JP2007267071A - Telephone device - Google Patents

Telephone device Download PDF

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JP2007267071A
JP2007267071A JP2006089844A JP2006089844A JP2007267071A JP 2007267071 A JP2007267071 A JP 2007267071A JP 2006089844 A JP2006089844 A JP 2006089844A JP 2006089844 A JP2006089844 A JP 2006089844A JP 2007267071 A JP2007267071 A JP 2007267071A
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signal
voice signal
received voice
distance
microphone
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Yoshiomi Kusunoki
喜臣 楠
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Sanyo Electric Co Ltd
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Sanyo Electric Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To materialize a comfortable telephone call by improving speech quality. <P>SOLUTION: A transmission audio signal is taken in by a microphone 22. A reception audio signal is created by a signal processing circuit 16, an AD/DA conversion circuit 18, and an amplifier 24; and is outputted by a speaker 26. A phase inversion circuit 28 and an amplifier 30 create the inverse phase signal where the phase is reversed to a reception audio signal, and also the gain is controlled. The created inverse phase signal is outputted by the speaker 32. Here, an opening which leads to the speaker 26 and an opening which leads to the speaker 32 are arranged respectively while being separated by a first distance and a second distance from the opening which leads to the microphone 22. However, the second distance is shorter than the first distance. As a result, at the time of reaching the microphone 22, the reception audio signal and the inverse phase signal have almost the same gain. The reception audio signal which leaks into the microphone 22 is offset by the inverse phase signal. <P>COPYRIGHT: (C)2008,JPO&amp;INPIT

Description

この発明は、電話機に関し、特にたとえば、受話音声をスピーカから出力し、送話音声をマイクロフォンによって取り込む、電話機に関する。   The present invention relates to a telephone set, and more particularly to a telephone set that outputs a received voice from a speaker and captures a transmitted voice using a microphone.

従来のこの種の装置の一例が、特許文献１に開示されている。この従来技術によれば、受話拡声を行う場合、ミュート処理部は、拡声された受話音声の出力期間に、マイクから取り込まれた送話音声の出力を停止する。これによって、拡声された受話音声が送話音声に漏れ込むことに起因するハウリングが防止され、通話品質が向上する。
特開２００３−１８０７８号公報［H04B 7/26, H04M 1/60, H04Q 7/32］ An example of a conventional device of this type is disclosed in Patent Document 1. According to this prior art, when performing reception voice enhancement, the mute processing unit stops outputting the transmission voice captured from the microphone during the output period of the voiced reception voice. As a result, howling due to the leaked received voice leaking into the transmitted voice is prevented, and the call quality is improved.
JP 2003-18078 A [H04B 7/26, H04M 1/60, H04Q 7/32]

しかし、従来技術では、受話音声および送話音声を同時に処理できないため、快適に通話を行うことができない。     However, in the prior art, since the received voice and the transmitted voice cannot be processed at the same time, it is not possible to make a comfortable call.

それゆえに、この発明の主たる目的は、通話品質を改善でき、かつ快適な通話を実現できる、電話機を提供することである。     Therefore, a main object of the present invention is to provide a telephone that can improve call quality and realize a comfortable call.

請求項１の発明に従う電話機(10)は、送話音声信号を取り込む取り込み手段(22, OP1)、受話音声信号を作成する第１作成手段(16, 18, 24)、取り込み手段から第１距離を隔てて配置され、第１作成手段によって作成された受話音声信号を出力する第１出力手段(26, OP3)、第１作成手段によって作成された受話音声信号に対して位相が反転されかつゲインが抑制された逆位相信号を作成する第２作成手段(28, 30)、および取り込み手段から第１距離よりも短い第２距離を隔てて配置され、第２作成手段によって作成された逆位相信号を出力する第２出力手段(32, OP2)を備える。   The telephone (10) according to the invention of claim 1 includes a capturing means (22, OP1) for capturing a transmitted voice signal, a first creating means (16, 18, 24) for generating a received voice signal, and a first distance from the capturing means. And a first output means (26, OP3) for outputting the received voice signal created by the first creating means, the phase of which is inverted with respect to the received voice signal created by the first creating means and gain The second generation means (28, 30) for generating the anti-phase signal in which the signal is suppressed, and the anti-phase signal generated by the second preparation means arranged at a second distance shorter than the first distance from the capturing means Is provided with second output means (32, OP2).

