How do operators transmit analog to digital signal?

At the end of the 20th century, many countries began to convert sound and video broadcasting or sound and images, from analog to digital signal technology. Traditional analog broadcasts used for radio and television broadcasting since the beginning of the 20th century have used a continuous signal reminiscent of waves passing through water. An analog for digital signal processing was possible using the sampling technology, which converted the waves of the signal into a number of numbers.

Analog signal sampling can be described as many repeated wool images and convert each frame to a digital signal using a zero series and those called binary numbers. The resulting numbers were transmitted as broadcasting and converted back to analog signals by television or radio. Digital programming could be sent via an analog signal and some countries did it at the end of the 20th century. The advantage was the use of a fully compressed signal of binary numbers due to the amount of information that would be sent through a much smaller frequency rangeh or bandwidth.

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digital compression has used a number of different technologies, but each frame took a typical compression system or one broadcast frame and converted it from analog to digital signal. The system looked at the next framework and compared it to the previous one. Only parts of the image that changed, such as a moving object or changing color, were transmitted. This process was repeated constantly; Because only changes in the picture were handed over, much less data was required.

adequate sampling and correction of errors, a technique used to eliminate digital values ​​that did not fit the signal were needed for a successful analog digital signal. From the random noise of the signal that occurred during transmission, errors could occur and the signal control software was developed, the ALSO techniques are used in compact disk devices (CD) to remove the signal errors that occurred from the Wscratches or age. Digital broadcasting signals were an advantage for companies for many reasons. In many countries, the widths of the zone of radio and television signals or frequencies available for broadcasting were limited; The broadcast had to compete with frequencies used for emergency services, wireless telephone and radio signals and many other uses. Converting from analog to digital signaling, combined with data compression, has allowed broadcasting to send more information and better video at the same frequencies.

At the end of the 20th century, it brought interest in high -resolution television (HD) to provide improved quality of the transmitted image. PRACKS could send more data to a digital signal than for analogue, causing improvement of HD at the same time as digital. Adding a signal compression that allowed the sending of a higher density signal was further improved by the signal quality of the wistering bandwidth.

Internet communication growth has become a market for digital transmittedbecause the signals were easily sent to viewers via existing high -speed connections. Films on request, Internet radio and other markets have expanded at the beginning of the 21st century, all used digital signals, benefit operators and provide consumers with many other options. Customers in distant areas have gained the advantage of digital programming; Analog TV signals became weaker when the receiving antenna moved further from the transmission tower. The digital TV converts the values ​​back to a high quality image if you can receive a signal. Customers can see the same picture on a TV that a local customer receives because the distance does not deteriorate the image.