1. POSSIBLE Projector Subunits (Subsystems) and Their Contents
Rick Landau
Dell
2006/08/24

2. Proposal and Examples Only
Suggestions based on model that we discussed last week
Possible contents of the various subunits
Suggestive lists, not exhaustive
Long lists, need to decide later
What to include in the specs
What is mandatory versus optional
Leave room for expansion 2

3. Need Formal Definitions
We need to define subunits formally
What are its purpose and content?
How it is distinguished from other subunits?
Then define data items within subunits formally
Name, contents, semantics, usage
What shall we call it, in SNMP and Web contexts?
What does it contain? How do the agent and the user interpret its contents?
How do the agent and the user manipulate it?
Careful to distinguish setting versus state
(Probably not precise data syntax, which sometimes depends on the access protocol) 3

4. Subunits of a Projector
General information
Localization
Covers
Display
Signal Sources
Light Source
Video Quality
Optics
Cooling
System controller
Interfaces
Channels
Interpreters
Console
Audio
Alerts
FRUs 4

5. General Information Identification Status Settings
Manufacturer, model, serial number
Status
Power state
Age, unit
Temperature, unit
Settings
Current language for console, SNMP, web server
Date, time
Power on/off
Current values (may be here or in related groups)
E.g., video connector in use, video mode, audio source, etc. 5

6. Localization Language, region, character set
If this group is absent, assume English 6

7. Covers
Description
Status 7

8. Display
Physical size (for display, not projector): Horizontal, Vertical, unit
(Note that Horizontal, Vertical, Width, and Height will be tricky to define, given that the device may be mounted in different positions.)
Resolution: W pixels, H pixels
Pixel aspect ratio
Color model, color depth, bits
Mounting options: landscape, portrait, upside down
Mounting settings: front/rear, floor/ceiling, landscape/portrait 8

9. Signal Sources
Video
Audio 9

10. Light Source Lamp type, technology, part number for replacement Status
Multiple lamps for some DLPs
Even backlighting is replaceable in LCDs
Block-replaceable LEDs, too
Status
Age, unit, max age
On/off cycles
Power save mode settings
Blanking, standby, off
Timeouts, enable/disable
No-signal image 10

11. Video Current source (here or in General group? Probably general)
Current mode settings
Lines, aspect ratio, interlace/progressive
Color system
Picture mode: PowerPoint, photo, video, cinema
Appearance
Color temperature
Brightness, contrast, gamma (more than one parameter, choice of curve from set, separate curves per color)
Color intensities
Saturation, sharpness, tint
White intensity
Noise reduction
Settings per source
Mode
H and V position, size
Others
Other features
Picture-in-picture, picture-by-picture settings, closed captioning
Scaling video mode to physical display
Color space: 4-2-2, 4-4-4 11

12. Optics Focus level Zoom level Keystoning H and V levels
Autofocus enable
Zoom level
Keystoning H and V levels
Autokeystone enable
(Again, Horizontal, Vertical, Up, Down, Left, Right need to be defined very carefully) 12

13. Cooling Fans Filters Temperature and other thresholds
Name, location, part number for replacement, replacement cycle
Status
Speed setting, reading, maybe very coarse measurements, maybe thresholds
Filters
Name, location, part number for replacement
Age, unit, replacement cycle
Temperature and other thresholds 13

14. System controller Multiple controllers Identification
Firmware versions
Upgradeable?
Battery backup status
Timer programmed events
Controller status or errors, esp. for subcontrollers 14

15. Interfaces (Every gezinta, including hand remote control)
Enable/disable
Status 15

16. Channels Description Enable/disable
For protocols spoken on interfaces, e.g.,
IP parameters: addr, mask, broadcast, DNS, DHCP
Wireless parameters: IP, WEP, WPA, radio
USB parameters
IR port parameters
(The combination of interface, channel, and video mode parameters needs a very general data model, not just linear lists of settings.) 16

17. Interpreters Interpreter types available E.g., JPG, PDF
Packetized video 17

18. Console Buttons Lights Physical display (e.g., LCD panel on device)
Description
Enable/disable functions for some buttons
Lights
Description, color capabilities
Physical display (e.g., LCD panel on device)
Contents
On-screen display
Localizable 18

19. Audio Current source Mute, volume, tone, treble, bass, theater sound
Noise reduction 19

20. Alerts Log of previous alert conditions Asynchronous delivery
Methods: traps, 20

21. FRUs
Part numbers, and serial numbers if available, for field-replaceable units
Subunit ID
Description
Part number
Serial number 21

22. Additional Questions
Need a clear statements of intellectual property considerations
Example:
This specification includes no information on the subject of patents, trademarks, or licenses.
The presence of a management object does not imply a license to implement a related feature using any particular technology.
All vendors need to submit PWG "Letter of Assurance" stating intellectual property claims and non-claims. 22

23. Next Steps Define architectural subunits
Establish a template for specification of a data item
Begin to define data items, starting with easy ones
Examples of MIBs contributed by vendors 23

24. Next Meeting
Monday, Sept 11 PM (US) / Tuesday, Sept 12 AM (Asia) 24