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All-Channel Receiver Act
The All-Channel Receiver Act of 1962 (ACRA) (), commonly known as the All-Channels Act, was passed by the United States Congress in 1961, to allow the Federal Communications Commission to require that all television set manufacturers must include UHF tuners, so that new UHF- band TV stations (then channels 14 to 83) could be received by the public. This was a problem at the time since most affiliated stations of the Big Three television networks ( ABC, CBS, NBC) were well-established on VHF, while many local-only stations on UHF were struggling for survival. The All-Channel Receiver Act provides that the Federal Communications Commission shall "have authority to require that apparatus designed to receive television pictures broadcast simultaneously with sound be capable of adequately receiving all frequencies allocated by the Commission to television broadcasting." Under authority provided by the All Channel Receiver Act, the FCC adopted a number of technical standards to inc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Communications Act Of 1934
The Communications Act of 1934 is a United States federal law signed by President Franklin D. Roosevelt on June 19, 1934 and codified as Chapter 5 of Title 47 of the United States Code, et seq. The Act replaced the Federal Radio Commission with the Federal Communications Commission (FCC). It also transferred regulation of interstate telephone services from the Interstate Commerce Commission to the FCC. The first section of the Act originally read as follows: "For the purpose of regulating interstate and foreign commerce in communication by wire and radio so as to make available, so far as possible to all the people of the United States a rapid, efficient, Nation-wide, and world-wide wire and radio communication service with adequate facilities at reasonable charges, for the purpose of the national defense, for the purpose of promoting safety of life and property through the use of wire and radio communication, and for the purpose of securing a more effective execution of this p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DuMont Television Network
The DuMont Television Network (also known as the DuMont Network, DuMont Television, simply DuMont/Du Mont, or (incorrectly) Dumont ) was one of America's pioneer commercial television networks, rivaling NBC and CBS for the distinction of being first overall in the United States. It was owned by DuMont Laboratories, Allen B. DuMont Laboratories, a television equipment and set manufacturer, and began operation on June 28, 1942.Weinstein, David (2004). ''The Forgotten Network: DuMont and the Birth of American Television'', p. 16. Philadelphia: Temple University Press. . The network was hindered by the prohibitive cost of broadcasting, a freeze on new television stations in 1948 by the Federal Communications Commission (FCC) that restricted the network's growth, and even the company's partner, Paramount Pictures. Despite several innovations in broadcasting and the creation of one of television's biggest stars of the 1950s—Jackie Gleason—the network never found itself on solid fi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Terrestrial Television
Terrestrial television or over-the-air television (OTA) is a type of television broadcasting in which the signal transmission occurs via radio waves from the terrestrial (Earth-based) transmitter of a TV station to a TV receiver having an antenna. The term ''terrestrial'' is more common in Europe and Latin America, while in Canada and the United States it is called ''over-the-air'' or simply ''broadcast''. This type of TV broadcast is distinguished from newer technologies, such as satellite television (direct broadcast satellite or DBS television), in which the signal is transmitted to the receiver from an overhead satellite; cable television, in which the signal is carried to the receiver through a cable; and Internet Protocol television, in which the signal is received over an Internet stream or on a network utilizing the Internet Protocol. Terrestrial television stations broadcast on television channels with frequencies between about 52 and 600 MHz in the VHF and UHF ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tuner (radio)
A tuner is a subsystem that receives radio frequency (RF) transmissions, such as FM broadcasting, and converts the selected carrier frequency and its associated bandwidth into a fixed frequency that is suitable for further processing, usually because a lower frequency is used on the output. Broadcast FM/ AM transmissions usually feed this intermediate frequency (IF) directly into a demodulator that converts the radio signal into audio-frequency signals that can be fed into an amplifier to drive a loudspeaker. More complex transmissions like PAL/NTSC (TV), DAB (digital radio), DVB-T/DVB-S/DVB-C (digital TV) etc. use a wider frequency bandwidth, often with several subcarriers. These are transmitted inside the receiver as an intermediate frequency (IF). Subcarriers are then processed like real radio transmissions, but the whole bandwidth is sampled with an analog-to-digital converter (A/D) at a rate faster than the Nyquist rate (that is, at least twice the IF frequency). A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Analog TV
Analog television is the original television technology that uses analog signals to transmit video and audio. In an analog television broadcast, the brightness, colors and sound are represented by amplitude, phase and frequency of an analog signal. Analog signals vary over a continuous range of possible values which means that electronic noise and interference may be introduced. Thus with analog, a moderately weak signal becomes snowy and subject to interference. In contrast, picture quality from a digital television (DTV) signal remains good until the signal level drops below a threshold where reception is no longer possible or becomes intermittent. Analog television may be wireless (terrestrial television and satellite television) or can be distributed over a cable network as cable television. All broadcast television systems used analog signals before the arrival of DTV. Motivated by the lower bandwidth requirements of compressed digital signals, beginning in the 20 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NTSC
