Chapter 12 - MPEG decoder
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12.5
Display of MPEG video parameters
As soon as a live picture can be seen, the MPEG decoder displays the following parameters in a
window at the bottom right of the screen.
Profile and level:
e.g. MP @ ML
Chroma format:
e.g. 4:2:0
Video resolution:
e.g. 720*576
LetterBoxFormat:
4:3 or 16:9
The parameter window can be displayed or hidden at any time using the
←/→
keys.
12.6
Video bit rate measurement
The MPEG decoder measures the current bit rate of the video stream being broadcast while a live
picture is shown. It is shown in the unit [Mbit/s] in the window described in the above section. The
measuring time is 1 second.
12.7
Dynamic program switching
Some program providers split their broadcast into regional content at specific times. This means
that, for example, 4 programs may appear in the MPEG program list, which has the same content
at certain times and different content at other times. The program map table (PMT) in the data
stream therefore changes over time. In this way, the station can prompt the receiver to use different
packet identities (PIDs).
In the standard setting, the MPEG decoder of the instrument uses the PMT that was sent at the
time of the last program search. With other words a static PMT.
The dynamic PMT update function can be activated using
MODE
->
Settings
->
Dyn. program
switching
. If you start the program now, the decoder continually searches for a new PMT version.
If the instrument detects a change in the PMT, the current program is stopped, the message
"Dynam. program switching" appears and then the program is restarted with the updated PIDs.
This setting remains active until it is deactivated in the menu above, or until the next restart.
