On optimal coding of visual information for Rate-Controlled communication

A new approach to rate-control of visual communication is presented. This method is based on a recently introduced rate-distortion function for image compression. We show that this rate-distortion approach can be used to develop an efficient coding algorithm, suitable for wireless and Internet transmission. We demonstrate this approach for subband transform coding using the discrete cosine transform (DCT). We show how rate-control is performed both for still images and for video streams. Simulation results are presented to support the efficiency of our algorithm, which outperforms presently available compression methods.