GB2186160B - Method and apparatus for processing speech signals - Google Patents

Method and apparatus for processing speech signals

Info

Publication number
GB2186160B
GB2186160B GB8700378A GB8700378A GB2186160B GB 2186160 B GB2186160 B GB 2186160B GB 8700378 A GB8700378 A GB 8700378A GB 8700378 A GB8700378 A GB 8700378A GB 2186160 B GB2186160 B GB 2186160B
Authority
GB
United Kingdom
Prior art keywords
signal
speech
normalization
processing
modified
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
GB8700378A
Other versions
GB8700378D0 (en
GB2186160A (en
Inventor
Jaswant Raj Jain
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.)
Racal Data Communications Inc
Original Assignee
Racal Data Communications Inc
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 Racal Data Communications Inc filed Critical Racal Data Communications Inc
Publication of GB8700378D0 publication Critical patent/GB8700378D0/en
Publication of GB2186160A publication Critical patent/GB2186160A/en
Application granted granted Critical
Publication of GB2186160B publication Critical patent/GB2186160B/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/66—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for reducing bandwidth of signals; for improving efficiency of transmission
    • 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
    • G10L21/04—Time compression or expansion
    • 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
    • G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
    • G10L25/90—Pitch determination of speech signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computational Linguistics (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Quality & Reliability (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

A method and apparatus for processing speech signals is disclosed which is applicable to a variety of speech processing including narrowband, mediumband and wideband coding. The speech signal is modified by a normalization process using the envelope of the speech signal such that the modified signal will have more desirable characteristics as seen by the intended processing algorithm (30), eg narrower bandwidth. The modification is achieved by a point-by-point division (normalization) (26) of the signal by an amplitudes function (AF), which is obtained from lowpass filtering (16) and magnitude of the signal. Several examples of normalized signal are presented both for short and long term normalization. Application to pitch detection and speech coding is described. <IMAGE>
GB8700378A 1986-01-24 1987-01-08 Method and apparatus for processing speech signals Expired GB2186160B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US82298286A 1986-01-24 1986-01-24

Publications (3)

Publication Number Publication Date
GB8700378D0 GB8700378D0 (en) 1987-02-11
GB2186160A GB2186160A (en) 1987-08-05
GB2186160B true GB2186160B (en) 1989-11-01

Family

ID=25237469

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8700378A Expired GB2186160B (en) 1986-01-24 1987-01-08 Method and apparatus for processing speech signals

Country Status (2)

Country Link
JP (1) JPH0198000A (en)
GB (1) GB2186160B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03132228A (en) * 1989-10-18 1991-06-05 Victor Co Of Japan Ltd System for encoding/decoding orthogonal transformation signal
DK46493D0 (en) * 1993-04-22 1993-04-22 Frank Uldall Leonhard METHOD OF SIGNAL TREATMENT FOR DETERMINING TRANSIT CONDITIONS IN AUDITIVE SIGNALS
JP2015191102A (en) * 2014-03-28 2015-11-02 パイオニア株式会社 acoustic device and signal processing method

Also Published As

Publication number Publication date
JPH0198000A (en) 1989-04-17
GB8700378D0 (en) 1987-02-11
GB2186160A (en) 1987-08-05

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20000108