Análise do processo de codificação aritmética binária adaptativa ao contexto dos padrões H.264 e HEVC

Abstract

Applications that use digital videos are increasingly present in our daily lives, their use has been increasing due to the easy access, and also by the increase of quality, which can be experienced in smartphones, smart TVs, video games and other supported devices. However, to be possible the processing, storage and streaming of video content, it is necessary to compress the data that represent them. The HEVC is the state-of-theart video coding standarda and it was developed with the goal of doubling the coding efficiency over its predecessor H.264. The video encoder have several modules. Among these modules there is the entropy encoder, responsible for the bitstream generation. The HEVC entropy coding standard consists in the context-adaptive binary arithmetic coding (CABAC), while H.264 has also the context-adaptive variable length coding (CAVLC). This work presents a extended review of the entropy encoders in the HEVC and H.264 standards. Moreover, presents related works and evaluation of the behavior of this module, using the reference software of the respective standards. These evaluations verifies the possibility of using parallel techniques in the entropy coding of both standards.