Synthetic Highs — An Experimental TV Bandwidth Reduction System

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Publisher: SMPTE
Doc Type: Journal Article
Article Type: research-article
Abstract: A complete system is described which codes a standard video signal to match a narrower band channel and subsequently decodes the received signal for display on a standard TV monitor. The system transmits the low-frequency, or macro-contrast signal, in analog form. The location and amplitude of the edges are transmitted by a digital code. At the receiver the edge information is used to synthesize the highs content of the video, which is then added to the lows to reconstruct the original video signal. Bandwidth reduction is achieved by exploiting both statistical correlations and psychophysical phenomena. Apparatus for the separation of low frequencies, detection of edges, quantization and binary digital coding of edge amplitude and synthetic reconstruction of highs is described. The digital coder for edge locations has been described elsewhere.1 Picture-tube photographs of the resulting pictures are shown. Factors affecting the degree of bandwidth reduction and the effect of variation of system parameters such as separation frequency and quantization levels are discussed.
Publication Date: 1959-08-01
DOI: 10.5594/J11028
Link: https://doi.org/10.5594/J11028
Author(s): W. F. Schreiber, C. F. Knapp, N. D. Kay

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W. F. Schreiber, C. F. Knapp, and N. D. Kay; Synthetic Highs — An Experimental TV Bandwidth Reduction System, Journal of the SMPTE ( Volume: 68, Issue: 8, August 1959); SMPTE, 1959. Available at https://doi.org/10.5594/J11028

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W. F. Schreiber, C. F. Knapp, and N. D. Kay; Synthetic Highs — An Experimental TV Bandwidth Reduction System, Journal of the SMPTE ( Volume: 68, Issue: 8, August 1959); SMPTE, 1959. Available at https://doi.org/10.5594/J11028

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<span class="citation">W. F. Schreiber, C. F. Knapp, and N. D. Kay; <cite>Synthetic Highs — An Experimental TV Bandwidth Reduction System</cite>, Journal of the SMPTE ( Volume: 68, Issue: 8, August 1959); SMPTE, 1959. Available at <a href="https://doi.org/10.5594/J11028" target="_blank" rel="noopener">https://doi.org/10.5594/J11028</a></span>

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W. F. Schreiber, C. F. Knapp, and N. D. Kay; Synthetic Highs — An Experimental TV Bandwidth Reduction System, Journal of the SMPTE ( Volume: 68, Issue: 8, August 1959); SMPTE, 1959
doi: 10.5594/J11028
url: https://doi.org/10.5594/J11028

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<li>
W. F. Schreiber, C. F. Knapp, and N. D. Kay; <cite id="bib-10-5594-j11028">Synthetic Highs — An Experimental TV Bandwidth Reduction System</cite>, Journal of the SMPTE ( Volume: 68, Issue: 8, August 1959); SMPTE, 1959
<span class="doi">10.5594/J11028</span>
</li>