Coded data generation or conversion – Analog to or from digital conversion – Increasing converter resolution
Patent
1990-03-12
1991-12-17
Williams, Howard L.
Coded data generation or conversion
Analog to or from digital conversion
Increasing converter resolution
341143, H03M 120
Patent
active
050737775
ABSTRACT:
The invention is structured to add each output signal of a plurality of signal converters connected in parallel, after a common signal is inputted to and quantized in the above plurality of signal converters, having a noise generators which input noise generated utilizing random variables unrelated to each other to respective quantizers within the above plurality of signal converters, so that quantization noise, Q, or the like can be effectively averaged, and a highly reliable signal conversion device, which can ensure an enough dynamic range across a wide frequency region, can be provided.
Also, the invention is structured to add each output signal of a plurality of signal converters connected in parallel, after a common input signal is inputted to and quantized in the above plurality of signal converters, so that a highly reliable signal conversion device similar to the above can be provided.
REFERENCES:
patent: 3999129 (1976-12-01), Kasson
patent: 4187466 (1980-02-01), Kasson et al.
patent: 4761634 (1988-08-01), Yamaguchi et al.
patent: 4926178 (1990-05-01), Mallinson
patent: 4926180 (1990-05-01), Anastassiou
patent: 4947171 (1990-08-01), Pfeifer et al.
Yamasaki, The Application of Large Amplitude Dither to the Quantization of Wide Range Audio Signals, Journal of the Acoustical Society of Japan, vol. 39, No. 7, 1983, pp. 452-462.
Fukuhara Kohji
Yamasaki Yoshio
Hiller William E.
Merrett N. Rhys
Sharp Melvin
Texas Instruments Incorporated
Williams Howard L.
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