GB969049A - Improvements in or relating to speech transmission systems - Google Patents
Improvements in or relating to speech transmission systemsInfo
- Publication number
- GB969049A GB969049A GB4282761A GB4282761A GB969049A GB 969049 A GB969049 A GB 969049A GB 4282761 A GB4282761 A GB 4282761A GB 4282761 A GB4282761 A GB 4282761A GB 969049 A GB969049 A GB 969049A
- Authority
- GB
- United Kingdom
- Prior art keywords
- signal
- pitch
- channel
- nov
- relating
- 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
- 230000005540 biological transmission Effects 0.000 title 1
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
- H04B1/667—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 using a division in frequency subbands
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Health & Medical Sciences (AREA)
- Computational Linguistics (AREA)
- Human Computer Interaction (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
Abstract
969,049. Vocoders. TELEFUNKEN PATENTVERWERTUNGS-.G.m.b.H. Nov. 30, 1961 [Nov. 30, 1960], No. 42827/61. Heading H4R. The pitch signal for a channel vocoder is derived by passing the speech signal from microphone 1, Fig. 2, through a 300 to 600 c.p.s. band-pass filter 27, amplitude limiter 28 and a filter 29 which passes only the fundamental component of the limited signal. At the receiver the pitch signal is added to a noise signal from generator 33 and the combined signal limited in limiter 32 and applied to the inputs of channel filters 10 to 15, the outputs from which are modulated by ring modulators 16 to 21 before being amplified and reproduced by reproducer 22. The channel signals and pitch signals are transmitted by a pulse code modulator.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DET19357A DE1130860B (en) | 1960-11-30 | 1960-11-30 | Method for saving channel capacity when transmitting voice signals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB969049A true GB969049A (en) | 1964-09-09 |
Family
ID=7549288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4282761A Expired GB969049A (en) | 1960-11-30 | 1961-11-30 | Improvements in or relating to speech transmission systems |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE1130860B (en) |
| GB (1) | GB969049A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0255524A1 (en) * | 1986-01-03 | 1988-02-10 | Motorola Inc | Method and apparatus for synthesizing speech without voicing or pitch information. |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2928902A (en) * | 1957-05-14 | 1960-03-15 | Vilbig Friedrich | Signal transmission |
-
1960
- 1960-11-30 DE DET19357A patent/DE1130860B/en active Pending
-
1961
- 1961-11-30 GB GB4282761A patent/GB969049A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0255524A1 (en) * | 1986-01-03 | 1988-02-10 | Motorola Inc | Method and apparatus for synthesizing speech without voicing or pitch information. |
| EP0255524A4 (en) * | 1986-01-03 | 1988-06-23 | Motorola Inc | Method and apparatus for synthesizing speech without voicing or pitch information. |
| US5133010A (en) * | 1986-01-03 | 1992-07-21 | Motorola, Inc. | Method and apparatus for synthesizing speech without voicing or pitch information |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1130860B (en) | 1962-06-07 |
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