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    <title>DEV Community: OHZ Security - 24/7 Virtual Doorman Remote Guard Surveillance</title>
    <description>The latest articles on DEV Community by OHZ Security - 24/7 Virtual Doorman Remote Guard Surveillance (@ohzsecurity).</description>
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    <item>
      <title>From Camera Alert to Human Response How Apartment Security Monitoring Works</title>
      <dc:creator>OHZ Security - 24/7 Virtual Doorman Remote Guard Surveillance</dc:creator>
      <pubDate>Tue, 18 Aug 2026 11:04:04 +0000</pubDate>
      <link>https://dev.to/ohzsecurity/from-camera-alert-to-human-response-how-apartment-security-monitoring-works-22oi</link>
      <guid>https://dev.to/ohzsecurity/from-camera-alert-to-human-response-how-apartment-security-monitoring-works-22oi</guid>
      <description>&lt;p&gt;Nowadays, apartment security systems have become more sophisticated than just recording videos and reviewing them after something has happened.&lt;/p&gt;

&lt;p&gt;Current security surveillance technology can integrate cameras, video analytics using artificial intelligence, events, verification, and response into one process flow.&lt;/p&gt;

&lt;p&gt;The key issue here is not only recognizing activity but also figuring out if this activity is important and providing the proper information to the proper people.&lt;/p&gt;

&lt;p&gt;The process flow itself includes:&lt;/p&gt;

&lt;p&gt;DETECT → VERIFY → DETER → RESPOND&lt;/p&gt;

&lt;h2&gt;
  
  
  1. Detect Relevant Activity
&lt;/h2&gt;

&lt;p&gt;A condominium complex could have cameras for entrances, parking lots, garages, gates, walkways, package rooms, and common areas.&lt;/p&gt;

&lt;p&gt;Cameras continuously produce videos, but most of those videos do not constitute a security incident.&lt;/p&gt;

&lt;p&gt;AI-based video analytics will assist in identifying the possibly related activity such as:&lt;/p&gt;

&lt;ul&gt;
&lt;li&gt;Person detection&lt;/li&gt;
&lt;li&gt;Vehicle detection&lt;/li&gt;
&lt;li&gt;Restricted-area activity&lt;/li&gt;
&lt;li&gt;Line crossing&lt;/li&gt;
&lt;li&gt;After-hours movement&lt;/li&gt;
&lt;li&gt;Unusual activity&lt;/li&gt;
&lt;/ul&gt;

&lt;p&gt;For example:&lt;br&gt;
&lt;/p&gt;

&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight python"&gt;&lt;code&gt;&lt;span class="n"&gt;event&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
    &lt;span class="sh"&gt;"&lt;/span&gt;&lt;span class="s"&gt;camera&lt;/span&gt;&lt;span class="sh"&gt;"&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="sh"&gt;"&lt;/span&gt;&lt;span class="s"&gt;parking_04&lt;/span&gt;&lt;span class="sh"&gt;"&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt;
    &lt;span class="sh"&gt;"&lt;/span&gt;&lt;span class="s"&gt;object&lt;/span&gt;&lt;span class="sh"&gt;"&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="sh"&gt;"&lt;/span&gt;&lt;span class="s"&gt;person&lt;/span&gt;&lt;span class="sh"&gt;"&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt;
    &lt;span class="sh"&gt;"&lt;/span&gt;&lt;span class="s"&gt;zone&lt;/span&gt;&lt;span class="sh"&gt;"&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="sh"&gt;"&lt;/span&gt;&lt;span class="s"&gt;restricted&lt;/span&gt;&lt;span class="sh"&gt;"&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt;
    &lt;span class="sh"&gt;"&lt;/span&gt;&lt;span class="s"&gt;confidence&lt;/span&gt;&lt;span class="sh"&gt;"&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt; &lt;span class="mf"&gt;0.93&lt;/span&gt;
&lt;span class="p"&gt;}&lt;/span&gt;

