Multimedia information decoding method and device

Abstract

The invention relates to a multimedia information decoding method and device, belonging to the technical field of multimedia. The method comprises the following steps: generating a Boolean array according to at least one element in a first matrix; generating a first value according to a column subscript of the last non-zero element column in the first matrix; generating a second value according to a row subscript of the last non-zero element row in the first matrix; generating a second matrix which has the same side length as the first matrix; if both the first value and the second value are not equal to zero, cyclically performing operation in the Boolean array based on the second matrix to obtain the circulated second matrix; and generating a third matrix, and cyclically performing operation in the third matrix to obtain decoded residual blocks. According to the multimedia information decoding method and device disclosed by the invention, the residual blocks are sequentially subjected to two-dimensional discrete cosine transform and lossy compression to obtain the first matrix, the first matrix is subjected to inverse two-dimensional discrete cosine transform, and the zero-related multiplication is omitted so as to ensure that the purpose of reducing the amount of calculation can be achieved, the performance of computers can be improved, and the service life of the computers can be prolonged.

Description

technical field [0001] The present invention relates to the field of multimedia technology, in particular to a multimedia information decoding method and device. Background technique [0002] With the rapid development of multimedia technology, people put forward higher and higher requirements for the storage and compression of multimedia information at the transmitting end, as well as the decompression and display at the receiving end. At present, when multimedia information such as pictures or videos is displayed on a computer, the computer first loads the encoded multimedia information, and then decodes the loaded multimedia information, and displays the decoding result on the screen. Usually, when a computer decodes loaded multimedia information, it will perform an inverse two-dimensional discrete cosine transform. [0003] Related technologies When the reverse two-dimensional discrete cosine transform is performed in the decoding process, the computer will convert the ...

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Problems solved by technology

[0005] When the computer decodes the loaded multimedia information, there will be a large number of multiplication operations in the matrix operations and integer operations involved in the above-mentioned inverse two-dimensional discrete cosine transform, which makes the CPU of the computer or other SIMD instructions provided. Therefore, when the computer displays multimedia information, it will occupy a large amount of computing resources, resulting in a decrease in the performance of the computer and shortening the service life of the computer.

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