1. An electronic communication method comprising: transmitting a narrowband speech signal comprising a narrowband version of speech utterances of a speaker; transmitting speaker-dependent data comprising data correlating narrowband versions of the speech utterances of the speaker with corresponding wideband versions of the speech utterances of the speaker; receiving the narrowband speech signal and the speaker-dependent data; and using the narrowband speech signal and the speaker-dependent data to generate a wideband speech signal corresponding to a wideband version of the speech utterances of the speaker.
1. An electronic communication method comprising: transmitting a narrowband speech signal comprising a narrowband version of speech utterances of a speaker; transmitting speaker-dependent data comprising data correlating narrowband versions of the speech utterances of the speaker with corresponding wideband versions of the speech utterances of the speaker; receiving the narrowband speech signal and the speaker-dependent data; and using the narrowband speech signal and the speaker-dependent data to generate a wideband speech signal corresponding to a wideband version of the speech utterances of the speaker. 2. The electronic communication method of claim 1 , where the transmission of the speaker-dependent data comprises: transmitting a speaker-dependent narrowband codebook having a plurality of speaker-dependent narrowband code vectors; and transmitting a speaker-dependent wideband codebook having a plurality of speaker-dependent wideband code vectors; where the speaker-dependent narrowband code vectors of the speaker-dependent narrowband codebook are respectively associated with corresponding speaker-dependent wideband code vectors in the speaker-dependent wideband codebook.