送話音声信号は、取り込み手段によって取り込まれる。受話音声信号は、第１作成手段によって作成され、第１出力手段によって出力される。第２作成手段は、受話音声信号に対して位相が反転されかつゲインが抑制された逆位相信号を作成する。作成された逆位相信号は、第２出力手段によって出力される。ここで、第１出力手段および第２出力手段はそれぞれ、取り込み手段から第１距離および第２距離を隔てて配置される。ただし、第２距離は、第１距離よりも短い。   The transmitted voice signal is captured by the capturing means. The received voice signal is created by the first creating means and outputted by the first output means. The second creating means creates an antiphase signal whose phase is inverted and the gain is suppressed with respect to the received voice signal. The created antiphase signal is output by the second output means. Here, the first output means and the second output means are respectively disposed at a first distance and a second distance from the capturing means. However, the second distance is shorter than the first distance.

このように、逆位相信号のゲインは、受話音声信号のゲインよりも小さい。また、逆位相信号を出力する第２出力手段から取り込み手段までの距離は、受話音声信号を出力する第１出力手段から取り込み手段までの距離よりも短い。この結果、取り込み手段に到達した時点では、受話音声信号および逆位相信号はほぼ同じゲインを有する。取り込み手段に漏れ込む受話音声信号は、逆位相信号によって相殺される。これによって、通話品質が改善される。また、取り込み手段，第１出力手段および第２出力手段は通話可能状態において継続的に起動するため、快適な通話が可能となる。   Thus, the gain of the antiphase signal is smaller than the gain of the received voice signal. Further, the distance from the second output means for outputting the antiphase signal to the capturing means is shorter than the distance from the first output means for outputting the received voice signal to the capturing means. As a result, the received voice signal and the antiphase signal have substantially the same gain when reaching the capturing means. The received voice signal that leaks into the capturing means is canceled by the antiphase signal. This improves the call quality. In addition, since the capturing unit, the first output unit, and the second output unit are continuously activated in a call-enabled state, a comfortable call is possible.

請求項２の発明に従う電話機は、請求項１に従属し、第２作成手段によって作成される逆位相信号のダイナミックレンジを第１作成手段によって作成される受話音声信号のダイナミックレンジよりも狭くするダイナミックレンジ抑制手段(40)をさらに備える。   The telephone according to the invention of claim 2 is dependent on claim 1 and is configured such that the dynamic range of the antiphase signal created by the second creation means is narrower than the dynamic range of the received voice signal created by the first creation means. Range suppression means (40) is further provided.

これによって、第１作成手段によって作成される受話音声信号のレベルが飽和したときは、第２作成手段によって作成される逆位相信号のレベルも飽和する。取り込み手段に到達した時点の受話音声信号および逆位相信号は、飽和現象が発生したときでも、位相が互いに反転した波形を有する。   As a result, when the level of the received voice signal created by the first creating means is saturated, the level of the antiphase signal created by the second creating means is also saturated. The received voice signal and the antiphase signal at the time of reaching the capturing means have waveforms whose phases are inverted from each other even when a saturation phenomenon occurs.

請求項３の発明に従う電話機は、請求項１または２に従属し、取り込み手段によって取り込まれた送話音声信号に含まれるノイズ成分を第１作成手段によって作成された受話音声信号に基づいて除去する除去手段(20)をさらに備える。これによって、通話品質がさらに改善される。   The telephone according to the invention of claim 3 is dependent on claim 1 or 2, and removes a noise component included in the transmitted voice signal captured by the capturing means based on the received voice signal generated by the first generating means. A removal means (20) is further provided. This further improves call quality.

