Patent ID: 11881210
Assignee: GOOGLE LLC
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 4:
5. The method of claim 4, wherein:
the first level of the hierarchical linguistic structure comprises a long short-term memory (LSTM) processing cell representing each syllable of the text utterance;
the second level of the hierarchical linguistic structure comprises a LSTM processing cell representing each phoneme of the text utterance, the LSTM processing cells of the second level clocking relative to and faster than the LSTM processing cells of the first level;
the third level of the hierarchical linguistic structure comprises a LSTM processing cell representing each fixed-length predicted pitch frame, the LSTM processing cells of the third level clocking relative to and faster than the LSTM processing cells of the second level; and
the fourth level of the hierarchical linguistic structure comprises a LSTM processing cell representing each fixed-length predicted energy frame, the LSTM processing cells of the fourth level clocking at the same speed as the LSTM processing cells of the third level and clocking relative to and faster than the LSTM processing cells of the second level.