| 摘要 |
<p>In methods and apparatus for distinguishing speech intervals from noise intervals in a audio signal, a first parameter set characterizing the audio signal is determined for each of a plurality of successive time intervals. A second parameter set for each of the time intervals is determined from the first parameter set. The second parameter set indicates a magnitude of change in the first parameter set over a plurality of preceeding time intervals. The time intervals are declared to be speech intervals when the second parameter set indicates a magnitude of change greater than a predetermined change. The time intervals are declared to be noise intervals when the second parameter set indicates a magnitude of change less than the predetermined change. The methods and apparatus are useful for speech encoding.</p> |
