JP2007019898A - Portable telephone - Google Patents

Portable telephone Download PDF

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JP2007019898A
JP2007019898A JP2005199580A JP2005199580A JP2007019898A JP 2007019898 A JP2007019898 A JP 2007019898A JP 2005199580 A JP2005199580 A JP 2005199580A JP 2005199580 A JP2005199580 A JP 2005199580A JP 2007019898 A JP2007019898 A JP 2007019898A
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bone conduction
filter
conduction sound
sound
speaker
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Masashi Ishikawa
雅士 石川
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Toshiba Corp
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Toshiba Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a portable telephone in which a listen-in suitable to surroundings is possible only by utilizing a bone conduction speaker by means of practicing a switch between a receiver operating by bone conduction sounds and that operating by air conduction sounds. <P>SOLUTION: If a volume value of a volume key 6 is higher than a threshold, a controller 10 determines that ambient noises are high, and then selects a bone conduction filter coefficient to set the coefficient in an audio filter 3. Consequently, received audio signals are fed to the bone conduction speaker 7 with a nearly flat frequency characteristic unchanged, so that the bone conduction speaker 7 outputs the signals to a user as those of the bone conduction sounds whose original high-frequency range has been enhanced. If the volume value of the volume key 6 is lower than the threshold, the controller 10 determines that the ambient noises are low, and then selects an air conduction filter coefficient to set the coefficient in the audio filter 3. Consequently, received audio signals are fed to the bone conduction speaker 7 with a high-frequency range reduced, so that the bone conduction speaker 7 outputs the signals to a user as those of air conduction sounds whose high-frequency noisy "shaka-shaka" sounds are reduced. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、骨伝導スピーカを備えた携帯電話機に関するもので、特に骨伝導スピーカを骨導音によるレシーバ又は気導音によるレシーバとして両方切り替えて使用することができる携帯電話機に関する。   The present invention relates to a cellular phone provided with a bone conduction speaker, and more particularly to a cellular phone that can be used by switching both as a bone conduction speaker or a bone conduction sound receiver.

（背景技術１）
骨伝導スピーカを備えた携帯電話機がある（例えば、特許文献１参照。）。この特許文献１では、骨伝導スピーカの振動は、骨導音として伝達し聴取される。また、外耳道閉塞手段により外耳道を塞いで高騒音の外音が鼓膜に伝達することを阻止している。これにより、高騒音下において明瞭に聴取可能としている。
（背景技術２）
受信音声信号の周波数特性を切り替え可能な移動通信用端末機がある（例えば、特許文献２参照。）。この特許文献２では、（一般スピーカにおいて、）騒音環境や高齢者や難聴者に対応して受信音声信号の周波数特性を手動で切り替えて一般スピーカに供給している。更に、周波数特性を切り替えると出力音量が変化するため、出力音量が変化しないように自動制御している。 (Background Technology 1)
There is a mobile phone provided with a bone conduction speaker (see, for example, Patent Document 1). In Patent Document 1, the vibration of the bone conduction speaker is transmitted and listened as a bone conduction sound. In addition, the ear canal is blocked by the ear canal blocking means to prevent high noise external sound from being transmitted to the eardrum. This makes it possible to hear clearly under high noise.
(Background Technology 2)
There is a mobile communication terminal capable of switching a frequency characteristic of a received audio signal (see, for example, Patent Document 2). In Patent Document 2, the frequency characteristics of the received audio signal are manually switched and supplied to the general speaker (in a general speaker) in response to the noise environment, the elderly, and the deaf. Furthermore, since the output volume changes when the frequency characteristic is switched, automatic control is performed so that the output volume does not change.

（背景技術３）
骨伝導スピーカと一般スピーカの両方を搭載した携帯電話機が市販されている。この携帯電話機においては、いずれかのスピーカを切り替えながらレシーバとして使用している。
特開２００３−３４８２０８号公報（第２〜３頁、図１） 特開平８−２３７１８５号公報（第２頁、第４〜５頁、図２〜図７） (Background Technology 3)
Mobile phones equipped with both bone conduction speakers and general speakers are commercially available. In this cellular phone, any speaker is used as a receiver while switching.
JP 2003-348208 A (pages 2 and 3, FIG. 1) Japanese Patent Laid-Open No. 8-237185 (page 2, pages 4-5, FIGS. 2-7)

従来の背景技術１の携帯電話機では、骨伝導スピーカの振動は、使用者の頭部の骨を伝わって内耳の蝸牛に直接振動を伝える骨導音として聴取される。そのため、高騒音環境での聴取に適した方式である。しかし、高騒音環境ではない通常の環境においては、空気を伝搬して使用者の鼓膜を振動させる気導音のほうが、耳慣れた音として聴取に適している。この気導音についての記載がない。
従来の背景技術２の移動通信用端末機では、高騒音の場合にどのような周波数特性にするかの記載がない。また、一般スピーカのみが気導音として使用されているだけであり、骨導音についての記載はない。
従来の背景技術３の携帯電話機では、骨伝導スピーカを骨導音専用とし、一般スピーカを気導音専用として、切り替えて使用しているが、骨伝導スピーカと一般スピーカの両方を搭載しなければならないという問題がある。 In the mobile phone of the conventional background art 1, the vibration of the bone conduction speaker is heard as a bone conduction sound that is transmitted through the bone of the user's head and directly to the cochlea of the inner ear. Therefore, this method is suitable for listening in a high noise environment. However, in a normal environment that is not a high noise environment, the air conduction sound that propagates air and vibrates the eardrum of the user is more suitable for listening as a sound familiar to the ear. There is no description about this air conduction sound.
In the conventional mobile communication terminal of the background art 2, there is no description of what frequency characteristics to make in the case of high noise. Moreover, only a general speaker is used as an air conduction sound, and there is no description about a bone conduction sound.
In the conventional mobile phone of Background Art 3, the bone conduction speaker is dedicated to bone conduction sound and the general speaker is exclusively used for air conduction sound, and is used by switching, but if both the bone conduction speaker and the general speaker are not mounted. There is a problem of not becoming.

