JP2591472Y2 - Sound signal processing device - Google Patents
Sound signal processing deviceInfo
- Publication number
- JP2591472Y2 JP2591472Y2 JP1992073586U JP7358692U JP2591472Y2 JP 2591472 Y2 JP2591472 Y2 JP 2591472Y2 JP 1992073586 U JP1992073586 U JP 1992073586U JP 7358692 U JP7358692 U JP 7358692U JP 2591472 Y2 JP2591472 Y2 JP 2591472Y2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- human voice
- sound field
- frequency band
- sound
- 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.)
- Expired - Lifetime
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Description
【０００１】[0001]
【産業上の利用分野】本考案は、特にボーカルを中心と
した音楽やスポーツの実況中継等の音場拡大処理に適し
た音響信号処理装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an acoustic signal processing apparatus which is particularly suitable for sound field expansion processing such as a live broadcast of music or sports centering on vocals.
【０００２】[0002]
【従来の技術】従来の音響信号処理装置１００は、例え
ば図１０に示すように左チャンネル（以下、Ｌｃｈとい
う。）入力端子１０１及び右チャンネル（以下、Ｒｃｈ
という。）入力端子１０２と、加算器１０３乃至１０５
と、位相シフト回路１０６と、Ｌｃｈ及びＲｃｈ出力端
子１０７，１０８とにより構成されていた。2. Description of the Related Art As shown in FIG. 10, for example, a conventional acoustic signal processing apparatus 100 has a left channel (hereinafter, Lch) input terminal 101 and a right channel (hereinafter, Rch).
That. ) Input terminal 102 and adders 103 to 105
, A phase shift circuit 106, and Lch and Rch output terminals 107 and 108.
【０００３】前記Ｌｃｈ及びＲｃｈ入力端子１０１，１
０２より入力された音響信号は、まず前記加算器１０３
に入力され互いに加算される。この加算器１０３の出力
信号は前記位相シフト回路１０６に入力され位相が所定
の角度だけシフトされた後、前記加算器１０４でＬｃｈ
音響信号と加算され、且つ、前記加算器１０５でＲｃｈ
音響信号と減算される。そして、前記加算器１０４の出
力が前記Ｌｃｈ出力端子１０７から取り出され、前記加
算器１０５の出力が前記Ｒｃｈ出力端子１０８から取り
出される。The Lch and Rch input terminals 101, 1
02 from the adder 103
And are added to each other. The output signal of the adder 103 is input to the phase shift circuit 106 and the phase is shifted by a predetermined angle.
The sound signal is added to the sound signal.
It is subtracted from the sound signal. Then, the output of the adder 104 is taken out from the Lch output terminal 107, and the output of the adder 105 is taken out from the Rch output terminal.
【０００４】このようにＬｃｈ及びＲｃｈの信号を加算
したものを位相シフトし、この位相シフトした信号を前
記Ｌｃｈの信号と加算し、且つ、前記Ｒｃｈと減算する
ことにより、最終的に図示しないスピーカより聴感上音
場が拡大された音声が再生される。As described above, the sum of the Lch and Rch signals is phase-shifted, and the phase-shifted signal is added to the Lch signal and subtracted from the Rch signal to finally provide a speaker (not shown). A sound whose sound field is enlarged in a more audible sense is reproduced.
【０００５】この従来の処理装置１００の出力信号の周
波数特性図を図１１に示す。即ち、Ｌｃｈ及びＲｃｈの
出力信号は位相が互いにシフトし、略くし形の波形にな
る。この特性は、疑似ステレオの一般的な特性である。FIG. 11 shows a frequency characteristic diagram of an output signal of the conventional processing device 100. That is, the output signals of the Lch and the Rch are shifted in phase from each other, and have a substantially comb-shaped waveform. This characteristic is a general characteristic of pseudo stereo.
【０００６】[0006]
【考案が解決しようとする課題】ところが、この装置１
００では入力される音響信号に含まれる人の声（以下、
人声という。）の成分とこの人声成分を除いた残信号と
を同一の前記位相シフト回路１０６で処理していたの
で、人声周波数帯域ｖにおいてＬｃｈ及びＲｃｈ信号の
波形にピークやディップが発生し、人声が不自然に聞こ
えたり、特に遅延素子を用いた音場拡大回路等では声が
二重に聞こえて聞き取りにくくなる等の課題があった。[Problem to be solved by the invention] However, this device 1
In the case of 00, a human voice included in the input acoustic signal (hereinafter, referred to as
It is called human voice. ) And the residual signal excluding this human voice component have been processed by the same phase shift circuit 106, so that peaks and dips occur in the waveforms of the Lch and Rch signals in the human voice frequency band v, There are problems that the voice sounds unnatural, and particularly in a sound field expansion circuit or the like using a delay element, the voice is heard twice and it becomes difficult to hear.
