is it a bug in the SDI interface ip?

[Altera_Forum]

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}), ..... );

[Altera_Forum]

today i changed the code,modified the SDI_IF as following: 

 sdi_if SDI_IF( ...... .tx_ln({tx_ln,tx_ln}), ..... );   then the problem was solved, the line number inserted into the right position.   but the SDI MegaCore Function User Guide v9.0 page 3-27 said tx_ln signal when HD-SDI: bits 21:11 11'd0;bits10:0 LN. I suggest Altera should change this line to HD-SDI: bits 21:11 LN;bits10:0 LN.   other defination i am testing .......