公开(公告)号：US10230411B2

公开(公告)日：2019-03-12

申请号：US15127469

申请日：2014-04-30

Applicant: MOTOROLA SOLUTIONS, INC

Inventor： Jian Han ,  Charles H Carter ,  Jesus F Corretjer ,  Meng-Ge Duan ,  Yi Gao ,  Cheah Heng Tan

IPC: H04B1/10 ,  G10L21/0364 ,  H04M9/08 ,  G10L21/02 ,  G10L25/21 ,  G10L25/78 ,  H04B1/00

Abstract: A method and apparatus for distinguishing voice signals that are played together over the same speaker employs spectral reshaping of one or more of the audio signals. The spectral reshaping shifts modifies the timber of the voice signal while not modifying the pitch of the voice signal. Additional techniques can be used to further distinguish voice signals, such as dynamic gain offset and frequency shifting. After processing one or more signals to spectrally reshape them, they can be played over the same speaker. A user hearing the resulting acoustic signal will be more able to distinguish between the multiple voice signals being played.

公开(公告)号：US09781582B2

公开(公告)日：2017-10-03

申请号：US15326709

申请日：2014-08-29

Applicant: MOTOROLA SOLUTIONS, INC

Inventor： Shu-Shan He ,  Zheng Cao ,  Meng-Ge Duan ,  Huang Su

IPC: H04W72/00 ,  H04W4/20 ,  H04W4/10 ,  H04W24/02

CPC classification number: H04W76/45 ,  H04W4/10 ,  H04W4/203 ,  H04W24/02 ,  H04W76/15

Abstract: Short data is transmitted during a call hang time hold off period in a wireless communication system. During an active call on a voice channel, a radio controller detects deactivation of a push-to-talk (PTT) input at a transmitting mobile station (MS) via an uplink channel portion of the voice channel and identifies a particular MS in the wireless communication system in need to transmit short data. Responsively, the radio controller causes a call hang time hold off request to be transmitted via a downlink channel portion of the voice channel to all MSs in the active call instructing the mobile stations to delay call hang time during a call hang time hold off period. The radio controller then causes a short data transmission request to be sent to the particular MS instructing the particular MS to transmit inbound short data during the call hang time hold off period.