GB2173078A - Method for performing speech-detection in scpc systems - Google Patents
Method for performing speech-detection in scpc systemsInfo
- Publication number
- GB2173078A GB2173078A GB08601284A GB8601284A GB2173078A GB 2173078 A GB2173078 A GB 2173078A GB 08601284 A GB08601284 A GB 08601284A GB 8601284 A GB8601284 A GB 8601284A GB 2173078 A GB2173078 A GB 2173078A
- Authority
- GB
- United Kingdom
- Prior art keywords
- speech
- detection
- detector
- carrier
- noise
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/204—Multiple access
- H04B7/208—Frequency-division multiple access [FDMA]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
A method to realize the speech-detection in SCPC (Single Channel Per Carrier) satellite-communication systems, where the speech-detection is based on the evaluation of PCM-coded samples that way that the channel-carrier is enabled to be transmitted, if MA number of consecutive samples exceed the speech-treshold. On detecting noise, i.e. if the above condition is not met, and the hangover-time of the detector elapsed, an in double sense adaptive noise- and speech-treshold adjustment process is initiated. In case the length of the activating sample-burst is less, than the - for speech typical minimal - segment-length, i.e. the detector was probably activated by noise, then the value of the detector-hangover-time is chosen conveniently to be shorter, than in case of speech. By the help of this idea the duration of false carrier-transmission is minimized, and a considerable quantity of valuable satellite-energy is saved.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
HU842006A HU190304B (en) | 1984-05-24 | 1984-05-24 | Method for implementing speech detection of satellite communication systems of individual speech channel with fix or random marking-out of the carrier |
PCT/HU1985/000033 WO1985005515A1 (en) | 1984-05-24 | 1985-05-24 | Method for performing speech-detection in scpc systems |
Publications (3)
Publication Number | Publication Date |
---|---|
GB8601284D0 GB8601284D0 (en) | 1986-02-26 |
GB2173078A true GB2173078A (en) | 1986-10-01 |
GB2173078B GB2173078B (en) | 1988-03-23 |
Family
ID=10957259
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB08530834A Expired GB2169776B (en) | 1984-05-24 | 1985-04-26 | A method and circuit arrangement for implementing pcm channel units of scps satellite-communications systems |
GB08601284A Expired GB2173078B (en) | 1984-05-24 | 1985-05-24 | Method for performing speech-detection in scpc systems |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB08530834A Expired GB2169776B (en) | 1984-05-24 | 1985-04-26 | A method and circuit arrangement for implementing pcm channel units of scps satellite-communications systems |
Country Status (5)
Country | Link |
---|---|
JP (1) | JPS61502301A (en) |
DE (1) | DE3590220T1 (en) |
GB (2) | GB2169776B (en) |
HU (1) | HU190304B (en) |
WO (1) | WO1985005515A1 (en) |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1199805B (en) * | 1963-12-09 | 1965-09-02 | Siemens Ag | Method and arrangement for secure data transmission via telephone systems |
DE1803080A1 (en) * | 1968-10-15 | 1970-06-04 | Telefunken Patent | Noise evaluation |
SU522546A1 (en) * | 1975-04-07 | 1976-07-25 | Предприятие П/Я Р-6292 | Device for extracting a signal affected by interference |
SU640433A1 (en) * | 1976-12-27 | 1978-12-30 | Предприятие П/Я А-7306 | Apparatus for transmitting and receiving pulse-modulated signals |
SU756660A1 (en) * | 1978-04-17 | 1980-08-15 | Anatolij A Gladkikh | Device for receiving information with noise suppression |
US4455662A (en) * | 1983-05-25 | 1984-06-19 | Gutleber Frank S | Noise code generator and pulse compression communications system |
SU1115244A1 (en) * | 1983-05-23 | 1984-09-23 | Предприятие П/Я Г-4126 | Device for compensating interference |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3334766A1 (en) * | 1983-09-26 | 1985-04-11 | Siemens AG, 1000 Berlin und 8000 München | MULTIPROCESSOR CENTRAL CONTROL UNIT OF A SWITCHING SYSTEM, IN PARTICULAR TELEPHONE SWITCHING SYSTEM |
SE439208B (en) * | 1983-09-30 | 1985-06-03 | Ericsson Telefon Ab L M | PROGRAMMED CONTROL TELECOMMUNICATIONS |
-
1984
- 1984-05-24 HU HU842006A patent/HU190304B/en not_active IP Right Cessation
-
1985
- 1985-04-26 GB GB08530834A patent/GB2169776B/en not_active Expired
- 1985-05-24 DE DE19853590220 patent/DE3590220T1/en not_active Withdrawn
- 1985-05-24 JP JP60502439A patent/JPS61502301A/en active Pending
- 1985-05-24 GB GB08601284A patent/GB2173078B/en not_active Expired
- 1985-05-24 WO PCT/HU1985/000033 patent/WO1985005515A1/en active Application Filing
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1199805B (en) * | 1963-12-09 | 1965-09-02 | Siemens Ag | Method and arrangement for secure data transmission via telephone systems |
DE1803080A1 (en) * | 1968-10-15 | 1970-06-04 | Telefunken Patent | Noise evaluation |
SU522546A1 (en) * | 1975-04-07 | 1976-07-25 | Предприятие П/Я Р-6292 | Device for extracting a signal affected by interference |
SU640433A1 (en) * | 1976-12-27 | 1978-12-30 | Предприятие П/Я А-7306 | Apparatus for transmitting and receiving pulse-modulated signals |
SU756660A1 (en) * | 1978-04-17 | 1980-08-15 | Anatolij A Gladkikh | Device for receiving information with noise suppression |
SU1115244A1 (en) * | 1983-05-23 | 1984-09-23 | Предприятие П/Я Г-4126 | Device for compensating interference |
US4455662A (en) * | 1983-05-25 | 1984-06-19 | Gutleber Frank S | Noise code generator and pulse compression communications system |
Also Published As
Publication number | Publication date |
---|---|
GB8601284D0 (en) | 1986-02-26 |
HUT37314A (en) | 1985-11-28 |
GB2173078B (en) | 1988-03-23 |
GB2169776A (en) | 1986-07-16 |
GB8530834D0 (en) | 1986-01-22 |
HU190304B (en) | 1986-08-28 |
DE3590220T1 (en) | 1986-05-15 |
GB2169776B (en) | 1988-09-01 |
JPS61502301A (en) | 1986-10-09 |
WO1985005515A1 (en) | 1985-12-05 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19930524 |