Monitoringclub.org – Digital TV is a television broadcast that uses digital modulation. Through digital broadcasts, the quality of images and sounds received by the audience is much better than analog broadcasts.
No more shaded images or any form of noise (ant spots) on the TV monitor. In the era of digital broadcasting, TV viewers not only watch broadcast programs, but can also get additional facilities such as EPG (Electronic Program Guide) to find out the shows that have been and will be aired later.
All countries must have established the year of migration from analog to digital broadcasting. Developed countries in Europe and the United States have even turned off analog broadcasting (analog switch-off) and switched to digital broadcasting.
What Is Digital TV?
Digital TV is a television broadcast that already utilizes a digital signal which is also with a compression system. In terms of picture quality, digital TV is better compared to broadcasts on analog TV. Currently, it is recommended to start changing the signal to digital broadcasts so that there are no obstacles and can adjust to the provisions of existing regulations.
From its physical form, digital TV is so different from tube TV. Where in general digital TV does not have a tube shape and the size it has is also not too big. As for the weight itself, digital TV is quite light.
Digital TV is a digital broadcast feature commonly referred to as DTV. The existence of this feature will make a fairly prominent difference between digital TV and tube TV.
In order to be able to use the DTV feature, users of LED or LCD TVs need the support of a tool called a set top box or STV DVB T2. Not infrequently also the digital TV purchased is equipped with a digital video broadcasting terrestrial second generation or a DVB T2 feature.
The existence of this technology will later be able to receive digital signals until finally converted into a form of broadcast on digital TV without the need to use an external antenna like those on analog TV.
1. Definition of Digital TV
Basically, digital TV only recognizes two status conditions, namely accept (1) and no (0). This condition can be interpreted as if the digital broadcast receiving device can capture the signal, then the broadcast program will be received. Meanwhile, when the signal is not received, the broadcast image or sound will not be able to appear.
Digital TV will provide images with high definition or HD resolution up to 4K quality. In addition to images, the audio quality produced by digital TV is also better. This is because digital TV is equipped with technology such as surround sound to Dolby Audio.
Besides being able to provide clearer broadcast shows, it turns out that digital TV also provides other additional facilities. One of them is the Electronic Program Guide (EPC) which can help digital TV owners to provide an assessment of the quality of broadcasting using ratings of the television programs they are watching.
2. History of Digital TV
The history of Digital TV began when digital TV broadcasts emerged to the public in the 1990s. At that time America was encouraged to rival Japan, which introduced a high-definition television system (HDTV).
By 1987, Japan’s NHK TV Station had shown HD broadcasts with better images. Not to be left behind, the FCC, the American television broadcaster to push HDTV. Long story short, in June 1990 General Instrument Corporation (GI) an electronics company in the US announced the world’s first digital television system.
Designed by Korean-born engineer Woo Paik, the GI system displays a 1,080-line color image on a widescreen receiver and successfully transmits the information required for this image through a conventional television channel. Paik Woo-Hyun as an engineer and inventor who comes from Korea.
Paik’s contribution to digital television has been recognized through various awards until he is referred to as the “Father of HDTV”. In addition, he is the author of numerous technical papers and the inventor of more than 25 patents in the fields of digital video compression, digital transmission, and digital signal processing.
Digital TV has many advantages, including Producing images with good quality, pleasing to the eye.
Types of Digital TV
The development of television is also always innovating every time. Moreover, recently, analog model televisions such as tube televisions that use analog signals have been discontinued. A number of Digital TVs have now been shared with the display panel system used, such as LED TVs, OLEDs, and so on. Come on, get to know each type of Digital TV today.
1. LED TV
LED TVs are actually backlit LCD TVs with light-emitting diodes (LEDs), not standard cold cathode fluorescent lamps. This TV uses LED backlighting because it can make the body of the device thinner and more efficient.
2. Quantum Light Emitting Diode (QLED) TV
Quantum Light Emitting Diode or QLED TV is one of the most popular types of television on the market today. Only a few years old, quantum light-emitting diode (QLED) screens are the next generation of LCD screens. Small nanoparticles called quantum dots are emitted in LCD screens, which dramatically improve color and brightness
Compared to LCD and OLED, QLED is familiar to have superior contrast ratio and better durability. Nevertheless, the screen is quite large because of the QLED technology use. QLED TVs are more affordable than OLED TVs, ranging between LCD and OLED in price.
