--- zzzz-none-000/linux-3.10.107/Documentation/DocBook/media/v4l/dev-sliced-vbi.xml 2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/Documentation/DocBook/media/v4l/dev-sliced-vbi.xml 2021-02-04 17:41:59.000000000 +0000
@@ -185,7 +185,14 @@
Drivers must set
service_lines[0][0] and
-service_lines[1][0] to zero.
+service_lines[1][0] to zero.
+The V4L2_VBI_ITU_525_F1_START,
+V4L2_VBI_ITU_525_F2_START,
+V4L2_VBI_ITU_625_F1_START and
+V4L2_VBI_ITU_625_F2_START defines give the start
+line numbers for each field for each 525 or 625 line format as a
+convenience. Don't forget that ITU line numbering starts at 1, not 0.
+
__u32
@@ -247,7 +254,7 @@
V4L2_SLICED_CAPTION_525
0x1000
-
+
NTSC line 21, 284 (second field 21)
Two bytes in transmission order, including parity
bit, lsb first transmitted.