Cisco 8620, Справочное руководство

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Cisco Video Surveillance 8620/8630 IP Camera Reference Guide
Chapter 5 Configuration
Media > Video
Figure 5-6 Smart FPS
By queuing and re-encoding the old frames from a static scene, both the computing efforts and
the size of P frames are reduced. It is beneficial for keeping up with the frame rate requirements.
A default frame difference threshold, 2%, is embedded in firmware for returning from Smart
FPS to normal encoding when motions occur.
Note
Compared with Smart Stream II, Smart Stream III has two more configurable options: Smart
Q, and Smart FPS
–
Smart codec—Smart codec effectively reduces the quality of the whole or the non-interested
areas on a screen and therefore reduces the bandwidth consumed.
You can manually specify the video quality for the foreground and the background areas.
Select an operation mode if Smart codec is preferred:
- Auto tracking—The Auto mode configures the whole screen into the non-interested area. The
video quality of part of the screen returns to normal when one or more objects move in that area.
The remainder of the screen where there are no moving objects (no pixel changes) will still be
transmitted in low-quality format.
-Manual—The Manual mode allows you to configure 3 ROI windows (Region of Interest, with
Foreground quality) on the screen. Areas not included in any ROI windows will be considered
as the non-interested areas. The details in the ROI areas will be transmitted in a higher-quality
video format.
As shown in Figure 5-7 , the upper screen may contain little details of your interest, while the
sidewalk on the lower screen is included in an ROI window.
As the result, the lower screen is constantly displayed in high details, while the upper half is
transmitted using a lower-quality format. Although the upper half is transmitted using a lower
quality format, you still have an awareness of what is happening on the whole screen.