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authorMauro Carvalho Chehab <mchehab@redhat.com>2011-12-17 20:36:56 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2011-12-20 11:50:08 -0200
commit669a4ba44d6054f147ef123b0c9a640e49c518e0 (patch)
tree14c9842f1c0e60459141f0a8b71d71be54ce3e14 /Documentation
parentbf3b84006e22ae241ec3d53dbe6c6d1f6ceddb56 (diff)
downloadop-kernel-dev-669a4ba44d6054f147ef123b0c9a640e49c518e0.zip
op-kernel-dev-669a4ba44d6054f147ef123b0c9a640e49c518e0.tar.gz
[media] Update documentation to reflect DVB-C Annex A/C support
Instead of using the same delivery system for both Annex A and Annex C, split them into two separate ones. This helps to support devices that only support Annex A. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/DocBook/media/dvb/dvbproperty.xml11
-rw-r--r--Documentation/DocBook/media/dvb/frontend.xml4
2 files changed, 7 insertions, 8 deletions
diff --git a/Documentation/DocBook/media/dvb/dvbproperty.xml b/Documentation/DocBook/media/dvb/dvbproperty.xml
index b812e31..ffee1fb 100644
--- a/Documentation/DocBook/media/dvb/dvbproperty.xml
+++ b/Documentation/DocBook/media/dvb/dvbproperty.xml
@@ -311,8 +311,6 @@ typedef enum fe_rolloff {
ROLLOFF_20,
ROLLOFF_25,
ROLLOFF_AUTO,
- ROLLOFF_15, /* DVB-C Annex A */
- ROLLOFF_13, /* DVB-C Annex C */
} fe_rolloff_t;
</programlisting>
</section>
@@ -336,9 +334,10 @@ typedef enum fe_rolloff {
<title>fe_delivery_system type</title>
<para>Possible values: </para>
<programlisting>
+
typedef enum fe_delivery_system {
SYS_UNDEFINED,
- SYS_DVBC_ANNEX_AC,
+ SYS_DVBC_ANNEX_A,
SYS_DVBC_ANNEX_B,
SYS_DVBT,
SYS_DSS,
@@ -355,6 +354,7 @@ typedef enum fe_delivery_system {
SYS_DAB,
SYS_DVBT2,
SYS_TURBO,
+ SYS_DVBC_ANNEX_C,
} fe_delivery_system_t;
</programlisting>
</section>
@@ -781,7 +781,8 @@ typedef enum fe_hierarchy {
<title>Properties used on cable delivery systems</title>
<section id="dvbc-params">
<title>DVB-C delivery system</title>
- <para>The DVB-C Annex-A/C is the widely used cable standard. Transmission uses QAM modulation.</para>
+ <para>The DVB-C Annex-A is the widely used cable standard. Transmission uses QAM modulation.</para>
+ <para>The DVB-C Annex-C is optimized for 6MHz, and is used in Japan. It supports a subset of the Annex A modulation types, and a roll-off of 0.13, instead of 0.15</para>
<para>The following parameters are valid for DVB-C Annex A/C:</para>
<itemizedlist mark='opencircle'>
<listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem>
@@ -792,10 +793,8 @@ typedef enum fe_hierarchy {
<listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem>
<listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem>
<listitem><para><link linkend="DTV-SYMBOL-RATE"><constant>DTV_SYMBOL_RATE</constant></link></para></listitem>
- <listitem><para><link linkend="DTV-ROLLOFF"><constant>DTV_ROLLOFF</constant></link></para></listitem>
<listitem><para><link linkend="DTV-INNER-FEC"><constant>DTV_INNER_FEC</constant></link></para></listitem>
</itemizedlist>
- <para>The Rolloff of 0.15 (ROLLOFF_15) is assumed, as ITU-T J.83 Annex A is more common. For Annex C, rolloff should be 0.13 (ROLLOFF_13). All other values are invalid.</para>
</section>
<section id="dvbc-annex-b-params">
<title>DVB-C Annex B delivery system</title>
diff --git a/Documentation/DocBook/media/dvb/frontend.xml b/Documentation/DocBook/media/dvb/frontend.xml
index 61407ea..28d7ea5 100644
--- a/Documentation/DocBook/media/dvb/frontend.xml
+++ b/Documentation/DocBook/media/dvb/frontend.xml
@@ -45,8 +45,8 @@ transmission. The fontend types are given by fe_type_t type, defined as:</para>
</row>
<row>
<entry id="FE_QAM"><constant>FE_QAM</constant></entry>
- <entry>For DVB-C annex A/C standard</entry>
- <entry><constant>SYS_DVBC_ANNEX_AC</constant></entry>
+ <entry>For DVB-C annex A standard</entry>
+ <entry><constant>SYS_DVBC_ANNEX_A</constant></entry>
</row>
<row>
<entry id="FE_OFDM"><constant>FE_OFDM</constant></entry>
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