本発明は、上記の問題点を解決するためになされたもので、骨伝導スピーカを、骨導音によるレシーバ又は気導音によるレシーバとして切り替えて使用することにより、骨伝導スピーカのみで、環境に適した聴取が可能な携帯電話機を提供することを目的とする。   The present invention has been made to solve the above-described problems. By switching the bone conduction speaker as a bone conduction sound receiver or an air conduction sound receiver, the bone conduction speaker alone can be used for the environment. An object of the present invention is to provide a mobile phone capable of appropriate listening.

上記目的を達成するために、本発明の携帯電話機は、骨導音用フィルタ特性と当該骨導音用フィルタ特性と比べて高域の出力を低減する気導音用フィルタ特性とを有し、入力された受話音声信号をいずれかのフィルタ特性で処理する音声信号フィルタ部と、前記音声信号フィルタ部の出力である受話音声信号を増幅する増幅手段と、前記増幅手段の出力信号を音声に変換する骨伝導スピーカと、前記増幅手段の増幅度を調整する音量操作手段と、前記音量操作手段の設定値が閾値以上の時に、前記音声信号フィルタ部に対して骨導音用フィルタ特性を設定し、前記音量操作手段の設定値が閾値以下の時に、前記音声信号フィルタ部に対して気導音用フィルタ特性を設定する制御手段とを具備することを特徴とする。   In order to achieve the above object, the cellular phone of the present invention has a bone conduction sound filter characteristic and an air conduction sound filter characteristic that reduces a high frequency output compared to the bone conduction sound filter characteristic, An audio signal filter unit that processes the input received audio signal with any filter characteristic, an amplifying unit that amplifies the received audio signal that is an output of the audio signal filter unit, and an output signal of the amplifying unit is converted into audio A bone conduction speaker, a volume operation unit for adjusting the amplification degree of the amplification unit, and a bone conduction sound filter characteristic for the audio signal filter unit when a set value of the volume operation unit is equal to or greater than a threshold value. And a control means for setting a filter characteristic for air conduction sound for the sound signal filter section when a set value of the volume operation means is equal to or less than a threshold value.

本発明によれば、骨伝導スピーカを、骨導音によるレシーバ又は気導音によるレシーバとして切り替えて使用することにより、骨伝導スピーカのみで、環境に適した聴取が可能となる。   According to the present invention, by switching the bone conduction speaker as a receiver using bone conduction sound or a receiver using air conduction sound, listening suitable for the environment can be performed using only the bone conduction speaker.

以下、本発明の実施例を、図面を参照して説明する。
図１は、本発明の各実施例に係る携帯電話機の構成図である。携帯電話機１００は、アンテナ１、通信部２、音声フィルタ部３、フィルタ係数テーブル４、音声増幅部５、ボリュームキー６、骨伝導スピーカ７、スピーカ位置検出部８、マイクロホン９、制御部１０、ＶＯＸ１１、キー入力部１２などによって構成される。
アンテナ１は、図示しない基地局との間で電波を受信する。通信部２は、復調等の処理を行い受信した受話音声信号を抽出する。音声フィルタ部３は、フィルタ係数テーブル４から読み出されたフィルタ係数によって周波数特性を切り替えるデジタルフィルタであり、通信部２から受信した受話音声信号を骨導音または気導音に適した周波数特性に切り替えて音声増幅部５へ送出する。音声増幅部５は、ユーザがボリュームキー６により指定した増幅度で受話音声信号を増幅して骨伝導スピーカ７へ供給する。骨伝導スピーカ７は受話音声信号を音声に変換して出力し、ユーザはその音声を聞く。 Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a configuration diagram of a mobile phone according to each embodiment of the present invention. The mobile phone 100 includes an antenna 1, a communication unit 2, an audio filter unit 3, a filter coefficient table 4, an audio amplification unit 5, a volume key 6, a bone conduction speaker 7, a speaker position detection unit 8, a microphone 9, a control unit 10, and a VOX 11 , And the key input unit 12.
The antenna 1 receives radio waves with a base station (not shown). The communication unit 2 performs processing such as demodulation and extracts the received reception voice signal. The voice filter unit 3 is a digital filter that switches frequency characteristics according to the filter coefficient read from the filter coefficient table 4, and changes the received voice signal received from the communication unit 2 to a frequency characteristic suitable for bone conduction sound or air conduction sound. The signal is switched and sent to the audio amplification unit 5. The voice amplifying unit 5 amplifies the received voice signal with the amplification degree designated by the user with the volume key 6 and supplies the amplified voice signal to the bone conduction speaker 7. The bone conduction speaker 7 converts the received voice signal into voice and outputs it, and the user listens to the voice.

