POSSIBLE Projector Subunits (Subsystems) and Their Contents Rick Landau, Dell, and Projector & Display Management BOF 2006/09/13

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

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)

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

5 General Information Identification – 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 status values (may be here or in related groups) – E.g., video connector in use, video mode, audio source, etc.

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

7 Covers Description Status

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

9 Signal Sources Video Audio

10 Light Source Lamp type, technology, part number for replacement – Multiple lamps for some DLPs – Even backlighting is replaceable in LCDs – Replaceable modules of LEDs – Maybe multiple part numbers for a single item (e.g., different brightnesses) Status Age, unit, max age On/off cycles Power save mode settings – Blanking, standby, off (may need careful wording to avoid submarine patents) – Timeouts, enable/disable – No-signal image

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) Optional to protect trade secrets – 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, dynamic color balance for colored targets – Scaling and/or cropping video mode to physical display Color space: 4-2-2, 4-4-4

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

13 Cooling Fans – Name, location, part number for replacement, replacement cycle – Status – Speed setting, reading, maybe very coarse measurements – Maybe thresholds for speeds Filters – Name, location, part number for replacement – Age, unit, replacement cycle Temperature and other thresholds – Multiple – Simple sensors or scalar settings

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

15 Interfaces (Every connector, including hand remote control) Enable/disable – Including power switch Status

16 Transport Mechanisms Description Enable/disable For protocols spoken on interfaces, e.g., – IP parameters: addr, mask, broadcast, DNS, DHCP – Wireless parameters: IP, WEP, WPA, wi-fi radio – USB parameters – IR format – Serial line protocols May need to include multiple entries in the network stack, e.g., IP and HTTP, MMS, RealMedia, etc. (The combination of interface, channel, and video mode parameters needs a very general data model, not just linear lists of settings.)

17 Interpreters, Codecs Interpreter types available – E.g., JPG, PDF – Packetized video – MPEG Capabilites, interactions between content, transport, connector

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

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

20 Alerts Log of previous alert conditions Asynchronous delivery – Methods: traps, , SMS, pager Enable/disable classes of alert conditions

21 FRUs (Field Replaceable Units) Part numbers, and serial numbers if available, for field- replaceable units Subunit ID Description Part number Serial number

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 should submit PWG "Letter of Assurance" stating intellectual property claims and non-claims.

23 Next Steps Describe use cases for management of projectors and displays 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

24 Next Meeting Monday, Sept 25 PM (US) / Tuesday, Sept 26 AM (Asia)

25 Use Cases Basic asset inventory: what do I have installed, what spare parts do I need to stock? ND Predict consumption of spares: how old are the lamps, filters, when will they need replacement? ND Restore device to its default setup. RBL Read the setup of the device to establish default. RBL Restore device to profile appropriate to next usage, depends on customer. RM Turn device on/off based on hours of operation. RR Turn projector off every night to save power and lamp. RR Predict usage of consumables based on environmental history, e.g., humidity, dust. HM Does the firmware need updating?

26 Representational Considerations If a management application will make decisions based on a piece of data, then the data must be rigidly structured. – Integers instead of strings – Enumerated values where possible