Advanced Topics

Abstract

The issues investigated in previous chapters are primarily concerned with data rate and quality control for compressed digital video data transmitted through constant bit rate channels. In particular, the work has focused on the buffer-based quantiser control technique for MPEG video coding. An effort was made to improve performance of rate control techniques, in terms of video rate and PSNR, by devising a supervisory monitoring and control system. In order to achieve this goal, in Part II, a series of nonlinear signal processing techniques were applied to the MPEG video encoder; radial basis function network, fuzzy logic control and nonlinear quantiser control. The performance of these techniques was evaluated in both analytical and experimental ways. In this chapter, the main conclusions are highlighted. Advantages and limitations of the techniques are also discussed and contrasted. Finally, future directions of the work are discussed.