この骨伝導スピーカ７の機構的な配置は、後述（図３）するように、骨導音用または気導音用の配置をユーザが選択できるようになっている。スピーカ位置検出部８は、骨伝導スピーカ７の配置に機械的に連動するスイッチ等により骨導音用または気導音用のどちらの配置になっているかを検出する。マイクロホン９は、音声入力用であり、ピックアップしたマイクロホン音声を電気信号に変換し、制御部１０の内部のＶＯＸ１１へ送出する。ＶＯＸ１１のＶＯＸ機能はＲＣＲデジタル方式自動車電話システム標準規格に規定されている。ＶＯＸ１１は、ＤＳＰ等から構成されており、マイクロホン音声の人の音声帯域とそれ以外を区別し、音声帯域以外を騒音と判断する。そして、この騒音レベルを出力する。キー入力部１２は、ユーザの入力操作用である。   The mechanical arrangement of the bone conduction speaker 7 is such that the user can select the arrangement for bone conduction sound or air conduction sound, as will be described later (FIG. 3). The speaker position detection unit 8 detects whether the arrangement is for bone conduction sound or air conduction sound by a switch or the like mechanically interlocked with the arrangement of the bone conduction speaker 7. The microphone 9 is for voice input, converts the picked-up microphone voice into an electrical signal, and sends it to the VOX 11 inside the control unit 10. The VOX function of VOX11 is defined in the RCR digital automobile telephone system standard. The VOX 11 is configured by a DSP or the like, and distinguishes between the voice band of the person of the microphone voice and the other, and determines the noise other than the voice band as noise. And this noise level is output. The key input unit 12 is for user input operation.

制御部１０は、次に示す色々な入力を基に、フィルタ係数テーブル４の骨導音または気導音に適したフィルタ係数を選択制御する。制御部１０への色々な入力として、ユーザ操作でボリュームキー６により指定された増幅度、ＶＯＸ１１が判断した騒音レベルの大小、スピーカ位置検出部８が検出した骨伝導スピーカ７の配置、キー入力部１２からのユーザ操作等である。   The control unit 10 selectively controls the filter coefficient suitable for the bone conduction sound or the air conduction sound in the filter coefficient table 4 based on the following various inputs. As various inputs to the control unit 10, the amplification degree specified by the volume key 6 by the user operation, the level of the noise level determined by the VOX 11, the arrangement of the bone conduction speaker 7 detected by the speaker position detection unit 8, the key input unit 12 user operations and the like.

なお、ユーザ操作による入力手段は、ボリュームキー６およびキー入力部１２に限らない。例えば、図示しない加速度センサ、タッチパネル、圧力センサ、タッチセンサ、音声認識入力などであってもよい。また、外部装置から通信やリモコンを介しての入力操作であってもよい。
また、フィルタ係数テーブル４は、音声フィルタ部３の中に設けても良いし、制御部１０の中に設けても良い。結果として、制御部１０の処理により、音声フィルタ部３のフィルタ特性が切り替えられればよい。 Note that the input means by the user operation is not limited to the volume key 6 and the key input unit 12. For example, an acceleration sensor, a touch panel, a pressure sensor, a touch sensor, a voice recognition input, or the like (not shown) may be used. Further, it may be an input operation from an external device via communication or a remote control.
The filter coefficient table 4 may be provided in the audio filter unit 3 or in the control unit 10. As a result, it is only necessary that the filter characteristics of the voice filter unit 3 are switched by the processing of the control unit 10.

図２は、本発明の各実施例に係る骨伝導スピーカの音量出力特性と音声フィルタ部のフィルタ特性を説明する図である。
図２（ａ）は、骨伝導スピーカ７の音量出力特性を説明する図であり、横軸に周波数、縦軸に音量出力を示す。骨伝導スピーカの本来の出力特性７１は、高域部分を強調して設計されている。これは、骨伝導スピーカの振動は、骨導音として使用者の頭部の骨を伝わって内耳の蝸牛に直接振動を伝えるものであるが、生体組織により非線形歪が生じて高音域の知覚が悪くなる。そこで気導音を発する一般的なスピーカよりも高域部分を強調するとより自然に聞こえる。よって骨伝導スピーカの音量出力は高域部分を強調して設計されている。 FIG. 2 is a diagram illustrating the volume output characteristics of the bone conduction speaker and the filter characteristics of the sound filter unit according to each embodiment of the present invention.
FIG. 2A is a diagram for explaining the volume output characteristics of the bone conduction speaker 7, where the horizontal axis indicates frequency and the vertical axis indicates volume output. The original output characteristic 71 of the bone conduction speaker is designed with emphasis on the high frequency region. This is because the vibration of the bone conduction speaker is transmitted through the bone of the user's head as bone conduction sound and directly to the cochlea of the inner ear. Deteriorate. Therefore, it sounds more natural when the high frequency region is emphasized than a general speaker that emits air conduction sound. Therefore, the volume output of the bone conduction speaker is designed with emphasis on the high frequency part.