【０００７】又、テレビジョンでの野球の実況中継等で
は、観客等の周囲の音声はステレオ信号で、アナウンサ
の人声のみモノラル信号で送信される場合がある。この
ような場合は、応援等の雰囲気を出す周囲の音声情報は
十分音場拡大処理（例えば、所謂サラウンド処理）して
再生するのが好ましいが、アナウンサの人声ははっきり
と聴き取れる方が好ましい。従って、人声信号は音場拡
大処理しない方が聴き取り易かった。しかし、従来はこ
のような場合でも人声は周囲の音声とともに一様に音場
拡大処理されるため人声が聴き取り難くなるという欠点
があった。In a live broadcast of a baseball game on a television, the surrounding sound of the spectator may be transmitted as a stereo signal, and only the human voice of an announcer may be transmitted as a monaural signal. In such a case, it is preferable that the surrounding audio information that gives an atmosphere of support or the like be reproduced sufficiently after sound field expansion processing (for example, so-called surround processing), but it is preferable that the human voice of the announcer be clearly heard. . Therefore, it was easier to hear the human voice signal without the sound field expansion processing. However, conventionally, even in such a case, there is a disadvantage that the human voice is difficult to be heard because the human voice is uniformly subjected to the sound field expansion processing together with the surrounding voice.
【０００８】そこで本考案の目的は、人声の明瞭度を殆
ど落とさずに音場拡大の効果を得ることができる音響信
号処理装置を提供することにある。It is an object of the present invention to provide an acoustic signal processing apparatus capable of obtaining an effect of expanding a sound field without substantially reducing the clarity of a human voice.
【０００９】[0009]
【課題を解決するための手段】前記課題を解決するため
に本考案は、複数の音響信号から人声周波数帯域信号を
抽出する人声抽出手段と、前記人声周波数帯域信号レベ
ルを所定レベルと比較する信号比較手段と、この信号比
較手段の比較結果に基づいて開閉するスイッチ手段と、
前記音響信号を音場拡大処理する音場拡大処理手段と、
音場拡大された音響信号と前記スイッチ手段を介して入
力された前記人声周波数帯域信号とを加算する信号加算
手段とを備え、前記人声周波数帯域信号のレベルが所定
レベルを超えた場合は前記スイッチ手段を閉とし前記人
声周波数帯域信号を前記信号加算手段に入力させ、前記
人声周波数帯域信号のレベルが所定レベル以下の場合は
前記スイッチ手段を開とし前記人声周波数帯域信号を前
記信号加算手段に入力させないことを特徴とする。Means for Solving the Problems] To solve the above problems
The present invention provides a human voice extracting means for extracting a human voice frequency band signal from a plurality of audio signals, a signal comparing means for comparing the human voice frequency band signal level with a predetermined level, and a comparison result of the signal comparing means. Switch means for opening and closing based on
Sound field expansion processing means for performing sound field expansion processing on the acoustic signal,
Signal adding means for adding the sound field-expanded sound signal and the human voice frequency band signal input via the switch means, and when the level of the human voice frequency band signal exceeds a predetermined level, The switch means is closed and the human voice frequency band signal is input to the signal adding means.If the level of the human voice frequency band signal is equal to or lower than a predetermined level, the switch means is opened and the human voice frequency band signal is transmitted. It is characterized in that it is not input to the signal adding means.
【００１０】[0010]
【作用】音響信号はそのまま音場拡大処理される。一
方、音響信号から人声周波数帯域信号が抽出され、この
信号レベルが所定レベルと比較される。そして、信号レ
ベルが所定レベルを超える場合はスイッチ手段が閉とな
り、人声周波数帯域信号と音場拡大された音響信号とが
加算される。従って、この場合は音場拡大処理された音
響信号と音場拡大処理されない人声周波数帯域信号とが
同時に再生される。又、信号レベルが所定レベル以下の
場合はスイッチ手段が開となり、人声周波数帯域信号は
音場拡大された音響信号と加算されない。従って、この
場合は音場拡大処理された音響信号のみが再生される。[Action] acoustic signal is directly sound field expansion process. On the other hand, a human voice frequency band signal is extracted from the acoustic signal, and the signal level is compared with a predetermined level. When the signal level exceeds a predetermined level, the switch means is closed, and the human voice frequency band signal and the sound field expanded sound field are added. Therefore, in this case, the sound signal subjected to the sound field expansion processing and the human voice frequency band signal not subjected to the sound field expansion processing are simultaneously reproduced. When the signal level is equal to or lower than the predetermined level, the switch is opened, and the human voice frequency band signal is not added to the sound signal whose sound field is expanded. Therefore, in this case, only the sound signal subjected to the sound field expansion processing is reproduced.
