Terrestrial television is a type of television broadcasting in which the television signal is transmitted by radio waves from the terrestrial (Earth-based) transmitter of a television station to a TV receiver having an antenna. The term terrestrial is more common in Europe and Latin America, while in the United States it is called broadcast or over-the-air television (OTA). The term "terrestrial" is used to distinguish this type from the newer technologies of satellite television, in which the television signal is transmitted to the receiver from an overhead satellite, and cable television, in which the signal is carried to the receiver through a cable.
The Integrated Services Digital Broadcasting is a Japanese standard for digital television (DTV) and digital radio used by the country's radio and television networks. ISDB replaced NTSC-J analog television system and the previously used MUSE Hi-vision analogue HDTV system in Japan, and will be replacing NTSC, PAL-M and PAL-N in South America and the Philippines. Digital Terrestrial Television Broadcasting (DTTB) services using ISDB-T started in Japan in December 2003 and in Brazil in December 2007 as a trial. Since then, many countries have adopted ISDB over other digital broadcasting standards.
Digital terrestrial television is a technology for broadcast television in which land-based (terrestrial) television stations broadcast television content by radio waves to televisions in consumers' residences in a digital format. DTTV is a major technological advance over the previous analog television, and has largely replaced analog which had been in common use since the middle of the last century. Test broadcasts began in 1998 with the changeover to DTTV beginning in 2006 and is now complete in many countries. The advantages of digital terrestrial television are similar to those obtained by digitising platforms such as cable TV, satellite, and telecommunications: more efficient use of limited radio spectrum bandwidth, provision of more television channels than analog, better quality images, and potentially lower operating costs for broadcasters.
Globally Executable MHP (GEM) is a DVB specification of a Java based middleware for TV broadcast receivers, IPTV terminals and Blu-ray players. GEM is an ETSI standard and an ITU "Recommendation. GEM defines a set of common functionalities which are independent from the signaling and protocols of a specific transmission network and enables to write interoperable Java applications for TV. GEM is not intended to be directly implemented, but rather forms the basis for broader specifications targeting a particular network infrastructure or class of device. GEM defines profiles for different device classes (targets) – these define the set of available features of GEM for this device class. Currently GEM defines targets for broadcast, packaged media (Blu-Ray) and IPTV. Combinations of these targets can be combined into a hybrid GEM platform, which enables to build devices with multiple network interfaces, such as a combined broadcast/IPTV set-top box.
ISDB-T International, ISDB-Tb or SBTVD, short for Sistema Brasileiro de Televisão Digital, is a technical standard for digital television broadcast used in Brazil, Argentina, Peru, Botswana, Chile, Honduras, Venezuela, Ecuador, Costa Rica, Paraguay, Philippines, Bolivia, Nicaragua, El Salvador and Uruguay, based on the Japanese ISDB-T standard. ISDB-T International launched into commercial operation on December 2, 2007, in São Paulo, Brazil, as SBTVD.
Broadcast Markup Language, or BML, is an XML-based standard developed by Japan's Association of Radio Industries and Businesses as a data broadcasting specification for digital television broadcasting. It is a data-transmission service allowing text to be displayed on a 1seg TV screen.
Teletext was introduced in the analogue television in the 80's, leading to a limited interaction with television sets to obtain information about things like the schedule and weather. But nowadays this concept goes even far away and a new and improved way of interaction with the user has been developed. The early private broadcasters, as Canal+, were the pioneers in adopting this new form and today are preceded by their digital formats.
The Brazilian Association of Technical Standards, usually rendered in Portuguese as Associação Brasileira de Normas Técnicas (ABNT) is a private non-profit organization and the normative body which is responsible for technical standards in Brazil, and intends to promote technological development in the country. Brazilian national standards published by the association are named Norma Brasileira Regulamentadora and abbreviated NBR.
Ginga is the middleware specification for the Nipo-Brazilian Digital TV System. Ginga is also ITU-T Recommendation for IPTV Services. It is also considered in ITU-T recommendations for Cable Broadcast services and for Terrestrial Broadcast services by ITU-R BT.1889, ITU-R BT.1699 and ITU-R BT.1722. Ginga was developed based on a set of standardized technologies but mainly on innovations developed by Brazilian researchers. Its current reference implementation was released under the GPL license.
ABNT NBR 15601 is the technical standard published by ABNT, the Brazilian Association of Technical Standards, that is responsible for addressing the aspects regarding transmission on the Brazilian Digital Terrestrial Television Standards, also known as SBTVD or ISDB-T version B.
The audio and video compression aspects of the Brazilian Digital Terrestrial Television Standards are described in the three documents published by ABNT, the Brazilian Association of Technical Standards, the ABNT NBR 15602-1:2007 - Digital terrestrial television - Video coding, audio coding and multiplexing - Part 1: Video coding; ABNT NBR 15602-2:2007 - Digital terrestrial television - Video coding, audio coding and multiplexing - Part 2: Audio coding; and ABNT NBR 15602-3:2007 - Digital terrestrial television - Video coding, audio coding and multiplexing - Part 3: Multiplexing signals.
The ABNT NBR 15603 is the technical document of the SBTVD standards that describes in detail aspects regarding Multiplexing and service information (SI). The document is divided in 3 separate parts that covers: SI for digital broadcasting systems ; Data structure and definition of SI basic Information ; and Syntax and definition of SI extended information.
The ABNT NBR 15605 is the technical document of the SBTVD standards that describes in detail aspects regarding content security issues and copy protection, also known as Digital Rights Management (DRM). It's a detailed reference for manufacturers and content providers that aim to coordinate transmission and reception protection systems in a transparent and effective way for mass viewing.
ABNT NBR 15606 refers to a collection of technical standards that govern the transmission of digital terrestrial television in Brazil.
The standard ABNT NBR 15607-1:2008 - Digital terrestrial television – Interactivity channel establishes the ways in which a receiver device can send information back to the broadcaster through different communication mechanisms. The transmission of common broadcasting content will be done through the air through the main programming feed, while a more customized use of content can be sent through the interactive channel.
The standard ABNT NBR 15608 describes in further detail the parts of the digital television system that need clarifying, setting directives for implementation in a combination of mandatory and optional features. It can be seen as a refinement of the original specification documents focused on system implementation.
BraSCII is an encoded repertoire of characters that was used in Brazil. It was used in the 1980s on several printers, in applications like Carta Certa, in video boards and it was the standard character set in the Brazilian line of MSX computers.
