kopia lustrzana https://github.com/ag1le/morse-wip
Added morse.m and addnoise.m - these are Octave scripts to generate noisy morse code
rodzic
f1873ce0fb
commit
3ea8052a4b
10
Makefile
10
Makefile
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@ -131,12 +131,12 @@ distuninstallcheck_listfiles = find . -type f -print
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am__distuninstallcheck_listfiles = $(distuninstallcheck_listfiles) \
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| sed 's|^\./|$(prefix)/|' | grep -v '$(infodir)/dir$$'
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distcleancheck_listfiles = find . -type f -print
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ACLOCAL = ${SHELL} /home/mauri/Projects/morse-wip/missing --run aclocal-1.11
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ACLOCAL = aclocal-1.11
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AMTAR = $${TAR-tar}
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AM_DEFAULT_VERBOSITY = 0
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AUTOCONF = ${SHELL} /home/mauri/Projects/morse-wip/missing --run autoconf
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AUTOHEADER = ${SHELL} /home/mauri/Projects/morse-wip/missing --run autoheader
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AUTOMAKE = ${SHELL} /home/mauri/Projects/morse-wip/missing --run automake-1.11
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AUTOCONF = autoconf
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AUTOHEADER = autoheader
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AUTOMAKE = automake-1.11
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AWK = gawk
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BMORSE_AUTHORS =
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CC = gcc
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@ -177,7 +177,7 @@ LIBOBJS =
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LIBS = -lm -lsndfile -lfftw3
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LTLIBOBJS =
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MAINT = #
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MAKEINFO = ${SHELL} /home/mauri/Projects/morse-wip/missing --run makeinfo
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MAKEINFO = makeinfo
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MKDIR_P = /bin/mkdir -p
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OBJEXT = o
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PACKAGE = bmorse
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12
README.md
12
README.md
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@ -4,5 +4,17 @@ This software is a Morse decoder orinally created by Dr. E. L. Bell in 1977.
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The software was manually entered from Fortran program listings and later converted to C++
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by AG1LE Mauri Niininen.
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DEPENDENCIES:
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- libsndfile1-dev -- used to open WAV sound files
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- fftw3-dev -- used for FFT calculation
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- tcl -- used for running cer vs snr testing
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- sqlite3 -- used to store test results in SQL database
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- libsqlite3-tcl -- used by tcl to call sqlite3
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install dependencies by
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sudo apt-get install libsndfile1-dev fftw3-dev
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sudo apt-get install tcl
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sudo apt-get install sqlite3
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sudo apt-get install libsqlite3-tcl
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50
config.log
50
config.log
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@ -11,10 +11,10 @@ generated by GNU Autoconf 2.69. Invocation command line was
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## --------- ##
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hostname = X301
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uname -m = i686
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uname -r = 3.8.0-26-generic
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uname -m = x86_64
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uname -r = 3.13.0-24-generic
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uname -s = Linux
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uname -v = #38-Ubuntu SMP Mon Jun 17 21:46:08 UTC 2013
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uname -v = #46-Ubuntu SMP Thu Apr 10 19:11:08 UTC 2014
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/usr/bin/uname -p = unknown
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/bin/uname -X = unknown
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@ -27,7 +27,6 @@ uname -v = #38-Ubuntu SMP Mon Jun 17 21:46:08 UTC 2013
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/usr/bin/oslevel = unknown
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/bin/universe = unknown
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PATH: /usr/lib/i386-linux-gnu/qt4/bin
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PATH: /usr/local/sbin
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PATH: /usr/local/bin
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PATH: /usr/sbin
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@ -46,6 +45,7 @@ configure:2143: checking for a BSD-compatible install
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configure:2211: result: /usr/bin/install -c
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configure:2222: checking whether build environment is sane
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configure:2272: result: yes
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configure:2300: WARNING: `missing' script is too old or missing
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configure:2413: checking for a thread-safe mkdir -p
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configure:2452: result: /bin/mkdir -p
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configure:2465: checking for gawk
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@ -62,8 +62,8 @@ configure:2864: found /usr/bin/g++
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configure:2875: result: g++
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configure:2902: checking for C++ compiler version
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configure:2911: g++ --version >&5
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g++ (Ubuntu/Linaro 4.7.3-1ubuntu1) 4.7.3
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Copyright (C) 2012 Free Software Foundation, Inc.
