Patent ID: 7965203
Filing Date: 2011-06-21
Classification: H04N

Abstract:
1. A video quality estimation a apparatus comprising: parameter extraction unit extracts, as main parameters including an input coding bit rate and an input frame rate, respectively, audiovisual medium parameters including a coding bit rate representing the number of coding bits per unit time and a frame rate representing the number of frames per unit time of an audiovisual medium encoded into plurality of frames; an estimation model specifying unit which specifies, on the basis of the main parameter corresponding to one parameter of the audiovisual medium parameter, an estimation model representing a relationship between subjective video quality and the other parameter of the audiovisual medium parameters; a video quality estimation unit which estimates subjective video quality corresponding to the main parameter corresponding to said one parameter by using the specified estimation model and outputs the subjective video quality as an estimation value of subjective video quality a viewer actually senses from the audiovisual medium received via a communication network and reproduced on an arbitrary terminal; wherein the main parameter corresponding to said one parameter includes the input coding bit rate, and said other parameter includes the frame rate; and wherein-said estimation model specifying unit comprises an optimum frame rate calculation unit which calculates an optimum frame rate representing a frame rate corresponding to best subjective video quality of the audiovisual medium transmitted at the input coding bit rate, a best video quality calculation unit which calculates best video quality corresponding to a best value of the subjective video quality of the audiovisual medium transmitted at the input coding bit rate, and an estimation model generation unit which generates the estimation model on the basis of estimation model specifying parameter including the optimum frame rate and the best video quality.