VoIP Doorbell System with Segmented Camera for Latency Reduction
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Solution Overview
Problem
Modern doorbell systems suffer from latency issues due to the need for user interaction to open an application for video signal transmission and suboptimal viewing angles from traditional mid-height camera placements, which cannot be altered or switched between multiple cameras.
Innovation Solution
An electronic doorbell system that immediately calls a user's device via VoIP after a trigger event, using a separate camera for customizable viewing angles and synchronizing audio and video streams in real-time, eliminating the need for push notifications and allowing for two-way communication without launching an application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If push notification is used to contact user, then user can be notified about doorbell activation, but substantial latency is introduced requiring user to open application to view details
Solution Approach 1:
The system establishes a persistent WebSocket connection in advance before an event occurs, so that when a doorbell activation happens, the data is already transmitted and the user sees it immediately without needing to open an application. The connection is prepared beforehand to enable instant data delivery.
Solution Approach 2:
A WebSocket server acts as an intermediary between the doorbell device and the user's browser. This server maintains a persistent connection and pushes data directly to the user's interface, eliminating the need for the user to actively open or interact with an application while achieving instant notification.
2Adaptability or versatility
If camera is integrated into doorbell at traditional mid-height location, then doorbell structure is simple, but viewing angle is suboptimal and cannot be altered
Solution Approach 1:
The camera is separated from the doorbell device and placed independently at an optimal location for viewing. This segmentation allows the camera to be positioned separately to achieve the best viewing angle while keeping the doorbell itself at its traditional location, resolving the contradiction between optimal viewing and simple structure.
Data Source
AI summary
A system for electronic monitoring includes a doorbell configured to immediately call a user following the occurrence of a trigger event, such as a doorbell button push or detection of motion or sound. The system reduces latency by omitting push notifications to the user, which require the user to open an application program on a device, and instead proceeds to immediately call the user's device following the trigger event. The call can be a telephone call enabled by a wirelessly connected base station or hub making a Voice over Internet Protocol (VoIP) call to the user's mobile device. In one aspect, a video stream captured by a camera positioned separately from the doorbell (for providing an optimum viewing angle of a visitor) can be synchronized by the base station with an audio stream captured by a microphone of the doorbell for communicating a synchronized media stream near instantaneously to the user while the user returns an audio stream to the doorbell during a phone call.