FR1438587A - Method for obtaining a digital representation of a normal conversation - Google Patents
Method for obtaining a digital representation of a normal conversationInfo
- Publication number
- FR1438587A FR1438587A FR11897A FR11897A FR1438587A FR 1438587 A FR1438587 A FR 1438587A FR 11897 A FR11897 A FR 11897A FR 11897 A FR11897 A FR 11897A FR 1438587 A FR1438587 A FR 1438587A
- Authority
- FR
- France
- Prior art keywords
- speech
- data processing
- signal
- fundamental frequency
- processing unit
- 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
Links
- 238000001228 spectrum Methods 0.000 abstract 3
- 230000005540 biological transmission Effects 0.000 abstract 1
- 238000005070 sampling Methods 0.000 abstract 1
Classifications
-
- 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
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
-
- 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
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/02—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using spectral analysis, e.g. transform vocoders or subband vocoders
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Computational Linguistics (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Human Computer Interaction (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
- Analogue/Digital Conversion (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
Abstract
1,078,829. Vocoders. INTERNATIONAL BUSINESS MACHINES CORPORATION. March 29, 1965 [April 6, 1964], No. 13170/65. Heading H4R. In a vocoder system each spectrum channel is sampled once per cycle of the fundamental frequency of the speech signal and the resulting signals transmitted in digital form. Fig. 1 shows a preferred embodiment in which speech from a microphone M is divided into a number of frequency bands by band-pass filters BP the signals from which are rectified by rectifiers G and passed through low-pass filters TP 1 to form analogue signals corresponding to the variations in energy of the individual frequency bands of the original speech. The speech is also fed through a low-pass filter TP 2 to a zero crossing detector ND to develop a pulse at the fundamental frequency of the speech. The fundamental frequency pulse is fed through a delay unit VZ, comprising e.g. cascaded monostable switching circuits, to synchronize the signal with the spectrum signals, before the signal is applied to a data processing unit EDV. The data processing unit controls the sampling switch S so that each spectrum channel is sampled one per pitch pulse. The resulting samples are fed via an analogue digital converter to the data processing system EDV for storage and subsequent transmission. The fundamental frequency signal is also digitized in the data processing unit by a counter.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1964J0025599 DE1206027C2 (en) | 1964-04-06 | 1964-04-06 | Process for obtaining a digitized representation of natural language |
Publications (1)
Publication Number | Publication Date |
---|---|
FR1438587A true FR1438587A (en) | 1966-05-13 |
Family
ID=7202295
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR11897A Expired FR1438587A (en) | 1964-04-06 | 1965-04-05 | Method for obtaining a digital representation of a normal conversation |
Country Status (6)
Country | Link |
---|---|
CH (1) | CH433794A (en) |
DE (1) | DE1206027C2 (en) |
FR (1) | FR1438587A (en) |
GB (1) | GB1078829A (en) |
NL (1) | NL6504102A (en) |
SE (1) | SE316808B (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10122655C2 (en) * | 2001-05-10 | 2003-06-12 | Sms Meer Gmbh | Drawing machine for drawing elongated material |
-
1964
- 1964-04-06 DE DE1964J0025599 patent/DE1206027C2/en not_active Expired
-
1965
- 1965-03-29 CH CH430665A patent/CH433794A/en unknown
- 1965-03-29 GB GB1317065A patent/GB1078829A/en not_active Expired
- 1965-04-01 NL NL6504102A patent/NL6504102A/en unknown
- 1965-04-05 FR FR11897A patent/FR1438587A/en not_active Expired
- 1965-04-06 SE SE444665A patent/SE316808B/xx unknown
Also Published As
Publication number | Publication date |
---|---|
NL6504102A (en) | 1965-10-07 |
DE1206027B (en) | 1965-12-02 |
CH433794A (en) | 1967-04-15 |
GB1078829A (en) | 1967-08-09 |
DE1206027C2 (en) | 1973-05-10 |
SE316808B (en) | 1969-11-03 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE3373856D1 (en) | Direct digital to digital sampling rate conversion method and apparatus | |
ATE86415T1 (en) | DIGITAL POLYPHASE FILTER BANK WITH MAXIMUM CLOCK REDUCTION. | |
GB796677A (en) | Improvements in or relating to circuits for the analysis of speech currents | |
GB1068282A (en) | Speech waveform modification | |
DE3370219D1 (en) | Digital data detecting apparatus | |
US2983872A (en) | Signal-translating apparatus | |
FR1438587A (en) | Method for obtaining a digital representation of a normal conversation | |
GB978303A (en) | Improvements in or relating to means for processing signals composed of components of different frequencies | |
GB918941A (en) | Apparatus for deriving pitch signals from a speech wave | |
ES293278A1 (en) | Converter for conversion between analogue and digital signal | |
ES345128A1 (en) | Signalling system using time-division-multiplex | |
US3381091A (en) | Apparatus for determining the periodicity and aperiodicity of a complex wave | |
FR2050972A5 (en) | ||
GB1501874A (en) | Telecommunications apparatus | |
FR1415553A (en) | Improvements to voice analysis systems | |
GB1059015A (en) | Improvements in analysers for acoustic signals | |
US3116374A (en) | Voice bandwidth reduction transmission system | |
GB1217610A (en) | A process and device for identifying frequencies by logical circuits | |
GB1334177A (en) | Vocoder excitation system | |
GB1192215A (en) | Data Transmission Apparatus. | |
GB1048747A (en) | Apparatus for sampling and analysing a complex pattern | |
SU953658A1 (en) | Speech signal formant amplitude and frequency analyzer | |
Welch et al. | Formant extraction hardware using adaptive linear predictive coding | |
JPS57197644A (en) | Data compressing device | |
GB1087305A (en) | Improvements in vocoders |