[media] DocBook/dvbproperty.xml: Reorganize the parameters
Mauro Carvalho Chehab [Tue, 7 Jun 2011 23:05:13 +0000 (20:05 -0300)]
Put the parameters at the sequencial order as they appear inside
the frontend.h header.

TODO: fix the per-standard section, to reflect the parameters
that should actually be used for each transmission system type.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

Documentation/DocBook/media/dvb/dvbproperty.xml

index 01f3933..d8a6424 100644 (file)
@@ -197,8 +197,8 @@ get/set up to 64 properties. The actual meaning of each property is described on
 <para><link linkend="DTV-DVBT2-PLP-ID">DTV_DVBT2_PLP_ID</link></para>
 </section>
 
-<section id="fe_property_common">
-       <title>Parameters that are common to all Digital TV standards</title>
+<section id="fe_property_parameters">
+       <title>Digital TV property parameters</title>
        <section id="DTV-UNDEFINED">
        <title><constant>DTV_UNDEFINED</constant></title>
        <para>Used internally. A GET/SET operation for it won't change or return anything.</para>
@@ -211,6 +211,20 @@ get/set up to 64 properties. The actual meaning of each property is described on
        <title><constant>DTV_CLEAR</constant></title>
        <para>Reset a cache of data specific to the frontend here. This does not effect hardware.</para>
        </section>
+       <section id="DTV-FREQUENCY">
+               <title><constant>DTV_FREQUENCY</constant></title>
+
+               <para>Central frequency of the channel, in HZ.</para>
+
+               <para>Notes:</para>
+               <para>1)For ISDB-T, the channels are usually transmitted with an offset of 143kHz.
+                       E.g. a valid frequncy could be 474143 kHz. The stepping is bound to the bandwidth of
+                       the channel which is 6MHz.</para>
+
+               <para>2)As in ISDB-Tsb the channel consists of only one or three segments the
+                       frequency step is 429kHz, 3*429 respectively. As for ISDB-T the
+                       central frequency of the channel is expected.</para>
+       </section>
        <section id="DTV-MODULATION">
        <title><constant>DTV_MODULATION</constant></title>
 <para>Specifies the frontend modulation type for cable and satellite types. The modulation can be one of the types bellow:</para>
@@ -232,6 +246,32 @@ get/set up to 64 properties. The actual meaning of each property is described on
  } fe_modulation_t;
 </programlisting>
        </section>
+       <section id="DTV-BANDWIDTH-HZ">
+               <title><constant>DTV_BANDWIDTH_HZ</constant></title>
+
+               <para>Bandwidth for the channel, in HZ.</para>
+
+               <para>Possible values:
+                       <constant>1712000</constant>,
+                       <constant>5000000</constant>,
+                       <constant>6000000</constant>,
+                       <constant>7000000</constant>,
+                       <constant>8000000</constant>,
+                       <constant>10000000</constant>.
+               </para>
+
+               <para>Notes:</para>
+
+               <para>1) For ISDB-T it should be always 6000000Hz (6MHz)</para>
+               <para>2) For ISDB-Tsb it can vary depending on the number of connected segments</para>
+               <para>3) Bandwidth doesn't apply for DVB-C transmissions, as the bandwidth
+                        for DVB-C depends on the symbol rate</para>
+               <para>4) Bandwidth in ISDB-T is fixed (6MHz) or can be easily derived from
+                       other parameters (DTV_ISDBT_SB_SEGMENT_IDX,
+                       DTV_ISDBT_SB_SEGMENT_COUNT).</para>
+               <para>5) DVB-T supports 6, 7 and 8MHz.</para>
+               <para>6) In addition, DVB-T2 supports 1.172, 5 and 10MHz.</para>
+       </section>
        <section id="DTV-INVERSION">
        <title><constant>DTV_INVERSION</constant></title>
        <para>The Inversion field can take one of these values:
@@ -338,6 +378,205 @@ typedef enum fe_rolloff {
        <title><constant>DTV_FE_CAPABILITY</constant></title>
        <para>Currently not implemented.</para>
        </section>
+       <section id="DTV-DELIVERY-SYSTEM">
+               <title><constant>DTV_DELIVERY_SYSTEM</constant></title>
+               <para>Specifies the type of Delivery system</para>
+               <section id="fe-delivery-system-t">
+               <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_B,
+       SYS_DVBT,
+       SYS_DSS,
+       SYS_DVBS,
+       SYS_DVBS2,
+       SYS_DVBH,
+       SYS_ISDBT,
+       SYS_ISDBS,
+       SYS_ISDBC,
+       SYS_ATSC,
+       SYS_ATSCMH,
+       SYS_DMBTH,
+       SYS_CMMB,
+       SYS_DAB,
+       SYS_DVBT2,
+} fe_delivery_system_t;
+</programlisting>
+               </section>
+       </section>
+       <section id="DTV-ISDBT-PARTIAL-RECEPTION">
+               <title><constant>DTV_ISDBT_PARTIAL_RECEPTION</constant></title>
+
+               <para>If <constant>DTV_ISDBT_SOUND_BROADCASTING</constant> is '0' this bit-field represents whether
+                       the channel is in partial reception mode or not.</para>
+
+               <para>If '1' <constant>DTV_ISDBT_LAYERA_*</constant> values are assigned to the center segment and
+                       <constant>DTV_ISDBT_LAYERA_SEGMENT_COUNT</constant> has to be '1'.</para>