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g++ (Ubuntu 4.8.2-19ubuntu1) 4.8.2
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Copyright (C) 2013 Free Software Foundation, Inc.
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This is free software; see the source for copying conditions. There is NO
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warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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@ -71,11 +71,11 @@ configure:2922: $? = 0
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configure:2911: g++ -v >&5
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Using built-in specs.
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COLLECT_GCC=g++
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COLLECT_LTO_WRAPPER=/usr/lib/gcc/i686-linux-gnu/4.7/lto-wrapper
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Target: i686-linux-gnu
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Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro 4.7.3-1ubuntu1' --with-bugurl=file:///usr/share/doc/gcc-4.7/README.Bugs --enable-languages=c,c++,go,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-4.7 --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.7 --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-gnu-unique-object --enable-plugin --with-system-zlib --enable-objc-gc --enable-targets=all --with-cloog --enable-cloog-backend=ppl --disable-cloog-version-check --disable-ppl-version-check --enable-multiarch --disable-werror --with-arch-32=i686 --with-multilib-list=m32,m64,mx32 --with-tune=generic --enable-checking=release --build=i686-linux-gnu --host=i686-linux-gnu --target=i686-linux-gnu
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COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/4.8/lto-wrapper
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Target: x86_64-linux-gnu
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Configured with: ../src/configure -v --with-pkgversion='Ubuntu 4.8.2-19ubuntu1' --with-bugurl=file:///usr/share/doc/gcc-4.8/README.Bugs --enable-languages=c,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-4.8 --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.8 --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-gnu-unique-object --disable-libmudflap --enable-plugin --with-system-zlib --disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-4.8-amd64/jre --enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-4.8-amd64 --with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-4.8-amd64 --with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --enable-objc-gc --enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --with-tune=generic --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
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Thread model: posix
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gcc version 4.7.3 (Ubuntu/Linaro 4.7.3-1ubuntu1)
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gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1)
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configure:2922: $? = 0
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configure:2911: g++ -V >&5
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g++: error: unrecognized command line option '-V'
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@ -126,8 +126,8 @@ configure:3680: found /usr/bin/gcc
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configure:3691: result: gcc
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configure:3920: checking for C compiler version
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configure:3929: gcc --version >&5
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gcc (Ubuntu/Linaro 4.7.3-1ubuntu1) 4.7.3
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Copyright (C) 2012 Free Software Foundation, Inc.
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gcc (Ubuntu 4.8.2-19ubuntu1) 4.8.2
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||||
Copyright (C) 2013 Free Software Foundation, Inc.
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This is free software; see the source for copying conditions. There is NO
|
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warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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@ -135,11 +135,11 @@ configure:3940: $? = 0
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configure:3929: gcc -v >&5
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Using built-in specs.