【００１１】[0011]
【実施例】以下、本考案の実施例について添付図面を参
照しながら説明する。図１は本考案に係る音響信号処理
装置の第１実施例の構成図である。図１において音響信
号処理装置１は、Ｌｃｈ及びＲｃｈ音響信号Ｓ１，Ｓ２
を入力する人声抽出回路（人声抽出手段）２と、この抽
出回路２の出力信号のうち人声成分を除いたＬｃｈ及び
Ｒｃｈ残信号Ｓ１１，Ｓ１２を入力する音場拡大処理回
路（音場拡大処理手段）３と、この処理回路３のＬｃｈ
及びＲｃｈ出力信号Ｓ２１，Ｓ２２を入力する信号加算
回路（信号加算手段）４とにより構成され、更に前記人
声抽出回路２の出力信号のうち人声成分Ｓ３は前記信号
加算回路４に入力される。そして、前記信号加算回路４
の出力側よりＬｃｈ及びＲｃｈ出力信号Ｓ３１，Ｓ３２
が出力される。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a configuration diagram of a first embodiment of an audio signal processing device according to the present invention. In FIG. 1, the acoustic signal processing device 1 includes Lch and Rch acoustic signals S1 and S2.
And a sound field expansion processing circuit (sound field expansion circuit) for inputting the Lch and Rch residual signals S11 and S12 of the output signal of the extraction circuit 2 excluding the human voice component. Enlargement processing means) 3 and Lch of this processing circuit 3
And a signal adding circuit (signal adding means) 4 for inputting the Rch output signals S21 and S22, and a human voice component S3 of the output signal of the human voice extracting circuit 2 is input to the signal adding circuit 4. . And the signal addition circuit 4
From the output side of the Lch and Rch output signals S31 and S32
Is output.
【００１２】即ち、前記残成分Ｓ１１，Ｓ１２のみが音
場拡大処理回路３に入力され、音場拡大処理される。
尚、本実施例においては複数の音響信号としてＬｃｈ及
びＲｃｈ信号を用いたが、このＬｃｈ，Ｒｃｈに限定す
るものではなく、任意の２つの音響信号を用いることが
できることは言うまでもない。又、３つ以上の音響信号
を用いるよう構成してもよい。That is, only the residual components S11 and S12 are input to the sound field expansion processing circuit 3 and are subjected to sound field expansion processing.
In this embodiment, the Lch and Rch signals are used as the plurality of sound signals. However, the present invention is not limited to the Lch and Rch signals, and it goes without saying that any two sound signals can be used. Further, a configuration may be employed in which three or more acoustic signals are used.
【００１３】次に、この装置１を構成する各回路につい
て説明する。図２は第１実施例に係る人声抽出回路２の
構成図である。この抽出回路２はＬｃｈ及びＲｃｈの入
力側に夫々設けられた加算器２１，２２と、この加算器
２２の出力側に設けられたバンドパスフィルタ（以下、
ＢＰＦという。）２３及び加算器２４と、前記加算器２
１の出力側及び前記加算器２４の出力側に夫々設けられ
た加算器２５，２６とにより構成され、この加算器２
５，２６及び前記ＢＰＦ２３の出力側より出力信号Ｓ１
１，Ｓ１２及びＳ３が取り出される。Next, each circuit constituting the device 1 will be described. FIG. 2 is a configuration diagram of the human voice extraction circuit 2 according to the first embodiment. The extraction circuit 2 includes adders 21 and 22 provided on the input sides of Lch and Rch, respectively, and a band-pass filter (hereinafter, referred to as an output) of the adder 22.
It is called BPF. ) 23, an adder 24, and the adder 2
1 and an adder 25 provided on the output side of the adder 24, respectively.
5, 26 and the output signal S1 from the output side of the BPF 23.
1, S12 and S3 are taken out.
【００１４】尚、前記ＢＰＦ２３として人声帯域を主に
通過させるフィルタ、本実施例では通過帯域１５０Ｈｚ
乃至１ＫＨｚの特性のものを用いたが、この特性に限定
されるものではなく、人声帯域を主に通過させるフィル
タであれば他のフィルタを用いてもよい。The BPF 23 is a filter mainly for passing a human voice band, in this embodiment, a pass band of 150 Hz.
