BigSpeed Voice Chat SDK 3.0
igSpeed Voice Chat SDK is a set of two COM controls (Client and Server) thatnlets you set up a private voice chat network for secure messaging.nThe transfered data are scrambled using on-the-fly 128-bit AES encryption. The security is provided in two different modes: symmetric encryption with shared secret key and asymmetric encryption with 1024-bit public/private keys.nThe server is responsible for keeping information on and authentication of online peers.nAll peers connected to a particular server build a single private community.nFine grained access control is realized by a group of user-oriented permissions.nThey grant access control privileges to system resources and services in a flexible and secure manner.nThe voice stream is highly compressed to deliver the best possible sound over a limited-bandwidth connection. nIn addition, the average bitrate is reduced thanks to the silence compression. In the encoder, a voice activity detector with an adjustable trigger level is used to distinguish between regions with normal speech activity and those with silence or background noise.nSignificant echo suppression is achieved using a robust double talk detector.nCapability to mute recording and mute playback is implemented.nThe incoming and outgoing audio data are available in raw PCM format for visualization in the application.nTwo special events notify about signal overloading (possible distorsions) and transmission delays (network congestions).nTwo different kind of text information can be exchanged between peers: alert and chat messages.nFile transfer capability is implemented for direct file exchange between peers.nBigSpeed Voice Chat SDK utilizes an elegant event-driven paradigm for easy integration into Windows applications.A special attention is paid to provide responsive user interface while avoiding multithreading problems.nSample applications are included in Visual Basic 2005 and Delphi 7.
