H - Electricity – 03 – M
Patent
H - Electricity
03
M
354/68
H03M 7/00 (2006.01) H03M 1/08 (2006.01) H03M 1/46 (2006.01) H03M 1/66 (2006.01) H03M 7/50 (2006.01) H03M 1/78 (2006.01)
Patent
CA 2001862
Abstract of the Disclosure Signal conversion apparatus transforms an input signal having a value falling in one of a plurality of ranges into an output signal whose value varies for each different range. All of the output signal values corresponding to the plurality of ranges form an ordered set. The output signal values in this set are related to one another such that the value of any output signal is equal to the immediately preceding output signal value multiplied by a predetermined factor which is a constant for at least a plurality of consecutive output signal values. Use of such a relationship between output signal values advantageously reduces quantization errors in certain telecommunications applications and can be embodied within analog-to-digital, digital-to-analog and digital-to-digital signal conversion apparatus. -15-
American Telephone And Telegraph Company
Kirby Eades Gale Baker
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