&lt;span class="k"&gt;if&lt;/span&gt; &lt;span class="n"&gt;event&lt;/span&gt;&lt;span class="p"&gt;[&lt;/span&gt;&lt;span class="sh"&gt;"&lt;/span&gt;&lt;span class="s"&gt;object&lt;/span&gt;&lt;span class="sh"&gt;"&lt;/span&gt;&lt;span class="p"&gt;]&lt;/span&gt; &lt;span class="o"&gt;==&lt;/span&gt; &lt;span class="sh"&gt;"&lt;/span&gt;&lt;span class="s"&gt;person&lt;/span&gt;&lt;span class="sh"&gt;"&lt;/span&gt; &lt;span class="ow"&gt;and&lt;/span&gt; &lt;span class="n"&gt;event&lt;/span&gt;&lt;span class="p"&gt;[&lt;/span&gt;&lt;span class="sh"&gt;"&lt;/span&gt;&lt;span class="s"&gt;zone&lt;/span&gt;&lt;span class="sh"&gt;"&lt;/span&gt;&lt;span class="p"&gt;]&lt;/span&gt; &lt;span class="o"&gt;==&lt;/span&gt; &lt;span class="sh"&gt;"&lt;/span&gt;&lt;span class="s"&gt;restricted&lt;/span&gt;&lt;span class="sh"&gt;"&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt;
    &lt;span class="nf"&gt;print&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="sh"&gt;"&lt;/span&gt;&lt;span class="s"&gt;Potential security event&lt;/span&gt;&lt;span class="sh"&gt;"&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;



&lt;p&gt;It is not to replace the video feed itself.&lt;/p&gt;

&lt;p&gt;It is rather to determine which areas of the video need to be watched.&lt;/p&gt;

&lt;p&gt;&lt;a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Farticles%2Fsm1v7qmejaeivx2e40bi.png" class="article-body-image-wrapper"&gt;&lt;img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Farticles%2Fsm1v7qmejaeivx2e40bi.png" alt=" " width="476" height="210"&gt;&lt;/a&gt;&lt;/p&gt;

&lt;h2&gt;
  
  
  2. Verify the Event
&lt;/h2&gt;

&lt;p&gt;Detection alone is not enough to prove a security breach. Someone at an apartment door could be a tenant, a guest, a driver, a repairman, or a trespasser.&lt;/p&gt;

&lt;p&gt;Human validation may provide some context missing from the detection process.&lt;/p&gt;

&lt;p&gt;A practical workflow is:&lt;/p&gt;

&lt;p&gt;AI Detection&lt;br&gt;
     ↓&lt;br&gt;
Event Rules&lt;br&gt;
     ↓&lt;br&gt;
Operator Review&lt;br&gt;
     ↓&lt;br&gt;
Live Video Verification&lt;/p&gt;

&lt;p&gt;The operator can watch the live video along with the environment around to determine whether the incident needs any response or not.&lt;/p&gt;

&lt;p&gt;For instance, a sample event processing rule is:&lt;br&gt;
&lt;/p&gt;

&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight python"&gt;&lt;code&gt;&lt;span class="k"&gt;def&lt;/span&gt; &lt;span class="nf"&gt;evaluate_event&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="n"&gt;event&lt;/span&gt;&lt;span class="p"&gt;):&lt;/span&gt;
    &lt;span class="nf"&gt;if &lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;
        &lt;span class="n"&gt;event&lt;/span&gt;&lt;span class="p"&gt;[&lt;/span&gt;&lt;span class="sh"&gt;"&lt;/span&gt;&lt;span class="s"&gt;object&lt;/span&gt;&lt;span class="sh"&gt;"&lt;/span&gt;&lt;span class="p"&gt;]&lt;/span&gt; &lt;span class="o"&gt;==&lt;/span&gt; &lt;span class="sh"&gt;"&lt;/span&gt;&lt;span class="s"&gt;person&lt;/span&gt;&lt;span class="sh"&gt;"&lt;/span&gt;
        &lt;span class="ow"&gt;and&lt;/span&gt; &lt;span class="n"&gt;event&lt;/span&gt;&lt;span class="p"&gt;[&lt;/span&gt;&lt;span class="sh"&gt;"&lt;/span&gt;&lt;span class="s"&gt;zone&lt;/span&gt;&lt;span class="sh"&gt;"&lt;/span&gt;&lt;span class="p"&gt;]&lt;/span&gt; &lt;span class="o"&gt;==&lt;/span&gt; &lt;span class="sh"&gt;"&lt;/span&gt;&lt;span class="s"&gt;restricted&lt;/span&gt;&lt;span class="sh"&gt;"&lt;/span&gt;
        &lt;span class="ow"&gt;and&lt;/span&gt; &lt;span class="n"&gt;event&lt;/span&gt;&lt;span class="p"&gt;[&lt;/span&gt;&lt;span class="sh"&gt;"&lt;/span&gt;&lt;span class="s"&gt;after_hours&lt;/span&gt;&lt;span class="sh"&gt;"&lt;/span&gt;&lt;span class="p"&gt;]&lt;/span&gt;
    &lt;span class="p"&gt;):&lt;/span&gt;
        &lt;span class="k"&gt;return&lt;/span&gt; &lt;span class="sh"&gt;"&lt;/span&gt;&lt;span class="s"&gt;high&lt;/span&gt;&lt;span class="sh"&gt;"&lt;/span&gt;

