參數(shù)資料
型號(hào)： SDA9401
廠商： Electronic Theatre Controls, Inc.
英文描述： Scan Rate Converter using Embedded DRAM Technology Units
中文描述： 掃描頻率轉(zhuǎn)換器采用嵌入式DRAM技術(shù)股
文件頁數(shù)： 17/69頁
文件大?。?/td> 1142K
代理商： SDA9401
Micronas
17
Preliminary Data Sheet
SDA 9401
6.3.2
Horizontal compression
The horizontal compression compresses the incoming signal horizontally by a constant factor. For
the Y and UV signal the same filter characteristics are used. The horizontal compression can be
switched off.
The table below shows the relation between the parameter HDECON and the compression factor.
Input write parameter: HDECON
The APPLIP (Active Pixels Per Line Input, see also
chapter Input sync controller (ISC)
on page 9)
value defines the length of an active line. Inside the SDA 9401 the number of active pixels per line is
APPL (Active Pixels Per Line) and its value depends on the chosen horizontal compression factor
HDECON. The table below explains the connection between APPL and APPLIP (see also
chapter
Output sync controller (OSC)
on page 29).
Connection between APPL and APPLIP
HDECON (1Ch)
00
01
10
11
no horizontal compression
factor 2
factor 4
not defined
Mode
APPL
no horizontal compression (HDECON = ’00’)
horizontal compression, Factor 2 (HDECON = ’01’)
horizontal compression, Factor 4 (HDECON = ’10’)
MULTIPIC > ’0’ (dominant, see also
chapter Multipicture display
on
page 18)
APPLIP
(APPLIP + 1) / 2
(APPLIP + 3) / 4
45
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