EP0327268A2
Expired / Lapsed
EP
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Interpolator for and method of interpolating digital samples
Assignee: AT&T Inc
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Filing: 1989-01-27
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Granted: —
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Expires: 2009-01-27
Abstract
Abstract The process of interpolating between two different sampling rates at any point in a sampling interval is obtained using a transversal filter arranged as a continuously variable digital delay line in which the tap coefficients of the delay line are made to be a function of the coefficients of an nth degree polynomial and the delay between the two sampling rates.
Inventors
- 👤 Cecil William Farrow
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 12:14
CPC Classifications
H; H03; H03H; H03H17/00; H03H17/02; H03H17/0248; H03H17/028; G; G06; G06F; G06F17/00; G06F17/10; G06F17/17; H03H17/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
123 words
An interpolator for interpolating digital samples of a signal sampled at a first clock rate into digital samples sampled at a second clock rate, including means for storing a plurality of coefficients (a 0,0 to a 3,2 ) each having a predetermined magnitude, for receiving and storing (201-204) a sequence of the digital samples (x(t)) sampled at the first clock rate, and for combining (200-1 to 200-12) each one of the sequence of digital samples with respective ones of the coefficients, CHARACTERISED BY means (230) for determining the delay between the first and second clock rates, the first-mentioned means serving to generate (205 to 207, 209 to 212) the interpolated digital samples as a function of each of the combinations and the delay.
Claim 2
Dependent Claim
123 words
An interpolator for interpolating digital samples of a signal sampled at a first clock rate into digital samples sampled at a second clock rate, including means for storing a plurality of coefficients (a 0,0 to a 3,2 ) each having a predetermined magnitude, for receiving and storing (201-204) a sequence of the digital samples (x(t)) sampled at the first clock rate, and for combining (200-1 to 200-12) each one of the sequence of digital samples with respective ones of the coefficients, CHARACTERISED BY means (230) for determining the delay between the first and second clock rates, the first-mentioned means serving to generate (205 to 207, 209 to 212) the interpolated digital samples as a function of each of the combinations and the delay.
Claim 3
Dependent Claim
17 words
An interpolator as claimed in claim 1 wherein the coefficients are the coefficients of an nth-degree polynomial.
Claim 4
Independent Claim
94 words
A method of interpolating digital samples of a signal sampled at a first clock rate into digital samples sampled at a second clock rate, including storing a plurality of coefficients each having a predetermined magnitude, storing a sequence of the digital samples sampled at the first clock rate, and combining each one of the sequence of the digital samples with respective ones of the coefficients, CHARACTERISED BY determining the delay between the first and second clock rates, and generating the interpolated digital samples as a function of each of the combinations and the delay.
Claim 5
Independent Claim
94 words
A method of interpolating digital samples of a signal sampled at a first clock rate into digital samples sampled at a second clock rate, including storing a plurality of coefficients each having a predetermined magnitude, storing a sequence of the digital samples sampled at the first clock rate, and combining each one of the sequence of the digital samples with respective ones of the coefficients, CHARACTERISED BY determining the delay between the first and second clock rates, and generating the interpolated digital samples as a function of each of the combinations and the delay.
References Cited (Backward Citations)
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