Apparatus and a method for concealing transmission errors in a s

Details Apparatus and a method for concealing transmission errors in a s Apparatus and a method for concealing transmission errors in a s

1994-06-10

1997-01-28

MacDonald, Allen R.

395 237, G10L 506, G10L 900

Patent

active

055985068

ABSTRACT:
A receiver in a frame based radio communication system includes a speech decoder of the source-filter type which is controlled by internal state variable updated on a frame by frame basis for modifying received filter parameters representing background sounds transmitted over a communication channel. The receiver detects frames containing transmission errors, decides whether a frame in which transmission errors have been detected is acceptable, and conceals the detected transmission errors by restricting updating of at least one of the internal state variables if the detected frame is declared non-acceptable.

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