about a century, since the 80s of the XIX century, for home music used records that, despite the many improvements, not fundamentally changed.
mechanical reading of the signal from the spiral track was the main method of work of reproducing equipment for decades.Widespread and magnetic media, and coil the tape cassette, but the original source of the signal recorded on them usually serving acetate and vinyl records.
situation changed only when the first laser discs.
In the early eighties in the Soviet Union, rumors began to circulate that the West in the course of some CD players.How do they work like almost no one knew.Some people with particularly luxuriant imagination assumed that in them instead of the usual head with a needle on the tonearm Player installed radiation source that reads music from usual LP.Those who traveled abroad, seamen, diplomats and other "visiting", it was already known that this audio equipment is arranged differently.
the end of the eighties, the country started to bring the first laser discs.When were these "miracles of technology", they were very expensive, and the simple music fan were not available.Most often, the owners of the cooperative bought their "recording studios" for commercial purposes.Music programs are replicated with the Compact Cassette with hitherto unprecedented quality.
When this revolution has occurred in the technology record, which resulted in replacing the conventional gramophone record came first laserdisc?When there were technologies that enable them to produce?The idea of an optical information carrier is patented in 1958 and is reflected in the reader punched cards and punched.The principle is simple.To receive, transmit, and store any amount of data in binary rather like Morse code.
During the second half of the 70s have been solved many technological problems, which resulted in the appearance of the first laser discs.Date of commencement of sales outlets - 1982 - marked the ousting of vinyl record from the market.
Like any other information to be encoded music.At the same time the accuracy of the reproduction depends on the quantization step, which is now called the bitrate.Ultimately, the higher the quality, the greater the number of bytes will occupy the audio program in digital form.According to this principle of SONY and PHILIPS began to develop the first laser discs.When there were CD-DA (digital audio CDs), they were intended for one purpose - to write music.
Buyers did not know all the technical details, they were important consumer qualities of the new product, and they were impressive.The ability to program your favorite artists play an infinite number of times without degradation of sound, small size, excellent quality - all these advantages combined in plates, iridescent iridescent glow.
skilled in the same technical characteristics of the new type of media talked about a lot.Its capacity then was 0.65 GB, thus ensuring the sound 74 minutes of music in outstanding quality.
immediately any ideas on how they can be used the first laser discs.When the opportunity to encode record, the idea of the use of technology to record video.The first film, released in the format of Video CD, became famous thriller "Jaws."However, according to the main quality indicators "picture" about consistent magnetic recording in VHS videotapes, but Down and Out the trouble started ...
now widely used laser discs much larger capacity, Digital Versatile Disc (DVD) and Blue Ray, including multilayer.Further improvement of the optical-digital media is going in the direction of technology development FMD-ROM, which is based on fluorescent properties of substrate.The capacity of these discs can reach 140 GB.
