Coded data generation or conversion – Analog to or from digital conversion – Increasing converter resolution
Patent
1994-09-08
1997-05-06
DeBoer, Todd E.
Coded data generation or conversion
Analog to or from digital conversion
Increasing converter resolution
341 95, H03M 120
Patent
active
056275358
ABSTRACT:
A quantization apparatus for quantizing and word length limiting digitized stereo input signals including a stereo dither signal generating unit for generating stereo dither signals synthesized from at least two distinct dither signals not correlated to each other at an arbitrary ratio, a first addition unit for adding one of the stereo dither signals to one of the digital stereo input signals, a second addition unit for adding the other of the stereo dither signals to the other of the digital stereo input signals, a first quantization unit for quantizing and word length limiting an output signal of the first addition unit, and a second quantization unit for quantizing and word length limiting an output signal of the second addition unit. With the present quantization device, the stereo input signals may be quantized while cross-correlation between the left and right channel stereo input signals is maintained.
REFERENCES:
patent: 4638506 (1987-01-01), Han
patent: 4845498 (1989-07-01), Kubo et al.
patent: 5040220 (1991-08-01), Iwamatsu
patent: 5073777 (1991-12-01), Fukuhara et al.
patent: 5073778 (1991-12-01), Ueki et al.
Ichimura Gen
Inomata Yuichi
Noguchi Masayoshi
Deboer Todd E.
Sony Corporation
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