GB1454158A - Speech compressor - Google Patents
Speech compressorInfo
- Publication number
- GB1454158A GB1454158A GB979275A GB979275A GB1454158A GB 1454158 A GB1454158 A GB 1454158A GB 979275 A GB979275 A GB 979275A GB 979275 A GB979275 A GB 979275A GB 1454158 A GB1454158 A GB 1454158A
- Authority
- GB
- United Kingdom
- Prior art keywords
- amplitude
- asin
- march
- quadrature components
- output
- 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
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G7/00—Volume compression or expansion in amplifiers
- H03G7/002—Volume compression or expansion in amplifiers in untuned or low-frequency amplifiers, e.g. audio amplifiers
-
- 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
- H04B1/62—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 providing a predistortion of the signal in the transmitter and corresponding correction in the receiver, e.g. for improving the signal/noise ratio
- H04B1/64—Volume compression or expansion arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
Abstract
1454158 Amplitude compressors J A ADCOCK 10 March 1975 [25 March 1974] 9792/75 Heading H4R The amplitude of a signal, represented by Asin#, is compressed by generating quadrature components Asin#, Acos# from the input, squaring and adding then square-rooting to extract "A", and dividing one of the quadrature components by "A" to produce a unit amplitude output sin#. An extra component "a" may be added to "A" to adjust the output amplitude to A/(A + a).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU702774 | 1974-03-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1454158A true GB1454158A (en) | 1976-10-27 |
Family
ID=3697623
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB979275A Expired GB1454158A (en) | 1974-03-25 | 1975-03-10 | Speech compressor |
Country Status (2)
Country | Link |
---|---|
AU (1) | AU7898175A (en) |
GB (1) | GB1454158A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2424668A1 (en) * | 1978-04-24 | 1979-11-23 | Cit Alcatel | AUTOMATIC GAIN CONTROL CIRCUIT |
-
1974
- 1974-03-25 AU AU78981/75A patent/AU7898175A/en not_active Expired
-
1975
- 1975-03-10 GB GB979275A patent/GB1454158A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2424668A1 (en) * | 1978-04-24 | 1979-11-23 | Cit Alcatel | AUTOMATIC GAIN CONTROL CIRCUIT |
Also Published As
Publication number | Publication date |
---|---|
AU7898175A (en) | 1976-09-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB1219243A (en) | Substituted guanamines | |
GB1514564A (en) | Atomic beam apparatus | |
GB1454158A (en) | Speech compressor | |
SE388956B (en) | VOCODER SYSTEM | |
GB1523909A (en) | Electromagnetic transducer | |
JPS52127224A (en) | Electronicmusical instrument | |
GB1116451A (en) | Method of and apparatus for transmitting energy by pressure oscillations in a fluid | |
JPS5312A (en) | Am receiver | |
GB1498725A (en) | Synchronous demodulator circuit | |
GB1432328A (en) | Generator for tones of a musical scale | |
GB860237A (en) | Improvements in and relating to echo sounding and echo ranging apparatus | |
GB1390285A (en) | Circuit arrangement for deriving output signals from a resistive bridge network | |
JPS5362571A (en) | Electronic watch with stop watch | |
GB1516866A (en) | Method of operating vibrators to produce seismic signals | |
JPS51113595A (en) | Landupan-type vibrator | |
GB1093961A (en) | Improvements relating to stereophonic transmission systems and receivers therefor | |
GB1250393A (en) | ||
GB978742A (en) | A new or improved apparatus for furnishing information as to position of objects | |
GB1427352A (en) | Method for tuning musical instruments | |
FR2293223A1 (en) | Low distortion speech transmission - by adding small amplitude alternating signal to microphone signal before squaring | |
JPS51113594A (en) | Landupan-type vibrator | |
FR2058696A5 (en) | ||
JPS52142464A (en) | Saw tooth wave generating circuit | |
JPS5267593A (en) | Rador equipment | |
FR2237250A1 (en) | Electronic vector handling circuit - provides vector argument from its cartesian components e.g. for compass |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |