AK8826VN Datasheet, PDF (52/157 Pages) Asahi Kasei Microsystems – HD/SD Multi Format Video Encoder with 3ch DAC

(1) EAV Decode mode
[AK8826VN]
(1 -1 ) EAV Decode
EAV code which is encoded on input data stream is decoded, and the device makes synchronization with its timing. At the time
of 16-bit width data input case, synchronization is made with EAV of the Y7-Y0 data, and it is not reference to the EAV/SAV
which are contained in CbCr7-0 data.
In case of RGB data input mode, AK8826 doesn’t support this interface mode.
EAV/SAV Code
Those codes succeeding 0xFF - 0x00 - 0x00 which are fed as input data become EAV/SAV codes.
EAV/SAV codes have following meanings, started with MSB.
Bit Number
MSB
LSB
WORD VALUE
7
6
5
4
3
2
1
0
0
0xFF
1
1
1
1
1
1
1
1
1
0x00
0
0
0
0
0
0
0
0
2
0x00
0
0
0
0
0
0
0
0
3
0xxx
1
F
V
H
P3
P2
P1
P0
F
= 0 : Field 1
= 1 : Field 2
(F-bit is always 0 in case of Progressive data)
V
= 0 : Field Blanking (V-Blanking) Ҏ֎
= 1: Field Blanking (V-Blanking)
H
= 0: SAV
= 1: EAV
P3, P2, P1, P0: Protection Bit
Following is a relation between Protection bit and F/V/H-bit.
F
V
H
P3
P2
P1
P0
0
0
0
0
0
0
0
0
0
1
1
1
0
1
0
1
0
1
0
1
1
0
1
1
0
1
1
0
1
0
0
0
1
1
1
1
0
1
1
0
1
0
1
1
0
1
1
0
0
1
1
1
0
0
0
1
Reference standards
Input Data
525i
625i
525p
625p
1080i
720p
Reference
ITU-R.BT656
ITU-R.BT656
SMPTE 293M
ITU-R. BT1358
SMPTE 274M
SMPTE 296M
MS0972-E-01
52
2008/12