On-TV-Digital

Digital television, or DTV is the type of television that uses digital modulation and compression system for broadcast sinyalgambar, voice, and data to the television. Modulation itself is a process of change in a periodic wave that makes a signal capable of carrying information. With the modulation process, some information (usually berfrekeunsi low) could be incorporated into suatugelombang carrier, usually a high-frequency sine wave. Equipment to carry out the modulation process called modulator, while equipment for obtaining information initial information (as opposed to from the modulation) demodulator and the equipment referred to implement both processes disebutmodem. Digital television is a tool used to capture digital TV broadcasting, the development of analog to digital broadcasting system which converts the information into digital signals in the form of bits of data, such as computers.

This triggers the development of digital television, driven by several factors, namely the external environment changes and technological developments. Below is the translation of the following factors:

Changes in the external environment:
Analogue television market is becoming obsolete, less desirable or saturated.
The existence of a competition or a competitor with satellite broadcasting system dankabel.
Technological development :
Digital signal processing technology.
Digital transmission technology.
Teknologisemikonduktor.
Technology equipment and high resolution.
A little about the Analog TV, analog TV pictures encode information by varying the voltage or frequency of the signal. The system used in the analog NTSC television (National Television System Committee), PAL, and SECAM.

Differences in Digital TV and Analog TV

Of understanding both between Digital TV and Analog TV, on the other hand there are fundamental differences dikeduanya, namely:

The most fundamental difference between analog television broadcasting system and digital image located at the reception through the transmitter. In an analog system, the farther away from the television station, the signal will be generated will be weakened and receiving pictures of the station to be bad and shaded. While the digital system, as opposed to analog. Broadcast crystal clear images will be enjoyed to the point where the signal is no longer acceptable.
In the transmission system outbursts, most TVs in Indonesia are still using a system analogous to the way memodulasikannya directly on Carrier Frequency, While on a digital system, the image data or voice is encoded in digital mode (discrete) just radiated.
 The resulting impact of the digital broadcasting system in Indonesia

           At this time the number of television sets population has reached tens of millions of units. Given it is seen that television fans in Indonesia so much. Television is broadcast tentacle display, all the television picture is formed by a single point of light moving back and forth, the front-rear or top-down, fast on the television screen that is not visible to the eye, so that all you see is a series of images. Television signals work like AM radio, in liaison with the exception of high-frequency carrier. On the radio of a great voice to soft while the television from light to dark. Television device is synchronized with the transmitter to generate a precise pattern of a pixel that will be placed on display.

The emergence of digital television system in Indonesia should be considered carefully as well the impact and consequences, because during this time there are many people who use and are familiar with the use of analog television. The inconvenience which must be received by the switch to digital TV, namely:

The need for new TV that cost dapay be quite expensive. It will cause a big negative impact, because almost all components of television in Indonesia are still using analog components, so that advancement of digital television technology is able to turn off the small businesses that had been there.
How about the access to the media and the condition of the network access system itself. Issues such as digital TV decoder settings or media content to be worthy examine in this case and access to the frequency spectrum.
Migration from analogue broadcasting era into the era of digital broadcasting, which has the consequence of the availability of more broadcast channels, will open wider opportunities for broadcasters in carrying out its functions and to provide more opportunities for the public to be involved in this broadcasting industry.
Migration from analogue broadcasting era into the era of digital broadcasting, which has the consequence of the availability of more broadcast channels, will open wider opportunities for broadcasters in carrying out its functions and to provide more opportunities for the public to be involved in this broadcasting industry.
The signal processing system. In digital systems, since the necessary additional process eg Fast Fourier Transform (FFT), Viterbi decoding and equalization at the receiver, then the Digital TV will be a little late a few seconds compared to Analog TV. When analogue TV is already displaying a new image, the Digital TV is still a few seconds to show the previous image.
At the beginning of the operation of the digital system is generally done TV broadcasts along with analog broadcasts in the transition period. Simultaneously test the system to get the results of the implementation of the Digital TV broadcasts of the most economically appropriate to the needs of countries operate.

