Inter-frame lossless coding and intelligent decoding method with error code resistance mechanism

Abstract

The invention discloses an inter-frame lossless coding and intelligent decoding method with an error code resistance mechanism. The method includes the step of space-borne coding, wherein sequential images f are obtained; the images fk (k=1, 2 ...) are divided into non-overlapping sub-blocks; (3j+1)th frame images serve as reference frame images, j=0, 1 ..., and partitioning JPEG-LS coding is conducted; inter-frame lossless coding is conducted on (3j+2)th frame images and (3j+3)th frame images by referring to the (3j+1)th frame images; a group of EDC information is inserted behind every K sub-blocks to form an error detection code steam; RS (m, n) error correction coding is conducted; the compressed frame header and the frame tail of each frame are added into each compressed code steam; the step of ground decoding, wherein the code streams are searched for the compressed frame headers according to the distance minimization norm, and the compressed code steam of one frame is extracted; multiple pieces of compressed parameter information are extracted from the frame headers; RS (m, n) decoding is conducted; EDC identification codes are searched for; JPEG-LS decoding is carried out on each sub-block of the (3j+1)th frames independently, inter-frame decoding is conducted on the (3j+2)th frame images and the (3j+3)th frame images by referring to the (3j+1)th frame images, and the whole image is spliced. According to the method, the compression effect on the sequential images is good, and error codes can be well corrected through an RS method.

Description

technical field [0001] The invention belongs to the technical field of intersecting technology combining image processing and signal transmission, and in particular relates to an inter-frame lossless encoding and intelligent decoding method with an anti-error mechanism. Background technique [0002] With the improvement of the types and resolutions of spaceborne imaging payloads, the amount of image data acquired by satellites during the effective observation period is increasing. Limited by the geographical distribution of ground receiving stations, on-board storage resources, and downlink bandwidth capabilities, massive image data puts enormous pressure on satellite data management, and on-board image compression is an inevitable choice to solve this problem. The cost of satellite image acquisition is relatively high, and the image data itself is also very important. Therefore, JPEG-LS lossless compression technology is often used in general spaceborne compression systems....

AI Technical Summary

Problems solved by technology

At the same time, the method proposed by the present invention makes up for the problem that the traditional space-borne compression algorithm is more sensitive to bit errors in the process of satellite-to-ground transmission by introducing block technology and error detection and correction coding technology during source coding.

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