Perceptually motivated bit-allocation for H.264 encoded video sequences
نویسندگان
چکیده
This work presents a new perceptually motivated bit allocation strategy for Region of Interest (ROI) coding in video sequences. It is not possible to assure any minimum target foreground quality in the approaches reported so far in the literature. In our proposed strategy reported herein, the bit-allocation is based on a target quality for the foreground and allowing perceptually tolerable graceful quality degradation for the background within the specified bit-rate constraint. In cases where it is difficult to satisfy the target foreground quality within the bit rate constraints, the closest possible quality is assured. Our algorithm is implemented on the H.264/AVC standards. Results on some standard video sequences are presented and these are very encouraging.
منابع مشابه
A Full-Fuzzy Rate Controller for Variable Bit Rate Video
In this paper, we propose a new full-fuzzy video ratecontrol algorithm (RCA) for variable bit rate (VBR) videoapplications. The proposed RCA provides high qualitycompressed video with a low degree computational complexity.By controlling the quantization parameter (QP) on a picturebasis, it produces VBR video bit streams. The proposed RCAhas been implemented on the JM H.264/AVC video codec andth...
متن کاملRegion Based Minimization of Quantization Error Propagation in Variable Bitrate Video
A bit allocation method is proposed to minimize the propagation of quantization error and thereafter to increase the average quality of encoded video in variable bitrate video applications. In comparison with constant bitrate video, a variable bitrate video can provide better visual quality and coding efficiency for compressed video. Furthermore, while more variation in bitrate is possible we h...
متن کاملالگوریتم کنترل نرخ بیت متغیر ویدئو در سطح گروه تصاویر برای استاندارد فشردهسازی H.265
A rate control algorithm at the group of picture (GOP) level is proposed in this paper for variable bit rate applications of the H.265/HEVC video coding standard with buffer constraint. Due to structural changes in the HEVC compared to the previous standards, new rate control algorithms are needed to be designed. In the proposed algorithm, quantization parameter (QP) of each GOP is obtained by ...
متن کاملA Simple Adaptive Rate Control for H.264/AVC
The purpose of this paper is to improve allocation of the number of bits without skipping the frame by accurately estimating the target bits in H.264/AVC rate control. In our scheme, we propose an enhancement method of the target frame rate based H.264/AVC bit allocation. The enhancement uses a frame complexity estimation to improve the existing mean absolute difference (MAD) complexity measure...
متن کاملScalable resource allocation for H.264 video encoder: Frame-level controller
Tradeoff between different resources (bitrate, computational time, etc.) and compression quality, often referred to as rate-distortion optimization (RDO), is a key problem in video coding. With a little exaggeration, it can be claimed that what distinguishes between a good and a bad codec is how optimally it finds such a tradeoff. This is the second part of our paper presenting an algorithm for...
متن کامل