AK8858 Datasheet, PDF (57/96 Pages) Asahi Kasei Microsystems – PS/SD Multi Format Video Decoder

[AK8858]
[7.29.6] Luminance bandwidth adjustment
Luminance bandwidth adjustment can be performed for MPEG compression etc. The band-limiting filters for
pre-compression limiting can be selected by the following register settings. Without these filters, the frequency
response of the luminance signal is determined by the decimation filter.
Settings for luminance bandwidth filter
LUMFIL [1:0]-bit
Filter characteristic
00
No filter
No bandwidth limit
01
Narrow
10
Mid
11
Wide
Sub Address: 0x14 [5:4]
Notes
Decimation filter characteristic
-3dB at 6.29MHz
-3dB at 2.94MHz
-3dB at 3.30MHz
-3dB at 4.00MHz
Luminance signal decimation filter
Luminance bandwidth filter
For 525/626p input signal, the bandwidth for each filter characteristic is expands about 2 times.
[7.29.7] Sepia output
Sepia-colored output of the decoded signal can be obtained by the following register setting.
Settings for sepia output of decoded signal
SEPIA –bit
Output
[0]
Normal output
[1]
Sepia output
Sub Address: 0x14 [6]
Notes
MS1230-E-00
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2010/9