Image stitching method and device for preventing video rollback

An image splicing and video image technology, applied in image communication, selective content distribution, electrical components, etc., can solve the problem of missing writing in video loop storage space, achieve the effect of enhancing user experience and avoiding video fallback

Active Publication Date: 2015-02-18
ZHEJIANG UNIVIEW TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

As mentioned above, when splicing is required, there will be a situation where a loop storage space is missed for a certain video

Method used

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  • Image stitching method and device for preventing video rollback
  • Image stitching method and device for preventing video rollback
  • Image stitching method and device for preventing video rollback

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Embodiment Construction

[0034] Each sub-video source used for image splicing has an independent clock crystal oscillator, and the output pulse signal is used to trigger the sub-video source to output video frames. However, due to the individual differences of the crystal oscillators, there will be errors in the frame rate of the input video frames of each sub-video source, and this error will continue to accumulate during the transmission of the video frames. When the accumulated error reaches a certain value, the video frame input by one sub-video source cannot keep up with the video frames of other sub-video sources, resulting in inconsistent frame rates of the video frames input by each sub-video source, thus causing the problem mentioned in the background art. The received video rolls back. In order to solve this problem of video rollback, the present invention provides an image splicing method to prevent video rollback, which synchronizes the input video frames of each sub-video source to a refe...

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Abstract

The invention discloses an image stitching method and device for preventing video rollback. The method comprises the steps that A, video frames input by all sub video sources are synchronized to a standard frame rate; B, the synchronized video frames of all the sub video sources are made to generate video images through writing and stitching operation, and the video images are stored; C, the stored video images are output to a stitching display screen and displayed. According to the image stitching method and device for preventing video rollback, the problem that video rollback of multi-image image stitching is caused according to an existing writing and stitching mode is solved, and the visual experience of users is better.

Description

technical field [0001] The present invention mainly relates to the splicing technology of video images, especially the method and device for preventing video rollback during the splicing process of video images. Background technique [0002] The existing multi-picture splicing methods mainly include two modes of reading splicing and writing splicing. [0003] read splicing as figure 1 As shown, the storage space of each sub-video participating in multi-screen splicing is independent. When writing, each sub-video is written independently; when reading, it is necessary to fetch several bursts at different addresses to form a Completed row. Therefore, it is easy to write the reading and splicing logic, but the reading is complicated. Each sub-picture needs a jump address, and an address jump strategy needs to be provided for each multi-picture, and the logic processing is difficult. [0004] write splice as figure 2 As shown, the different sub-pictures of the multi-screen ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N21/433H04N21/43H04N21/431
CPCH04N21/4302H04N21/431H04N21/433
Inventor 羊海龙
Owner ZHEJIANG UNIVIEW TECH CO LTD
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