Video data compressing/decompressing method and system

Abstract

The invention provides a video data compressing / decompressing method and a video data compressing / decompressing system. The compressing method comprises the following steps of dividing video data in a storage into a plurality of basic units with uniform specification, wherein each basic unit comprises at least one data block; reading the basic units; compressing the read basic units and outputting the compressed data of the basic units; compressing and encoding the data blocks in the read basic units in parallel, and acquiring the compressed data of each data block; and outputting the compressed data of each data block so as to acquire the compressed data of each basic unit. The compression and decompression on the video data which can be randomly accessed are realized by the method and the system. By the scheme, the transmission bandwidth of the video data in a multimedia ASIC (Application Specific Integrated Circuit) design can be effectively reduced, and meanwhile, the internal storage space for storing the data can be saved.

Description

technical field [0001] The invention belongs to the technical field of video processing, and in particular relates to a video data compression / decompression method and system. Background technique [0002] The focus of existing video data compression method design is mainly on the efficiency of data compression, which is mainly used in the field of video data storage and transmission, and the purpose is to reduce the space required for video data storage and the bandwidth required for video data in the network transmission process . [0003] However, in multimedia ASIC design, the main bandwidth requirements and bandwidth bottlenecks inside the ASIC are concentrated in the reading and writing phase of video data, such as writing out reconstructed video image data obtained from video decoding, displaying reconstructed image data obtained from video decoding, etc. Occupies a large amount of on-chip bandwidth resources. If the output video data is compressed and encoded befor...

AI Technical Summary

Problems solved by technology

[0004] Existing video data compression methods designed with compression efficiency as the design goal will naturally lead to strong data correlation between the contexts of the compressed data, and it is difficult to achieve small-scale compression accuracy down to the macroblock level or even the block level. Random access to video data, so it is difficult to apply to the above occasions

[0005] In addition, the existing video data compression methods designed with compression efficiency as the design goal, because the compressed data between the blocks are related to each other, the sizes of the generated code streams are also different, and it is difficult to achieve complete parallel compression between the coding unit blocks and seamless stream assembly

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