Ki Pro GO File Based Recorder/Player v1.0 49 www.aja.com
Ki Pro GO Encoding Parameters
H.264 and Bitrates
KiPro GO encodes using the h.264 High profile. The bitrate is variable and frame
rate dependent. See table below.
Table 2. Ki Pro GO Encoding Bitrate Table
Video
Format
Original
(Mbits/sec)
Target Bit Rates
(Mbits/sec)
Encoding variation by
input format
Low Med High
1080p60
2488.3
5
10
15
1080p59.94
2488.3
5
10
15
1080p50
2073.6
4.2
8.3
12.5
1080p30
1244.2
2.5
5
7.5
1080p29.97
1244.2
2.5
5
7.5
1080p25
1036.8
2.1
4.2
6.3
1080p24
995.3
2
4
6
1080p23.98
995.3
2
4
6
1080psf30
1244.2
2.5
5
7.5
1080psf30 input => 1080p30
1080psf29.97 1244.2
2.5
5
7.5
1080psf29.97 input => 1080p29.97
1080psf25
1036.8
2.1
4.2
6.3
1080psf25 input => 1080p25
1080psf24
995.3
2
4
6
1080psf24 input => 1080p24
1080psf23.98 995.3
2
4
6
1080psf23.98 input => 1080p23.98
1080i60
2488.3
5
10
15
1080i60 input => 1080p60
1080i59.94
2488.3
5
10
15
1080i59.94 input => 1080p59.94
1080i50
2073.6
4.2
8.3
12.5
1080i50 input => 1080p50
720p60
1105.9
2.2
4.4
6.7
720p59.94
1105.9
2.2
4.4
6.7
720p50
921.6
1.9
3.7
5.6
625i50
414.7
0.8
1.7
2.5
625i50 input => 625p50
525i59.94
419.9
0.8
1.7
2.5
525i59.94 input => 525p59.94
Entropy Encoding
Ki Pro GO uses the CABAC (Context Based Adaptive Binary Arithmetic Coding)
algorithm for entropy encoding.
I-frame and GOP
Ki Pro GO encodes an I-frame once per second, which makes the GOP (Group-
Of-Pictures) size equal to the frame rate of the video. For example, with 1080p50
video the GOP size will be 50, or 1 second.