There is provided rate selection methods and systems for selecting coding rates for coding frames of a speech signal to realize an average bit rate indicated by a mode. For example, a mode 0, mode 1, and a mode 2 may be defined, with each mode requiring a different average bit rate. To achieve the average...http://www.google.se/patents/US7054809?utm_source=gb-gplus-sharePatent US7054809 - Rate selection method for selectable mode vocoder
