Specifications

3
Video Encoder Settings
Target Bit Rate
The Target Bit Rate is the maximum number of bits per second generated by the device. It is
calculated over an average of 5 seconds, so it is possible to see some peaks if you look at the target
over a period of 1 second or less. You should set the Target Bit Rate to fit your storage requirements
and network settings. If the amount of motion is low, the encoder could generate fewer bits than the
target, which could lead to long-term storage under the target. This is why the target is, in fact, a
maximum. For best-quality video, you can set the Target Bit Rate to its maximum value (6,000 Kbits
per second). The encoder will not be exceeding the target if the unit is set in Constant Bit Rate (CBR)
mode. In Constant Frame Rate (CFR) mode, the encoder could exceed the target once it reaches the
Maximum Quantizer. (See Quantization on the next page.)
Target Frame Rate
The Target Frame Rate is the number of frames per second encoded and transferred by the encoder.
This parameter can be set for 1 to 7, 10, 15, or 30 fps in NTSC (1 to 6, 8, 12, or 25 fps in PAL). A
higher frame rate will produce more fluid video, but will require a higher bit rate and more processing
power.
Image Resolution
Image Resolution refers to the level of detail in an image. A higher resolution means a greater number
of pixels and therefore a more detailed image. Each resolution corresponds to a specific number of
pixels (columns X lines) in each image of a video sequence. All CIF-defined formats result in images
with an aspect ratio of 4:3, and these are not square.