diff --git a/README.md b/README.md
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+++ b/README.md
@@ -1,2 +1,34 @@
 # rimage
-DSP firmware image creation and signing tool
+
+`rimage` is a DSP firmware image creation and signing tool targeting
+the DSP on certain Intel System-on-Chip (SoC). This is used by
+the [Sound Open Firmware (SOF)](https://github.com/thesofproject/sof)
+to generate binary image files.
+
+## Building
+
+The `rimage` tool can be built with or without logging dictionary
+support, where such support is required to decipher the log messages
+produced the the SOF firmware.
+
+#### Build without dictionary support:
+
+```shell
+$ ./configure
+$ make
+$ make install
+```
+
+#### Build with dictionary support:
+
+To build `rimage` with dictionary support, the SOF source is required.
+First, clone the SOF source tree from
+[here](https://github.com/thesofproject/sof). Then, do:
+
+```shell
+$ ./configure --with-sof-source=<full path to SOF source>
+$ make
+$ make install
+```
+
+Note that creating the SOF firmware image requires dicitionary support.