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Personal computer (PC) are an important component of any computing complex, suffice it to say that external devices account for 80-85% of the cost of the entire PC.
The external devices of the PC allow the machine to interact with the external environment: users, control objects and other computers.
External devices include:
• External memory devices (TEQQ) or external memory of the PC;
• user communication tools;
• data entry devices;
• data output devices ;
• means of communication and telecommunications.
User communication tools include video terminals and data input-output devices.
Video monitor (display) is a device that displays data entering and leaving the computer.
Speech I / O devices are among the fastest growing multimedia tools.
A speech input device is an acoustic system with a variety of microphones, “sound mice,” such as sophisticated software that can understand, identify, and encode letters and words that a person pronounces.
A speech output device is a variety of sound synthesizers that are produced through loudspeakers (speakers) connected to a computer or sound speakers that perform the conversion of digital codes into letters and words.
Data input devices include:
• keyboard - a device for manual input of numerical, textual and control information on a PC;
• Graphic tablets (digitizers) - by moving the special indicator (platform) on the tablet to manually enter the graphic data, images, when moving the platform, its coordinates are read and this information is entered into the PC ;
• scanners (reading machines) - for automatic reading of typewritten texts, graphics , pictures, drawings from paper media and input into the PC;
• display devices (graphic manipulators) - to control the cursor movement on the screen to enter graphic information on the display screen and then encode the cursor coordinate and enter it into the PC (joystick - lever, "mouse", trackball - flange ball, light feather, etc.);
Data output devices include:
• printers - a recording device for recording data on paper;
• Graphic viewers (plotters) - to output graphic information (graphics, drawings, pictures) from the PC to the paper carrier.
Communication and telecommunication devices for communication with devices and other means of automation (interface adapters, adapters, digital-analog and analog-to-digital converters, etc.) and for PC communication channels , other computers and computing networks (network interface board, "connections", value transmission multiplexers, modems).
A multimedia tool is a collection of hardware and software tools that allow a person to interact with a computer in a variety of natural environments: sound, video, graphics, text, animation, and so on. . allows you to communicate using.
Multimedia tools include:
speech input and output devices ;
amplifiers, speakers, large video screens, microphones and video cameras, acoustic and video recording systems;
audio and video cards , video capture boards that take an image from a VCR or video camera and insert it into the PC ; already common scanners (because they allow you to automatically enter text and images typed into a computer);
and finally, large-capacity external storage devices on optical discs, often used to record audio and video data.
MULTIMEDIA MEDIA
Multimedia is atype ofcomputer technology that has a variety of physical forms (text, graphics, images, sound, animation, video, etc.) and is available on a variety of media (magnetic). and optical discs, audio and video tapes, etc.) is an area of information use.
Multimedia (Multimedia - muxitlilik)hardware and software package, which itself is a very different environment: audio, video, graphics, text, animation and b. allows you to communicate with a computer using.
Multimedia provides the user with great opportunities to create a fantasy world (virtual reality), in which the user does not play the role of a passive observer on the periphery, but actively participates in the events that take place there; however, communication takes place in a language common to the user - primarily audio and video.
Multimedia tools include: audio (speech) and video input and output devices; high-quality sound (sound) and video - (video) boards, video capture boards (video grabber), which take an image from a VCR or camcorder and insert it into the PC; high-quality amplifiers, speakers, large-screen acoustic and video-receiving systems, now common scanners (because they allow the computer to automatically enter printed text and images); high quality printers and plotters.
Zubaydo Ikandarova
Direction of Informatics teaching
methodology Level 3 2nd group student
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