Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N7/00—Television systems
  • H04N7/16—Analogue secrecy systems; Analogue subscription systems
  • H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
  • H04N7/17309—Transmission or handling of upstream communications
  • H04N7/17318—Direct or substantially direct transmission and handling of requests
• • G—PHYSICS
  • G06—COMPUTING OR CALCULATING; COUNTING
  • G06F—ELECTRIC DIGITAL DATA PROCESSING
  • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
  • G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
  • G06F3/1454—Digital output to display device ; Cooperation and interconnection of the display device with other functional units involving copying of the display data of a local workstation or window to a remote workstation or window so that an actual copy of the data is displayed simultaneously on two or more displays, e.g. teledisplay
• • G—PHYSICS
  • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
  • G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
  • G09B5/00—Electrically-operated educational appliances
  • G09B5/08—Electrically-operated educational appliances providing for individual presentation of information to a plurality of student stations
  • G09B5/14—Electrically-operated educational appliances providing for individual presentation of information to a plurality of student stations with provision for individual teacher-student communication
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
  • H04L9/40—Network security protocols
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N7/00—Television systems
  • H04N7/10—Adaptations for transmission by electrical cable
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N7/00—Television systems
  • H04N7/14—Systems for two-way working
  • H04N7/15—Conference systems

Landscapes

• Engineering & Computer Science (AREA)
• Signal Processing (AREA)
• Computer Security & Cryptography (AREA)
• Multimedia (AREA)
• Theoretical Computer Science (AREA)
• General Physics & Mathematics (AREA)
• Physics & Mathematics (AREA)
• Computer Networks & Wireless Communication (AREA)
• General Engineering & Computer Science (AREA)
• Human Computer Interaction (AREA)
• Business, Economics & Management (AREA)
• Educational Administration (AREA)
• Educational Technology (AREA)
• Computer And Data Communications (AREA)
• Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
• Management, Administration, Business Operations System, And Electronic Commerce (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=22771978

Family Applications (1)

Country Status (4)

Families Citing this family (17)

Family Cites Families (8)

• 1995
  • 1995-02-15 WO PCT/US1995/002017 patent/WO1995024796A1/en not_active Ceased
  • 1995-02-15 JP JP7523469A patent/JPH09510065A/en not_active Ceased
  • 1995-02-15 EP EP95910291A patent/EP0749661A1/en not_active Withdrawn
  • 1995-02-15 AU AU18461/95A patent/AU1846195A/en not_active Abandoned

Also Published As

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