|Originally posted by M.Hat:
From Public Notice CRTC 2001-62
Quote: "4. DTV is a new, over-the-air transmission system. It is designed to serve as an eventual replacement for the current analog NTSC broadcast system that has been in use now in North America for over half a century. The new system is based on the Advanced Television Systems Committee standard (A/53) that has been adopted for use in Canada as well as in the U.S. The standard defines a number of digital television formats ranging from narrow screen to wide screen and from "low definition" to "high definition" television. The DTV standard also allows broadcasters to transmit multiple programs simultaneously (as well as up to five channels of high quality sound per program) using a single television channel. The new standard will overcome many of the shortcomings of today's analog system which have become increasingly apparent as consumer TV sets have become more technologically advanced." Unquote
You're beating a dead horse.
Public Notice CRTC 2001-62 is a call for Public comments on the DTV transition.
From the same document...
In this notice, the Commission seeks comments on the advantages and disadvantages of the various proposals and options outlined below. Parties may also wish to advance other proposals that they believe would better meet the objectives set out in the Broadcasting Act. In providing their comments and suggestions to the Commission on the issues surrounding the transition to digital television, parties should give consideration to how the above objectives can best be met in the context of both digital television broadcasting and digital television distribution."
Also if you read this report from Ryerson Polytechnique University, the premiere broadcast university of North America, it hardly sounds like they think the cement has hardened on the DTV Modulation decision in Canada... Decisions can change like they recently did in Taiwan.
Ryerson Research Helps Pioneer Digital Terrestrial Broadcast in Canada.
Terry Harvey, the IBO DTV Facilitator at Ryerson University, is in the midst of an exciting
research and development project. Ryerson, in conjunction with Greater Toronto Area
broadcasters, is testing the viability of digital terrestrial broadcasting under the auspices of
Canadian Digital Television Inc. (CDTV). CDTV is the body that brings together Canadian broadcasters during the transition from analogue to digital broadcasting.
Digital transmission is more desirable to broadcasters than analogue transmission. Part of the reason for this is that, despite the initial capital investment, digital television produces higher quality television broadcasts while its MPEG-2 compression rates allow for more TV signals and digital data to fit into a similar broadcast space with little or no loss in quality. CityTV is one of the Toronto area broadcasters involved in the project and is currently operating a digital TV transmitter located atop the CN Tower. This transmitter functions much like the regular variety except that the signals it transmits are digital rather
than analogue. The transmitter was installed in early December of last year and was used for the
first time on the eighth of that month to broadcast the CDTV general meeting. Since then, the transmitter has been in constant use broadcasting looped HD content so its reception characteristics can be tested. Recently, Industry Canada issued a license for a research project that will run from January 2001 to June 2002. During this time, various tests will be conducted to explore not only the technical aspects of digital,
terrestrial, over the air broadcast, but various business models as well. It is in the area of developing new business models that Ryerson, through its research group in the Rogers Communications Centre, will become involved.
The advent of digital broadcast technology has created a period of instability in the realm of broadcast
communications technology. Canada, like all other countries, has been trying to decide on a digital TV
broadcast format that will last many years. This is not unlike the situation in the 40's and 50's when countries were trying to decide on the monochromatic and colour standards for analogue TV broadcast. The Canadian position on digital television was to stay roughly two years behind aggressive American development in DTV so it could take advantage of any lessons learned. With the Americans moving forward, the stage is set for Canada to determine a standard for digital, terrestrial, over the air broadcast.
"It's a very difficult situation at the moment," says Harvey. "Some countries have already adopted
standards, and the two international standards for digital, over the air broadcast are the ATSC (Advanced
Television Systems Committee) standard and the DVBT (Digital Video Broadcast - Terrestrial) standard. Both the ATSC and the DVB were established in the early 1990's to develop the standards for digital broadcast. The CDTV test in Toronto will investigate both the DVB-T and ATSC delivery systems."
Harvey has been an active participant in this endeavour by assisting in the development of the CDTV digital transmitter test meetings for the GTA. Ryerson University will play an important role in this process as will the Rogers Communications Centre. The Centre will receive assistance from various broadcasters and from various broadcast suppliers to put together a facility to undertake a comprehensive test of various
systems for both DVB and ATSC transmission. To test new ideas, the Rogers Centre will use several of the IBO (Interactive Broadcast Ontario) interactive prototypes to test the interactive possibilities of digital television. These interactive projects will be relayed from Ryerson to the CN Tower for over-the-air transmission via a fibre optic line. Another important part of the test is to demonstrate digital television's potential in the mobile environment. Ryerson and its broadcast partners are eager to explore
new possibilities with the technology especially where it can help justify the costly conversion to digital
transmitters. One growing area is in the field of mobile reception. ATSC was initially designed for an
environment that would allow the maximum amount of data to be transmitted from a broadcast tower to a fixed rooftop antenna. Advances in digital delivery technology can aid in making the transmission more useful in the mobile environment.
DVB transmission has been designed to support mobile television reception. For example, in Germany, DVB-T transmission tests were conducted with television receivers that were installed within motor vehicles. They were able to broadcast 15 megabits per second reliably at speeds of up to 200 km per hour while still maintaining the highest broadcast quality available. In fact, the reception quality in the mobile configuration was comparable or even better than the analogue standard NTSC we use today. This opens up the possibility for merging television markets with cars, often referred to as "backseat multimedia."
The reason for Ryerson's participation in this project is to help broadcasters determine what options are available in terms of a DTV business model. Ryerson has been developing knowledgeable workers for the broadcast industry for well over 50 years. As well, Ryerson has pioneered the development of FM radio and hosted Canada's first TV studio broadcast in 1949.
Ultimately, broadcasters will have to decide what business models they wish to pursue. "A broadcaster
can conceivably go into a less robust mode during certain hours of the day and a more robust, High
Definition mode during prime time," Harvey explains. Canadian broadcasters have already been
allocated a digital television channel by Industry Canada to help facilitate the transition from
analogue to digital broadcasting. The current research opportunity is an excellent time to
demonstrate how a digital channel can best be utilized. And given the current resources of
both the Rogers Communications Centre and the Interactive Broadcast Ontario Project, Ryerson will demonstrate to the broadcast community a variety of ways digital broadcast can be delivered creatively while opening up new possibilities for revenue that will help support it.