Voicing smoother

A method of correcting errors in a digital speech signal, the method comprising:

• receiving a voice bit stream;
• generating, from the received voice bit stream, voicing bits of a current frame, voicing bits of a prior frame, and a voicing confidence measure for the current frame;
• determining whether the voicing confidence measure is less than a first threshold;
• in response to determining that the voicing confidence measure is less than the first threshold:
• generating a set of common voicing patterns;
• determining whether the current frame matches a voicing pattern in the set of common voicing patterns;
• and
• in response to the current frame failing to match any voicing pattern in the set of common voicing patterns:
• resampling voicing bands of the prior frame, so that a number of voicing bands in the resampled prior frame is the same as a number of voicing bands in the current frame;
• determining a distance for each of the set of common voicing patterns with respect to the current frame and the prior frame;
• and
• replacing the current frame with a particular voicing pattern in the set of common voicing patterns that has a smallest determined distance.