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Revision 3.0

Video Processor Module (Continued)

6.1

MODULE ARCHITECTURE

Figure 6-1 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 SC2200,

see Section 1.2 on page 16. 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

• Mixer/Blender

— Overlay with color/chroma key

— Gamma correction

— Color space converters

— Alpha blender

• Outputs

— CRT interface with DACs

—TFT interface

• Dot Clock PLL

The following subsections describe each block in detail.

Figure 6-1. Video Processor Block Diagram

VIP

Capture Video/VBI

Bus Master,

Video Formatter

Horizontal Downscaler,

Line Buffer, Horizontal

and Vertical Upscalers,

and Filters

Mixer/Blender

Overlay with Gamma

RAM and Alpha

Blending

Capture Video/VBI Data to

GX1 Video Frame Buffer

VIP Data

Video Data from GX1 Video Port

Video

Mux

Video

Data

TFT_IF

CRT_IF

DACs

Controller and

Direct Video/VBI

Controller

GX1 Graphics Data

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