User Manual of AData ATX H.264 DVR
Stream Type:
“Video” stream only.
Resolution:
2CIF is 704*288 for PAL and 704*240 for NTSC.
Bit Rate Type:
There are two options: “Variable” and “Fixed”.
If you select variable bit rate, DVR will adjust the actual bit rate according to the video
movement. When there is not much movement, DVR will use low bit rate, while there is much
movement, DVR will use high bit rate. In this case, DVR can save HDD usage and network
bandwidth.
If you select fixed bit rate, DVR will use the fixed bit rate to compress iamge. The bit rate
size is defined in “Max Bit Rate” option. In this case, we can calculate the recorded file size and
network bandwidth that we need.
Max Bit Rate:
If you select variable bit rate, when the video input has great movement, we
need to limit the max bit rate. The max bit rate has following options (bps): 32K, 48K, 64K, 80K,
96K, 128K, 160K, 192K, 224K, 256K, 320K, 384K, 448K, 512K, 640K, 768K, 896K, 1M, 1.25M,
1.5M, 1.75M, 2M and “User define”.
For 2CIF resolution, the typical bit rate is 256Kbps for 6FPS. Of course, you will select the
proper max bit rate based on the camera, background and image quality requirement.
Bit rate:
You can select bit rate size for fixed bit rate type. It is the same as “Max Bit Rate”.
Image Quality:
If you select variable bit rate type, you can define image quality. There are 6
options: Highest, Higher, High, Average, Low and Lowest. High image quality needs high bit rate
size.
Frame Rate:
Frame per second. Options are: Full (PAL is 25 FPS and NTSC is 30FPS), 20,
16, 12, 10, 8, 6, 4, 2, 1, 1/2, 1/4, 1/8, 1/16. For low frame rate, you can select low bit rate size.
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Summary of Contents for ATX H-264
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