3. Organic Light Emitting Diode or OLED TV
This type of TV is a competitive version for LCD televisions that entered the market in 2012. Organic light-emitting diode (OLED) screens contain organic compounds that emit light in response to electricity.
Unlike LCDs, no backlight is needed because the compound itself emits light, so OLEDs can display deeper blacks than LCD screens and generally display a greater contrast ratio in ambient light. These TVs can also be thinner and lighter than LCDs because a filter layer is not required.
OLED TVs also produce less heat and require about 40% less power than LEDs or LCDs. The downside of this TV is image burn-in (when the image is paused for a long time on an OLED screen, the image can be permanently preserved or shaded).
4. Smart TV.
When deciding to buy a smart TV, then you no longer need to buy a set top box device as a digital TV broadcast capture medium. Smart TV can be used as an internet TV that is also able to provide additional programs with the support of internet connectivity.
5. Android TV
Android TV can also provide features such as Smart TVs with support for internet connectivity such as Wi-Fi. Android TV has the Android operating system, as well as those in smartphones as well as the support of certain processors. Thus, allowing Android TV users to easily connect to the Google Play Store.
Differences between Digital TV and Analog TV
Long before the existence of Digital TV, you must have been familiar with analog TV first. Analog TV is an analog device that can encode information in the form of an image with variations in the voltage and frequency of a signal. In order to enjoy every show on analog TV, you need an antenna as a medium used to capture the signal.
In actual field conditions, it turns out that the antenna layout that is getting farther and farther away from the television transmitting station can cause the signal to be received by the antenna to weaken.
So, what about after analog TV broadcasts start to turn off? You should also buy and install a set top box or buy a new one and switch directly to digital TV. For those of you who are still blind about Analog and Digital TV, here are the differences between Analog TV and Digital TV.
Differences | Analog TV | Digital TV |
|---|---|---|
| Signals Used | Analog TV will receive a signal from a UHF antenna. This will also make the signal experience various types of interference. From noise to distortion. | Digital TV already has a system that is easier to process signals. This will make digital TV more minimized the occurrence of interference. |
| Signal Capture Capability | Analog TV is highly dependent on the distance of the TV signal transmitting station. The farther the antenna is from the TV station, the more difficult the process of capturing broadcasting signals will be. | Digital TV that does not depend on the distance of the TV transmitter. Whether it’s in long distances or close, digital TV can still provide equally good image and audio quality viewing. |
| Types of TVs | It is synonymous with a larger form of TV and is often referred to as tube TV. | Digital TVs will usually use transmitter systems such as DVB T2 and smart TVs also fall into the category of digital TVs. |
| TV Features | It doesn’t have a wide variety of advanced features. | Digital TV usually already has very interactive features and schedules of events that have been or will be broadcast. |
| Image and Audio Quality | Analog TV usually does not have good image or audio quality because it depends on the signal distance. | Digital TV will usually be able to provide better image and audio quality. |
Advantages and Disadvantages of Digital TV
Through digital TV, people will benefit from high-resolution image broadcast quality and clearer sound. Not only that, the choice of television channels that can be enjoyed is also available more. The public can enjoy these benefits for free, because the process of digitizing broadcasting is carried out on free to air (FTA) broadcasting.
1. Advantages of Digital TV
The advantage of Digital TV is that the broadcast quality is more stable and resistant to interference (interference, sound and/or damaged image, shaded, etc.). This allows broadcasting with HDTV resolution more efficiently.
Digital TV also has the ability to broadcast multichannel and multi-program with more efficient use of frequency channels. Not to mention, The ability to transmit audio, video, as well as data at the same time.
2. Disadvantages of Digital TV
To get Digital TV broadcasts, it must be done with the installation of a Set Top Box (STB) or buy a new digital TV. The price of a digital broadcast device (Set Top Box) is more expensive than an analog broadcast device. Signal and the internet play a very important role, if you don’t get a signal, the image that appears is only a picture of the scene (depending on the STB used).
Meanwhile, the broadcast coverage of each region will experience a difference in the number of channels that can be watched, because not all tv stations broadcast digital broadcasts. Moving from one channel to another takes longer than analog TV needs.
