New types of media

(1) CATV (Cable TeleVision)
Than a regular user of the antenna, CATV operators, excellent high-sensitivity reception antenna to repair the quality of broadcast television signals to subscribers' homes using broadband transmission line such as coaxial cable transmission services that
Often transfer large number of broadcast channels and interactive services available
Came to think the solution is for poor reception areas, but in recent years the development of Internet access services using the excess bandwidth of coaxial cable, and
Components: subscriber terminal equipment (Terminal Equipment), the head-end devices (Head-End System), and transferred to

(2) CCTV (Closed Circuit TeleVision)
Specific only to the recipient of service with the aim of a closed-circuit system
The camera is connected to a television monitor, so the signal does not propagate into the air
Extend the conventional closed-circuit system of functional limitations in the field of information management, computer network, multimedia technology background and
An industrial television (TV) or a dedicated television referred to as

(3) HDTV (High Definition TeleVision: high-definition TV)
Complementary technology to the problems of the existing television high-definition television, greatly increasing the number of lines and the total number of pixels, screen aspect ratio, etc.
Aspect ratio: 16:9
Number of lines: existing NTSC format (525/625) of the approximately 2-fold

(4) Teletext (Teletext)
+ Broadcast TV receiver + Data Bank System
Television propagation of extremely short intervals using the one-way system to deliver a multi-character information broadcasting
Television propagated the unused portion of the system that sends the characters or shapes at the same time as regular television broadcasts program
Such as information retrieval, message passing, and electronic data processing services, transaction processing services, remote monitoring services

(5) Teletex
Height of document memory mutual communication services
In addition to editing, storage and communication capabilities, and use a wide range of high-quality (error correction) and the character of the Beach Office document handler to use the terminal
Available public data networks such as the telephone network, the connection

(6) Videotex
TV receivers + + Phone Data Bank
Search for the required information in the user information that is accumulated in the Information Center computer system, a TV award or on the PC screen that displays characters and shapes

(7) Facsimile (FAX)
Decomposed into pixel stills, letters, photos, etc., into an electrical signal by changing transfer, the receiving points won and it looks like the way to obtain a permanent record video

(8) video conferencing system (VCS; Video Conference System)
Created to conduct meetings, such as video and sound through the reflection on the TV screen installed in the indoor people away from each other over long distances between their respective systems

(9) automatic training system (CAI Computer Aided Instruction)
Learning program computer applications automatically education system, to be held by the individual education while teaching many people using a computer at the same time to adapt to the individual's aptitude or understanding