RU2045097C1 - Device for multiband multichannel recording and reproduction of information from magnetic medium - Google Patents

Abstract

FIELD: radio engineering. SUBSTANCE: device for multiband multichannel recording and reproduction of information has magnetic medium 1, input wire 2, output wire 3, N recording magnetic heads 4, N reproduction magnetic heads 5, 2N band-pass filters 6 and 7, unit 8 for amplification, summing and correction of signals. EFFECT: simplified design, improved operational reliability. 1 dwg

Description

 The invention relates to techniques for magnetic recording and can be used in studio, professional and household devices for magnetic recording-playback to obtain high-quality phonograms.

 In known devices, information on a magnetic medium is recorded onto a track by one recording head and is also reproduced by one playback head [1] The combination of an appropriate working gap and the speed of the medium allows the maximum electric output of the playback head when the width of the working gap is equal to half the wavelength of the recorded frequency.

 However, equalization of the frequency response is achieved by electrical corrections of the recording and playback channels. The use of significant frequency corrections degrades the signal-to-noise ratio and increases the nonlinear distortion in the reproduced signal.

 The closest to the invention in technical essence and the achieved result is a device for multi-channel magnetic recording, containing recording and playback channels, each of which has a corresponding magnetic head magnetically coupled to a magnetic tape medium, the latter being recorded on several tracks [2] Input the device bus is connected to the recording heads through recording amplifiers, and the output of the playback heads is connected to the output bus through the amplification, summing and ktsii signals.

 The disadvantages of this device are the design complexity and insufficient quality of recording-reproduction of information due to the recording of the entire spectrum of signals with one magnetic head.

 The purpose of the invention is improving the quality of recording and reproduction of information.

 To do this, in a device for multiband multichannel recording and playback of information from a magnetic medium containing recording and reproducing channels, a magnetic recording head is installed at the output in each recording channel, magnetically connected through the working gap with the corresponding track on the magnetic medium, and the input of the recording channel is connected to the input bus, in each playback channel at the input there is a magnetic playback head magnetically connected through the working gap with the corresponding track on the magnetic carrier barely, and the output of each playback channel is connected to the input of the signal amplification, summing and correction block, the output of which is connected to the output bus, a bandpass filter is introduced into each channel, the input and output of which are connected to the channel input and output, working gaps of all magnetic heads made of different widths, and in the recording channel and the playback channel, magnetically connected to the track of this channel on a magnetic medium, band-pass filters are made with the same passband.

 The invention is illustrated by the drawing, which shows a simplified diagram of the device.

 The device contains a magnetic medium 1, input 2 and output 3 buses, magnetic recording heads 4 and playback 5, band-pass filters 6 and 7 in the recording channel and in the playback channel, respectively, and an amplification, summing and correction unit 8.

 The device operates as follows.

 The recorded frequency signal is fed to the input bus 2 and is divided into frequency subbands by bandpass filters 6 of the recording channel. From the output of the filters 6, the signals of the corresponding frequencies are fed to the inputs of the magnetic heads 4 of the record, the working gaps of which are made optimal in width for recording the signals of precisely those frequencies that are fed to them from the corresponding band-pass filters 6. The signal from each magnetic head is recorded on the corresponding track of the moving magnetic carrier 1, which achieves high quality signal recording in the entire frequency range.

 In the playback channel, magnetic playback heads 5 are installed, in which the working gaps are optimized for reproducing the corresponding frequency spectrum of the signals recorded on the respective tracks of the medium 1. The selected optimal width of each working gap of each magnetic head 5 allows reproducing the frequency spectrum of the signals with high quality, recorded on the corresponding tracks.

 From the magnetic heads 5 of the playback signals are fed to the corresponding band-pass filters 7 and then to the block 8 amplification, summation and correction of signals from the output of which the reproduced information with minimal distortion during recording and playback is fed to the output bus 3.

 High quality is ensured by separate recording and reproduction of frequency bands for which the working clearances of the magnetic heads are selected optimal.

Claims (1)

 1. DEVICE FOR MULTI-BAND MULTI-CHANNEL RECORDING AND PLAYBACK OF INFORMATION FROM A MAGNETIC MEDIA, containing recording and playback channels, a magnetic recording head is installed at the output channel in each output channel, magnetically connected through the working gap with the corresponding track on the magnetic medium, and the input of the recording channel is connected to the input bus , in each playback channel at the input, a magnetic playback head is installed, magnetically connected through the working gap with the corresponding track on a magnetic medium, the output of each playback channel is connected to the input of the signal amplification, summing and correction block, the output of which is connected to the output bus, characterized in that a band-pass filter is introduced into each channel, the input and output of which are connected to the channel input and output, working magnetic gaps heads are made of different widths, and in the recording channel and the playback channel magnetically connected to the track of this channel on a magnetic medium, bandpass filters are made with the same passband.