An efficient video playback frame loss control system and method thereof
A video playback and control system technology, applied in image communication, selective content distribution, electrical components, etc., can solve the problem of no strict calculation method for frame loss level and playback delay level, loose correspondence between control amount and feedback amount, and control Effect and adaptability limitations, etc., to achieve good audio and video synchronization, meet video synchronization playback requirements, good control effect and adaptability
Inactive Publication Date: 2017-10-20
风网科技(北京)有限公司
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0009] 4. Video decoding and display requires a large amount of computation. If the computing power of the hardware device is insufficient, there will be a phenomenon that the display time of the video frame lags behind the corresponding audio. This phenomenon is that the audio and video are out of sync.
[0014] The main disadvantages of the existing frame loss control methods are the large delay and the imprecise correspondence between the control amount and the feedback amount
[0015] 1) The delay is large because the video frame will stay in the video frame buffer for a period of time from the end of decoding to the display, which leads to a longer distance between the feedback point and the control point, a larger time delay, and poor feedback control response. sensitive
[0016] 2) The corresponding relationship between the control amount and the feedback amount is not rigorous, which means that there is no strict calculation method for the matching relationship between the frame loss level and the playback delay level, and it is often determined by experience and experiments. great limitations
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0043] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.
[0044] Such as image 3 As shown, it is a structural diagram of an efficient video playback frame loss control system of the present invention. The system 300 includes: a frame loss control module 10 , a video decoding module 20 , and a video playing module 30 .
[0045] The video decoding module 20 is configured to compare the video frame time stamp with the current time of the video decoding clock after the video frame decoding is completed, and feed back the comparison result to the frame loss control module 10 before video decoding.
[0046] The video decoding clock is similar to the video playback clock, and is a clock that needs to be referred to during video decoding. After the video decoding module 20 completes the decoding of each video frame, its timestamp should be earlier than or ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The present invention discloses an efficient video playback frame loss control system and method thereof, wherein the method includes: step 1, after the decoding of the video frame is completed, comparing the time stamp of the video frame with the current time of the video decoding clock, Obtaining the comparison result; step 2, setting a frame loss flag according to the comparison result, performing decoding processing and performing frame loss control on the next frame of the video frame according to the frame loss flag. The method of the invention realizes audio and video synchronous playback of video files on an embedded device (such as a mobile phone) with limited computing resources.
Description
technical field [0001] The invention relates to video playing technology, in particular to an efficient video playing frame loss control system and method thereof. Background technique [0002] The existing video player structure is roughly as follows figure 1 As shown, the audio and video are played separately. Specifically, after the audio and video are separated, video compressed data and audio compressed data are obtained respectively, and the video compressed data is decoded to obtain video frame data, and the audio compressed data is decoded to obtain audio sampling data. , perform video display on the video frame data, and perform audio playback on the audio sample data. [0003] If the speed of audio and video decoding is fast enough (the hardware performance is very good, and the decoding can be completed within the interval between displaying one frame and waiting for the next frame to be displayed), then this solution without playback control can meet the require...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H04N21/647H04N21/8547
Inventor 王东辉韩兆强冀德
Owner 风网科技(北京)有限公司