GB1358355A - Automatic telegraphy monitoring device - Google Patents
Automatic telegraphy monitoring deviceInfo
- Publication number
- GB1358355A GB1358355A GB3058672A GB3058672A GB1358355A GB 1358355 A GB1358355 A GB 1358355A GB 3058672 A GB3058672 A GB 3058672A GB 3058672 A GB3058672 A GB 3058672A GB 1358355 A GB1358355 A GB 1358355A
- Authority
- GB
- United Kingdom
- Prior art keywords
- signal
- audio
- stop
- pulses
- gate
- 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
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Television Signal Processing For Recording (AREA)
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
- Studio Circuits (AREA)
Abstract
1358355 Television monitoring arrangement T OHSAWA and M KARITA 29 June 1972 [3 July 1971] 30586/72 Heading H4F [Also in Division G4] A broadcasting monitoring device detects an audio or visual start and stop signal and between these signals filters the audio signal into predetermined frequency ranges, integrates and converts to a digital value the signal into each range and then codes and stores the values. The signals may be radio or TV and may be broadcast or transmitted by cable. The audio start signal is preferably two 20 nS duration pulses separated by and followed by a 20 nS portion of no signal inserted into the audio signal (Fig. 1, not shown) and the stop signal may be similar but with 10 nS duration. The visual signals are preferably white horizontal bars at predetermined positions on an otherwise black frame (Fig. 5, not shown). The system of Fig. 3 uses audio start and stop pulses on a TV signal. The audio signal is extracted from the audio detector 10 of a television receiver TV and is fed to start detector circuit A, stop detector circuit B and gate G. In start circuit A, the signal is band pass filtered at 13s at the frequency corresponding to 20 nS pulses and is shaped and rectified at 14s. The detection circuits comprise gate 15s, clock 16s, mark and space timing circuit 17s, 18s respectively and pattern detector 19s. These detect the start signal and when the full, correct start pattern has been received, an output is generated which sets bi-stable 20 and enables gate G. Stop circuit B functions in an identical manner; its output setting monostable 21 which resets bi-stable 20 and closes gate G. The audio signal passing through G is divided into channels 1 to n by filters 22. The signals are integrated at 23 to a level determined by Schmidt trigger 24 which then resets the integrator and supplies a pulse to counter 25. The counts in counters 25 after the stop signal are representative of the energy in each frequency channel and are characteristic of the signal. They are read into register D and then transferred by a pulse from monostable 21 into store E. When the start and stop pulses are video signals, the horizontal sync. pulses are integrated during each frame. When the integrated voltages exceeds a threshold, the arrival of the video voltage associated with the white bar opens a gate and the audio signal is again fed to the filter, integrator and counter circuits.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4848771A JPS535492B1 (en) | 1971-07-03 | 1971-07-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1358355A true GB1358355A (en) | 1974-07-03 |
Family
ID=12804729
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3058672A Expired GB1358355A (en) | 1971-07-03 | 1972-06-29 | Automatic telegraphy monitoring device |
Country Status (5)
Country | Link |
---|---|
JP (1) | JPS535492B1 (en) |
CA (1) | CA965150A (en) |
DE (1) | DE2232344C3 (en) |
FR (1) | FR2144740B1 (en) |
GB (1) | GB1358355A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150256876A1 (en) * | 2014-03-06 | 2015-09-10 | Verizon Patent And Licensing Inc. | Providing second screen content based on a frequency code |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4025851A (en) * | 1975-11-28 | 1977-05-24 | A.C. Nielsen Company | Automatic monitor for programs broadcast |
-
1971
- 1971-07-03 JP JP4848771A patent/JPS535492B1/ja active Pending
-
1972
- 1972-06-29 GB GB3058672A patent/GB1358355A/en not_active Expired
- 1972-06-30 CA CA146,211A patent/CA965150A/en not_active Expired
- 1972-07-01 DE DE19722232344 patent/DE2232344C3/en not_active Expired
- 1972-07-03 FR FR7224001A patent/FR2144740B1/fr not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150256876A1 (en) * | 2014-03-06 | 2015-09-10 | Verizon Patent And Licensing Inc. | Providing second screen content based on a frequency code |
US9681171B2 (en) * | 2014-03-06 | 2017-06-13 | Verizon Patent And Licensing Inc. | Providing second screen content based on a frequency code |
Also Published As
Publication number | Publication date |
---|---|
CA965150A (en) | 1975-03-25 |
DE2232344B2 (en) | 1974-11-21 |
DE2232344C3 (en) | 1975-07-17 |
FR2144740B1 (en) | 1977-07-22 |
DE2232344A1 (en) | 1973-03-08 |
JPS535492B1 (en) | 1978-02-28 |
FR2144740A1 (en) | 1973-02-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
ES8702761A1 (en) | Multi-system television receiver. | |
US4340906A (en) | Video signal coding by video signal polarity reversal on the basis of brightness level comparison | |
GB2078051A (en) | Coding audio and video signals | |
US4620227A (en) | Data decoder | |
GB1197541A (en) | Facsimile Multiplex System | |
US3924059A (en) | Pay television systems | |
US4454543A (en) | Dynamic video scrambling | |
GB1532405A (en) | Television systems | |
GB1536851A (en) | Video carrier wave defect detection and compensation | |
CA1040300A (en) | Digital synchronizing system | |
GB1409716A (en) | Television systems | |
GB1358355A (en) | Automatic telegraphy monitoring device | |
US4447828A (en) | Phase change dynamic scrambling | |
GB1448898A (en) | Vtr signal discriminating apparatus in a television receiver | |
US3867010A (en) | Vertical interval reference signal extraction circuit arrangement | |
GB1377021A (en) | Signal receiver for receiving signals of different frequency | |
GB1107360A (en) | Electronic picture display system | |
CA1321830C (en) | Immunity to channel distortions of mac signal | |
GB1372821A (en) | Apparatus for receiving coded signals | |
GB1236510A (en) | Improvements in or relating to signal receiving systems | |
US4220970A (en) | Circuit arrangement for identifying television signals | |
US5784121A (en) | Vertical synchronisation signal detector | |
JPS54161231A (en) | Color television receiver | |
EP0127040B1 (en) | Television receiver with a group delay time correction circuit | |
KR910001652B1 (en) | Television synchronization signal detecting method |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |