Setting Up The H.264 Pip Video Channel - Cisco D9054 Installation And Operation Manual

Setting Up the H.264 PIP Video Channel

To Set Up the H.264 PIP Video Channel
Proceed as follows to set up the H.264 PIP Video Channel:
1. From the user interface of the D9054 HD Encoder, click the Video tab, and click
the PIP/H.264 icon from the sub-pages.
2. The Enable Encoder checkbox enables or disables the Picture-in-Picture
channel. Normally it is disabled (unchecked). The PIP channel displays at
192x192 or 128x96. The default is 192x192.
3. Type the GOP Length. The GOP length must be in the range from 1 to 255.
Hint: Generally it is advantageous to increase the GOP length if the video bit
rate is low, however, lock-up time in the decoder is increased for long GOPs.
Hint: If you need to clip digitally in the picture it is suggested that you use a
closed GOP so that you don't lose a picture. A closed GOP is one that uses no
referenced pictures from the previous GOP at the current GOP boundary. For
example the GOP is closed when it starts with an I frame and subsequent B
frames do not rely on I or P frames from the previous GOP.
4. Set the Video Bit Rate for the PIP channel.
The maximum encoding rate allowed depends on the outgoing TS rate. You
must increase the TS rate, if possible, if you need a higher encoding rate than
displayed. The channel is set to a default of 300 kb/s but can operate in the
range from 200 kb/s to 500 kb/s for 192x192 resolution, or from 150 kb/s to 500
kbps for 128x96 resolution, for 4:2:0 Chroma format.
5. Click Apply.
4038938 Rev A D9054 HDTV Encoder Intstallation and Operation Guide 5-39