What is Digital TV?

TV transmitted to televisions in 90% of brazilian homes use analogical channels with 6 MHz bandwidth.

On Digital TV, audio and video transmission change to digital signals which, codified, allows an efficient use of electromagnetic specter, according to the increase of tax data transmission in the band of available frequency.

It is possible to transmit:

• Sound and image with better quality making possible High Definition Television (HDTV). The image resolution of analogical TV that is 400 x 400 pixels could be up to 1920 x 1080 pixels.
• More channels ( until 4) in the same frequency used by an analogical channel.

Digital TV presents some functionalities that allows an interactivity between the viewer and TV, making possible:

• The access to additional informations , for example, programation menu.
• Viewer interaction with the TV, for example a return channel through telephonic line, being possible to shop and vote.

Digital TV Implantation

Digital TV implantation will have a adaptation period, that will take 10 to 15 years, in which TV will transmit simultaneously two channels of 6 MHz, analogical and digital.

With the introduction of digital technology on Broadcasting TV, the viewer will be able to choose one of the following situations:

• Continues to receive the actual TV signal using analogical TV.
• Get a converter (set top box) that will allow to receive digital signal and converte it to video and audio available in your TV receiver.
• Get a new TV that already has the converter.

This process has been happening in many countries in the world. In United Kingdom (UK), for example, the process started in 1998 and 65.9% of the homes already had the access to Digital TV in September of 2005. In United States it started in 2002 and Japan in 2003.

The success of Digital TV implantation depends on converters (set top box) with low prices to the population, in which it is only possible with great production. That is why Brazil is adopting only one Digital TV standard.

Digital TV Implantation in Brazil - Chronograma

(Dec. 5820 of 06/29/06 )

Its following below the steps to be concluded per each TV sender to the implantation of Digital TV in Brazil. (Port. 652 Minicom 10/10/06)

Deadline to the presentation of the consignatio petition (Step 1)

*after 06/29/2007; **after 10/01/2007

*** after the beggining of digital transmission,the generator station will work on the programation. Source: Port 652 from 12/10/06

It will be consigned for each TV sender a channel of 6 MHz to Digital TV transmission. The Digital TV covering of each channel must be the same analogical channel.

Work Groups

After decree definition of SBTVD-T are being created groups to make possible the implantation of the System:

Was created a Digital TV Forum whose Executive Committee will have between 10 and 11 members: four ( industry) - being two of the transmission segment and two of reception devices; three or four (broadcasting); two of university and one of the software industry.

The Industry, Ministry of Public Works and Foreign Commerce, through petition 07/31/2006 created the Executive Group of Digital Television, that will have, as incumbency, to define and to implement actions related with the Brazilian System of Digital Televisão Terrestre (SBTVD-T) in the areas of MDIC ability and its units.

Projects

Minicom authorized in 09/1/2006 R$ 3,965 million of Funttel resources to Finep to be invested in the projects:

• P&D Systems of Transmission to Digital TV (R$ 630,000,00)
• Rhodes - System of Telemetry and Geo-referencement (R$ 1 million)
• Experimental Network of high speed - Giga 1 (R$ 442 thousand) and Giga 2 (R$ 349,6 thousand
• Telecommunication Convergence - Converge R$1.4 million
  

Source: telecom Online

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