L64105 LSI Logic Corporation, L64105 Datasheet - Page 310

• Manufacturer Part Number: L64105
• Description: Mpeg-2 Audio/video Decoder
• Manufacturer: LSI Logic Corporation

9-18
The following display modes are provided for enhancing the display of
full-resolution images:
Video Interface
Display Mode 10 (0xA) - Interlaced Luma
Repositioning/Interlaced Chroma Repositioning. Both the luma
and chroma data is treated as interlaced. The odd lines of the frame
store are used to interpolate the top field, while the even lines of the
frame store are used to interpolate the bottom field. This display
mode is best suited for field-structure, SIF-resolution images, or SIF
format MPEG-2 images.
Display Mode 3 - Progressive Luma/Chroma Field Repeat
Letterbox Filtering. The progressive luma data is repeated each
field time and decimated from four lines down to three using the
on-chip, 4-tap, decimation filter. The chroma data is bilinearly
interpolated to achieve the required decimation. This letterbox
display mode is designed for frame-structure, SIF-resolution images
with 16:9 aspect ratio displayed on 4:3 screens. The main start and
end row positions must be adjusted to account for the 0.75
decimation. The total number of lines per field should be adjusted
according to the following equation:
Display Mode 4 - Interlaced Luma/Chroma Field Repeat. The
luma data is treated as interlaced while the chroma data is repeated
in its entirety in both the odd and even field times. This display mode
is best suited for frame-structure, full-resolution pictures.
Display Mode 5 - Interlaced Luma/Chroma Field Repeat with
Repositioning. The luma data is treated as interlaced. The chroma
data is repeated in its entirety for both fields, but is filtered to improve
its spatial positioning. This display mode is best suited for frame-
structure pictures.
Display Mode 6 - Interlaced Luma/Chroma Line Repeat. The luma
data is treated as interlaced. The chroma data is treated as
interlaced and is line repeated to achieve the 4:2:0 to 4:2:2 chroma
conversion. This display mode is suitable for either field- or frame-
structure pictures.
Lines per Field
=
Main End Row Main Start Row
-----------------------------------------------------------------------------------------------
–
0.75
+
3