| Summary: | Until the experiments conducted on Single Sideband speech clipping
in the early 1960's, very little work had been done in the field of conventional
speech processing or clipping since the late 1940's. Although
the SSB experiments were mainly motivated by the unique repeaking
problem associated with clipped SSB signals, they pointed out that
further improvements in intelligibility of clipped speech were still
possible. Perhaps of more importance, these experiments offered
experimental evidence that the problem of intelligibility of clipped
speech was closely related to the intermodulation distortion produced in the clipping process. This paper is a study of clipped speech as
viewed from this point. The relation of the intermodulation distortion
to the intelligibility of clipped speech is developed, and it is shown
that intelligibility can be enhanced by reduction of the intermodulation
products.
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