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Television Systems and Transmission The objective of the Television Systems and Transmission group is to provide the necessary technological knowledge in advanced television systems and transmission technologies to Industry Canada and to the broadcast and telecommunications industry. Fields of expertise include digital television and enhancements to NTSC television. The group supports Industry Canada in meeting its mandate on spectrum management and in developing regulatory frameworks for broadcasting. Guidance is provided to broadcast and telecommunications industries in implementing new broadcast services and developing new equipment. The Television Systems and Transmission group is responsible for monitoring and identifying trends in television transmission technologies and contributing to the planning of future research. The Television Systems and Transmission program is responsible for planning and carrying out a research program in television broadcast signal transmission by: * conducting research in coding, modulation, channel equalization and error correction techniques for the transmission of analog (NTSC) and digital (ATV) television signals over terrestrial off-air, satellite and cable-TV channels; * characterizing transmission channels, in particular terrestrial off-air channels; * developing hardware and software channel simulators; * carrying laboratory and field tests; * developing new concepts for broadcasting services; * studying TV broadcast coverage and spectrum planning tools for digital television systems, such as CRC-COVLAB; * contributing to the development of transmission standards; and * representing Canadian interests in international fora as appropriate. It is also the group's responsibility to design and evaluate the different technologies necessary for the implementation of improved television services and to make sure that Canada selects the best available transmission systems by disseminating information and transferring technology to the industry. For a number of years, the group contributed to the prototype development and evaluation of digital television systems. After years of development, a digital advanced television system standard was proposed by the Advanced Television Systems Committee (ATSC). This standard was adopted in 1996 by the FCC for use in the USA and in 1997 by Industry Canada for use in Canada for over-the-air television broadcasting. For the orderly implementation of digital television broadcasting, critical additional knowledge and information are required with respect to coverage, potential interference with other wireless services and co-existence with the present NTSC analog television during the transition period. Furthermore the ability to use part of the channel capacity for non-programming services such as a variety of data services is an important consideration in the digital television implementation plans of the broadcasters. The user requirements for such services have to be better defined and their technical implications on transmission and distribution techniques have to be assessed. With demand for more video services, new delivery systems are emerging such as Multipoint Distribution System (MDS) and Local Multipoint Communication Systems (LMCS). Interoperability of these various systems and the need to integrate broadcast systems into other information systems and services under the umbrella of the "Information Highway" is another important aspect which has implications on transmission technologies for television service delivery. Further Information: Gilles Gagnon Manager Television Systems and Transmission Tel: (613) 998-5002 Fax: (613) 990-6488 E-mail:gilles.gagnon@crc.gc.ca » * Printer-friendly version * Send to friend * PDF version .sumber: @crc.gc.ca