# US 11,113,938 B2 · Audio/video recording and communication devices with multiple cameras > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,113,938 B2 - Document ID: US11113938B2 - Status: Granted - Kind: B2 - Application number: 15/831,854 - Filed: 2017-12-05 - Published: 2018-06-14 - Granted: 2021-09-07 - Earliest claimed: 2016-12-09 - Assignees: Amazon Technologies, Inc. - Applicants: Ring Inc. - Inventors: James Siminoff - Web page: https://patentgrep.com/patent/US11113938B2 ## CPC - G08B 13/19643: {wherein the cameras play different roles, e.g. different resolution, different camera type, different control type} - G06V 10/40: Extraction of image or video features - G06V 10/62: relating to a temporal dimension, e.g. time-based feature extraction; Pattern tracking - G06V 20/52: Surveillance or monitoring of activities, e.g. for recognising suspicious objects (recognising microscopic objects G06V20/69) - G08B 13/19667: {Details realated to data compression, encryption or encoding, e.g. resolution modes for reducing data volume to lower transmission bandwidth or memory requirements} - G08B 13/19669: {Event triggers storage or change of storage policy} - H04N 5/77: between a recording apparatus and a television camera - H04N 7/181: {for receiving images from a plurality of remote sources} - H04N 7/186: {Video door telephones} - H04N 23/51: Housings - H04N 23/651: {for reducing power consumption by affecting camera operations, e.g. sleep mode, hibernation mode or power off of selective parts of the camera} - H04N 23/661: Transmitting camera control signals through networks, e.g. control via the Internet - H04N 23/90: Arrangement of cameras or camera modules, e.g. multiple cameras in TV studios or sports stadiums - G06V 20/44: {Event detection} - G08B: SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS - G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract Audio/video (A/V) recording and communication devices with multiple cameras in accordance with various embodiments of the present disclosure are provided. In one embodiment, an A/V recording and communication device is provided, the device comprising a first camera having a first resolution; a second camera having a second resolution, wherein the second resolution is higher than the first resolution; a communication module; and a processing module operatively connected to the first camera, the second camera, and the communication module, the processing module comprising: a processor; and a camera application, wherein the camera application configures the processor to: maintain the first camera in a powered-on state; maintain the second camera in a low-power or powered-off state; and determine when to power up the second camera based on an output signal from the first camera. ## Claims ### Claim 1 An audio/video recording and communication device (A/V device), comprising: a first camera having a first resolution; a second camera having a second resolution, wherein the second resolution is higher than the first resolution; a communication module; a processor operatively connected to the first camera, the second camera, and the communication module; and a memory storing a camera application comprising instructions that, when executed by the processor, cause the A/V device to: maintain the first camera in a powered-on state; record first video image data using the first camera; maintain the second camera in a low-power or powered-off state; power up the second camera based on an output signal from the first camera; record second video image data using the second camera; prepend at least a portion of the first video image data, captured before the second camera is powered up, to the second video image data to form combined video image data; and transmit the combined video image data to a network device. ### Claim 2 (depends on 1) The A/V device of claim 1, wherein the camera application comprises further instructions, that when executed by the processor, further cause the A/V device to store the first video image data recorded using the first camera in the memory. ### Claim 3 (depends on 1) The A/V device of claim 1, wherein the memory comprises a rolling buffer. ### Claim 4 (depends on 1) The A/V device of claim 1, wherein the camera application comprises further instructions, that when executed by the processor, further cause the A/V device to power up the second camera when the output signal from the first camera indicates that motion has been detected in a field of view of the first camera. ### Claim 5 (depends on 1) The A/V device of claim 1, the network device being a client device. ### Claim 6 (depends on 1) The A/V device of claim 1, the network device being a server. ### Claim 7 (depends on 1) The A/V device of claim 1, wherein the camera application comprises further instructions, that when executed by the processor, further cause the A/V device to generate the output signal in response to detection of a person in a field of view of the first camera. ### Claim 8 (depends on 1) The A/V device of claim 1, wherein a field of view of the first camera is at least partially coincident with a field of view of the second camera. ### Claim 9 (depends on 1) The A/V device of claim 1, wherein the A/V device comprises a doorbell having a front button. ### Claim 10 (depends on 7) The A/V device of claim 7, wherein the camera application comprises further instructions, that when executed by the processor, further cause the A/V device to differentiate motion caused by a person from motion caused by other objects by comparing a set of motion characteristics of a moving object with a dataset. ### Claim 11 (depends on 10) The A/V device of claim 10, wherein the camera application comprises further instructions, that when executed by the processor, further cause the A/V device to detect an object region in the first video image data recorded using the first camera. ### Claim 12 (depends on 11) The A/V device of claim 11, wherein the camera application comprises further instructions, that when executed by the processor, further cause the A/V device to extract at least one feature from the object region. ### Claim 13 (depends on 12) The A/V device of claim 12, wherein the camera application comprises further instructions, that when executed by the processor, further cause the A/V device to compare the at least one feature with trained features in the dataset. ### Claim 14 An audio/video recording and communication device (A/V device), comprising: a first camera having a first resolution; a second camera having a second resolution, wherein the second resolution is higher than the first resolution; a processor operatively connected to the first camera, the second camera, and the communication module; and memory storing computer readable instructions that, when executed by the processor, cause the A/V device to: record first image data using the first camera; detect motion using the first image data; in response to detection of the motion: power up the second camera and record second image data using the second camera; and transition the first camera from a first power state to a second power state, the second power state consuming lower power than the first power state; and after recording the second image data using the second camera: power down the second camera, and transition the first camera from the second power state to the first power state. ### Claim 15 (depends on 14) The A/V device of claim 14, the instructions that detect the motion in the first image data comprising instructions that, when executed by the processor, cause the A/V device to compare successive frames recorded by the first camera. ### Claim 16 (depends on 14) The A/V device of claim 14, the memory storing further computer readable instructions that, when executed by the processor, further cause the A/V device to detect a person in the first image data; wherein the instructions to power up the second camera are only executed when the person is detected. ### Claim 17 (depends on 14) The A/V device of claim 14, a field of view of the first camera being at least partially overlapping with a field of view of the second camera. ### Claim 18 (depends on 14) The A/V device of claim 14, the memory storing further computer readable instructions that, when executed by the processor, further cause the A/V device to prepend the first image data to the second image data to form combined image data, and store the combined image data. ### Claim 19 (depends on 18) The A/V device of claim 18, the memory storing further computer readable instructions that, when executed by the processor, further cause the A/V device to transmit the combined image data to a network device. ### Claim 20 (depends on 19) The A/V device of claim 19, the network device being a server.