System for generating a wideband signal from a received narrowband signal

A system for use in providing a wideband signal from a received narrowband signal comprising:

• an extracted narrowband feature vector corresponding to at least one characteristic of the narrowband signal;
• a narrowband codebook having one or more narrowband codebook index vectors, where each narrowband codebook vector index corresponds to a narrowband codebook entry;
• an analyzer responsive to the extracted narrowband feature vector to identify the narrowband codebook feature index vector that best matches the extracted narrowband feature vector;
• a signal mapper adapted to execute a mapping function of the narrowband codebook index vector using mapping parameters corresponding to the narrowband codebook entry associated with the narrowband codebook feature index vector identified by the analyzer, where the signal mapper generates at least one estimated wideband feature vector through execution of the mapping function;
• and
• a generator responsive to the at least one estimated wideband feature vector to generate a corresponding wideband data signal.

A method for use in providing a wideband signal from a received narrowband signal comprising:

• providing a narrowband codebook comprising at least one narrowband codebook index vector associated with one or more narrowband codebook entries;
• receiving at least one narrowband signal;
• extracting at least one narrowband feature vector from the at least one received narrowband signal;
• selecting a narrowband codebook index vector that best corresponds to the at least one extracted narrowband feature vector;
• performing a mapping operation on the selected narrowband codebook index vector to generate at least one estimated wideband feature vector using mapping parameters related to the narrowband codebook entry associated with the selected narrowband codebook index vector.

A method for use in providing a wideband signal from a received narrowband signal comprising:

• providing a narrowband codebook comprising at least one narrowband codebook index vector associated with one or more narrowband codebook parameters;
• receiving at least one narrowband signal;
• extracting at least one narrowband feature vector from the at least one received narrowband signal;
• selecting a narrowband codebook index vector that best corresponds to the at least one extracted narrowband feature vector;
• performing a mapping operation on the extracted narrowband feature vector to generate at least one estimated wideband feature vector using mapping parameters related to the narrowband codebook parameters associated with the selected narrowband codebook index vector.

A computer program comprising one or more computer readable media having computer-executable instructions for performing a method, the method comprising:

• providing a narrowband codebook comprising at least one narrowband codebook index vector associated with one or more narrowband codebook parameters;
• receiving at least one narrowband signal;
• extracting at least one narrowband feature vector from the at least one received narrowband signal;
• selecting a narrowband codebook index vector that best corresponds to the at least one extracted narrowband feature vector;
• performing a mapping operation on the extracted narrowband feature vector and/or the selected narrowband codebook index vector to generate at least one estimated wideband feature vector using mapping parameters related to the narrowband codebook parameters associated with the selected narrowband codebook index vector.