Patent US5227787A successfully refreshed from Google Patents.
US5227787A
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US
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Digital data converting system
Assignee: Pioneer Corp
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Filing: 1992-06-30
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Granted: 1993-07-13
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Expires: 2012-06-30
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 Kurashina
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:56
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: 4
Claim 1
Independent Claim
122 words
A digital data converting system 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, comprising: sampling means for sampling the input digital data at a frequency dependent upon the first sampling frequency to obtain first data at plural points before and after an assumed point corresponding to 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 coupled to said sampling means, for interpolating the assumed point from the first data, thereby obtaining data for the sampling point.
Claim 2
Dependent Claim
122 words
A digital data converting system 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, comprising: sampling means for sampling the input digital data at a frequency dependent upon the first sampling frequency to obtain first data at plural points before and after an assumed point corresponding to 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 coupled to said sampling means, for interpolating the assumed point from the first data, thereby obtaining data for the sampling point.
Claim 3
Dependent Claim
28 words
A system according to claim 1, wherein the sampling means is provided for sampling a value obtained by n-th degree polynominal passing sampling points of input digital data.
Claim 4
Dependent Claim
24 words
A system according to claim 2, wherein the sampling means is provided for sampling at a higher sampling frequency than the first sampling frequency.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-07-12 | 1997-01-11 | 1997-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-07-12 | 2001-01-11 | 2001-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-07-12 | 2005-01-11 | 2005-07-13 | $7700.00 | Window Closed / Lapsed |