Journal of the SMPTE ( Volume: 81, Issue: 12, December 1972)
[ACTIVE]
The Subjective Effects of Echoes in 525-Line Monochrome and NTSC Color Television and the Resulting Echo Time Weighting
Metadata
- Publisher
- SMPTE — White Plains, NY, USA
- Doc Type
- Journal Article
- Content Type
- Original Research
- Abbreviated Title
- J SMPTE
- Volume
- 81, No. 12, pp. 907–916
- Abstract
- The subjective effect of an echo in a television picture depends not only upon the amplitude of the echo but also upon its time displacement from the main signal. The relationship between amplitude and time displacement, in the form of an echo time weighting curve, has been used as the basis for designing oscilloscope graticules used in waveform testing methods. A series of subjective tests was performed to evaluate the effects of echoes on 525-line monochrome and NTSC color pictures. Observers used a seven-point comment scale, ranging from “not perceptible” to “extremely objectionable” to rate the echo impairments. The test results show that separate positive and negative echo time weighting curves are indicated for monochrome signals and that a third curve, applicable to both positive and negative echoes, is indicated for color signals.
- Publication Date
- 1972-12-01
- DOI
10.5594/J08180- ISSN
- Print:
0361-4573 - Link
- https://doi.org/10.5594/J08180
- Author(s)
- A. M. LessmanBell Telephone Laboratories, Holmdel, NJ 07733
- Copyright
- © 1972 Society of Motion Picture and Television Engineers, Inc.
Bibliographic Reference(s)
- Influence of Echoes on Television Transmission [Active]
- Subjective Effects of Differential Gain and Differential Phase Distortions in NTSC Color Television Pictures [Active]
- Subjective Effects of Delay Difference between Luminance and Chrominance Information of the NTSC Color Television Signal [Active]
- Measurement of Television Picture Impairments Caused by Linear Distortions [Active]
- System Designing of Color Television Facilities [Active]
- A Single Weighting Characteristic for Random Noise in Monochrome and NTSC Color Television [Active]
- Application of K-Rating to USA NTSC Systems [Active]
- 1. MacDiarmid I. F. , “Waveform distortion in television links,” Proc. Brit. IRE : 201 – 216 , Mar. 1960 . EXTERNAL
- 13. Fletcher R. Powell M. J. D. , “A rapidly convergent descent method for minimization,” The Computer Journal , 6 : No. 2 , 163 – 168 , July 1963 . EXTERNAL
- 2. Ellis A. G. Harnath R. W. Kitchenn R. G. Potter J. B. , “The relaying of television programmes in Australia,” Telecom. J. Australia , 121 – 136 , June 1958 . EXTERNAL
- 5. Muller J. , “The relationship between transient response and picture quality in video transmission systems,” FTZ , 320 – 324 , July 7, 1953 . EXTERNAL
- 6. Ishibashi T. Shiratori E. , “Quantitative noise measurements and the limits of observer reaction,” Tech. Jour. of Japan Broadcasting Corp. , 1 – 6 , Dec. 1956 . EXTERNAL
- 7. Allnatt J. W. Prosser R. D. , “Subjective quality of television pictures impaired by long-delayed echoes,” Proc. IEE , 112 : No. 3 , Mar. 1965 . EXTERNAL
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A. M. Lessman; The Subjective Effects of Echoes in 525-Line Monochrome and NTSC Color Television and the Resulting Echo Time Weighting, Journal of the SMPTE ( Volume: 81, Issue: 12, December 1972); SMPTE, 1972. Available at https://doi.org/10.5594/J08180
Snippet:
A. M. Lessman; The Subjective Effects of Echoes in 525-Line Monochrome and NTSC Color Television and the Resulting Echo Time Weighting, Journal of the SMPTE ( Volume: 81, Issue: 12, December 1972); SMPTE, 1972. Available at https://doi.org/10.5594/J08180
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A. M. Lessman; The Subjective Effects of Echoes in 525-Line Monochrome and NTSC Color Television and the Resulting Echo Time Weighting, Journal of the SMPTE ( Volume: 81, Issue: 12, December 1972); SMPTE, 1972. Available at https://doi.org/10.5594/J08180
Snippet:
<span class="citation">A. M. Lessman; <cite>The Subjective Effects of Echoes in 525-Line Monochrome and NTSC Color Television and the Resulting Echo Time Weighting</cite>, Journal of the SMPTE ( Volume: 81, Issue: 12, December 1972); SMPTE, 1972. Available at <a href="https://doi.org/10.5594/J08180" target="_blank" rel="noopener">https://doi.org/10.5594/J08180</a></span>
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A. M. Lessman; The Subjective Effects of Echoes in 525-Line Monochrome and NTSC Color Television and the Resulting Echo Time Weighting, Journal of the SMPTE ( Volume: 81, Issue: 12, December 1972); SMPTE, 1972
doi: 10.5594/J08180
url: https://doi.org/10.5594/J08180
doi: 10.5594/J08180
url: https://doi.org/10.5594/J08180
Snippet:
<li> A. M. Lessman; <cite id="bib-10-5594-j08180">The Subjective Effects of Echoes in 525-Line Monochrome and NTSC Color Television and the Resulting Echo Time Weighting</cite>, Journal of the SMPTE ( Volume: 81, Issue: 12, December 1972); SMPTE, 1972 <span class="doi">10.5594/J08180</span> </li>
Referenced By
- A Graticule for the Measurement of Short-Time Waveform Distortion in Television Facilities and Subjective Impairments in Television Pictures [Active]
- The use of Echo Time-Weighting to Derive Oscilloscope Graticules for Rating Television Transmission Performance [Active]
- A Time-Weighted Graticule for the 2T Sine-Squared Pulse [Active]
- The Subjective Effect of Random Noise Spectra on 525-Line NTSC Color Television [Active]