ところで、骨伝導スピーカの振動は、気導音として空気を伝搬して使用者の鼓膜を振動させることもできる。その場合、骨伝導スピーカ自体の特性は、高域部分が強調されているため、使用者にはシャカシャカと不自然に聞こえてしまうという欠点がある。このため、骨伝導スピーカへの入力信号である受話音声信号の高域を減衰させると、骨伝導スピーカの音量出力は、出力特性７２に示すように、高域部分が減衰した特性となり、気導音として使用してもシャカシャカと不自然な音の発生を抑えることができる。   By the way, the vibration of the bone conduction speaker can also propagate the air as an air conduction sound and vibrate the eardrum of the user. In that case, the characteristic of the bone conduction speaker itself has a drawback that the user feels unnaturalness because the high frequency region is emphasized. For this reason, when the high frequency of the received voice signal which is an input signal to the bone conduction speaker is attenuated, the volume output of the bone conduction speaker becomes a characteristic in which the high frequency part is attenuated as shown in the output characteristic 72, and the air conduction Even if it is used as a sound, generation of unnatural sound can be suppressed.

図２（ｂ）は、骨伝導スピーカへの入力信号となる受話音声信号のフィルタ部３の周波数特性を説明する図である。骨導音用フィルタ特性３１は、略フラットな特性である。気導音用フィルタ特性３２は、骨導音用フィルタ特性３１に比べて、高域を減衰させた特性である。骨導音用フィルタ特性３１を選択すると、骨伝導スピーカの出力特性７１が得られ、気導音用フィルタ特性３２を選択すると、骨伝導スピーカの出力特性７２が得られる。
なお、骨導音用フィルタ特性３１は、略フラットな特性でなくてもよく、骨伝導スピーカの出力特性７１の強調された高域を生かす特性であればよい。その骨導音用フィルタ特性に比較して、気導音用フィルタ特性３２は、高域を減衰させた特性であればよい。また、高域以外の部分に相違があってもよい。 FIG. 2B is a diagram for explaining the frequency characteristics of the filter unit 3 of the received voice signal that is an input signal to the bone conduction speaker. The bone conduction sound filter characteristic 31 is a substantially flat characteristic. The air conduction sound filter characteristic 32 is a characteristic in which a high frequency is attenuated as compared with the bone conduction sound filter characteristic 31. When the bone conduction sound filter characteristic 31 is selected, the output characteristic 71 of the bone conduction speaker is obtained, and when the air conduction sound filter characteristic 32 is selected, the output characteristic 72 of the bone conduction speaker is obtained.
The bone conduction sound filter characteristic 31 may not be a substantially flat characteristic, and may be a characteristic that makes use of the emphasized high frequency of the output characteristic 71 of the bone conduction speaker. Compared to the bone-conducting sound filter characteristic, the air-conducting sound filter characteristic 32 may be any characteristic as long as the high frequency band is attenuated. Further, there may be differences in parts other than the high range.

図３は、本発明の各実施例に係る折り畳み式の携帯電話機の外観図である。
図３（ａ）は、携帯電話機の正面図である。折り畳み式の上筐体２１側に、骨伝導スピーカ７、表示部２２などが配置される。下筐体２３側に、ボリュームキー６、マイクロホン９、キー入力部１２などが配置される。
図３（ｂ）は、骨伝導スピーカが気導音配置の時の携帯電話機の側面図である。一般スピーカの配置と同様に、骨伝導スピーカ７の表面と上筐体２１の表面とがほぼ面一の状態である。
図３（ｃ）は、骨伝導スピーカが骨導音配置の時の携帯電話機の側面図である。骨伝導スピーカ７の表面が上筐体２１の表面から飛び出した構造であり、使用者の頭部の骨に押し付けやすい配置である。骨伝導スピーカ７はスライドできる構造などにより、図３（ｂ）の気導音配置と図３（ｃ）の骨導音配置の両方が可能である。 FIG. 3 is an external view of a foldable mobile phone according to each embodiment of the present invention.
FIG. 3A is a front view of the mobile phone. The bone conduction speaker 7, the display unit 22, and the like are disposed on the foldable upper casing 21 side. On the lower housing 23 side, a volume key 6, a microphone 9, a key input unit 12, and the like are arranged.
FIG. 3B is a side view of the mobile phone when the bone conduction speaker is in the air conduction sound arrangement. Similar to the arrangement of the general speaker, the surface of the bone conduction speaker 7 and the surface of the upper housing 21 are substantially flush with each other.
FIG. 3C is a side view of the mobile phone when the bone conduction speaker is in a bone conduction sound arrangement. The bone conduction speaker 7 has a structure in which the surface of the bone conduction speaker 7 protrudes from the surface of the upper housing 21 and is arranged so as to be easily pressed against the bone of the user's head. The bone conduction speaker 7 can have both the air conduction sound arrangement shown in FIG. 3B and the bone conduction sound arrangement shown in FIG.

使用者は、骨伝導スピーカをスライドさせて、図３（ｂ）の気導音配置と図３（ｃ）の骨導音配置を選択する。どちらの配置状態にあるかは、図示しないスピーカ位置検出部８により検出される。なお、骨伝導スピーカの気導音配置と骨導音配置は、図３（ｂ）、図３（ｃ）に限らず、他の配置であってもよい。骨伝導スピーカの配置選択とスピーカ位置検出は、後述の実施例３のみに関連する。   The user slides the bone conduction speaker to select the air conduction sound arrangement shown in FIG. 3B and the bone conduction sound arrangement shown in FIG. Which arrangement state is present is detected by a speaker position detector 8 (not shown). Note that the air conduction sound arrangement and the bone conduction sound arrangement of the bone conduction speaker are not limited to FIGS. 3B and 3C, and may be other arrangements. Bone conduction speaker arrangement selection and speaker position detection are only relevant to Example 3 described below.

