http://www.rfc-editor.org/rfc/rfc5053.txt
RFC 5053: Raptor Forward Error Correction Scheme for Object Delivery, M. Luby, A. Shokrollahi, M. Watson, T. Stockhammer2007-10-01T23:00:00-00:00The Raptor code described here is a systematic code, meaning that all the source symbols are among the encoding symbols that can be generated. [STANDARDS-TRACK]