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Broadcasting: the story on HearLore | HearLore
Broadcasting
The word broadcasting began not in a laboratory, but in a field, describing the agricultural act of sowing seeds by casting them broadly across the soil. This metaphor was adopted in the late 19th century to describe the widespread distribution of information, first appearing in print and telegraph contexts before finding its home in radio. The first documented use of the term to describe one-to-many radio transmissions appeared in 1898, when a writer in The Electrician noted the advantage of being able to shout a message and spread it broadcast to receivers in all directions. This linguistic shift marked a fundamental change in how humanity conceived of communication, moving from the private, one-to-one exchanges of the telegraph and telephone to a public, one-to-many model that could reach a dispersed audience simultaneously. The evolution of the word from a farming technique to a definition of mass media encapsulates the transition from individual connection to collective experience, setting the stage for the technological revolution that would follow.
The Wireless Revolution
In 1894, Italian inventor Guglielmo Marconi began developing wireless communication using the newly discovered phenomenon of radio waves, proving by 1901 that they could be transmitted across the Atlantic Ocean. This achievement marked the start of wireless telegraphy, but the true birth of audio broadcasting occurred experimentally in the first decade of the 20th century. On the 17th of December 1902, a transmission from the Marconi station in Glace Bay, Nova Scotia, Canada, became the world's first radio message to cross the Atlantic from North America. By 1904, a commercial service was established to transmit nightly news summaries to subscribing ships, which incorporated them into their onboard newspapers. World War I accelerated the development of radio for military communications, and after the war, commercial radio AM broadcasting began in the 1920s, becoming an important mass medium for entertainment and news. World War II again accelerated the development of radio for the wartime purposes of aircraft and land communication, radio navigation, and radar. The transition from point-to-point communication to the one-to-many model fundamentally altered the social fabric, allowing a single voice to reach millions of ears at once.
The Mechanical Image
On the 25th of March 1925, John Logie Baird demonstrated the transmission of moving pictures at the London department store Selfridges, marking the first public demonstration of television. Baird's device relied upon the Nipkow disk and thus became known as the mechanical television, forming the basis of experimental broadcasts done by the British Broadcasting Corporation beginning on the 30th of September 1929. However, for most of the 20th century, televisions depended on the cathode-ray tube invented by Karl Braun. The first version of such a television to show promise was produced by Philo Farnsworth and demonstrated to his family on the 7th of September 1927. After World War II, interrupted experiments resumed and television became an important home entertainment broadcast medium, using VHF and UHF spectrum. The shift from mechanical to electronic systems allowed for higher resolution and reliability, transforming television from a novelty into a central pillar of modern culture and information dissemination.
Common questions
When did the word broadcasting first appear in print to describe radio transmissions?
The first documented use of the term broadcasting to describe one-to-many radio transmissions appeared in 1898. A writer in The Electrician noted the advantage of being able to shout a message and spread it broadcast to receivers in all directions.
Who invented wireless communication and when did the first radio message cross the Atlantic?
Italian inventor Guglielmo Marconi began developing wireless communication using radio waves in 1894. On the 17th of December 1902, a transmission from the Marconi station in Glace Bay, Nova Scotia, Canada, became the world's first radio message to cross the Atlantic from North America.
When was the first public demonstration of television and who demonstrated it?
On the 25th of March 1925, John Logie Baird demonstrated the transmission of moving pictures at the London department store Selfridges. This event marked the first public demonstration of television and relied upon the Nipkow disk to form the basis of experimental broadcasts.
How did the transition from analog to digital signals change the capacity to receive information?
The world's technological capacity to receive information through one-way broadcast networks more than quadrupled during the two decades from 1986 to 2007. This capacity grew from 432 exabytes of optimally compressed information to 1.9 zettabytes, representing an increase from 55 newspapers per person per day in 1986 to 175 newspapers per person per day by 2007.
What are the three main types of broadcasting and how do they differ in funding?
Commercial broadcasting operates as a for-profit enterprise supported by the sale of air time to advertisers. Public broadcasting is usually non-profit and publicly owned, supported by license fees, government funds, and grants. Community broadcasting is a form of mass media in which a television station or radio station is owned, operated, or programmed by a community group to provide local programming.
When did regular television broadcasts start and how did the timing of radio programs change across time zones?
