MPEG multi-format compatible decoding method based on software and hardware coprocessing and device thereof

Abstract

The invention discloses an MPEG multi-format compatible decoding method based on software and hardware coprocessing and a device thereof. The device comprises a processor and a hardware accelerator, wherein a register configuration interface between the processor and the accelerator supports the MPEG-1 / 2 / 4 standard. The hardware accelerator comprises a sub-pixel interpolation module, a discrete cosine inverse transformation module, a motion compensation module and a DMA controller module, wherein the sub-pixel interpolation module is used for carrying out sub-pixel interpolation operation to read-in reference macro block data; the discrete cosine inverse transformation module is used for carrying out two-dimensional discrete cosine inverse transformation treatment on residual data; the motion compensation module is used for reconstructing a decoding macro block by a sub-pixel interpolation operation result and treated residual data; and the DMA controller module is used for calculating the reference block data reading position, reading the reference block data from a reference frame and writing the reconstructed macro block into the corresponding position address of a reconstructed frame. The invention realizes MPEG multi-format compatible decoding.

Description

technical field [0001] The invention relates to digital image coding and decoding technology, in particular to an MPEG multi-format compatible decoding method and device based on software and hardware co-processing. Background technique [0002] MPEG-1 / 2 / 4 is a digital audio and video compression coding standard formulated by the International Organization for Standardization ISO / IEC. At present, it is widely used in the fields of communication, computer and consumer electronics. The decoding process of MPEG-1 / 2 / 4 is consistent, including cores such as inverse transformation (such as Inverse DCT), inverse quantization (Inverse Quantization), entropy decoding (Variable Length Decoding) and motion compensation (Motion Compensation) Algorithm, now take a typical MPEG-2 as an example to introduce the video decoding process, such as figure 1 shown. [0003] According to the division of software and hardware implementation, video decoding methods can be roughly divided into: ful...

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Problems solved by technology

[0010] The technical problem to be solved by the present invention is to provide a MPEG multi-format compatible decoding method and device based on software and hardware co-processing, which is used to solve the problem that the existing technology cannot meet Realize the real-time decoding and display of standard-definition coded video streams at a lower operating frequency, while reducing chip area and power consumption at the same decoding efficiency

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