ODR-DabMux

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Revision as of 15:22, 13 October 2010

CRC-DabMux is the free open source DAB Multiplexer developed by Communication Research Center (CRC) from Canada. It is used in command line.

More information

Description can be found on http://mmbtools.crc.ca/content/view/39/65/

Source code is now released (since September 2008).

Build information

When building from the source code, be careful to disable debugging, otherwise there will be lot of wasted CPU usage:

./configure --with-debug-malloc=no --disable-debug

CRC-DabMux depend on libfec from Phil Karn. From recent versions of Ubuntu (10.04), libfec has a compilation error (" fec.h:267: Error: bad register name `%dil' "). Here's a workaround by Pascal Charest from CRC, on line 267 from fec.h: Replace

__asm__ __volatile__ ("test %1,%1;setpo %0" : "=g"(x) : "r" (x));

by

__asm__ __volatile__ ("test %1,%1;setpo %0" : "=q"(x) : "q" (x));

CRC-DabMux Man page

NAME

 CRC-DabMux - A software DAB multiplexer

SYNOPSYS

 CRC-DabMux [ensemble] [subchannel1 subchannel2 ...] [service1 component1 [component2 ...] service2 ...] [output1 ...] [-h] [-m mode] [-n nbFrames] [-o] [-V] [-z]

 Where ensemble = [-i ensembleId] [-L label] [-l sLabel]

 Where subchannel = -(A | B | D | E | F | M | P | T) inputName [-b bitrate] [-i subchannelId] [-k] [-p protection]

 Where service = -S [-g language] [-i serviceId] [-L label] [-l sLabel] [-y PTy]

 Where component = -C [-a address] [-d] [-f figType] [-i subchannelId] [-L label] [-l sLabel] [-t type]

DESCRIPTION

 CRC-DabMux  is  a  software  multiplexer  that generates an ETI stream from
 audio and data streams. Because of  its  software  based  architecture,
 many  typical DAB services can be generated and multiplexed on a single
 PC platform with live or pre-recorded sources.

 A DAB multiplex configuration is composed of one ensemble. An  ensemble
 is  the entity that receivers tune to and process. An ensemble contains
 several services. A service is  the  listener-selectable  output.  Each
 service  contains  one mandatory service component which is called pri-
 mary component. An audio primary component  define  a  program  service
 while  a data primary component define a data service. Service can con-
 tain additional components which are called secondary components. Maxi-
 mum  total  number  of components is 12 for program services and 11 for
 data services. A service component is a link to one subchannel (of Fast
 Information  Data  Channel).  A  subchannel  is the physical space used
 within the common interleaved frame.

  __________________________________________________
 |                   CRC-Ensemble                   |  ENSEMBLE
 |__________________________________________________|
         |                 |                 |
         |                 |                 |
  _______V______    _______V______    _______V______
 | CRC-Service1 |  | CRC-Service2 |  | CRC-Service3 |  SERVICES
 |______________|  |______________|  |______________|
    |        |        |        | |______         |
    |        |        |        |        |        |
  __V__    __V__    __V__    __V__    __V__    __V__
 | SC1 |  | SC2 |  | SC3 |  | SC4 |  | SC5 |  | SC6 |  SERVICE
 |_____|  |_____|  |_____|  |_____|  |_____|  |_____|  COMPONENTS
    |        |   _____|        |        |    ____|
    |        |  |              |        |   |
  __V________V__V______________V________V___V_______   COMMON
 | SubCh1 | SubCh9 |  ...  | SubCh3 | SubCh60 | ... |  INTERLEAVED
 |________|________|_______|________|_________|_____|  FRAME
 Figure 1: An example of a DAB multiplex configuration

GENERAL OPTIONS

 -h                   : get this help
 -m                   : DAB mode (default: 2)
 -n nbFrames          : number of frames to produce
 -o                   : turn on TCP log on port 12222
 -V                   : print version information and exit
 -z                   : write SCCA field for Factum ETI analyzer

INPUT OPTIONS

 -A                   : set audio service
 -A                   : set CRC-Bridge data service
 -D                   : set data service
 -E                   : set enhanced packet service
 -F                   : set DAB+ service
 -M                   : set DMB service
 -P                   : set packet service
 -T                   : set test service
 inputName<n>         : name of file for audio and packet service and Udp input address for data service ([address]:port)
 -a                   : packet address (default: 0x200 (512))
 -b bitrate<n>        : bitrate (in kbits/s) of the subchannel (default: audio 1st frame, data 384, packet 32)
 -d                   : turn on datagroups in packet mode
 -f figType           : user application type in FIG 0/13 for packet mode
 -g language          : Primary service component language: english=9, french=15
 -i id<n>             : service|subchannel|serviceComponent id <n> (default: <n>)
 -k                   : set non-blocking file input (audio and packet only)
 -L label<n>          : label of service <n> (default: CRC-Audio<n>)
 -l sLabel<n>         : short label flag of service <n> (default: 0xf040)
 -p protection<n>     : protection level (default: 3)
 -t type              : audio/data service component type (default: 0)
                        audio: foreground=0, background=1, multi-channel=2
                        data: unspecified=0, TMC=1, EWS=2, ITTS=3, paging=4, TDC=5, IP=59, MOT=60, proprietary=61
 -y PTy               : Primary service component program type international code

OUTPUT OPTIONS

 -O output            : name of the output in format scheme://[address][:port][/name]
                        where scheme is (raw|udp|tcp|file|fifo|simul)

• CRC-DabMux man page