AVS video decoder for software and hardware combined decoding

Abstract

The invention relates to the field of multimedia video, in particular to an AVS video decoder (information technology-advanced coding of audio and video) jointly decoded by software and hardware in video decoding. The video decoder comprises a DSP (digital signal processor) and a coprocessor which are adopted for joint decoding of software and hardware; DSP completes a software decoding part, completes analysis of an AVS protocol, generates various parameters required by decoding, and controls the decoding process of the coprocessor. Realization of VLSI (a very large scale integrated circuit) of a structure of the AVS video decoder jointly decoded by software and hardware can decode the AVS in a standard definition or a larger size image in real-time under a process of 0.18 micron; as DSP programming has large flexibility, the decoder structure is easy to be compatible with decoding of other standard video formats, meanwhile, the decoder has small chip area, power consumption and low cost.

Description

technical field [0001] The invention relates to the field of multimedia video, in particular to an AVS video decoder structure for joint decoding of software and hardware. Background technique [0002] AVS (Audio Video Coding Standard) standard is the abbreviation of "Information Technology Advanced Audio and Video Coding" series standards. It has independent intellectual property rights and is suitable for applications such as digital TV broadcasting and interactive storage media services. It has high compression rate and moderate complexity. Features such as low cost. The characteristic core technologies in AVS video include: 8x8 integer transformation, quantization, intra prediction, 1 / 4 precision pixel interpolation, special inter prediction motion compensation, two-dimensional entropy coding, block effect loop filtering, etc. Technical performance equivalent to international standards is achieved at lower complexity. [0003] AVS video decoder is a research hotspot. F...

AI Technical Summary

Problems solved by technology

The advantage of this kind of decoder is that it has good compatibility, portability and upgradeability, but due to the performance of DSP and CPU, it often cannot meet the real-time decoding of standard definition or larger image size video.

Moreover, the use of high-performance processors consumes more power and costs more

The second is a hardware decoder. The decoder adopts a full hardware design. The advantage of this kind of decoder is that it has relatively high performance and can meet the needs of high-definition image decoding. Moreover, for special video applications, the area overhead of the decoder is often higher than that of the DSP , CPU and other processors are much smaller, and the manufacturing cost is relatively low; but the disadvantage of the hardware decoder is that the compatibility, portability, and upgradeability are relatively poor, especially in the case of multi-standard coexistence, the decoder must have a good The multi-standard compatibility of

This decoder is smaller in area and power than a software decoder, but larger than a hardware decoder

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