請求項４の発明に従う電話機は、請求項１ないし３のいずれかに従属し、複数の面を有する筐体をさらに備え、取り込み手段に通じる第１開口部および第２出力手段に通じる第２開口部は筐体の同じ面に形成される。これによって、送話音声信号に含まれる受話音声成分が、逆位相信号によって的確に除去される。   A telephone according to the invention of claim 4 is dependent on any one of claims 1 to 3, further comprising a housing having a plurality of surfaces, and a first opening leading to the taking-in means and a second opening leading to the second output means. The parts are formed on the same surface of the housing. As a result, the received voice component included in the transmitted voice signal is accurately removed by the antiphase signal.

この発明によれば、逆位相信号のゲインは、受話音声信号のゲインよりも小さい。また、逆位相信号を出力する第２出力手段から取り込み手段までの距離は、受話音声信号を出力する第１出力手段から取り込み手段までの距離よりも短い。この結果、取り込み手段に到達した時点では、受話音声信号および逆位相信号はほぼ同じゲインを有する。取り込み手段に漏れ込む受話音声信号は、逆位相信号によって相殺される。これによって、通話品質が改善される。また、取り込み手段，第１出力手段および第２出力手段は通話可能状態において継続的に起動するため、快適な通話が可能となる。   According to this invention, the gain of the antiphase signal is smaller than the gain of the received voice signal. Further, the distance from the second output means for outputting the antiphase signal to the capturing means is shorter than the distance from the first output means for outputting the received voice signal to the capturing means. As a result, the received voice signal and the antiphase signal have substantially the same gain when reaching the capturing means. The received voice signal that leaks into the capturing means is canceled by the antiphase signal. This improves the call quality. In addition, since the capturing unit, the first output unit, and the second output unit are continuously activated in a call-enabled state, a comfortable call is possible.

この発明の上述の目的，その他の目的，特徴および利点は、図面を参照して行う以下の実施例の詳細な説明から一層明らかとなろう。   The above object, other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

図１を参照して、この実施例の携帯電話機１０は、キー入力装置３６を含む。キー入力装置３６によって発呼操作が行われると、ＣＰＵ３４は、通話相手の携帯電話機の電話番号をＬＣＤ３８に表示し、かつ信号処理回路１６および無線回路１４を制御して発呼信号を出力する。出力された発呼信号は、アンテナ１２を通して通話相手の携帯電話機に送信される。通話相手が着呼操作を行うと、通話可能状態となる。   Referring to FIG. 1, the mobile phone 10 of this embodiment includes a key input device 36. When a call operation is performed by the key input device 36, the CPU 34 displays the telephone number of the other party's mobile phone on the LCD 38 and controls the signal processing circuit 16 and the radio circuit 14 to output a call signal. The output calling signal is transmitted to the mobile phone of the other party through the antenna 12. When the other party performs an incoming call operation, it becomes possible to make a call.

通話可能状態に移行した後にキー入力装置３６によって通話終了操作が行われると、ＣＰＵ３６は、信号処理回路１６および無線回路１４を制御して、通話相手に通話終了信号を送信する。通話終了信号の送信後、ＣＰＵ３４は、通話処理を終了する。先に通話相手から通話終了信号を受信した場合も、ＣＰＵ３４は、通話処理を終了する。   When a call termination operation is performed by the key input device 36 after the transition to the call enabled state, the CPU 36 controls the signal processing circuit 16 and the radio circuit 14 to transmit a call termination signal to the other party. After transmitting the call end signal, the CPU 34 ends the call process. Also when the call end signal is received from the call partner first, the CPU 34 ends the call process.

