiments described above method.Described computer equipment, includes but not limited to: personal computer, server, general purpose computer, special-purpose computer, the network equipment, embedded device, programmable device, intelligent mobile terminal, intelligent home device, wearable intelligent equipment, vehicle intelligent equipment etc.；Described storage medium, includes but not limited to: the storage of RAM, ROM, magnetic disc, tape, CD, flash memory, USB flash disk, portable hard drive, storage card, memory stick, the webserver, network cloud storage etc..
The various embodiments described above are that flow chart and/or block diagram with reference to the method according to embodiment, equipment (system) and computer program describe.It should be understood that can by the combination of the flow process in each flow process in computer program instructions flowchart and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can be provided to produce a machine to the processor of computer equipment so that the instruction performed by the processor of computer equipment is produced for realizing the device of function specified in one flow process of flow chart or multiple flow process and/or one square frame of block diagram or multiple square frame.
These computer program instructions may be alternatively stored in the computer equipment readable memory that computer equipment can be guided to work in a specific way, the instruction making to be stored in this computer equipment readable memory produces to include the manufacture of command device, and this command device realizes the function specified in one flow process of flow chart or multiple flow process and/or one square frame of block diagram or multiple square frame.
These computer program instructions also can be loaded on computer equipment, make to perform sequence of operations step on a computing device to produce computer implemented process, thus the instruction that performs on a computing device provides for realizing the step of function specified in one flow process of flow chart or multiple flow process and/or one square frame of block diagram or multiple square frame.
Although the various embodiments described above being described; but those skilled in the art are once know basic creative concept; then these embodiments can be made other change and amendment; so the foregoing is only embodiments of the invention; not thereby the scope of patent protection of the present invention is limited; every equivalent structure utilizing description of the present invention and accompanying drawing content to make or equivalence flow process conversion; or directly or indirectly it is used in other relevant technical fields, all in like manner include within the scope of patent protection of the present invention.
Claims (8)
1. the method for a display and audio video synchronization, it is characterized in that, comprise the steps: to receive video source data, obtain display controller and render frequency and video source frame per second, render frequency and video source frame per second according to display controller and send single frame video data to display controller, render described single frame video data and display.
2. the method for display according to claim 1 and audio video synchronization, it is characterized in that, described render frequency and video source frame per second according to display controller and send the method for single frame video data to display controller and comprise the steps: to deposit video source data to pre-rendered queue；
Judge: if display controller renders frequency more than video source frame per second, often deposit a number of single frame video Data duplication and deposit once current single frame video data；If display controller renders frequency less than video source frame per second, then often deposit a number of single frame video data and skip current single frame video data；
Video data in pre-rendered queue is sent to display controller in order.
3. the method for display according to claim 2 and audio video synchronization, it is characterised in that further comprise the steps of: detection inefficacy frame；The single frame video data rendered in described pre-rendered queue are deleted, and single frame video data corresponding in the video source data received are deleted.
4. the method for display according to claim 2 and audio video synchronization, it is characterised in that further comprise the steps of: display controller and send frame synchronization interruption.Pre-rendered queue is had no progeny transmission video data in receiving frame synchronization.
5. a display and the device of audio video synchronization, it is characterised in that include such as lower module: receiver module, frequency acquisition module, sending module, render display module；Described reception sending module is used for receiving video source data, described frequency acquisition module is used for obtaining display controller and renders frequency and video source frame per second, described sending module for according to display controller render frequency and video source frame per second to display controller send single frame video data, described in render display module for rendering described single frame video data and displaying.
6. the device of display according to claim 5 and audio video synchronization, it is characterised in that described sending module also includes deposit data submodule, judges submodule；
Described judge that submodule is used for carrying out judging that whether display controller renders frequency more than video source frame per second, described deposit data submodule for display controller render frequency more than video source frame per second in, often deposit a number of single frame video Data duplication and deposit once current single frame video data to pre-rendered queue；Display controller render frequency less than video source frame per second in, often deposit a number of single frame video data to pre-rendered queue and then skip current single frame video data；
Described sending module is additionally operable to send the video data in pre-rendered queue in order to display controller.
7. the method for display according to claim 5 and audio video synchronization, it is characterized in that, also include detection removing module, described detection removing module is for deleting the single frame video data rendered in described pre-rendered queue, and single frame video data corresponding in the video source data received is deleted.
8. the method for display according to claim 5 and audio video synchronization, it is characterised in that also include interrupting sending module；Described interruption sending module is used for allowing display controller send frame synchronization and interrupts, and described sending module is additionally operable to make pre-rendered queue send video data having no progeny in receiving frame synchronization.
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| CN108876700A (en) * | 2018-06-01 | 2018-11-23 | 福州瑞芯微电子股份有限公司 | A kind of method and circuit promoting VR display effect |
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| CN112154665A (en) * | 2019-09-05 | 2020-12-29 | 深圳市大疆创新科技有限公司 | Video display method, receiving end, system and storage medium |
| WO2021042341A1 (en) * | 2019-09-05 | 2021-03-11 | 深圳市大疆创新科技有限公司 | Video display method, receiving end, system and storage medium |
| CN110855908A (en) * | 2019-11-18 | 2020-02-28 | 中移（杭州）信息技术有限公司 | Multi-party video screen mixing method and device, network equipment and storage medium |
| CN111479166A (en) * | 2020-04-21 | 2020-07-31 | 成都国翼电子技术有限公司 | Multi-pointer memory access method and video frame rate conversion device |
| CN111757180A (en) * | 2020-07-13 | 2020-10-09 | 杭州海康威视数字技术股份有限公司 | Video display control device, video display system, video display method and device |
| CN113117326A (en) * | 2021-03-26 | 2021-07-16 | 腾讯数码（深圳）有限公司 | Frame rate control method and device |
| CN113316020A (en) * | 2021-05-28 | 2021-08-27 | 上海曼恒数字技术股份有限公司 | Rendering method, device, medium and equipment |
| CN113316020B (en) * | 2021-05-28 | 2023-09-15 | 上海曼恒数字技术股份有限公司 | Rendering method, device, medium and equipment |
| CN114040247A (en) * | 2021-11-09 | 2022-02-11 | 新智认知数据服务有限公司 | Network video stream processing method, electronic equipment and computer readable storage medium |
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