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diff --git a/README.md b/README.md
index 46ef6b2..726152c 100644
--- a/README.md
+++ b/README.md
@@ -110,6 +110,10 @@ We have standardized on C99 and develop and test using gcc on a Linux platform.
make
```
+## Documentation
+
+An algorithm description can be found in `doc/codec2.pdf`.
+
## Programs
+ See `demo` directory for simple examples of using Codec and the FreeDV API.
@@ -138,7 +142,7 @@ CTest is used as a test framework, with support from [GNU Octave](https://www.gn
1. Install GNU Octave and libraries on Ubuntu with:
```
- sudo apt install octave octave-common octave-signal liboctave-dev gnuplot python3-numpy sox valgrind clang-format
+ sudo apt install octave octave-common octave-signal liboctave-dev gnuplot python3-numpy sox valgrind clang-format texmaker texlive-bibtex-extra texlive-science
```
1. To build and run the tests:
```
@@ -180,6 +184,7 @@ CTest is used as a test framework, with support from [GNU Octave](https://www.gn
```
cmake - cmake support files
demo - Simple Codec 2 and FreeDv API demo applications
+doc - documentation
octave - Octave scripts used to support ctests
src - C source code for Codec 2, FDMDV modem, COHPSK modem, FreeDV API
raw - speech files in raw format (16 bits signed linear 8 kHz)