[linux-dvb] inital tuning data for dvb-t in nuernberg

Joachim Steiger roh at hyte.de
Fri Jun 3 04:54:34 CEST 2005


i just played around a bit with dvbsnoop on the ard and prosieben
transponderns and found they both transmit a nit which contains the
212500.000 kHz (on the ard package at 184.5MHz) and 690000.000 kHz
(on prosieben at 626MHz) information.
the question now is: why is scan looping for over an hour, repeating
to scan the same channels over and over (and adding the dups to the
channels.conf)?
in my opinion these nit should never be broadcast here since it could
make el-cheapo recievers dizzy and scan should ignore it if -n is
omited.
please comment ;)
anyways, here is a dump

--

roh

-------------- next part --------------
ard:
------------------------------------------------------------
SECT-Packet: 00000019   PID: 16 (0x0010), Length: 68 (0x0044)
Time received: Fri 2005-06-03  04:42:06.208
------------------------------------------------------------
  0000:  40 f0 41 30 30 c1 00 00  f0 0c 40 0a 41 52 44 20   @.A00..... at .ARD
  0010:  42 61 79 65 72 6e f0 28  30 01 21 14 f0 22 41 0c   Bayern.(0.!.."A.
  0020:  00 06 01 00 03 01 00 02  01 00 20 01 5a 0b 01 44   .......... .Z..D
  0030:  3f d0 3f 42 1b ff ff ff  ff 62 05 ff 01 19 86 50   ?.?B.....b.....P
  0040:  6a a5 59 e3                                        j.Y.

PID:  16 (0x0010)  [= assigned for: DVB Network Information Table (NIT), Stuffing Table (ST)]
Guess table from table id...
NIT-decoding....
Table_ID: 64 (0x40)  [= Network Information Table (NIT) - actual network]
section_syntax_indicator: 1 (0x01)
reserved_1: 1 (0x01)
reserved_2: 3 (0x03)
Section_length: 65 (0x0041)
Network_ID: 12336 (0x3030)  [= --> please lookup at http://www.dvb.org]
reserved_3: 3 (0x03)
Version_number: 0 (0x00)
current_next_indicator: 1 (0x01)  [= valid now]
Section_number: 0 (0x00)
Last_Section_number: 0 (0x00)
reserved_4: 15 (0x0f)
Network_descriptor_length: 12 (0x000c)

        DVB-DescriptorTag: 64 (0x40)  [= network_name_descriptor]
        Descriptor_length: 10 (0x0a)
        Network_name: "ARD Bayern"  -- Charset: Latin alphabet


reserved_5: 15 (0x0f)
Transport_stream_loop_length: 40 (0x0028)

    Transport_stream_ID: 12289 (0x3001)
    Original_network_ID: 8468 (0x2114)  [= German Digital Terrestrial Television | IRT on behalf of the German DVB-T broadcasts]    reserved_1: 15 (0x0f)
    Transport_descriptor_length: 34 (0x0022)

            DVB-DescriptorTag: 65 (0x41)  [= service_list_descriptor]
            Descriptor_length: 12 (0x0c)
               service_ID: 6 (0x0006)[ --> refers to PMT program_number]
               service_type: 1 (0x01)  [= digital television service]

               service_ID: 3 (0x0003)[ --> refers to PMT program_number]
               service_type: 1 (0x01)  [= digital television service]

               service_ID: 2 (0x0002)[ --> refers to PMT program_number]
               service_type: 1 (0x01)  [= digital television service]

               service_ID: 32 (0x0020)[ --> refers to PMT program_number]
               service_type: 1 (0x01)  [= digital television service]


            DVB-DescriptorTag: 90 (0x5a)  [= terrestrial_delivery_system_descriptor]
            Descriptor_length: 11 (0x0b)
            Center frequency: 0x01443fd0 (= 212500.000 kHz)
            Bandwidth: 1 (0x01)  [= 7 MHz]
            priority: 1 (0x01)  [= HP (high priority)]
            Time_Slicing_indicator: 1 (0x01)  [= Time Slicing is not used.)]
            MPE-FEC_indicator: 1 (0x01)  [= MPE-FEC is not used.)]
            reserved_1: 3 (0x03)
            Constellation: 1 (0x01)  [= 16-QAM]
            Hierarchy information: 0 (0x00)  [= non-hierarchical]
            Code_rate_HP_stream: 2 (0x02)  [= 3/4]
            Code_rate_LP_stream: 0 (0x00)  [= 1/2]
            Guard_interval: 3 (0x03)  [= 1/4]
            Transmission_mode: 1 (0x01)  [= 8k mode]
            Other_frequency_flag: 1 (0x01)
            reserved_2: 4294967295 (0xffffffff)

