EP0530468A2
Expired / Lapsed
EP
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Digital data converting system
Assignee: Pioneer Corp
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Filing: 1992-07-09
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Granted: —
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Expires: 2012-07-09
Abstract
Abstract A system is provided for converting an input digital data sampled at a first sampling frequency to an output digital data to be sampled at a second sampling frequency. The input digital data is sampled to obtain sampling data with respect to an estimating data corresponding to a data at a sampling point of the output data. The sampling is performed within a period of the least common multiple between a period of sampling of the input digital data and a period of sampling of the output digital data. The estimating data is interpolated from the obtained sampling data.
Inventors
- 👤 Hiroyuki c/o Tokorozawa Koujou Kurashina
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 09:09
CPC Classifications
H; H03; H03H; H03H17/00; H03H17/02; H03H17/06; H03H17/0621; H03H17/0635; H03H17/0685; H04; H04L; H04L7/00; H04L7/0016; H04L7/002; H04L7/0029
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
112 words
A digital data converting system for converting an input digital data sampled at a first sampling frequency (fs in) to an output digital data to be sampled at a second sampling frequency (fs out), characterised by sampling means (10) for sampling the input digital data to obtain sampling data (f(x)) with respect to an estimating data corresponding to a data at a sampling point of the output data within a period of the least common multiple between a period of sampling of the input digital data and a period of sampling of the output digital data; and interpolating means (P(x); 11 - 18) for interpolating the estimating data from the sampling data.
Claim 2
Dependent Claim
112 words
A digital data converting system for converting an input digital data sampled at a first sampling frequency (fs in) to an output digital data to be sampled at a second sampling frequency (fs out), characterised by sampling means (10) for sampling the input digital data to obtain sampling data (f(x)) with respect to an estimating data corresponding to a data at a sampling point of the output data within a period of the least common multiple between a period of sampling of the input digital data and a period of sampling of the output digital data; and interpolating means (P(x); 11 - 18) for interpolating the estimating data from the sampling data.
Claim 3
Dependent Claim
29 words
A system according to claim 1, wherein the sampling means (10) is provided for sampling a value obtained by n-th degree polynominal passing sampling points of input digital data.
Claim 4
Dependent Claim
29 words
A system according to claim 2, wherein the sampling means (10) is provided for sampling at a higher sampling frequency (k.fs in) than the first sampling (fs in) frequency.
Claim 5
Independent Claim
101 words
A method for converting input digital data sampled at a first sampling frequency (fs in) to output digital data sampled at a second sampling frequency (fs out) charactericed by the steps of sampling the input digital data M-times in a sampling period of the least connon multiple between the first and the second frequencies (fs in, fs out) selecting a plurality of data (f (x0...x3) from said sampled input data (f(x)) multiplying said plurality of selected data (f(x0...x3)) by a plurality of coefficients ((-x 3 +3x 2 -2x)/6;...;(x3-x)/6) and adding the results of said multiplication for obtaining said output digital data.
Claim 6
Independent Claim
101 words
A method for converting input digital data sampled at a first sampling frequency (fs in) to output digital data sampled at a second sampling frequency (fs out) charactericed by the steps of sampling the input digital data M-times in a sampling period of the least connon multiple between the first and the second frequencies (fs in, fs out) selecting a plurality of data (f (x0...x3) from said sampled input data (f(x)) multiplying said plurality of selected data (f(x0...x3)) by a plurality of coefficients ((-x 3 +3x 2 -2x)/6;...;(x3-x)/6) and adding the results of said multiplication for obtaining said output digital data.
References Cited (Backward Citations)
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