---
title: "Dolby E Guard Band"
slug: "dolby-e-guard-band"
updated: 2024-12-19T11:31:06Z
published: 2024-12-19T11:31:06Z
canonical: "docs.telosalliance.com/dolby-e-guard-band"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.telosalliance.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Dolby E Guard Band

Dolby E line position (guard band placement) is a small section of null data, as part of the bit stream, to act as a buffer to avoid frame and CRC errors. The measurement of where the guard band ends and the SMPTE 337M Dolby E data burst starts is often called the "line position." This relates to a specific video line to which the start of the Dolby E data burst is aligned.

There is a setting in SurCode for Dolby E Encoder that, when enabled, dynamically calculates and injects the correct Dolby E line position into the encoded bit stream: “Prepend guard band to encoded file.”