Evaluation of a Tolerance of a Picture Distortion for Distance Learning using DV Movies

In this paper, a tolerance of distortion in picture quality was investigated quantitatively for a distance learning using a DV(Digital Video) movie. The subjective evaluations were made for a face-to-face type and a presentation type of lectures. By factor analysis, the five factors were obtained: "the picture quality", "the sensation of presence", "the comprehensibility", "the advantage of a distance learning", and "the teaching content".