# Broadcast Audio Video Streams

SystemFunction

In-Flight Entertainment System > In-Flight Entertainment System > System Analysis > System Functions > Root System Function > IFE System > Manage Video and Audio Diffusion > Broadcast Audio Video Streams

This function is responsible for broadcasting existing audio and video media as well as transmitting audio announcements coming from the aircraft. Transmitting audio and video streams means:

- sending them to each passenger (on Seat TVs)

- sending them to the cabin screens

- providing the cabin crew with a status of their running imposed videos.

## Incoming Functional Exchanges

Exchange | Source | Description | Allocated Exchange Items
--- | --- | --- | ---
Audio Video Media | Store Digital Media |  |
VOD Movie Control Command | Handle VOD Movie Controls |  |
Imposed Video Control Command | Handle Imposed Videos Controls |  |
VOD Movie Status | Manage Passenger Service Interruptions |  |
Audio Stream | Send Audio Announcement |  |

## Outgoing Functional Exchanges

Exchange | Target | Description | Allocated Exchange Items
--- | --- | --- | ---
Played Audio Video | Watch Video on Private Screen |  |
Displayed Video | Watch Video on Cabin Screen |  |
Audio Stream | Play Sound in Cabin |  |
Imposed Video Playing Status | Play Airline-Imposed Videos |  |
Audio Signal | Listen to Audio Announcement |  |
VOD Movie | Manage Passenger Service Interruptions |  |

## Realizing Elements

- Acquire Audio Stream from Aircraft
- Forward Audio Stream to Aircraft Cabin Speakers
- Process Imposed Video Controls
- Broadcast Audio Video Stream
- Prepare Broadcasts
- Broadcast Stored Audio and Video
- Play Audio-Video Stream on Seat TV
- Play Video Stream on Cabin Screen
- Receive Imposed Video Playing Status
- Display Imposed Video Playing Status on Cabin Terminal
- Process Audio Announcement

## Diagrams displaying "Broadcast Audio Video Streams"

- [FS] Perform Audio Announcement
- [SDFB] [CTX] Manage Video and Audio Diffusion
- [ES] Perform Audio Announcement
- [SDFB] [CAPABILITY] Provide Audio and Video Intercommunication Means
- [SFBD] All System Functions
- [SDFB] [BUILD] All Functions
- [SDFB] [CAPABILITY] Provide Video Entertainment Services
- [ES] Start Playing VOD Movie