通話可能状態では、次のような処理が実行される。通話相手から送られてきた変調音声信号（高周波信号）は、アンテナ１２によって捉えられる。捉えられた変調音声信号は、無線回路１４によって復調処理を施され、かつ信号処理回路１６によって復号処理を施される。信号処理回路１６によって復号された受話音声データは、ＡＤ／ＤＡ変換回路１８によってアナログ信号である受話音声信号に変換される。変換された受話音声信号は、アンプ２４によって増幅率α１（α１≧α２）に従う増幅処理を施され、その後にスピーカ２６から出力される。   In the call ready state, the following processing is executed. The modulated audio signal (high frequency signal) sent from the other party is captured by the antenna 12. The captured modulated audio signal is demodulated by the radio circuit 14 and decoded by the signal processing circuit 16. The reception voice data decoded by the signal processing circuit 16 is converted by the AD / DA conversion circuit 18 into a reception voice signal which is an analog signal. The converted received voice signal is subjected to amplification processing in accordance with the amplification factor α1 (α1 ≧ α2) by the amplifier 24, and then output from the speaker 26.

変換された受話音声信号はまた、位相反転回路２８に与えられる。受話音声信号の位相は、位相反転回路２８によって反転される。位相反転回路２８から出力された逆位相信号は、アンプ３０によって増幅率α２に従う増幅処理を施され、その後にスピーカ３２から出力される。   The converted received voice signal is also supplied to the phase inversion circuit 28. The phase of the received voice signal is inverted by the phase inversion circuit 28. The antiphase signal output from the phase inverting circuit 28 is subjected to amplification processing according to the amplification factor α2 by the amplifier 30, and then output from the speaker 32.

図２を参照して、スピーカ２６に通じる開口ＯＰ３は筐体４２の前面上方に設けられ、マイクロフォン２２に通じる開口ＯＰ１およびスピーカ３２に通じる開口ＯＰ２は筐体４２の前面下方に設けられる。つまり、開口ＯＰ１〜ＯＰ３（特に開口ＯＰ１およびＯＰ２）は、筐体４２を形成する複数の面のうち互いに同じ面に形成される。開口ＯＰ１から開口ＯＰ３までの距離を“Ｌ１”と定義し、開口ＯＰ１から開口ＯＰ２までの距離を“Ｌ２”と定義すると、距離Ｌ２は距離Ｌ１よりも短い。   Referring to FIG. 2, opening OP3 leading to speaker 26 is provided above the front surface of housing 42, and opening OP1 leading to microphone 22 and opening OP2 leading to speaker 32 are provided below the front surface of housing 42. That is, the openings OP <b> 1 to OP <b> 3 (particularly the openings OP <b> 1 and OP <b> 2) are formed on the same surface among a plurality of surfaces forming the housing 42. If the distance from the opening OP1 to the opening OP3 is defined as “L1” and the distance from the opening OP1 to the opening OP2 is defined as “L2”, the distance L2 is shorter than the distance L1.

この結果、スピーカ３２から出力された時点の逆位相信号のゲインはスピーカ２６から出力された時点の受話音声信号のゲインよりも小さいものの、マイクロフォン２２に到達した時点では、逆位相信号および受話音声信号はほぼ同じゲインを有する。このため、マイクロフォン２２に漏れ込む受話音声信号は、逆位相信号によって相殺される。   As a result, although the gain of the antiphase signal at the time of output from the speaker 32 is smaller than the gain of the received voice signal at the time of output from the speaker 26, the antiphase signal and the received voice signal are reached when reaching the microphone 22. Have approximately the same gain. For this reason, the received voice signal leaking into the microphone 22 is canceled by the antiphase signal.

電源回路４０は、アンプ３０に供給する駆動電圧をアンプ２４を含む他の回路に供給する駆動電圧よりも低い電圧に抑制する。このため、図３（Ｂ）〜図３（Ｃ）または図４（Ｂ）〜図４（Ｃ）に示すように、スピーカ３２から出力される逆位相信号のダイナミックレンジＤ２は、スピーカ２６から出力される受話音声信号のダイナミックレンジＤ１よりも狭くなる。   The power supply circuit 40 suppresses the drive voltage supplied to the amplifier 30 to a voltage lower than the drive voltage supplied to other circuits including the amplifier 24. Therefore, as shown in FIGS. 3B to 3C or FIGS. 4B to 4C, the dynamic range D2 of the antiphase signal output from the speaker 32 is output from the speaker 26. It becomes narrower than the dynamic range D1 of the received voice signal.

