AK8857VQ Datasheet, PDF (50/105 Pages) Asahi Kasei Microsystems – Dual Channel Digital Video Decoder

[AK8857VQ]
*1
Input
Video Signal
HD
VBIL=[000]
HACT
DVALID
VACT
VBIL=[001]
HACT
DVALID
VACT
18 19 20 21 22 23 24 25
*2
Input
Video Signal
HD
VBIL=[000]
HACT
DVALID
VACT
VBIL=[001]
HACT
DVALID
VACT
18 19 20 21 22 23 24 25
○SLLVL-bit: Settings for slice level
SLLVL-bit
Slice level
[0]
25IRE
[1]
50IRE
The results of VBI slicing by the AK8857 slicing function are output as ITU-R BT.601 digital data. The
VBI interval is set via VBIL[2:0]-bits. VBI slicing is performed in the luminance signal processing path,
so that the Cb/Cr value of the effective line 601 output code is output at the same level as the
corresponding luminance signal.
The slice level and the output code are set via the register. The output code value is set via the
Hi/Low Slice Data Set Register, as follows.
Hi Slice Data Set Register*: Setting for higher of two values resulting from slicing.
Default: 0xEB(235)
Low Slice Data Set Register*: Setting for lower of two values resulting from slicing.
Default: 0x10(16)
*Note that a setting of 0x00 or 0xFF corresponds to a special 601 code.
MS1189-E-01
-50-
2010/12