ADT DVR7800S-U Series User Manual page 177

Hybrid Standalone DVR User Guide
Code Stream Type
This includes main stream and motion stream. Select different encode frame rates from different
recorded events. The system supports Active Control Frame function (ACF), which enables you to
record in different frame rates. For example, you can use a high frame rate to record important
events, record scheduled events at a lower frame rate and set different frame rates for motion
detection recording.
Compression
Main Stream video supports H.264. The Sub Stream supports H.264, MJPG.
Resolution
The system supports various resolutions. Make your selection from the dropdown list.
Frame Rate
Select a value in frames per second. (PAL: 1–25 f/s; NTSC: 1–30 f/s).
Bit Rate Type
Select CBR for Constant Bit Rate or VBR for Variable Bit Rate.
Bit Rate
Main Stream Video: Set the bit rate to change the video quality. The larger the bit rate, the better
the quality. Refer to the Reference Bit Rate below.
Sub Stream Video: In CBR mode, the bit rate here is the maximum value. In dynamic video, the
system needs to lower the frame rate or video quality to ensure this value.
Reference Bit Rate
This lists the recommended bit rate range according to the resolution and frame rate you have set.
I Frame Interval
This lets you set the P frame amount between two I frames. The value ranges from 1 to 150. Default
value is 50; recommended value is frame rate *2.
Audio Enable
Check this box to enable audio functions.
Watermark Enable / String
Use this function to verify whether the video has been tampered with. Select the watermark bit
stream, mode and character. The default string is DigitalCCTV. The string can only include numbers,
characters and the underscore character. Maximum length is 85 digits.
Buttons
 Copy. Click this button to copy the current channel's setup to other channels.
 Save. Click to save the changes you have made.
 Refresh. Click to refresh the Web connection.
 Default. Click to restore default values.
DVR7800S-U Series Hybrid DVR User Guide
4 Web Service
167