Digital information is stored using two discrete values, while analog information is typically stored using nondiscrete signals. Since the advent of digital technology, the term "analog" has been used to refer to nondigital storage and transfer technology.Continue Reading
A common example of analog information is vinyl records. Peaks and valleys on an album represent different sounds, and the player's needle responds when the record spins. Cassette tapes, another form of analog information storage, rely on a magnetized medium, and stronger and weaker magnetic signals represent different sounds.
Digital technology uses two values, often referred to as 1 and 0, to store information. These signals can be stored as magnetized and nonmagnetized regions on a hard drive; they can also be stored as microscopic grooves on CDs. Many media used to store analog information can store digital information as well. Tape backup devices, for example, use technology similar to cassette tapes to store the 1s and 0s used for digital information.
One of the primary advantages of digital technology is that information can be preserved and copied perfectly. Many analog media degrade over time, and quality invariably drops when information is copied. Digital information can also be sent over computer networks and the Internet, which has contributed to the widespread popularity of digital information. In addition, digital information can be compressed, so it takes up less space and transfers faster.Learn more about Television & Video
To receive free digital television signals, install an antenna that receives both VHF and UHV channels, and if watching a television made before 2007, plug in a converter box to change the digital signal to analog. Different antenna styles are suitable for areas receiving strong or weak signals.Full Answer >
The difference between analog and digital signals is that an analog signal is a continuous electrical message while digital is a series of values that represent information. Analog is conveyed by electrical current variations. Digital signals are relayed as a series of values that a device can read, such as a digital television.Full Answer >
Because of the transition from an analog signal to a digital signal, connecting two televisions to one cable is only possible with a small amount of cable providers as of 2015. Most television providers broadcast with a digital signal that requires a device to be connected to each television.Full Answer >
Differential pulse code modulation is a technique of analog to digital signal conversion. This technique samples the analog signal and then quantizes the difference between the sampled value and its predicted value. It then encodes the signal to form a digital value.Full Answer >