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half rate (HR)

Half Rate (HR) is one of four sub-standards for the transmission of the voice signal in mobile communications with which voice is encoded and decoded in GSM networks and UMTS networks. Half-rate transmission requires only half the bandwidth for data transmission, which means that twice as many channels can be transmitted over the same bandwidth.

In addition to the HR method, there is the FR method, Full Rate, the EFR method, Enhanced Full Rate, and Adaptive Multirate ( AMR).


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