What library can I use for working with VoIP streams in C#?

I want to write a VoIP program using C#, in which I want to encode/decode outgoing and incoming streams myself. I will appreciate, if you can tell me, wha开发者_StackOverflow社区t library I can use for it and where can I can find that library.

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You could try NSpeex for a fully managed codec implementation.

NAudio will let you use any ACM codecs on your system, so you can use G.711 a-law and mu-law, ADPCM, GSM 6.10, G.723.1, TrueSpeech or WMA, which come with Windows as standard. It also has managed a-law and mu-law encode/decode.

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3rd party VoIP lib mostly not free.

VoIP stream has many encode/decode standard such as G.729, G.711. i have bought this SIP VoIP SDK from Abto LLC

this library provide most standard VoIP codecs and essential methods to establish connection via SIP protocal.