GB1459341A - Voice modification apparatus - Google Patents

Voice modification apparatus

Info

Publication number
GB1459341A
GB1459341A GB417174A GB417174A GB1459341A GB 1459341 A GB1459341 A GB 1459341A GB 417174 A GB417174 A GB 417174A GB 417174 A GB417174 A GB 417174A GB 1459341 A GB1459341 A GB 1459341A
Authority
GB
United Kingdom
Prior art keywords
switch
noise
modification apparatus
signal
khz
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB417174A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
UK Secretary of State for Defence
Original Assignee
UK Secretary of State for Defence
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by UK Secretary of State for Defence filed Critical UK Secretary of State for Defence
Priority to GB417174A priority Critical patent/GB1459341A/en
Publication of GB1459341A publication Critical patent/GB1459341A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G9/00—Combinations of two or more types of control, e.g. gain control and tone control
    • H03G9/02—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/003—Changing voice quality, e.g. pitch or formants
    • G10L21/007—Changing voice quality, e.g. pitch or formants characterised by the process used
    • G10L21/013—Adapting to target pitch
    • G10L2021/0135—Voice conversion or morphing

Landscapes

  • Engineering & Computer Science (AREA)
  • Computational Linguistics (AREA)
  • Quality & Reliability (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Toys (AREA)

Abstract

1459341 Voice modification apparatus DEFENCE SECRETARY OF STATE FOR 14 Jan 1975 [29 Jan 1974] 04171/74 HeadingH4R Voice modification apparatus includes distorting means to introduce any one of a number of different modes of distortion into an electrical signal, a noise generator to introduce any one of a number of predetermined levels of noise into the signal and a switch to select a number of different combinations of distortion mode, noise level, and gain or attenuation into the signal. In one embodiment, Fig. 1, the switches 3a, 3b, switch in different combinations of octave band pass filters 4a, 4b, 4c, 4d into the signal path, the filters being centred on 500 Hz, 1 kHz, 2 kHz and 4 kHz respectively, switch 3c introduces different levels of noise from a noise generator 6 and switch 3d introduced different degrees of attenuation into the signal path. The switches 3a, 3b, 3c, and 3d are ganged together. A further switch 9a, 9b can be operated to bypass the modification apparatus and switch off the power supply thereto. In an alternative form, Fig. 2 (not shown) the filters are replaced by a frequence doubler, a clipper, and a low pass filter.
GB417174A 1974-01-29 1974-01-29 Voice modification apparatus Expired GB1459341A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB417174A GB1459341A (en) 1974-01-29 1974-01-29 Voice modification apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB417174A GB1459341A (en) 1974-01-29 1974-01-29 Voice modification apparatus

Publications (1)

Publication Number Publication Date
GB1459341A true GB1459341A (en) 1976-12-22

Family

ID=9772050

Family Applications (1)

Application Number Title Priority Date Filing Date
GB417174A Expired GB1459341A (en) 1974-01-29 1974-01-29 Voice modification apparatus

Country Status (1)

Country Link
GB (1) GB1459341A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2306088A (en) * 1995-10-09 1997-04-23 London Regional Transport Public address system speech training

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2306088A (en) * 1995-10-09 1997-04-23 London Regional Transport Public address system speech training

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee