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Method and system for increasing multi-path video acquisition front-end processing efficiency

A multi-channel video and front-end processing technology, applied in the field of image communication, can solve the problems of multi-bandwidth and memory, large system overhead, large memory, etc., and achieve the effect of simplifying control, improving processing speed and reducing bandwidth

Active Publication Date: 2017-02-22
ALLWINNER TECH CO LTD
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Problems solved by technology

In this process, the multi-channel video decoder is independent, and the image streams after decoding are separated, and each image needs to be time-stamped and cached according to the synchronization information obtained by decoding. This process takes a long time and requires a lot of memory.
In addition, multiple images at the same time after synchronization need to go through a large amount of cache, which will also consume too much bandwidth and memory, thereby increasing the system overhead

Method used

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  • Method and system for increasing multi-path video acquisition front-end processing efficiency
  • Method and system for increasing multi-path video acquisition front-end processing efficiency
  • Method and system for increasing multi-path video acquisition front-end processing efficiency

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Embodiment Construction

[0037] In many vehicle scenes, there are 360° panorama image acquisition and display applications. In this scene, if the SoC comes with a tv decoder (tvd) controller, in an example that requires four-channel video acquisition, first of all, it needs to pass, for example, The four-way cameras collect images in four directions respectively, and form digital image data after being collected by the four-way tvd controller, and then synchronize and buffer the four-way image data at the application layer, and finally perform panorama algorithm on the four images at the same time Splicing processing to form a picture with 3D effect. In this process, the image data collected by the independent four-channel tvd controller is discrete, and each image needs to be time-stamped, and the images at the same time are copied to the splicing algorithm after a large amount of data. This process It will consume too much bandwidth and memory, which will undoubtedly increase the system overhead for...

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Abstract

The invention relates to a method for increasing multi-path video acquisition front-end processing efficiency. The method comprises the following steps: acquiring a plurality of paths of video streams respectively; generating a common equipment node for processing the plurality of paths of video streams; generating a common buffer chain, wherein the size of a common buffer area is at least the sum of buffer areas occupied by each path of the plurality of paths of video streams; packaging a plurality of registers corresponding to the plurality of paths of video streams on a software layer, so that register addresses corresponding to every frame of the plurality of paths of video streams point to the same common buffer area; and regionally partitioning the common buffer area and setting an offset position according to the sizes of the buffer areas occupied by each path of the plurality of paths of video streams and a ranking rule, so that respective frames of the plurality of paths of video streams at the same moment are cached in the same common buffer area according to the offset position. The invention also relates to a corresponding system for increasing the multi-path video acquisition front-end processing efficiency. Through adoption of the method and the system, the system overhead can be saved, and the synchronous acquisition efficiency of a plurality of paths of videos is increased.

Description

technical field [0001] The invention relates to a method and a system for improving the front-end processing efficiency of multi-channel video acquisition, belonging to the field of image communication. Background technique [0002] Multi-channel video refers to video streams shot by multiple cameras, such as but not limited to different scenes at the same time, or different angles of the same scene. Because it can display videos or images of a wide range of scenes at the same time, it has a wide range of application values . Among them, the vehicle-mounted panoramic display and indoor and outdoor security monitoring are the most widely used. As people's real-time requirements for driving road conditions increase and their attention to driving safety increases, smart car manufacturing has gradually introduced the panoramic display function. Most of them install multi-channel camera devices at different angles of the car body. By buffering the videos captured by all differe...

Claims

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Application Information

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IPC IPC(8): H04N7/18
Inventor 曾奇
Owner ALLWINNER TECH CO LTD
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