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32581C
7.1
Module Architecture
Figure 7-1 shows a top-level block diagram of the Video
Processor. For information about the relationship between
the Video Processor and the other modules of the SC3200,
see Section 2.2 on page 22. The Video Processor module
includes the following functions:
• Video Input Port
— CCIR-656 decoder
— Capture Video/VBI modes
— Direct Video mode
• Video Formatter
— Asynchronous video interface
— Horizontal/vertical scalers
— Filters
GX1 Graphics Data
Capture Video/VBI Data to
GX1 Video Frame Buffer
VIP
VIP Data
Capture Video/VBI
Controller and
Bus Master,
Direct Video/VBI
Controller
Video Data from GX1 Video Port
310
Video
Data
Video
Mux
Figure 7-1. Video Processor Block Diagram
• Mixer/Blender
— Overlay with color/chroma key
— Gamma correction
— Color space converters
— Alpha blender
• TFT interface
• Dot Clock PLL
The following subsections describe each block in detail.
Video Formatter
Horizontal Downscaler,
Line Buffer, Horizontal
and Vertical Upscalers,
and Filters
Mixer/Blender
Overlay with Gamma
RAM and Alpha
Blending
AMD Geode™ SC3200 Processor Data Book
Video Processor Module
TFT_IF
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