Collaborative Teaching Spaces

Transcription

1 Designing i AV Solutions for Collaborative Teaching Spaces Karl Rosenberg Regional Application Specialist Extron Electronics In lieu of paper evaluations for each session at the Winter Conference, all evaluations may now be taken digitally from your laptop, tablet or smartphone. Download the Winter Conference App at or go to to provide your feedback for each of the sessions you attend. For your safety, please note that emergency exits are located to the left or right of this room.

2 Agenda Collaborative Teaching Spaces Design Challenges AV System Design Considerations Cables Signal Integrity EDID Content Protection

3 CTS Collaborative Teaching Spaces Any space that emphasizes group learning and collaboration Over networked computers Across mobile devices By viewing shared displays

4 CTS Characteristics Supports active learning between groups Allows for easy transfer of information Can effectively display multiple media types from any work station Is flexible enough to accommodate different ways of working TILE Classroom at University of Iowa

5 CTS Locations K - 12 SMART Collaborative Classroom, Providence Spring Elementary, Charlotte, NC

6 CTS Locations Higher Ed Active Learning Classroom, University of California, Berkeley

7 CTS Locations Corporate

8 CTS Locations Government The sp.ace in Building 29 at Johnson Space Center. Image Credit: NASA JSC/Christopher Gerty

9 Technology Design Challenges

10 Virtual Technology HP Visual Collaboration Room 220

11 Installed Devices IncITe Classroom, University of Notre Dame

12 Mobile Learning Devices

13 Environmental Design Challenges

14 Furniture DeBartolo B011 Classroom, University of Notre Dame

15 Windows/Walls Active Learning Classroom, University of California, Berkeley

16 Speakers/Dedicated Video Capabilities Active Learning Classroom, University of Minnesota

17 Closed Equipment Niche Active Learning Classroom, University of Minnesota

18 AV Design Considerations

19 Key Considerations Needs of the people using/supporting the system Speed/ease of setup Even sound distribution Configurable control Video quality Signal integrity it Space appropriate AV furniture/devices Cables Unified network access System flexibility

20 Speed/ease of setup Intuitive User Interface Convenience room location Configurable control Cable connections for control integrated into table Wall-mounted controller Collaboration systems are a turn-key alternative Touchpanels can be desk mounted, lectern mounted, or sit on a tabletop

21 AV Furniture Select space appropriate AV furniture, sources, and displays Presence Podium, SMARTdesks

22 Unified Network Access Remote control and troubleshooting AV system data collection for reporting System-wide monitoring and scheduling on a single platform TCP/IP Network

23 Sound Distribution Room size and acoustics Interactivity ti it between sites Voice reinforcement table or ceiling microphones? Active Learning Classroom, University of Minnesota

24 Sound Distribution Use of sound reinforcement Speakers Voice and program audio reinforcement Wall mounted speaker Stereo sound Directional sound loud in front of classroom, uneven e sound distribution Ceiling mounted speakers Better sound distribution Number of speakers suggested

25 Video Considerations System Sources, Processors, and Displays Playback Source Processor Display Annotator Blu-ray Laptop Projector Streaming Encoder Satellite Receiver Computer Display Switcher Tablets & Smartphones Document Camera Video Conference Monitor

26 Video Source Considerations Analog Source Connections Digital Source Connections VGA: RCA Desktop Laptop Document Camera Video Conference for composite audio & video: VCR/DVD Combo Player HDMI: Laptop Blu-ray DVD FlipCam Cable Box DVI-D: PC Desktop Cable Box DisplayPort (and minidp): Laptop Desktop Thunderbolt: Desktop Laptop

27 Digital Video Considerations Signal Integrity Cable selection Distance and image quality EDID Extended Display Identification Data Resolution Color Space Audio Content Encryption HDCP High-bandwidth Digital Content Protection

28 Signal Integrity Testing Eye pattern Measures overall signal quality Formed by repeated sampling of a digital signal Used to determine the likelihood lih of bit errors Eye Mask Identifies when bit errors occur The signal touching the mask is an indication of a bit error Bit Errors Bit Errors

29 Signal Integrity Cable Selection Distance and quality how far is too far? Cable quality are all cables the same? Connections how many connection points? Performance Length Adapters

30 Cable Selection Distance HDMI for shorter runs CATx for longer runs Typically under 50 feet Across the enterprise

31 Cable Selection Image Quality Contributors to digital signal degradation Cable attenuation - length/quality Cable capacitance - length/quality Impedance mismatch - connectors Noise coupling - cabling/products Crosstalk and jitter - cabling/environment Digital signal recovery is based on receiver s ability to distinguish high and low transitions Eye closes due to resistance and capacitance Transitions widen due to reflections, noise, and crosstalk Result: bit errors Digital System

32 Image Quality Image quality does not degrade like analog Good signal = Bit errors = Vertical lines Pixelization Colored dots Too many bit errors = No image Cliff Effect

33 HDMI Cable Considerations Are all HDMI cables the same? HDMI connector, damaged by a faulty cable; pins are lifted or pushed back, resulting in intermittent itt t or lost signals

