Image bandwidth reduction using adaptive ternary delta modulation with frame difference prediction

Predictive CAQ (constant area quantization) has been applied to interframe image bandwidth compression using computer simulation. For the type of images studied it has been demonstrated that a simple prediction algorithm based on frame differences can be used to produce significant improvement in picture quality as well as bit rate reduction as compared to 2-dimensional ATDM. Alternate line ATDM provides a further reduction in data rate at the expense of a slightly degraded image. A pseudo real time image evaluation facility has been developed to allow studies of various image coding schemes to be carried out on a general purpose computer whilst allowing the resulting sequence of images to be viewed at real time rates