Nagori, Soyeb and Rao, Ajit and Ramakrishnan, KR (2007) Perceptually motivated Rated Controller for Video coding. In: IET International Conference on Visual Information Engineering 2006 VIE 2006, 26-28 Sept. 2006, Bangalore, India.
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Rate control regulates the instantaneous video bit -rate to maximize a picture quality metric while satisfying channel constraints. Typically, a quality metric such as Peak Signalto-Noise ratio (PSNR) or weighted signal -to-noise ratio(WSNR) is chosen out of convenience. However this metric is not always truly representative of perceptual video quality.Attempts to use perceptual metrics in rate control have been limited by the accuracy of the video quality metrics chosen.Recently, new and improved metrics of subjective quality such as the Video quality experts group's (VQEG) NTIA1 General Video Quality Model (VQM) have been proven to have strong correlation with subjective quality. Here, we apply the key principles of the NTIA -VQM model to rate control in order to maximize perceptual video quality. Our experiments demonstrate that applying NTIA -VQM motivated metrics to standard TMN8 rate control in an H.263 encoder results in perceivable quality improvements over a baseline TMN8 / MSE based implementation.
|Item Type:||Conference Paper|
|Additional Information:||Copyright 2006 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.|
|Keywords:||Video Rate control;perceptual criteria;VQM;subjective quality;NTIA VQM model|
|Department/Centre:||Division of Electrical Sciences > Electrical Engineering|
|Date Deposited:||24 Nov 2011 06:44|
|Last Modified:||24 Nov 2011 06:44|
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