Patent
HEVC (High Efficiency Video Coding) CTU (Coding Tree Unit) grade code rate control method based on optimal bit allocation
Xu Mai,Shengxi Li,Chengzhang Ma,Wang Zulin +3 more
- 23 Mar 2016
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TL;DR: In this paper, an HEVC (High Efficiency Video Coding) CTU (Coding Tree Unit) grade code rate control method based on optimal bit allocation was proposed, and a recursive Taylor expansion algorithm was provided to solve the originally-unsolvable equation at a very high convergence speed.
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Abstract: The invention discloses an HEVC (High Efficiency Video Coding) CTU (Coding Tree Unit) grade code rate control method based on optimal bit allocation, and belongs to the field of video coding In particular, a new R-D estimation is provided to replace an existing R-lambda estimation, and an optimal bit allocation equation is deduced through the new R-D estimation, thereby realizing optimal bit allocation for an R-lambda code rate control model on a CTU Furthermore, a recursive Taylor expansion algorithm is provided to solve the originally-unsolvable equation at a very high convergence speed, thereby obtaining an approximate closed-form solution, and realizing optimal bit allocation Meanwhile, a method for performing optimal bit reallocation on remaining bits is provided through the recursive Taylor expansion algorithm The code rate control method is a first algorithm for realizing HEVC optimal bit allocation at very low coding complexity The code rate control method has the advantages of higher rate distortion, higher RC accuracy and higher robustness in dynamic picture change compared with other existing R-lambda code rate control models
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Citations
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Yang Yang,Jiang Jing,Sarkis Gabi,Huang Lou,Hari Sankar +4 more
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TL;DR: In this paper, a vector of bits using a polar code is encoded and the information bits of the vector are allocated to the polarized bit-channels based on the reliability metrics of the different polarized bitchannels and the overall capacity of a transmission.
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Zhao Yuanwei,Yuan Chengzong,Song Rui,Li Kejun,Li Yunsong,Wang Yangli +5 more
- 07 Jul 2017
TL;DR: In this paper, a code rate control method based on a subjective region of interest and time-space domain combination is proposed for HEVC (High Efficiency Video Coding), and the method comprises the following steps: calculating each CTU grade target bit allocation weight based on space domain; calculating a motion region of each frame of image based on light streams and a global motion estimation algorithm to serve as a time domain region of interests; adjusting the obtained CTU-level target-bit allocation weights according to a time-domain region-of-interest result obtained on the basis of the
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Bit allocations for encoding and decoding
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- 26 Mar 2020
TL;DR: In this paper, the authors describe methods, systems, and devices for encoding and decoding of a vector, where an encoder allocates information bits of the vector to channel instances of a channel that are separated into groups.
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Bit allocation for encoding and decoding
Jiang Jing,Sarkis Gabi,Yang Yang,Shrinivas Kudekar,Soriaga Joseph Binamira,Hari Sankar,Xu Changlong,Wei Chao +7 more
- 12 Jul 2018
TL;DR: In this article, the authors describe methods, systems, and devices for encoding and decoding of a vector, where an encoder allocates information bits of the vector to channel instances of a channel that are separated into groups.
1
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TL;DR: In this article, a rate control method based on a logarithm R-Q model and hierarchical bit allocation is proposed for video coding, which includes the first step of computing content complexity of a region to be encoded in an image and carrying out hierarchical bit assignment, the second step of using the log-rithm RLQ model to compute the quantifying step size of the region, the third step of completing the encoding process of one encoding unit, updating model parameters and then carrying out encoding on the next encoding unit until encoding of a whole video sequence is completed.
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Patent
Low-latency code rate control method and bit number distribution method suitable for HEVC
Wang Xiangwen,Yang Zhongzhu,Luo Zhengyi,Song Li +3 more
- 01 Oct 2014
TL;DR: In this paper, a low-latency code rate control method and bit number distribution method suitable for HEVC is proposed, where a bit feedback increment from the buffer area is introduced, a certain bit number is distributed to each frame in advance, and the basis of low latency is achieved.
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Patent
Code rate control model updating method based on HEVC standards
Mingkui Zheng,Su Kaixiong,Yang Xiuzhi,Lan Chengdong +3 more
- 23 Jul 2014
TL;DR: In this article, a code rate control model updating method based on HEVC standards is proposed, where the model parameters can be precisely updated, and therefore a more accurate code-rate control effect can be obtained.
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