A TV tuner is a computer Electronics is the study and use of electrical devices that operate by controlling the flow of electrons or other electrically charged particles in devices such as thermionic valves and semiconductors. The pure study of such devices is considered as a branch of physics, while the design and construction of electronic... component which allows you to watch See TV (disambiguation) for other uses and Television (band) for the rock band Family watching television in the 1950s. Television is a telecommunication system for broadcasting and receiving moving pictures and sound over a distance. The term has come to refer to all the aspects of television programming and transmission... television on your The tower of a personal computer (specifically a Power Mac G5). A computer is a device or machine for making calculations or controlling operations that are expressible in numerical or logical terms. Computers are constructed from components that perform simple well-defined functions. The complex interactions of these components endow... computer. Most TV tuners also function as video capture cards, allowing them to record television programs onto a Typical hard drives of the mid-1990s. A hard disk (or hard disc or hard drive or hard disk drive) is a computer storage device. Mechanics A hard disk uses rigid rotating platters. It stores and retrieves digital data from a planar magnetic surface. Information is written to the disk... hard disk. Almost all TV tuners can function as FM radio is a broadcast technology invented by Edwin Howard Armstrong that uses frequency modulation to provide high-fidelity broadcast radio sound. History of FM radio in the US Main article: History of radio, FM radio. In the United States, FM radio stations broadcast at frequencies of 88–108... FM radios: this is because the FM radio spectrum lies between television channels 6 and 7, and television sound uses the same modulation as FM.

There are two types of TV tuners available: external tuners and internal tuners. External tuners sit outside the computer and attached to the computer, usually by a Note: USB may also mean upper sideband in radio. Type A USB connector Universal Serial Bus (USB) provides a serial bus standard for connecting devices, usually to a computer, but it also is in use on other devices such as set-top boxes, game consoles and PDAs. Overview A USB... USB connection. Internal tuners are generally For other meanings of PCI, see PCI (disambiguation). 32-bit PCI expansion slots on a motherboard The Peripheral Component Interconnect standard (in practice almost always shortened to PCI) specifies a computer bus for attaching peripheral devices to a computer motherboard. These devices can take the form of: integrated circuits fitted... PCI or PCI Express (formerly known as 3GIO for 3rd Generation I/O, not to be mistaken with PCI-X) is an implementation of the PCI computer bus that uses existing PCI programming concepts and communications standards, but bases it on a much faster serial communications system. It is being supported primarily... PCI Express cards that are plugged into a computer Sony Playstation motherboard A motherboard, also known as main board, logic board or system board, is the central or primary circuit board making up a complex electronic system, such as a computer. A typical computer is built with the microprocessor, main memory, and other basic components on the motherboard. Other... motherboard's internal slots. Some A GeForce 4 4200-based graphics card A graphics card or video card is a component of a computer which is designed to convert a logical representation of an image stored in memory to a signal that can be used as input for a display medium, most often a monitor... video cards also function as tuners.

Most internal tuners do all the Signal processing is the processing, amplification and interpretation of signals. Signals may come from various sources. There are various sorts of signal processing, depending on the nature of the signal, as in the following examples. Digital signal processing - for signals that have been digitized. Processing is done by digital circuits... signal processing needed to convert a radio signal into an on-screen image; some even make use of direct links to the sound card and video card to bypass the CPU entirely. External tuners may convert the signal into either a video stream suitable for display on the screen, or to an intermediate format such as The Moving Picture Experts Group (MPEG) is a small group charged with the development of video and audio encoding standards. Since its first meeting in 1988, MPEG has grown to include approximately 350 members from various industries and universities. MPEGs official designation is ISO/IEC JTC1/SC29 WG11. MPEG... MPEG; in either case, the CPU is needed to direct the image onto the screen.

There are also TV tuners based on A software-defined radio (SDR) system is a radio communication system which uses software for the modulation and demodulation of radio signals. An SDR performs significant amounts of signal processing in a general purpose computer, or a reconfigurable piece of digital electronics. The goal of this design is to produce... software radio: the tuner only provides basic radio tuning; the signal processing needed to turn the radio signal into an image is handled entirely by the CPU. These tuners are very rare.

TV tuners supporting Digital television (DTV) uses digital modulation and compression to broadcast video, audio and data signals to television sets. Introduction A major use of DTV can be to carry more channels on the same amount of bandwidth. Another can be high-definition programming. The digital signal eliminates common artifacts from analog... digital television broadcasts have recently become available; a tuner displaying an HDTV image on a computer monitor is typically much cheaper than a dedicated high-definition television system, but with a smaller physical screen.