Web Browser Interface — Video Menu
Page 5-32
Reference Guide: EN8000 MPEG-4 Part 10 (H.264/AVC) Encoders
ST.RE.E10233.1
This menu permits the selection of Picture-in-Picture video encoding parameters.
They are listed alphabetically to help with retrieving the information.
Path: / Configure / Video Menu / PIP Encoder
Table 5.12: PIP Encoder Option Descriptions
Selected Item
Options
Description
Adaptive GOP:
This option is not valid in HD progressive modes.
The GOP structure is adapted in regard to the number of B and P frames
according to the motion detected in the video. It should be left ON unless
there is a compatibility issue with the receiver population.
4:3
Video image is encoded at 4:3 aspect ratio. Default.
16:9
Video image is encoded at 16:9 aspect ratio.
Aspect Ratio:
Does not affect the video
encoding but rather indicates
what desired aspect ratio for the
decoded image (but not the
pixel).
If no other mechanisms such as WSS (Wide Screen Signaling) in the VBI are used, the outputted video
image will use this aspect ratio.
Soft
As soft as could be required by the broadcaster
Medium
Compromise between sharp and soft
Sharp
Filter is at the maximum bandwidth possible for the resolution selected
Auto
Automatically adjusts the bandwidth depending on the video bitrate and
resolution settings.
Bandwidth:
The Bandwidth Option controls
the low pass filtering of the video
before it is compressed.
Reducing the bandwidth produces slightly less bits in the compressed bitstream for the same set of
encoding parameters. Refer to
ST.AN.BW.E10074
for more information.
Bitrate:
Defines the maximum bitrate
generated by the video encoding
module.
This can be set to be
between 0.1 Mbit/s and a
maximum of 1.0 Mbit/s.
CPB Size:
0.08 Mbit/s to 10.0 Mbit/s
Copyright:
This option controls the
Copyright flag in the bitstream.
If set to On the bitstream is shown to be protected by copyright.
GOP Length:
Defines the maximum distance in
steps of video frames between
two consecutive I frames in the
encoded bitstream.
12 to 250 frames
As the video encoding module inserts I frames when it will improve the
encoding quality, the time between two I frames is often less.
GOP Structure:
Sets the GOP structure.
IP
P frames are used between the intra-coded I frames.
I Frame Intvl:
Displays the maximum time in
seconds between two
consecutive I frames in seconds.
This is calculated from the video frame rate and the GOP length specified
above.
MCTF:
Enables Motion Compensated Temporal Filtering.
Standard
The default mode, should be used unless channel change is an issue.
Low Delay
Standard mode but with a video decoder buffer.
Mega Low Delay
Standard mode but with a video decoder buffer
Mode:
Defines how the maximum
decoder buffer size in terms of
time.
Seamless Var. Delay
This is a VBR mode primarily for use in statmux systems.
