Perhaps you should try some spelling variations:
multirate processing » multi processing (Expand search), multiuser processing (Expand search), multimedia processing (Expand search)
decrease multirate » decrease intimate (Expand search)
decoder codec » decoder codecs (Expand search), decoder model (Expand search), decoder models (Expand search)
piton python » pitons python (Expand search), in python (Expand search), with python (Expand search)
python code » python coding (Expand search), python redes (Expand search)
code piton » code position (Expand search)

You may be able to get more results by adjusting your search query.

• Removing quotes may allow a broader search: (( decoder codec decrease multirate processing ) OR ( python code piton python programming ))~.