Video Quality Estimation Apparatus, Method, and Program

A video quality estimation method characterized by comprising:

• the parameter extraction step of causing a parameter extraction unit to extract, 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 a plurality of frames;
• the estimation model specifying step of causing an estimation model specifying unit to specify, on the basis of the main parameter corresponding to one parameter of the audiovisual medium parameters, an estimation model representing a relationship between subjective video quality and said other parameter of the audiovisual medium parameters;
• and
• the video quality estimation step of causing a video quality estimation unit to estimate subjective video quality corresponding to the main parameter corresponding to said one parameter by using the specified estimation model and output 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.

A program for causing a computer of a video quality estimation apparatus which calculates, for audiovisual communication to transmit an audiovisual medium encoded into a plurality of frames to an arbitrary terminal via a communication network, an estimation value of subjective video quality a viewer actually senses from the audiovisual medium reproduced on the terminal by using a predetermined estimation model, to execute:

• the parameter extraction step of causing a parameter extraction unit to extract, 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 the audiovisual medium;
• the estimation model specifying step of causing an estimation model specifying unit to specify, on the basis of the main parameter corresponding to one parameter of the audiovisual medium parameters, an estimation model representing a relationship between subjective video quality and said other parameter of the audiovisual medium parameters;
• and
• the video quality estimation step of causing a video quality estimation unit to estimate subjective video quality corresponding to the main parameter corresponding to said one parameter by using the specified estimation model and output 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.