図４は、本発明の実施例１に係る携帯電話機の制御部のボリュームキーに連動した動作フローチャートである。使用者は、骨伝導スピーカ７で受話音声を聞きながら、ボリュームキー６でボリュームを操作設定する。制御部１０は、まず、使用者により操作されたボリュームキー６の設定値を読み取り、閾値と比較する（ステップＳ１）。そして、ボリュームが閾値より大きければ、ボリュームが大に設定してあるのは周囲騒音が大きいからだと判断して、フィルタ係数テーブル４の骨導音用フィルタ係数を選択して、音声フィルタ部３に設定する（ステップＳ２）。それにより、受話音声信号は、略フラットな周波数特性のまま、音声増幅部５を経て、骨伝導スピーカ７に供給される。そして、骨伝導スピーカ７は本来の高域を強調した出力特性７１（図２（ａ））の音声を使用者に対して出力する。   FIG. 4 is an operation flowchart linked to the volume key of the control unit of the mobile phone according to the first embodiment of the present invention. The user operates and sets the volume with the volume key 6 while listening to the received voice with the bone conduction speaker 7. First, the control unit 10 reads the set value of the volume key 6 operated by the user and compares it with a threshold value (step S1). If the volume is larger than the threshold value, it is determined that the volume is set to be large because the ambient noise is large, and the filter coefficient for bone conduction sound in the filter coefficient table 4 is selected, and the audio filter unit 3 is selected. Set (step S2). As a result, the received voice signal is supplied to the bone conduction speaker 7 through the voice amplifying unit 5 while maintaining a substantially flat frequency characteristic. Then, the bone conduction speaker 7 outputs the sound of the output characteristic 71 (FIG. 2A) emphasizing the original high frequency range to the user.

ステップＳ１で、ボリュームが閾値より小さければ、ボリュームが小に設定してあるのは周囲騒音が小さいからだと判断して、フィルタ係数テーブル４の気導音用フィルタ係数を選択して、音声フィルタ部３に設定する（ステップＳ３）。それにより、受話音声信号は、高域が減少されて音声増幅部５を経て、骨伝導スピーカ７に供給される。そして、骨伝導スピーカ７は高域を減少した出力特性７２（図２（ａ））の音声を使用者に対して出力する。
なお、音量操作はボリュームキーに限らず、加速度センサ、タッチパネル、圧力センサ、タッチセンサ、音声認識入力などであってもよい。また、外部装置から通信やリモコンを介しての入力操作であってもよい。 If the volume is smaller than the threshold value in step S1, it is determined that the volume is set low because the ambient noise is low, and the filter coefficient for air conduction sound in the filter coefficient table 4 is selected, and the voice filter unit Is set to 3 (step S3). Thereby, the received voice signal is supplied to the bone conduction speaker 7 through the voice amplifying unit 5 after the high frequency is reduced. And the bone conduction speaker 7 outputs the sound of the output characteristic 72 (FIG. 2 (a)) which reduced the high region to the user.
The volume operation is not limited to the volume key, and may be an acceleration sensor, a touch panel, a pressure sensor, a touch sensor, a voice recognition input, or the like. Further, it may be an input operation from an external device via communication or a remote control.

実施例１によれば、使用者は、骨伝導スピーカの出力特性を手動で切り替えることなく、自動で、ボリュームに連動して、周囲騒音が大きい時には高域を強調した骨導音として受話音声を聞き、周囲騒音が小さい時には高域のシャカシャカ音を低減した気導音として受話音声を聞くことができる。   According to the first embodiment, the user can automatically receive the received voice as a bone-conducted sound that emphasizes the high range when the ambient noise is large, automatically in conjunction with the volume, without manually switching the output characteristics of the bone conduction speaker. When the ambient noise is low, the received voice can be heard as an air conduction sound with reduced high-frequency noise.

図５は、本発明の実施例２に係る携帯電話機の制御部の騒音検出手段に連動した動作フローチャートである。実施例１との相違点を主に説明する。ＶＯＸ１１は、マイクロホン９がピックアップした音声について、人の音声帯域とそれ以外を区別し、音声帯域以外を騒音と判断する。そして、この騒音レベルを出力している。制御部１０は、まず、ＶＯＸ１１の騒音出力を読み取り、閾値と比較する（ステップＳ１１）。そして、騒音出力が閾値より大きければ、フィルタ係数テーブル４の骨導音用フィルタ係数を選択して、音声フィルタ部３に設定する（ステップＳ１２）。それにより、骨伝導スピーカ７は本来の高域を強調した出力特性７１（図２（ａ））の音声を使用者に対して出力する。   FIG. 5 is an operation flowchart linked to the noise detection means of the control unit of the mobile phone according to the second embodiment of the present invention. Differences from the first embodiment will be mainly described. The VOX 11 distinguishes between the voice band picked up by the microphone 9 and the other voice band, and determines the noise other than the voice band as noise. And this noise level is output. First, the control unit 10 reads the noise output of the VOX 11 and compares it with a threshold value (step S11). If the noise output is larger than the threshold value, the bone conduction sound filter coefficient in the filter coefficient table 4 is selected and set in the voice filter unit 3 (step S12). Thereby, the bone conduction speaker 7 outputs the sound of the output characteristic 71 (FIG. 2A) emphasizing the original high frequency to the user.

