Techniques for video transport at the ISDN basic rate
T.L. Mitchell, Steven Langley Blake · NCSU Libraries Repository (North Carolina State University Libraries) · 1992
Substantial image data rate compression is necessary to support moderate resolution full motion color video transmission at the ISDN basic rate.Issues in digital image representation and error measures are introduced.An overview of dierential, transform, subband, and vector quantization coding of images is presented, including comparisons and performance gures.In addition, techniques for removing temporal redundancy, including conditional replenishment and motion compensated predictive coding, are discussed.Performance requirements and design issues for video teleconferencing codecs are introduced.It is shown that compression on the order of 0:3 bit/pel is required for this application.Motion compensated predictive coding techniques utilizing either adaptive DCT or vector quantization coding of the prediction errors have been proposed which can achieve the required compression levels.Due to hardware implementation constraints, motion compensated adaptive DCT coding is preferred.A detailed overview of the CCITT p 64 kbps video teleconferencing standard is provided.It is shown that this standard provides adequate video coding performance while incorporating features that will allow the implementation of an integrated communications architecture supporting voice, video, image, and data.