Entropy coder and realization method thereof

Abstract

The invention provides an entropy coding structure and a realization method, which belong to the technical field of digital video coding and decoding. In the invention, the whole entropy coder is divided into two stages of assembly line structures, and the generation and coding of macro block header parameters are finished in different assembly line stages, so waiting time is avoided, and simultaneously, coding time is rationally distributed. A single-path assembly line hardware structure is adopted in each stage of assembly line, and compared with the conventional multipath parallel structure, the plurality of stages of assembly line structures adopted by the whole variable length coding module finish the operations of one stage only within 1 hour, and the entropy coder provided by the invention can finish once variable length coding in 1 hour; and simultaneously, sequentially coded macro block header information and residual coefficients multiplex a set of Columbus coding and code stream splicing device, so hardware cost is saved, and resource utilization rate is increased. In addition, unified laying-out is performed on a variable length coding (VLC) code table used by the variable length coding, and the using number of random access memories (RAM) is reduced.

Description

technical field [0001] The invention belongs to the technical field of digital video encoding and decoding, and in particular relates to an entropy encoding hardware design method. Background technique [0002] Since the 1990s, digital video compression technology has been widely used in communications, personal computers, radio and television, consumer electronics and other fields, and it can be called the core technology of the digital media industry. The source coding standard represented by MPEG-2 has achieved great success. Since entering the new century, a new generation of source coding standards represented by H.264 / AVC and AVS has emerged. The AVS standard is a source coding standard with independent intellectual property rights in my country. In February 2006, the AVS video standard was officially approved as a national standard and entered the stage of industrial promotion. Since the main application object of the AVS video standard is standard-definition / high-...

AI Technical Summary

Problems solved by technology

Since the main application object of the AVS video standard is standard-definition / high-definition television, the computational complexity of the encoding process is relatively large, which poses a challenge to the hardware design of the encoder.

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