aboutsummaryrefslogtreecommitdiffstats
path: root/introduction.tex
diff options
context:
space:
mode:
Diffstat (limited to 'introduction.tex')
-rw-r--r--introduction.tex15
1 files changed, 8 insertions, 7 deletions
diff --git a/introduction.tex b/introduction.tex
index 849849d..e7eb35a 100644
--- a/introduction.tex
+++ b/introduction.tex
@@ -33,14 +33,14 @@ composing a \mmbtools transmission chain, and how to set one up.
\subsection{Origins}
In 2002, Communications Research Centre Canada\footnoteurl{http://crc.ca}
started developing a DAB multiplexer. This effort evolved through the years, and
-was published later\sidenote{when?} as \mbox{CRC-DabMux} under the GPL
+was published in September 2009 as \mbox{CRC-DabMux} under the GPL
open-source licence.
CRC also developed a DAB modulator, called \mbox{CRC-DABMOD}, which could create
baseband I/Q samples from an ETI file. This I/Q data could then be set to
a hardware device using another tool. For the Ettus USRPs, a ``wave player''
script was necessary to interface to GNURadio. Only DAB Transmission Mode 2 was
-supported. \mbox{CRC-DABMOD} was also released under the GPL\sidenote{when?}.
+supported. \mbox{CRC-DABMOD} was also released under the GPL in early 2010.
As encoders, toolame could be used for DAB, and CRC developed a closed-source
\mbox{CRC-DABPLUS} \dabplus encoder.
@@ -52,7 +52,7 @@ part of the \mbox{CRC-mmbTools}. These tools made it possible to set up the
first DAB transmission experiments.
In 2012, these tools received experimental support for single-frequency
-networks, a functionality that has been developed by Matthias P. Braendli during
+networks, a functionality that has been developed by Matthias P. Brändli during
his Master's thesis\footnote{The corresponding report is available at
\url{http://mpb.li/report.pdf}}.
Because SFNs only make sense in TM 1, CRC subsequently released a patch to
@@ -62,9 +62,9 @@ At that point, involvement from CRC started to decline. The SFN patch was
finally never included in the \mbox{CRC-mmbTools}, and as time passed by, the
de-facto fork on \url{http://mpb.li} was receiving more and more features.
Having two different programs with the same name made things complicated, and
-the tools were officially forked with the approval of CRC in Feb 2014, and given
-the new name \mbox{ODR-mmbTools}. They are now developed by the Opendigitalradio
-association.
+the tools were officially forked with the approval of CRC in February 2014, and
+given the new name \mbox{ODR-mmbTools}. They are now developed by the
+Opendigitalradio association.
In April 2014, the official \mbox{CRC-mmbTools} website went offline, and it has
become very difficult, if not impossible to acquire licences for the
@@ -110,7 +110,8 @@ graphical analysis (spectrum) is to be done.
\subsubsection{toolame-dab}
TooLAME is a MPEG-1 Layer II audio encoder that is used to encode audio for the
DAB standard. The original project has been unmaintained since 2003, but the
-twolame fork that pursues the development removed the DAB framing.
+twolame fork that pursues the development removed the DAB framing. Because of
+this, twolame is not suitable for DAB.
The toolame-dab fork includes the ZeroMQ output and PAD insertion support, but
the audio coder is the same as the one in tooLAME.