diff options
Diffstat (limited to 'Documentation/media/uapi/v4l/vidioc-enumstd.rst')
| -rw-r--r-- | Documentation/media/uapi/v4l/vidioc-enumstd.rst | 26 |
1 files changed, 13 insertions, 13 deletions
diff --git a/Documentation/media/uapi/v4l/vidioc-enumstd.rst b/Documentation/media/uapi/v4l/vidioc-enumstd.rst index ce911c81bd3d..6699b26cdeb4 100644 --- a/Documentation/media/uapi/v4l/vidioc-enumstd.rst +++ b/Documentation/media/uapi/v4l/vidioc-enumstd.rst @@ -41,7 +41,7 @@ structure or return an ``EINVAL`` error code when the index is out of bounds. To enumerate all standards applications shall begin at index zero, incrementing by one until the driver returns ``EINVAL``. Drivers may enumerate a different set of standards after switching the video input -or output. [1]_ +or output. [#f1]_ .. _v4l2-standard: @@ -278,11 +278,11 @@ support digital TV. See also the Linux DVB API at - Characteristics - - M/NTSC [2]_ + - M/NTSC [#f2]_ - M/PAL - - N/PAL [3]_ + - N/PAL [#f3]_ - B, B1, G/PAL @@ -369,7 +369,7 @@ support digital TV. See also the Linux DVB API at - + 4.5 - - + 5.5 ± 0.001 [4]_ [5]_ [6]_ [7]_ + - + 5.5 ± 0.001 [#f4]_ [#f5]_ [#f6]_ [#f7]_ - + 6.5 ± 0.001 @@ -383,7 +383,7 @@ support digital TV. See also the Linux DVB API at - + 6.5 - - + 6.5 [8]_ + - + 6.5 [#f8]_ Return Value @@ -400,42 +400,42 @@ EINVAL ENODATA Standard video timings are not supported for this input or output. -.. [1] +.. [#f1] The supported standards may overlap and we need an unambiguous set to find the current standard returned by :ref:`VIDIOC_G_STD <VIDIOC_G_STD>`. -.. [2] +.. [#f2] Japan uses a standard similar to M/NTSC (V4L2_STD_NTSC_M_JP). -.. [3] +.. [#f3] The values in brackets apply to the combination N/PAL a.k.a. N\ :sub:`C` used in Argentina (V4L2_STD_PAL_Nc). -.. [4] +.. [#f4] In the Federal Republic of Germany, Austria, Italy, the Netherlands, Slovakia and Switzerland a system of two sound carriers is used, the frequency of the second carrier being 242.1875 kHz above the frequency of the first sound carrier. For stereophonic sound transmissions a similar system is used in Australia. -.. [5] +.. [#f5] New Zealand uses a sound carrier displaced 5.4996 ± 0.0005 MHz from the vision carrier. -.. [6] +.. [#f6] In Denmark, Finland, New Zealand, Sweden and Spain a system of two sound carriers is used. In Iceland, Norway and Poland the same system is being introduced. The second carrier is 5.85 MHz above the vision carrier and is DQPSK modulated with 728 kbit/s sound and data multiplex. (NICAM system) -.. [7] +.. [#f7] In the United Kingdom, a system of two sound carriers is used. The second sound carrier is 6.552 MHz above the vision carrier and is DQPSK modulated with a 728 kbit/s sound and data multiplex able to carry two sound channels. (NICAM system) -.. [8] +.. [#f8] In France, a digital carrier 5.85 MHz away from the vision carrier may be used in addition to the main sound carrier. It is modulated in differentially encoded QPSK with a 728 kbit/s sound and data |