EN5990 Encoder for MPEG-4 Part 10
15
!
Video Input
– select the HD-SDI video input in terms of frame rate and
resolution required. If desired, the Encoder can detect the input frame rate
automatically and adjust the encoding accordingly (see the
Reference Guide
for details).
!
To modify some individual parameter value from that of the selected operating
scenario, exit the
Video Source
Menu
and select the
H.264/AVC
Encoder Menu
. The menu lists all of the parameters that can be changed by
the operator, including:
Mode
– select the mode to determine the decoder buffer size.
Bitrate
– select the desired maximum bitrate from the video encoder.
This is constrained so that the maximum total bitrate for the whole
bitstream is not exceeded.
Resolution
– select the resolution of the decoded video image. The use
of this parameter is discussed in
Section 5.1
.
GOP Length
– select the maximum number of frames between
consecutive I-frames. This value can be varied between 1 and 180
frames. The video encoder may choose to use I-frames more frequently if
the content requires it.
PID
– defines the program identification number for the H.264/AVC
elementary stream in the transport stream.
4.5
Set the Audio Options
The audio menus consist of a set of audio service menus (4A – 4D, A and B). The
services A and B are associated with the generic architecture and have limited
operations. Each service menu allows the operator to define the input source and
type. The input type (currently limited to uncompressed or compressed AC-3)
defines what encoding can be performed on that service. The remainder of the
service defines the encoding parameters and the associated language.
4.6
Set Service Information
Navigate to the
System Menu,
and then
Service Information
to modify this
information. This sets the name on the front panel. The bitstream carries some
self-descriptive information that can be displayed on many of the decoders.
