GB1151270A - Signal Transmission Systems - Google Patents
Signal Transmission SystemsInfo
- Publication number
- GB1151270A GB1151270A GB4711566A GB4711566A GB1151270A GB 1151270 A GB1151270 A GB 1151270A GB 4711566 A GB4711566 A GB 4711566A GB 4711566 A GB4711566 A GB 4711566A GB 1151270 A GB1151270 A GB 1151270A
- Authority
- GB
- United Kingdom
- Prior art keywords
- signal
- speech
- frequency components
- power level
- level
- 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
- 230000008054 signal transmission Effects 0.000 title 1
- 230000005540 biological transmission Effects 0.000 abstract 1
- 238000001228 spectrum Methods 0.000 abstract 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
-
- 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
-
- 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)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (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)
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
- Transmitters (AREA)
Abstract
1,151,270. Transmission systems; pulse modulation systems. INTERNATIONAL BUSINESS MACHINES CORP. 21 Oct., 1966 [14 Jan., 1966], No. 47115/66. Addition to 1,039,822. Headings H4L and H4R. A receiver for use with the transmitter of Specification 1,039,822, in which a speech signal is added to a constant level high frequency signal and the resultant signal limited to obtain a rectangular waveform of constant amplitude having a constant total power level but a power-frequency distribution the same as that of the sum signal, separates the received signal into the speech frequency components and reference frequency components by filters 72 and 74, amplifies the reference frequency components in amplifier 76, adds the resulting signal to the speech frequency components in adder 78 and then limits the sum signal in limiter 80, from the output of which the speech signal components are separated by filter 82. The arrangement, by amplifying the reference signal variations relative to those of the speech signal and then limiting in a similar manner to that used at the transmitter, tends to vary the power level of the speech signal inversely relative the level of the received reference signal and so tends to restore the speech spectrum to its original power level, the accuracy with which it does so depending on the gain of the amplifier 76 which should be as high as is practicable.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US26589063A | 1963-03-18 | 1963-03-18 | |
| US532028A US3327063A (en) | 1966-01-14 | 1966-01-14 | Transmission of information in powercoded bipolar waveforms |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1151270A true GB1151270A (en) | 1969-05-07 |
Family
ID=26951481
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB928564A Expired GB1039822A (en) | 1963-03-18 | 1964-03-05 | Signal transmission system |
| GB4711566A Expired GB1151270A (en) | 1963-03-18 | 1966-10-21 | Signal Transmission Systems |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB928564A Expired GB1039822A (en) | 1963-03-18 | 1964-03-05 | Signal transmission system |
Country Status (3)
| Country | Link |
|---|---|
| DE (2) | DE1222119C2 (en) |
| FR (1) | FR93357E (en) |
| GB (2) | GB1039822A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4545065A (en) * | 1982-04-28 | 1985-10-01 | Xsi General Partnership | Extrema coding signal processing method and apparatus |
-
1964
- 1964-03-05 GB GB928564A patent/GB1039822A/en not_active Expired
- 1964-03-18 DE DE1964J0025476 patent/DE1222119C2/en not_active Expired
-
1966
- 1966-10-21 GB GB4711566A patent/GB1151270A/en not_active Expired
- 1966-12-21 DE DE19661487342 patent/DE1487342B2/en active Pending
-
1967
- 1967-01-11 FR FR06008287A patent/FR93357E/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE1222119B (en) | 1966-08-04 |
| GB1039822A (en) | 1966-08-24 |
| DE1487342B2 (en) | 1973-06-20 |
| DE1487342A1 (en) | 1969-03-27 |
| DE1222119C2 (en) | 1974-03-07 |
| FR93357E (en) | 1969-03-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |