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Journal of the Society of Motion Picture and Television Engineers ( Volume: 57, Issue: 4, October 1951)
[ACTIVE]

A New Technique for Improving the Sharpness of Television Pictures

Metadata

Publisher
SMPTE
Doc Type
Journal Article
Article Type
research-article
Abstract
In conjunction with the CBS color television system a method has been developed for improving the apparent picture definition, called “crispening.” It uses nonlinear circuitry to decrease the apparent rise time of an isolated step input which is applied to a bandwidth limited system. This gives the color television pictures (with the exception of repetitive patterns representing frequencies beyond system cutoff) the appearance of having been transmitted through a system of greater bandwidth. The basic idea is to add to a waveform with a slow transition a second waveform, representing the difference between the desired waveform and the original waveform. A simple circuit is described which utilizes nonlinear means for reforming the roughly triangular differential of the step signal into a narrower “spike” roughly triangular in shape which is superimposed on the original waveform to obtain a response corresponding to about half the original rise time. Various crispening circuits have been designed for specific applications and will be discussed in more detail.
Publication Date
1951-10-01
DOI
10.5594/J06286
Link
https://doi.org/10.5594/J06286
Author(s)
Peter C. Goldmark, John M. Hollywood
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Peter C. Goldmark and John M. Hollywood; A New Technique for Improving the Sharpness of Television Pictures, Journal of the Society of Motion Picture and Television Engineers ( Volume: 57, Issue: 4, October 1951); SMPTE, 1951. Available at https://doi.org/10.5594/J06286
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Peter C. Goldmark and John M. Hollywood; A New Technique for Improving the Sharpness of Television Pictures, Journal of the Society of Motion Picture and Television Engineers ( Volume: 57, Issue: 4, October 1951); SMPTE, 1951. Available at https://doi.org/10.5594/J06286

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Peter C. Goldmark and John M. Hollywood; A New Technique for Improving the Sharpness of Television Pictures, Journal of the Society of Motion Picture and Television Engineers ( Volume: 57, Issue: 4, October 1951); SMPTE, 1951. Available at https://doi.org/10.5594/J06286
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<span class="citation">Peter C. Goldmark and John M. Hollywood; <cite>A New Technique for Improving the Sharpness of Television Pictures</cite>, Journal of the Society of Motion Picture and Television Engineers ( Volume: 57, Issue: 4, October 1951); SMPTE, 1951. Available at <a href="https://doi.org/10.5594/J06286" target="_blank" rel="noopener">https://doi.org/10.5594/J06286</a></span>

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Peter C. Goldmark and John M. Hollywood; A New Technique for Improving the Sharpness of Television Pictures, Journal of the Society of Motion Picture and Television Engineers ( Volume: 57, Issue: 4, October 1951); SMPTE, 1951
doi: 10.5594/J06286
url: https://doi.org/10.5594/J06286
Snippet:
<li>
Peter C. Goldmark and John M. Hollywood; <cite id="bib-10-5594-j06286">A New Technique for Improving the Sharpness of Television Pictures</cite>, Journal of the Society of Motion Picture and Television Engineers ( Volume: 57, Issue: 4, October 1951); SMPTE, 1951
<span class="doi">10.5594/J06286</span>
</li>