34 Anatomy of a High Quality HDMI Pro Cable

35 CTS HDMI Solution Workgroup using laptops and a tablet HDMI Switcher AC Power Controller

36 Twisted Pair Cable Advantages Twisted pair extenders can support a variety of signals for longer cable runs Digital video Supports data rates up to 6.75 Gbps, Deep Color to 12-bit, 3D and HD lossless audio formats Digital audio Bi-directional RS-232 control and IR Ethernet Remote power

37 Twisted Pair Transmission Cable Characteristics Supports CATx cable Solid conductor, shielded twisted pair cable with shielded connectors should always be used Skew-free cable should not be used with video systems

38 Twisted Pair Cable Properties Twisted Pair Cable Construction Multiple l construction ti approaches exist within a given category Different conductor types and gauge sizes Different shielding techniques Stranded center conductor cabling should not be used Solid center conductors provide better conductivity due to more surface area Ensured performance over distance

39 Twisted Pair Cable Properties Shielded cable protects against outside interference Air conditioning units Power from adjacent cabling Crosstalk from other cables or within the same cable Radio interference from walkie-talkies Image quality symptoms of noisy environments Image drop-out or flashing No image at all

40 Image Quality Digital video signal loss cliff effect Good LCD Monitor al Quality Signa Acceptable Signal Level Bad Cable Length Analog Signal Digital Signal

41 Twisted Pair Transmission Different types of twisted pair shielding Cable Name Outer Shielding Individual Pair Shielding U/UTP None None F/UTP Foil None U/FTP None Foil S/FTP Braided Foil SF/UTP Braided & Foil None

42 Twisted Pair Installation Cable infrastructure and patch points Up to 4 patch points recommended d HDMI Receiver Matrix Switcher Typical scenario for AV connectivity

43 CTS Twisted Pair Solution Touchpanel Twisted Pair Transmitter Control Processor Twisted Pair Receiver

44 CTS Twisted Pair Solution Full-Range Ceiling Speakers Touchpanel Twisted Pair Switcher with Integrated TP Transmitter Power Amplifier Volume Control Module Control Processor HDMI Scaling Receiver

45 EDID Extended Display Identification Data

46 EDID A data standard provided by a digital display that describes its capabilities to a video source EDID Sequence: Power on PC Display sends EDID data Hot Plug Detect Computer attempts to match Computer requests EDID display parameters DDC connection Native EDID information sent to graphics card 1680 x 1050

47 EDID Strategy How to get the correct data to the source so it can output the correct signal? Supported resolutions Color space Audio formats supported 16:9 1080p 16: x :3 1024x768 5:4 1280x1024

48 Supported Resolutions Displays have different native resolutions Most ideal EDID configuration depends d on requirements Advisable to select EDID from pre-stored settings for each source PC with DVI output EDID Minder 1080P 720p 1 Input Output p 720p 1080p 2 2 PC with DVI output 720p EDID Minder 1024x p x768 Blu-ray with HDMI Matrix Switcher 1680x Laptop with HDMI

49 EDID and Audio Management Which audio format? Analog or digital What is the audio signal path? Separate or embedded Breakaway Emergency announcements Background music Surround sound or stereo? Extract t or embed Latency issues? Interface Format Correction

50 Audio Setup Challenges Setting Digital Audio

51 High-Bandwidth Digital Content Protection

52 HDCP HDCP is an encryption protocol applied at the digital interface DVI, HDMI and DisplayPort Sources Sinks Repeaters Computers Blu-ray Player CATV STV Monitors Projectors Receivers Switchers DAs Prevents unauthorized access to protected content Implementation in DVI is optional

53 HDCP Authorized CTS Applications Videoconference Lecture capture Broadcast feed

54 HDCP Challenges HDCP Authorized Some sources, such as a Mac laptop or ipad, will encrypt ALL content being output even if it does not require encryption Keynote Safari Note Numbers

55 HDCP Solutions Mac laptop Thunderbolt to HDMI output Matrix Switcher 1080p display HDCP compliant Input Output ipad HDMI output Matrix Input HDCP Source Matrix Output HDCP Sink Display not HDCP compliant Non-HDCP Source Non-HDCP Sink

56 System Flexibility, Scalability and Reliability

57 Current and Future Technology Needs Flexibility and Scalability Understand d connectivity it and infrastructure t plan to allow for interoperability and future-proofing Ensure you specify systems and components that can stand the test of time Sources and displays may be refreshed in 3-5 years while infrastructure t may need to last years

58 Reliability of Collaborative Systems No annual licenses Incremental cost Cost attributed to: Number of sources Number of displays Full matrix vs. 1 input per table to route to main displays Size of signal management system ays es and Displa ber of Source Numb Size of Budget

59 CTS Designing AV Solutions Recap A solid design strategy Defines the application Manages EDID effectively Contains a solid understanding of connectivity and infrastructure Provides an efficient user interface and operation Considers future needs as well as budgetary factors

60 Open Discussion

61 Comments? Karl Rosenberg

62 Designing i AV Solutions for Collaborative Teaching Spaces Karl Rosenberg Regional Application Specialist Extron Electronics In lieu of paper evaluations for each session at the Winter Conference, all evaluations may now be taken digitally from your laptop, tablet or smartphone. Download the Winter Conference App at www bicsi org/apps or go to Download the Winter Conference App at or go to to provide your feedback for each of the sessions you attend.