    &lt;span class="k"&gt;return&lt;/span&gt; &lt;span class="sh"&gt;"&lt;/span&gt;&lt;span class="s"&gt;normal&lt;/span&gt;&lt;span class="sh"&gt;"&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;



&lt;p&gt;This will help distinguish between normal activities and events.&lt;/p&gt;

&lt;h2&gt;
  
  
  3. Deter Before the Situation Escalates
&lt;/h2&gt;

&lt;p&gt;Once the event has been validated, the next stage could involve deterrence. The goal is to interfere before the unauthorized activity grows into a larger event.&lt;/p&gt;

&lt;p&gt;Based on the system and situation, deterrence would include:  &lt;/p&gt;

&lt;ul&gt;
&lt;li&gt;Two-way audio communication&lt;/li&gt;
&lt;li&gt;Remote verbal warnings&lt;/li&gt;
&lt;li&gt;Security notifications&lt;/li&gt;
&lt;li&gt;Operator instructions&lt;/li&gt;
&lt;li&gt;Escalation to designated&lt;/li&gt;
&lt;li&gt;property personnel&lt;/li&gt;
&lt;/ul&gt;

&lt;p&gt;*&lt;em&gt;A simple workflow could be: *&lt;/em&gt;&lt;/p&gt;

&lt;p&gt;Verified Event&lt;br&gt;
      ↓&lt;br&gt;
Operator&lt;br&gt;
      ↓&lt;br&gt;
Two-Way Audio&lt;br&gt;
      ↓&lt;br&gt;
Activity Stops&lt;/p&gt;

&lt;p&gt;This is one of the differences between real-time monitoring and a video recording system. A video recording system is helpful after an event occurs.&lt;/p&gt;

&lt;p&gt;A monitoring system, however, can help prevent the activity from becoming an incident.&lt;/p&gt;

&lt;p&gt;&lt;a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Farticles%2Fj4rnnsxt8mwi62rivpy6.png" class="article-body-image-wrapper"&gt;&lt;img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Farticles%2Fj4rnnsxt8mwi62rivpy6.png" alt=" " width="800" height="437"&gt;&lt;/a&gt;&lt;/p&gt;
&lt;h2&gt;
  
  
  4. Respond When Deterrence Is Not Enough
&lt;/h2&gt;

&lt;p&gt;Not all incidents can be stopped after verification or deterrence. An escalation process must thus be in place for the system to work.&lt;/p&gt;

&lt;p&gt;For example:&lt;br&gt;
&lt;/p&gt;

