Motion detection for A/V recording and communication devices

Patent metadata

Field	Value
Publication number	US-10325625-B2
Application number	US-201615359300-A
Country	US
Kind code	B2
Filing date	Nov 22, 2016
Priority date	Dec 4, 2015
Publication date	Jun 18, 2019
Grant date	Jun 18, 2019

Abstract

Audio/video (A/V) recording and communication devices according to the present embodiments comprise a processor, a motion sensor, and a camera. In various embodiments, the A/V recording and communication devices are configured to reduce latency and/or to reduce false positive indications of motion.

First claim

What is claimed is:

1. A method for an audio/video (A/V) recording and communication device, the A/V recording and communication device including a processor, a motion sensor, and a camera, the method comprising:
the motion sensor gathering information from within a field of view of the motion sensor and generating an output signal;
at a beginning of a sampling interval, the processor transitioning from a low-power state to an active state;
in response to transitioning to the active state, the processor analyzing the output signal that is generated by the motion sensor during the sampling interval to determine whether motion is indicated within the field of view of the motion sensor;
at an end of the sampling interval, the processor transitioning from the active state to the low-power state; and
when motion is indicated within the field of view of the motion sensor, then powering up the camera of the A/V recording and communication device.

2. The method of claim 1 , wherein sampling intervals occur every 15.625 ms.

3. The method of claim 1 , wherein powering up the camera includes powering up at least one of a camera processor and an image sensor.

4. The method of claim 1 , wherein the motion sensor comprises at least one passive infrared (PIR) sensor.

5. The method of claim 1 , wherein, when motion is indicated within the field of view of the motion sensor, then the processor generates a signal to power up the at least one other component of the A/V recording and communication device, and the at least one other component of the A/V recording and communication device powers up in response to the signal from the processor.

6. The method of claim 1 further comprising when motion is indicated within the field of view of the motion sensor, then powering up a Wi-Fi chip.

7. An audio/video (A/V) recording and communication device, comprising:
a processor;
a motion sensor configured to gather information from within a field of view of the motion sensor and to generate an output signal based on the gathered information;
a camera; and
memory storing instructions that, when executed by the processor, cause the processor to:
at a beginning of a sampling interval, transition from a low-power state to an active state;
during the sampling interval, analyze the output signal that is generated by the motion sensor during the sampling interval to determine whether motion is indicated in the field of view of the motion sensor;
upon determining that motion is not indicated in the field of view of the motion sensor, revert to the low-power state from the active state; and
upon determining that motion is indicated in the field of view of the motion sensor, power up the camera of the A/V recording and communication device.

8. The A/V recording and communication device of claim 7 , wherein sampling intervals occur every 15.625 ms.

9. The A/V recording and communication device of claim 7 , wherein the memory stores further instructions that, when executed by the processor, cause the processor to power up the camera by powering up at least one of a camera processor and an image sensor.

10. The A/V recording and communication device of claim 7 , wherein the motion sensor comprises at least one passive infrared (PIR) sensor.

11. The A/V recording and communication device of claim 7 , wherein the memory stores further instructions that, when executed by the processor, cause the processor to, when motion is indicated within the field of view of the motion sensor, generate a signal to power up the camera, and the camera is further configured to power up in response to the signal from the processor.

12. The A/V recording and communication device of claim 7 , wherein the memory stores further instructions that, when executed by the processor, cause the processor to, upon determining that motion is indicated in the field of view of the motion sensor, power up a Wi-Fi chip.

13. An audio/video (A/V) recording and communication device, comprising:
a processor;
a motion sensor configured to gather information from within a field of view of the motion sensor and to generate an output signal based on the gathered information;
a camera; and
memory storing instructions that, when executed by the processor, cause the processor to:
transition, at a beginning of a sampling interval, from a low-power state to an active state without receiving an interrupt signal from the motion sensor;
sample the output signal from the motion sensor that is generated during the sampling interval;
analyze the sampled output signal to determine whether motion is indicated within the field of view of the motion sensor during the sampling interval;
if no motion is indicated within the field of view of the motion sensor, then revert to the low-power state; and
if motion is indicated within the field of view of the motion sensor, then power up the camera of the A/V recording and communication device.

14. The A/V recording and communication device of claim 13 , wherein the memory stores further instructions that, when executed by the processor, cause the processor to, if the processor reverts to the low-power state, then wait until a next sampling interval and again transition, at a beginning of the next sampling interval, from the low-power state to the active state without receiving an interrupt signal from the motion sensor, and again sample the output signal from the motion sensor that is generated during the next sampling interval.

15. The A/V recording and communication device of claim 13 , wherein the memory stores further instructions that, when executed by the processor, cause the processor to power up the camera by powering up at least one of a camera processor and an image sensor.

16. The A/V recording and communication device of claim 13 , wherein the motion sensor comprises at least one passive infrared (PIR) sensor.

17. The A/V recording and communication device of claim 13 , wherein the memory stores further instructions that, when executed by the processor, cause the processor to, when motion is indicated within the field of view of the motion sensor, then generate a signal to power up the camera of the A/V recording and communication device, and the camera of the A/V recording and communication device is further configured to power up in response to the signal from the processor.

18. The A/V recording and communication device of claim 13 , wherein the memory stores further instructions that, when executed by the processor, cause the processor to, if motion is indicated within the field of view of the motion sensor, power up a Wi-Fi chip.

Assignees

• Ring Inc
• Amazon Tech Inc

Inventors

• Jeong Changsoo
• Tarazi Karim

Classifications

• H04N23/00

  Cameras or camera modules comprising electronic image sensors; Control thereof · CPC title

• H04N23/64

  Computer-aided capture of images, e.g. transfer from script file into camera, check of taken image quality, advice or proposal for image composition or decision on when to take image · CPC title

• G08B29/185

  Signal analysis techniques for reducing or preventing false alarms or for enhancing the reliability of the system · CPC title

• G01J1/4204 Primary

  with determination of ambient light (solar light G01J2001/4266) · CPC title

• G01K3/10

  in respect of time, e.g. reacting only to a quick change of temperature · CPC title