            DVB-DescriptorTag: 98 (0x62)  [= frequency_list_descriptor]
            Descriptor_length: 5 (0x05)
            reserved_1: 63 (0x3f)
            coding_type: 3 (0x03)  [= terrestrial]
               Centre_frequency: 01198650  (= 184500.000 kHz)

CRC: 1789221347 (0x6aa559e3)
==========================================================


prosieben:
------------------------------------------------------------
SECT-Packet: 00000001   PID: 16 (0x0010), Length: 67 (0x0043)
Time received: Fri 2005-06-03  04:42:42.952
------------------------------------------------------------
  0000:  40 f0 40 30 33 d7 00 00  f0 0b 40 09 54 2d 53 79   @. at 03.....@.T-Sy
  0010:  73 74 65 6d 73 f0 28 33  01 21 14 f0 22 41 0c 40   stems.(3.!.."A.@
  0020:  0e 01 40 13 01 40 0a 01  40 18 01 5a 0b 04 1c db   .. at ..@.. at ..Z....
  0030:  40 1f 41 1b ff ff ff ff  62 05 ff 03 bb 33 40 cd   @.A.....b....3 at .
  0040:  c9 61 c2                                           .a.

PID:  16 (0x0010)  [= assigned for: DVB Network Information Table (NIT), Stuffing Table (ST)]
Guess table from table id...
NIT-decoding....
Table_ID: 64 (0x40)  [= Network Information Table (NIT) - actual network]
section_syntax_indicator: 1 (0x01)
reserved_1: 1 (0x01)
reserved_2: 3 (0x03)
Section_length: 64 (0x0040)
Network_ID: 12339 (0x3033)  [= --> please lookup at http://www.dvb.org]
reserved_3: 3 (0x03)
Version_number: 11 (0x0b)
current_next_indicator: 1 (0x01)  [= valid now]
Section_number: 0 (0x00)
Last_Section_number: 0 (0x00)
reserved_4: 15 (0x0f)
Network_descriptor_length: 11 (0x000b)

        DVB-DescriptorTag: 64 (0x40)  [= network_name_descriptor]
        Descriptor_length: 9 (0x09)
        Network_name: "T-Systems"  -- Charset: Latin alphabet


reserved_5: 15 (0x0f)
Transport_stream_loop_length: 40 (0x0028)

    Transport_stream_ID: 13057 (0x3301)
    Original_network_ID: 8468 (0x2114)  [= German Digital Terrestrial Television | IRT on behalf of the German DVB-T broadcasts]    reserved_1: 15 (0x0f)
    Transport_descriptor_length: 34 (0x0022)

            DVB-DescriptorTag: 65 (0x41)  [= service_list_descriptor]
            Descriptor_length: 12 (0x0c)
               service_ID: 16398 (0x400e)[ --> refers to PMT program_number]
               service_type: 1 (0x01)  [= digital television service]

               service_ID: 16403 (0x4013)[ --> refers to PMT program_number]
               service_type: 1 (0x01)  [= digital television service]

               service_ID: 16394 (0x400a)[ --> refers to PMT program_number]
               service_type: 1 (0x01)  [= digital television service]

               service_ID: 16408 (0x4018)[ --> refers to PMT program_number]
               service_type: 1 (0x01)  [= digital television service]


            DVB-DescriptorTag: 90 (0x5a)  [= terrestrial_delivery_system_descriptor]
            Descriptor_length: 11 (0x0b)
            Center frequency: 0x041cdb40 (= 690000.000 kHz)
            Bandwidth: 0 (0x00)  [= 8 MHz]
            priority: 1 (0x01)  [= HP (high priority)]
            Time_Slicing_indicator: 1 (0x01)  [= Time Slicing is not used.)]
            MPE-FEC_indicator: 1 (0x01)  [= MPE-FEC is not used.)]
            reserved_1: 3 (0x03)
            Constellation: 1 (0x01)  [= 16-QAM]
            Hierarchy information: 0 (0x00)  [= non-hierarchical]
            Code_rate_HP_stream: 1 (0x01)  [= 2/3]
            Code_rate_LP_stream: 0 (0x00)  [= 1/2]
            Guard_interval: 3 (0x03)  [= 1/4]
            Transmission_mode: 1 (0x01)  [= 8k mode]
            Other_frequency_flag: 1 (0x01)
            reserved_2: 4294967295 (0xffffffff)

            DVB-DescriptorTag: 98 (0x62)  [= frequency_list_descriptor]
            Descriptor_length: 5 (0x05)
            reserved_1: 63 (0x3f)
            coding_type: 3 (0x03)  [= terrestrial]
               Centre_frequency: 03bb3340  (= 626000.000 kHz)

CRC: 3452527042 (0xcdc961c2)
==========================================================


More information about the linux-dvb mailing list