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COLLECT_GCC=gcc
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COLLECT_LTO_WRAPPER=/usr/lib/gcc/i686-linux-gnu/4.7/lto-wrapper
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Target: i686-linux-gnu
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Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro 4.7.3-1ubuntu1' --with-bugurl=file:///usr/share/doc/gcc-4.7/README.Bugs --enable-languages=c,c++,go,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-4.7 --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.7 --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-gnu-unique-object --enable-plugin --with-system-zlib --enable-objc-gc --enable-targets=all --with-cloog --enable-cloog-backend=ppl --disable-cloog-version-check --disable-ppl-version-check --enable-multiarch --disable-werror --with-arch-32=i686 --with-multilib-list=m32,m64,mx32 --with-tune=generic --enable-checking=release --build=i686-linux-gnu --host=i686-linux-gnu --target=i686-linux-gnu
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COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/4.8/lto-wrapper
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Target: x86_64-linux-gnu
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Configured with: ../src/configure -v --with-pkgversion='Ubuntu 4.8.2-19ubuntu1' --with-bugurl=file:///usr/share/doc/gcc-4.8/README.Bugs --enable-languages=c,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-4.8 --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.8 --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-gnu-unique-object --disable-libmudflap --enable-plugin --with-system-zlib --disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-4.8-amd64/jre --enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-4.8-amd64 --with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-4.8-amd64 --with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --enable-objc-gc --enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --with-tune=generic --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
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Thread model: posix
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gcc version 4.7.3 (Ubuntu/Linaro 4.7.3-1ubuntu1)
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gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1)
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configure:3940: $? = 0
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configure:3929: gcc -V >&5
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gcc: error: unrecognized command line option '-V'
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@ -172,6 +172,8 @@ configure:4448: gcc -E conftest.c
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configure:4448: $? = 0
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configure:4462: gcc -E conftest.c
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conftest.c:19:28: fatal error: ac_nonexistent.h: No such file or directory
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#include <ac_nonexistent.h>
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^
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compilation terminated.
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configure:4462: $? = 1
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configure: failed program was:
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@ -199,6 +201,8 @@ configure:4507: gcc -E conftest.c
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configure:4507: $? = 0
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configure:4521: gcc -E conftest.c
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conftest.c:19:28: fatal error: ac_nonexistent.h: No such file or directory
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#include <ac_nonexistent.h>
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^
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compilation terminated.
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configure:4521: $? = 1
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configure: failed program was:
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@ -272,6 +276,8 @@ configure:4797: result: yes
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configure:4810: checking minix/config.h usability
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configure:4810: gcc -c -g -O2 conftest.c >&5
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conftest.c:62:26: fatal error: minix/config.h: No such file or directory
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#include <minix/config.h>
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^
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compilation terminated.
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configure:4810: $? = 1
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configure: failed program was:
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@ -341,6 +347,8 @@ configure:4810: result: no
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configure:4810: checking minix/config.h presence
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configure:4810: gcc -E conftest.c
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conftest.c:29:26: fatal error: minix/config.h: No such file or directory
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#include <minix/config.h>
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^
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compilation terminated.
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configure:4810: $? = 1
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configure: failed program was:
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@ -466,7 +474,7 @@ am_cv_make_support_nested_variables=yes
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## Output variables. ##
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## ----------------- ##
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ACLOCAL='${SHELL} /home/mauri/Projects/morse-wip/missing --run aclocal-1.11'
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ACLOCAL='aclocal-1.11'
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AMDEPBACKSLASH='\'
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AMDEP_FALSE='#'
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AMDEP_TRUE=''
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@ -475,9 +483,9 @@ AM_BACKSLASH='\'
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AM_DEFAULT_V='$(AM_DEFAULT_VERBOSITY)'
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AM_DEFAULT_VERBOSITY='0'
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AM_V='$(V)'
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AUTOCONF='${SHELL} /home/mauri/Projects/morse-wip/missing --run autoconf'
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AUTOHEADER='${SHELL} /home/mauri/Projects/morse-wip/missing --run autoheader'
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AUTOMAKE='${SHELL} /home/mauri/Projects/morse-wip/missing --run automake-1.11'
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AUTOCONF='autoconf'
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AUTOHEADER='autoheader'
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AUTOMAKE='automake-1.11'
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AWK='gawk'
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BMORSE_AUTHORS=''
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CC='gcc'
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@ -508,7 +516,7 @@ LTLIBOBJS=''
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MAINT='#'
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MAINTAINER_MODE_FALSE=''
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MAINTAINER_MODE_TRUE='#'
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MAKEINFO='${SHELL} /home/mauri/Projects/morse-wip/missing --run makeinfo'
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MAKEINFO='makeinfo'
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MKDIR_P='/bin/mkdir -p'
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OBJEXT='o'
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PACKAGE='bmorse'
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@ -0,0 +1,76 @@
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function [ noisy, noise ] = addnoise( signal, noise, snr )
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% ADDNOISE Add noise to signal at a prescribed SNR level.