+
+               <para>If in addition <constant>DTV_ISDBT_SOUND_BROADCASTING</constant> is '1'
+                       <constant>DTV_ISDBT_PARTIAL_RECEPTION</constant> represents whether this ISDB-Tsb channel
+                       is consisting of one segment and layer or three segments and two layers.</para>
+
+               <para>Possible values: 0, 1, -1 (AUTO)</para>
+       </section>
+       <section id="DTV-ISDBT-SOUND-BROADCASTING">
+               <title><constant>DTV_ISDBT_SOUND_BROADCASTING</constant></title>
+
+               <para>This field represents whether the other DTV_ISDBT_*-parameters are
+                       referring to an ISDB-T and an ISDB-Tsb channel. (See also
+                       <constant>DTV_ISDBT_PARTIAL_RECEPTION</constant>).</para>
+
+               <para>Possible values: 0, 1, -1 (AUTO)</para>
+       </section>
+       <section id="DTV-ISDBT-SB-SUBCHANNEL-ID">
+               <title><constant>DTV_ISDBT_SB_SUBCHANNEL_ID</constant></title>
+
+               <para>This field only applies if <constant>DTV_ISDBT_SOUND_BROADCASTING</constant> is '1'.</para>
+
+               <para>(Note of the author: This might not be the correct description of the
+                       <constant>SUBCHANNEL-ID</constant> in all details, but it is my understanding of the technical
+                       background needed to program a device)</para>
+
+               <para>An ISDB-Tsb channel (1 or 3 segments) can be broadcasted alone or in a
+                       set of connected ISDB-Tsb channels. In this set of channels every
+                       channel can be received independently. The number of connected
+                       ISDB-Tsb segment can vary, e.g. depending on the frequency spectrum
+                       bandwidth available.</para>
+
+               <para>Example: Assume 8 ISDB-Tsb connected segments are broadcasted. The
+                       broadcaster has several possibilities to put those channels in the
+                       air: Assuming a normal 13-segment ISDB-T spectrum he can align the 8
+                       segments from position 1-8 to 5-13 or anything in between.</para>
+
+               <para>The underlying layer of segments are subchannels: each segment is
+                       consisting of several subchannels with a predefined IDs. A sub-channel
+                       is used to help the demodulator to synchronize on the channel.</para>
+
+               <para>An ISDB-T channel is always centered over all sub-channels. As for
+                       the example above, in ISDB-Tsb it is no longer as simple as that.</para>
+
+               <para><constant>The DTV_ISDBT_SB_SUBCHANNEL_ID</constant> parameter is used to give the
+                       sub-channel ID of the segment to be demodulated.</para>
+
+               <para>Possible values: 0 .. 41, -1 (AUTO)</para>
+       </section>
+       <section id="DTV-ISDBT-SB-SEGMENT-IDX">
+               <title><constant>DTV_ISDBT_SB_SEGMENT_IDX</constant></title>
+               <para>This field only applies if <constant>DTV_ISDBT_SOUND_BROADCASTING</constant> is '1'.</para>
+               <para><constant>DTV_ISDBT_SB_SEGMENT_IDX</constant> gives the index of the segment to be
+                       demodulated for an ISDB-Tsb channel where several of them are
+                       transmitted in the connected manner.</para>
+               <para>Possible values: 0 .. <constant>DTV_ISDBT_SB_SEGMENT_COUNT</constant> - 1</para>
+               <para>Note: This value cannot be determined by an automatic channel search.</para>
+       </section>
+       <section id="DTV-ISDBT-SB-SEGMENT-COUNT">
+               <title><constant>DTV_ISDBT_SB_SEGMENT_COUNT</constant></title>
+               <para>This field only applies if <constant>DTV_ISDBT_SOUND_BROADCASTING</constant> is '1'.</para>
+               <para><constant>DTV_ISDBT_SB_SEGMENT_COUNT</constant> gives the total count of connected ISDB-Tsb
+                       channels.</para>
+               <para>Possible values: 1 .. 13</para>
+               <para>Note: This value cannot be determined by an automatic channel search.</para>
+       </section>
+       <section id="isdb-hierq-layers">
+               <title>Hierarchical layers</title>
+               <para>ISDB-T channels can be coded hierarchically. As opposed to DVB-T in
+                       ISDB-T hierarchical layers can be decoded simultaneously. For that
+                       reason a ISDB-T demodulator has 3 viterbi and 3 reed-solomon-decoders.</para>
+               <para>ISDB-T has 3 hierarchical layers which each can use a part of the
+                       available segments. The total number of segments over all layers has
+                       to 13 in ISDB-T.</para>
+               <section id="DTV-ISDBT-LAYER-ENABLED">
+                       <title><constant>DTV_ISDBT_LAYER_ENABLED</constant></title>
+                       <para>Hierarchical reception in ISDB-T is achieved by enabling or disabling
+                               layers in the decoding process. Setting all bits of
+                               <constant>DTV_ISDBT_LAYER_ENABLED</constant> to '1' forces all layers (if applicable) to be
+                               demodulated. This is the default.</para>
