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Recommended codecs for wideband speech

Has the time for wideband speech (50 Hz - 7 KHz transmitted speech signal bandwidth) finally come for VoIP? If so, which codecs would you recommend? G.722, G.722 2/AMR-WB, VMR-WB or some other proprietary solution?

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Many suppliers are now beginning to offer VoIP products that support wideband speech. The selection of codec will likely depend on the target market.

For example, if a company is making a VoIP telephone set for the enterprise that supports wideband speech, it would likely support G.722. If a company is making a mobile phone for the 3G network they would likely want to support G.722.2 and VMR-WB.

Some manufacturers decide to support proprietary codecs for various reasons. For example, Global IP Sound provides the iPCM codec, which it claims will provide better speech quality than G.722.2.

http://www.globalipsound.com/solutions/solutions_Codecs.php

This was first published in October 2005

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