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%
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% [NOISY,NOISE]=ADDNOISE(SIGNAL,NOISE,SNR) adds NOISE to SIGNAL
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% at a prescribed SNR level. Returns the mixture signal as well
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% as scaled noise such that NOISY=SIGNAL+NOISE.
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%
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% Inputs
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% SIGNAL is a target signal as vector.
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%
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% NOISE is a masker signal as vector, such that
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% length(NOISE)>=length(SIGNAL). Note that
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% in the case that length(NOISE)>length(SIGNAL),
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% a vector of length length(SIGNAL) is selected
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% from NOISE starting at a random sample number.
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%
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% SNR is the desired signal-to-noise ratio level (dB).
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%
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% Outputs
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% NOISY is a mixture signal of SIGNAL and NOISE at given SNR.
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%
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% NOISE is a scaled masker signal, such that the mixture
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% NOISY=SIGNAL+NOISE has the desired SNR.
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%
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% Example
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% % inline function for SNR calculation
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% SNR = @(signal,noisy)( 20*log10(norm(signal)/norm(signal-noisy)) );
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%
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% fs = 16000; % sampling frequency (Hz)
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% freq = 1000; % sinusoid frequency (Hz)
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% time = [ 0:1/fs:2 ]; % time vector (s)
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% signal = sin( 2*pi*freq*time ); % signal vector (s)
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% noise = randn( size(signal) ); % noise vector (s)
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% snr = -5; % desired SNR level (dB)
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%
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% % generate mixture signal: noisy = signal + noise
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% [ noisy, noise ] = addnoise( signal, noise, snr );
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%
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% % check the resulting signal-to-noise ratio
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% fprintf( 'SNR: %0.2f dB\n', SNR(signal,noisy) );
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%
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% See also TEST_ADDNOISE_SINUSOID, TEST_ADDNOISE_SPEECH.
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% Author: Kamil Wojcicki, UTD, July 2011
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% inline function for SNR calculation
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SNR = @(signal,noisy)( 20*log10(norm(signal)/norm(signal-noisy)) );
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% needed for older realases of MATLAB
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randi = @(n)( round(1+(n-1)*rand) );
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% ensure masker is at least as long as the target
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S = length( signal );
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N = length( noise );
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if( S>N ), error( 'Error: length(signal)>length(noise)' ); end;
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% generate a random start location in the masker signal
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R = randi(1+N-S);
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% extract random section of the masker signal
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noise = noise(R:R+S-1);
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% scale the masker w.r.t. to target at a desired SNR level
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noise = noise / norm(noise) * norm(signal) / 10.0^(0.05*snr);
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% generate the mixture signal
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noisy = signal + noise;
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||||
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||||
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% plot(signal,noisy,noise);
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% sanity check
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%assert( abs(SNR(signal,noisy)-snr) < 1E10*eps(snr) );
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||||
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%%% EOF
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@ -0,0 +1,154 @@
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function code=morse(varargin)
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% MORSE converts text to playable morse code in wav format
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||||
%
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||||
% SYNTAX
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||||
% morse(text)
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% morse(text,file_name);
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||||
% morse(text,file_name,snr);
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% morse(text, file_name,snr,code_frequency);
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% morse(text, file_name,snr,code_frequency,sample_rate);
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% morse(text, file_name,snr,code_frequency,sample_rate, code_speed_wpm, zero_fill_to_N);
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% morse(text, file_name,snr,code_frequency,sample_rate, code_speed_wpm, zero_fill_to_N, play_sound);
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%
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% Description:
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||||
%
|
||||
% If the wave file name is specified, then the funtion will output a wav
|
||||
% file with that file name. If only text is specified, then the function
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% will only play the morse code wav file without saving it to a wav file.
