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Journal of the SMPTE ( Volume: 84, Issue: 2, February 1975)
[ACTIVE]

Digital Transmission of Two Television Sound Channels in Horizontal Blanking

Metadata

Publisher
SMPTE — White Plains, NY, USA
Doc Type
Journal Article
Content Type
Original Research
Abbreviated Title
J SMPTE
Volume
84, No. 2, pp. 68–70
Abstract
The conventional way of transmitting television sound information on subcarriers leads to a number of difficulties in satellite communications systems using frequency modulation, because of the limited power available. In particular, when high-quality sound is required, modulation products can only be avoided by going to large bandwidths and high power compared with the actual picture transmission — and this is expensive. A method has been found for transmitting two high-quality (15-kHz bandwidth and better than 60-dB SNR) sound signals with no mutual interference between sound and video signals. No additional RF bandwidth and little additional power is required. The technique involves using a part of the line-blanking interval after shortening the synchronizing pulse. The sound signals are sampled and companded to a given number of bits in a non-return-to-zero code. At the receiving end the pulses are stored, decoded and read out with the original sampling frequency. After passing through a low-pass filter, the signals are available in the original position. Tests have been promising, and a practical application seems possible soon.
Publication Date
1975-02-01
DOI
10.5594/J13405
ISSN
Print: 0361-4573
Link
https://doi.org/10.5594/J13405
Author(s)
Manfred MaegeleFernmeldetechn. Zentralamt der DBP, D-61 Darmstadt, Am Kavalleriesand 3, Germany.
Copyright
© 1975 Society of Motion Picture and Television Engineers, Inc.
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Manfred Maegele; Digital Transmission of Two Television Sound Channels in Horizontal Blanking, Journal of the SMPTE ( Volume: 84, Issue: 2, February 1975); SMPTE, 1975. Available at https://doi.org/10.5594/J13405
Snippet:
Manfred Maegele; Digital Transmission of Two Television Sound Channels in Horizontal Blanking, Journal of the SMPTE ( Volume: 84, Issue: 2, February 1975); SMPTE, 1975. Available at https://doi.org/10.5594/J13405

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Manfred Maegele; Digital Transmission of Two Television Sound Channels in Horizontal Blanking, Journal of the SMPTE ( Volume: 84, Issue: 2, February 1975); SMPTE, 1975. Available at https://doi.org/10.5594/J13405
Snippet:
<span class="citation">Manfred Maegele; <cite>Digital Transmission of Two Television Sound Channels in Horizontal Blanking</cite>, Journal of the SMPTE ( Volume: 84, Issue: 2, February 1975); SMPTE, 1975. Available at <a href="https://doi.org/10.5594/J13405" target="_blank" rel="noopener">https://doi.org/10.5594/J13405</a></span>

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Preview:
Manfred Maegele; Digital Transmission of Two Television Sound Channels in Horizontal Blanking, Journal of the SMPTE ( Volume: 84, Issue: 2, February 1975); SMPTE, 1975
doi: 10.5594/J13405
url: https://doi.org/10.5594/J13405
Snippet:
<li>
Manfred Maegele; <cite id="bib-10-5594-j13405">Digital Transmission of Two Television Sound Channels in Horizontal Blanking</cite>, Journal of the SMPTE ( Volume: 84, Issue: 2, February 1975); SMPTE, 1975
<span class="doi">10.5594/J13405</span>
</li>

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