Distributed video coding method based on adaptive interval overlapping factor

Abstract

The invention provides a distributed video coding method based on an adaptive interval overlapping factor. At a coding end, the following steps are executed: dividing an input video sequence into a key frame and a residual frame according to the size of an image group; and calculating a residual image by using the key frame and the residual frame, and compressing the residual image subjected to image segmentation, integer DCT change, quantization and bit plane sequencing by using a DAC encoder. At a decoding end, the following steps are executed: generating auxiliary side information by utilizing a key frame; acquiring the DAC decoding data on a bit plane on a DAC decoder in combination with the side information and a related noise model; finally, reconstructing the decoded residual framesand outputting the reconstructed residual frames; and calculating information entropies of bit plane data streams of encoding and decoding ends of the DVC system respectively, so the code rate control of the encoding and decoding ends of the DVC system can be realized in combination with a power function model. The method has the advantages that for videos with different motion degrees, adaptiveestimation of the DAC interval overlapping factor can be achieved, and therefore code rate control is achieved.

Description

technical field [0001] The invention belongs to the technical field of distributed video coding, and in particular relates to a distributed video coding method based on an adaptive interval overlapping factor. Background technique [0002] Different from traditional video coding methods, DVC transfers modules with complex operations (such as motion estimation, motion compensation, etc.) from the encoding end to the decoding end. Therefore, it can be applied in scenarios where the computing power, storage space, and power consumption resources of the encoding end are all limited. DVC generally adopts intra-frame coding and inter-frame decoding methods to divide video frames into key frames and remaining frames. Use the traditional video coding method to encode and decode the key frame, and use DVC to realize the encoding and decoding of the remaining frames. [0003] Currently, most DVC schemes use channel coding to code and decode the remaining frames. Although channel co...

AI Technical Summary

Problems solved by technology

[0005] The invention realizes the code rate control of DVC without feedback, and solves the technical problem that the video coding scheme based on channel coding has poor decoding performance on medium and short length sources

Images