Motion detection for A/V recording and communication devices

• US 10,147,456 B2
• Filed: 11/23/2016
• Issued: 12/04/2018
• Est. Priority Date: 12/04/2015
• Status: Active Grant

• Current Assignee: A9.com Incorporated (Amazon.com, Inc.)
• Original Assignee: Amazon Technologies, Inc. (Amazon.com, Inc.)
• Inventors: Jeong, Changsoo, Tarazi, Karim
• Primary Examiner(s): Hunter, Mishawn N
• Application Number:
  US15/360,704
• Publication Number:
  US 20170160138A1
• Time in Patent Office: 741 Days
• CPC Class Codes: G01J 1/4204 with determination of ambient light solar light G01J2001/4266
• CPC Class Codes: G01J 2005/0077 Imaging
• CPC Class Codes: G01J 5/0025 Living bodies ear thermometers G01J5/0011; detecting, measuring or recording for diagnostic purposes A61B5/00
• CPC Class Codes: G01J 5/025 Interfacing a pyrometer to an external device or network; User interface
• CPC Class Codes: G01J 5/026 Control of working procedures of a pyrometer, other than calibration; Bandwidth calculation; Gain control
• CPC Class Codes: G01K 3/10 in respect of time, e.g. reacting only to a quick change of temperature
• CPC Class Codes: G08B 13/19 using infrared-radiation detection systems G08B13/194 takes precedence
• CPC Class Codes: G08B 13/19656 Network used to communicate with a camera, e.g. WAN, LAN, Internet
• CPC Class Codes: G08B 13/19695 Arrangements wherein non-video detectors start video recording or forwarding but do not generate an alarm themselves
• CPC Class Codes: G08B 29/185 Signal analysis techniques for reducing or preventing false alarms or for enhancing the reliability of the system
• CPC Class Codes: G11B 20/00891 embedded in audio data
• CPC Class Codes: G11B 20/00905 multiple watermarks used in combination
• CPC Class Codes: G11B 20/10527 Audio or video recording; Data buffering arrangements G11B20/12 - G11B20/18 take precedence
• CPC Class Codes: G11B 2020/10537 Audio or video recording
• CPC Class Codes: G11B 31/006 with video camera or receiver
• CPC Class Codes: H04N 23/00 Cameras or camera modules comprising electronic image sensors; Control thereof
• CPC Class Codes: H04N 23/64 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 Class Codes: H04N 5/76 Television signal recording
• CPC Class Codes: H04N 5/77 between a recording apparatus and a television camera
• CPC Class Codes: H04N 5/772 the recording apparatus and the television camera being placed in the same enclosure
• CPC Class Codes: H04N 7/186 : Video door telephones

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.

Claims

1. An audio/video (AN) recording and communication device comprising:

one or more processors;

a plurality of motion sensors; and

memory storing instructions that, when executed by the one or more processors, cause the one or more processors to perform operations comprising;

receiving, at a first time, one or more first signals generated by one or more of the plurality of motion sensors;

determining a first number of the plurality of motion sensors that detected an object at the first time based at least in part on the one or more first signals;

receiving, at a second time, one or more second signals generated by one or more of the plurality of motion sensors;

determining a second number of the plurality of motion sensors that detected the object at the second time based at least in part on the one or more second signals;

comparing the first number of the plurality of motion sensors to the second number of the plurality of the motion sensors;

upon determining that the first number of the plurality of motion sensors is less than the second number of the plurality of motion sensors, generating an alert signal; and

transmitting the alert signal to a client device.

2. The A/V recording and communication device of claim 1, wherein the plurality of motion sensors comprise passive infrared (PIR) sensors.

3. The AN recording and communication device of claim 1, wherein:

the plurality of motion sensors includes a first motion sensor and a second motion sensor;

the one or more first signals includes a third signal from the first motion sensor and a fourth signal from the second motion sensor;

the determining the first number of the plurality of motion sensors that detected the object at the first time comprises;

comparing a magnitude of the third signal to a threshold value;

comparing a magnitude of the fourth signal to the threshold value; and

upon determining that only one of the magnitude of the third signal or the magnitude of the fourth signal is greater than the threshold value, determining that the first number of the plurality of motion sensors is one;

the one or more second signals includes a fifth signal from the first motion sensor and a sixth signal from the second motion sensor; and

the determining the second number of the plurality of motion sensors that detected the object at the second time comprises;

comparing a magnitude of the fifth signal to the threshold value;

comparing a magnitude of the sixth signal to the threshold value; and

upon determining that the magnitude of the fifth signal and the magnitude of the sixth signal are both greater than the threshold value, determining that the second number of the plurality of motion sensors is two.

4. An audio/video (A/V) recording and communication device comprising:

one or more processors;

a plurality of motion sensors; and

memory storing instructions that, when executed by the one or more processors, cause the one or more processors to perform operations comprising;

receiving, at a first time, one or more first signals generated by one or more of the plurality of motion sensors;

determining a first number of the plurality of motion sensors that detected an object at the first time based at least in part on the one or more first signals;

receiving, at a second time, one or more second signals generated by one or more of the plurality of motion sensors;

determining a second number of the plurality of motion sensors that detected the object at the second time based at least in part on the one or more second signals;

comparing the first number of the plurality of motion sensors to the second number of the plurality of the motion sensors; and

upon determining that the first number of the plurality of motion sensors is greater than the second number of the plurality of motion sensors, refraining from generating an alert signal.

5. The A/V recording and communication device of claim 4, wherein:

the plurality of motion sensors includes a first motion sensor and a second motion sensor;

the one or more first signals includes a third signal from the first motion sensor and a fourth signal from the second motion sensor;

the determining the first number of the plurality of motion sensors that detected the object at the first time comprises;

comparing a magnitude of the third signal to a threshold value;

comparing a magnitude of the fourth signal to the threshold value; and

upon determining that the magnitude of the third signal and the magnitude of the fourth signal are both greater than the threshold value, determining that the first number of the plurality of motion sensors is two;

the one or more second signals includes a fifth signal from the first motion sensor and a sixth signal from the second motion sensor; and

the determining the second number of the plurality of motion sensors that detected the object at the second time comprises;

comparing a magnitude of the fifth signal to the threshold value;

comparing a magnitude of the sixth signal to the threshold value; and

upon determining that only one of the magnitude of the third signal and the magnitude of the fourth signal is less than the threshold value, determining that the second number of the plurality of motion sensors is two.

6. The A/V recording and communication device of claim 4, wherein the plurality of motion sensors comprises passive infrared (PIR) sensors.

7. A method for an audio/video (A/V) recording and communication device including one or more processors, a first motion sensor, and a second motion sensor, the method comprising:

receiving, at a first time, a first signal generated by the first motion sensor and a second signal generated by the second motion sensor;

comparing the first signal and the second signal to a threshold value;

receiving, at a second time, a third signal generated by the first motion sensor and a fourth signal generated by the second motion sensor;

comparing the third signal and the fourth signal to the threshold value;

upon determining that only one of the first signal or the second signal exceeds the threshold value, and both the third signal and the fourth signal exceed the threshold value, generating and transmitting a user alert to a client device; and

upon determining that both the first signal and the second signal exceed the threshold value, and only one of the third signal or the fourth signal exceeds the threshold value, refraining from generating a user alert.

8. The A/V recording and communication device of claim 7, wherein the plurality of motion sensors comprises passive infrared (PIR) sensors.