Commit ee072ed7 authored by Mauro Carvalho Chehab's avatar Mauro Carvalho Chehab

[media] DocBook: Improve DVB frontend description

The DVB frontend API got bitrotten. Update it.
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@osg.samsung.com>
parent 0b0f1a00
<title>DVB Frontend API</title> <title>DVB Frontend API</title>
<para>The DVB frontend device controls the tuner and DVB demodulator <para>The DVB frontend API was designed to support three types of delivery systems:</para>
hardware. It can be accessed through <emphasis <itemizedlist>
role="bold">/dev/dvb/adapter0/frontend0</emphasis>. Data types and and <listitem>Terrestrial systems: DVB-T, DVB-T2, ATSC, ATSC M/H, ISDB-T, DVB-H, DTMB, CMMB</listitem>
ioctl definitions can be accessed by including <emphasis <listitem>Cable systems: DVB-C Annex A/C, ClearQAM (DVB-C Annex B), ISDB-C</listitem>
role="bold">linux/dvb/frontend.h</emphasis> in your application.</para> <listitem>Satellital systems: DVB-S, DVB-S2, DVB Turbo, ISDB-S, DSS</listitem>
</itemizedlist>
<para>DVB frontends come in three varieties: DVB-S (satellite), DVB-C <para>The DVB frontend controls several sub-devices including:</para>
(cable) and DVB-T (terrestrial). Transmission via the internet (DVB-IP) <itemizedlist>
is not yet handled by this API but a future extension is possible. For <listitem>Tuner</listitem>,
DVB-S the frontend device also supports satellite equipment control <listitem>Digital TV demodulator</listitem>
(SEC) via DiSEqC and V-SEC protocols. The DiSEqC (digital SEC) <listitem>Low noise amplifier (LNA)</listitem>
specification is available from <listitem>Satellite Equipment Control (SEC) hardware (only for Satellite).</listitem>
<ulink url="http://www.eutelsat.com/satellites/4_5_5.html">Eutelsat</ulink>.</para> </itemizedlist>
<para>The frontend can be accessed through
<emphasis role="bold">/dev/dvb/adapter?/frontend?</emphasis>. Data types and
ioctl definitions can be accessed by including
<emphasis role="bold">linux/dvb/frontend.h</emphasis> in your application.
</para>
<para>Note that the DVB API may also be used for MPEG decoder-only PCI <para>NOTE: Transmission via the internet (DVB-IP)
cards, in which case there exists no frontend device.</para> is not yet handled by this API but a future extension is possible.</para>
<para>On Satellital systems, the API support for the Satellite Equipment Control
(SEC) allows to power control and to send/receive signals to control the
antenna subsystem, selecting the polarization and choosing the Intermediate
Frequency IF) of the Low Noise Block Converter Feed Horn (LNBf). It
supports the DiSEqC and V-SEC protocols. The DiSEqC (digital SEC)
specification is available at
<ulink url="http://www.eutelsat.com/satellites/4_5_5.html">Eutelsat</ulink>.</para>
<section id="frontend_types"> <section id="frontend_types">
<title>Frontend Data Types</title> <title>Frontend Data Types</title>
...@@ -23,8 +35,8 @@ cards, in which case there exists no frontend device.</para> ...@@ -23,8 +35,8 @@ cards, in which case there exists no frontend device.</para>
<section id="fe-type-t"> <section id="fe-type-t">
<title>Frontend type</title> <title>Frontend type</title>
<para>For historical reasons, frontend types are named by the type of modulation used in <para>For historical reasons, frontend types are named by the type of modulation
transmission. The fontend types are given by fe_type_t type, defined as:</para> used in transmission. The fontend types are given by fe_type_t type, defined as:</para>
<table pgwide="1" frame="none" id="fe-type"> <table pgwide="1" frame="none" id="fe-type">
<title>Frontend types</title> <title>Frontend types</title>
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment