公开(公告)号：US09846677B2

公开(公告)日：2017-12-19

申请号：US14855351

申请日：2015-09-15

Applicant: QUALCOMM Incorporated

Inventor： Xin Wang ,  Manu Rastogi ,  Venkat Rangan ,  William Howard Constable

IPC: G06F17/14 ,  G06K9/20 ,  G06K9/52

CPC classification number: G06F17/141 ,  G06K9/20 ,  G06K9/522

Abstract: A method for computing a spatial Fourier transform for an event-based system includes receiving an asynchronous event output stream including one or more events from a sensor. The method further includes computing a discrete Fourier transform (DFT) matrix based on dimensions of the sensor. The method also includes computing an output based on the DFT matrix and applying the output to an event processor.

公开(公告)号：US09928213B2

公开(公告)日：2018-03-27

申请号：US14838328

申请日：2015-08-27

Applicant: QUALCOMM Incorporated

Inventor： Xin Wang ,  Young Cheul Yoon ,  Bardia Fallah Behabadi

IPC: G06F17/10 ,  G06F17/14 ,  G06N99/00 ,  H04N19/60 ,  G06N3/04

CPC classification number: G06F17/141 ,  G06F17/14 ,  G06N3/049 ,  G06N99/005 ,  H04N19/60

Abstract: A method of processing asynchronous event-driven input samples of a continuous time signal includes calculating a short-time Fourier transform (STFT) output based on the event-driven input samples. The STFT output may be calculated by expressing an encoding pulse and an STFT window function as a sum of complex weighted causal complex exponentials. The method further includes interpolating output between events.

公开(公告)号：US10147024B2

公开(公告)日：2018-12-04

申请号：US14622736

申请日：2015-02-13

Applicant: QUALCOMM Incorporated

Inventor： Xin Wang ,  William Howard Constable ,  Venkat Rangan ,  Manu Rastogi

IPC: G06K9/00 ,  G06K9/62 ,  G06K9/20 ,  G06K9/60

Abstract: A method of interfacing an event based processing system with a frame based processing system is presented. The method includes converting multiple events into a frame. The events may be generated from an event sensor. The method also includes inputting the frame into the frame based processing system.

公开(公告)号：US09883122B2

公开(公告)日：2018-01-30

申请号：US14853991

申请日：2015-09-14

Applicant: QUALCOMM Incorporated

Inventor： Venkat Rangan ,  William Howard Constable ,  Xin Wang ,  Manu Rastogi

IPC: H04N5/232 ,  H04N5/341 ,  H04N5/374 ,  G06K9/00 ,  G06K9/68 ,  G06N3/063

CPC classification number: H04N5/341 ,  G06F17/10 ,  G06K9/00 ,  G06K9/00771 ,  G06K9/6857 ,  G06N3/063 ,  H04N5/374

Abstract: A method of event-based down sampling includes receiving multiple sensor events corresponding to addresses and time stamps. The method further includes spatially down sampling the addresses based on the time stamps and the addresses. The method may also include updating a pixel value for each of the multiple sensor events based on the down sampling.

公开(公告)号：US11551076B2

公开(公告)日：2023-01-10

申请号：US14835664

申请日：2015-08-25

Applicant: QUALCOMM Incorporated

Inventor： Xin Wang ,  Young Cheul Yoon ,  Manu Rastogi

IPC: G06N3/08 ,  G06N3/04 ,  G06F17/15

Abstract: A method of processing asynchronous event-driven input samples of a continuous time signal, includes calculating a convolutional output directly from the event-driven input samples. The convolutional output is based on an asynchronous pulse modulated (APM) encoding pulse. The method further includes interpolating output between events.