Pulse code modulation, a way evokes, Digital an analog signal in telecommunication. In this modulation the large signal at fixed time intervals, and equal measured and then quantized. The result quantized signal of the analog-to face a member from a limited set visible (for example, a number between 0 to 255). It is the members of this set with an integer expressed have can be of methods, Telecommunication, Digital for storage, retrofitting, compared to the error and send a signal on the telco channel. From my Zune on the phone, digital, system, audio, digital, sound, computer, and some players sound digital used.

the quality of the result of this modulation to the two factors depends on: the speed of sampling and the number of levels quantized. A necessary condition for the speed of sampling is that the sampling frequency more than the frequency analog signal. Also, by increasing the number of levels, quantized, digital signal equivalent to the approximation better analog signal, the primary would be. In pulse code modulation, used in CD audio sampling frequency 44. the 1kHz and the number of levels, quantized, 65536 (equivalent to 16 bits). Application in cell phone : technology lines of Zune at mobile phone on the part, such as dsp, PSP for the audio used.Order, PSP (digital system processor) the location of controls and analysis of signals, digital audio and video, in part, Detection Systems, Analog and digital.