Although a filter having a characteristic of 1 kHz to 1 KHz is used, the present invention is not limited to this characteristic, and another filter may be used as long as the filter mainly passes the human voice band.
【００１５】即ち、Ｌｃｈ及びＲｃｈの音響信号は前記
加算器２２で加算され、この加算出力が前記ＢＰＦ２３
で人声周波数帯域信号Ｓ３のみ抽出され、この信号Ｓ３
は前記加算器２４に入力され、前記加算器２２の出力信
号と減算される。従って、この加算器２４の出力信号と
して人声帯域を除いた残信号が得られる。この残信号は
更に加算器２５，２６にも入力され、加算器２５では前
記加算器２１の出力信号と加算され、加算器２６では前
記加算器２１の出力信号と減算される。その結果、加算
器２５，２６の出力信号として夫々Ｌｃｈ，Ｒｃｈ残信
号Ｓ１１，Ｓ１２が得られる。That is, the Lch and Rch sound signals are added by the adder 22 and the added output is added to the BPF 23
Only the human voice frequency band signal S3 is extracted, and this signal S3
Is input to the adder 24, and is subtracted from the output signal of the adder 22. Therefore, a residual signal excluding the human voice band is obtained as an output signal of the adder 24. The residual signal is further input to adders 25 and 26, where the adder 25 adds the output signal of the adder 21 and the adder 26 subtracts the output signal of the adder 21. As a result, Lch and Rch residual signals S11 and S12 are obtained as output signals of the adders 25 and 26, respectively.
【００１６】図３は第１実施例に係る音場拡大処理回路
の構成図である。音場拡大処理回路３は、Ｌｃｈ及びＲ
ｃｈの残信号Ｓ１１，Ｓ１２を加算する加算器３１と、
この加算器３１の出力信号を入力する４つの遅延回路３
２乃至３５と、この遅延回路３２及び３３の出力信号を
加算する加算器３６と、この遅延回路３４及び３５の出
力信号を加算する加算器３７と、前記加算器３６の出力
信号と前記残信号Ｓ１１とを加算する加算器３８と、前
記加算器３７の出力信号と前記残信号Ｓ１２とを加算す
る加算器３９とにより構成され、この加算器３８，３９
の出力側より出力信号Ｓ２１，Ｓ２２が取り出される。
即ち、人声帯域成分を殆ど含まない前記残信号Ｓ１１，
Ｓ１２の２つの信号を加算、遅延して音場拡大処理した
ので、人声帯域成分には殆ど音場拡大処理の影響を与え
ない。FIG. 3 is a configuration diagram of the sound field expansion processing circuit according to the first embodiment. The sound field expansion processing circuit 3 includes Lch and R
an adder 31 for adding the remaining signals S11 and S12 of the channel;
Four delay circuits 3 for inputting the output signal of the adder 31
2 to 35, an adder 36 for adding the output signals of the delay circuits 32 and 33, an adder 37 for adding the output signals of the delay circuits 34 and 35, the output signal of the adder 36 and the residual signal An adder 38 for adding S11 and an adder 39 for adding the output signal of the adder 37 and the residual signal S12 are provided.
Output signals S21 and S22 are taken out from the output side of.
That is, the residual signals S11,
Since the sound field expansion processing is performed by adding and delaying the two signals in S12, the sound field expansion processing hardly affects the human voice band components.
【００１７】図４は第１実施例に係る信号加算回路の構
成図である。信号加算回路４は、Ｌｃｈ及びＲｃｈ用加
算回路４１，４２で構成される。即ち、音場拡大された
前記残信号Ｓ２１及びＳ２２は夫々加算器４１，４２で
前記人声信号Ｓ３と加算され、この加算器４１，４２の
出力信号として人声帯域成分が殆ど損われることなく音
場拡大されたＬｃｈ及びＲｃｈ音響信号Ｓ３１，Ｓ３２
が得られる。FIG. 4 is a configuration diagram of the signal addition circuit according to the first embodiment. The signal addition circuit 4 includes Lch and Rch addition circuits 41 and 42. That is, the residual signals S21 and S22 having the sound field expanded are added to the human voice signal S3 by the adders 41 and 42, respectively, and the human voice band components are hardly lost as output signals of the adders 41 and 42. Lch and Rch sound signals S31 and S32 with the sound field expanded
Is obtained.
