I'm trying to extract teletext data using Ancillary Data on ADV7180.
I have a video input from TV Pattern Generator with teletext B.
Video part is working well.
But when I try to get Ancillary Data I got framing code 0xEA but not 0x27 or 0xE4.
I have confirmed that from TV generator framing code is 0xE4.
When I switch to VPS, WSS, data framing code is match.
Why only teletext framing code not 0x27?
Registers I have set for teletext.
reg 0x03 = 0x8C; // VBI_EN
reg 0x0e = 0x20; // access registers. Table 103.
reg 0x62 = 0xB5; // ADF_ENABLE, Byte type
Please advise.