Quantization noise reduction in oversampled analog-to-digital si

Details Quantization noise reduction in oversampled analog-to-digital si Quantization noise reduction in oversampled analog-to-digital si

1994-12-29

1996-02-20

Hoff, Marc S.

Coded data generation or conversion

Converter compensation

341143, 36441313, H03M 106

Patent

active

054932971

ABSTRACT:
Quantization noise in oversampled digital data can be reduced by processing including alternate steps of lowpass filtering and so-called code projection, in cases where the set of discrete-time signals corresponding to quantized-signal data is a convex set. Corresponding specific methods are disclosed for simple analog-to-digital conversion, "dithered" analog-to-digital conversion, and first- and second-order single-path .SIGMA..DELTA.-conversion. For example, in the case of simple analog-to-digital conversion, code projection involves replacing sample values by quantization-threshold values in those cases where, after filtering, a sample value lies in a different quantization interval as compared with the corresponding value of quantized-signal data.

REFERENCES:
patent: 4135247 (1979-01-01), Gordon et al.
patent: 4222110 (1980-09-01), Judell
patent: 4562540 (1985-12-01), Devaney
patent: 4754260 (1988-06-01), Nelson et al.
patent: 4984160 (1991-01-01), Saint Felix et al.
"Decimation for Sigma Delta Modulation" by James C. Candy, IEEE Transactions on Communications, vol. COM-34, No. 1, Jan. 1986.
"Improving A/D Conversion by Digital Signal Processing-Novel Solutions for Known Problems and New Problems" by Ulrich Heute, Frequenz 42 (1988) 2/3, pp. 93-101.
"Digitally Corrected Multi-Bit Data Converters" by Cataltepe et al., ISCAS '89, pp. 647-650.
"New Results With Oversampled Converters" by Harris et al., 23ACSSC-Dec./1989, pp. 844-848.
"Image Restoration by the Method of Convex Projections: Part 1-Theory" by Youla et al., IEEE Transations On Medical Imaging, vol. MI-1, No. 2, Oct. 1982, pp. 81-94.

Affiliated with

Also associated with

Rating

Quantization noise reduction in oversampled analog-to-digital si does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Quantization noise reduction in oversampled analog-to-digital si, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quantization noise reduction in oversampled analog-to-digital si will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1358859