【００１８】図５は第１実施例に係る人声抽出回路の他
の一例の構成図である。人声抽出回路５はＬｃｈ及びＲ
ｃｈ用に夫々ＢＰＦ５１，５２を設け、この出力信号を
夫々加算器５３，５４で前記信号Ｓ１，Ｓ２と加算する
よう構成した。この構成により人声帯域成分及び残信号
をＬｃｈ，Ｒｃｈ夫々別々に信号Ｓ８，Ｓ９及びＳ１
１，Ｓ１２として取り出すことができる。FIG. 5 is a block diagram of another example of the human voice extracting circuit according to the first embodiment. The human voice extraction circuit 5 includes Lch and R
BPFs 51 and 52 are provided for the respective channels, and the output signals are added to the signals S1 and S2 by adders 53 and 54, respectively. With this configuration, the human voice band component and the residual signal are separated into signals S8, S9 and S1 respectively for Lch and Rch.
1, S12.
【００１９】以上説明したように、図６の出力信号の周
波数特性図に示すように、人声帯域部分ｖは殆ど位相の
変化がなく、その他の残成分のみ位相がシフトし、音場
拡大処理は主に残成分に対してのみ行われる。As described above, as shown in the frequency characteristic diagram of the output signal in FIG. 6, the phase of the human voice band portion v hardly changes, and the phase of only the remaining components is shifted. Is mainly performed only on the remaining components.
【００２０】従って、例えば原音響信号に含まれる人の
話し声の聞き取り易さを損うことなく、又は歌声の音質
等を損うことなく背景となる周囲の音、楽器音等による
音場拡大処理をすることが可能になる。Therefore, for example, a sound field expansion process using background sounds, musical instrument sounds, and the like without impairing the audibility of a human voice included in the original sound signal or losing the sound quality of a singing voice. It becomes possible to do.
【００２１】図７は本考案に係る音響信号処理装置の第
２実施例の構成図である。図７において音響信号処理装
置６０は、Ｌｃｈ及びＲｃｈ音響信号Ｓ１，Ｓ２を入力
する人声抽出回路（人声抽出手段）６１と、抽出した人
声周波数帯域信号を整流するダイオードＤ１と、このダ
イオードＤ１の出力レベルを所定レベルと比較する信号
比較回路（信号比較手段）６２と、この比較回路６２の
比較結果に基づいて開閉するリレー（スイッチ手段）６
３と、前記音響信号Ｓ１，Ｓ２を音場拡大処理する音場
拡大処理回路（音場拡大処理手段）６４と、音場拡大さ
れた音響信号Ｓ７１，Ｓ７２と前記リレー６３を介して
入力された前記人声周波数帯域信号Ｓ７３とを加算する
信号加算回路（信号加算手段）６５とを備え、この加算
回路６５の出力信号としてＬｃｈ及びＲｃｈ出力信号Ｓ
８１，Ｓ８２が出力される。FIG . 7 is a block diagram of a second embodiment of the acoustic signal processing apparatus according to the present invention. In FIG. 7, an audio signal processing device 60 includes a human voice extraction circuit (human voice extraction means) 61 for inputting Lch and Rch audio signals S1 and S2, a diode D1 for rectifying the extracted human voice frequency band signal, and this diode A signal comparison circuit (signal comparison means) 62 for comparing the output level of D1 with a predetermined level, and a relay (switch means) 6 which opens and closes based on the comparison result of the comparison circuit 62
3, a sound field expansion processing circuit (sound field expansion processing means) 64 for performing sound field expansion processing on the sound signals S1 and S2, and the sound field expanded sound signals S71 and S72 and the input through the relay 63. A signal addition circuit (signal addition means) 65 for adding the human voice frequency band signal S73 to the Lch and Rch output signals S
81 and S82 are output.
【００２２】次に、この装置６０を構成する各回路につ
いて説明する。尚、前記音場拡大処理装置６４、信号加
算回路６５は第１実施例と同様の構成につき図示及び説
明を省略する。図８は第２実施例についての人声抽出回
路の構成図である。この抽出回路６１はＬｃｈ及びＲｃ
ｈ音響信号Ｓ１，Ｓ２を加算する加算器６６と、この加
算器６６の出力側に設けられたＢＰＦ６７とにより構成
され、このＢＰＦ６７の出力側より人声周波数帯域信号
Ｓ７３が出力される。Next, each circuit constituting the device 60 will be described. The illustration and description of the sound field expansion processing device 64 and the signal addition circuit 65 are omitted because they are the same as those in the first embodiment. FIG. 8 is a configuration diagram of a human voice extraction circuit according to the second embodiment. This extraction circuit 61 includes Lch and Rc
The adder 66 adds the h acoustic signals S1 and S2, and a BPF 67 provided on the output side of the adder 66. The human voice frequency band signal S73 is output from the output side of the BPF 67.
