Patent ID: 7634399
Filing Date: 2009-12-15
Classification: G10L

Abstract:
1. A method of transcoding first encoded voice bits into second encoded voice bits, the method comprising: dividing the first encoded voice bits into one or more received frames, with each received frame containing multiple ones of the first encoded voice bits; computing first parameter bits for at least one of the received frames by applying error control decoding to one or more of the encoded voice bits contained in the received frame; computing speech parameters from the first parameter bits; quantizing the speech parameters to produce second parameter bits; determining whether the at least one of the received frames is invalid; if the at least one of the received frames is invalid, substituting invalid frame bits for the second parameter bits; forming a transmission frame by applying error control encoding to one or more of the second parameter bits or the invalid frame bits; and including the transmission frame in the second encoded voice bits.