An Interframe Coding Scheme for Packet Video

A. Puri; R. Aravind

doi:10.1117/12.970171

1 November 1989 An Interframe Coding Scheme for Packet Video

A. Puri, R. Aravind

Proceedings Volume 1199, Visual Communications and Image Processing IV; (1989) https://doi.org/10.1117/12.970171
Event: 1989 Symposium on Visual Communications, Image Processing, and Intelligent Robotics Systems, 1989, Philadelphia, PA, United States

Abstract

Interframe coding schemes though sensitive to the propagative affects of channel-errors, are much more efficient than intraframe coding schemes, when using similar data-compression techniques. Moreover, since in interframe coding, the instantaneous data-rate may vary drastically, it can benefit from the bits-on-demand property of packet-networks. We propose a layered coding-structure that contains a self-contained basic inter-frame codec as the core, and supplementary additive extended-codecs. The inter-frame codec uses a slightly modified version of motion-compensated DCT coding scheme proposed by the CCITT in reference model 8 for pX64kbit/ s videophone. It encodes the lower spatial resolution image sequence, with an adequate temporal resolution. The encoded-data it produces is assigned the highest priority. The extended-codecs allow enhancement of temporal and spatial resolutions, at the cost of increase in the data-rate. They encode the interpolative differences between the upsampled local decoded output of the basic-codec and the higher resolution input. The encoded-data of the extended codecs is assigned lower priority.

Citation Download Citation

A. Puri and R. Aravind "An Interframe Coding Scheme for Packet Video", Proc. SPIE 1199, Visual Communications and Image Processing IV, (1 November 1989); https://doi.org/10.1117/12.970171

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