# Synchronize Audio Video

PhysicalFunction

In-Flight Entertainment System > In-Flight Entertainment System > Physical Architecture > Physical Functions > Root Physical Function > IFE System > Manage Audio Video Diffusion > Display Video and Play Audio > Synchronize Audio Video

This function is responsible for providing the decoding functions with the synchronization information needed to play back the audio and video streams together. In most cases, the file header, most of the metadata and the synchro chunks are specified by the container format.

## Incoming Functional Exchanges

Exchange | Source | Description | Allocated Exchange Items
--- | --- | --- | ---
Stream Header | Initiate Audio-Video Stream |  | Audio-Video Stream Header

## Outgoing Functional Exchanges

Exchange | Target | Description | Allocated Exchange Items
--- | --- | --- | ---
Sync Metadata | Decode Audio Packets |  |
Sync Metadata | Decode Video Packets |  |

## Diagrams displaying "Synchronize Audio Video"

- [PDFB] [CTX] Display Video and Play Audio
- [PAB] [BUILD] All PCs, PFs, FEs
- [PAB] [BUILD] Template
- [PFBD] All Physical Functions
- [PDFB] [CTX] Play Audio on Seat TV
- [PAB] Focus on SVDU Audio Video Playing
- [PDFB] [CTX] Play Video Stream on Seat TV
- [PAB] [CTX] Start Playing VOD Movie FC
- [PAB] Focus on Network Transport