The new codec allows for properly encoding audio in the 50Hz-4KHz range at a 16KHz sampling rate, as opposed to half that for the older narrowband-only codec. Additionally, the wideband codec actually goes up to 7KHz instead of 4KHz, offering slightly better audio recording capabilities.
There are restrictions for currently available HD voice implementations, though. For CDMA networks, every participant in a call must be connected to a cell site that supports CDMA 1X Advanced and each handset connected to the 1X Advanced cells must have a chipset supporting 1X Advanced and the new codec otherwise it falls back to 1X and the older codec. The only thing left would be for the network operator to enable HD voice on the network.
For wireline networks standard telephony , HD voice is not yet available. All currently available wireline telephony services including VoIP based ones like Vonage use narrowband speech codecs, so there's no capability for HD voice. Consequently, higher-quality speech codecs cannot be used. Currently, there are no networks in the United States that offer HD voice.
Sprint has declared that it will enable it with the upgrade to CDMA 1X Advanced, but it will likely be mostly useless until late Sprint can trumpet the feature all it wants, but HD voice will remain a useless feature that hardly anyone will get to experience until late at the earliest. Post a Comment. This site may earn affiliate commissions from the links on this page.
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