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(yè)數(shù)： 27/94頁(yè)
文件大小： 1180K
代理商： SDA9400
SDA 9400
Micronas
27
Preliminary Data Sheet
Parameter TNRCLY
Input write parameter
6.3.5
Noise measurement
The noise measurement algorithm can be used to change the parameters of the temporal noise
reduction processing depending on the actual noise level of the input signal. This is done by the I2C-
bus controller which reads the NOISEME value, and sends depending on this value different
parameter sets to the temporal noise reduction registers of the SDA 9400. The NOISEME value can
be interpreted as a linear curve from no noise (0) to strong noise (30). Value 31 indicates an
overflow status and can be handled in different ways: strong noise or measurement failed.
Two measurement algorithms are included, which can be chosen by the parameter NMALG. In case
NMALG=1 the noise is measured during the vertical blanking period in the line defined by NMLINE.
For NMALG=0 the noise is measured during the first active line. In both cases the value is
determined by averaging over several fields.
The figure below shows an example for the noise measurement. The NMLINE parameter
determines the line, which is used in the SDA 9400 for the measurement. In case of VINDEL=0 and
NMLINE=0 line 3 of the field A and line 316 of the field B is chosen. In case of VINDEL=0 and
NMLINE=3 line 6 of the field A and line 319 of the field B is chosen.
Parameter
0 (minimum value)
15 (maximum value)
TNRCLY/C
maximum sensitivity for motion
-> strong noise reduction
minimum sensitivity for motion
-> weak noise reduction
Parameter
Subaddress
Description
TNRSEL
1: separate
0: luminance
motion detector
DTNRON
1: frame
0: field
TNRFIY/C
1: off
0: on
TNRVAY/C
1Dh
Switch for motion detection of temporal noise reduction
of chrominance signal
1Dh
Delay for temporal noise reduction of luminance signal
21h/22h
Switch for fixed K-factor value defined by TNRVAY/C
20h
Fixed K-factor for temporal noise reduction of lumi-
nance/chrominance
Horizontal shift of the motion detector characteristic
Vertical shift of the motion detector characteristic
Classification of temporal noise reduction
TNRHOY/C
TNRKOY/C
TNRCLY/C
21h/22h
1Fh
1Eh
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