ステップＳ１１で、騒音出力が閾値より小さければ、フィルタ係数テーブル４の気導音用フィルタ係数を選択して、音声フィルタ部３に設定する（ステップＳ１３）。それにより、骨伝導スピーカ７は高域を減少した出力特性７２（図２（ａ））の音声を使用者に対して出力する。
なお、騒音検出手段としてＶＯＸを用いたが、マイクロホン９とは別に、使用者の送話音声が入りにくい位置にマイクロホン９とは別の騒音検出マイクロホンを設けて、そのマイクロホン出力の大小で直接、騒音を検出してもよい。 If the noise output is smaller than the threshold value in step S11, the filter coefficient for air conduction sound in the filter coefficient table 4 is selected and set in the voice filter unit 3 (step S13). Thereby, the bone conduction speaker 7 outputs the sound of the output characteristic 72 (FIG. 2A) in which the high frequency is reduced to the user.
In addition, although VOX was used as a noise detection means, the noise detection microphone different from the microphone 9 was provided in the position where a user's transmitted voice is hard to enter separately from the microphone 9, and the magnitude of the microphone output directly, Noise may be detected.

実施例２によれば、使用者は、骨伝導スピーカの出力特性を手動で切り替えることなく、自動で、周囲騒音が大きい時には高域を強調した骨導音として受話音声を聞き、周囲騒音が小さい時には高域のシャカシャカ音を低減した気導音として受話音声を聞くことができる。   According to the second embodiment, the user automatically listens to the received voice as a bone-conducted sound emphasizing the high range when the ambient noise is large without manually switching the output characteristics of the bone conduction speaker, and the ambient noise is small. Sometimes the received voice can be heard as an air conduction sound with reduced high-frequency noise.

図６は、本発明の実施例３に係る携帯電話機の制御部の骨伝導スピーカの配置に連動した動作フローチャートである。実施例１との相違点を主に説明する。骨伝導スピーカ７は、図３に示したように、使用者により、骨導音配置と気導音配置のいずれかが選択される。そして、どちらの配置状態にあるかは、スピーカ位置検出部８により検出される。制御部１０は、まず、スピーカ位置検出部８を読み取る（ステップＳ２１）。そして、骨導音配置であれば、フィルタ係数テーブル４の骨導音用フィルタ係数を選択して、音声フィルタ部３に設定する（ステップＳ２２）。それにより、骨伝導スピーカ７は本来の高域を強調した出力特性７１（図２（ａ））の音声を使用者に対して出力する。   FIG. 6 is an operation flowchart linked to the arrangement of the bone conduction speakers of the control unit of the mobile phone according to the third embodiment of the present invention. Differences from the first embodiment will be mainly described. As shown in FIG. 3, the bone conduction speaker 7 is selected by the user from either the bone conduction sound arrangement or the air conduction sound arrangement. The speaker position detection unit 8 detects which arrangement state is in effect. The controller 10 first reads the speaker position detector 8 (step S21). And if it is a bone conduction sound arrangement | positioning, the filter coefficient for bone conduction sounds of the filter coefficient table 4 will be selected and set to the audio | voice filter part 3 (step S22). Thereby, the bone conduction speaker 7 outputs the sound of the output characteristic 71 (FIG. 2A) emphasizing the original high frequency to the user.

ステップＳ２１で、気導音配置であれば、フィルタ係数テーブル４の気導音用フィルタ係数を選択して、音声フィルタ部３に設定する（ステップＳ２３）。それにより、骨伝導スピーカ７は高域を減少した出力特性７２（図２（ａ））の音声を使用者に対して出力する。
実施例３によれば、使用者は、骨伝導スピーカの配置を選択した時に、自動で、高域を強調した骨導音又は、高域のシャカシャカ音を低減した気導音として受話音声を聞くことができる。 If it is air conduction sound arrangement | positioning by step S21, the filter coefficient for air conduction sounds of the filter coefficient table 4 will be selected and set to the audio | voice filter part 3 (step S23). Thereby, the bone conduction speaker 7 outputs the sound of the output characteristic 72 (FIG. 2A) in which the high frequency is reduced to the user.
According to the third embodiment, when the user selects the arrangement of the bone conduction speaker, the user automatically listens to the received voice as a bone conduction sound in which the high range is emphasized or an air conduction sound in which the high range is shattered. be able to.

図７は、本発明の実施例４に係る携帯電話機の制御部のユーザ操作に連動した動作フローチャートである。実施例１との相違点を主に説明する。使用者は、キー入力部１２を操作して、骨導音用フィルタまたは気導音用フィルタのいずれかに選択固定するものである。制御部１０は、まず、キー入力部１２を読み取る（ステップＳ３１）。そして、骨導音フィルタ設定のキー入力であれば、フィルタ係数テーブル４の骨導音用フィルタ係数を選択して、音声フィルタ部３に設定する（ステップＳ３２）。それにより、骨伝導スピーカ７は本来の高域を強調した出力特性７１（図２（ａ））の音声を使用者に対して出力する。   FIG. 7 is an operation flowchart in conjunction with a user operation of the control unit of the mobile phone according to the fourth embodiment of the present invention. Differences from the first embodiment will be mainly described. The user operates the key input unit 12 to selectively fix the bone conduction sound filter or the air conduction sound filter. First, the control unit 10 reads the key input unit 12 (step S31). If it is a key input for bone conduction sound filter setting, the bone conduction sound filter coefficient in the filter coefficient table 4 is selected and set in the voice filter unit 3 (step S32). Thereby, the bone conduction speaker 7 outputs the sound of the output characteristic 71 (FIG. 2A) emphasizing the original high frequency to the user.

