SU1569875A1 - Method of magnetic record-reproduction of audio signal - Google Patents

Abstract

The invention relates to the field of accumulation of information and may find application in magnetic recording-reproduction of an audio signal. The purpose of the invention is to increase the ratio of the reproduced sound signal to noise. In the process of recording, a sound signal and an auxiliary signal are applied to different recording tracks, which are formed by limiting the sound signal to the maximum, and then further amplified. During playback, the reproduced auxiliary signal is attenuated by a number of times equal to the additional gain during recording, and the reproduced audio signal is limited to a minimum. The results of limiting the reproduced sound signal to a minimum and attenuation of the reproduced auxiliary signal are then summed up, which are integrated before attenuation.

Description

The invention relates to the field of 1FL information, namely, to the methods of magnetic recording-reproduction of an eukigto signal.

or inventions — an increase in the output of the most advanced sound output.

1 shows timing diagrams characterizing the proposed magnetic recording-reproducing method of the audio signal; FIG. 2 shows an apparatus for implementing the method.

1 Magnetic recording-reproduction of a sound signal occurs as follows.

In the process of recording, a sound signal and an auxiliary signal, which is formed from the sound signal (Fig. 1a), are added to different tracks of the recording medium of the magnetic recording and are additionally amplified (Fig. 26). In this case, the formation of the auxiliary signal is carried out by limiting the sound signal to a maximum.

During reproduction, a reproduction of a sound signal from a magnetic recording medium and an auxiliary signal, which is attenuated by a number of times equal to the additional recording gain, is reproduced. In this case, before attenuating the reproduced auxiliary signal, its integration is carried out (Fig. 1c). The reproduced sound signal is limited to the minimum and summarized with the result of attenuation of the auxiliary signal (Fig. 1d). As a result of the summation of the reproduced sound signal after the restriction on the minimum (fig. D) and res

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By attenuating the auxiliary signal, a sound signal is obtained (Fig. 1e), which is the same shape as the recorded sound signal (Fig. 1a).

The device (Fig. 2) contains the first 1 and second 2 recording units mounted to record respectively on the first 3 and second 4 recording tracks of the magnetic recording carrier, double-sided limiter 5 to the maximum, additional amplifying element 6, first 7 and second 8 playback units , a two-way limiter 9 at a minimum, an attenuator 10 and a adder 11. The input of the first recording unit 1 is connected to the input bus 12 of the audio signal, which is connected to the maximum through the included two-way limiter 5 and element 6 additional gain with the input of the second recording unit 2. The first playback unit 7 is mounted to play from the first track 3 of the recording and is connected via an output through a two-way limiter 9 at a minimum to the first input of the adder 11 connected by an output to the output bus 13 of the audio signal. The second playback unit 8 is made with an integration element that compensates for the result of the differentiation during playback, mounted to play from the second track 4 of the recording and connected to the output via an attenuator 10 with the second input of the adder 1 1.

Sound recording beep

comes on the input bus 12 of the audio signal directly to the first block 1 of the recording, providing a sound signal on the first track 3 of the record. The audio signal also enters the two-way limiter 5 to the maximum, providing

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forming the auxiliary signal. The auxiliary signal passes through the additional amplifying element 6 to the second recording unit 2, which is applied to the second track 4 of the recording. The reproduced audio signal from the output of the first playback unit 7 is fed to a minimum two-way limiter 9 acting on the first input of the adder 11. The reproduced auxiliary signal from the output of the second playback unit 8 passes through the attenuator 10 to the second input of the adder 11. From the output of the adder, the reconstructed audio signal is sent on the output bus 13 beep.

Claims (1)

Invention Formula A method of magnetic recording-reproducing an audio signal by recording the recording of a magnetic recording medium and an auxiliary signal onto different tracks of the recording medium, which is pre-formed and additionally amplified, and reproducing an audio signal and an auxiliary signal that is attenuated by a number of times equal to the additional recording gain, This is due to the fact that, in order to increase the ratio of the reproduced sound signal to noise, the formation of the auxiliary signal is carried out by limiting the audio signal is maximized, before attenuating the reproduced auxiliary signal, it is integrated, and the reproduced audio signal is limited to the minimum and the results of attenuation of the auxiliary signal and the minimization of the reproduced audio signal are summed up. L vy - t eight 1 7 + - t (rig.1 eleven 13 at ten