Ericsson AVP 1000 Reference Manual page 71

To achieve the lowest possible encoding delays, the Low Delay Buffer mode can
be used. In this case, the recommended GOP structure is still IBBBP. To achieve
even smaller delays, a smaller number of B pictures can be used. The IBP GOP
structure is the best compromise between latency and picture quality and the IP
GOP structure gives the lowest possible delay, but may impact on video quality.
Table 3.7
Video Quality
1080i 29.97 Hz
720p 59.94 Hz
1080i 25 Hz
720p 50 Hz
Profile
High@Level 4.0 is recommended for 4:2:0 mode and bit rates below 20 Mbps.
High@Level 4.1 will achieve the same performance, but allows higher bit rates up to
62.5 Mbps.
Hi422-10bit@Level 4.1 is recommended for better quality performance and allows
bit rates up to 80 Mbps.
Bit Rates
The recommended bit rate depends on the Profile and Level chosen.
HEVC HDTV 4:2:0 Recommendation
For HD HEVC Main Profile Level 4.0 High Tier 4:2:0 8 bit, the typical bit rate is
around 12 Mbps.
HD HEVC Main Profile Level 4.1 High Tier 4:2:0 8 bit is supported by professional
STBs and allows higher bit rates to be used. Typically this profile is used for bit rates
above 25 Mbps.
HEVC UHDTV 4:2:0 Recommendation
For UHD HEVC Main 10 Profile Level 5.1 High Tier 4:2:0 10 bit, the typical bit rate is
around 30 Mbps.
HEVC HDTV and UHDTV 4:2:2 Recommendation
On video with strong color content on 4:2:2 HEVC HDTV, the bit rate should be set
at 9 Mbps or higher for HDTV and 20 Mbps for UHDTV. At a bit rate below 9 Mbps
for HDTV and 20 Mbps for UHDTV, the video quality is likely to be better in the 4:2:0
format. Video content with less color, e.g. film material, the bit rate can also be used
at a lower bit rate in 4:2:2 format.
EN/LZT 790 0023/1 R16A
GOP Length
GOP Length
32
60
24
52
Getting Started
3-29