Coded data generation or conversion – Digital code to digital code converters – Data rate conversion
Reexamination Certificate
2007-01-23
2007-01-23
Nguyen, Linh (Department: 2819)
Coded data generation or conversion
Digital code to digital code converters
Data rate conversion
C341S063000
Reexamination Certificate
active
10805569
ABSTRACT:
Systems and methods for converting a digital input data stream from a first sample rate to a second, fixed sample rate using a combination of hardware and software components. In one embodiment, a system includes a rate estimator configured to estimate the sample rate of an input data stream, a phase selection unit configured to select a phase for interpolation of a set of polyphase filter coefficients based on the estimated sample rate, a coefficient interpolator configured to interpolate the filter coefficients based on the selected phase, and a convolution unit configured to convolve the interpolated filter coefficients with samples of the input data stream to produce samples of a re-sampled output data stream. One or more hardware or software components are shared between multiple channels that can process data streams having independently variable sample rates.
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Park, Sangil, et al.; A Novel Structure for Real-Time Digital Sample-Rate Converters with Finite Precision Error Analysis; Speech Proc'g 2, VLSI, Underwater Sig. Proc'g; Toronto; May 14-17, 1991; Int'l Conf. on Acoustics, Speech & Sig. Proc'g; ICASSP, NY, IEEE, US, vol. 2, Conf. 16, Apr. 14, 1991.
Andersen Jack B.
Chieng Daniel L. W.
Hand Larry E.
Page Joel W.
D2Audio Corporation
Law Offices of Mark L. Berrier
Nguyen Linh
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