Apparatus and method for calculating signal level in decibels
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United States of America Patent
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Apr 24, 1990
Grant Date -
N/A
app pub date -
Apr 1, 1988
filing date -
Apr 1, 1988
priority date (Note) -
Expired
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Abstract
An apparatus and method for calculating signal level in decibels of a digitally encoded signal. A memory has stored in it a first lookup table with values representing the square of signal amplitude. The memory also has stored in it a second lookup table with values representing signal level in decibels. The signal is sampled for a predetermined number of times and each sample is used to address the first lookup table. The read out square of signal amplitude values are summed and the sum is used to address the second table.
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