Abstract
Since motion in an image sequence is non-stationary, perceived image quality can be improved by an adaptive frame rate control in accordance with statistics on its motion when the sequence is compressed and transmitted in a band-width-limited network. The authors have proposed an adaptive frame insertion technique for image sequences. However, the technique often gives motion jerkiness at a frame-rate transition point in an almost constant-motion section, which requires further improvement. This paper thus proposes a new adaptive frame interval control technique that gives high subjective image quality. A MOS estimation technique is also presented by investigating the relation between the subjective image quality of resulting sequences and their average frame rate. The effectiveness of the proposed technique is finally evaluated through some experimental results.
