Moving-picture information compressing method and system

Abstract

A moving picture information compressing method and its system for compressing, at high compression rate and at high speed, data such that image information can be prediction-coded and for improving the quality of image. In a first working example, the image in one frame is divided into blocks before the inter-frame compression, and each block is approximated to (replaced with) a single plane defined by three elements of the pixels in the block. In a second working example, the pixel of an original image is compared with that of its decompressed compressed-image, information about the difference of each pixel element is outputted, and the smaller block size is applied if a pixel element which leads to a difference larger than a parameter (threshold) P is present, so as to carry out intra-frame compression. In a third working example, I blocks produced by spatially dividing an image are dispersed along the time axis between frames in such a way that no I block is inserted at a block position in a frame updated when the difference between the frames larger than the parameter (threshold) P occurs in a designated period.

Description

technical field [0001] The present invention relates to a method and system for compressing moving image information, which can compress data or image information that can be predictively encoded at a high compression ratio and high speed, and can improve image quality. Background technique [0002] Conventionally, the general process is to transform an image into another type of signal, assign an appropriate code to the transformed signal according to its statistical characteristics, and then transmit the resultant coded signal. In this case, so-called predictive coding is performed for a redundant image within a frame or an image containing regular or planar patterns, which can compress information with a large compression ratio in such a way that: Since there may be a high correlation between neighboring pixels, the next pixel value to be encoded can be predicted to some extent from already encoded pixel values; only components that may not be predicted are extracted and ...

AI Technical Summary

Problems solved by technology

For example, in the case of data errors for some reason, its initial small detrimental effect may be diffused throughout many frames; in the worst case, the reconstruction process stalls

In addition, for the traditional technique of inserting I-frames at fixed intervals, when the reconstruction process starts at a certain time position, it needs to search for the nearest I-frame by some means, reconstruct the image corresponding to it, and reach the target time position The reconstructed frame is displayed after the frame of the I frame; however, the search for the I frame takes a significant amount of time

If some dedicated means to solve the above problems is provided, the corresponding burden on the decoding process will naturally increase

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