JPH0385009A - Sound signal reproducing device - Google Patents
Sound signal reproducing deviceInfo
- Publication number
- JPH0385009A JPH0385009A JP1221297A JP22129789A JPH0385009A JP H0385009 A JPH0385009 A JP H0385009A JP 1221297 A JP1221297 A JP 1221297A JP 22129789 A JP22129789 A JP 22129789A JP H0385009 A JPH0385009 A JP H0385009A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- high frequency
- frequency component
- adjustment
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005236 sound signal Effects 0.000 title claims abstract description 31
- 230000003321 amplification Effects 0.000 claims abstract description 8
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 8
- 238000009499 grossing Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 1
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 1
- 210000003127 knee Anatomy 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
の
本発明は、音声信号を再生する装置の音質制御（トーン
コントロール）に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to tone control of an apparatus for reproducing audio signals.
従」己４皮査−
従来の典型的なステレオ音声再生装置は第２図のような
溝底となっている。左右の音声信号は音声信号処理回路
１に入り、高音部（トレブル）調整回路２、低音部（バ
ス）調整回路３、左右バランス調整回路４、音量（ポリ
ウム）調整回路５により各調整が行われた後、各増幅回
路６．７により増幅され、左右スピーカ８．９から音声
として出力される。この音声信号処理回路１における各
調整回路２．３．４． ５はすべて電圧により制御され
ており、その制御電圧は基準直流電圧１１を可変抵抗器
１０ａ、 １０ｂ、 １０ｃ、 １０ｄで分圧すること
により得ている。A typical conventional stereo sound reproduction device has a groove bottom as shown in FIG. The left and right audio signals enter an audio signal processing circuit 1, and are adjusted by a treble adjustment circuit 2, a bass adjustment circuit 3, a left/right balance adjustment circuit 4, and a volume (polyum) adjustment circuit 5. After that, the signal is amplified by each amplifier circuit 6.7 and output as audio from the left and right speakers 8.9. Each adjustment circuit 2.3.4 in this audio signal processing circuit 1. 5 are all controlled by voltage, and the control voltage is obtained by dividing the reference DC voltage 11 by variable resistors 10a, 10b, 10c, and 10d.
この可変抵抗器１０ａ、１０ｂ、 １０ｃ、 １０ｄの
各抵抗値は、使用者が任意につまみ等を調節することに
より変更する。The resistance values of the variable resistors 10a, 10b, 10c, and 10d are changed by the user by adjusting knobs or the like.
と る
電気的に周波数特性を低域から高域まで十分フラットに
増幅しても、スピーカにより再生したときには、聴感上
、高域成分が不足して聞こえる。Even if the frequency response is amplified electrically to make it sufficiently flat from low to high range, when played back through a speaker, the high range component will be audibly lacking.
このため、従来、音源が音楽である音声信号（音楽ソー
ス）を処理する場合には、音声信号処理回路で高域成分
を強調して、このような聴感特性を補償するようになっ
ていることが多い。For this reason, conventionally, when processing an audio signal (music source) whose sound source is music, the audio signal processing circuit emphasizes the high-frequency components to compensate for such auditory characteristics. There are many.
しかし、このような設定にしたままでドラマやニュース
等のソースを処理した場合、これらのソースにはあまり
高域成分が含まれていないため、ノイズばかりが強調さ
れて逆に聞きづらいものとなる。従って、従来の装置で
は、ソースに応じて高域調整の設定を変更する必要があ
った。However, if you process sources such as dramas or news with these settings, since these sources do not contain much high-frequency components, only noise will be emphasized, making it difficult to hear. Therefore, in conventional devices, it was necessary to change the high frequency adjustment settings depending on the source.
本発明はこのような問題を解決し、自動的に高音域のト
ーンコントロールを行う音声信号再生装置を提供するこ
とを目的とする。SUMMARY OF THE INVENTION An object of the present invention is to solve such problems and provide an audio signal reproducing device that automatically performs tone control in the high frequency range.
めの
上記目的を達成するため、本発明の音声信号再生装置で
は、入力音声信号の高域側を通過させる高域フィルタと
、高域フィルタの出力を、その強さに応じた制御信号に
変換する制御信号生成手段と、該制御信号に応じて、前
記入力音声信号の高域側の増幅を行う高域増幅回路とを
備えることを特徴とする。In order to achieve the above object, the audio signal reproducing device of the present invention includes a high-pass filter that passes the high-frequency side of the input audio signal, and converts the output of the high-pass filter into a control signal according to the strength of the high-pass filter. and a high-frequency amplification circuit that amplifies the high-frequency side of the input audio signal in accordance with the control signal.
