diff options
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/DocBook/media/dvb/dvbproperty.xml | 681 |
1 files changed, 311 insertions, 370 deletions
diff --git a/Documentation/DocBook/media/dvb/dvbproperty.xml b/Documentation/DocBook/media/dvb/dvbproperty.xml index 01f39337e3f7..d8a642475ad8 100644 --- a/Documentation/DocBook/media/dvb/dvbproperty.xml +++ b/Documentation/DocBook/media/dvb/dvbproperty.xml @@ -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> |