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Journal of the SMPTE ( Volume: 76, Issue: 3, March 1967)
[ACTIVE]

A New Random Noise Measuring Instrument for Television Signals

Metadata

Publisher
SMPTE — White Plains, NY, USA
Doc Type
Journal Article
Content Type
Original Research
Abbreviated Title
J SMPTE
Volume
76, No. 3, pp. 180–182
Abstract
This new method for measuring noise in television signals utilizes the time-gated CRT display for the separation of noise power from the video signal. A small rectangular path of a uniform brightness is sampled from the picture signal and its waveform is displayed with a linear time-base sandwiched in between those of the adjustable reference noises. Since the brightness and the quasi-peak-to-peak amplitude of the two displayed waveforms are compared simultaneously, it is quite easy to match them with reasonable accuracy (about 0.5 dB). The instrument can be used to measure conveniently the noise level of the individual heads of the four-head video-tape recorder as a function of the signal level. It has a provision for the weighting functions against the noise frequency and the signal amplitude. The method is applicable to a very small sample area and this has advantages over the existing methods such as those proposed by Weaver and by Edwardson.
Publication Date
1967-03-01
DOI
10.5594/J07049
ISSN
Print: 0361-4573
Link
https://doi.org/10.5594/J07049
Author(s)
Yukiya YamaguchiNHK Science Research Laboratories, 361 Kinuta, Setagaya-ku, Tokyo, Japan
Copyright
© 1967 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

  • 1. Maurice R. D. A. Gilbert M. Newell G. F. , “The visibility of noise in television,” B.B.C. Eng. Monograph No. 3, Oct. 1955 . EXTERNAL
  • 2. Hiwatashi K. Yamaguchi Y. , “Perception of random monochrome video interference,” (in Japanese) , N.H.K. Tech. Jour. , 10 : 260 – 266 , Sept. 1958 . EXTERNAL
  • 3. Hiwatashi K. , “Subjective evaluation of video interferences using reference photographs,” (in Japanese), Jour. Inst. Telev. Engrs. Japan , 17 : 208 – 214 , Apr 1963 . EXTERNAL
  • 4. USSR, CCIR Doc. XI/25, Moscow, 1958 . EXTERNAL
  • 5. von Dietrich Waechter , “A method for measuring random fluctuations in television,” (in German) , Rundfunktechn. Mitteilungen , 2 : 117 – 119 , 1958 . EXTERNAL
  • 6. Weaver L. E. , “The measurement of random noise in the presence of a television signal,” B.B.C. Eng. Monograph No. 24, Mar. 1959 . EXTERNAL
  • 7. Edwardson S. M. , “An instrument for measuring television signal-to-noise ratio,” B.B.C. Eng. Monograph No. 37, June 1961 . EXTERNAL
  • 8. Holder J. E. , “An instrument for the measurement of random noise in the presence of a television test signal,” IEE Conf. Report Series No. 5, Telev. Eng., 20 – 26 , June 1963 . EXTERNAL
  • 9. Japan, CCIR Doc. 41 E, Los Angeles, 1959 . EXTERNAL
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Yukiya Yamaguchi; A New Random Noise Measuring Instrument for Television Signals, Journal of the SMPTE ( Volume: 76, Issue: 3, March 1967); SMPTE, 1967. Available at https://doi.org/10.5594/J07049
Snippet:
Yukiya Yamaguchi; A New Random Noise Measuring Instrument for Television Signals, Journal of the SMPTE ( Volume: 76, Issue: 3, March 1967); SMPTE, 1967. Available at https://doi.org/10.5594/J07049

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Yukiya Yamaguchi; A New Random Noise Measuring Instrument for Television Signals, Journal of the SMPTE ( Volume: 76, Issue: 3, March 1967); SMPTE, 1967. Available at https://doi.org/10.5594/J07049
Snippet:
<span class="citation">Yukiya Yamaguchi; <cite>A New Random Noise Measuring Instrument for Television Signals</cite>, Journal of the SMPTE ( Volume: 76, Issue: 3, March 1967); SMPTE, 1967. Available at <a href="https://doi.org/10.5594/J07049" target="_blank" rel="noopener">https://doi.org/10.5594/J07049</a></span>

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Preview:
Yukiya Yamaguchi; A New Random Noise Measuring Instrument for Television Signals, Journal of the SMPTE ( Volume: 76, Issue: 3, March 1967); SMPTE, 1967
doi: 10.5594/J07049
url: https://doi.org/10.5594/J07049
Snippet:
<li>
Yukiya Yamaguchi; <cite id="bib-10-5594-j07049">A New Random Noise Measuring Instrument for Television Signals</cite>, Journal of the SMPTE ( Volume: 76, Issue: 3, March 1967); SMPTE, 1967
<span class="doi">10.5594/J07049</span>
</li>

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