公开(公告)号：US20240135119A1

公开(公告)日：2024-04-25

申请号：US18486373

申请日：2023-10-12

Applicant: STMicroelectronics France

Inventor： Florent Sibille ,  Marc Houdebine

IPC: G06K7/10 ,  H04L7/033

CPC classification number: G06K7/10297 ,  H04L7/0331

Abstract: In one embodiment, an object can communicate contactlessly with a reader using active load modulation. The method includes detecting a sensing magnetic field emitted by the reader, initializing a phase-locked loop of the object, detecting a stopping of the sensing magnetic field emitted by the reader before initializing the phase-locked loop of the object is complete, calibrating an oscillator of the phase-locked loop on the basis of an internal clock of the object, detecting a new sensing magnetic field of the reader after calibrating the oscillator, and implementing the phase-locked loop to adjust the phase of the oscillator after detecting a new sensing magnetic field.

公开(公告)号：US20240201383A1

公开(公告)日：2024-06-20

申请号：US18538800

申请日：2023-12-13

Applicant: STMICROELECTRONICS FRANCE ,  STMicroelectronics (Research & Development) Limited

Inventor： Brent Edward Hearn ,  Thierry Lebihen ,  Olivier Pothier

IPC: G01S17/894 ,  G01B11/22 ,  G01S7/481 ,  G01S7/4865

CPC classification number: G01S17/894 ,  G01B11/22 ,  G01S7/4816 ,  G01S7/4865

Abstract: A method includes estimating first distance values associated with a plurality of first pixels, based on light pulses of a first light pulse train having a first period, estimating second distance values associated with a plurality of second pixels, the second distance values being estimated for each second pixel based on a second light pulse train having a second period different from the first period, for each of the first pixels being adjacent to one of the second pixels, validating or invalidating the first distance values, based on a comparison between the estimations of the first distance value and at least one of the second distance values of at least one second adjacent pixel, and storing an indication of the first pixels having been validated and/or invalidated.

公开(公告)号：US20240137254A1

公开(公告)日：2024-04-25

申请号：US18491212

申请日：2023-10-19

Applicant: STMicroelectronics France

Inventor： Florence Giry-Cassan

IPC: H04L27/227 ,  H03B5/12

CPC classification number: H04L27/2273 ,  H03B5/1228 ,  H03B2200/0078

Abstract: Embodiments provide a device that includes a first circuit having a first input to receive a first sine wave signal and a second input to receive a second sine wave signal in quadrature with respect to each other and a current mode logic gate having a first input coupled to a first output of the first circuit and a second input coupled to a second output of the first circuit. The first circuit configured to deliver a first square wave signal and a second square wave signal. The current mode logic gate is configured to deliver a third square wave signal at a first level and a fourth square wave signal at a second level when the first and second square wave signals are simultaneously at their first levels and the first square wave signal is ahead of the second square wave signal.

公开(公告)号：US11915438B2

公开(公告)日：2024-02-27

申请号：US17478643

申请日：2021-09-17

Applicant: STMicroelectronics France

Inventor： Manu Alibay ,  Olivier Pothier ,  Victor Macela ,  Alain Bellon ,  Arnaud Bourge

IPC: G06T7/521 ,  G01S17/08 ,  G06T7/55 ,  G06T7/593 ,  H04N13/207 ,  H04N13/254 ,  H04N13/271 ,  H04N13/00 ,  H04N13/204

CPC classification number: G06T7/521 ,  G01S17/08 ,  G06T7/55 ,  G06T7/593 ,  H04N13/207 ,  H04N13/254 ,  H04N13/271 ,  G06T2207/10012 ,  G06T2207/10021 ,  G06T2207/10028 ,  G06T2207/20212 ,  H04N2013/0081 ,  H04N13/204

Abstract: The method of determination of a depth map of a scene comprises generation of a distance map of the scene obtained by time of flight measurements, acquisition of two images of the scene from two different viewpoints, and stereoscopic processing of the two images taking into account the distance map. The generation of the distance map includes generation of distance histograms acquisition zone by acquisition zone of the scene, and the stereoscopic processing includes, for each region of the depth map corresponding to an acquisition zone, elementary processing taking into account the corresponding histogram.