May 11, 2014. GL Communications Inc. has announced the release of its enhanced VoIP and T1 E1 platform applications with G.722 Wideband Audio Codec support. GL Communications products support G.722 with a variety of signaling and audio processing applications in both VoIP and TDM platforms. Using these applications, one can easily emulate, analyze, and troubleshoot audio signaling and quality over both VoIP and TDM.
Vijay Kulkarni, CEO of the company, said, “Despite revolutionary advances in telecommunications technology, audio quality has remained virtually unchanged for nearly 50 years! This may change with the penetration of VoIP in wired networks and Voice over LTE (VoLTE) for wireless networks. G.722 is a wideband codec with more natural sound, better clarity, and intelligibility. And very importantly, it’s license free. Most all VoIP phones have it and use it within an enterprise and VPNs. Radio stations also use it for their audio transmissions prior to over the air transmission, since PSTN quality is just not good enough.” The better quality, he said, is due to its better sampling spectral characteristics.
He added, “G.722 wideband audio codec has been around for some time (since ITU standardization in 1988).” He noted that compared to G.711, it has the following superior characteristics:
- The G.722 codec normally operates at 64 kbps (similar to G.711, A-law and u-law), although it can also operate at 56 kbps, or 48 kbps.
- It is license free.
- It has better audio frequency response due to 16-kHz sampling and 14-bit resolution, and therefore G.722 codec provides better speech quality than G.711 codec.
- It is used to transmit higher quality audio over 64-kb/s ISDN circuits—sometimes called 'program audio' for radio stations.
- The codec is widely used in VoIP networks, wherein VoIP phones can easily (free license and technically simple) implement G.722, instead of G.711 with the same RTP overhead.
Kulkarni further explained, “GL Communications products support G.722 with a variety of signaling and audio-processing applications in both VoIP and TDM. Using these applications, one can easily emulate, analyze, and troubleshoot audio signaling and quality over both VoIP and TDM.”
Applications supporting G.722 over IP include PacketScan (a versatile packet analyzer for VoIP that supports many signaling protocols like H.323, SIP, RTP, Skinny, and Megaco), PacketGen (a SIP protocol emulator), VQuad SIP (a voice- and data-quality test tool), and all the company's MAPS Emulation products.