HD Radio

HD Radio is a digital radio broadcasting technology developed by iBiquity, a company formed by Bell Labs and Lucent Technologies, in collaboration with Harris Corporation and Texas Instruments. The technology was designed to provide higher quality audio and additional features compared to traditional AM and FM radio broadcasting, with the support of the National Association of Broadcasters and the Federal Communications Commission (FCC). HD Radio broadcasts are transmitted using a hybrid system that combines digital and analog signals, allowing for a smooth transition from traditional radio to digital radio, as demonstrated by Clear Channel Communications and CBS Radio. The development of HD Radio involved the work of several key individuals, including Robert Struble, the CEO of iBiquity, and Don Messer, a renowned radio engineer.

Introduction

HD Radio is a proprietary technology that allows for the transmission of digital audio and data services, such as OnStar and XM Satellite Radio, over traditional radio frequencies, with the participation of General Motors and Hughes Electronics. The technology uses a combination of COFDM and OFDM modulation schemes to transmit digital signals, as specified by the Advanced Television Systems Committee (ATSC). HD Radio broadcasts can be received using a special receiver, such as those manufactured by Sony, Panasonic, and Denon, which can decode the digital signal and provide improved audio quality, as compared to Dolby Laboratories and DTS (company). The introduction of HD Radio has been supported by several major broadcasters, including National Public Radio (NPR), American Broadcasting Company (ABC), and Westwood One, as well as industry organizations like the Radio Advertising Bureau and the National Radio Systems Committee.

History

The development of HD Radio began in the late 1990s, with the formation of iBiquity in 1998, a joint venture between Bell Labs and Lucent Technologies, with the involvement of Alcatel-Lucent and Nokia. The company worked with several major broadcasters, including Clear Channel Communications and CBS Radio, to develop and test the technology, in collaboration with Microsoft and Intel. The first HD Radio broadcasts took place in 2002, with the launch of several stations in the United States, including WBCN (FM) in Boston and WXRK in New York City, with the support of Entercom and Cumulus Media. The technology was later adopted by several other countries, including Canada, Mexico, and Australia, with the participation of Canadian Broadcasting Corporation (CBC), Televisa, and Australian Broadcasting Corporation (ABC).

Technology

HD Radio uses a hybrid system that combines digital and analog signals, allowing for a smooth transition from traditional radio to digital radio, as demonstrated by BBC Research & Development and European Broadcasting Union (EBU). The digital signal is transmitted using a combination of COFDM and OFDM modulation schemes, as specified by the Digital Video Broadcasting (DVB) project. The technology also uses error correction and forward error correction to ensure reliable transmission of the digital signal, as developed by Qualcomm and Ericsson. HD Radio broadcasts can be received using a special receiver, such as those manufactured by Samsung, LG Electronics, and Toshiba, which can decode the digital signal and provide improved audio quality, as compared to Sennheiser and Bose Corporation.

Features

HD Radio offers several features that are not available on traditional radio, including multicasting, which allows multiple digital channels to be broadcast on a single frequency, as demonstrated by NPR and PBS. The technology also supports the transmission of metadata, such as song titles and artist names, as well as album art and other graphics, as developed by Gracenote and AllMusic. Additionally, HD Radio broadcasts can include interactive services, such as traffic updates and weather forecasts, as provided by Google Maps and The Weather Channel. The technology also supports the transmission of emergency alerts, such as AMBER alerts and weather warnings, as specified by the Federal Emergency Management Agency (FEMA) and the National Weather Service (NWS).

Adoption

The adoption of HD Radio has been slow, with several major broadcasters, including Clear Channel Communications and CBS Radio, initially expressing support for the technology, but later scaling back their commitment, as reported by The New York Times and The Wall Street Journal. However, several other broadcasters, including National Public Radio (NPR) and American Broadcasting Company (ABC), have continued to support the technology, with the participation of Public Radio International (PRI) and BBC World Service. The technology has also been adopted by several car manufacturers, including General Motors and Ford Motor Company, which have included HD Radio receivers in some of their vehicles, as well as Toyota and Honda. Additionally, several consumer electronics manufacturers, including Sony and Panasonic, have released HD Radio receivers, as well as Denon and Onkyo.

Criticisms

HD Radio has faced several criticisms, including concerns about the cost of the technology, as well as the limited availability of HD Radio receivers, as reported by Consumer Reports and CNET. Some critics have also argued that the technology is not compatible with all types of radio broadcasts, such as ham radio and shortwave radio, as noted by the American Radio Relay League (ARRL) and the International Telecommunication Union (ITU). Additionally, some broadcasters have expressed concerns about the potential for interference from HD Radio signals, as well as the impact of the technology on the radio spectrum, as discussed by the Federal Communications Commission (FCC) and the National Telecommunications and Information Administration (NTIA). Despite these criticisms, HD Radio remains a popular technology among some broadcasters and consumers, with the support of Microsoft and Apple Inc.. Category:Digital radio