G
SECTION G — PHYSICS
  
INSTRUMENTS
 G10
MUSICAL INSTRUMENTS; ACOUSTICS
 G10

Note(s)

  1. This class covers all sound-emitting devices, in general, whether or not they may be considered as being musical.
  2. In this class, the following expression is used with the meaning indicated:
    • "musical instrument" does not exclude devices emitting a single sound signal.
  3. The following Class Index is given in place of subclass indexes, to show the grouping of the elaborations belonging to different subclasses, under the following three fundamental types:
    • wind instruments;
    • string instruments;
    • percussion instruments,
    which relate clearly to the majority of instruments.
  4. There are of course some instruments of which the principle of operation belongs less clearly to one of the three types mentioned in Note (3). They correspond to groups G10D 17/00 or G10K 7/00, G10K 9/00 or G10K 15/04, all the other groups normally finding a definite place.
 G10L
SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION (measurement of sound waves in general G01H; frequency spectrum analysis of electric signals in general G01R 23/16; electrophonic musical instruments G10H; sound-producing devices other than musical instruments G10K; information storage, e.g. sound storage, G11; coding, decoding or code conversion, in general H03M)
 G10L 1/00
( transferred to G10L 3/00-G10L 9/20, G10K 15/00 )
 G10L 3/00
Details of devices which are not related to a specific method of analysis or synthesis  [4]
 G10L 3/02
·  Devices for modifying at least one characteristic of the speech waves, e.g. amplitude, basic frequency, frequency spectrum, duration (audiometry A61B 5/12; modifications of communication systems to reduce bandwidth of signals H04B 1/66)  [4]
 G10L 5/00
Methods or devices for speech analysis, synthesis or recognition using more than one specific type of device or method covered by group G10L 7/00 or G10L 9/00  [4]
 G10L 5/02
·  Speech synthesis from stored data  [4]
 G10L 5/04
·  ·  the stored data being speech elements, e.g. phonemes  [4]
 G10L 5/06
·  for recognition or speaker identification  [4]
 G10L 7/00
Methods or devices using the amplitude-frequency representation of speech waves  [4]
 G10L 7/02
·  for analysis or synthesis  [4]
 G10L 7/04
·  ·  using filter banks  [4]
 G10L 7/06
·  ·  using Fourier or Walsh transformation (computers or forming Fourier or Walsh transformations G06F 15/332, G06G 7/19)  [4]
 G10L 7/08
·  for speech recognition, for speaker identification, for controlling machines by voice, e.g. controlling typewriters  [4]
 G10L 7/10
·  for displaying speech waves; Spectrographs (G10L 7/08 takes precedence)  [4]
 G10L 9/00
Methods or devices using other specified techniques (computers in general G06)  [4]
 G10L 9/02
·  using formants identification or reconstruction (G10L 9/04 takes precedence)  [4]
 G10L 9/04
·  using formants extraction from characteristics of the spectral envelope  [4]
 G10L 9/06
·  ·  for recognition, for speaker identification or for controlling machines by voice  [4]
 G10L 9/08
·  using correlation techniques  [4]
 G10L 9/10
·  using simulation of the vocal and aural systems  [4]
 G10L 9/12
·  using zero crossing techniques (G10L 9/02 takes precedence)  [4]
 G10L 9/14
·  using predictive techniques  [4]
 G10L 9/16
·  using orthogonal functions  [4]
 G10L 9/18
·  using digital techniques (G10L 9/02-G10L 9/16 take precedence)  [4]
 G10L 9/20
·  using non-electrical techniques  [4]