Coded data generation or conversion – Digital code to digital code converters – Data rate conversion
Reexamination Certificate
2007-06-26
2007-06-26
JeanPierre, Peguy (Department: 2819)
Coded data generation or conversion
Digital code to digital code converters
Data rate conversion
C341S143000
Reexamination Certificate
active
11272254
ABSTRACT:
A sample rate converter reduces the sampling rate of a signal by a fractional number U/D, where U represents an up-sampling rate and D represents a down-sampling rate. The converter comprises an input for receiving an input data stream at a first rate and an FIR filtering stage. The FIR filtering stage comprises a set of D polyphase filter branches, each branch including a set of filter coefficients which operate on a sample of the input signal. The converter also comprises a commutative switch which selectively connects a sample of the input data stream to one of the polyphase filter branches, the switch being arranged to skip every U−1 filter branches during a cycle through the filter branches. An output outputs an output data stream at a second data rate which is lower than the first data rate.
REFERENCES:
patent: 4725972 (1988-02-01), Gockler
patent: 4903019 (1990-02-01), Ito
patent: 5489903 (1996-02-01), Wilson et al.
patent: 5512897 (1996-04-01), Wilson et al.
patent: 5625359 (1997-04-01), Wilson et al.
patent: 5907295 (1999-05-01), Lin
patent: 5982305 (1999-11-01), Taylor
patent: 6546407 (2003-04-01), Jiang et al.
patent: 6650258 (2003-11-01), Kelly et al.
patent: 0881764 (1998-12-01), None
Göckler, “Polyphase Realisation of Fractional Sample Rate Converters” Proceedings of the European conference on Circuit Theory and Design, vol. 1, 1999, pp. 105-408, no month.
Analog Devices Inc.
Gauthier & Connors LLP
Jean-Pierre Peguy
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