Digital signal processing device with quantizer
AssigneeU.S. Philips Corporation
InventorsHans-Jurgen Butterweck, Theodoor Antonius Carel Maria Claasen, Wolfgang Friedrich Georg Mecklenbrauker, Johannes Bernhard Heinrich Peek
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Abstract
A digital signal processing device of the recursive type, such as a recursive digital filter or a digital oscillator, comprising a storage device for storing at least one first code word related to an output code word, multiplying means for multiplying said first code word by a given weighting factor for generating a second output code word, a controlled quantizer which applies rounding or magnitude truncation upon said second code word in response to a third code word which is related to said first code word.
Claims5
A digital signal processing device comprising:
- supply means for supplying a sequence of code word signals;
- coefficient storage means for storing predetermined weighting coefficients;
- multiplying means for multiplying ones of said code word signals by ones of said weighting coefficients and producing a sequence of output signals;
- and
- first combination means for combining two sequences of signals from said multiplying means, and producing an output signal;
- feedback means for feeding back a quantized representation of said output signals to said supply means, comprising a quantizer having a first and second input, and an output connected to said supply means, and
- second combination means for combining said output signal of said digital multiplier with a sequence of code word signals from said supply means, and producing an output signal for controlling said quantizer.
Dependencies are inferred from the claim text.