![]() ![]() The most widely used speech coding standards in VoIP are based on the linear predictive coding (LPC) and modified discrete cosine transform (MDCT) compression methods. Various codecs exist that optimize the media stream based on application requirements and network bandwidth some implementations rely on narrowband and compressed speech, while others support high-fidelity stereo codecs. ![]() They transport media streams using special media delivery protocols that encode audio and video with audio codecs and video codecs. Instead of being transmitted over a circuit-switched network, the digital information is packetized and transmission occurs as IP packets over a packet-switched network. Restart Asterisk /etc/init.The steps and principles involved in originating VoIP telephone calls are similar to traditional digital telephony and involve signaling, channel setup, digitization of the analog voice signals, and encoding. Notice that we are in the modules directory Rename the codec file mv codec_g729-ast14-gcc4-glibc-pentium4.so codec_g729.so Asterisk Version: As you can see there is codecs for Asterisk 1.2, 1.4 and also 1.6.Processor Architecture: Check the kernel type installed on your system (using “uname -a” ).Take care of the following when picking up one of the files, they depend on your hardware/software:.Navigate to the codecs directory: cd /usr/lib/asterisk/modules This tutorial will let you install the G729 Codec on an Asterisk installation in under 5 minutes. ![]()
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