Multi-format HD video decoder structure capable of decoding by combining software and hardware for decoding

Abstract

The invention relates to the technical field of multimedia videos, and discloses a multi-format HD video decoder structure capable of decoding by combining software and hardware. The structure is composed of a programmable processor and a coprocessor which are adopted for decoding together, wherein a software decoding part is completed by the programmable processor; the programmable processor completes the analysis on grammatical hierarchies above video standard medium strips and controls the decoding process of the coprocessor. The very large scale integrated circuits (VLSI) of an AVS and MPEG-2 decoder based on the structure of the invention realizes decoding AVS and MPEG-2 full HD videos in real time under the 0.18 micron process; and simultaneously, the decoder has smaller chip area and power consumption and lower cost.

Description

technical field [0001] The invention relates to the field of multimedia video, in particular to a multi-format high-definition video decoder structure for joint decoding of software and hardware. Background technique [0002] Video decoders for different application fields often have different structures, and decoders with different structures have different characteristics. To determine the structure of the decoder, three aspects need to be considered. The first is performance, high-resolution video applications It is the future development trend, and high-definition video puts forward very strict requirements on the performance of the decoder. The second is compatibility, how the decoder is ingeniously compatible with various mainstream video standards, which is conducive to shortening the development cycle of the decoder and reducing the area and cost of the decoder. The third is cost and power consumption. Due to increasingly fierce market competition, the cost of the d...

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Problems solved by technology

The third is cost and power consumption. Due to the increasingly fierce market competition, the cost of the decoder itself and the cost of the system need to be considered in the decoder design process. The power consumption of the decoder is also a factor that needs to be considered in the decoder design process.

The advantage of this kind of decoder is that it is relatively good in compatibility, portability, and upgradeability, but even under the most advanced semiconductor technology, it is still difficult for high-performance processors to overcome the huge power consumption and high cost of chip manufacturing and packaging. Disadvantages such as cost

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 video decoding, and the area and power consumption of the decoder are relatively small; but the hardware decoding The disadvantage of the device is that it is less flexible and it is difficult to support multiple video standards

[0006] The MPEG-2 standard is currently the mainstream digital TV standard, which has the advantages of low complexity and low implementation cost, but the compression performance is not as good as AVS and other video standards

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