Method, system and device for decoding videos

Abstract

The invention is suitable for the technical field of decoding videos and provides a method, a system and a device for decoding the videos. The method comprises the following steps of: performing decoding and reverse scanning on a data bit stream after video coding to acquire residual error coefficients; converting a first inverse quantization operation of a first video decoding standard into a second inverse quantization operation, and adopting the second inverse quantization operation to perform inverse quantization processing on the residual error coefficients, wherein devices adopted by the second inverse quantization operation and an inverse quantization operation of a second video decoding standard are same; performing saturation control on the coefficients after the inverse quantization processing; and performing inverse transformation operation on the coefficients obtained after the saturation control. Under the premise of ensuring the performance of a multimedia processor, themethod, the system and the device effectively save the chip area, simplify the control logic, and have strong transportability, and the method can be adopted to perform hardware multiplexing as long as the algorithms of inverse quantization parts of the two types of the video decoding standards are similar to each other.

Description

technical field [0001] The invention belongs to the technical field of video decoding, and in particular relates to a video decoding method, system and equipment. Background technique [0002] At present, mobile multimedia processors are widely used in various portable electronic products. The market requires more comprehensive video standards supported by multimedia processors. In terms of video decoding standards, it mainly includes Inverse Quantization (IQ) and Inverse Transformation (Inverse Quantization). DCT, IDCT), different video decoding standards have different dequantization processes, because for different video decoding standards, the algorithm of the IDCT part is the same, and the algorithm of the dequantization part is generally different. [0003] In the prior art, when video decoding is performed, the IDCT part is used for multiplexing, and the dequantization part is independent. Although hardware multiplexing can be achieved to a certain extent, when the su...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the embodiments of the present invention is to provide a video decoding method, which aims to solve the problem that the hardware multiplexing of the inverse quantization process cannot be realized in the prior art when the video decoding standards are different

Images