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1.2.6. Video Decoders
• MPEG MP@HL decoder
• Decode of a single HD (MP@HL) stream
• Decodes of ISO-13818-2 MP@ML, MP@HL
• Decode of all ATSC-compliant formats
• Slice-level and frame-level error concealment
• The decoder engine can decode MPEG-compressed bitstreams as defined in the following
specifications:
- ISO/IEC 13818-2, “Information Technology - Generic Coding of Moving Pictures and Associated
Audio Information: Video,” (Up to MP@HL)
- A/53, “ATSC Digital Television Standard,” (Table 3)
- DTVMDB04, “DIRECTV MPEG-2 Video Bitstream Specification for the IRD”
• Integrated NTSC decoder
• 3D adaptive comb filter
- Eliminates dot crawl from vertical or horizontal transitions
- Eliminates dot crawl from single pixel lines
- Eliminates false color from high frequency horizontal luma
- Performs ideal YC separation for still image
- No loss in horizontal or vertical chroma detail
- No loss in horizontal or vertical luma detail
- Performs well both on real video images and on test patterns
• Adaptive horizontal PLL
- Automatically adjusts loop bandwidth for signal conditions
- Automatically detects VCR source and enters optimum tracking mode; most decoders require a
“VCR mode” bit to be set to optimally handle VCR signals
- Automatically detects VCR special effects mode and compensates
- Comb filter automatically disabled when VCR source is detected
• Robust sync and DC setup acquisition
- DC setup and sync recovery is very robust even in the presence of noise, ghosting, and unlock
condition
- Automatic switch over to “fine” mode operation once rough lock is acquired
• Chroma edge enhancement
- Improves the horizontal transition of the chroma edge
• VBI decoder
- Performs VBI data capture and data slicing embedded in the video lines (composite, S-Video,
analog RF input)
• JPEG decoding
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