JPS5967800A - Echo generator - Google Patents

Abstract

PURPOSE:To attain the enjoyment of stereo phonic reproduction rich in the feeling of an impression to be present in a music hall by constituting the device that delay output of each odd number of the 1st and the 2nd echo generating means in opposite in phase and the delay output of each even number is in phase. CONSTITUTION:The attenuating characteristic of all attenuators is equal and they are interlocked, and the waveform of signals A-C of the 1st echo generating means 10 is as shown in Figs. A-C. assuming the delay time of the attenuation 11, 12 to 13tau. In the 2nd echo generating section 20, the echo output of the odd number is in phase with the input and the echo of the even number is opposite in phase the input. In using the two systems of the echo generating sections 10, 20 different from the echo output characteristic, for example, the frequency of audible range is applied from an input section (output section of adder 1) and said input frequency is swept for change, then the phase difference frequency characteristic is changed complicatedly over the range of 0-360 deg., alloing to obtain an echo with spread.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a reverberation generation device, and particularly to a reverberation generation device used in a stereo reproduction device.

In order to enjoy realistic stereo playback, various attempts have been made to provide a stereo device with the reverberation effect of an actual music ball or the like. FIG. 1 is a block diagram showing one example. Left and right channel signals are added and combined by an adder 1, respectively, and input to an echo generator 2. The echo signals from the echo generator 2 are converted into positive and negative phase echo signals by the phase shifter 3, and each of the adders 4 and 5 is operated by one person.

The left and right channel 17 channel signals are input to adders 4 and 5, respectively. The left and right channel signals to which the echo signals have been added are radiated from the speakers 8 and 9 via the amplifiers 6 and 7.

In this conventional example, since a single phase shifter 3 is used, the phase difference frequency characteristics of the reverberant sounds of both 7-channels become monotonous, and a natural sense of sound expansion cannot be obtained. Furthermore, reverberant sound may be radiated from the same speaker as the main system, making it difficult to create a sense of spaciousness in the sound -C1, especially when the spin-on interval falls.

Therefore, the present invention has been made in order to eliminate the drawbacks of the conventional ones as described above, and its purpose is to generate reverberant sound that has a natural sense of spaciousness.
The object of the present invention is to provide a means for generating reverberation that allows the user to enjoy sound reproduction with a rich sense of exhilaration.

According to the present invention, the reverberation generating station has first and second reverberation generation means each receiving a common audible signal as input and generating a plurality of delayed outputs each delayed at a predetermined time interval. The present invention is characterized in that the odd-numbered delayed outputs of the generating means are out of phase with each other, and the even-numbered delayed outputs are in phase with each other.

Furthermore, it is preferable that each output of the reverberation generating means is radiated from a speaker dedicated to reverberation.

1. The present invention will be explained below using the drawings.

FIG. 2 is a block diagram of an embodiment of the present invention, in which left and right channel signals are transmitted through attenuators 31 and 32 and an amplifier 6.
．． 7 is supplied to speakers 8 and 9 via people and radiated. Further, a sum signal of the left and right channels is obtained in the adder 1, and this sum signal (Δ) becomes the single input of the adder 11.

The output tJ of this adder 11! ! The signal is applied to the adder 13 through the delay device 12 so as to have an opposite phase, and through the attenuator 14 to one horn of the adder 13, resulting in a subtraction signal (B) between the delayed output and the output of the attenuator. . The output of the delay device 12 becomes an input of the adder 11 via an attenuator 15. A three-man power adder 16 is provided to subtract the left and right channel signals from the Ishi-C1 subtraction signal (B), and the output (C) of this adder 16 is the output signal of the first reverberation generator 10. becomes.

In the second reverberation generator 20 J3, the left and right tunnel sum signal (A) is similarly input, and this signal (Δ) overlaps with the single input of the adder 21. The output of the adder 21 is applied to the adder 23 in reverse phase through the delay device 22 and the inverter 27. At the same time, it is applied to the adder 23 through the attenuator 24 and becomes the output of the adder 23, resulting in the output of the inverter 27. A stem reduction signal is obtained between the output of the attenuator 2/I and the output of the attenuator 2/I.

The output of the inverter 27 is inputted to the attenuator 25 of the qb"C adder 21. Then, in order to reduce the left and right channel signals from the output of the adder 23, a three-man power input 'Ti"a2 is applied.
6 is provided, and the output of this adder 26 becomes the output signal of the second reverberation generating section 20.

The respective outputs of the first and second reverberation generators 10 and 20 are sent to reverberation dedicated speakers 35 and 36 via amplifiers 33 and 34.
radiated from J: sea urchin.

