diff options
| author | Mauro Carvalho Chehab <mchehab@redhat.com> | 2011-12-17 20:36:56 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2011-12-20 11:50:08 -0200 |
| commit | 669a4ba44d6054f147ef123b0c9a640e49c518e0 (patch) | |
| tree | 14c9842f1c0e60459141f0a8b71d71be54ce3e14 /Documentation/DocBook/media/dvb | |
| parent | bf3b84006e22ae241ec3d53dbe6c6d1f6ceddb56 (diff) | |
[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/DocBook/media/dvb')
| -rw-r--r-- | Documentation/DocBook/media/dvb/dvbproperty.xml | 11 | ||||
| -rw-r--r-- | Documentation/DocBook/media/dvb/frontend.xml | 4 |
2 files changed, 7 insertions, 8 deletions
diff --git a/Documentation/DocBook/media/dvb/dvbproperty.xml b/Documentation/DocBook/media/dvb/dvbproperty.xml index b812e3140fc..ffee1fbbc00 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 61407eaba02..28d7ea5d5e7 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> |