參數(shù)資料
型號(hào)： SDA9400
廠商： MICRONAS SEMICONDUCTOR HOLDING AG
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)： 35/94頁
文件大?。?/td> 1180K
代理商： SDA9400
SDA 9400
Micronas
35
Preliminary Data Sheet
The COUNTMOV value is used in movie mode and phase detector to generate the MOVMO and
the MOVPH signal. Movie mode means, that the signal source was a movie (24 Hz progressive),
which was translated into a (50 Hz) interlaced signal. Therefore two consecutive fields have the
same motion phase. Normally field An and field Bn belong to the same phase. But it is also possible,
depending on the translation process, that field Bn-1 and field An belong to the same motion phase.
In case of movie mode it is better to switch to an ABAB mode, therefore the information about movie
mode and the movie mode phase is important. This information will be used in the motion detection
block for scan rate conversion to switch the motion values to zero or to frame difference (depends
on the automatic movie mode parameter) or to force the display raster to
～～
in one of the
adaptive operation modes (eg. Field mixer mode). The phase is necessary for the right order of the
fields at the output (
⊥_⊥_
mode or BABA mode) (see also
Operation mode generator
on page 46).
COUNTMOV is the result of the accumulation of the FID3 value during one field. This value can be
used for the detection of the movie mode. If this value is smaller than a given threshold TH
(programmable by the parameter MMTH), both fields may belong to the same phase. The result of
the comparison is stored in CMP (see block diagram of movie mode and phase detection below).
The difference of the COUNTMOV value of the actual field and the COUNTMOV value of the
previous field can be used to switch adaptive the threshold for the movie mode detection. The final
MOVMO as well as the MOVPH value is determined by comparison of the results from the last
2*(MMTC+1) CMP values.
If THYON = 0 (Temporal hysteresis off, I2C bus parameter), the time to switch from camera mode to
movie mode and vice versa is the same: 2*(MMTC+1) fields. If THYON = 1 (Temporal hysteresis
on), the time to switch from camera mode to movie mode differs from the time to switch from movie
mode to camera mode. In case THYON = 1 the time to switch from camera to movie mode is
2*(MMTC+1) fields and the time to switch from movie mode to camera is (MMTC+1). So camera
mode is preferred.
To reset the movie mode detector e.g. after tuner change, the I2C bus parameter RESMOV exists. If
the parameter RESMOV = 1, the MOVMO is set to camera mode (MOVMO=0) and the time
hysteresis queue is reset too. RESMOV = 0 means normal behaviour of the movie mode and movie
phase detection block.
Block diagram of movie mode and phase detection
1
GMOTION(T-1)
last GMAM fields, SHYST were 1
otherwise
GMOTION(T)
MMTHL
COUNTMOV
CMP
DETECTOR
MOVMO
MOVPH
CMP
MMTC THYON AMMON
1
1
XOR
MOVPHINV
RESMOV
g
相關(guān)PDF資料
PDF描述
SDA9410-B13 Display Processor and Scan Rate Converter using Embedded DRAM Technology Units
SDA9415-B13 Display Processor and Scan Rate Converter
SDA9488X Cost-effective Picture-In-Picture ICs
SDA9588X Cost-effective Picture-In-Picture ICs
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SDA9401 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Scan Rate Converter using Embedded DRAM Technology Units
SDA9410-B13 制造商:MICRONAS 制造商全稱:MICRONAS 功能描述:Display Processor and Scan Rate Converter using Embedded DRAM Technology Units
SDA9415-B13 制造商:MICRONAS 制造商全稱:MICRONAS 功能描述:Display Processor and Scan Rate Converter
SDA9488X 制造商:MICRONAS 制造商全稱:MICRONAS 功能描述:Cost-effective Picture-In-Picture ICs
SDA9489X 制造商:未知廠家 制造商全稱:未知廠家 功能描述:PIP IV Advanced SOPHISTICUS High-End Picture-In-Picture ICs
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