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EnvelopeFilter Class |
Hilbert transform based envelope detector.
Inheritance HierarchyNamespace: Accord.Audio.ComplexFilters
Assembly: Accord.Audio (in Accord.Audio.dll) Version: 3.8.0
SyntaxThe EnvelopeFilter type exposes the following members.
Constructors| Name | Description | |
|---|---|---|
 | EnvelopeFilter |
Constructs a new Envelope filter.
|
Methods| Name | Description | |
|---|---|---|
| Apply(ComplexSignal) |
Applies the filter to a signal.
(Inherited from BaseComplexFilter.) |
| Apply(ComplexSignal) |
Applies the filter to a windowed signal.
(Inherited from BaseComplexFilter.) |
| Equals | Determines whether the specified object is equal to the current object. (Inherited from Object.) |
 | Finalize | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.) |
| GetHashCode | Serves as the default hash function. (Inherited from Object.) |
| GetType | Gets the Type of the current instance. (Inherited from Object.) |
| MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
| ProcessFilter |
Processes the filter.
(Overrides BaseComplexFilterProcessFilter(ComplexSignal, ComplexSignal).) |
| ToString | Returns a string that represents the current object. (Inherited from Object.) |
Extension Methods| Name | Description | |
|---|---|---|
 | HasMethod |
Checks whether an object implements a method with the given name.
(Defined by ExtensionMethods.) |
| IsEqual |
Compares two objects for equality, performing an elementwise
comparison if the elements are vectors or matrices.
(Defined by Matrix.) |
| To(Type) | Overloaded.
Converts an object into another type, irrespective of whether
the conversion can be done at compile time or not. This can be
used to convert generic types to numeric types during runtime.
(Defined by ExtensionMethods.) |
| ToT | Overloaded.
Converts an object into another type, irrespective of whether
the conversion can be done at compile time or not. This can be
used to convert generic types to numeric types during runtime.
(Defined by ExtensionMethods.) |
RemarksThis method works by creating the analytic signal of the input by using a Hilbert transform. An analytic signal is a complex signal, where the real part is the original signal and the imaginary part is the Hilbert transform of the original signal.
The complex envelope of a signal can be found by taking the absolute (magnitude) value of the analytic signal.
References: http://en.wikipedia.org/wiki/Hilbert_transform
See Also