+                       <para>If the channel is in the partial reception mode
+                               (<constant>DTV_ISDBT_PARTIAL_RECEPTION</constant> = 1) the central segment can be decoded
+                               independently of the other 12 segments. In that mode layer A has to
+                               have a <constant>SEGMENT_COUNT</constant> of 1.</para>
+                       <para>In ISDB-Tsb only layer A is used, it can be 1 or 3 in ISDB-Tsb
+                               according to <constant>DTV_ISDBT_PARTIAL_RECEPTION</constant>. <constant>SEGMENT_COUNT</constant> must be filled
+                               accordingly.</para>
+                       <para>Possible values: 0x1, 0x2, 0x4 (|-able)</para>
+                       <para><constant>DTV_ISDBT_LAYER_ENABLED[0:0]</constant> - layer A</para>
+                       <para><constant>DTV_ISDBT_LAYER_ENABLED[1:1]</constant> - layer B</para>
+                       <para><constant>DTV_ISDBT_LAYER_ENABLED[2:2]</constant> - layer C</para>
+                       <para><constant>DTV_ISDBT_LAYER_ENABLED[31:3]</constant> unused</para>
+               </section>
+               <section id="DTV-ISDBT-LAYER-FEC">
+                       <title><constant>DTV_ISDBT_LAYER*_FEC</constant></title>
+                       <para>Possible values: <constant>FEC_AUTO</constant>, <constant>FEC_1_2</constant>, <constant>FEC_2_3</constant>, <constant>FEC_3_4</constant>, <constant>FEC_5_6</constant>, <constant>FEC_7_8</constant></para>
+               </section>
+               <section id="DTV-ISDBT-LAYER-MODULATION">
+                       <title><constant>DTV_ISDBT_LAYER*_MODULATION</constant></title>
+                       <para>Possible values: <constant>QAM_AUTO</constant>, QP<constant>SK, QAM_16</constant>, <constant>QAM_64</constant>, <constant>DQPSK</constant></para>
+                       <para>Note: If layer C is <constant>DQPSK</constant> layer B has to be <constant>DQPSK</constant>. If layer B is <constant>DQPSK</constant>
+                               and <constant>DTV_ISDBT_PARTIAL_RECEPTION</constant>=0 layer has to be <constant>DQPSK</constant>.</para>
+               </section>
+               <section id="DTV-ISDBT-LAYER-SEGMENT-COUNT">
+                       <title><constant>DTV_ISDBT_LAYER*_SEGMENT_COUNT</constant></title>
+                       <para>Possible values: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, -1 (AUTO)</para>
+                       <para>Note: Truth table for <constant>DTV_ISDBT_SOUND_BROADCASTING</constant> and
+                               <constant>DTV_ISDBT_PARTIAL_RECEPTION</constant> and <constant>LAYER</constant>*_SEGMENT_COUNT</para>
+                       <informaltable id="isdbt-layer_seg-cnt-table">
+                               <tgroup cols="6">
+                                       <tbody>
+                                               <row>
+                                                       <entry>PR</entry>
+                                                       <entry>SB</entry>
+                                                       <entry>Layer A width</entry>
+                                                       <entry>Layer B width</entry>
+                                                       <entry>Layer C width</entry>
+                                                       <entry>total width</entry>
+                                               </row>
+                                               <row>
+                                                       <entry>0</entry>
+                                                       <entry>0</entry>
+                                                       <entry>1 .. 13</entry>
+                                                       <entry>1 .. 13</entry>
+                                                       <entry>1 .. 13</entry>
+                                                       <entry>13</entry>
+                                               </row>
+                                               <row>
+                                                       <entry>1</entry>
+                                                       <entry>0</entry>
+                                                       <entry>1</entry>
+                                                       <entry>1 .. 13</entry>
+                                                       <entry>1 .. 13</entry>
+                                                       <entry>13</entry>
+                                               </row>
+                                               <row>
+                                                       <entry>0</entry>
+                                                       <entry>1</entry>
+                                                       <entry>1</entry>
+                                                       <entry>0</entry>
+                                                       <entry>0</entry>
+                                                       <entry>1</entry>
+                                               </row>
+                                               <row>
+                                                       <entry>1</entry>
