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LowPassFilter Class |
Low band pass filter.
Inheritance HierarchyNamespace: Accord.Audio.Filters
Assembly: Accord.Audio (in Accord.Audio.dll) Version: 3.8.0
SyntaxThe LowPassFilter type exposes the following members.
Constructors| Name | Description | |
|---|---|---|
 | LowPassFilter(Single) |
Constructs a new Low-Pass Filter using the given alpha.
|
| LowPassFilter(Double, Double) |
Constructs a new Low-Pass Filter using the given cut-off frequency and sample rate.
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Properties| Name | Description | |
|---|---|---|
 | Alpha |
Gets or sets the low-pass alpha value.
|
| FormatTranslations |
Format translations dictionary.
(Inherited from BaseFilter.) |
Methods| Name | Description | |
|---|---|---|
| Apply(Signal) |
Applies the filter to a signal.
(Inherited from BaseFilter.) |
| Apply(Signal) |
Applies the filter to a windowed signal.
(Inherited from BaseFilter.) |
| 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.) |
 | GetAlpha |
Gets the alpha value that can be used to achieve a given
cut-off frequency under a given sampling rate.
|
| 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.) |
| NewSignal |
Creates a new signal from the given signal parameters. This
method can be overridden on child classes to modify how
output signals are created.
(Inherited from BaseFilter.) |
| ProcessFilter |
Processes the filter.
(Overrides BaseFilterProcessFilter(Signal, Signal).) |
| 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.) |
Remarks
The low-pass filter is computed using
for (int t = 0; i < length; t++) y = y[t-1] + Alpha * (x[t] - y[t-1]);
See Also