【００２３】ところで、野球の実況中継等の場合のよう
にステレオ信号とモノラル信号とを合成した信号が送信
されている場合、この信号が前記加算器６６で加算処理
されると、加算処理後の出力レベルは一般にステレオ信
号のみの場合より高くなる。これはモノラル信号はＬｃ
ｈとＲｃｈの信号レベル及び位相が略等しいため、加算
されるとレベルが比較的高くなることによる。従って、
前記加算器６６の出力レベルの大きさから、この信号に
モノラル信号が含まれているか否かの判断を行うことが
可能となる。When a signal obtained by synthesizing a stereo signal and a monaural signal is transmitted, as in the case of a live broadcast of baseball, etc., when this signal is added by the adder 66, the signal after the addition is processed. The output level is generally higher than when only a stereo signal is used. This is monaural signal Lc
This is because the signal level and the phase of h and Rch are substantially equal, so that when added, the level becomes relatively high. Therefore,
From the magnitude of the output level of the adder 66, it is possible to determine whether or not this signal contains a monaural signal.
【００２４】前記ダイオードＤ１は抽出された人声周波
数帯域信号Ｓ７３を整流するためのもので、整流された
人声周波数帯域信号は前記信号比較回路６２に入力され
る。この比較回路６２は従来のコンパレータで構成でき
る。又、しきい値を適当に選べばゲート回路で構成する
ことも可能である。尚、所定レベル信号としてはモノラ
ル信号の判別ができるよう比較的高いレベルの電圧を予
め設定しておき所定レベル信号入力端子に印加してお
く。The diode D1 is for rectifying the extracted human voice frequency band signal S73. The rectified human voice frequency band signal is input to the signal comparison circuit 62. This comparison circuit 62 can be constituted by a conventional comparator. Further, if the threshold value is appropriately selected, it is also possible to constitute a gate circuit. As the predetermined level signal, a voltage of a relatively high level is set in advance so that a monaural signal can be determined, and is applied to a predetermined level signal input terminal.
【００２５】前記リレー６３は前記比較回路６２の出力
信号で開閉制御される。即ち、所定レベルを超える電圧
が前記比較回路６２に入力した場合は、この比較回路６
２から高レベル（Ｈ）信号が出力され前記リレー６３が
閉となる。従って、抽出された人声周波数帯域信号Ｓ７
３は前記信号加算回路６５に入力され、前記信号加算回
路６５の出力信号Ｓ８１，Ｓ８２として、例えば、音場
拡大処理され臨場感の高まった観客等の周囲の音声と音
場拡大処理されず明瞭度が高く、中央に定位したアナウ
ンサの音声が同時に得られる。The opening and closing of the relay 63 is controlled by the output signal of the comparison circuit 62. That is, when a voltage exceeding a predetermined level is input to the comparison circuit 62, the comparison circuit 6
2 outputs a high level (H) signal, and the relay 63 is closed. Therefore, the extracted human voice frequency band signal S7
3 is input to the signal addition circuit 65, and as the output signals S81 and S82 of the signal addition circuit 65, for example, the sound surrounding the audience and the like who has increased the sense of reality due to the sound field expansion processing and the sound field expansion processing are clear. The voice of the announcer with high degree and localized in the center can be obtained at the same time.
【００２６】一方、所定レベル以下の信号が前記比較回
路６２に入力した場合は、この比較回路６２から低レベ
ル（Ｌ）信号が出力され前記リレー６３は開となる。従
って、抽出された人声周波数帯域信号Ｓ７３は前記信号
加算回路６５に入力されず、前記音場拡大処理回路６４
の出力信号Ｓ７１，Ｓ７２のみが前記信号加算回路６５
の出力信号Ｓ８１，Ｓ８２として得られる。例えば、観
客等の周囲の音声とアナウンサの音声の両方が音場拡大
処理されて前記信号加算回路６５から出力される。On the other hand, when a signal of a predetermined level or less is input to the comparison circuit 62, a low level (L) signal is output from the comparison circuit 62 and the relay 63 is opened. Therefore, the extracted human voice frequency band signal S73 is not input to the signal addition circuit 65, and the sound field expansion processing circuit 64
Only the output signals S71 and S72 of the
As output signals S81 and S82. For example, both the surrounding sound of the audience and the sound of the announcer are subjected to sound field expansion processing and output from the signal adding circuit 65.
