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| SECTION G– PHYSICS |
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| G 10 | MUSICAL INSTRUMENTS; ACOUSTICS |
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| G 10 L | SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION (measurement of sound waves in general G 01 H; frequency spectrum analysis of electric signals in general G 01 R 23/16; electrophonic musical instruments G 10 H; sound-producing devices other than musical instruments G 10 K; information storage, e.g. sound storage, G 11; coding, decoding or code conversion, in general H 03 M) |
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3/ | 00 | Details of devices which are not related to a specific method of analysis or synthesis [4] |
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3/ | 02 | . | Devices for modifying at least one characteristic of the speech waves, e.g. amplitude, basic frequency, frequency spectrum, duration (audiometry A 61 B 5/12; modifications of communication systems to reduce bandwidth of signals H 04 B 1/66) [4] |
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5/ | 00 | Methods or devices for speech analysis, synthesis or recognition using more than one specific type of device or method covered by group G 10 L 7/00 or G 10 L 9/00 [4] |
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5/ | 02 | . | Speech synthesis from stored data [4] |
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5/ | 04 | . | . | the stored data being speech elements, e.g. phonemes [4] |
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5/ | 06 | . | for recognition or speaker identification [4] |
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7/ | 00 | Methods or devices using the amplitude-frequency representation of speech waves [4] |
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7/ | 02 | . | for analysis or synthesis [4] |
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7/ | 04 | . | . | using filter banks [4] |
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7/ | 06 | . | . | using Fourier or Walsh transformation (computers for forming Fourier or Walsh transformations G 06 F 17/14, G 06 G 7/19) [4] |
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7/ | 08 | . | for speech recognition, for speaker identification, for controlling machines by voice, e.g. controlling typewriters [4] |
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7/ | 10 | . | for displaying speech waves; Spectrographs (G 10 L 7/08 takes precedence) [4] |
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9/ | 00 | Methods or devices using other specified techniques (computers in general G 06) |
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9/ | 02 | . | using formants identification or reconstruction (G 10 L 9/04 takes precedence) [4] |
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9/ | 04 | . | using formants extraction from characteristics of the spectral envelope [4] |
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9/ | 06 | . | . | for recognition, for speaker identification or for controlling machines by voice [4] |
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9/ | 08 | . | using correlation techniques [4] |
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9/ | 10 | . | using simulation of the vocal and aural systems [4] |
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9/ | 12 | . | using zero crossing techniques (G 10 L 9/02 takes precedence) [4] |
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9/ | 14 | . | using predictive techniques [4] |
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9/ | 16 | . | using orthogonal functions [4] |
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9/ | 18 | . | using digital techniques (G 10 L 9/02 to G 10 L 9/16 take precedence) [4] |
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9/ | 20 | . | using non-electrical techniques [4] |
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