Patent Document ID: 20090225170
Application ID: 11886406
Patent Flag: 0

Claim One:
1. A video quality estimation apparatus characterized by comprising: a parameter extraction unit which extracts, as main parameters, an input coding bit rate representing the number of coding bits per unit time, an input frame rate representing the number of frames per unit time, and an input packet loss rate representing a packet loss occurrence probability of an audiovisual medium encoded into a plurality of frames; a first storage unit which stores reference subjective video quality representing subjective video quality of the audiovisual medium encoded at the input coding bit rate and the input frame rate without packet loss; a degradation model specifying unit which specifies a degradation model representing a relationship between the input packet loss rate and degradation in the reference subjective video quality on the basis of the input coding bit rate and the input frame rate; and a video quality correction unit which corrects the reference subjective video quality on the basis of a video quality degradation ratio corresponding to the input packet loss rate, which is calculated by using the specified degradation model, thereby calculating 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.