JPH02108500U

JPH02108500U -

Info

Publication number: JPH02108500U
Application number: JP1576489U
Authority: JP
Priority date: 1989-02-15
Filing date: 1989-02-15
Publication date: 1990-08-29

Description

[Brief explanation of drawings]

第１図はスペクトルアナライザ回路を利用して
構成した本考案の疑似ステレオ信号作成回路の１
実施例を示すブロツク図、第２図は同上実施例に
おける帯域周波数特性を示す図、第３図はグラフ
イツクイコライザ回路を利用して構成した本考案
の疑似ステレオ信号作成回路の１実施例を示すブ
ロツク図、第４図は同上実施例における帯域周波
数特性を示す図である。１……スペクトルアナライザ回路、４_１〜４_４……帯域フイルタ、１１，１２……加算器、３１
Ｌ……Ｌチヤンネル用のイコライザ回路、３１Ｒ
……Ｒチヤンネル用のイコライザ回路、３３_１〜
３３_５……帯域レベル調整回路、３４……レベル
可変制御回路、３５……周期調整つまみ、ｆ_１〜
ｆ_５……各帯域の中心周波数。 Figure 1 shows one of the pseudo stereo signal generation circuits of the present invention configured using a spectrum analyzer circuit.
FIG. 2 is a block diagram showing the embodiment; FIG. 2 is a diagram showing the band frequency characteristics of the same embodiment; FIG. 3 is an embodiment of the pseudo stereo signal generating circuit of the present invention constructed using a graphic equalizer circuit. The block diagram, FIG. 4, is a diagram showing band frequency characteristics in the same embodiment. 1...Spectrum analyzer circuit, 4 ₁ to 4 ₄ ... Bandwidth filter, 11, 12 ... Adder, 31
L... Equalizer circuit for L channel, 31R
...Equalizer circuit for R channel, 33 ₁ ~
33 ₅ ...Band level adjustment circuit, 34...Level variable control circuit, 35...Period adjustment knob, f1 _~
_f5 ... Center frequency of each band.

Claims

[Claims for Utility Model Registration] (1) In a spectrum analyzer circuit that divides an audio signal into a plurality of predetermined different frequency bands and displays the signal level for each of the divided bands, a first signal adding means for mixing output signals of a predetermined band among the plurality of bands and outputting the mixture as a pseudo stereo signal of one channel; and mixing output signals of another predetermined band among the plurality of bands. 1. A pseudo-stereo signal generating circuit comprising: second addition means for outputting the pseudo-stereo signal of the other channel. (2) In a graphic equalizer circuit that divides the audio signals of the left and right channels into a plurality of predetermined different frequency bands, and adjusts the signal level for each divided band to adjust the sound quality of the left and right channels. , a level variable control means is provided for freely varying the signal level of each band of the left and right channels divided into the plurality of bands, and the signal level of a predetermined band of one channel and the signal level of the other predetermined band are adjusted. In addition to controlling the increase and decrease alternately at a predetermined period, the output signal level of each band of the other channel corresponding to each band to be increased and decreased is alternately controlled at the same period so that the direction of increase and decrease is opposite to that of the channel. A pseudo-stereo signal creation circuit characterized by increasing/decreasing control.