【００２７】以上説明したように、人声周波数帯域信号
のレベルが比較的高い（例えばモノラル信号）場合には
この信号を音場拡大処理しないで出力するよう構成した
ので、図９の周波数特性図に示すようにステレオ信号に
よる観客等の周囲の音声は十分音場拡大処理して臨場感
を向上させ、モノラル信号によるアナウンサの人声（図
中のｖ）は明瞭度を向上させ、中央に定位させることが
できる。即ち、この装置６０は、アナウンサの音声がス
テレオ信号の場合は音場拡大処理し、モノラル信号の場
合は音場拡大処理しないよう構成した点に特徴がある。
例えば、野球の実況中継等のようにステレオ音声とモノ
ラル音声が合成された番組を観賞する際に特に効果を発
揮する。As described above, when the level of the human voice frequency band signal is relatively high (for example, a monaural signal), this signal is output without performing sound field expansion processing. As shown in the figure, the surrounding sound of the audience etc. by the stereo signal is sufficiently expanded in the sound field to improve the sense of reality, and the human voice of the announcer (v in the figure) by the monaural signal is improved in clarity and localized in the center. Can be done. That is, the device 60 is characterized in that the sound field expansion processing is performed when the sound of the announcer is a stereo signal, and the sound field expansion processing is not performed when the sound of the announcer is a monaural signal.
For example, this is particularly effective when watching a program in which stereo sound and monaural sound are synthesized, such as a live broadcast of baseball.
【００２８】又、モノラル音声が含まれるか否かに拘ら
ず元の音響信号を音場拡大処理する機能も併せ備えるた
め、人声信号を除いた残信号を音場拡大処理する場合に
比べ音場拡大効果の向上が図れるという効果もある。Also, since a function of expanding the sound field of the original audio signal regardless of whether or not monaural sound is included is also provided, the sound signal is expanded compared to the case where the remaining signal excluding the human voice signal is expanded. There is also an effect that the field expansion effect can be improved.
【００２９】[0029]
【考案の効果】本考案は、複数の人声周波数帯域信号の
レベルに基づいてこの信号を音場拡大処理するか否かを
判定するよう構成したので、例えばこの信号がモノラル
信号の場合には音場拡大処理しないよう構成することが
可能となる。従って、ステレオ信号とモノラル信号が合
成された信号の場合、この合成信号を音場拡大処理して
臨場感を高めると共に、モノラル信号は音場拡大処理し
ないで再生することができるため明瞭度を高め、中央に
定位させることが可能となる。 According to the present invention , a decision is made as to whether or not the sound field expansion processing should be performed on the basis of the levels of a plurality of human voice frequency band signals. For example, when this signal is a monaural signal, It is possible to configure so as not to perform the sound field expansion processing. Therefore, in the case of a signal in which a stereo signal and a monaural signal are combined, the synthesized signal is subjected to sound field expansion processing to enhance the sense of reality, and the monaural signal can be reproduced without the sound field expansion processing, so that clarity is increased. , Can be localized at the center.
【図１】本考案に係る音響信号処理装置の第１実施例の
構成図である。FIG. 1 is a configuration diagram of a first embodiment of an audio signal processing device according to the present invention.
【図２】第１実施例に係る人声抽出回路２の構成図であ
る。FIG. 2 is a configuration diagram of a human voice extraction circuit 2 according to the first embodiment.
【図３】第１実施例に係る音場拡大処理回路の構成図で
ある。FIG. 3 is a configuration diagram of a sound field expansion processing circuit according to the first embodiment.
【図４】第１実施例に係る信号加算回路の構成図であ
る。FIG. 4 is a configuration diagram of a signal addition circuit according to the first embodiment.
【図５】第１実施例に係る人声抽出回路の他の一例の構
成図である。FIG. 5 is a configuration diagram of another example of the human voice extraction circuit according to the first embodiment.
【図６】第１実施例の出力信号の周波数特性図である。FIG. 6 is a frequency characteristic diagram of an output signal of the first embodiment.
【図７】本考案に係る音響信号処理装置の第２実施例の
構成図である。FIG. 7 is a configuration diagram of a second embodiment of the audio signal processing device according to the present invention.
【図８】第２実施例についての人声抽出回路の構成図で
ある。FIG. 8 is a configuration diagram of a human voice extraction circuit according to a second embodiment.
【図９】第２実施例の出力信号の周波数特性図である。FIG. 9 is a frequency characteristic diagram of an output signal of the second embodiment.
【図１０】従来の音響信号処理装置の構成図である。FIG. 10 is a configuration diagram of a conventional acoustic signal processing device.
【図１１】従来の音響信号処理装置の出力信号の周波数
特性図である。FIG. 11 is a frequency characteristic diagram of an output signal of a conventional acoustic signal processing device.
