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一.概述
WBS(wide band speech)通俗来讲就是蓝牙宽带通话,通话数据frequency 16K,采用msbc编解码(chip中实现)和NBS(narrow band speech)相对,NBS通俗来讲是窄带通话,通话数据frequency 8K,采用CSVD编解码(chip中实现)
NBS是默认
二.实现
要实现WBS,总体来说比较复杂要分两个阶段进行:
1.profile层(HFP AT COMMAND)
2.control bluetooth chip(如 CSR 通过 BCCMD)
三.profile层实现:
步骤:1.First, in the initialization procedure, the HF shall send the AT+BRSF=<HF supported features>
command to the AG to both notify the AG of the supported features in the HF, as well as to
retrieve the supported features in the AG