+                                                       <entry>1</entry>
+                                                       <entry>1</entry>
+                                                       <entry>2</entry>
+                                                       <entry>0</entry>
+                                                       <entry>13</entry>
+                                               </row>
+                                       </tbody>
+                               </tgroup>
+                       </informaltable>
+               </section>
+               <section id="DTV-ISDBT-LAYER-TIME-INTERLEAVING">
+                       <title><constant>DTV_ISDBT_LAYER*_TIME_INTERLEAVING</constant></title>
+                       <para>Possible values: 0, 1, 2, 3, -1 (AUTO)</para>
+                       <para>Note: The real inter-leaver depth-names depend on the mode (fft-size); the values
+                               here are referring to what can be found in the TMCC-structure -
+                               independent of the mode.</para>
+               </section>
+       </section>
        <section id="DTV-API-VERSION">
        <title><constant>DTV_API_VERSION</constant></title>
        <para>Returns the major/minor version of the DVB API</para>
@@ -384,95 +623,29 @@ typedef enum fe_code_rate {
 } fe_code_rate_t;
        </programlisting>
        </section>
-       <section id="DTV-HIERARCHY">
-       <title><constant>DTV_HIERARCHY</constant></title>
-       <para>Frontend hierarchy</para>
-       <programlisting>
-typedef enum fe_hierarchy {
-        HIERARCHY_NONE,
-        HIERARCHY_1,
-        HIERARCHY_2,
-        HIERARCHY_4,
-        HIERARCHY_AUTO
- } fe_hierarchy_t;
-       </programlisting>
-       </section>
-       <section id="DTV-ISDBS-TS-ID">
-       <title><constant>DTV_ISDBS_TS_ID</constant></title>
-       <para>Currently unused.</para>
-       </section>
-       <section id="DTV-FREQUENCY">
-               <title><constant>DTV_FREQUENCY</constant></title>
-
-               <para>Central frequency of the channel, in HZ.</para>
-
-               <para>Notes:</para>
-               <para>1)For ISDB-T, the channels are usually transmitted with an offset of 143kHz.
-                       E.g. a valid frequncy could be 474143 kHz. The stepping is bound to the bandwidth of
-                       the channel which is 6MHz.</para>
-
-               <para>2)As in ISDB-Tsb the channel consists of only one or three segments the
-                       frequency step is 429kHz, 3*429 respectively. As for ISDB-T the
-                       central frequency of the channel is expected.</para>
-       </section>
-
-       <section id="DTV-BANDWIDTH-HZ">
-               <title><constant>DTV_BANDWIDTH_HZ</constant></title>
-
-               <para>Bandwidth for the channel, in HZ.</para>
-
-               <para>Possible values:
-                       <constant>1712000</constant>,
-                       <constant>5000000</constant>,
-                       <constant>6000000</constant>,
-                       <constant>7000000</constant>,
-                       <constant>8000000</constant>,
-                       <constant>10000000</constant>.
-               </para>
-
-               <para>Notes:</para>
-
-               <para>1) For ISDB-T it should be always 6000000Hz (6MHz)</para>
-               <para>2) For ISDB-Tsb it can vary depending on the number of connected segments</para>
-               <para>3) Bandwidth doesn't apply for DVB-C transmissions, as the bandwidth
-                        for DVB-C depends on the symbol rate</para>
-               <para>4) Bandwidth in ISDB-T is fixed (6MHz) or can be easily derived from
-                       other parameters (DTV_ISDBT_SB_SEGMENT_IDX,
-                       DTV_ISDBT_SB_SEGMENT_COUNT).</para>
-               <para>5) DVB-T supports 6, 7 and 8MHz.</para>
-               <para>6) In addition, DVB-T2 supports 1.172, 5 and 10MHz.</para>
-       </section>
-
-       <section id="DTV-DELIVERY-SYSTEM">
-               <title><constant>DTV_DELIVERY_SYSTEM</constant></title>
-
-               <para>Specifies the type of Delivery system</para>
+       <section id="DTV-GUARD-INTERVAL">
+               <title><constant>DTV_GUARD_INTERVAL</constant></title>
 
-               <para>Possible values: </para>
+               <para>Possible values are:</para>
 <programlisting>
-typedef enum fe_delivery_system {
-       SYS_UNDEFINED,
-       SYS_DVBC_ANNEX_AC,
-       SYS_DVBC_ANNEX_B,
-       SYS_DVBT,
-       SYS_DSS,
-       SYS_DVBS,
-       SYS_DVBS2,
-       SYS_DVBH,
-       SYS_ISDBT,
-       SYS_ISDBS,
-       SYS_ISDBC,
-       SYS_ATSC,
-       SYS_ATSCMH,
-       SYS_DMBTH,
-       SYS_CMMB,
-       SYS_DAB,
-       SYS_DVBT2,
-} fe_delivery_system_t;
+typedef enum fe_guard_interval {
+       GUARD_INTERVAL_1_32,
+       GUARD_INTERVAL_1_16,
+       GUARD_INTERVAL_1_8,
+       GUARD_INTERVAL_1_4,
+       GUARD_INTERVAL_AUTO,
+       GUARD_INTERVAL_1_128,
+       GUARD_INTERVAL_19_128,
+       GUARD_INTERVAL_19_256,
+} fe_guard_interval_t;
 </programlisting>
 
+               <para>Notes:</para>
+               <para>1) If <constant>DTV_GUARD_INTERVAL</constant> is set the <constant>GUARD_INTERVAL_AUTO</constant> the hardware will
