Best Practices For Creating Effective Video-Enabled Rooms

Best Practices For Creating Effective Video-Enabled Rooms
BEST PRACTICE
PROJECT
WORKPLACE
Best Practices For Creating Effective
Video-Enabled Rooms
Ⓒ 2013 Cisco and/or its affiliates. All rights reserved.
Content
This document discusses best practice for creating
effective video-enabled rooms for conferences.
Topics covered include:
•
•
•
•
•
•
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Lighting
Whiteboard Placement
Room Acoustics
Standard Microphones
Ceiling Microphones
Presenter and Whiteboard Microphones
Table
Ⓒ 2013 Cisco and/or its affiliates. All rights reserved.
Lighting
Tips
Generally a good light color temperature is 4000 kelvin, but consider
increasing this number if you depend
mostly on daylight as your light source.
A color-rendering index (CRI) of 80 or
better is important. Avoid mixing technologies such as fluorescents and LED
because their color profiles differ.
1
3
2
Tips
Neutral gray colors on walls and tables
improve color appearance.
4
Avoid completely white walls or tables,
a color with reflection value (LRV) of 50
percent is recommended.
Light Essentials
Be aware that video is sensitive to high contrast levels in the
room. Most luminaries are made to avoid glare thus focusing
the effect on the work area rather than people’s faces.
A common problem is insufficient light on people’s faces.
A glare-free luminary producing directive light at an angle
of 45 degrees is optimal for video, but may be challenging
to achieve. Following are some tips on how to improve the
lighting situation within a room.
Ⓒ 2013 Cisco and/or its affiliates. All rights reserved.
1 Avoid illuminating the surrounding walls too much.
This only makes the faces appear darker.
3 Make sure you can reduce sunlight
to a comfortable level.
2 Try to keep the contrast less than 1:1.5. For example, 500 lux on faces implicates maximum 750 lux on the
table and surroundings.
4 Recommended light intensity is 400 to 500
lux on faces.
Whiteboard Placement
Windows
Windows
Endpoint
Whiteboard
Endpoint
Whiteboard Camera
Whiteboard
Whiteboard Essentials
It is best to have the whiteboard visible in the camera
overview. An additional camera allows for greater
flexibility, such as focusing on the whiteboard.
● If the room allows for it, place the whiteboard on the wall opposite the endpoint.
● If the whiteboard is on a side wall, place it so that it is visible in the overview and use an additional camera to
focus on the whiteboard.
● Point the additional camera directly at and centered on
the whiteboard.
Ⓒ 2013 Cisco and/or its affiliates. All rights reserved.
● Place the additional camera at least 5 ft (1.5 m)
above the floor.
Room Acoustics
Acoustic Ceiling
Acoustic Panels
or Curtains
Sound insulated wall and door
Rw
Rw
Acoustic Essentials
Video systems usually work fairly well with most types of
acoustics, but the experience can be a lot better
with a little well-aimed treatment.
For the optimal experience aim for a reverberation time
(RT60) of 0.3 to 0.4 seconds, and ensure that sound absorption is distributed evenly on the walls to avoid flutter
echo from parallel walls. Follow these guidelines:
● Use an acoustic ceiling consisting of tiles with an
absorption class A or NRC of 0.9 or greater.
Ⓒ 2013 Cisco and/or its affiliates. All rights reserved.
- Place absorption on at least two walls, preferably
adjacent walls. Avoid placing it on opposing walls.
● To avoid eavesdropping as well as disturbance of people
located outside the room, we recommend that walls
and doors have appropriate sound insulation. The walls should hold a Sound Reduction Index (Rw) of about 48 dB.
Doors in the meeting room are recommended to hold an Rw of about 35 dB. For more information on how Rw is defined, see the international standard ISO 717-1.
- In order to increase the low frequency absorption,
acoustic wall panels should be mounted so that they
protrude at least 2 in. (5 cm).
● For quality microphone pick-up and comfort in the
room, the ambient noise level should not exceed
30 dB (A-weighted sound pressure level).
● Put acoustic absorption on walls.
- A good amount to use is approximately 0.5 times the ceiling area (Textile curtains also count as absorption).
Standard Microphones
Endpoint
45″—60″ (1.15—1.50 m) apart
5″—20″ (0.13—0.50 m)
from table end
Standard Microphones
● Use Cisco Telepresence omnidirectional microphones
along the center line of the table.
● One microphone generally covers four people.
● The microphone closest to the system should be placed approximately 5—20 in (0.13—0.50 m) from the
table end.
Ⓒ 2013 Cisco and/or its affiliates. All rights reserved.
● Spacing between microphones should be about 45—
60 in (1.15—1.50 m), and a maximum of 45 in (1.15 m) from participants.
● The maximum spacing should only be used in acoustically dampened rooms. In less-dampened rooms, the spacing
should be decreased.
Ceiling Microphones
Audio Science
Audio Science
Endpoint
8′—14′ (2.4—4.3 m)
about 7′ (2.15 m)
above the floor
Ceiling Microphones
In some situations you might want to keep the table free
of microphones. Cisco provides the ceiling microphone,
Audio Science, which can be used in these scenarios.
Following are some guidelines on positioning the
microphone correctly:
Ⓒ 2013 Cisco and/or its affiliates. All rights reserved.
● It can be used with tables seating 8—14 people.
● Align the Audio Science microphone with the table
edge closest to the system. Mount it about 7 ft (2.15 m).
above the floor.
● The microphone must face away from the endpoint.
● For longer tables, mount the Audio Science microphones with a spacing of 8 —14 ft (2.4—4.3 m).
● The maximum spacing should only be used in acoustically
dampened rooms. In less-dampened rooms, the spacing
should be decreased.
Presenter and Whiteboard Microphones
about 5′ (1.5 m)
from the endpoint
Should be about 40″ (1.0 m)
from the wall
Audio Science
Endpoint
about 7′ (2.15 m)
above the floor
Whiteboard Microphone
Should be about 7′ (2.15 m)
above the floor
Whiteboard
2
Addtitional Microphones
Presenter Microphones
Whiteboard Microphones
In scenarios with an active presenter who could be
moving around, an additional ceiling microphone can
be used to capture the speaker’s voice.
● To capture the voice of the presenter, it is recommended to use an Audio Science microphone.
● As an alternative to Audio Science, a directional microphone suspended from the ceiling could be used.
● The microphone must face where the presenter will be.
● It should be mounted about 7 ft (2.15 m) above the floor and 40 in (1.0 m) from the wall.
● It should be mounted well above the floor, about 7 ft
(2.15 m) Distance to the endpoint should be about
5 ft (1.5 m).
Ⓒ 2013 Cisco and/or its affiliates. All rights reserved.
Table
Endpoint
D
W
Fo
V
Table
● To enable everyone at the table to see the screen, the
table width should be slightly wider than the system/
screen(s).
● The Field of View (FoV) of the cameras dictates that the
distance (D) between table and system should not be less
than 0.7 times the width (W) of the table front.
Ⓒ 2013 Cisco and/or its affiliates. All rights reserved.
● We recommend using a slightly slanted table when there are three or more participants seated on the long side of a table. It should be wider on the end closest to the system so that everyone can see the screen and be seen on camera.
PROJECT WORKPLACE
For more information about scenarios
and setup, please visit:
www.cisco.com/web/telepresence/projectworkplace.html
Ⓒ 2013 Cisco and/or its affiliates. All rights reserved.
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