diff options
Diffstat (limited to 'Documentation/DocBook/media/dvb/dvbproperty.xml')
| -rw-r--r-- | Documentation/DocBook/media/dvb/dvbproperty.xml | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/Documentation/DocBook/media/dvb/dvbproperty.xml b/Documentation/DocBook/media/dvb/dvbproperty.xml index 3bc8a61efe30..ffee1fbbc001 100644 --- a/Documentation/DocBook/media/dvb/dvbproperty.xml +++ b/Documentation/DocBook/media/dvb/dvbproperty.xml @@ -334,9 +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, @@ -353,6 +354,7 @@ typedef enum fe_delivery_system { SYS_DAB, SYS_DVBT2, SYS_TURBO, + SYS_DVBC_ANNEX_C, } fe_delivery_system_t; </programlisting> </section> @@ -647,6 +649,18 @@ typedef enum fe_hierarchy { many data types via a single multiplex. The API will soon support this at which point this section will be expanded.</para> </section> + <section id="DTV_ENUM_DELSYS"> + <title><constant>DTV_ENUM_DELSYS</constant></title> + <para>A Multi standard frontend needs to advertise the delivery systems provided. + Applications need to enumerate the provided delivery systems, before using + any other operation with the frontend. Prior to it's introduction, + FE_GET_INFO was used to determine a frontend type. A frontend which + provides more than a single delivery system, FE_GET_INFO doesn't help much. + Applications which intends to use a multistandard frontend must enumerate + the delivery systems associated with it, rather than trying to use + FE_GET_INFO. In the case of a legacy frontend, the result is just the same + as with FE_GET_INFO, but in a more structured format </para> + </section> </section> <section id="frontend-property-terrestrial-systems"> <title>Properties used on terrestrial delivery systems</title> @@ -767,7 +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> |