&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight python"&gt;&lt;code&gt;&lt;span class="k"&gt;def&lt;/span&gt; &lt;span class="nf"&gt;response&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="n"&gt;event&lt;/span&gt;&lt;span class="p"&gt;):&lt;/span&gt;
    &lt;span class="k"&gt;if&lt;/span&gt; &lt;span class="n"&gt;event&lt;/span&gt;&lt;span class="p"&gt;[&lt;/span&gt;&lt;span class="sh"&gt;"&lt;/span&gt;&lt;span class="s"&gt;verified&lt;/span&gt;&lt;span class="sh"&gt;"&lt;/span&gt;&lt;span class="p"&gt;]&lt;/span&gt; &lt;span class="ow"&gt;and&lt;/span&gt; &lt;span class="n"&gt;event&lt;/span&gt;&lt;span class="p"&gt;[&lt;/span&gt;&lt;span class="sh"&gt;"&lt;/span&gt;&lt;span class="s"&gt;priority&lt;/span&gt;&lt;span class="sh"&gt;"&lt;/span&gt;&lt;span class="p"&gt;]&lt;/span&gt; &lt;span class="o"&gt;==&lt;/span&gt; &lt;span class="sh"&gt;"&lt;/span&gt;&lt;span class="s"&gt;high&lt;/span&gt;&lt;span class="sh"&gt;"&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt;
        &lt;span class="k"&gt;return&lt;/span&gt; &lt;span class="sh"&gt;"&lt;/span&gt;&lt;span class="s"&gt;escalate&lt;/span&gt;&lt;span class="sh"&gt;"&lt;/span&gt;

    &lt;span class="k"&gt;if&lt;/span&gt; &lt;span class="n"&gt;event&lt;/span&gt;&lt;span class="p"&gt;[&lt;/span&gt;&lt;span class="sh"&gt;"&lt;/span&gt;&lt;span class="s"&gt;verified&lt;/span&gt;&lt;span class="sh"&gt;"&lt;/span&gt;&lt;span class="p"&gt;]:&lt;/span&gt;
        &lt;span class="k"&gt;return&lt;/span&gt; &lt;span class="sh"&gt;"&lt;/span&gt;&lt;span class="s"&gt;monitor&lt;/span&gt;&lt;span class="sh"&gt;"&lt;/span&gt;

    &lt;span class="k"&gt;return&lt;/span&gt; &lt;span class="sh"&gt;"&lt;/span&gt;&lt;span class="s"&gt;close&lt;/span&gt;&lt;span class="sh"&gt;"&lt;/span&gt;

&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;



&lt;p&gt;A response protocol may comprise:&lt;/p&gt;

&lt;ul&gt;
&lt;li&gt;Further camera verification&lt;/li&gt;
&lt;li&gt;Notice to property management&lt;/li&gt;
&lt;li&gt;Escalation to security&lt;/li&gt;
&lt;li&gt;Incident logging&lt;/li&gt;
&lt;li&gt;Emergency response where required&lt;/li&gt;
&lt;/ul&gt;

&lt;p&gt;This will depend on the incident and its circumstances.&lt;/p&gt;

&lt;h2&gt;
  
  
  5. Build the System for Real-Time Monitoring
&lt;/h2&gt;

&lt;p&gt;Real-time reaction cannot be achieved just by using AI detection. The video stream must be transmitted to the operator with a low enough latency as well. Here’s how to design an architecture that separates real-time reaction from long-term storage:&lt;/p&gt;

&lt;p&gt;&lt;strong&gt;Live Video&lt;/strong&gt;&lt;/p&gt;

&lt;p&gt;Camera&lt;br&gt;
  ↓&lt;br&gt;
Media Gateway&lt;br&gt;
  ↓&lt;br&gt;
Low Latency Stream&lt;br&gt;
  ↓&lt;br&gt;
Operator&lt;/p&gt;

&lt;p&gt;&lt;strong&gt;Recorded Video&lt;/strong&gt;&lt;/p&gt;

&lt;p&gt;Camera&lt;br&gt;
  ↓&lt;br&gt;
Video Storage&lt;br&gt;
  ↓&lt;br&gt;
VMS&lt;br&gt;
  ↓&lt;br&gt;
Investigation&lt;/p&gt;

&lt;p&gt;Video technologies like WebRTC allow delivering video streams to browsers with low latency, and events can be sent separately.&lt;/p&gt;

&lt;p&gt;Thus, the real-time reaction channel can be optimized for reaction, and the storage channel for analysis and archival purposes.&lt;/p&gt;
&lt;h2&gt;
  
