Jitter Buffer

What is a jitter buffer? 

A jitter buffer is a temporary storage area used in VoIP (Voice over Internet Protocol) systems to collect and manage incoming audio data packets — small units of digitized audio information transmitted over the network. By buffering these packets before they are played out, it compensates for variable delays (jitter) in packet arrival times caused by multiple reasons. This improves call quality with smooth and continuous audio playback, reducing delays and preventing distortion. Jitter buffers can be static, with a fixed size, or dynamic, adjusting to current network conditions. 

Here are the benefits of using a jitter buffer: 

• Prevents audio clipping by ensuring complete delivery of all packets before playback. 
• Allows for seamless transitions between network types, like switching from Wi-Fi to cellular, without call drops. 
• Supports high-quality audio in environments with frequent network interruptions, such as during travel or in crowded public spaces. 

When do you need to use a jitter buffer? 

Network congestion: Maintain audio quality during peak times when multiple users share the same network. 

High-bandwidth activities: Reduce delays and audio issues during video conferencing or live streaming sessions. 

Mobile usage: Enhance call quality for users on the go, facing variable connectivity. 

Unstable internet: Smooth out audio in situations where the internet connection is unpredictable or fluctuating.