Q:

What is the difference between digital and analog?

A:

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.

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.


Is this answer helpful?

Similar Questions

  • Q:

    What are the advantages of an indoor digital antenna?

    A:

    The primary advantage of having an indoor digital antenna is not having to pay a monthly cable bill because these antennas allow viewers to watch many network stations from over-the-air broadcasts. Other advantages include having continuous television reception if the cable or satellite provider is offline and having access to networks when conflicts arise with a cable provider.

    Full Answer >
    Filed Under:
  • Q:

    How does digital television work?

    A:

    Digital television uses a digital signal that is sent from a digital channel. This signal is condensed into a single program or multiple subchannels to allow for multibroadcasting of different programs. Digital television allows broadcasters to show their programs on three different resolution rates, which are 480, 720 and 1080, at 60 frames per second.

    Full Answer >
    Filed Under:
  • Q:

    What is the USB port in my digital cable box for?

    A:

    The USB port in a cable box can have several uses. It can be used for connecting streaming sticks, such as a Roku or Chromecast, to your TV. These devices allow streaming of on-demand media from providers like Netflix, Hulu, YouTube and Amazon. Many people use these devices in addition to paid cable to gain access to movies, music and television programming that would be otherwise unavailable to them.

    Full Answer >
    Filed Under:
  • Q:

    How do you connect a home theater to a digital cable box?

    A:

    There are generally three options to hear audio from a cable box on a home theatre system. They are HDMI, optical audio and RCA audio.

    Full Answer >
    Filed Under:

Explore