From PS3 Development Wiki
AV Manager is part of the sysmgr within LV1.
It is used to control the display and audio output of the PS3.
- Communicates with RSX (0x28000000000) and Syscon (0x24000080000).
- Syscon handles EDID, HDCP (digital video prototection, always enforced on by syscon for CEX) and HDMI controller stuff (including CEC, power ondemand).
- RSX handles the audio/video signal output. (Resolution, colour output format (RGB, YCC601, YCC709), Scaling, and input color format (R8G8B8X8, R5G6B15, A1R5G5B5, etc...) which is transparently handled by MultiAV for analog output