Signal interpolators

Details Signal interpolators Signal interpolators

1986-10-21

1987-10-27

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358138, 358160, 382 47, H04N 701

Patent

active

047033533

ABSTRACT:
A signal interpolator for time base expanding a portion of an input sample signal of given sample rate by deriving, from the input sample values, interpolated output sample values at that sample rate, the signal interpolator comprising an address generator comprising an address counter for supplying a sequence of initial sample position addresses at that sample rate and corresponding to input sample values in the input sample signal, and a device for deriving, from the initial addresses, a modified sequence of sample position addresses at that sample rate, the modified sequence containing address repetitions corresponding to the required degree of expansion, and also for deriving residual signals corresponding to subdivisions of the intervals between successive different addresses in the modified sequence, and an interpolator for deriving each interpolated output sample value in dependence on the value of the residual signal and of a respective corresponding group of the input sample values.

REFERENCES:
patent: 4603348 (1986-07-01), Yamada
patent: 4603350 (1986-07-01), Arbeiter
patent: 4636857 (1987-01-01), Achiha
patent: 4642689 (1987-02-01), Demmer

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