Title:
SAMPLE RATE CONVERSION
Document Type and Number:
WIPO Patent Application WO1998019396
Kind Code:
A3
Abstract:
A filter device for changing a sample rate of a discrete representation, e.g., to change a size of an image signal (I), includes a plurality of multipliers (Mi), summing circuitry (Ai) coupled to outputs of the multipliers (Mi), and a plurality of delay cells (Di) arranged for repeatedly supplying identical values to corresponding ones of the multipliers (Mi) during a number of times corresponding to an expansion ratio by which the discrete representation (I) is to be expanded, or for, in cooperation with the summing circuitry (Ai, Ai'), accumulating output values from the multipliers (Mi) during a number of times corresponding to a compression ratio by which the discrete representation (I) is to be compressed.
Inventors:
VAN DALFSEN AGE JOCHEM
STESSEN JEROEN HUBERT J C
JANSSEN JOHANNES GERARDUS WILH
STESSEN JEROEN HUBERT J C
JANSSEN JOHANNES GERARDUS WILH
Application Number:
PCT/IB1997/001166
Publication Date:
June 25, 1998
Filing Date:
September 26, 1997
Export Citation:
Assignee:
PHILIPS ELECTRONICS NV (NL)
PHILIPS NORDEN AB (NL)
PHILIPS NORDEN AB (NL)
International Classes:
H03H17/00; H03H17/02; H03H17/06; H04N5/14; H04N5/45; (IPC1-7): H03H17/00
Foreign References:
| GB2305325A | 1997-04-02 | |||
| US5182633A | 1993-01-26 | |||
| US5351087A | 1994-09-27 | |||
| US5023825A | 1991-06-11 |
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