Polycom RMX 2000/4000 Administrator’s Guide

The following Video protocols are supported:

H.261 - the video compression algorithm mandatory to all endpoints. It is used by endpoints that do not support other protocols.

H.263 - a video compression algorithm that provides a better video quality than H.261. This standard is not supported by all endpoints.

H.264 - a video compression standard that offers improved video quality, especially at line rates lower than 384 Kbps.

Video Resolutions in CP

The RMX always attempts to connect to endpoints at the highest line rate. If the connection cannot be established, the RMX attempts to connect at the next highest line rate at its highest supported resolution.

The video resolution is also defined by the Quality settings:

Motion, when selected, results lower video resolution.

Sharpness, when selected, sends higher video resolution.

The combination of frame rate and resolution affects the number of video resources required on the MCU to support the call.

Table 2-1Video Resolution by Line Rate, Frame Rate & Video Resources

Maximum

Minimum

Maximum

Video Resources Required

Resolution

Line Rate Kbps

Frame Rate

MPM+

MPM

 

 

 

CIF

128

30

1

1

 

 

 

 

 

2CIF/WCIF

256

30

2.66

2

 

 

 

 

 

SD

256

15

2.66

2

 

 

 

 

 

SD *

256

30

2.66

4

 

 

 

 

 

SD *

1024

60

4

Not Supported

 

 

 

 

 

HD720p

1024

30

4

4

 

 

 

 

 

HD720p

1920

60

8

Not Supported

 

 

 

 

 

HD1080p

4096

30

8

Not Supported

 

 

 

 

 

*SD includes all resolutions above 2CIF (576 x 352 pixels) and below HD (720 x 1280 pixels)..

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Polycom 2000/4000 manual Video Resolutions in CP, Cif, 2CIF/WCIF