TANDBERG E5780, Справочное руководство

Страница: 115 / 298

Operating the Equipment Locally — Video Menu: Video Encoder Menu
Reference Guide: evolution 5000 E5780 and E5782 Encoder Page 4-37
ST.RE.E10135.4
Selected Item Options Description
Component Tag:
Defines the optional
component tag assigned to
this video stream.
Reflex Enable:
Enable (On) or disable (Off)
Reflex. Only available if M2/ESO2/VBR purchased.
Indicated bitrate (SD Only): This option controls the video bitrate that is signalled in the transport stream. If
set to 'Max Value' the maximum possible bitrate for the profile and encoding
mode is signalled. This is the way all previous generations of TANDBERG
Television’s Encoders have operated. If set to 'Actual Value', and the encoding
mode is not a seamless mode, then the bitrate signalled is the actual video
bitrate set on the Encoder.
There is also a 2 Mbit/s option which signals 2 Mbit/s for use with a particular
decoder range which requires this value.
Copyright:
Indicates whether the
information in the bitstream
is shown to be protected by
copyright. It is for status only and cannot be changed.
Original:
Indicates whether the
bitstream is an original or a
copy of an original
bitstream. It is for status only and cannot be changed.
Scene Cut Detection: In SD mode, this is a status only option. The Encoder detects that a scene
change has happened and so intra-codes some or all of the blocks. That is, the
picture is coded without any reference to previous frames.
In HD mode, the Encoder also detects that a scene cut has occurred but, in
this mode, inserts a complete new I frame to change the GOP structure to start
on the new scene. This, again, stops any references to previous frames.
However, changing the GOP structure may cause problems with older
generation receiving equipment. Hence, Scene Cut Detection can be turned off
in HD Encoder mode.
Insert VBV Delay (SD Only): If this option is turned on the Encoder will insert vbv_delay values into the
picture header. This is required by some older set-top boxes. The default value
is off.
per GOP
The default option is’, when the Encoder will insert a PES header at the start of
every GOP.
PES Header:
Controls how often the
Encoder inserts a PES
header into the transport
stream.
per Picture The Encoder inserts a PES header at the start of every picture. The PES
header contains the PTS (Presentation Time Stamp), and some set-top boxes
require this to be sent more frequently than once every GOP, hence the PES
per Picture option.
Sequence Header AFD Location (SD Only):
Indicates where the AFD
information is transmitted.
Picture Header
Auto Selects the optimum number of bits depending on the profile, coding mode and
video bitrate.
8 bits
9 bits
10 bits
Intra DC Precision
11 bits Available in 422P@ML
Small Rate Buffer Mode (SD Only)
Medium
Refer to Chapter 6 for information about using this option.