Deblocking filter for video coder and implementation method thereof

Abstract

The invention discloses a deblocking filter for a video coder and an implementation method thereof. The method comprises the following steps: mapping each filtering function of the deblocking filter of the video coder described by the high level program language algorithm into the hardware logic description formed by operator units; and generating a hardware integrated circuit of the deblocking filter by the hardware logic description formed by the operator units. By applying the invention, a system engineer can realize fast mapping from the deblocking filtering algorithm described by the high level language to a hardware circuit at the lower layer according to a complete operator cell library capable of supporting the description of the high level language algorithm, thereby finishing the fast design of the deblocking filter integrated circuit. Moreover, the deblocking filter and other application specific integrated circuit (ASIC) parts in the video coder can perform parallel flow operation, thereby increasing the design speed of the ASIC of the video coder. The deblocking filter can be suitable for different video coder structures and has good universality.

Description

technical field [0001] The present invention relates to digital video processing technology, in particular, to a deblocking filter for a video encoder and its implementation method. Background technique [0002] Integrated circuit design methodology is a methodology used to guide integrated circuit design. The current integrated circuit design, especially the large-scale integrated circuit design, its common design process is: the system engineer proposes the system function framework according to the functional requirements, and the software engineer uses the computer advanced programming language (such as: Java, C, C++, Matlab, etc.) Describe the functional framework of the system to obtain the algorithm description of the high-level programming language of the integrated circuit; then the integrated circuit design engineer uses the hardware description language (such as: Verilog, VHDL, etc.) to synthesize the algorithm description into a netlist file, and then uses a spec...

AI Technical Summary

Problems solved by technology

In particular, the current life cycle of electronic products is less than one year, how to design new electronic products as much as possible has become a problem for manufacturers to solve

There are two reasons for this: the most important reason is the discrete cosine transform (DCT) transformation based on the block-based intra-frame and inter-frame prediction residuals. The quantization process of the transform coefficients is relatively rough, so the transformation restored by the inverse quantization Coefficients are also biased, causing visual discontinuities on image patch boundaries

The second reason comes from block motion compensation prediction. In the case of multiple reference frames, the reference data required for motion compensation of different sub-blocks is selected from which reference frame to copy according to the residual energy, so that The reference data near the boundary of two adjacent sub-blocks may come from different reference frames

[0007] Therefore, the existing ASIC design method for deblocking filter still needs to be improved and improved

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