Cobra Voice Activity Detection
.NET API

API Reference for the Cobra .NET SDK (NuGet).

Cobra

public class Cobra : IDisposable { }

Class for the Cobra VAD engine.

Cobra.Cobra()

public Cobra(string accessKey)

Constructor method for the Cobra voice activity detection (VAD) engine.

Parameters

• accessKey str : AccessKey obtained from Picovoice Console.

Returns

• Cobra : An instance of Cobra VAD engine.

Throws

• CobraException

Cobra.FrameLength

public Int32 FrameLength { get; private set; }

The number of audio samples per frame that Cobra accepts.

Cobra.SampleRate

public Int32 SampleRate { get; private set; }

The audio sample rate the Cobra accepts.

Cobra.Version

public string Version { get; private set; }

The Cobra library version string.

Cobra.Dispose()

public void Dispose()

Releases resources acquired by Cobra.

Cobra.Process()

public float Process(short[] pcm)

Processes a frame of the incoming audio stream and emits the detection result. The required number of samples-per-frame can be obtained by calling .FrameLength. The incoming audio needs to have a sample rate equal to .SampleRate and be 16-bit linearly-encoded. Cobra operates on single-channel audio.

Parameters

• pcm short[] : A frame of audio samples.

Returns

• float : Probability of voice activity. It is a floating-point number within [0, 1].

Throws

• CobraException

CobraException

public class CobraException : Exception

Error thrown if an error occurs within Cobra VAD engine.

Exceptions

class CobraActivationException(CobraException)
class CobraActivationLimitException(CobraException)
class CobraActivationRefusedException(CobraException)
class CobraActivationThrottledException(CobraException)
class CobraIOException(CobraException)
class CobraInvalidArgumentException(CobraException)
class CobraInvalidStateException(CobraException)
class CobraKeyException(CobraException)
class CobraMemoryException(CobraException)
class CobraRuntimeException(CobraException)
class CobraStopIterationException(CobraException)