図３（Ａ）に示す受話音声信号がアンプ２４に与えられた場合、アンプ２４から出力される受話音声信号が飽和することはない（図３（Ｂ）参照）。しかし、図４（Ａ）に示す受話音声信号がアンプ２４に与えられると、アンプ２４から出力される受話音声信号が飽和してしまう（図４（Ｂ）参照）。このような飽和現象は、ハンズフリー通話モードのように受話音声を拡張して出力するモードで頻繁に発生する。   When the reception voice signal shown in FIG. 3A is supplied to the amplifier 24, the reception voice signal output from the amplifier 24 is not saturated (see FIG. 3B). However, when the received voice signal shown in FIG. 4A is supplied to the amplifier 24, the received voice signal output from the amplifier 24 is saturated (see FIG. 4B). Such a saturation phenomenon frequently occurs in a mode in which the received voice is expanded and output as in the hands-free call mode.

しかし、ダイナミックレンジＤ１およびＤ２が上述のような関係を有するため、受話音声信号が飽和しないときは逆位相信号も飽和せず（図３（Ｃ）参照）、受話音声信号が飽和すると逆位相信号も飽和する（図４（Ｃ）参照）。したがって、マイクロフォン２２に到達した時点の受話音声信号および逆位相信号は、飽和現象が発生したときでも、位相が互いに反転した波形を有する。マイクロフォン２２に漏れ込む受話音声信号は、逆位相信号によってほぼ正確に除去される。   However, since the dynamic ranges D1 and D2 have the above relationship, when the received voice signal is not saturated, the antiphase signal is not saturated (see FIG. 3C), and when the received voice signal is saturated, the antiphase signal is saturated. Is also saturated (see FIG. 4C). Therefore, the received voice signal and the antiphase signal at the time of reaching the microphone 22 have waveforms whose phases are inverted from each other even when the saturation phenomenon occurs. The received voice signal leaking into the microphone 22 is almost accurately removed by the antiphase signal.

マイクロフォン２２によって取り込まれた送話音声信号は、ノイズキャンセラ２０を形成する加算器２０ｃに与えられる。位相反転回路２０ａは、ＡＤ／ＤＡ変換回路１８から出力された受話音声信号の位相を反転させる。これによって得られた逆位相信号は、アンプ２０ｂによって増幅率α３に従う増幅処理を施された後、加算器２０ｃに与えられる。加算器２０ｃは、アンプ２０ｂから与えられた逆位相信号をマイクロフォン２２から与えられた送話音声信号に加算する。送話音声信号にわずかに残存する受話音声成分は、逆位相信号によって除去される。   The transmitted voice signal captured by the microphone 22 is supplied to an adder 20 c that forms the noise canceller 20. The phase inversion circuit 20 a inverts the phase of the received voice signal output from the AD / DA conversion circuit 18. The antiphase signal thus obtained is subjected to amplification processing in accordance with the amplification factor α3 by the amplifier 20b, and then given to the adder 20c. The adder 20c adds the antiphase signal given from the amplifier 20b to the transmission voice signal given from the microphone 22. The received speech component that remains slightly in the transmitted speech signal is removed by the antiphase signal.

加算器２０ｃから出力された送話音声信号は、ＡＤ／ＤＡ変換回路１８によってディジタル信号である送話音声データに変換される。変換された送話音声データは、信号処理回路１６によって符号化処理を施され、さらに無線回路１４によって変調処理を施される。無線回路１４によって生成された変調音声信号は、上述と同様、アンテナ１２を利用して通話相手に送信される。   The transmission voice signal output from the adder 20c is converted into transmission voice data which is a digital signal by the AD / DA conversion circuit 18. The converted transmission voice data is subjected to encoding processing by the signal processing circuit 16 and further subjected to modulation processing by the radio circuit 14. The modulated audio signal generated by the radio circuit 14 is transmitted to the other party using the antenna 12 as described above.

