Universal multi-core parallel decoder system and application thereof

Abstract

The invention discloses a universal multi-core parallel decoder system and application thereof, and relates to the technical field of video decoding. The system comprises decoding firmware and a multi-core hardware decoding accelerator which are in communication connection, and Slice-level data in a video code stream serves as an interaction unit between the decoding firmware and the multi-core hardware decoding accelerator; the decoding firmware is used for analyzing non-entropy coded data on the upper layer of a video code stream, and the multi-core hardware decoding accelerator is used forprocessing a decoding task of a macro block layer in the video code stream; the multi-core hardware decoding accelerator comprises a preprocessor module and at least two isomorphic full-function hardware decoders, wherein the preprocessor module is used for entropy decoding tasks of video code streams; and each full-function hardware decoder is responsible for decoding one macro block row, and atleast two macro blocks are spaced between the macro blocks which are being decoded in two adjacent uplink and downlink. The degree of parallelism is not limited by the number of bar / slice partitions,universal decoding is realized, the expandability is good, and the parallel processing efficiency is high.

Description

technical field [0001] The invention relates to the technical field of video decoding, in particular to a general multi-core parallel decoder system and its application. Background technique [0002] In the "Ultra HD Video Industry Development Action Plan (2019-2022)" issued in 2019, it is clearly stated that the development of the UHD video industry and the application of related fields will be vigorously promoted in accordance with the overall technical route of "4K first, taking into account 8K". . Accelerating the development of the ultra-high-definition video industry is of great significance to driving the intelligent transformation of 5G, security and other industries with video as an important carrier, as well as improving the overall strength of my country's information industry and cultural industry. The ultra-high-definition video technology naturally puts forward higher requirements for video codec processing. For high-definition video, the current mainstream v...

AI Technical Summary

Problems solved by technology

[0008] However, the above decoding scheme has the following defects: for the first decoding scheme, because the number of B frames between P frames is usually small, the degree of parallelism is not high; at the same time, in some protocol standards, B frames may be used as Reference frame, this type of B frame cannot be decoded in parallel with the above Frame

[0010] However, the 2D-Wave algorithm has the following defects: On the one hand, since the entropy decoding is completely serial (the entropy decoding of each macroblock in the Slice is related to its previous macroblock), the first downlink macroblock needs to obtain its On-site information after decoding the last macroblock of the previous row; on the other hand, the code stream data in the Slice is completely serial, and the code stream data corresponding to the first downstream macroblock also needs to wait for the last macroblock of the previous row It can only be presented after decoding, which affects the efficiency of parallel processing to a certain extent.

[0011] To sum up, the existing parallel decoding schemes cannot achieve comprehensiveness in terms of versatility, scalability, parallelism, and parallel processing efficiency, and often can only achieve multi-core parallelism on the encoding stream within a certain framework. It is an urgent technical problem to provide a general-purpose multi-core parallel decoding scheme whose parallelism is not limited by the number of Slice / Tile divisions in a frame, good scalability, and strong versatility.

Images