D14635.02—MARCH 2010 32
TANDBERG Codec C90 and Profiles using C90 Administrator guide
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Video Input Source [1..5] Opt imalDefinition Profile
The system will automatica lly choose what resoluti on and framerate to transmit b ased on input resolution /
framerate, available band width and wether ths source i s configured for motion or sha rpness. For motion
sources, this setting ca n be used to adjust how rapidly th e system should increase th e transmitted
resolution when incre asing bandwidth. For inst ance, if the source is a camera i nput is 1920x1080p60, the
system will transmit 1920x720p60 at abo ut 2.2Mb/sec and above with thi s setting set to normal, but wil l
will transmit 1920x720p60 at about 1.1Mb/sec and above wit h this setting set to high. In gene ral you could
choose medium or high if yo u have good quality vide o inputs and good lighting co nditions, while normal
would give a good experie nce in most conditions, inc luding not optimal lightin g.
Valuespace: <Norma l/Medium/H igh>
See Table 1: Optimal definition for syste ms supporting 1080p and Table 2: Opt imal definition for
systems supporting 720p6 0.
Example: Video Input Source 1 OptimalD enition Prole: Normal
Video Input Source [1..5] Opt imalDefinition Threshold6 0fps
For each video input, this se tting tells the system the lowes t resolution where it shou ld transmit 60fps. So
for all resolutions lower th an this, the maximum tran smitted framerate would b e 30fps, while above this
resolution 60fps woul d also be possible, if the avail able bandwidth is adequ ate.
Valuespace: <512_288/768_448 /1024_576/1280_720/Never>
512_288: Set the threshold to 512x288.
768_448: Set the threshol d to 768x448.
1024_576: Set the threshold to 1024x576.
1280_720: Set the threshold to 1280x720.
Never: Do not set a threshold for t ransmitting 60fps.
Example: Video Input Source 1 OptimalD enition Threshold60fps: 1280_ 720
Video Input Source [1..5] Qua lity
When encoding and tran smitting video there wi ll be a tradeoff between h igh resolution and high f ramerate.
For some video sources it i s more important to transm it high framerate than hig h resolution and vice vers a.
The Quality setting s pecifies whether to give pr iority to high frame rate or to hi gh resolution for a given
source.
Valuespace: <Motion /Sharpness>
Motion: Gives the highes t possible framerate. Use d when there is a need for high er frame rates,
typically when a larg e number of participan ts are present or when there i s a lot of motion in the picture.
Sharpness: Gives the hi ghest possible resol ution. Used when you want the hi ghest quality of detail ed
images and graphics.
Example: Video Input Source 1 Quality: Motion
Video Layout ScaleToFrame
Defines what to do if the aspec t ratio of a video input sourc e doesn’t match the aspect ratio of th e
corresponding image f rame in a composition. For ex ample if you have a 4:3 input so urce (like XGA) to be
displayed on a 16:9 output ( like HD720).
Valuespace: <Manua l/MaintainAsp ectRatio/StretchToFit>
Manual: If the differe nce in aspect ratio betwe en the video input sourc e and the target image frame i s
less than the ScaleToFrameThrshold config uration (in percent), t he image is stretched to fit. Unles s the
system will maintain the or iginal aspect ratio.
MaintainAspectRatio : Will maintain the aspec t ratio of the input source, and fil l in black in the rest of the
frame (letter boxing or p illar boxing).
StretchToFit: Will stretch (horizontal ly or vertically) the in put source to fit into the image fra me.
Example: Video Layout ScaleToFrame: MaintainAsp ectRatio
The Video settings, cont... The Video settings, cont...

Table 1: Optimal definition, for sy stems supporting 1080p

w288p30 w448p3 0 w576p30 720p 30 1080p30

Normal 256kbit /s 512 kbit/s 768 kbit/s 1152 kbit/s 2560 kbit/s

Medium 128kbit/s 384 kbit/s 512 kbit/s 768 kb it/s 1920 kbit /s

High 128kbit/s 256 kbi t/s 512 kbit/s 768 kbit/s 1472 kbit/s

Table 2: Optimal definitio n, for systems supporti ng 720p60

w144p60 w288p 60 w448p60 w576p 60 720p60

Normal 128kbit/s 512 kbit/s 1152 kbit/s 1472 kbit/s 2240 kbit/s

Medium 128kbit/s 384 kbit/s 768 kbit/s 1152 kbit/s 1472 kbit/s

High 128kbit/s 256 kbi t/s 512 kbit/s 768 kbit /s 1152 kbit/s

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Contents
Introduction
Advanced configuratio n
Password protection
About monitors
Audio matters
Appendices
Advanced config.