Interpolation circuit for digital signal processor

Details Interpolation circuit for digital signal processor Interpolation circuit for digital signal processor

1989-03-15

1991-06-25

Shepperd, John W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358163, 358167, 358314, 358336, H04N 514

Patent

active

050272098

ABSTRACT:
An interpolation circuit, in which a digital signal produced by sampling and quantizing an analog information sequentially is encoded so that, in case a certain one of the encoded sample data is erroneous, a correct data in place of the erroneous sample data is prepared as an interpolation data by interpolating other correct sample data. The interpolation circuit includes: a first extrapolation circuit for generating a first extrapolation data by extrapolating two sample data preceding the erroneous sample data to the position of said erroneous sample data, a second extrapolation circuit for generating a second extrapolation data by extrapolating the two sample data succeeding the erroneous sample data to the position of the erroneous sample data, and an averaging circuit for generating the interpolation data by arithmetically averaging the first and second extrapolation data.

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patent: 4789893 (1988-12-01), Weston
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Radio Gijutsusha, "Digital Audio"; Doi et al; pp. 209-210.

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