Operating the Equipment Locally
Instruction Manual: evolution 5000 E5500 Mobile Contribution Encoder
Page 3-61
ST.TM.E10033.3
Table 3.38: Group of Pictures Structure Options
Selected Option
Description
IBBP
for successive B frames (IBBPBBPBBPBBPI) – default.
IBP
for operation with B frames (IBPBPBPBPBPI).
IP
for non-B frame operation (IPPPPPPPPPPI) - default for low delay mode.
IBB
IBBIBBIBBIBBIBBIBBI) - professional editing standard.
IB
(IBIBIBIBIBIBIBIBIB) - a superior professional editing standard.
I-Frame
(IIIIIIIIIIIIIII) - for precise editing and compression.
Group of Pictures Length Option
To access the Group of Pictures (GOP) Length option, press the GOP
Length softkey in the
Video
Encoder
Menu
.
This enables the video GOP (Group Of Pictures) structure length to be set.
The structure length determines how regularly an I frame is transmitted.
The I frame provides a regular reference from which predicted frames can
be generated, thereby ensuring that predictions do not become wildly
inaccurate.
NOTE
Some of the settings may not be available if they are not valid for use with other current encoding
parameters. Also, changing the GOP structure automatically changes the GOP length if the current
GOP length is not compatible with the selected structure.
Use the keypad or the + and – softkeys to increment or decrement the
GOP length, and then press the Enter softkey to accept the new value.
Setup/Video/Encoder Edit
GOP Length
+
15
—
Enter
Update using keypad or softkeys
Quit
Table 3.39: Group of Pictures Length Options
Valid Input Range
Description
Min:
1
Max:
15
GOP lengths available depend on GOP
structure selected.
3:2 Pulldown Option
To access the 3:2 Pulldown option, press the 3:2 Pulldown softkey in the
Video
Encoder
Menu
. This enables 3:2 pulldown (film) mode to be
switched on and off.
NOTE…
This option is only available if a 525 line 29.97 Hz (NTSC) video source is selected.
3
Horizontal resolutions of 352, 480, 544 and 720 are only used if auto setting is selected.
