Differences Analog TV and Digital TV
- Analog TV and Digital TV
Analog / TV Analog TV is a television that can only process analog signals. Analog television encodes image information by varying the voltage and / or frequency of the signal. The system used in NTSC analog television (National Television System Committee), PAL, and SECAM.
While Digital Television / Digital TV is a television can process digital signals and analog signals. Digital television is the development of an analog to digital broadcast system that converts information into digital signals in bits of data such as computers.
The most fundamental difference between an analog and digital television broadcasting system lies in the reception of a transmitter image. In analog systems, the further away from the television transmitter station, the signal will be weakened and the reception of the image from the station becomes bad and shaded. While on a digital system, the opposite of analog. Clear picture broadcasts can be enjoyed to the point where the signal is no longer acceptable.
- Receiving Process to User
In the process of receiving to the user, the difference between Analog TV and Digital TV is as follows:
On Analog TV, to get a television broadcast is used a signal capture device called an antenna. In analog television broadcasts, the farther the antenna is from the television transmitter station, the received signal will weaken and cause the image received by the television set to be bad and shaded.
While on Digital TV, the process of receiving the image signal, sound, and data that is using digital modulation and compression system. Modulation itself is the process of changing a periodic wave so as to make a signal capable of carrying an information. With the modulation process, an information (usually low-frequency) can be fed into a carrier wave, usually a high-frequency sine wave. The equipment for carrying out the modulation process is called a modulator, whereas the equipment for obtaining initial information information (as opposed to from the modulation process) is called a demodulator and the equipment that performs both processes is called a modem.
- How to Production
By way of production, Analog TV and Digital TV differ in the following ways:
Analog TV sets use cathode tubes as displays, while Digital TVs use flat panel displays such as LCDs, plasma, or LEDs. As a result, Analog TV tends to be bigger and thicker compared to Digital TV. Analog TV also consumes more power than Digital TV.
Resolution of Digital TV sets can be set at 480p (SD = Standard Definition) or even in 780p or 1080i / p which is known as HD or high definition. HD allows to increase the size of the TV without sacrificing the image quality on the screen. Analog TV uses SD resolution. Although there has been an attempt to implement HDTV for Analog TV, but the requirements in terms of bandwidth are too large to be impossible to implement.
In its production, Analog TV is usually limited to sizes below 30 inches as it makes the larger screen size pose a greater challenge without any noticeable advantage in image quality. While Digital TV has grown up to have a screen with a size of more than 50 inches.