Method of video frame alignment
A video frame and candidate source technology, applied in the field of live broadcast, can solve problems such as stagnation, video sequence frame loss, frame skipping, etc., to achieve the effect of improving the accuracy rate
Active Publication Date: 2022-01-25
GUANGZHOU HUYA INFORMATION TECH CO LTD
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However, in the transmission process of the actual communication system, because the video sequence of the communication system often has phenomena such as frame loss, frame skipping, and stagnation during the transmission process, that is, the received video sequence is not always aligned with the source sequence frame by frame. , so the research on video frame alignment is the first step in video quality evaluation
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[0075] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present application as recited in the appended claims.
[0076] The terminology used in this application is for the purpose of describing particular embodiments only, and is not intended to limit the application. As used in this application and the appended claims, the singular forms "a", "the", and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It should also be understood that the term...
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The present application discloses a method for aligning video frames, comprising: selecting a set of candidate source video frames matching the current video frame under test from a sequence of source video frames; selecting a first matching source video frame set from the set of candidate source video frames frame; generate the first mapping relationship between the current video frame under test and the first matching source video frame, and form the first mapping relationship corresponding to all video frames under test into a first mapping set; from the first mapping set Determine the target source video frame that is aligned with the current video frame under test. The obtained target source video frame not only considers the factors of the frame under test itself, but also considers the factors of the matching set as a whole, which can quickly solve the problem of video frame encounters during transmission. Influenced by unfavorable factors such as frame loss, frame skipping, pause, and frame rate inconsistency, the accuracy of frame alignment is improved, providing objective conditions for evaluating transcoding performance, and better supporting the progress of designated projects.
Description
technical field [0001] The present application relates to the field of live broadcast, in particular to a method for aligning video frames. Background technique [0002] The detection and evaluation technology of video quality is one of the key technologies to ensure the quality of service of the new generation network, which can be applied in many fields such as the scheme design of wireless communication system, video compression and coding performance comparison, and various business monitoring. The International Telecommunication Union (ITU) Telecommunication Standardization Group established a video quality expert group in 1997. In August 2008, ITU released two new standards, ITU_T J.246 and J.247. Among them, J.246 recommends 4 full-reference video quality assessment models, and J.247 recommends some reference objective video quality assessment models. However, both of the above are performed on the assumption that the source video frame and the tested video frame are...
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IPC IPC(8): H04N21/234H04N21/2343H04N21/44H04N21/4402
Inventor 洪旭东张伟
Owner GUANGZHOU HUYA INFORMATION TECH CO LTD