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||||
% If a snr is specified, zero mean addative white Gaussian
|
||||
% noise is added
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||||
%
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||||
% Examples:
|
||||
%
|
||||
% morse('Hello');
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||||
% morse('How are you doing my friend?','morsecode.wav');
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||||
% morse('How are you doing my friend?','morsecode.wav', 20);
|
||||
% morse('How are you doing my friend?','morsecode.wav', 10, 440,Fs,20);
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||||
% x = morse('How are you doing my friend?','morsecode.wav', 3, 440,Fs, 20, 2^20,1); %(to play the file, and make the length 2^20)
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||||
%
|
||||
% Copyright 2005 Fahad Al Mahmood
|
||||
% Version: 1.1 $ $Date: 08-Jul-2010
|
||||
% Modifications: Rob Frohne, KL7NA
|
||||
% Modofications: Mauri Niininen, AG1LE
|
||||
%Defualt values
|
||||
Fs=48000;
|
||||
snr = 20;
|
||||
f_code = 375;
|
||||
code_speed = 20;
|
||||
text = varargin{1}
|
||||
if nargin>=2
|
||||
file = varargin{2}
|
||||
end
|
||||
if nargin>=3
|
||||
snr = varargin{3};
|
||||
end
|
||||
if nargin>=4
|
||||
f_code = varargin{4};
|
||||
end
|
||||
if nargin>=5
|
||||
Fs = varargin{5};
|
||||
end
|
||||
if nargin>=6
|
||||
code_speed = varargin{6};
|
||||
end
|
||||
if nargin>=7
|
||||
length_N = varargin{7};
|
||||
end
|
||||
if nargin>=8
|
||||
playsound = varargin{8};
|
||||
end
|
||||
t=0:1/Fs:1.2/code_speed; %One dit of time at w wpm is 1.2/w.
|
||||
t=t';
|
||||
Dit = sin(2*pi*f_code*t);
|
||||
ssp = zeros(size(Dit));
|
||||
#Dah fixed by Zach Swena
|
||||
t2=0:1/Fs:3*1.2/code_speed; # one Dah of time is 3 times dit time
|
||||
t2=t2';
|
||||
Dah = sin(2*pi*f_code*t2);
|
||||
lsp = zeros(size(Dah)); # changed size argument to function of Dah
|
||||
#Dah = [Dit;Dit;Dit];
|
||||
#lsp = zeros(size([Dit;Dit;Dit]));
|
||||
% Defining Characters & Numbers
|
||||
A = [Dit;ssp;Dah];
|
||||
B = [Dah;ssp;Dit;ssp;Dit;ssp;Dit];
|
||||
C = [Dah;ssp;Dit;ssp;Dah;ssp;Dit];
|
||||
D = [Dah;ssp;Dit;ssp;Dit];
|
||||
E = [Dit];
|
||||
F = [Dit;ssp;Dit;ssp;Dah;ssp;Dit];
|
||||
G = [Dah;ssp;Dah;ssp;Dit];
|
||||
H = [Dit;ssp;Dit;ssp;Dit;ssp;Dit];
|
||||
I = [Dit;ssp;Dit];
|
||||
J = [Dit;ssp;Dah;ssp;Dah;ssp;Dah];
|
||||
K = [Dah;ssp;Dit;ssp;Dah];
|
||||
L = [Dit;ssp;Dah;ssp;Dit;ssp;Dit];
|
||||
M = [Dah;ssp;Dah];
|
||||
N = [Dah;ssp;Dit];
|
||||
O = [Dah;ssp;Dah;ssp;Dah];
