A signal encoding method and apparatus for encoding input digital signals by so-called high efficiency encoding, and a recording medium having the encoded signals. An attack portion and a release portion of audio signals are detected and a gain control function is selected at least for waveform elements...http://www.google.com/patents/US5974379?utm_source=gb-gplus-sharePatent US5974379 - Methods and apparatus for gain controlling waveform elements ahead of an attack portion and waveform elements of a release portion
