A speech signal is decoded by a vocoder and the reconstructed speech samples are provided to a decoded frame check unit. The decoded frame check unit examines the energy of the reconstructed speech and compares the energy of the reconstructed speech to a range of acceptable energy values. If the energy...http://www.google.de/patents/US7788092?utm_source=gb-gplus-sharePatent US7788092 - Method and apparatus for detecting bad data packets received by a mobile telephone using decoded speech parameters