+                       try to find the correct guard interval (if capable) and will use TMCC to fill
+                       in the missing parameters.</para>
+               <para>2) Intervals 1/128, 19/128 and 19/256 are used only for DVB-T2 at present</para>
        </section>
-
        <section id="DTV-TRANSMISSION-MODE">
                <title><constant>DTV_TRANSMISSION_MODE</constant></title>
 
@@ -490,7 +663,6 @@ typedef enum fe_transmit_mode {
        TRANSMISSION_MODE_32K,
 } fe_transmit_mode_t;
 </programlisting>
-
                <para>Notes:</para>
                <para>1) ISDB-T supports three carrier/symbol-size: 8K, 4K, 2K. It is called
                        'mode' in the standard: Mode 1 is 2K, mode 2 is 4K, mode 3 is 8K</para>
@@ -501,291 +673,60 @@ typedef enum fe_transmit_mode {
                <para>3) DVB-T specifies 2K and 8K as valid sizes.</para>
                <para>4) DVB-T2 specifies 1K, 2K, 4K, 8K, 16K and 32K.</para>
        </section>
-
-       <section id="DTV-GUARD-INTERVAL">
-               <title><constant>DTV_GUARD_INTERVAL</constant></title>
-
-               <para>Possible values are:</para>
-<programlisting>
-typedef enum fe_guard_interval {
-       GUARD_INTERVAL_1_32,
-       GUARD_INTERVAL_1_16,
-       GUARD_INTERVAL_1_8,
-       GUARD_INTERVAL_1_4,
-       GUARD_INTERVAL_AUTO,
-       GUARD_INTERVAL_1_128,
-       GUARD_INTERVAL_19_128,
-       GUARD_INTERVAL_19_256,
-} fe_guard_interval_t;
-</programlisting>
-
-               <para>Notes:</para>
-               <para>1) If <constant>DTV_GUARD_INTERVAL</constant> is set the <constant>GUARD_INTERVAL_AUTO</constant> the hardware will
-                       try to find the correct guard interval (if capable) and will use TMCC to fill
-                       in the missing parameters.</para>
-               <para>2) Intervals 1/128, 19/128 and 19/256 are used only for DVB-T2 at present</para>
+       <section id="DTV-HIERARCHY">
+       <title><constant>DTV_HIERARCHY</constant></title>
+       <para>Frontend hierarchy</para>
+       <programlisting>
+typedef enum fe_hierarchy {
+        HIERARCHY_NONE,
+        HIERARCHY_1,
+        HIERARCHY_2,
+        HIERARCHY_4,
+        HIERARCHY_AUTO
+ } fe_hierarchy_t;
+       </programlisting>
        </section>
-</section>
-
-<section id="isdbt">
-       <title>ISDB-T frontend</title>
-       <para>This section describes shortly what are the possible parameters in the Linux
-               DVB-API called "S2API" and now DVB API 5 in order to tune an ISDB-T/ISDB-Tsb
-               demodulator:</para>
-
-       <para>This ISDB-T/ISDB-Tsb API extension should reflect all information
-               needed to tune any ISDB-T/ISDB-Tsb hardware. Of course it is possible
-               that some very sophisticated devices won't need certain parameters to
-               tune.</para>
-
-       <para>The information given here should help application writers to know how
-               to handle ISDB-T and ISDB-Tsb hardware using the Linux DVB-API.</para>
-
-       <para>The details given here about ISDB-T and ISDB-Tsb are just enough to
-               basically show the dependencies between the needed parameter values,
-               but surely some information is left out. For more detailed information
-               see the following documents:</para>
-
-       <para>ARIB STD-B31 - "Transmission System for Digital Terrestrial
-               Television Broadcasting" and</para>
-       <para>ARIB TR-B14 - "Operational Guidelines for Digital Terrestrial
-               Television Broadcasting".</para>
-
-       <para>In order to read this document one has to have some knowledge the
-               channel structure in ISDB-T and ISDB-Tsb. I.e. it has to be known to
-               the reader that an ISDB-T channel consists of 13 segments, that it can
-               have up to 3 layer sharing those segments, and things like that.</para>
-
-       <para>Parameters used by ISDB-T and ISDB-Tsb.</para>
-
-       <section id="isdbt-new-parms">
-               <title>ISDB-T only parameters</title>
-
-               <section id="DTV-ISDBT-PARTIAL-RECEPTION">
-                       <title><constant>DTV_ISDBT_PARTIAL_RECEPTION</constant></title>
-
-                       <para>If <constant>DTV_ISDBT_SOUND_BROADCASTING</constant> is '0' this bit-field represents whether
-                               the channel is in partial reception mode or not.</para>
-
-                       <para>If '1' <constant>DTV_ISDBT_LAYERA_*</constant> values are assigned to the center segment and
-                               <constant>DTV_ISDBT_LAYERA_SEGMENT_COUNT</constant> has to be '1'.</para>
-
-                       <para>If in addition <constant>DTV_ISDBT_SOUND_BROADCASTING</constant> is '1'
-                               <constant>DTV_ISDBT_PARTIAL_RECEPTION</constant> represents whether this ISDB-Tsb channel
-                               is consisting of one segment and layer or three segments and two layers.</para>
-
-                       <para>Possible values: 0, 1, -1 (AUTO)</para>
-               </section>
-
-               <section id="DTV-ISDBT-SOUND-BROADCASTING">
-                       <title><constant>DTV_ISDBT_SOUND_BROADCASTING</constant></title>
-
-                       <para>This field represents whether the other DTV_ISDBT_*-parameters are
