Pattern biasing for look-ahead delta sigma modulators

Details Pattern biasing for look-ahead delta sigma modulators Pattern biasing for look-ahead delta sigma modulators

2006-11-21

2006-11-21

Barnie, Rexford (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

C341S144000, C341S155000

Reexamination Certificate

active

07138934

ABSTRACT:
Look-ahead delta sigma modulators of a signal processing system can selectively bias one or more output candidate vectors to alter the probability of selecting a biased output candidate vector(s) for determination of a quantization output value. The probability, within a range of error, of certain output candidate vectors being selected by a quantizer of the look-ahead delta sigma modulator can be determined. The output candidate vectors determine the quantization output values. Thus, altering the probability of selecting a certain output candidate(s) alters the probability of occurrence of a certain quantization output value(s). Detection of the altered probability allows an output signal to be identified. Identifying an output signal allows for many interesting operations including identifying a specific signal processing system source of the output signal and modifying processing of the output signal. Additionally, some quantization output values can be compressed more densely than others.

REFERENCES:
patent: 5548286 (1996-08-01), Craven
patent: 5550544 (1996-08-01), Sakiyama et al.
patent: 5585801 (1996-12-01), Thurston
patent: 5598159 (1997-01-01), Hein
patent: 5708433 (1998-01-01), Craven
patent: 5742246 (1998-04-01), Kuo et al.
patent: 5757300 (1998-05-01), Koilpillai et al.
patent: 5757517 (1998-05-01), Couwenhoven et al.
patent: 5786779 (1998-07-01), Chun et al.
patent: 5977899 (1999-11-01), Adams
patent: 6067515 (2000-05-01), Cong et al.
patent: 6070136 (2000-05-01), Cong et al.
patent: 6112218 (2000-08-01), Gandhi et al.
patent: 6160505 (2000-12-01), Vaishampayan
patent: 6177897 (2001-01-01), Williams, III
patent: 6232899 (2001-05-01), Craven
patent: 6310518 (2001-10-01), Swanson
patent: 6313773 (2001-11-01), Wilson et al.
patent: 6347297 (2002-02-01), Asghar et al.
patent: 6362769 (2002-03-01), Hovin et al.
patent: 6373416 (2002-04-01), McGrath
patent: 6392576 (2002-05-01), Wilson et al.
patent: 6418172 (2002-07-01), Raghavan et al.
patent: 6480129 (2002-11-01), Melanson
patent: 6480528 (2002-11-01), Patel et al.
patent: 6501404 (2002-12-01), Walker
patent: 6590512 (2003-07-01), Roh et al.
patent: 6639531 (2003-10-01), Melanson
patent: 6724332 (2004-04-01), Melanson
patent: 6760573 (2004-07-01), Subrahmanya et al.
patent: 6822594 (2004-11-01), Melanson et al.
patent: 6842128 (2005-01-01), Koh
patent: 6842486 (2005-01-01), Plisch et al.
patent: 6861968 (2005-03-01), Melanson
patent: 6873278 (2005-03-01), Ferguson et al.
patent: 6873280 (2005-03-01), Robinson et al.
patent: 6879275 (2005-04-01), Melanson
patent: 6888484 (2005-05-01), Kiss et al.
patent: 6933871 (2005-08-01), Melanson
patent: 6940434 (2005-09-01), Brooks
patent: 6956514 (2005-10-01), Melanson et al.
patent: 6967606 (2005-11-01), Wiesbauer et al.
patent: 2003/0086366 (2003-05-01), Branlund et al.
patent: 2003/0231729 (2003-12-01), Chien et al.
patent: 2005/0012649 (2005-01-01), Adams et al.
patent: 2005/0052300 (2005-03-01), Ranganathan
patent: 0512687 (1992-11-01), None
patent: 1227595 (2002-07-01), None
patent: 2003-124812 (2003-04-01), None
Angus, James A.S., “Tree Based Lookahead Sigma Delta Modulators,” Audio Engineering Society 114thConvention, Convention Paper 5825, Mar. 22-25, 2003, pp. 1-8.
Harpe, Pieter, et al., “Efficient Trellis-Type Sigma Delta Modulator,” Audio Engineering Society 114thConvention, Convention Paper 5845, Mar. 22-25, 2003, pp. 1-8.
Hawksford, M.O.J., “Parametrically Controlled Noise Shaping in Variable State-Step-Back Pseudo-Trellis SDM,” Audio Engineering Society 115thConvention, Convention Paper, Oct. 10-13, 2003, pp. 1-14.
Kato, Hiroshi, “Trellis Noise-Shaping Converters and 1-bit Digital Audio,” Audio Engineering Society 112thConvention, Convention Paper 5615, May 10-13, 2003, pp. 1-9.
Sony Electronics, Inc. and Philips Electronics N.V., “Super Audio Compact Disc, A Technical Proposal,” 1997, pp. 2-11, unknown month.
Paulos, John J. et al., “Improved Signal-To-Noise Ratio Using Tri-Level Delta-Signa Modulation,” Reprinted from IEEE Proc. ISCAS, May 1987, pp. 245-248.
Knapen, Eric et al., “Lossless Compression of 1-Bit Audio,” J. Audio Eng. Soc., vol. 52, No. 3, Mar. 2004, pp. 190-199.
Zetterberg, L.H. et al., “Adaptive Delta Modulation with Delayed Decision,” IEEE Transactions on Communications, IEEE vol. COM-22, No. 9, Sep. 1974, pp. 1195-1198.
Stonick, J.T. et al., “Look-Ahead Decision-Feedback Σ Δ Modulation,” IEEE International Conference on Acoustics, Speech and Signal Processing, New York, 1994, pp. 541-544, unknown month.
Abeysekera, S. et al., “Design of Multiplier Free FIR Filters Using a LADF Sigma-Delta Modulator,” Circuits and Systems, 2000, Proceedings, ISCAS 2000 Geneva, The 2000 IEEE International Symposium, May 28-31, 2000, vol. 2, May 28, 2000, pp. 65-68.
Abeysekera, S.S. et al., “Performance Evaluation of 3rdOrder Sigma-Delta Modulators via FPGA Implementation,” ASIC/SOC Conference, 2001, Proceedings, 14thAnnual IEEE International Sep. 12-15, 2001, pp. 13-17.
Magrath, A.J. et al., “Performance Enhancement of Sigma-Delta Modulator D-A Converters Using Non-Linear Techniques,” 1996 IEEE Symposium on Circuits and Systems (ISCAS), vol. 2, May 12, 1996, pp. 277-280.
Magrath, A.J. et al., “Non-Linear Deterministic Dithering of Sigma-Delta Modulators,” IEE Colloquium on Oversampling and Sigma Delta Strategies for DSP, 1995, pp. 1-6, unknown month.
Linfors, S., “A Two-Step Quantization Δ Σ-Modulator Architecture with Cascaded Digital Noise Cancellation,” Electronics, Circuits and Systems, 2000, ICECS, The 7thIEEE International Conference, Dec. 17-20, 2000, vol. 1, pp. 125-128.
Harris, F.J. et al., “Implementation Considerations and Limitations for Dynamic Range Enhanced Analog to Digital Converters,” IEEE International Conference on Acoustics, Speech and Signal Processing, May 23, 1989, pp. 1286-1289.
Fang, L. et al., “A Multi-Bit Sigma-Delta Modulator with Interstate Feedback,” Circuits and Systems, 1998, Proceedings of the 1998 IEEE International Symposium, May 31-13 Jun. 3, 1998, vol. 1, pp. 583-586.

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