A message in the form of a sequence of bits is encoded into relatively short, non-binary signals. The message (or vector) is divided into two halves. The encoder first determines an encoding of the message into a vector half the length of the eventual encoded vector. The half-length vector forms the...http://www.google.de/patents/US6263087?utm_source=gb-gplus-sharePatent US6263087 - Method of encoding bits in a signal
