ES467884A1 - Electrical signal encoder and decoder equipment contained in a predetermined frequency band. (Machine-translation by Google Translate, not legally binding) - Google Patents
Electrical signal encoder and decoder equipment contained in a predetermined frequency band. (Machine-translation by Google Translate, not legally binding)Info
- Publication number
- ES467884A1 ES467884A1 ES467884A ES467884A ES467884A1 ES 467884 A1 ES467884 A1 ES 467884A1 ES 467884 A ES467884 A ES 467884A ES 467884 A ES467884 A ES 467884A ES 467884 A1 ES467884 A1 ES 467884A1
- Authority
- ES
- Spain
- Prior art keywords
- portions
- translation
- electrical signals
- frequency band
- machine
- 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 abstract 1
- 230000000295 complement effect Effects 0.000 abstract 1
- 238000005070 sampling Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K1/00—Secret communication
- H04K1/06—Secret communication by transmitting the information or elements thereof at unnatural speeds or in jumbled order or backwards
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Electrophonic Musical Instruments (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Coding and decoding equipment of electrical signals comprised in a predetermined frequency band, suitable to be connected between means for generating and receiving said electrical signals and means for changing said encoded signals with at least one second encoding and decoding equipment, characterized by the fact to comprise a transmission and coding circuit and a reception and decoding circuit for said signals, with operation enabled so as to complement, with electronic switching means, said circuits comprising primary means for simultaneously memorizing portions received consecutively from said electrical signals, secondary means, suitable to enable the operation of said primary means, to memorize said portions consecutively and to send said portions, in a different order, to said means of change or said means to receive said signal is, and third means suitable to allow the memorization of said portions of electrical signals in said primary means following a fixed sampling frequency or following two or more frequencies, variables with a predetermined order. (Machine-translation by Google Translate, not legally binding)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH322277A CH621899A5 (en) | 1977-03-15 | 1977-03-15 | Encoding and decoding apparatus for the protection of the secrecy of communications |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES467884A1 true ES467884A1 (en) | 1978-11-01 |
Family
ID=4251280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES467884A Expired ES467884A1 (en) | 1977-03-15 | 1978-03-15 | Electrical signal encoder and decoder equipment contained in a predetermined frequency band. (Machine-translation by Google Translate, not legally binding) |
Country Status (4)
| Country | Link |
|---|---|
| CH (1) | CH621899A5 (en) |
| ES (1) | ES467884A1 (en) |
| FI (1) | FI72240C (en) |
| IT (1) | IT1094268B (en) |
-
1977
- 1977-03-15 CH CH322277A patent/CH621899A5/en not_active IP Right Cessation
-
1978
- 1978-02-27 FI FI780648A patent/FI72240C/en not_active IP Right Cessation
- 1978-03-10 IT IT21089/78A patent/IT1094268B/en active
- 1978-03-15 ES ES467884A patent/ES467884A1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| IT7821089A0 (en) | 1978-03-10 |
| FI72240B (en) | 1986-12-31 |
| FI780648A (en) | 1978-09-16 |
| FI72240C (en) | 1987-04-13 |
| IT1094268B (en) | 1985-07-26 |
| CH621899A5 (en) | 1981-02-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FD1A | Patent lapsed |
Effective date: 19971001 |