ステップＳ３１で、気導音フィルタ設定のキー入力であれば、フィルタ係数テーブル４の気導音用フィルタ係数を選択して、音声フィルタ部３に設定する（ステップＳ３３）。それにより、骨伝導スピーカ７は高域を減少した出力特性７２（図２（ａ））の音声を使用者に対して出力する。
なお、入力操作はキー入力部１２に限らず、加速度センサ、タッチパネル、圧力センサ、タッチセンサ、音声認識入力などであってもよい。また、外部装置から通信やリモコンを介しての入力操作であってもよい。 In step S31, if it is a key input for setting the air conduction sound filter, the air conduction sound filter coefficient in the filter coefficient table 4 is selected and set in the voice filter unit 3 (step S33). Thereby, the bone conduction speaker 7 outputs the sound of the output characteristic 72 (FIG. 2A) in which the high frequency is reduced to the user.
The input operation is not limited to the key input unit 12, and may be an acceleration sensor, a touch panel, a pressure sensor, a touch sensor, a voice recognition input, or the like. Further, it may be an input operation from an external device via communication or a remote control.

実施例４によれば、使用者は、骨伝導スピーカの音響特性を、キー操作で、高域を強調した骨導音又は、高域のシャカシャカ音を低減した気導音のいずれかを選択固定して受話音声を聞くことができる。   According to the fourth embodiment, the user selects and fixes the acoustic characteristics of the bone conduction speaker by selecting the bone conduction sound in which the high range is emphasized or the air conduction sound in which the high range shake noise is reduced by key operation. You can listen to the incoming voice.

本発明の各実施例に係る携帯電話機の構成図。The block diagram of the mobile telephone which concerns on each Example of this invention. 本発明の各実施例に係る骨伝導スピーカの音量出力特性と音声フィルタ部のフィルタ特性を説明する図。The figure explaining the volume output characteristic of the bone conduction speaker which concerns on each Example of this invention, and the filter characteristic of an audio | voice filter part. 本発明の各実施例に係る折り畳み式の携帯電話機の外観図。1 is an external view of a foldable mobile phone according to each embodiment of the present invention. 本発明の実施例１に係る携帯電話機の制御部のボリュームキーに連動した動作フローチャート。3 is an operation flowchart linked to a volume key of a control unit of the mobile phone according to the first embodiment of the present invention. 本発明の実施例２に係る携帯電話機の制御部の騒音検出手段に連動した動作フローチャート。The operation | movement flowchart linked with the noise detection means of the control part of the mobile telephone which concerns on Example 2 of this invention. 本発明の実施例３に係る携帯電話機の制御部の骨伝導スピーカの配置に連動した動作フローチャート。The operation | movement flowchart linked to arrangement | positioning of the bone conduction speaker of the control part of the mobile telephone which concerns on Example 3 of this invention. 本発明の実施例４に係る携帯電話機の制御部のユーザ操作に連動した動作フローチャート。The operation | movement flowchart linked with user operation of the control part of the mobile telephone which concerns on Example 4 of this invention.

符号の説明Explanation of symbols

１ アンテナ
２ 通信部
３ 音声フィルタ部
４ フィルタ係数テーブル
５ 音声増幅部
６ ボリュームキー
７ 骨伝導スピーカ
８ スピーカ位置検出部
９ マイクロホン
１０ 制御部
１１ ＶＯＸ
１２ キー入力部
２１ 上筐体
２２ 表示部
２３ 下筐体
１００ 携帯電話機 DESCRIPTION OF SYMBOLS 1 Antenna 2 Communication part 3 Voice filter part 4 Filter coefficient table 5 Voice amplification part 6 Volume key 7 Bone conduction speaker 8 Speaker position detection part 9 Microphone 10 Control part 11 VOX
12 Key input unit 21 Upper housing 22 Display unit 23 Lower housing 100 Mobile phone

Claims (4)