注ニー用−
本音声信号再生装置に入力した音声信号は、高域フィル
タを通・され、その高域部（高音部）が取り出される。Note: For knee use - The audio signal input to this audio signal reproducing device is passed through a high-pass filter, and its high frequency portion (treble portion) is extracted.
制御信号生成回路は、この高域部の強さに応じた制御信
号を生成する。そして、高域増幅回路は、この制御信号
に応じて、上記入力音声信号の高域部を増幅する。すな
わち、高域増幅回路は、入力音声信号の高域成分のレベ
ルの大小に応じて、高域部の増幅度を大小させる。The control signal generation circuit generates a control signal according to the strength of this high frequency range. Then, the high-frequency amplifier circuit amplifies the high-frequency portion of the input audio signal according to this control signal. That is, the high-frequency amplifier circuit increases or decreases the degree of amplification in the high-frequency range depending on the level of the high-frequency component of the input audio signal.
去Ｊ虻例−
第１図は本発明を実施したステレオ音声再生装置のブロ
ック図であり、前述の従来の装置に、本発明に係る回路
を付加したものである。第１図中、従来の装置（第２図
）と同様の回路には同じ番号を付した。EXAMPLE FIG. 1 is a block diagram of a stereo audio reproduction device embodying the present invention, which is obtained by adding a circuit according to the present invention to the conventional device described above. In FIG. 1, circuits similar to those of the conventional device (FIG. 2) are given the same numbers.
本実施例の装置では、左（Ｌ）右（Ｒ）の入力音声信号
は、まず、加算回路１２で加えられ、（Ｌ＋Ｒ）信号と
される。この（Ｌ＋Ｒ）信号は高域通過フィルタ１３を
通され、高域成分のみが取り出される。ここで、この高
域フィルタ１３は、不要成分（ノイズ）を除去するため
、音声信号以上の高域成分を除去するような高域帯域フ
ィルタ（例えば、通過域が２〜１５ｋＨｚ）としてもよ
い、この高域通過成分は、整流回路１４及び平滑回路１
５により高域成分のレベルに応じた直流電圧に変換され
る。平滑回路１５から得られた直流電圧は、増幅回路１
６で増幅されて高域（トレブル）調整回路２の制御電圧
となる。In the device of this embodiment, left (L) and right (R) input audio signals are first added in an adder circuit 12 to form a (L+R) signal. This (L+R) signal is passed through a high-pass filter 13, and only high-frequency components are extracted. Here, in order to remove unnecessary components (noise), the high-pass filter 13 may be a high-pass filter (for example, with a pass band of 2 to 15 kHz) that removes high-frequency components higher than the audio signal. This high-pass component is transmitted to the rectifier circuit 14 and the smoothing circuit 1.
5, it is converted into a DC voltage according to the level of the high frequency component. The DC voltage obtained from the smoothing circuit 15 is applied to the amplifier circuit 1.
6 and becomes the control voltage for the high frequency (treble) adjustment circuit 2.
音声信号処理回路１に入力した左右の音声信号は、まず
、トレブル調整回路２で増幅回路１６による制御電圧及
び可変抵抗器１０ａを用いたマニュアル調整による制御
電圧により高音域が調整される。The left and right audio signals input to the audio signal processing circuit 1 are first adjusted in the treble range by the treble adjustment circuit 2 using a control voltage by the amplifier circuit 16 and a control voltage manually adjusted using the variable resistor 10a.
その後は、従来通り、低音（バス）３、バランス４、ボ
リウム５の各調整回路でマニュアル調整され、増幅回路
６．７を通してスピーカ８．９から音声として出力され
る。Thereafter, as before, manual adjustments are made using the bass 3, balance 4, and volume 5 adjustment circuits, and the sound is output as audio from the speaker 8.9 through the amplifier circuit 6.7.