  
  6. Design for Failure and Incident History
&lt;/h2&gt;

&lt;p&gt;The security of apartments is based on cameras, networks, gateways, servers, and communication services. Each one of these may break down.&lt;/p&gt;

&lt;p&gt;As a result, any monitoring system should monitor the condition of devices independently from security incidents.&lt;/p&gt;

&lt;p&gt;&lt;strong&gt;For example:&lt;/strong&gt;&lt;/p&gt;

&lt;p&gt;Camera offline should never be considered an empty space.&lt;/p&gt;

&lt;p&gt;Furthermore, the monitoring system must maintain an incident log that includes such information as:&lt;br&gt;
&lt;/p&gt;

&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight json"&gt;&lt;code&gt;&lt;span class="p"&gt;{&lt;/span&gt;&lt;span class="w"&gt;
  &lt;/span&gt;&lt;span class="nl"&gt;"event_id"&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt;&lt;span class="w"&gt; &lt;/span&gt;&lt;span class="s2"&gt;"evt_1024"&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt;&lt;span class="w"&gt;
  &lt;/span&gt;&lt;span class="nl"&gt;"camera"&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt;&lt;span class="w"&gt; &lt;/span&gt;&lt;span class="s2"&gt;"garage_04"&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt;&lt;span class="w"&gt;
  &lt;/span&gt;&lt;span class="nl"&gt;"type"&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt;&lt;span class="w"&gt; &lt;/span&gt;&lt;span class="s2"&gt;"restricted_area_entry"&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt;&lt;span class="w"&gt;
  &lt;/span&gt;&lt;span class="nl"&gt;"priority"&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt;&lt;span class="w"&gt; &lt;/span&gt;&lt;span class="s2"&gt;"high"&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt;&lt;span class="w"&gt;
  &lt;/span&gt;&lt;span class="nl"&gt;"verified"&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt;&lt;span class="w"&gt; &lt;/span&gt;&lt;span class="kc"&gt;true&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt;&lt;span class="w"&gt;
  &lt;/span&gt;&lt;span class="nl"&gt;"action"&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt;&lt;span class="w"&gt; &lt;/span&gt;&lt;span class="s2"&gt;"audio_warning"&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt;&lt;span class="w"&gt;
  &lt;/span&gt;&lt;span class="nl"&gt;"status"&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt;&lt;span class="w"&gt; &lt;/span&gt;&lt;span class="s2"&gt;"resolved"&lt;/span&gt;&lt;span class="w"&gt;
&lt;/span&gt;&lt;span class="p"&gt;}&lt;/span&gt;&lt;span class="w"&gt;
&lt;/span&gt;&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;



&lt;p&gt;This provides a history of what was detected, what was confirmed, what was done about it, and how the situation was handled.&lt;/p&gt;

&lt;h2&gt;
  
  
  Final Thoughts
&lt;/h2&gt;

&lt;p&gt;Today’s advanced building security surveillance is evolving far past the basic cameras-and-recording concept.&lt;/p&gt;

&lt;p&gt;The essential flow can be broken down into:&lt;/p&gt;

&lt;p&gt;DETECT → VERIFY → DETER → RESPOND&lt;/p&gt;

&lt;ul&gt;
&lt;li&gt;AI can assis with detection.&lt;/li&gt;
&lt;li&gt;Humans can confirm and provide context.&lt;/li&gt;
&lt;li&gt;Communication in real time can help with deterrence.&lt;/li&gt;
&lt;li&gt;Established procedures for escalation can help with reaction if deterrence does not suffice.&lt;/li&gt;
&lt;li&gt;The essential architectural notion is treating video feeds as real-time security data, not something to review after the fact.&lt;/li&gt;
&lt;li&gt;A camera can show what is going on.&lt;/li&gt;
&lt;/ul&gt;

&lt;p&gt;An advanced monitoring system will help with determining what is important, what needs to happen next, and who needs to be informed.&lt;/p&gt;

