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2.2.5 Bit Rate
Supported encoder bit rates are available via the drop down box. This bit rate is the
combined audio and video bit rates. Increasing the bit rate will improve the quality of the
audio/video so long as the bit rate does not surpass 60% of the chosen baud rate (Section
2.4.1.1). Under most conditions a bit rate of 28000 should be used.
2.2.6 Frame Rate
Video frame rates of 5, 10, 15, 20 and 25 frames per second are supported by the
GV1000. Increasing the frame rate will improve the quality of the video although under
most conditions a frame rate of either 10 or 15 frames per second should be used.
2.2.7 Motion Search
Currently only 8 pixel motion searches are available however future releases may support
16 pixel searches to further improve the video encoding capabilities of the GV1000.
2.2.8 ME Search Accuracy (Pixel)
Full pixel motion estimation (ME) search accuracy is supported by the GV1000 which
allows for optimal video encoding.
2.2.9 GOP
Group of pictures (GOP) configures the spacing between high detail I frames and lower
detailed P frames and can range from 0 to 60. As I frames contain more information than
P frames when the GOP is reduced the bit rate used will increase and when the GOP is
increased the bit rate used will drop. To maintain video quality and to control the bit rate
a GOP of 20-40 should be used. When using a high GOP setting, such as 30 or more, the
I Frame Detect (Section 2.2.11) should be checked to ensure consistent video quality in
high motion situations.
2.2.10 AC Prediction
Enabling AC Prediction will reduce the overall data produced by the encoder thereby
lowering the bit rate needed by the GV1000.
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Genieview part Number GV-02-1005 Rev A
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