Cisco Systems 2900 ユーザーズマニュアル

The I-frame interval configures the number of partial frames that occur between full frames in the video 
stream. For example, in a scene where a door opens and a person walks through, only the movements of 
the door and the person are stored by the video encoder. The stationary background that occurs in the 
previous partial frames is not encoded, because no changes occurred in that part of the scene. The 
stationary background is only encoded in the full frames. Partial frames improve video compression rates 
by reducing the size of the video. As the I-frame interval increases, the number of partial frames 
increases between full frames. Higher values are only recommended on networks with high reliability. 
This setting is only available with H.264 and MPEG-4 compression standards.

Quality of Service (QoS) for Differentiated Services Code Point (DSCP) is a code that allows the 
network to prioritize the transmission of different types of data. This setting is only available with H.264 
and MPEG-4 compression standards.

If you are not familiar with DSCP, contact your network administrator before changing this setting.

Your network must be configured to use QoS. If you are unsure if your network is QoS-aware, 
contact your network administrator.

The Advanced Sharpening setting enhances picture detail by sharpening the edges in the picture. When 
this mode is enabled, there is a trade-off between image quality and the resources required for processing 
power. The maximum camera resolution and image rate will not be available, but the edges of the image 
seem sharper. Only use this setting if you cannot achieve the sharpness level you want by adjusting the 
digital processing settings of the camera. The default setting for Advanced Sharpening is Off.

Audio is not supported when using the camera with Cisco Video Surveillance Manager (VSM).

CIF

 

2.5 FPS @ 256 kbps

CIF

2.5

256

CIF

2.5

256

CIF

 

1 FPS @ 128 kbps

CIF

1

128

CIF

1

128