Embedded type image processing method aiming at asynchronous video

Abstract

The invention relates to an embedded type image processing method aiming at asynchronous videos. The method comprises an embedded type image processing system which is composed of an FPGA (field programmable gate array), a DSP (digital signal processor) and four frame memories; and the data cache and output video memory are fused together, so that the time for data transmission is saved; the FPGA switches over the four frame memories according to rules, so that the asynchronous state of synchronous video frames is realized; by adopting more advanced memories, DPS and FGPA chips, the data transmission speed can be increased, the data storage space is expanded, the software processing ability is enhanced, and the upgrading of overall performance indexes of a platform is realized; with the adoption of the method, two functions of image processing and video conversion are realized; the imaging processing function is mainly realized by the DSP; the software reads the data, executes a processing algorithm and covers the frame memories using new data within an input frame period; and the video conversion function refers to that the asynchronous effect of asynchronous video frames is realized through the switchover of the FPGA to the four frame memories.

Description

technical field [0001] The invention belongs to electronic design technology, and in particular relates to an embedded image processing method oriented to asynchronous video. Background technique [0002] Embedded image processing is generally based on DSP+FPGA technology, accepts video information input, runs image processing algorithms, realizes functions such as target tracking, detection, and recognition, and outputs processed image signals at the same time. The input and output specified by the system are often different video formats, and the two are in an asynchronous state due to the difference in frame rate. [0003] The current methods of processing asynchronous video are as follows: if the input of the image processing system is composite analog video, the frame rate is 25Hz; the output is XGA format, the frame rate is 60Hz; an input image generates 2.4 output images on average, and the system processes at this time is There are 3 processing methods for asynchron...

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Problems solved by technology

[0005] The second is the inter-frame asynchronous method, that is, the asynchronous state is limited to the inter-frame state

In this way, the DSP needs to move the video data from the cache to the video memory, and the hardware needs to occupy 2 data ports, which increases the data transmission time.

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