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Proceedings Paper

Hybrid Image Source Encoding For Real-Time Image Transmission
Author(s): G. Eichmann; R. Mammone; R. Stirbl; J. Keybl; R. Silber
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Paper Abstract

It is often convenient to transmit video signals over a data channel. However, when a signal is digitally encoded using PCM, the data rate is extremely high. For example, using a 4MHz bandlimited video signal, the data rate is often 48-64 Mbs. Further, typical film based image sensors generate billions of bits of information which take a long time to convey over realistic data channels. Thus in applications where real-time image transmission is of interest there is a need to compress the analog video bandwidth. In this paper we report on experiments that use hybrid source encoding techniques to compress video images. We use analog coherent spatial Fourier filtering for preprocessing and real-time linear and adaptive video delta modulators to digitally encode video images. The effects of spatial filter and digital rate parameters on image bandwidth compression is determined. Results of amplitude companding using half-tone techniques are also considered.

Paper Details

Date Published: 8 December 1978
PDF: 6 pages
Proc. SPIE 0154, Real-Time Signal Processing I, (8 December 1978); doi: 10.1117/12.938256
Show Author Affiliations
G. Eichmann, The City College of New York (United States)
R. Mammone, The City College of New York (United States)
R. Stirbl, The City College of New York (United States)
J. Keybl, The City College of New York (United States)
R. Silber, The City College of New York (United States)

Published in SPIE Proceedings Vol. 0154:
Real-Time Signal Processing I
T. F. Tao, Editor(s)

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