The impact of digital TV broadcasting

The positive impacts, many public benefits to be gained by switching to digital TV broadcasting, among others:
The picture quality is much smoother and sharper.
reduce the Doppler effect if it receives a broadcast TV in mobile conditions.
Reduction of the effects of noise.
Digital signals can accommodate broadcast programs in one package, because the bandwidth usage on digital tv is not for analog tv.
The negative impact, in addition to getting things positive reply from the use of Digital TV. On the other hand we also get the negative impact, namely:
Regulation of broadcasting should we repaired to the adjustment.
Supporting industries should be prepared both the device and its contents.
If channel digital TV is given indiscriminately to newcomers, in addition to the organizer of TV broadcasting terrestrial digital must build their own infrastructure from zero, then the opportunity for the organizers of analog TV existing as TVRI, 5 private TV existing and five organizers of a new TV to turn your TV into a digital future days will be closed because of the frequency channels have been exhausted.
Standardization should be decided either for tools and technologies that will be used.
Opinions about the prospects for the future of television broadcasting is associated with the digitalization of broadcast television systems

            The progress of technological development in Indonesia is something we should be proud. Due to the absence of these, we can catch up with us against other developing countries. The displacement of the transition into Digital TV Analog TV is not easy. transition from analog television sets into digital television sets require replacement of a television transmitter and a television receiver. However, if you want to keep using analog television, digital broadcasting can be captured with an additional tool called a converter box. When using analog television, digital broadcasting signal will be converted by the converter box into an analog signal. Thus users of analog TV set can still enjoy digital television broadcasts. Users can still use analog television broadcasting analog and gradually switching to digital broadcast technology uninterrupted broadcast service is used for this.

Such a transition process can minimize the risk of loss is mainly faced by television operators and the public. The risks which include information regarding the broadcast programs and enhancements that must be installed. Before communities can replace the analogue to digital television, the public receives the analog broadcast of a television transmitter that broadcasts digital television broadcasting. Reisiko losses that can be faced by television operators comes from the cost of building the infrastructure of terrestrial digital television is relatively much more expensive than building analog television infrastructure.

Advantages of Digital TV
Advantages of digital signal in analog than digital TV lies in its resistance to noise and simplicity to repair (recovery) in the receiver with error correction code (error correction code). Additionally advantage of other digital transmission is less bandwidth due to digital channel interference is lower, so that several channels can be packed or "compressed" and saved. This became possible because digital TV broadcasting system using OFDM (Orthogonal Frequency Division Multiplexing) are resilient in overcoming the effects of cross-plural. Another advantage is that digital signals can be operated with low power (less power). Those are some things that are very mengutungkan in digital TV. That advantage produces image quality and color are very much better than analog TV. (Httpwww.beritaiptek.comzberita-beritaiptek-2006-01-11-Toward-Era-TV-Digital.shtml.htm).

Quality Digital Broadcasting

Digital TV has broadcast the results of image quality and color much better than that produced by analog television. Digital television delivery system produces crystal clear images and stable despite the broadcast receiving device in a state of moving at high speed. Digital TV has broadcast quality accuracy and high resolution. Digital technology requires broadcast channels with a very high rate reaches Mbps for the delivery of high-quality information.

Benefits of Digital Broadcasting:

Digital TV broadcasting channels and services enable more than analog television. Broadcasters to broadcast their programs digitally and give an opportunity to the television business opportunities with content that is more creative, interesting, and varied.
Digital TV is used for interactive broadcast. Communities can compare the advantages of broadcast quality analog and digital broadcasts can interact with digital TV.
Terrestrial digital television broadcasts can be received by a television reception system does not move as well as mobile TV reception system. Digital television transmit power needs of smaller causes broadcasts can be received well though mobile broadcast receiver in high speed such as in cars and trains.
Digital broadcast technology offers integration with Digital TV interactive services which have a two-way communication services like the internet.

Terrestrial digital television broadcasting is broadcasting which uses radio frequency VHF / UHF as well as analog broadcasting, but with digital content formats. In analog television broadcasting, the farther away from the television station signals will be weakened and the reception becomes bad and shaded images. As with the digital television broadcasting continues to deliver crystal clear picture and sound to the point where the signal is not acceptable anymore. In short, digital TV broadcasting only knew two status: Thank (1) or not (0). That is, when the digital broadcast receiver device can capture signals, the broadcast program will be accepted. Conversely, if the signal is not received then the picture-sound does not appear.

With digital broadcasts, the quality of pictures and sound received an audience much better than analog broadcasts, where there is no ghosting or any form of noise (spots ant) ​​on the TV monitor. In the era of digital broadcasting, the TV audience does not just watch the broadcast program but can also get additional facilities such as EPG (Electronic Program Guide) to determine the events that have and will be shown later. With digital broadcasting, there is ability to provide interactive services where viewers can directly give a rating of voice broadcast program.

All countries should have established in the migration from analog to digital broadcasting. Developed countries in Europe and the United States have even shut off analog broadcasts (analog switch-off) and switch to digital broadcasting. Therefore, since now the public and industry stakeholders to prepare to migrate from analog television broadcasting era into the era of digital television broadcasting.