What is a receiver?

The receiver is a multichannel amplifier fordecoding of audio streams and digital video signal. Main application: for amplification of sound, decoding in home theater systems. The receiver survived its technological birth in the late twenties of the twentieth century, when radio broadcasting reached its peak.

What is the receiver and how did it look during the periodits development? The radio and amplifier integrated into a single unit is called "receiver", which means "receiver". He has a huge popularity among music lovers, greedily listening to live performances of their favorite artists, and waiting with impatience to release new singles.

During the development of home acoustic systems, hefound a new application. First, it began to add the simplest processors, allowing you to work with the audio signal, adding the effect of volume, and later the encoding of the video signal. This significantly increased the quality of the broadcast. The development of recording a multichannel audio track began. This was required for the rapidly developing film industry, which requires more and more high-quality sound.

What is the receiver and its operating principles? Receiving the echo effect, the viewer first hears the sound coming from the screen, and after a certain time (delay) it is already enveloped by sound from the sides and back of the cinema hall. All this work is done by the receiver.

One of the developers of the novelty was the laboratoryDolby. Completely changing the principles of recording audio tracks, starting to record the sound in the form of a mathematical matrix, encoding it on two stereo tracks for four channels (and subsequently five and eight). To properly distribute the audio data in the receiver began to embed decoders, and its modified model was called AV-receiver. The receiver for video transmission processes, digitizing information into one stream, packs and compresses for transmission.

What is a receiver and how does it differ fromthe usual sound amplifier? A conventional amplifier has only two amplification channels, while the AV receiver has more than two channels. It involves connecting the loudspeakers of the center, right and left channels, left and right surround channels. This is how the 5.1-receiver system looks.

Receiver 7.1 has already two channels of left and right surroundings. The number one in the abbreviation indicates the low-frequency range channel. The signal is applied to the subwoofer, but the receiver does not amplify this channel, since the signal goes to the output level.

How to choose a receiver and not be trapped? First of all, we need to determine the desired power for amplification. But this question, rather, individual, it is not subject to consideration. As the saying goes: "No matter how much you take, it's still not enough." The most important aspect, which is worth paying attention to is the transformer of sound amplification. It is best to buy a receiver with a toroidal transformer. It has, as a rule, greater power output in comparison with the traditional solution and with the same dimensions. He is not so hot at work.

There are discrete and integrated circuitsconstruction of the receiver. The discrete circuit consists of transistors, and the integral circuit is built on microcircuits. The integrated circuit of construction is used by budget models and receivers in a fashionable, ultrathin solution. Recently, digital receivers have been in demand, featuring high power, an intuitive interface and easy setup right from the control panel. When choosing a lot of attention should be paid to the terminals of the connection with the speakers. It is desirable that they are screwed, which will significantly improve the sound quality.

The AV receiver has a standard set of AV inputs andoutputs. It supports analog audio, digital audio, S-video, SCART, HDMI, component video, composite video. XLR connector is used only in expensive models.

There are also specialized receivers forprofessional sound processing, but to describe them in an article about what a receiver is, does not make sense. They are not accessible to the common man in the street at the price and are not needed because of specialized and redundant functionality.