Class AmrWbEncoder

Class for encoding linear 16-bit PCM samples into AMR-WB data.

Inheritance

object

AmrWbEncoder

Implements

IAudioEncoder

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

object.ToString()

Namespace: SipLib.Media

Assembly: SipLib.dll

Syntax

public class AmrWbEncoder : IAudioEncoder

Constructors

AmrWbEncoder(int, bool)

Constructor. Initializes the encoder.

Declaration

public AmrWbEncoder(int Mode = 2, bool AllowDtx = false)

Parameters

Type	Name	Description
int	Mode	Specifies the encoder mode which determines the output bit rate. Must be a value between 0 and 8. 0 = 6.60 kbps, 1 = 8.85 kbps, 2 = 12.65 kbps, 3 = 14.25 kbps, 4 = 15.85 kbps, 5 = 18.25 kbps, 6 = 19.85 kbps, 7 = 23.05 kbps, 8 = 23.85. The default is 2 (12.65 kbps).
bool	AllowDtx	Enables or disables Discontinuous Transmit (TX). A value of false disables DTX and a value of true enables it. If DTX is enabled then the encoder will not produce speech packets during periods of silence. The default is false.

Properties

ClockRate

Gets the RTP clock rate in samples/second

Declaration

public int ClockRate { get; }

Property Value

Type	Description
int

SampleRate

Gets the audio sample rate in samples/second

Declaration

public int SampleRate { get; }

Property Value

Type	Description
int

TimeStampIncrement

Amount to increment the RTP packet Time Stamp field by for each new packet.

Declaration

public uint TimeStampIncrement { get; }

Property Value

Type	Description
uint

Methods

CloseEncoder()

Closes the encoder

Declaration

public void CloseEncoder()

Encode(short[])

Encodes linear 16-bit PCM samples into AMR-WB data to send in an RTP packet.

Declaration

public byte[] Encode(short[] InputSamples)

Parameters

Type	Name	Description
short[]	InputSamples	Input linear 16-bit PCM samples. The length must be 320 corresponding to 20 msec. of audio data.

Returns

Type	Description
byte[]	Returns the encoded AMR-WB bytes

Implements

IAudioEncoder