---
title: CVImageChromaField.SampleLocation.dv420
framework: corevideo
role: symbol
role_heading: Case
path: corevideo/cvimagechromafield/samplelocation/dv420
---

# CVImageChromaField.SampleLocation.dv420

The Cr and Cb samples are alternatingly co-sited with the left luma samples of the same field.

## Declaration

```swift
case dv420
```