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Journal of the SMPTE ( Volume: 79, Issue: 1, January 1970)
[ACTIVE]

Application of K-Rating to USA NTSC Systems

Metadata

Publisher
SMPTE — White Plains, NY, USA
Doc Type
Journal Article
Content Type
Original Research
Abbreviated Title
J SMPTE
Volume
79, No. 1, pp. 16–21
Abstract
Waveform testing methods are commonly used to determine the performance of video channels.1,2 These testing methods use the distortion introduced by a channel on a specified test signal as a measure of channel performance. Results are presented of a study on using a 2 T pulse, a waveform that has received increased attention in the U.S. for the evaluation of linear distortion, and an oscilloscope graticule to interpret the pulse response in terms of K-rating for NTSC systems. The K-rating method specifies the performance of a channel in terms of a K-rating factor, which is given in per cent and represents a degree of subjective picture impairment equivalent to that occurring in a channel having a single well-displaced echo of K%. The recent study found that the use of a scaled 2 T pulse graticule on NTSC systems may result in K-ratings that are high by a factor of 1.8. A modified 2 T pulse K-rating graticule based on subjective test data using NTSC signals is presented that maintains the one-to-one correspondence between K-rating and picture impairment caused by a single echo.
Publication Date
1970-01-01
DOI
10.5594/J16706
ISSN
Print: 0361-4573
Link
https://doi.org/10.5594/J16706
Author(s)
Robert E. MallonBell Telephone Laboratories, Inc., Holmdel, NJ 07733
Copyright
© 1970 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

  • Influence of Echoes on Television Transmission [Active]
  • Testing of Television Transmission Channels with Vertical Interval Test Signals [Active]
  • Measurement of Television Picture Impairments Caused by Linear Distortions [Active]
  • 1. Johannesen F. G. , “Recent developments and utilization of test signals in the vertical interval,” IEEE Trans. on Broadcasting , BC-13 : 6 – 14 , Jan. 1967 . EXTERNAL
  • 10. Schmid H. , “A graticule to measure the waveform performance of TV facilities,” IEEE Trans. on Broadcasting , 95 – 100 , Feb. 1968 . EXTERNAL
  • 3. Macdiarmid I. F. , “Waveform distortion in television links,” Proc. Brit. IRE , 201 – 216 , Mar. 1960 . EXTERNAL
  • 4. Ellis A. G. Harnath R. W. Kitchenn R. G. Patter J. B. , “The relaying of television programmes in Australia,” Telecom. J. Australia , 121 – 136 , June 1958 . EXTERNAL
  • 5. Lewis N. W. , “Waveform responses of television links,” Proc. Inst. Elec. Eng. (London) , 101 , Pt. III: 258 – 270 , July 1954 . EXTERNAL
  • 6. Wheeler H. A. , “The interpretation of amplitude and phase deviations in terms of paired echoes,” Proc. IRE , 27 : 359 , June 1939 . EXTERNAL
  • 7. Israel J. O. , “The 9A video distortion measuring set,” Bell Lab. Record , 42 : 121 – 123 , April, 1964 . EXTERNAL
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Preview:
Robert E. Mallon; Application of K-Rating to USA NTSC Systems, Journal of the SMPTE ( Volume: 79, Issue: 1, January 1970); SMPTE, 1970. Available at https://doi.org/10.5594/J16706
Snippet:
Robert E. Mallon; Application of K-Rating to USA NTSC Systems, Journal of the SMPTE ( Volume: 79, Issue: 1, January 1970); SMPTE, 1970. Available at https://doi.org/10.5594/J16706

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Robert E. Mallon; Application of K-Rating to USA NTSC Systems, Journal of the SMPTE ( Volume: 79, Issue: 1, January 1970); SMPTE, 1970. Available at https://doi.org/10.5594/J16706
Snippet:
<span class="citation">Robert E. Mallon; <cite>Application of K-Rating to USA NTSC Systems</cite>, Journal of the SMPTE ( Volume: 79, Issue: 1, January 1970); SMPTE, 1970. Available at <a href="https://doi.org/10.5594/J16706" target="_blank" rel="noopener">https://doi.org/10.5594/J16706</a></span>

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Preview:
Robert E. Mallon; Application of K-Rating to USA NTSC Systems, Journal of the SMPTE ( Volume: 79, Issue: 1, January 1970); SMPTE, 1970
doi: 10.5594/J16706
url: https://doi.org/10.5594/J16706
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Robert E. Mallon; <cite id="bib-10-5594-j16706">Application of K-Rating to USA NTSC Systems</cite>, Journal of the SMPTE ( Volume: 79, Issue: 1, January 1970); SMPTE, 1970
<span class="doi">10.5594/J16706</span>
</li>

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