An innovative method of coding Line Spectrum Pair (LSP) parameters for transmission over noisy channels is presented. The scheme uses a joint source and channel code applied to a concatenated trellis structure. The Viterbi algorithm is used to minimize a cost function that accounts for the expected distortion over the channel. By combining source and channel coding into one operation, the typically large bandwidth increase introduced from explicit channel coding is reduced and overall complexity is decreased. It is noted that the encoding scheme performs well over a wide range of channel Bit Error Rates (BERs) and compares favourably with a standard scalar LSP quantization scheme in terms of bit rate and channel noise immunity. Keywords: Line Spectrum Pair, Joint Source and Channel Coding
Bibliographic reference. Seeker, Philip / Perkis, Andrew (1991): "Joint source and channel coding of line spectrum pairs", In EUROSPEECH-1991, 909-912.