骨導音用フィルタ特性と当該骨導音用フィルタ特性と比べて高域の出力を低減する気導音用フィルタ特性とを有し、入力された受話音声信号をいずれかのフィルタ特性で処理する音声信号フィルタ部と、
前記音声信号フィルタ部の出力である受話音声信号を増幅する増幅手段と、
前記増幅手段の出力信号を音声に変換する骨伝導スピーカと、
前記増幅手段の増幅度を調整する音量操作手段と、
前記音量操作手段の設定値が閾値以上の時に、前記音声信号フィルタ部に対して骨導音用フィルタ特性を設定し、前記音量操作手段の設定値が閾値以下の時に、前記音声信号フィルタ部に対して気導音用フィルタ特性を設定する制御手段とを
具備することを特徴とする携帯電話機。 It has a bone conduction sound filter characteristic and an air conduction sound filter characteristic that reduces the output of the high frequency compared to the bone conduction sound filter characteristic, and processes the received received voice signal with one of the filter characteristics An audio signal filter section;
Amplifying means for amplifying the received voice signal that is the output of the voice signal filter unit;
A bone conduction speaker for converting the output signal of the amplification means into sound;
Volume control means for adjusting the amplification degree of the amplification means;
When the setting value of the volume operation means is equal to or greater than a threshold value, a bone conduction sound filter characteristic is set for the audio signal filter section, and when the setting value of the volume operation means is equal to or less than the threshold value, And a control means for setting filter characteristics for air conduction sound. 骨導音用フィルタ特性と当該骨導音用フィルタ特性と比べて高域の出力を低減する気導音用フィルタ特性とを有し、入力された受話音声信号をいずれかのフィルタ特性で処理する音声信号フィルタ部と、
前記音声信号フィルタ部の出力である受話音声信号を増幅する増幅手段と、
前記増幅手段の出力信号を音声に変換する骨伝導スピーカと、
周囲騒音を測定する周囲騒音測定手段と、
前記周囲騒音測定手段の測定値が閾値以上の時に、前記音声信号フィルタ部に対して骨導音用フィルタ特性を設定し、前記周囲騒音測定手段の測定値が閾値以下の時に、前記音声信号フィルタ部に対して気導音用フィルタ特性を設定する制御手段とを
具備することを特徴とする携帯電話機。 It has a bone conduction sound filter characteristic and an air conduction sound filter characteristic that reduces the output of the high frequency compared to the bone conduction sound filter characteristic, and processes the received received voice signal with one of the filter characteristics An audio signal filter section;
Amplifying means for amplifying the received voice signal that is the output of the voice signal filter unit;
A bone conduction speaker for converting the output signal of the amplification means into sound;
Ambient noise measuring means for measuring ambient noise;
When the measurement value of the ambient noise measurement means is greater than or equal to a threshold value, a bone conduction sound filter characteristic is set for the audio signal filter unit, and when the measurement value of the ambient noise measurement means is less than or equal to the threshold value, the audio signal filter And a control means for setting a filter characteristic for air conduction sound to the unit. 骨導音用フィルタ特性と当該骨導音用フィルタ特性と比べて高域の出力を低減する気導音用フィルタ特性とを有し、入力された受話音声信号をいずれかのフィルタ特性で処理する音声信号フィルタ部と、
前記音声信号フィルタ部の出力である受話音声信号を増幅する増幅手段と、
前記増幅手段の出力信号を音声に変換する骨伝導スピーカと、
前記骨伝導スピーカを骨導音用と気導音用に切り替えて配置可能な位置切換え手段と、
前記位置切換えを検出する位置検出手段と、
前記位置検出手段が骨導音用配置を検出した時に、前記音声信号フィルタ部に対して骨導音用フィルタ特性を設定し、前記位置検出手段が気導音用配置を検出した時に、前記音声信号フィルタ部に対して気導音用フィルタ特性を設定する制御手段とを
具備することを特徴とする携帯電話機。 It has a bone conduction sound filter characteristic and an air conduction sound filter characteristic that reduces the output of the high frequency compared to the bone conduction sound filter characteristic, and processes the received received voice signal with one of the filter characteristics An audio signal filter section;
Amplifying means for amplifying the received voice signal that is the output of the voice signal filter unit;
A bone conduction speaker for converting the output signal of the amplification means into sound;
Position switching means capable of switching and arranging the bone conduction speaker for bone conduction sound and air conduction sound;
Position detecting means for detecting the position switching;
When the position detection means detects a bone conduction sound arrangement, a bone conduction sound filter characteristic is set for the sound signal filter unit, and when the position detection means detects an air conduction sound arrangement, the sound And a control means for setting a filter characteristic for air conduction sound to the signal filter section. 骨導音用フィルタ特性と当該骨導音用フィルタ特性と比べて高域の出力を低減する気導音用フィルタ特性とを有し、入力された受話音声信号をいずれかのフィルタ特性で処理する音声信号フィルタ部と、
前記音声信号フィルタ部の出力である受話音声信号を増幅する増幅手段と、
前記増幅手段の出力信号を音声に変換する骨伝導スピーカと、
前記骨伝導スピーカを骨導音用と気導音用のいずれで使用するかを指示する切換え操作手段と、
前記切換え操作手段が骨導音用を指示している時に、前記音声信号フィルタ部に対して骨導音用フィルタ特性を設定し、前記切換え操作手段が気導音用を指示している時に、前記音声信号フィルタ部に対して気導音用フィルタ特性を設定する制御手段とを
具備することを特徴とする携帯電話機。 It has a bone conduction sound filter characteristic and an air conduction sound filter characteristic that reduces the output of the high frequency compared to the bone conduction sound filter characteristic, and processes the received received voice signal with one of the filter characteristics An audio signal filter section;
Amplifying means for amplifying the received voice signal that is the output of the voice signal filter unit;
A bone conduction speaker for converting the output signal of the amplification means into sound;
Switching operation means for instructing whether to use the bone conduction speaker for bone conduction sound or air conduction sound;
When the switching operation means is instructing for bone conduction sound, setting the bone conduction sound filter characteristics for the audio signal filter unit, and when the switching operation means is instructing for air conduction sound, And a control means for setting a filter characteristic for air conduction sound for the audio signal filter section.
JP2005199580A 2005-07-08 2005-07-08 Portable telephone Pending JP2007019898A (en)

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