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AL260

Video Enhancement Processor

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AL260

8 General Function Description

8.1 Function Blocks

AL260 provide a fully programmable structure allowing video stream process more flexible.

The AL260 data process is executed by parsing in the modules such as capture, down

scale, memory, up scale and mixer. In each module, data will be manipulated

corresponding to the setting of registers. Due to the lack of the number of registers, some

registers require banking to other page for access. There are 4 group registers, base

control registers, capture control registers, memory control registers and display control

registers. The value of base register 0eh determines which group of registers is taken

effect. If register 0eh is programmed to value 00, the group of base control registers is

chosen; and the register 0eh with value 01 is for capture register group, value 02 is for

memory register group and value 03 is for display register group. The register 0eh must

be set to corresponding value before that group of register can be accessed.

Register Group ID

Group register Description

Symbol Example

00 Access only base control registers

BAS# BAS#16

01 Access capture and base control registers CAP# CAP#20

0Eh

<1:0>

10 Access memory and base control registers MEM# MEM#32

11 Access display and base control registers

DIS# DIS#61

8.2 VIU (Video Input Unit)

AL260 accepts 16/8bit YUV 4:2:2 (NTSC/PAL) video data stream with ITU-R-656/601

standards. Applying AverLogic Proprietary Scaling algorithm, the video stream can be

scaled down to accommodate required output resolutions with high quality scaling effect.

The high quality scaling engine also ensures full screen output display.

8.2.1 Input Data Format

The AL260 is an integrated video processor that automatically detects and converts

multiple video formats. The Index and Base registers provide user an expansion of the

©2002,2003-Copyright by AverLogic Technologies, Corp.

Version B1.0

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