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Proceedings Paper

Buffer control technique for video coding
Author(s): Giancarlo Calvagno; C. Ghirardi; Gian Antonio Mian; R. Rinaldo
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Paper Abstract

In this work we develop an adaptive scheme for quantization of subband or transform coded frames in a typical video sequence coder. Using a simple statistical model for the subband or transform coefficients, we present a procedure to determine the optimum dead-zone quantizer for a given entropy of the quantizer output symbols. We find that, at low bit rates, the dead- zone quantizer offers better performance than the uniform quantizer. The model is used to develop an adaptive procedure to update the quantizer parameters on the basis of the state of a channel buffer with constant output rate and variable input rate. Experimental results show that the model can be effectively used in a practical scheme for buffer control.

Paper Details

Date Published: 17 February 1995
PDF: 10 pages
Proc. SPIE 2451, Advanced Image and Video Communications and Storage Technologies, (17 February 1995); doi: 10.1117/12.201207
Show Author Affiliations
Giancarlo Calvagno, Univ. di Padova (Italy)
C. Ghirardi, Univ. di Padova (Italy)
Gian Antonio Mian, Univ. di Padova (Italy)
R. Rinaldo, Univ. di Padova (Italy)


Published in SPIE Proceedings Vol. 2451:
Advanced Image and Video Communications and Storage Technologies
Naohisa Ohta; Heinz U. Lemke; Jean Claude Lehureau, Editor(s)

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