The first regular television broadcasts started in 1937. American radio-network broadcasters habitually forbade prerecorded broadcasts in the 1930s and 1940s, requiring radio programs played for the Eastern and Central time zones to be repeated three hours later for the Pacific time zone.
Originally, all broadcasting was composed of analog signals using analog transmission techniques, but in the 2000s, broadcasters switched to digital signals using digital transmission. An analog signal is any continuous signal representing some other quantity, varying continuously with the pressure of sound waves, while a digital signal represents the original time-varying quantity as a sampled sequence of quantized values. This transition imposed some bandwidth and dynamic range constraints on the representation but offered greater clarity and efficiency. The world's technological capacity to receive information through one-way broadcast networks more than quadrupled during the two decades from 1986 to 2007, from 432 exabytes of optimally compressed information to 1.9 zettabytes. This is the information equivalent of 55 newspapers per person per day in 1986, and 175 newspapers per person per day by 2007. The shift from analog to digital was not merely a technical upgrade but a massive expansion of the human capacity to consume information, fundamentally changing the scale of global communication.
The Business of Airwaves
Commercial broadcasting operates as a for-profit enterprise, usually privately owned, providing programming to the public supported by the sale of air time to advertisers for radio or television advertisements during or in breaks between programs. Public broadcasting, in contrast, is usually non-profit and publicly owned, supported by license fees, government funds, grants from foundations, corporate underwriting, audience memberships, contributions, or a combination of these. Community broadcasting is a form of mass media in which a television station, or a radio station, is owned, operated, or programmed by a community group to provide programs of local interest known as local programming. In the United States, National Public Radio and the Public Broadcasting Service supplement public membership subscriptions and grants with funding from the Corporation for Public Broadcasting, which is allocated bi-annually by Congress. These economic models determine the content, reach, and nature of the messages that reach the public, creating a complex ecosystem where profit, public service, and community interest intersect.
The Live and The Recorded
The first regular television broadcasts started in 1937, and broadcasts can be classified as recorded or live, each with distinct advantages and disadvantages. Recorded broadcasts allow for correcting errors, removing superfluous or undesired material, rearranging it, applying slow-motion and repetitions, and other techniques to enhance the program. However, some live events like sports television can include some of the aspects including slow-motion clips of important goals or hits in between the live television telecast. American radio-network broadcasters habitually forbade prerecorded broadcasts in the 1930s and 1940s, requiring radio programs played for the Eastern and Central time zones to be repeated three hours later for the Pacific time zone. This restriction was dropped for special occasions, as in the case of the German dirigible airship Hindenburg disaster at Lakehurst, New Jersey, in 1937. The tension between the immediacy of live broadcasting and the control of recorded media has shaped the history of the industry, influencing everything from news reporting to entertainment.
The Social Impact
The sequencing of content in a broadcast is called a schedule, and as with all technological endeavors, a number of technical terms and slang have developed. Television and radio programs are distributed through radio broadcasting or cable, often both simultaneously, enabling subscription-based channels, pay-tv, and pay-per-view services. In his essay, John Durham Peters wrote that communication is a tool used for dissemination, stating that dissemination is a lens that helps us tackle basic issues such as interaction, presence, and space and time. Dissemination focuses on the message being relayed from one main source to one large audience without the exchange of dialogue in between. It is possible for the message to be changed or corrupted by government officials once the main source releases it, and there is no way to predetermine how the larger population or audience will absorb the message. They can choose to listen, analyze, or ignore it, making broadcasting a powerful tool for shaping public opinion and culture.
The Engineering Behind
Broadcast engineering is the field of electrical engineering, and now to some extent computer engineering and information technology, which deals with radio and television broadcasting. Audio engineering and RF engineering are also essential parts of broadcast engineering, being their own subsets of electrical engineering. Broadcast engineering involves both the studio and transmitter aspects, the entire airchain, as well as remote broadcasts. Every station has a broadcast engineer, though one may now serve an entire station group in a city. In small media markets the engineer may work on a contract basis for one or more stations as needed. The final leg of broadcast distribution is how the signal gets to the listener or viewer, coming over the air as with a radio station or television station to an antenna and radio receiver, or coming through cable television or cable radio via the station or directly from a network. The Internet may also bring either internet radio or streaming media television to the recipient, especially with multicasting allowing the signal and bandwidth to be shared. This technical infrastructure supports the entire broadcasting ecosystem, ensuring that the content created by writers, producers, and engineers reaches the audience reliably and clearly.