公开(公告)号：US09998815B2

公开(公告)日：2018-06-12

申请号：US14878215

申请日：2015-10-08

Applicant: MediaTek Inc.

Inventor： Jing-Yi Huang ,  Kuan-Ta Chen ,  Chih-Ping Lin

IPC: H04R1/10 ,  H04R29/00

CPC classification number: H04R1/1041 ,  H04R1/1033 ,  H04R29/001 ,  H04R2460/03 ,  H04R2460/15 ,  H04R2499/11

Abstract: A portable device and a method for entering a power-saving mode are provided. An audio signal is transmitted to an earphone via a cable. At least one electrical characteristic on the cable is sensed to generate at least one sensing signal. The at least one sensing signal is sampled to generate at least one data signal. Whether the earphone is in listening position is determined according to the at least one data signal. When it is determined that the earphone is not in listening position, the portable device enters a power-saving mode.