Umgebungsüberwachung mit Niedrigem Stromverbrauch und Aktivierungsauslösung für Mobile Vorrichtungen durch Ultraschallechoanalyse

Details

Veröffentlichungs-Nr.

EP2983063

Aktenzeichen

EP15177712

Anmeldetag

21. Juli 2015

Veröffentlichung

27. April 2016

Rechtsraum

EP

IPC

G06F1/32G01S15/52H04M1/60

Abstract

Systems and methods are disclosed that provide for low-power monitoring of the acoustic echo path around a device to enable device triggering based on activity detection in the environment. An ultrasonic (or more generally an acoustic) reference signal is played through a speaker at well-chosen intervals and its echoes recorded through a microphone. The recorded signal is analyzed to obtain an estimation of the total echo path or echo energy. By monitoring this estimation variation, significant changes in the echo path or echo energy can be identified and used as a trigger. In one embodiment, a hand approaching a phone changes the echo path, activating the phone to a power on mode. In another embodiment, a user using a phone close to the ear changes the echo energy, triggering the phone to select the "ear-fit" mode speaker/microphone.

Anmelder

Firma

NXP B.V.

Land

🇳🇱 Niederlande

Fachgebiete