What is the difference between digital and analog?
In many ways, there is a difference between digital and analogue difference between scene description and photography. Analog technology revolves around the formation of copies of wave patterns and then plays them as an output. Digital technology is based on the use of wave signals and their converting to digital format. When playing, the digital signal uses the recorded data to replicate the original wave.
To understand the real difference between digital and analogue, it is important to know a little more about this technology. The first real electric digital signal was used in telegraph lines, but the technology did not enter the mainstream until the mid -20th century. Analog signals, on the other hand, have existed for hundreds of years, but the oldest forms were very basic or impossible to reproduce. Analog went mainstream at the end of the 18th century with the invention of a phonograph and film.
Analog signals are copies of other signals. This copy is created by measuring vibration waves using a recorder. These wavesThey are recorded in a separate analogy wave, such as groves, such as recording, or electrical pulses such as waves for cassette tapes. When these waves are played, the analogy wave is transferred back to visual or auditory waves.
digital signals take the same waves vibrations and convert them into a binary code. The code contains data that describes the form of the original wool. This binary code can be stored as any other computer data. When the code is played, the binary code is used as a template to create a new wave.
in a perfect environment - an environment that has no noise interference and unlimited storage - the types of signal will be almost identical to each other and the original signal. The environment like this really does not exist, so degradation of the signal between the two types is common. The baseline between the digital and the analog way is the way the signals interfere with interference and background noise.
in a typical PRThe difference is easier to digital and analog records. While analog signals are generally closer to the original sound, artifacts and background noise are often also printed. This is caused by hiss and discoveries while listening to playback. Digital signals have a cleaner sound, but often lose some particularly high and low signals common in recording made by man. The recording device often simply ignores these signals as a way to save space for recording.
The last main difference between digital and analog signal is data content. Analog signal is a dense collection of audio and image waves. These waves contain a lot of information, but nothing outside the original waves. A digital signal may contain any type of data that can be compressed into computer information. This additional information can literally be anything from signal -related information to completely unrelated data.