The first American standard for analog television broadcast was developed by National Television System Committee (NTSC)National Television System Committee (1951–1953), Report and Reports of Panel No. 11, 11-A, 12–19, with Some supplementary references cited in the Reports, and the Petition for adoption of transmission standards for color television before the Federal Communications Commission, n.p., 1953], 17 v. illus., diagrs., tables. 28 cm. LC Control No.:5402138Library of Congress Online Catalog/ref> in 1941. In 1961, it was assigned the designation CCIR System M, System M. In 1953, a second NTSC standard was adopted, which allowed for color television broadcast compatible with the existing stock of black-and-white receivers. It is one of three major color formats for analog television, the others being PAL and SECAM. NTSC color is usually associated with the System M. The only other broadcast television system to use NTSC color was the System J. Since the intr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Digital Television
Digital television (DTV) is the transmission of television signals using digital encoding, in contrast to the earlier analog television technology which used analog signals. At the time of its development it was considered an innovative advancement and represented the first significant evolution in television technology since color television in the 1950s. Modern digital television is transmitted in high-definition television (HDTV) with greater resolution than analog TV. It typically uses a widescreen aspect ratio (commonly 16:9) in contrast to the narrower format of analog TV. It makes more economical use of scarce radio spectrum space; it can transmit up to seven channels in the same bandwidth as a single analog channel, and provides many new features that analog television cannot. A transition from analog to digital broadcasting began around 2000. Different digital television broadcasting standards have been adopted in different parts of the world; below are the more ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Terrestrial TV
Terrestrial television or over-the-air television (OTA) is a type of television broadcasting in which the signal transmission occurs via radio waves from the terrestrial (Earth-based) transmitter of a TV station to a TV receiver having an antenna. The term ''terrestrial'' is more common in Europe and Latin America, while in Canada and the United States it is called ''over-the-air'' or simply ''broadcast''. This type of TV broadcast is distinguished from newer technologies, such as satellite television (direct broadcast satellite or DBS television), in which the signal is transmitted to the receiver from an overhead satellite; cable television, in which the signal is carried to the receiver through a cable; and Internet Protocol television, in which the signal is received over an Internet stream or on a network utilizing the Internet Protocol. Terrestrial television stations broadcast on television channels with frequencies between about 52 and 600 MHz in the VHF and UHF ba ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of ATSC Standards
Below are the published ATSC standards for ATSC digital television service, issued by the Advanced Television Systems Committee. *A/49: Ghost Canceling Reference Signal for NTSC (for adjacent-channel interference or co-channel interference with analog NTSC stations nearby) *A/52B: audio data compression (Dolby AC-3 and E-AC-3) *A/53E: "ATSC Digital Television Standard" (the primary document governing the standard) *A/55: "Program Guide for Digital Television" (now deprecated in favor of A/65 PSIP) *A/56: "System Information for Digital Television" (now deprecated in favor of A/65 PSIP) *A/57A: "Content Identification and Labeling for ATSC Transport" (for assigning a unique digital number to each episode of each TV show, to assist DVRs) *A/63: "Standard for Coding 25/50 Hz Video" (for use with PAL and SECAM-originated programming) *A/64A "Transmission Measurement and Compliance for Digital Television" *A/65C: "Program and System Information Protocol for Terrestrial Broadcast and C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Telemundo
Telemundo (; formerly NetSpan) is an American Spanish-language terrestrial television network owned by NBCUniversal Telemundo Enterprises, a division of NBCUniversal, which in turn is owned by Comcast. It provides content nationally with programming syndicated worldwide to more than 100 countries in over 35 languages. The network was founded in 1984 as NetSpan before being renamed Telemundo in 1987 after the branding used on WKAQ-TV, its owned-and-operated station in San Juan, Puerto Rico. In 1997, Liberty Media and Sony Pictures Entertainment acquired controlling interest in Telemundo. NBC then purchased Telemundo in 2001. The channel broadcasts programs and original content aimed at Latin American audiences in the United States and worldwide, consisting of telenovelas, sports, reality television, news programming and films—either imported or Spanish-dubbed. In addition, Telemundo operates Universo, a separate channel directed towards young Hispanic audiences; Telemu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Univision
Univision () is an American Spanish-language free-to-air television network owned by TelevisaUnivision. It is the United States' largest provider of Spanish-language content. The network's programming is aimed at the Latino public and includes telenovelas and other drama series, sports, sitcoms, reality and variety series, news programming, and imported Spanish-language feature films. Univision is headquartered in Midtown Manhattan, New York City, and has its major studios, production facilities, and business operations based in Doral, Florida (near Miami). Univision is available on pay television providers throughout most of the United States, with local stations in over 60 markets with large Latin American communities. Most of these stations air full local newscasts and other local programming in addition to network shows; in major markets such as Los Angeles, Miami, and New York City, the local newscasts carried by the network's owned-and-operated stations are equally c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fox Broadcasting Company
The Fox Broadcasting Company, commonly known simply as Fox and stylized in all caps as FOX, is an American commercial broadcast television network owned by Fox Corporation and headquartered in New York City, with master control operations and additional offices at the Fox Network Center in Los Angeles and the Fox Media Center in Tempe. Launched as a competitor to the Big Three television networks ( ABC, CBS, and NBC) on October 9, 1986, Fox went on to become the most successful attempt at a fourth television network. It was the highest- rated free-to-air network in the 18–49 demographic from 2004 to 2012 and again in 2020, and was the most-watched American television network in total viewership during the 2007–08 season. Fox and its affiliated companies operate many entertainment channels in international markets, but these do not necessarily air the same programming as the U.S. network. Most viewers in Canada have access to at least one U.S.-based Fox affiliate, e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
