The present invention provides a new method and an apparatus for spectral envelope encoding. The invention teaches how to perform and signal compactly a time/frequency mapping of the envelope representation, and further, encode the spectral envelope data efficiently using adaptive time/frequency directional...http://www.google.fr/patents/US7191121?utm_source=gb-gplus-shareBrevet US7191121 - Efficient spectral envelope coding using variable time/frequency resolution and time/frequency switching
Efficient spectral envelope coding using variable time/frequency resolution ...