&lt;p&gt;&lt;a href="https://ohzsecurity.com/industries/retail-commercial/apartment-complexes/" rel="noopener noreferrer"&gt;Apartment complexes&lt;/a&gt; are a practical example of this approach, where entrances, parking areas, garages, gates, and shared spaces can generate different types of security events. Connecting these areas through real-time video monitoring allows relevant activity to move through the same detect, verify, deter, and respond workflow.&lt;/p&gt;

</description>
      <category>security</category>
      <category>iot</category>
      <category>architecture</category>
      <category>ai</category>
    </item>
    <item>
      <title>Designing a Low-Latency Architecture for AI Video Monitoring</title>
      <dc:creator>OHZ Security - 24/7 Virtual Doorman Remote Guard Surveillance</dc:creator>
      <pubDate>Thu, 13 Aug 2026 14:00:41 +0000</pubDate>
      <link>https://dev.to/ohzsecurity/designing-a-low-latency-architecture-for-ai-video-monitoring-4go</link>
      <guid>https://dev.to/ohzsecurity/designing-a-low-latency-architecture-for-ai-video-monitoring-4go</guid>
      <description>&lt;p&gt;The modern age of video surveillance is evolving beyond the conventional camera-to-recorder-to-review paradigm.&lt;/p&gt;

&lt;p&gt;Real-time applications require that the system be capable of recognizing any event, processing the information instantly, and providing relevant information to the operator. Such a system requires an effective blend of edge computing, AI inference, cloud computing, and real-time communications.&lt;/p&gt;

&lt;p&gt;A Simple Architecture&lt;/p&gt;

&lt;p&gt;IP Cameras&lt;br&gt;
    ↓&lt;br&gt;
Edge Gateway&lt;br&gt;
    ↓&lt;br&gt;
AI Detection&lt;br&gt;
    ↓&lt;br&gt;
Event Processing&lt;br&gt;
    ↓&lt;br&gt;
Cloud VMS&lt;br&gt;
    ↓&lt;br&gt;
Operator&lt;br&gt;
    ↓&lt;br&gt;
Response&lt;/p&gt;

&lt;p&gt;Each layer has a specific responsibility.&lt;/p&gt;

&lt;p&gt;&lt;strong&gt;1. Edge Gateway&lt;/strong&gt;&lt;br&gt;
Edge Gateway accepts camera streams via RTSP and is capable of performing functions like:&lt;/p&gt;

&lt;ul&gt;
&lt;li&gt;Stream management&lt;/li&gt;
&lt;li&gt;Local buffering&lt;/li&gt;
&lt;li&gt;Device health monitoring&lt;/li&gt;
&lt;li&gt;Selected AI processing&lt;/li&gt;
&lt;/ul&gt;

&lt;p&gt;Processing part of the data closer to the camera can help save bandwidth and improve the performance.&lt;/p&gt;

&lt;p&gt;&lt;strong&gt;2. Turning Video Into Events&lt;/strong&gt;&lt;/p&gt;

&lt;p&gt;Rather than streaming all the video frames through the entire application process, computer vision can generate events in structured format:&lt;br&gt;
For instance:&lt;/p&gt;

&lt;p&gt;{&lt;br&gt;
  "camera": "camera-01",&lt;br&gt;
  "object": "person",&lt;br&gt;
  "zone": "restricted",&lt;br&gt;
  "confidence": 0.93&lt;br&gt;
}&lt;/p&gt;

&lt;p&gt;This event is much smaller than the original video stream and can be processed separately.&lt;/p&gt;

&lt;p&gt;Event processing pipeline is normally:&lt;/p&gt;

&lt;p&gt;Camera -&amp;gt; AI Detection -&amp;gt; Event -&amp;gt; Rules Engine -&amp;gt; Operator&lt;/p&gt;

&lt;p&gt;&lt;strong&gt;3. Rules Add Context&lt;/strong&gt;&lt;/p&gt;

&lt;p&gt;Detection by an AI does not necessarily mean a security breach exists.&lt;br&gt;
A rules engine can consider further details such as:&lt;/p&gt;

