is it a bug in the SDI interface ip?

i use the SDI-INTERFACE IP to generate the HD-SDI signal. i first test the 1080i60 signal. use the SDI monitor to test the signal, i found the line number only encodered into the Cb/Cr's position , the y's position is not encodered the line number , always 10'h200.

the monitor 's data is as following:

SAMPLE Y Cb/Cr

[EAV] <1920> 3FF 3FF

[EAV] <1921> 000 000

[EAV] <1922> 000 000

[EAV] <1923> 2D8 2D8

<1924> 200 204

<1925> 200 200

the line number has not been encodered into the corresponding position.

according to the SMPTE292M 5-2 the line 1924's Y postion should also be 204.

the following is the corresponding code of the SDI signal generator.

The sdi_if module is the SDI INTERFACE interface.

The test_vips module is the video pattern generator ip. I use the signal-tap test the line number(tx_ln) it output is write.

wire [10:0] tx_ln;

test_vips DUT

(

......

.vid_ln_from_the_alt_vip_itc_0 (tx_ln),

//line number output,11 bits.

......

);

sdi_if SDI_IF(

......

.tx_ln({11'b0,tx_ln}),

.....

);