以上の説明から分かるように、送話音声信号は、マイクロフォン２２によって取り込まれる。受話音声信号は、信号処理回路１６，ＡＤ／ＤＡ変換回路１８およびアンプ２４によって作成され、スピーカ２６によって出力される。位相反転回路２８およびアンプ３０は、受話音声信号に対して位相が反転されかつゲインが抑制された逆位相信号を作成する。作成された逆位相信号は、スピーカ３２によって出力される。ここで、スピーカ２６に通じる開口ＯＰ３およびスピーカ３２に通じる開口ＯＰ２はそれぞれ、マイクロフォン２２に通じる開口ＯＰ１から距離Ｌ１およびＬ２を隔てて配置される。ただし、距離Ｌ２は、距離Ｌ１よりも短い。   As can be seen from the above description, the transmitted voice signal is captured by the microphone 22. The received voice signal is created by the signal processing circuit 16, the AD / DA conversion circuit 18 and the amplifier 24, and is output by the speaker 26. The phase inversion circuit 28 and the amplifier 30 create an antiphase signal in which the phase is inverted and the gain is suppressed with respect to the received voice signal. The created antiphase signal is output by the speaker 32. Here, the opening OP3 that communicates with the speaker 26 and the opening OP2 that communicates with the speaker 32 are arranged at distances L1 and L2 from the opening OP1 that communicates with the microphone 22, respectively. However, the distance L2 is shorter than the distance L1.

このように、逆位相信号のゲインは、受話音声信号のゲインよりも小さい。また、逆位相信号を出力するスピーカ３２用の開口ＯＰ２からマイクロフォン２２用の開口ＯＰ１までの距離Ｌ２は、受話音声信号を出力するスピーカ２６用の開口ＯＰ３からマイクロフォン２２用の開口ＯＰ３までの距離Ｌ１よりも短い。この結果、マイクロフォン２２に到達した時点では、受話音声信号および逆位相信号はほぼ同じゲインを有する。マイクロフォン２２に漏れ込む受話音声信号は、逆位相信号によって相殺される。これによって、通話品質が改善される。また、マイクロフォン３２およびスピーカ２６，３２は通話可能状態において継続的に起動するため、快適な通話が可能となる。   Thus, the gain of the antiphase signal is smaller than the gain of the received voice signal. The distance L2 from the opening OP2 for the speaker 32 that outputs an antiphase signal to the opening OP1 for the microphone 22 is the distance L1 from the opening OP3 for the speaker 26 that outputs the received voice signal to the opening OP3 for the microphone 22. Shorter than. As a result, when the microphone 22 is reached, the received voice signal and the antiphase signal have substantially the same gain. The received voice signal leaking into the microphone 22 is canceled by the antiphase signal. This improves the call quality. In addition, since the microphone 32 and the speakers 26 and 32 are continuously activated in a call-enabled state, a comfortable call can be made.

なお、この実施例では、携帯電話機を用いて説明しているが、この発明は据え置き型の電話機に適用してもよい。また、この実施例では、スピーカ３２を本体前面の下方に設けているが、上述のような距離Ｄ１およびＤ２の関係が成立する限り、本体前面の別の位置に設けるようにしてもよい。さらに、この実施例では、ストレート型（フラット型）の携帯電話機を用いて説明しているが、この発明は折りたたみ型の携帯電話機にも適用できる。   Although this embodiment has been described using a mobile phone, the present invention may be applied to a stationary phone. Further, in this embodiment, the speaker 32 is provided below the front surface of the main body, but may be provided at another position on the front surface of the main body as long as the relationship between the distances D1 and D2 as described above is established. Further, in this embodiment, a straight type (flat type) mobile phone is described, but the present invention can also be applied to a folding type mobile phone.

