| 摘要 |
A telecommunications system ( 600 ) distributes text-to-speech synthesis ( 900 ) between a telephone network ( 603 ) and a telephone subscriber unit ( 602 ). The telephone network ( 603 ) receives ( 1102 ) a telephone call from a first telephone subscriber unit ( 601 ) over a first communication channel ( 604 ) intended for a second telephone subscriber unit ( 602 ), determines ( 1103 ) that the second telephone subscriber unit ( 602 ) subscribes to a speech-based caller identification service provided by the telephone network ( 603 ), converts ( 1107 ) text information ( 707 ), representing the caller identification of the first telephone subscriber unit ( 601 ) into symbols ( 708 ), encodes ( 1108 ) the symbols ( 708 ) to form a data stream ( 709 ), opens ( 1109 ) a second communication channel ( 605 ) between the telephone network ( 603 ) and the second telephone subscriber unit ( 602 ), and sends ( 1110 ) the data stream ( 709 ) to the second telephone subscriber unit ( 602 ) over the second communication channel ( 605 ). The second telephone subscriber unit ( 602 ) detects ( 1202 ) that the telephone network ( 603 ) opened the second communication channel ( 605 ), receives ( 1203 ) the data stream ( 807 ) from the telephone network ( 603 ), decodes ( 1206 ) the data stream ( 807 ) to form decoded symbols ( 808 ), converts ( 1207 ) the decoded symbols ( 808 ) to form a speech waveform ( 809 ), and generates ( 1211 ) speech from the speech waveform ( 809 ) to permit a second party associated with the second telephone subscriber unit ( 602 ) to listen to the speech to identify an identity of a first party associated with the first telephone subscriber unit ( 601 ) prior to accepting the telephone call from the first telephone subscriber unit ( 601 ). The symbols ( 708 ) may be generated at various points ( 909, 910 ) within the distributed text-to-speech synthesizer ( 900 ) depending on the requirements and limitations of the telecommunication system ( 600 ).
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