GRASS VALLEY PROFILE XP PVS Series, System Manual

Page: 129 / 352

Selecting the channel type
23 July 2004 Profile XP System Guide
129
The channel types that appear in the drop-down list depend on the hardware capabilities
of the media platform. DVCAM, DVCPRO 25 and 50 channels only appear when Video
Processor boards are present. HD/SD and HD MPEG channel types appear only when
high definition encoders, decoders, and I/O boards are present. SDTI channel types
appear only when the optional SDTI I/O board is installed.
The channel types you choose will affect how many channels you can operate at the
same time. On Profile XP systems with separate MPEG encoders and decoders, an
MPEG Player/Recorder channel consumes both an encoder and decoder, but uses only
one at a time. Defining channels that can only play or only record uses resources more
efficiently, but does not allow you to play and record using a single channel. Enabling
browse video consumes a standard definition encoder, preventing it from being used
with broadcast quality video.
To change the channel type:
1. Select Channel Configuration in the Configuration Manager window. The Channel
Configuration dialog box appears.
2. Select the tab for the channel you want to modify.
3. Select an appropriate channel type. Depending on the channel type, different codec
or encoder/decoder information is displayed below the configuration tree.
Video quality and crosspoints remain the same after changing channel type.
If you select one of the SDTI channel types, configuration is different than for the
other channel types. Go to “Selecting playout aspect ratio conversion” on page 137.
NOTE: The Browse Video option is available only in media platforms equipped
with standard definition MPEG encoders or video codecs configured as MPEG
encoders. Browse video is not available with high definition MPEG encoders.