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US 7,027,981 B2Granted
System output control method and apparatus
OwnerKarl M. Bizjakinventor
Life of this patent
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Abstract
Output control system and method includes calculating gain for an input signal, detecting a predetermined condition, and modifying the gain calculation in accordance with one or more kneepoints to provide a varying output signal. A companding ratio is then established in accordance with the kneepoints. System gain is then adjusted, and the companding ratio may be further adjusted by adjusting one of the kneepoints relative to another.
Claims24
A method for controlling system output comprising the steps of
- providing an input signal,
- providing an adjustable system gain for varying the amplitude of the input signal,
- establishing a first kneepoint wherein the first kneepoint represents a first output value corresponding to a first value of the input signal,
- establishing a second kneepoint, wherein the second kneepoint represents a second output value corresponding to a second value of the input signal,
- establishing a companding ratio as a ratio of the absolute value of the difference of second input signal value less the first input signal value, divided by the absolute value of the difference of the second output signal value less the first input signal value,
- adjusting the system gain,
- adjusting the companding ratio in response to the adjusting of the system gain by adjusting one of the kneepoints relative to the other.
4 more elements
A method for controlling system output wherein a plurality of companders operate in parallel comprising the steps of
- providing to each of a plurality of companders an associated input signal,
- providing to a plurality of companders an adjustable system gain for varying the amplitude of the associated input signal,
- establishing for each of a plurality of companders a first kneepoint wherein the first kneepoint represents a first output value corresponding to a first value of the input signal,
- establishing for each of a plurality of companders a second kneepoint, wherein the second kneepoint represents a second output value corresponding to a second value of the input signal,
- establishing for each of a plurality of companders a companding ratio as a ratio of the absolute value of the difference of second input signal value less the first input signal value, divided by the absolute value of the difference of the second output signal value less the first input signal value,
- adjusting for the plurality of companders the system gain,
- adjusting for the plurality of companders the companding ratio in response to the adjusting of the system gain by adjusting one of the kneepoints relative to the other.
4 more elements
Dependencies are inferred from the claim text.