Here, the attenuation characteristics of the attenuators of the reverb C are equal and the attenuators are configured to be interlocked, and the delay time of the delay device 12 and 22 is defined as τ. The waveforms of the signals (Δ) to (C) are as shown in FIG. 3 (Δ) to (C). In FIG. 3, or for the sake of simplicity, the input signal (Δ) is assumed to be an impulse, and the signals (B) and (C) are shown as response characteristics to the impulse. The output of the adder 13 ([ 3) contains one direct sound, so in order to remove it, use the adder 16 to process it as shown in (C).
As can be seen from the waveform in C), the first reverberation generating section 10 is
1st, 2nd, 3rd.・・・・・・Nozube-(no-work)-Deno J is composed of J: sea urchin, which is the opposite of human power.

FIG. 4 shows the operating waveforms of the second reverberation generator 20 in FIG. 2 when impulses are input, where <A) is impulse human power, (B
) is the output of the adder 23, and (C) is the output of the adder 26. In this way, the second reverberation generating section 20 is configured such that the odd-numbered echo outputs are in phase with the input, and the even-numbered echo outputs are in phase with the input.

When two systems of reverberation generators 10.20 with different reverberation output characteristics are used, for example, a frequency in the audible range is supplied from the input section (output section of adder 1), and the input frequency is swept. When the angle is changed, the phase difference frequency characteristic changes in a complicated manner over a range of 0° to 360°. When an actual musical tone signal is input, its phase difference characteristics change in a complex manner as the musical tone changes over time. 14j Close to 11 to obtain a naturally expansive reverberation. In addition, we have installed speakers dedicated to reverberation, '35.36 ('35.36', which emit QJ separately from the main system speakers 8 and 9, so there is no unnatural sense of spaciousness in the high range, and the sound is very realistic. .

1! A better sense of spaciousness can be obtained by placing the reverberant speakers to the side of the listener.

1st verse 1'l for the direct sound of both balances 10.20
The reason why the phase difference between the output phases 7i and 7i is 180° and they are not in phase is because the energy of the echo output of the first one is the largest compared to that of the other outputs, and this is due to the reverberation effect. This is noticeable and the audibility is good.

FIG. 5 shows another embodiment of the wooden valve, which is designed to have a cylindrical element of +7a compared to the example shown in FIG. The added sieve output of adder 1 is sent to adder 11 with reverse phase and 1. [J, sea urchin applied,
The output of the delay device 12 is supplied to the adder 11 via the 7-tputenator 15. The output of the delay device 12 becomes the output of the first reverberation generating section 10 via the j' denator 18.

The output of the adder 1 also serves as the output of the adder 21, and the output of the delay device 22 is applied to the other inputs of the adder 21 via an attenuator 25 so as to have an opposite phase. The output j of the delay device 22 is connected to the second residual g generating section 2 via the attenuator 28.
The output will be 0.

The left and right channel signals are respectively introduced into amplifiers 6.7 with opposite phases, and the outputs of the first and second reverberation generators are introduced into amplifiers 33 and 34, respectively, and are radiated from separate speakers. has been done.

In this example, the attenuation characteristic of attenuator 15.25 is q
and that of attenuator 18.28 (1-o”)/g
If the attenuators are set to
and 'Cej' as the output of the second reverberation generator.

As shown in Section 2, according to the present invention, the reverberation characteristics are the actual design.
Since it is possible to obtain a very realistic sound field that approaches that of a room, etc., it is particularly effective when trying to enhance reverberation in a car stereo device, listening room, etc.

[Brief explanation of the drawing]

Figure 1 shows a conventional stereo system that produces reverberation effects.
FIG. 2 is a block diagram of one implementation of the present invention (column block diagram,
Figures 3 and 4 show the behavior of the circuit in Figure 2.
The figure shows a block [71-r] of an embodiment of the pond of the present invention. Explanation of symbols of main parts 10... Reverberation generating section 12 of box 1... Delay unit 20... Second reverberation generating section 22... SuY deadly weapon 35.36...Reverberation speaker applicant
Patent attorney Motohiko Fujimura - 6, agent of PiAnia Co., Ltd.

Claims (3)

[Claims] (1) first and second reverberation generation means each receiving a common audible signal as input and generating a plurality of reverberation horns each delayed at a predetermined time interval with respect to a predetermined input; 1. A reverberation generating device characterized in that the delayed outputs of the odd-numbered units [1] of the reverberation generating means are in opposite phases to each other, and the delayed outputs of the even-numbered units are in phase with each other. (2) Reverberation generation 8! according to claim 1, characterized in that the first delayed output of the first reverberation generation means has a phase opposite to the predetermined input. ! i question. (3) The scope of the patent nj1 is characterized in that each output of the reverberation generating means is transmitted from a speaker exclusively for reverberation! ! The reverberation generating device according to item 1 or 2.