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Connection.AudioCodecEvrc Field (Android.Telecom ...
https://docs.microsoft.com/en-us/dotnet/api/android.telecom.connection.audiocodecevrc
Enhanced Variable Rate Codec. [Android.Runtime.Register("AUDIO_CODEC_EVRC", ApiSince=30)] [System.Obsolete("This constant will be removed in the future version. Use Android.Telecom.ConnectionAudioCodec enum directly instead of this field.", true)] public const Android.Telecom.ConnectionAudioCodec AudioCodecEvrc = 4;
audio - Decoding EVRC speech codec - Stack Overflow
https://stackoverflow.com/questions/10380367/decoding-evrc-speech-codec
CODEC OVERVIEW. Enhanced Variable Rate Codec B (EVRC-B) was standardized by 3GPP2 in 2006. The EVRC codec operates on each 20ms frame of 16-bit speech signals sampled at 8 KHz and generates compressed bit-streams with bit-rates of 8.3, 7.57, 6.64, 6.18, 5.82, 5.45, 5.08, and 4.0 kbps (source encoding rates) respectively.
EVRC – Enhanced Variable Rate Coder | Adaptive Digital
https://www.adaptivedigital.com/evrc/
The Adaptive Digital Technologies Enhanced Variable Rate Coder (EVRC) is a real-time implementation of the 3GPP2 standardized vocoder. The vocoder, originally developed for cellular telephony, also has other applications in VoIP. EVRC compresses each 20 msec of 8000 Hz, 16-bit sampled speech input into output frames of one of three different sizes: full rate – 171 bits …
EVRC Family of Codecs - Oracle
https://docs.oracle.com/cd/E95618_01/html/sbc_scz810_acliconfiguration/GUID-82B368D5-DC8B-4A5B-B325-B6C3918F5302.htm
The Acme Packet 6300 supports the Enhanced Variable Rate codec (EVRC) for transcoding. Three subtypes of the EVRC codec are supported as media-profiles: EVRC0—header-free EVRC format. This codec is transcodable. EVRC—non-header-free EVRC format. This codec is transcodable. EVRC1—fixed rate EVRC format. This codec is transcodable.
Connection.AudioCodecEvrcB Field (Android.Telecom ...
https://docs.microsoft.com/en-us/dotnet/api/android.telecom.connection.audiocodecevrcb
Enhanced Variable Rate Codec B. [Android.Runtime.Register("AUDIO_CODEC_EVRC_B", ApiSince=30)][System.Obsolete("This constant will be removed in the future version. Use Android.Telecom.ConnectionAudioCodec enum directly instead of this field.", true)]public const Android.Telecom.ConnectionAudioCodec AudioCodecEvrcB = 5; …
Enhanced Variable Rate Codec - Wikipedia
https://en.wikipedia.org/wiki/Enhanced_Variable_Rate_Codec
Enhanced Variable Rate CODEC ( EVRC) is a speech codec used in CDMA networks. It was developed in 1995 to replace the QCELP vocoder which used more bandwidth on the carrier's network, thus EVRC's primary goal was to offer the mobile carriers more capacity on their networks while not increasing the amount of bandwidth or wireless spectrum needed.
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