Video quality estimation apparatus, video quality estimation method, frame type determination method, and recording medium

A video quality estimation apparatus for estimating, based on TS packets, video quality of video communication which converts an elementary stream into TS packets and transmits the TS packets, the elementary stream being obtained by compression-coding a video signal into a plurality of kinds of frames, comprising:

• a storage unit which stores a frame structure of the elementary stream;
• a frame type determination unit which counts, as a frame data amount of each frame, the number of TS packets included in the frame based on a frame start position included in an input TS packet of the video communication, and determines a frame type based on a large/small relationships between the frame data amounts of the frames;
• and
• a video quality estimation unit which estimates the video quality of the video communication based on the frame type of each frame obtained by said frame type determination unit, the frame structure of the elementary stream read out from the storage unit, and a TS packet loss state detected from the TS packets of the video communication.

A recording medium recording a program for a video quality estimation apparatus which includes an arithmetic processing unit and a storage unit and estimates, based on TS packets, video quality of video communication which converts an elementary stream into TS packets and transmits the TS packets, the elementary stream being obtained by compression-coding a video signal into a plurality of kinds of frames, the program causing a computer of the video quality estimation apparatus to execute:

• the storage step of causing the storage unit to store a frame structure of the elementary stream;
• the frame type determination step of causing the arithmetic processing unit to count, as a frame data amount of each frame, the number of TS packets included in the frame based on a frame start position included in an input TS packet of the video communication, and determine a frame type based on a large/small relationships between the frame data amounts of the frames;
• and
• the video quality estimation step of causing the arithmetic processing unit to estimate the video quality of the video communication based on the frame type of each frame obtained in the frame type determination step, the frame structure of the elementary stream read out from the storage unit, and a TS packet loss state detected from the TS packets of the video communication.