# Initiate Audio-Video Stream

PhysicalFunction

In-Flight Entertainment System > In-Flight Entertainment System > Physical Architecture > Physical Functions > Root Physical Function > IFE System > Manage Audio Video Diffusion > Broadcast Stored Audio and Video Streams > Initiate Audio-Video Stream

This function is in charge of initializating a streaming operation. It reads the file(s) to be streamed in the digital media library and prepares the streaming header that is going to be sent to the target player (either seat TV or cabin screen). The stream header basically includes all information required to perform the decoding of the streams.

## Incoming Functional Exchanges

Exchange | Source | Description | Allocated Exchange Items
--- | --- | --- | ---
Broadcast Data | Prepare Broadcasts |  | Media Broadcast Data

## Outgoing Functional Exchanges

Exchange | Target | Description | Allocated Exchange Items
--- | --- | --- | ---
Audio Video Packets | Send Audio Video Packet |  | Audio-Video Packets
Stream Header | Synchronize Audio Video |  | Audio-Video Stream Header

## Realized Elements

- Broadcast Audio Video Stream

## Diagrams displaying "Initiate Audio-Video Stream"

- [PAB] [BUILD] All PCs, PFs, FEs
- [PAB] [BUILD] Template
- [PDFB] [CTX] Broadcast Stored Audio and Video Streams
- [PFBD] All Physical Functions
- [PAB] [CTX] Watch Imposed Video on Cabin Screen FC
- [PAB] [CTX] Start Playing VOD Movie FC
- [PAB] Focus on Network Transport