Initial revision

Originally committed as revision 2 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 25 insertions, 0 deletions

diff --git a/doc/README.tech b/doc/README.tech
new file mode 100644
index 0000000000..8ba259d27a
--- /dev/null
+++ b/doc/README.tech
@@ -0,0 +1,25 @@
+Technical notes:
+---------------
+
+- To increase speed, only motion vectors (0,0) are tested
+
+- The decision intra/predicted macroblock is the algorithm suggested
+  by the mpeg 1 specification.
+
+- only Huffman based H263 is supported, mainly because of patent
+  issues.
+
+- Many options can be modified only in the source code.
+
+- I rewrote the mpeg audio layer 2 compatible encoder from scratch. It
+  is one of the simplest encoder you can imagine (800 lines of C code
+  !). It is also one of the fastest because of its simplicity. They
+  are still some problems of overflow. A minimal psycho acoustic model
+  could be added. Only mono stream can be generated. I may add stereo
+  if needed.
+
+- I rewrote the AC3 audio encoder from scratch. It is fairly naive,
+  but the result are quiet interesting at 64 kbit/s. It includes
+  extensions for low sampling rates used in some Internet
+  formats. Differential and coupled stereo is not handled. Stereo
+  channels are simply handled as two mono channels.