ここで、増幅回路１６の増幅度は、トレブル調整回路２
の動作電圧及びソース別の高域特性を考慮して、適当な
値に定める。また、増幅回路１６及びマニュアル可変抵
抗１０ａとトレブル調整回路２との間に各々配置された
抵抗Ｒ１、Ｒ２は、両調整間のバランスを定めるもので
ある。Here, the amplification degree of the amplifier circuit 16 is equal to the amplification degree of the treble adjustment circuit 2.
Set to an appropriate value, taking into account the operating voltage and high-frequency characteristics of each source. Further, resistors R1 and R2, which are respectively arranged between the amplifier circuit 16 and the manual variable resistor 10a and the treble adjustment circuit 2, determine the balance between both adjustments.
このようにすることにより、スピーカ８．９からの音声
出力では、音声信号入力の高域成分の大きさに応じた高
域特性を自動的に得ることができる０例えば、音楽ソー
スのように低域から高域まで広い範囲にわたる成分を有
する場合には、フラットに再生したり、あるいは聴感補
正のために高域を強調したりして豊かな音質を得ること
ができ、ドラマ・ニュース等のソースのように高域成分
が少ない場合には、高域ノイズを有効に抑圧することが
できる。By doing this, the audio output from the speakers 8.9 can automatically obtain high-frequency characteristics according to the magnitude of the high-frequency components of the audio signal input. If the components have a wide range from low to high frequencies, it is possible to obtain rich sound quality by playing them flat or by emphasizing the high frequencies for auditory correction. When there are few high frequency components as in the case of , high frequency noise can be effectively suppressed.
なお、通常のステレオ音声信号では左チャンネルと右チ
ャンネルの位相及びレベルが全く異なることはほとんど
ないので、上記実施例では、左右両チャンネルを加えた
信号（Ｌ＋Ｒ）について両チャンネルのトレブル調整を
行ったが、もちろん、左右信号の高域成分のレベルを独
立に取り出し、各々のトレブル調整に用いてもよい。Note that in a normal stereo audio signal, the phases and levels of the left and right channels rarely differ at all, so in the above embodiment, treble adjustment was performed for both channels for the signal (L+R) that is the sum of both left and right channels. However, of course, the levels of the high frequency components of the left and right signals may be extracted independently and used for each treble adjustment.
発」Ｒと４呆。"R" and 4 dumbfounded.
以上説明した通り、本発明によれば、入力音声信号の含
む高域成分のレベルに応じて高域成分の増幅度を調整す
るため、入力のソースに応じて聴感補正及びノイズ抑圧
のための高域増幅度調整が自動的に行える。As explained above, according to the present invention, the degree of amplification of the high frequency component is adjusted according to the level of the high frequency component included in the input audio signal. Range amplification adjustment can be performed automatically.
第１図は本発明を実施したステレオ音声信号処理回路の
ブロック図、第２図は従来のステレオ音声信号処理回路
のブロック図である、
１０ａ、 １０ｂ、 １０ｃ、 １０ｄ・・・マニュア
ル調整用可変抵抗出
代
願人
シャープ株式会社
埋入
佐野 静夫
第１図FIG. 1 is a block diagram of a stereo audio signal processing circuit embodying the present invention, and FIG. 2 is a block diagram of a conventional stereo audio signal processing circuit. 10a, 10b, 10c, 10d... Variable resistors for manual adjustment Applicant Sharp Corporation Shizuo Sano Figure 1
Claims (1)
と、 高域フィルタの出力を、その強さに応じた制御信号に変
換する制御信号生成手段と、 該制御信号に応じて、前記入力音声信号の高域側の増幅
を行う高域増幅回路と を備えることを特徴とする音声信号再生装置。(1) a high-pass filter that passes the high-frequency side of the input audio signal; a control signal generating means that converts the output of the high-pass filter into a control signal according to its strength; An audio signal reproducing device comprising: a high-frequency amplification circuit that amplifies the high-frequency side of an input audio signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1221297A JPH0385009A (en) | 1989-08-28 | 1989-08-28 | Sound signal reproducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1221297A JPH0385009A (en) | 1989-08-28 | 1989-08-28 | Sound signal reproducing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0385009A true JPH0385009A (en) | 1991-04-10 |
Family
ID=16764581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1221297A Pending JPH0385009A (en) | 1989-08-28 | 1989-08-28 | Sound signal reproducing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0385009A (en) |
-
1989
- 1989-08-28 JP JP1221297A patent/JPH0385009A/en active Pending
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