Variable exponent averaging detector and dynamic range controller
OwnerGeorge Massenburginventor
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Abstract
The VEA Detector and Dynamic Range Controller of the invention more accurately measure constant or non-constant, periodic or aperiodic, signals and the use of such measurements to control the upstream and/or downstream processing of program signals, including without limitation audio, video, and power program signals. The invention uses an antilog module acting within the context of a log domain circuit such that the “averaging” at an integrator is linear, not logarithmic. However, since the detection is within the log domain, the dynamic range of the VEA Detector is exponentially larger.
Claims19
A method for processing a base signal in a dynamic range controller comprising:
- taking a logarithm of said base signal to produce a logarithmed signal;
- subtracting a time-delayed signal provided by an integrator from said logarithmed signal to produce a modified logarithmed signal;
- multiplying said modified logarithmed signal by an exponent to produce an effectively-exponentiated logarithmed signal;
- taking an antilogarithm of a first intermediate signal derived from said effectively-exponentiated logarithmed signal to produce an anti-log signal;
- and
- adding in said integrator a second intermediate signal derived from said anti-log signal to said time-delayed signal to produce an output signal, said time-delayed signal being a time-delayed version of said output signal.
Dependencies are inferred from the claim text.