Block elimination filtering method and device for video encoding and decoding system

Abstract

The invention relates to a deblocking filter method in a video coding / decoding system. The invention aims to solve the problems in the prior art, such as unreasonable configuration between on-chip cache utilization rate and read / write frequency of out-chip memory and low concurrence level of read / write and filter calculation of out-chip memory. The invention discloses a deblocking filter method in a video coding / decoding system and a device thereof. The inventive deblocking filter method in the video coding / decoding system is based on half prefetching macro-block data technique and macro-block data monocycle post-write technique, enables the on-chip buffer to read macro-block data from the out-chip memory, and realizes the concurrent execution of filter intensity coefficient calculation and pixel filter calculation. The invention also discloses a device for implementing the above method. The invention has the advantages that: the invention keeps the balance between the on-chip cache utilization rate and read / write frequency of out-chip memory, reduces the complexity of filter calculation, and realizes the highly concurrent execution between the read / write operation of out-chip memory and the on-chip deblocking filter calculation operation.

Description

technical field [0001] The invention relates to a video encoding and decoding system, in particular to a deblocking filtering technique in the video encoding and decoding system. Background technique [0002] The current mainstream video coding and decoding methods and standards all adopt hybrid coding schemes based on block transform. In these encoding and decoding methods, artificial "blocking effects" will appear in the image reconstructed after inverse transformation and inverse quantization by the decoder. This is because the algorithm based on motion compensation is in units of blocks (4×4 or 8×8 pixel size), and the DCT transformation and quantization of intra / inter prediction residuals are also in units of blocks (4×4 or 8×8 Pixel size) is operated in units. By performing deblocking filtering on the decoded and reconstructed image and filtering the inner boundary of each block, this block effect can be effectively removed. [0003] The process of deblocking filter...

AI Technical Summary

Problems solved by technology

[0014] The technical problem to be solved by the present invention is that the present invention aims at the unreasonable configuration between the usage rate of the on-chip cache and the number of reads and writes to the off-chip memory in the existing deblocking filter technology, and the unreasonable configuration between the read and write of the off-chip memory and the filtering operation. The shortcoming of the low parallelism, provide a kind of deblocking filtering method and its device in the video codec system

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