13. A method for electronically communicating speech between a first party and a second party, the method comprising: transmitting a first narrowband speech signal comprising a narrowband version of speech utterances of the first party; transmitting first speaker-dependent data comprising data correlating narrowband versions of the speech utterances of the first party with corresponding wideband versions of the speech utterances of the first party; receiving the first narrowband speech signal and the first speaker-dependent data by the second party; using the first narrowband speech signal and the first speaker-dependent data to generate a first wideband speech signal corresponding to a wideband version of the speech utterances of the first party at a locus of the second party; transmitting a second narrowband speech signal comprising a narrowband version of speech utterances of the second party; transmitting second speaker-dependent data comprising data correlating narrowband versions of the speech utterances of the second party with corresponding wideband versions of the speech utterances of the second party; receiving the second narrowband speech signal and the second speaker-dependent data by the first party; and using the second narrowband speech signal and the second speaker-dependent data to generate a second wideband speech signal corresponding to a wideband version of the speech utterances of the second party at a locus of the first party.
13. A method for electronically communicating speech between a first party and a second party, the method comprising: transmitting a first narrowband speech signal comprising a narrowband version of speech utterances of the first party; transmitting first speaker-dependent data comprising data correlating narrowband versions of the speech utterances of the first party with corresponding wideband versions of the speech utterances of the first party; receiving the first narrowband speech signal and the first speaker-dependent data by the second party; using the first narrowband speech signal and the first speaker-dependent data to generate a first wideband speech signal corresponding to a wideband version of the speech utterances of the first party at a locus of the second party; transmitting a second narrowband speech signal comprising a narrowband version of speech utterances of the second party; transmitting second speaker-dependent data comprising data correlating narrowband versions of the speech utterances of the second party with corresponding wideband versions of the speech utterances of the second party; receiving the second narrowband speech signal and the second speaker-dependent data by the first party; and using the second narrowband speech signal and the second speaker-dependent data to generate a second wideband speech signal corresponding to a wideband version of the speech utterances of the second party at a locus of the first party. 16. The electronic communication method of claim 13 , where the transmission of the first narrowband speech signal and the transmission of the first speaker-dependent data take place over a single transmission channel.