１，６０・・・音響信号処理装置、２，６１・・・人声抽出回
路（人声抽出手段）、３，６４・・・音場拡大処理回路
（音場拡大処理手段）、４，６５・・・信号加算回路（信
号加算手段）、２１，２２，２４〜２６，３１，３６〜
３９，４１，４２，５３，５４・・・加算器、２３，５
１，５２・・・バンドパスフィルタ（ＢＰＦ）、３２〜３
５・・・遅延回路、６２・・・信号比較回路（信号比較手
段）、６３・・・リレー（スイッチ手段）、Ｄ１・・・ダイオ
ード。1, 60: sound signal processing device, 2, 61: human voice extraction circuit (human voice extraction means), 3, 64: sound field expansion processing circuit (sound field expansion processing means), 4, 65 ... Signal addition circuits (signal addition means) 21, 22, 24 to 26, 31, 36 to
39, 41, 42, 53, 54 ... adders, 23, 5
1, 52 ... bandpass filter (BPF), 32 to 3
5 delay circuit, 62 signal comparison circuit (signal comparison means), 63 relay (switch means), D1 diode.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭49−59605（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) H04S 1/00 H04S 7/00────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-49-59605 (JP, A) (58) Fields investigated (Int. Cl. 6 , DB name) H04S 1/00 H04S 7/00
Claims (1)
抽出する人声抽出手段と、この人声周波数帯域信号レベ
ルを所定レベルと比較する信号比較手段と、この信号比
較手段の比較結果に基づいて開閉するスイッチ手段と、
前記音響信号を音場拡大処理する音場拡大処理手段と、
音場拡大された音響信号と前記スイッチ手段を介して入
力された前記人声周波数帯域信号とを加算する信号加算
手段とを備え、前記人声周波数帯域信号のレベルが所定
レベルを超えた場合は前記スイッチ手段を閉とし前記人
声周波数帯域信号を前記信号加算手段に入力させ、前記
人声周波数帯域信号のレベルが所定レベル以下の場合は
前記スイッチ手段を開とし前記人声周波数帯域信号を前
記信号加算手段に入力させないことを特徴とする音響信
号処理装置。A human voice extracting means for extracting a human voice frequency band signal from a plurality of acoustic signals, a signal comparing means for comparing the human voice frequency band signal level with a predetermined level, and a comparison result of the signal comparing means. Switch means for opening and closing based on
Sound field expansion processing means for performing sound field expansion processing on the acoustic signal,
Signal adding means for adding the sound field-expanded sound signal and the human voice frequency band signal input via the switch means, and when the level of the human voice frequency band signal exceeds a predetermined level, The switch means is closed and the human voice frequency band signal is input to the signal adding means.If the level of the human voice frequency band signal is equal to or lower than a predetermined level, the switch means is opened and the human voice frequency band signal is transmitted. An acoustic signal processing device wherein the signal is not input to a signal adding means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1992073586U JP2591472Y2 (en) | 1991-11-11 | 1992-09-29 | Sound signal processing device |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3-100664 | 1991-11-11 | ||
| JP10066491 | 1991-11-11 | ||
| JP1992073586U JP2591472Y2 (en) | 1991-11-11 | 1992-09-29 | Sound signal processing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0560096U JPH0560096U (en) | 1993-08-06 |
| JP2591472Y2 true JP2591472Y2 (en) | 1999-03-03 |
Family
ID=26414727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1992073586U Expired - Lifetime JP2591472Y2 (en) | 1991-11-11 | 1992-09-29 | Sound signal processing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2591472Y2 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001069597A (en) * | 1999-06-22 | 2001-03-16 | Yamaha Corp | Voice-processing method and device |
| JP4602204B2 (en) * | 2005-08-31 | 2010-12-22 | ソニー株式会社 | Audio signal processing apparatus and audio signal processing method |
| JP4637725B2 (en) | 2005-11-11 | 2011-02-23 | ソニー株式会社 | Audio signal processing apparatus, audio signal processing method, and program |
| JP4894386B2 (en) | 2006-07-21 | 2012-03-14 | ソニー株式会社 | Audio signal processing apparatus, audio signal processing method, and audio signal processing program |
| JP4835298B2 (en) | 2006-07-21 | 2011-12-14 | ソニー株式会社 | Audio signal processing apparatus, audio signal processing method and program |
| US20090060208A1 (en) * | 2007-08-27 | 2009-03-05 | Pan Davis Y | Manipulating Spatial Processing in a Audio System |
| JP5587706B2 (en) * | 2010-09-13 | 2014-09-10 | クラリオン株式会社 | Sound processor |
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1992
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