Electrical computers: arithmetic processing and calculating – Electrical digital calculating computer – Particular function performed
Reexamination Certificate
2011-03-15
2011-03-15
Bullock, Jr., Lewis A (Department: 2193)
Electrical computers: arithmetic processing and calculating
Electrical digital calculating computer
Particular function performed
C708S290000, C708S313000, C708S315000
Reexamination Certificate
active
07908306
ABSTRACT:
Systems and methods for converting a data stream from a first sample rate to a second sample rate using a sample rate converter that employs selectable filters. In one embodiment, the filters are implemented by providing multiple sets of filter coefficients in a memory, selecting one of the sets of filter coefficients and performing coefficient interpolation to produce filter coefficients that are convolved with the input data stream to produce a re-sampled output data stream. The input signal can be an audio signal that is convolved with interpolated polyphase filter coefficients in the sample rate converter of a digital PWM audio amplifier. The set of filter coefficients can be selected by a value stored in a filter selection register that is modifiable by a DSP or by user input. The sets of filter coefficients can be stored in a single memory and interpolated according to a cubic spline interpolation algorithm.
REFERENCES:
patent: 4641326 (1987-02-01), Tomisawa
patent: 4727505 (1988-02-01), Konishi et al.
patent: 4841828 (1989-06-01), Suzuki
patent: 5023825 (1991-06-01), Luthra et al.
patent: 5285263 (1994-02-01), Fujita
patent: 5319584 (1994-06-01), Ooyabu
patent: 5367162 (1994-11-01), Holland et al.
patent: 5471411 (1995-11-01), Adams et al.
patent: 5475628 (1995-12-01), Adams et al.
patent: 5481568 (1996-01-01), Yada
patent: 5621805 (1997-04-01), Loh et al.
patent: 5648922 (1997-07-01), Han
patent: 5907295 (1999-05-01), Lin
patent: 5928313 (1999-07-01), Thompson
patent: 5986589 (1999-11-01), Rosefield et al.
patent: 6044113 (2000-03-01), Oltean
patent: 6057789 (2000-05-01), Lin
patent: 6061410 (2000-05-01), Linz
patent: 6124895 (2000-09-01), Fielder
patent: 6134268 (2000-10-01), McCoy
patent: 6324235 (2001-11-01), Savell et al.
patent: 6393198 (2002-05-01), LaMacchia
patent: 6411333 (2002-06-01), Auld et al.
patent: 6531970 (2003-03-01), McLaughlin et al.
patent: 6593807 (2003-07-01), Groves et al.
patent: 6665338 (2003-12-01), Midya et al.
patent: 6765931 (2004-07-01), Rabenko et al.
patent: 6819732 (2004-11-01), Savell
patent: 7023868 (2006-04-01), Rabenko et al.
patent: 7167112 (2007-01-01), Andersen et al.
patent: 7236109 (2007-06-01), Duewer et al.
patent: 7262716 (2007-08-01), Yu et al.
patent: 7474722 (2009-01-01), Chieng et al.
patent: 2002/0046227 (2002-04-01), Goszewski et al.
patent: 2002/0105448 (2002-08-01), Friedhof
patent: 2002/0190880 (2002-12-01), McLaughlin et al.
patent: 2003/0037297 (2003-02-01), Araki
patent: 2003/0074381 (2003-04-01), Awad et al.
patent: 2003/0179116 (2003-09-01), Oki
patent: 2 267 193 (1993-11-01), None
patent: 2002-314429 (2002-10-01), None
patent: 2008-018518 (2008-01-01), None
Ketola et al., “Synchronization of Fractional Interval Counter in Non-Integer Ratio Sample Rate Converters,” Proceedings of the 2003 International Symposium on Circuits and Systems, 2003 ISCAS '03, vol. 2, May 25-28, 2003, pp. 89-92.
Park et al., “A Novel Structure for Real-Time Digital Sample-Rate Converters with Finite Precision Error Analysis,” Speech Processing 2. VLSI, Underwater Signal Processing, Toronto, May 14-17, 1991, International Conference on Acoustics, Speech and Signal Processing, ICASSP, NY, IEEE, US, vol. 2, Conf. 16, Apr. 14, 1991, 4 pages.
Andersen Jack B.
Chieng Daniel L. W.
Hand Larry E.
Bullock, Jr. Lewis A
Fliesler & Meyer LLP
Yaary Michael
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