Overview of Rate Control Algorithms in Mainstream Video Coding Standards

As the product of the high development of digital information technology, video can carry a very considerable amount of information. However, due to its own characteristics, there is often a large amount of information redundancy between and within frames. Through video coding, the redundancy in video can be eliminated by means of compression and coding, which can greatly optimize the storage and transmission process of video. As an important tool in video coding, rate control plays an important role in adapting the output stream and transmission channel bandwidth of the encoder, and has a strong practical application value. In view of the rate control algorithm, the current international mainstream coding standards have done fine design according to the characteristics of their own coding structure. In this paper, the rate control algorithms in HEVC/H.265, VVC/H.266 and AVS2 are described in detail.