Method of encoding synthetic speech

• US 6,014,623 A
• Filed: 06/12/1997
• Issued: 01/11/2000
• Est. Priority Date: 06/12/1997
• Status: Expired due to Term

• Current Assignee: United Microelectronics Corporation
• Original Assignee: United Microelectronics Corporation
• Inventors: Wu, Xingjun, Sun, Yihe
• Primary Examiner(s): Hudspeth, David R.
• Assistant Examiner(s): MCFADDEN, SUSAN IRIS
• Application Number:
  US08/873,803
• Time in Patent Office: 943 Days
• Field of Search: 704/230, 704/219, 704/214, 704/229, 704/222, 704/220, 704/223
• US Class Current: 704/230
• CPC Class Codes: G10L 19/07 Line spectrum pair [LSP] vocoders

Abstract

A method of synthetic speech, wherein the method forms a speech data base, the speech data base includes plural syllables, each of the syllables having a total frame number of the syllable and plural frame parameters. Each of the frame parameter is formed using an energy amount, a speech pitch period, and 10 Line Spectrum Pair (LSP) speech parameters. Thereafter, each LSP speech parameter is encoded using 4 bit Differential Quantization.

Claims

1. A method of encoding synthetic speech, comprising the steps of:

receiving input speech including plural syllables;

creating a speech data base, wherein the speech data base comprises plural data units that each represent corresponding ones of the plural syllables, each of the plural data units having a total frame number and plural frame parameters;

forming each of the plural frame parameters to include an energy amount, a speech pitch period, and plural LSP speech parameters, based on the plural syllables of the input speech; and

encoding each of the plural LSP speech parameters using Differential Quantization.

2. A method according to claim 1, wherein the speech data base creating step includes creating a data base having data units representing at least 1200 Chinese single syllables.

3. A method according to claim 1, wherein the forming step includes encoding the energy amount using 8 bits.

4. A method according to claim 1, wherein the encoding step includes encoding the speech pitch period using 7 bits.

5. A method according to claim 1, wherein the encoding step includes encoding each of the LSP speech parameters using 4 bits.

6. A method according to claim 1, wherein the encoding step includes encoding each of the frame parameters using 55 bits.

7. A method according to claim 1, wherein the encoding step includes encoding each of the frame parameters to include 10 LSP speech parameters.

8. A method according to claim 1, further including retrieving at least some of the plural data units for conversion to corresponding audio signals.

9. A method according to claim 8, further including comparing the audio signals to corresponding ones of the plural syllables of the input speech.

10. A method according to claim 9, ftrther including adjusting the LSP speech parameters based on a result of the comparison.