&lt;ul&gt;
&lt;li&gt;Time&lt;/li&gt;
&lt;li&gt;Location&lt;/li&gt;
&lt;li&gt;Detection zone&lt;/li&gt;
&lt;li&gt;Confidence level&lt;/li&gt;
&lt;li&gt;Site status&lt;/li&gt;
&lt;/ul&gt;

&lt;p&gt;For example:&lt;/p&gt;

&lt;p&gt;Person detected + Restricted zone + After hours = High priority&lt;br&gt;
This method can be used to decrease false alerts.&lt;/p&gt;

&lt;p&gt;&lt;strong&gt;4. Human Verification&lt;/strong&gt;&lt;/p&gt;

&lt;p&gt;While AI may be helpful in identifying and prioritizing activity, human validation can give further context.&lt;/p&gt;

&lt;p&gt;AI Detection -&amp;gt; Rules Engine -&amp;gt; Operator -&amp;gt; Verification -&amp;gt; Response&lt;/p&gt;

&lt;p&gt;In this case, the system takes care of the routine tasks and the operator deals with events requiring context.&lt;/p&gt;

&lt;p&gt;&lt;strong&gt;5. Low-Latency Video&lt;/strong&gt;&lt;/p&gt;

&lt;p&gt;To enable investigations into an event, the system will need to have access to live video with low latency.&lt;/p&gt;

&lt;p&gt;WebRTC technology can be used for low-latency video delivery to browsers, and WebSockets technology for delivering event notifications to operator interfaces.&lt;/p&gt;

&lt;p&gt;Camera -&amp;gt; Edge Gateway -&amp;gt; Media Gateway -&amp;gt; WebRTC -&amp;gt; Browser&lt;/p&gt;

&lt;p&gt;Live-video delivery and archiving of videos could be decoupled to enable optimization of pipelines for their own respective purposes.&lt;/p&gt;

&lt;p&gt;&lt;strong&gt;6. Design for Failure&lt;/strong&gt;&lt;/p&gt;

&lt;p&gt;In practice, real-world networks are imperfect.&lt;/p&gt;

&lt;p&gt;An edge system needs to account for:&lt;/p&gt;

&lt;ul&gt;
&lt;li&gt;Local buffering&lt;/li&gt;
&lt;li&gt;Automatic reconnection&lt;/li&gt;
&lt;li&gt;Device health monitoring&lt;/li&gt;
&lt;li&gt;Network failover&lt;/li&gt;
&lt;li&gt;Store-and-forward events&lt;/li&gt;
&lt;/ul&gt;

&lt;p&gt;A device being offline should be handled differently than a device sending events about lack of activity.&lt;/p&gt;

&lt;p&gt;For instance:&lt;/p&gt;

&lt;p&gt;Camera Offline -&amp;gt; Health Event -&amp;gt; Administrator&lt;/p&gt;

&lt;p&gt;It would help ensure that a network connection problem is not confused with a quiet environment.&lt;/p&gt;

&lt;p&gt;&lt;strong&gt;7. The Complete Architecture&lt;/strong&gt;&lt;br&gt;
The architecture described above separates processing of large volumes of video from small event processing while maintaining the whole process chain intact.&lt;/p&gt;

&lt;p&gt;&lt;strong&gt;Final Thoughts&lt;/strong&gt;&lt;/p&gt;

&lt;p&gt;A contemporary AI-based video surveillance system is a distributed real-time system that follows:&lt;/p&gt;

&lt;p&gt;DETECT -&amp;gt; VERIFY -&amp;gt; DETER -&amp;gt; RESPOND&lt;/p&gt;

&lt;p&gt;The key architectural idea is to treat video as a real-time data source, not simply something to record.&lt;/p&gt;

&lt;p&gt;The fundamental architectural principle is to consider video as a real-time stream rather than something to be recorded.&lt;/p&gt;

&lt;p&gt;Time-critical processing can be done at the edge, cloud services can be used for coordination, and human operators can bring context into the picture.&lt;/p&gt;

&lt;p&gt;The end product is a flexible basis for developing modern AI-enabled video surveillance systems.&lt;/p&gt;

</description>
      <category>ai</category>
      <category>architecture</category>
      <category>performance</category>
      <category>systemdesign</category>
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