Specifications

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Cisco TV CDS 2.5 ISA Software Configuration Guide
OL-24788-01
Chapter 4 Configuring the CDS
System Level Configuration
Table 4-11 MPEG Tuning Fields
Field Description
Ingest MPEG Settings
Program ID
Standardization
If Program Identifier (PID) Standardization is enabled, MPEG-2 video assets have their PIDs standardized
at ingest so that most assets use the same PIDs.
It may be important that all assets use the same PIDs, for example, if multiple assets are going to be part
of a playlist and you cannot guarantee that all assets were created with a consistent set of PIDs. The
standard PID assignment follows the CableLabs recommendations (see
MD-SP-VOD-CEP2.0-I02-070105). Any changes made to the asset is reversed if an FTP OUT is
performed. Only standard audio/video assets that may be used in playlists have their PIDs standardized;
data downloads, audio only, carousel files, and such other files are left unmodified. Changing the PIDs
does not affect normal VOD playback of the asset.
PSI When Program ID Standardization is enabled, you have an option to enable or disable PSI. Enabling
Program ID Standardization only standardizes the PIDs, not the Program Specific Information (PSI). If
you choose Enabled for PSI, the Program Association Table (PAT) and the Program Map Table (PMT) are
standardized so that they do not vary at all between one piece of content and another. Use these settings
progressively to try and resolve issues with playlists (black screen or no video after transitions, temporary
glitches, and so on). Use Program ID Standardization only first, reingest the content, and play the
content. If there are still problems, try both enabling Program ID Standardization and PSI. If there are
problems playing the content back that was ingested with both of these options enabled, disable them and
reingest the content to see if the issue resolves.
Sequence End
Remove
If Sequence End Remove is enabled, a SEQ END header that is present at the end of the asset (and only at
the end) is removed on ingest. Doing this allows fades between assets in a playlist , which can make the
playlist appear more seamless. Any changes made to the asset is reversed if an FTP OUT is performed.
Removing the SEQ END, if present, makes no difference to the VOD playback of the asset.
Rate
Standardize
If Rate Standardize is enabled, MPEG-2 video assets have their rates standardized at ingest so that most
assets use one of two standard rates, 3.75 Mbps for SD assets and 15 Mbps for HD assets. These settings
follow CableLabs recommendations. Standardizing the rates can be helpful in certain configurations if
playlists are going to be created containing multiple assets and you cannot guarantee that all assets were
created with consistent rates. For example, some QAM devices do not handle rate changes during playout.
Consult your QAM vendor for guidance on whether to enable Rate Standardize. Any changes to the asset
are reversed if an FTP OUT is performed.
Playlist Trick-Mode Restrictions
Fast Forward
Resume
When Fast Forward Resume is disabled (default setting), it means the next segment continues at the same
speed as the trick-mode restricted segment (usually this is normal play speed).
When Fast Forward Resume is enabled, it means the next segment is played at the same speed as the
previous non-restricted segment.
As an example, Segment 1 and Segment 3 are unrestricted and Segment 2 has the fast-forward trick-mode
speed restricted. If a fast-forward command is issued during the playing of Segment 1, fast-forwarding of
Segment 1 occurs until the beginning of Segment 2 is encountered where the fast-forward trick-mode is
restricted. Fast-forwarding stops and Segment 2 is played at normal speed. Fast-forwarding resumes at
segment 3.