JPH0461999U

JPH0461999U -

Info

Publication number: JPH0461999U
Application number: JP10529190U
Authority: JP
Priority date: 1990-10-08
Filing date: 1990-10-08
Publication date: 1992-05-27

Description

[Brief explanation of drawings]

第１図及び第２図はこの考案に係る車載用音響
装置の実施例を示し、第１図は回路ブロツク図、
第２図はこの考案の他の実施例の回路ブロツク図
である。第３図は従来例を示す図である。主な符号の説明、１……信号処理部、２，３，
４……ＬＰＦ（ローパスフイルタ）、ＳＷ_１，Ｓ
Ｗ_２，ＳＷ_３……スイツチ、ａ，ｂ，ｃ……加算
回路、Ｌｉｎ……レフトチヤンネル入力端子、Ｒ
ｉｎ……ライトチヤンネル入力端子、ＦＬｏｕｔ
……フロントレフトチヤンネル出力端子、ＦＲｏ
ｕｔ……フロントライトチヤンネル出力端子、Ｒ
Ｌｏｕｔ……リヤーレフトチヤンネル出力端子、
ＲＲｏｕｔ……リヤーライトチヤンネル出力端子
。 1 and 2 show an embodiment of the in-vehicle audio device according to this invention, and FIG. 1 is a circuit block diagram,
FIG. 2 is a circuit block diagram of another embodiment of this invention. FIG. 3 is a diagram showing a conventional example. Explanation of main symbols, 1...Signal processing section, 2, 3,
4...LPF (low pass filter), SW ₁ , S
_W2 , _SW3 ...Switch, a, b, c...Addition circuit, Lin...Left channel input terminal, R
in...Light channel input terminal, FLout
...Front left channel output terminal, FRo
ut...Front light channel output terminal, R
Lout...Rear left channel output terminal,
RRout...Rear light channel output terminal.

Claims

[Claims for Utility Model Registration] 1. A signal processing unit that generates 4-channel signals from left channel and right channel input signals;
a low-pass filter that extracts a predetermined frequency from the left channel input signal and the right channel input signal, and an adder circuit that adds the left channel output of the low-pass filter to the rear left channel signal of the signal processing section and outputs the resultant signal, An in-vehicle audio device characterized in that the right channel output of the signal processing unit is added to the rear light channel signal of the signal processing unit using an adder circuit and outputted. 2. A signal processing unit that generates 4-channel signals from the left channel and right channel input signals;
The sum of the left channel input signal and the right channel input signal is added to the adder circuit and sent as a monaural signal to the low-pass filter.The low-pass filter extracts a predetermined frequency and adds the signal to the rear left channel signal and rear right channel signal, respectively. An in-vehicle audio device characterized in that it is configured to perform addition and output using a circuit. 3. The vehicle-mounted audio device according to claim 1 or 2, further comprising a switch means between the low-pass filter and the addition circuit.