-                               referring to an ISDB-T and an ISDB-Tsb channel. (See also
-                               <constant>DTV_ISDBT_PARTIAL_RECEPTION</constant>).</para>
-
-                       <para>Possible values: 0, 1, -1 (AUTO)</para>
-               </section>
-
-               <section id="DTV-ISDBT-SB-SUBCHANNEL-ID">
-                       <title><constant>DTV_ISDBT_SB_SUBCHANNEL_ID</constant></title>
-
-                       <para>This field only applies if <constant>DTV_ISDBT_SOUND_BROADCASTING</constant> is '1'.</para>
-
-                       <para>(Note of the author: This might not be the correct description of the
-                               <constant>SUBCHANNEL-ID</constant> in all details, but it is my understanding of the technical
-                               background needed to program a device)</para>
-
-                       <para>An ISDB-Tsb channel (1 or 3 segments) can be broadcasted alone or in a
-                               set of connected ISDB-Tsb channels. In this set of channels every
-                               channel can be received independently. The number of connected
-                               ISDB-Tsb segment can vary, e.g. depending on the frequency spectrum
-                               bandwidth available.</para>
-
-                       <para>Example: Assume 8 ISDB-Tsb connected segments are broadcasted. The
-                               broadcaster has several possibilities to put those channels in the
-                               air: Assuming a normal 13-segment ISDB-T spectrum he can align the 8
-                               segments from position 1-8 to 5-13 or anything in between.</para>
-
-                       <para>The underlying layer of segments are subchannels: each segment is
-                               consisting of several subchannels with a predefined IDs. A sub-channel
-                               is used to help the demodulator to synchronize on the channel.</para>
-
-                       <para>An ISDB-T channel is always centered over all sub-channels. As for
-                               the example above, in ISDB-Tsb it is no longer as simple as that.</para>
-
-                       <para><constant>The DTV_ISDBT_SB_SUBCHANNEL_ID</constant> parameter is used to give the
-                               sub-channel ID of the segment to be demodulated.</para>
-
-                       <para>Possible values: 0 .. 41, -1 (AUTO)</para>
-               </section>
-
-               <section id="DTV-ISDBT-SB-SEGMENT-IDX">
-
-                       <title><constant>DTV_ISDBT_SB_SEGMENT_IDX</constant></title>
-
-                       <para>This field only applies if <constant>DTV_ISDBT_SOUND_BROADCASTING</constant> is '1'.</para>
-
-                       <para><constant>DTV_ISDBT_SB_SEGMENT_IDX</constant> gives the index of the segment to be
-                               demodulated for an ISDB-Tsb channel where several of them are
-                               transmitted in the connected manner.</para>
-
-                       <para>Possible values: 0 .. <constant>DTV_ISDBT_SB_SEGMENT_COUNT</constant> - 1</para>
-
-                       <para>Note: This value cannot be determined by an automatic channel search.</para>
-               </section>
-
-               <section id="DTV-ISDBT-SB-SEGMENT-COUNT">
-                       <title><constant>DTV_ISDBT_SB_SEGMENT_COUNT</constant></title>
-
-                       <para>This field only applies if <constant>DTV_ISDBT_SOUND_BROADCASTING</constant> is '1'.</para>
-
-                       <para><constant>DTV_ISDBT_SB_SEGMENT_COUNT</constant> gives the total count of connected ISDB-Tsb
-                               channels.</para>
-
-                       <para>Possible values: 1 .. 13</para>
-
-                       <para>Note: This value cannot be determined by an automatic channel search.</para>
-               </section>
-
-               <section id="isdb-hierq-layers">
-                       <title>Hierarchical layers</title>
-
-                       <para>ISDB-T channels can be coded hierarchically. As opposed to DVB-T in
-                               ISDB-T hierarchical layers can be decoded simultaneously. For that
-                               reason a ISDB-T demodulator has 3 viterbi and 3 reed-solomon-decoders.</para>
-
-                       <para>ISDB-T has 3 hierarchical layers which each can use a part of the
-                               available segments. The total number of segments over all layers has
-                               to 13 in ISDB-T.</para>
-
-                       <section id="DTV-ISDBT-LAYER-ENABLED">
-                               <title><constant>DTV_ISDBT_LAYER_ENABLED</constant></title>
-
-                               <para>Hierarchical reception in ISDB-T is achieved by enabling or disabling
-                                       layers in the decoding process. Setting all bits of
-                                       <constant>DTV_ISDBT_LAYER_ENABLED</constant> to '1' forces all layers (if applicable) to be
-                                       demodulated. This is the default.</para>
-
-                               <para>If the channel is in the partial reception mode
