Rate Control Scheme for Video Coding Using Low-Memory-Cost Look-Up Table

2006 ◽  
pp. 780-790
Author(s):  
Linjian Mo ◽  
Chun Chen ◽  
Jiajun Bu ◽  
Xu Li ◽  
Zhi Yang
Keyword(s):  
Video Coding ◽  
Rate Control ◽  
Look Up Table ◽  
Control Scheme ◽  
Memory Cost

scholarly journals Region-of-interest-based rate control scheme for high-efficiency video coding

2014 ◽  
Vol 3 ◽  
Author(s):  
Marwa Meddeb ◽  
Marco Cagnazzo ◽  
Béatrice Pesquet-Popescu
Keyword(s):  
Video Coding ◽  
Rate Control ◽  
Control Algorithm ◽  
High Efficiency ◽  
Region Of Interest ◽  
Bit Allocation ◽  
Bit Rate ◽  
High Efficiency Video Coding ◽  
Control Scheme ◽  
Rate Control Algorithm

This paper presents a novel rate control scheme designed for the newest high efficiency video coding (HEVC) standard, and aimed at enhancing the quality of regions of interest (ROI) for a videoconferencing system. It is designed to consider the different regions at both frame level and coding tree unit (CTU) level. The proposed approach allocates a higher bit rate to the region of interest while keeping the global bit rate close to the assigned target value. The ROIs, typically faces in this application, are automatically detected and each CTU is classified in a region of interest map. This binary map is given as input to the rate control algorithm and the bit allocation is made accordingly. The algorithm is tested, first, using the initial version of the controller introduced in HEVC test model (HM.10), then, extended in HM.13. In this work, we first investigate the impact of differentiated bit allocation between the two regions using a fixed bit rate ratio in intra-coded frames (I-frames) and Bidirectionally predicted frames (B-frames). Then, unit quantization parameters (QPs) are computed independently for CTUs of different regions. The proposed approach has been compared to the reference controller implemented in HM and to a ROI-based rate control algorithm initially proposed for H.264 that we adopted to HEVC and implemented in HM.9. Experimental results show that our scheme has comparable performances with the ROI-based controller proposed for H.264. It achieves accurate target bit rates and provides an improvement in region of interest quality, both in objective metrics (up to 2 dB in PSNR) and based on subjective quality evaluation.

A frame-level encoder rate control scheme for transform domain Wyner-Ziv video coding

2016 ◽  
Vol 76 (20) ◽  
pp. 20567-20585 ◽  
Author(s):  
Jian Chen ◽  
Shuai Zheng ◽  
Qing Hu ◽  
Yonghong Kuo
Keyword(s):  
Video Coding ◽  
Rate Control ◽  
Transform Domain ◽  
Control Scheme
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