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CPP100
SECTION 6
CPP1OPS
25/10/06
www.snellwilcox.com
Version 1 Issue 6
6.8
Video Analysis Flags
Background
The ‘Prefix’ Compression Pre-Processor range has been designed with the following primary goals:
•
To provide ‘clean’ decoding and high quality interfacing to a wide variety of input sources such as PAL or
NTSC composite and 625/525 component signals.
•
To remove or reduce picture impairments caused by electronic processing or satellite transmission
failures.
•
To limit the bandwidth of the picture to a level commensurate with the MPEG encoder bit rate.
•
To generate video analysis information which a downstream MPEG encoder can use.
Video Analysis Information
Prefix has been designed to provide the following analysis information:
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Shot change detection
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Advanced Shot Change detection
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Film 3:2 sequence detection for 525 film originated material
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Explicit 3:2 sequence data for 525 film originated material
•
Sequence change detection
•
Single Field Flag
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Film/Video
Identification
•
Film frame pairing for 625 originated film
•
Input Noise floor level
•
Filter Status