Very low bit rate foveated video coding for H.263
نویسندگان
چکیده
Recently, foveated video has been introduced as an important emerging method for very low bit rate multimedia applications [1][2]. In this paper, we develop several rate control algorithms, and measure the performance of foveated video. We utilize H.263 video, and compare the performance with regular video based on the SNRC (signalto-noise ratio in curvilinear coordinates). In order to maximize compression, we use a maximum quantization parameter (QP = 31) for the regular video, and code a foveated video sequence at the equivalent bit rate. In simulation, we improve the PSNRC to 3.64 (1.62)dB under 30 (14) Kbits/sec for P pictures in CIF "News" ("Akiyo") standard video sequence.
منابع مشابه
Foveated video compression with optimal rate control
Previously, fovcated video compression algorithms have been proposed which, in certain applications, deliver high-quality video at reduced bit rates by seeking to match the nonuniform sampling of the human retina. We describe such a framework here where foveated video is created by a nonuniform filtering scheme that increases the compressibility of the video stream. We maximize a new foveal vis...
متن کاملMotion Estimation and Compensation of H.263 Video via Foveation
The human visual system (HVS) samples the external world non-uniformly. Utilizing this property in video compression, more bits can be allocated around the point of xation, i.e. the foveation point, to produce low bit rate foveated video. For the same bit rate, foveated video will have higher subjective quality compared to unfoveated video for a single observer. Utilizing the foveation property...
متن کاملA 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 کاملRate Control for Foveated MPEG/H.263 Video
Given a set of target bits, video rate control algorithms that use Lagrange multipliers have been generally known as an optimal solution for maximizing the picture quality in uniform spatial domain. Even if the SNR(signa1to-noise) of a picture is maximized by the rate control scheme, the visual quality can be enhanced using a suitable algorithm for the human visual system. In this paper, we est...
متن کاملH.263+: video coding at low bit rates
In this tutorial paper, we discuss the ITU-T H.263+ (or H.263 Version 2) low-bit-rate video coding standard. We first describe, briefly, the H.263 standard including its optional modes. We then address the 12 new negotiable modes of H.263+. Next, we present experimental results for these modes, based on our public-domain implementation (see our Web site at http://spmg.ece.ubc.ca). Tradeoffs amo...
متن کامل