JPEG decoding method and device

Abstract

The invention discloses a JPEG decoding method and device, which are applied to the field of image processing, and are characterized in that an FPGA accelerator card reads M pictures from a DDR of theFPGA accelerator card, and M is an integer greater than 1; the FPGA acceleration card correspondingly allocates M pictures read from the DDR to M JPEG decoders, and the M JPEG decoders share the sameGMEM resource on the FPGA acceleration card to perform M paths of parallel JPEG decoding on the M pictures to obtain M paths of decoded data streams; the FPGA acceleration card reads and converges the M paths of decoded data streams to obtain converged decoded data; and the converged decoded data is output to the DDR. According to the invention, the JPEG decoding efficiency is improved.

Description

technical field [0001] The invention belongs to the field of image processing, in particular to a JPEG decoding method and device. Background technique [0002] Joint Photographic Experts Group (English: Joint Photographic Experts Group, abbreviation: JPEG) is a widely used lossy compression standard method for photographic images. JPEG itself only describes how to convert an image into bytes of data stream (streaming). An additional standard created by companies such as C-Cube Microsystems, called JFIF (JPEG File Interchange Format, JPEG File Interchange Format, Joint Photographic Experts Group File Interchange Format) specifies how to produce a file suitable for a computer from a JPEG stream. Files stored and transferred. [0003] With the increasing capacity of the accelerator card, when performing JPEG decoding on the FPGA (Field Programmable Gate Array, Field Programmable Gate Array) accelerator card, in order to maximize the throughput of JPEG decoding, you can place...

AI Technical Summary

Problems solved by technology

However, each core occupies a certain amount of GMEM resources, and the GMEM (cache) resources on each accelerator card are limited, which limits the placement of more cores, thereby limiting the JPEG decoding efficiency of the FPGA.

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