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[media] Update documentation to reflect DVB-C Annex A/C support

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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>
This commit is contained in:
Mauro Carvalho Chehab 2011-12-17 20:36:56 -03:00
parent bf3b84006e
commit 669a4ba44d
2 changed files with 7 additions and 8 deletions
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11
Documentation/DocBook/media/dvb/dvbproperty.xml
View file

@ -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>

4
Documentation/DocBook/media/dvb/frontend.xml
View file

@ -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>