-                                       (<constant>DTV_ISDBT_PARTIAL_RECEPTION</constant> = 1) the central segment can be decoded
-                                       independently of the other 12 segments. In that mode layer A has to
-                                       have a <constant>SEGMENT_COUNT</constant> of 1.</para>
-
-                               <para>In ISDB-Tsb only layer A is used, it can be 1 or 3 in ISDB-Tsb
-                                       according to <constant>DTV_ISDBT_PARTIAL_RECEPTION</constant>. <constant>SEGMENT_COUNT</constant> must be filled
-                                       accordingly.</para>
-
-                               <para>Possible values: 0x1, 0x2, 0x4 (|-able)</para>
-
-                               <para><constant>DTV_ISDBT_LAYER_ENABLED[0:0]</constant> - layer A</para>
-                               <para><constant>DTV_ISDBT_LAYER_ENABLED[1:1]</constant> - layer B</para>
-                               <para><constant>DTV_ISDBT_LAYER_ENABLED[2:2]</constant> - layer C</para>
-                               <para><constant>DTV_ISDBT_LAYER_ENABLED[31:3]</constant> unused</para>
-                       </section>
-
-                       <section id="DTV-ISDBT-LAYER-FEC">
-                               <title><constant>DTV_ISDBT_LAYER*_FEC</constant></title>
-
-                               <para>Possible values: <constant>FEC_AUTO</constant>, <constant>FEC_1_2</constant>, <constant>FEC_2_3</constant>, <constant>FEC_3_4</constant>, <constant>FEC_5_6</constant>, <constant>FEC_7_8</constant></para>
-                       </section>
-
-                       <section id="DTV-ISDBT-LAYER-MODULATION">
-                               <title><constant>DTV_ISDBT_LAYER*_MODULATION</constant></title>
-
-                               <para>Possible values: <constant>QAM_AUTO</constant>, QP<constant>SK, QAM_16</constant>, <constant>QAM_64</constant>, <constant>DQPSK</constant></para>
-
-                               <para>Note: If layer C is <constant>DQPSK</constant> layer B has to be <constant>DQPSK</constant>. If layer B is <constant>DQPSK</constant>
-                                       and <constant>DTV_ISDBT_PARTIAL_RECEPTION</constant>=0 layer has to be <constant>DQPSK</constant>.</para>
-                       </section>
-
-                       <section id="DTV-ISDBT-LAYER-SEGMENT-COUNT">
-                               <title><constant>DTV_ISDBT_LAYER*_SEGMENT_COUNT</constant></title>
-
-                               <para>Possible values: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, -1 (AUTO)</para>
-
-                               <para>Note: Truth table for <constant>DTV_ISDBT_SOUND_BROADCASTING</constant> and
-                                       <constant>DTV_ISDBT_PARTIAL_RECEPTION</constant> and <constant>LAYER</constant>*_SEGMENT_COUNT</para>
-
-                               <informaltable id="isdbt-layer_seg-cnt-table">
-                                       <tgroup cols="6">
-
-                                               <tbody>
-                                                       <row>
-                                                               <entry>PR</entry>
-                                                               <entry>SB</entry>
-                                                               <entry>Layer A width</entry>
-                                                               <entry>Layer B width</entry>
-                                                               <entry>Layer C width</entry>
-                                                               <entry>total width</entry>
-                                                       </row>
-
-                                                       <row>
-                                                               <entry>0</entry>
-                                                               <entry>0</entry>
-                                                               <entry>1 .. 13</entry>
-                                                               <entry>1 .. 13</entry>
-                                                               <entry>1 .. 13</entry>
-                                                               <entry>13</entry>
-                                                       </row>
-
-                                                       <row>
-                                                               <entry>1</entry>
-                                                               <entry>0</entry>
-                                                               <entry>1</entry>
-                                                               <entry>1 .. 13</entry>
-                                                               <entry>1 .. 13</entry>
-                                                               <entry>13</entry>
-                                                       </row>
-
-                                                       <row>
-                                                               <entry>0</entry>
-                                                               <entry>1</entry>
-                                                               <entry>1</entry>