この発明の一実施例の構成を示すブロック図である。It is a block diagram which shows the structure of one Example of this invention. 図１実施例の外観の一例を示す図解図である。It is an illustration figure which shows an example of the external appearance of FIG. 1 Example. （Ａ）は増幅前の受話音声信号の一例を示す波形図であり、（Ｂ）は増幅後の受話音声信号の一例を示す波形図であり、そして（Ｃ）は逆位相信号の一例を示す波形図である。(A) is a waveform diagram showing an example of a received voice signal before amplification, (B) is a waveform diagram showing an example of a received voice signal after amplification, and (C) shows an example of an antiphase signal. It is a waveform diagram. （Ａ）は増幅前の受話音声信号の他の一例を示す波形図であり、（Ｂ）は増幅後の受話音声信号の他の一例を示す波形図であり、そして（Ｃ）は逆位相信号の他の一例を示す波形図である。(A) is a waveform diagram showing another example of the received voice signal before amplification, (B) is a waveform diagram showing another example of the received voice signal after amplification, and (C) is an antiphase signal. It is a wave form diagram which shows another example.

符号の説明Explanation of symbols

１０ …携帯電話機
１４ …無線回路
１６ …信号処理回路
２０ …ノイズキャンセラ
２０ｂ，２４，３０ …アンプ
２２ …マイクロフォン
２６，３２ …スピーカ
２８ …位相反転回路 DESCRIPTION OF SYMBOLS 10 ... Mobile phone 14 ... Radio circuit 16 ... Signal processing circuit 20 ... Noise canceller 20b, 24, 30 ... Amplifier 22 ... Microphone 26, 32 ... Speaker 28 ... Phase inversion circuit

Claims (4)

送話音声信号を取り込む取り込み手段、
受話音声信号を作成する第１作成手段、
前記取り込み手段から第１距離を隔てて配置され、前記第１作成手段によって作成された受話音声信号を出力する第１出力手段、
前記第１作成手段によって作成された受話音声信号に対して位相が反転されかつゲインが抑制された逆位相信号を作成する第２作成手段、および
前記取り込み手段から前記第１距離よりも短い第２距離を隔てて配置され、前記第２作成手段によって作成された逆位相信号を出力する第２出力手段を備える、電話機。 Capture means for capturing transmitted audio signals;
A first creation means for creating a received voice signal;
A first output means disposed at a first distance from the capturing means and outputting a received voice signal created by the first creating means;
A second creation means for creating a reverse phase signal whose phase is inverted and a gain is suppressed with respect to the reception voice signal created by the first creation means; and a second shorter than the first distance from the capture means. A telephone set comprising second output means arranged at a distance and outputting an antiphase signal created by the second creation means. 前記第２作成手段によって作成される逆位相信号のダイナミックレンジを前記第１作成手段によって作成される受話音声信号のダイナミックレンジよりも狭くするダイナミックレンジ抑制手段をさらに備える、請求項１記載の電話機。   The telephone set according to claim 1, further comprising dynamic range suppression means for narrowing a dynamic range of the antiphase signal created by the second creation means to be smaller than a dynamic range of the received voice signal created by the first creation means. 前記取り込み手段によって取り込まれた送話音声信号に含まれるノイズ成分を前記第１作成手段によって作成された受話音声信号に基づいて除去する除去手段をさらに備える、請求項１または２記載の電話機。   The telephone set according to claim 1, further comprising a removing unit that removes a noise component included in the transmitted voice signal captured by the capturing unit based on the received voice signal created by the first creating unit. 複数の面を有する筐体をさらに備え、
前記取り込み手段に通じる第１開口部および前記第２出力手段に通じる第２開口部を前記筐体の同じ面に形成するようにした、請求項１ないし３のいずれかに記載の電話機。 A housing having a plurality of surfaces;
The telephone set according to any one of claims 1 to 3, wherein a first opening leading to the capturing means and a second opening leading to the second output means are formed on the same surface of the casing.
JP2006089844A 2006-03-29 2006-03-29 Telephone device Withdrawn JP2007267071A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6368843B1 (en) * 2017-11-17 2018-08-01 チエル株式会社 Data communication reproduction device, data communication reproduction method, and data communication reproduction program

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6368843B1 (en) * 2017-11-17 2018-08-01 チエル株式会社 Data communication reproduction device, data communication reproduction method, and data communication reproduction program

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