CU - See Me

Conference Application Architecture Considerations

Richard Cogger
IETF MMUSIC
July 1994

Argue for:

Integrated UI
Central BW Management
UI <----> BW Management and Conference Control

Figure 1 (GIF - 10859 bytes)

Figure 2 (GIF - 16170 bytes)

UI and Conference Control

Capable:

   Video          send  
                       }    encode
                  rcv   
   Audio          send  
                       }    encode
                  rcv    
   Aux Data       types

Currently:

   Video          sending/willing          off
                  watching you             off to you
                                           off generally
   Audio          speaking       off       off
                  recent         to        generally
        rcv       privately      you
                  available
        send      mic on         off       off
                  private        for       generally
                                 you

BW Management

Control

In response
On event
On timer (subject to adaptive cap)

Audio

(If anyone wants to hear)
Right away, full BW
Best requested encode

Video

(If anyone watching)
Subject to cap (adaptive, -audio +const, -aux)
Best requested layers
Wait to grab frame

Aux Stream

Low BW
Piggyback on video
Example: cursor trk

Aux Data (per type)

(If anyone wants type)
Portion of current cap
Priority
- FG
- BG
- forget unless...