The compandor — An aid against static in radio telephony | Nokia Bell Labs Journals & Magazine | IEEE Xplore

The compandor — An aid against static in radio telephony

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Abstract:

One of the important conditions which must be met by any speech transmission system is that it should transmit properly a sufficient range of speech intensities. In long-...Show More

Abstract:

One of the important conditions which must be met by any speech transmission system is that it should transmit properly a sufficient range of speech intensities. In long-wave radio telephony, even after the speech waves are raised to the maximum intensity before transmission, there remain energy variations such that weak syllables and important parts of strong syllables may be submerged under heavy static. The compandor is an automatic device which compresses the range of useful signal energy variations at the transmitting end and expands the range to normal at the receiving end, thus improving the speech-to-noise ratio.
Published in: The Bell System Technical Journal ( Volume: 13, Issue: 3, July 1934)
Page(s): 315 - 332
Date of Publication: July 1934
Print ISSN: 0005-8580