D14129.02—NOVEMBER 2008 40
Codec C90 Administrator Guide
Contents Introduction Getting started About the menus About the settings Settings Library Cameras Appendices Contact us
General room guidelinesThe physical conditions
When building a video meetin g room, or using an existing room f or
video meetings there are a few guid elines to consider.
Lighting
The illumination should be dis tributed evenly in the room to obt ain •
low contrast
The ideal light intensity is a li ttle higher than in an ordi nary meeting •
room. Typically, the luminous intensity sh ould be 800–1400Lux,
measured at the table with an inci dent light meter
Seating area and table
The seating area and table shou ld be non-shiny and non-pat terned•
The seating area should allow al l participants to see the mo nitor•
Walls
The color of the wall should be in goo d contrast to skin tonality •
Light blue is a complementar y color to skin tonality, it give s a good
contrast and is commonly used
Acoustically reflective sur faces (such as glass o r concrete) should •
be covered with curtains or sou nd treatment
Audio
The Noise Floor (the sum of all the no ise sources) should b e less •
than 44 dBC
The reverberation time should b e 0,3 to 0,5 seconds•
Ventilation
The requirements for ventilatio n may be a little higher than i n an •
ordinary meeting room. Consu lt the specifications for t he monitor
for data about the energy consum ption. The TANDBERG Codec
C90 together with the TANDBERG Precisi onHD 1080p camera
has the following specificatio ns:
Max rating – 175 Watts•
Normal operation – 110 Watts•
Standby – 110 Watts•
Keep in mind the Noise Floor (se e Audio)•
Velocity creates noise, therefore ke ep velocity of air low•
The room equipment
When placing and using the room e quipment there are a few
recommendations and guide lines to consider.
The microphone
The microphones should be eve nly distributed on the tabl e. Avoid •
positions where they can be hidd en behind obstacles li ke laptop,
projector or other equipment pl aced on the table
Do not place a microphone close to powe r outlets or similar •
arrangements on the table. Th e microphone will pick up no ise from
these arrangements quite stro ngly
The camera
The camera should be able to “see” a ll participants in the roo m. •
Use the pan, tilt and zoom features to adju st the picture.
The PC
PC’s placed on the table should not cover th e microphones as this •
will reduce the audio quality a t the far end
Position of the system
Position the video system in such a way th at all participants •
attending the meeting are visib le to the far end.
If appropriate, the far end should b e able to see people enterin g or •
leaving the room
The document camera
The document camera shoul d be close to the chair person o r a •
designated controller of the doc ument camera for ease of us e
Make sure this person is visible o n screen while carry o ut the task•
Other peripherals
Arrange all the periphera ls so that the chair person ca n reach each •
of them to point, change the display, DVD, and still be f ully visible
on screen while carry out th e task
Environmental considerations
This section explains how to carr y out basic adjustment s and simple
tests to ensure that you send and recei ve the best possible image a nd
audio quality when using you r system.
Iris control and lighting
By default the system camera will u se an automatic iris to compen sate
for changes in lighting. In additi on to this feature, you may furthe r
assist the system to maintain the bes t possible image qualit y by
paying special attention to envi ronmental lighting and ba ckground
colors as described below.
Remember the system will send li ve images of both yourself an d your
immediate surroundings.
Avoid direct sunlight on the subje ct matter i.e. yourself, the •
background or onto the camera lens a s this will create harsh
contrasts
Avoid placing the seatings in front of a w indow with natural •
daylight, as this will make the faces of p eople very dark
If light levels are too low you may need to cons ider using artificia l •
lighting. As described above, dir ect illumination of the subj ect
matter and camera lens shoul d be avoided
When using artificial ligh ting, daylight type lamp s will produce the •
most effective results. Avoid col ored lighting
Indirect light from shaded sou rces or reflected light from p ale walls •
often produces excellent resu lts
Avoid harsh side lighting or strong l ight from above. Strong sunlig ht •
from a window or skylight may put p art or all of the subject ma tter
in shadow or cause silhouettin g
Loudspeaker volume
The audio system will use the Digit al Natural Audio Module ( DNAM)
which is integrated in the system. The volu me of the audio is controlled
by the Volume key on the remote control.