Reduction manner of background noise contrast when hand over regarding the difference of audio encoding

摘要

(57) Abstract As for manner and the device by this invention, portable communication device 110, when it advances to the 2nd communication system 130 which uses the 2nd audio encoder from the 1st communication system 120 which uses the 1st audio encoder, is something in order succession background noise smoothly. As portable communication device 110 advances to 2nd communication system 130, 1st communication system 120 transfers that communication signal in 2nd communication system 130. As the communication signal is transferred, background noise from of 1st communication system 120 is done the sample, with 1st communication system 120 the noise signal which the sample is done, from 2nd communication system 130 with the background noise which the sample is done, is mixed inside the mixer of 2nd communication system 130. When noise change advances, as for noise from of 1st communication system 120 decreasing gradually, although it goes out, noise from of 2nd communication system 130 augmenting gradually, reaches high power level.