Hanwha Vision

Hanwha Vision Two Way Audio Delay: Troubleshooting Guide

Experiencing a delay in your Hanwha Vision two-way audio? Our guide helps you troubleshoot and fix latency issues for clear, real-time communication.

Is this your issue?

A noticeable lag between when you speak and when the audio plays from the camera's speaker.
The person at the camera cannot hear you in real-time.
Conversations are choppy and difficult to understand.
Audio and video feeds are out of sync.
The audio quality is poor or distorted.
The delay is worse at certain times of the day.
The app shows a 'Poor Connection' warning when using two-way talk.

Sound familiar? The guide below will help you fix it.

How to Fix Hanwha Vision Two-Way Audio Delay

Two-way audio is a critical feature of Hanwha Vision (formerly Hanwha Techwin/Wisenet) security cameras and intercoms, allowing for real-time communication. However, a noticeable delay or lag can make conversations difficult and frustrating, undermining the feature's usefulness. This latency, where there's a significant gap between speaking and being heard, is a common issue in IP-based communication.

This guide will explain the primary causes of two-way audio delay and provide you with effective troubleshooting steps to minimise it for clearer, more natural conversations.

What Causes Two-Way Audio Delay (Latency)?

The delay you experience is known as latency. It's the time it takes for your voice to be captured, digitised, compressed, transmitted over the network, decompressed, and played through the speaker at the other end. Several factors contribute to this round-trip time:

Network Congestion: The most common culprit. If too many devices are using your network (both locally and on your internet connection), the audio data packets can get delayed.
Weak Wi-Fi Signal: If the camera is connected via Wi-Fi and has a poor signal, it has to constantly re-transmit data packets, which introduces significant delays.
Low Internet Upload Speed: Your voice travels from your phone or PC up to the internet to reach the camera. A slow upload speed creates a bottleneck, causing a lag.
Audio Codec and Quality Settings: High-quality, uncompressed audio requires more bandwidth. If the network can't handle it, delays can occur.
Processing Power: The device you're using to view the camera (your phone or computer) and the camera itself need time to process the audio.

Steps to Reduce and Troubleshoot Audio Delay

You can significantly reduce audio lag by optimising your network and camera settings.

1. Strengthen the Network Connection

This is the most effective way to combat latency.

Use a Wired Ethernet Connection: If possible, connect your Hanwha camera to your network using an Ethernet cable instead of Wi-Fi. A wired connection is faster, more stable, and virtually eliminates the risk of signal interference, providing the lowest possible latency.
Improve Wi-Fi Signal: If you must use Wi-Fi, ensure the camera has a strong signal. Move the camera closer to your Wi-Fi router or access point. Consider upgrading to a mesh Wi-Fi system for better coverage throughout your property.
Reduce Network Load: Temporarily pause any high-bandwidth activities on your network, such as large downloads, 4K video streaming, or online gaming, and then test the two-way audio. If the delay disappears, network congestion is the issue.

2. Adjust Camera Audio Settings

You can configure the camera to use less bandwidth for audio, which can help on slower networks.

Change the Audio Codec: Access your camera's web interface by typing its IP address into a browser. Navigate to Video & Audio > Audio. You will see a setting for Codec. While G.711 offers high quality, it uses more bandwidth. Try switching to a more efficient codec like AAC or G.726. These codecs compress the audio more, using less data and potentially reducing the delay.
Lower the Bitrate: In the same menu, you may see an option for Bitrate. Lowering the bitrate can also reduce the amount of data being transmitted, which can help improve performance on congested networks.

3. Update Camera Firmware

Manufacturers constantly work to improve the performance and efficiency of their devices.

Check for the latest firmware for your Hanwha Vision camera model on their official website.
Follow the instructions in the camera's web interface to update the firmware. This can resolve underlying software issues that may be contributing to the audio processing delay.

4. Test Your Internet Speed

Use a speed testing application to check your upload speed. For smooth two-way talk, you ideally want an upload speed of at least 1-2 Mbps per camera that is actively streaming. If your upload speed is consistently low, you may need to contact your internet service provider to discuss upgrading your plan.

By taking these steps, you can systematically identify the bottleneck and significantly improve the two-way audio performance of your Hanwha Vision camera.

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Frequently Asked Questions

Yes, network latency is the primary cause of audio delay. A weak Wi-Fi signal, high network congestion (many devices using the internet), or a slow internet upload speed can all contribute to the delay between when you speak and when your voice is heard.

If your camera is connected via Wi-Fi, try moving it closer to your router to improve signal strength. For a more stable connection, using a wired Ethernet cable instead of Wi-Fi is the most effective way to reduce network-related latency and eliminate delay.

In your camera's settings (via the web interface or your VMS), navigate to the audio settings. Look for the audio codec and try switching from a high-quality codec like G.711 to a more compressed one like G.726 or AAC. This reduces the amount of data being sent, which can lower the delay.

Yes, firmware updates often include performance improvements for audio/video streaming and network handling. Ensure your Hanwha Vision camera is running the latest firmware version by checking the device settings page in the web interface. This can help resolve underlying software issues causing the delay.

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