|
||||
P = [Dit;ssp;Dah;ssp;Dah;ssp;Dit];
|
||||
Q = [Dah;ssp;Dah;ssp;Dit;ssp;Dah];
|
||||
R = [Dit;ssp;Dah;ssp;Dit];
|
||||
S = [Dit;ssp;Dit;ssp;Dit];
|
||||
T = [Dah];
|
||||
U = [Dit;ssp;Dit;ssp;Dah];
|
||||
V = [Dit;ssp;Dit;ssp;Dit;ssp;Dah];
|
||||
W = [Dit;ssp;Dah;ssp;Dah];
|
||||
X = [Dah;ssp;Dit;ssp;Dit;ssp;Dah];
|
||||
Y = [Dah;ssp;Dit;ssp;Dah;ssp;Dah];
|
||||
Z = [Dah;ssp;Dah;ssp;Dit;ssp;Dit];
|
||||
period = [Dit;ssp;Dah;ssp;Dit;ssp;Dah;ssp;Dit;ssp;Dah];
|
||||
comma = [Dah;ssp;Dah;ssp;Dit;ssp;Dit;ssp;Dah;ssp;Dah];
|
||||
question = [Dit;ssp;Dit;ssp;Dah;ssp;Dah;ssp;Dit;ssp;Dit];
|
||||
slash_ = [Dah;ssp;Dit;ssp;Dit;ssp;Dah;ssp;Dit];
|
||||
n1 = [Dit;ssp;Dah;ssp;Dah;ssp;Dah;ssp;Dah];
|
||||
n2 = [Dit;ssp;Dit;ssp;Dah;ssp;Dah;ssp;Dah];
|
||||
n3 = [Dit;ssp;Dit;ssp;Dit;ssp;Dah;ssp;Dah];
|
||||
n4 = [Dit;ssp;Dit;ssp;Dit;ssp;Dit;ssp;Dah];
|
||||
n5 = [Dit;ssp;Dit;ssp;Dit;ssp;Dit;ssp;Dit];
|
||||
n6 = [Dah;ssp;Dit;ssp;Dit;ssp;Dit;ssp;Dit];
|
||||
n7 = [Dah;ssp;Dah;ssp;Dit;ssp;Dit;ssp;Dit];
|
||||
n8 = [Dah;ssp;Dah;ssp;Dah;ssp;Dit;ssp;Dit];
|
||||
n9 = [Dah;ssp;Dah;ssp;Dah;ssp;Dah;ssp;Dit];
|
||||
n0 = [Dah;ssp;Dah;ssp;Dah;ssp;Dah;ssp;Dah];
|
||||
text = upper(text);
|
||||
vars ={'period','comma','question','slash_'};
|
||||
morsecode=[];
|
||||
for i=1:length(text)
|
||||
if isvarname(text(i))
|
||||
morsecode = [morsecode;eval(text(i))];
|
||||
elseif ismember(text(i),'.,?/')
|
||||
x = findstr(text(i),'.,?/');
|
||||
morsecode = [morsecode;eval(vars{x})];
|
||||
elseif ~isempty(str2num(text(i)))
|
||||
morsecode = [morsecode;eval(['n' text(i)])];
|
||||
elseif text(i)==' '
|
||||
morsecode = [morsecode;ssp;ssp;ssp;ssp];
|
||||
end
|
||||
morsecode = [morsecode;lsp];
|
||||
end
|
||||
if exist('length_N','var')
|
||||
append_length = length_N - length(morsecode);
|
||||
if (append_length < 0)
|
||||
printf("Length %d isn't large enough for your message; it must be > %d.\n",length_N,length(morsecode));
|
||||
return;
|
||||
else
|
||||
morsecode = [morsecode; zeros(append_length,1)];
|
||||
end
|
||||
end
|
||||
noise = randn(size(morsecode) );
|
||||
[noisy,noise] = addnoise(morsecode,noise,snr);
|
||||
|
||||
SNR =20*log10(norm(morsecode)/norm(noise)) %(morsecode-noisy));
|
||||
printf('SNR =%f dB\n',SNR);
|
||||
|
||||
|
||||
if exist('file','var')
|
||||
wavwrite(noisy,Fs,16,file);
|
||||
if exist('playsound')
|
||||
system(['aplay ',file]);
|
||||
end
|
||||
else
|
||||
soundsc(noisy,Fs);
|
||||
% wavplay(morsecode);
|
||||
end
|
||||
code = noisy;
|
||||
endfunction
|
Ładowanie…
Reference in New Issue