-                                                               <entry>0</entry>
-                                                               <entry>0</entry>
-                                                               <entry>1</entry>
-                                                       </row>
-
-                                                       <row>
-                                                               <entry>1</entry>
-                                                               <entry>1</entry>
-                                                               <entry>1</entry>
-                                                               <entry>2</entry>
-                                                               <entry>0</entry>
-                                                               <entry>13</entry>
-                                                       </row>
-                                               </tbody>
-
-                                       </tgroup>
-                               </informaltable>
-
-                       </section>
-
-                       <section id="DTV-ISDBT-LAYER-TIME-INTERLEAVING">
-                               <title><constant>DTV_ISDBT_LAYER*_TIME_INTERLEAVING</constant></title>
-
-                               <para>Possible values: 0, 1, 2, 3, -1 (AUTO)</para>
-
-                               <para>Note: The real inter-leaver depth-names depend on the mode (fft-size); the values
-                                       here are referring to what can be found in the TMCC-structure -
-                                       independent of the mode.</para>
-                       </section>
-               </section>
+       <section id="DTV-ISDBS-TS-ID">
+       <title><constant>DTV_ISDBS_TS_ID</constant></title>
+       <para>Currently unused.</para>
        </section>
-       <section id="dvbt2-params">
-               <title>DVB-T2 parameters</title>
-
-               <para>This section covers parameters that apply only to the DVB-T2 delivery method. DVB-T2
-                       support is currently in the early stages development so expect this section to grow
-                       and become more detailed with time.</para>
-
-               <section id="DTV-DVBT2-PLP-ID">
-                       <title><constant>DTV_DVBT2_PLP_ID</constant></title>
-
-                       <para>DVB-T2 supports Physical Layer Pipes (PLP) to allow transmission of
-                               many data types via a single multiplex. The API will soon support this
-                               at which point this section will be expanded.</para>
+       <section id="DTV-DVBT2-PLP-ID">
+               <title><constant>DTV_DVBT2_PLP_ID</constant></title>
+               <para>DVB-T2 supports Physical Layer Pipes (PLP) to allow transmission of
+                       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="frontend-property-dtv-types">
+       <title>Properties used by each DTV type</title>
+               <section id="isdbt">
+               <title>ISDB-T frontend</title>
+               <para>This section describes shortly what are the possible parameters in the Linux
+                       DVB-API called "S2API" and now DVB API 5 in order to tune an ISDB-T/ISDB-Tsb
+                       demodulator:</para>
+               <para>This ISDB-T/ISDB-Tsb API extension should reflect all information
+                       needed to tune any ISDB-T/ISDB-Tsb hardware. Of course it is possible
+                       that some very sophisticated devices won't need certain parameters to
+                       tune.</para>
+               <para>The information given here should help application writers to know how
+                       to handle ISDB-T and ISDB-Tsb hardware using the Linux DVB-API.</para>
+               <para>The details given here about ISDB-T and ISDB-Tsb are just enough to
+                       basically show the dependencies between the needed parameter values,
+                       but surely some information is left out. For more detailed information
+                       see the following documents:</para>
+               <para>ARIB STD-B31 - "Transmission System for Digital Terrestrial
+                       Television Broadcasting" and</para>
+               <para>ARIB TR-B14 - "Operational Guidelines for Digital Terrestrial
+                       Television Broadcasting".</para>
+               <para>In order to read this document one has to have some knowledge the
+                       channel structure in ISDB-T and ISDB-Tsb. I.e. it has to be known to
+                       the reader that an ISDB-T channel consists of 13 segments, that it can
+                       have up to 3 layer sharing those segments, and things like that.</para>
+               </section>
+               <section id="dvbt2-params">
+                       <title>DVB-T2 parameters</title>
+                       <para>This section covers parameters that apply only to the DVB-T2 delivery method. DVB-T2
+                               support is currently in the early stages development so expect this section to grow
+                               and become more detailed with time.</para>
                </section>
        </section>
 </section>