JPH07177259A - Voice channel board using band-compressed voice codec - Google Patents
Voice channel board using band-compressed voice codecInfo
- Publication number
- JPH07177259A JPH07177259A JP32257193A JP32257193A JPH07177259A JP H07177259 A JPH07177259 A JP H07177259A JP 32257193 A JP32257193 A JP 32257193A JP 32257193 A JP32257193 A JP 32257193A JP H07177259 A JPH07177259 A JP H07177259A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- transmission
- reception
- voice
- fax
- 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.)
- Granted
Links
Landscapes
- Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
- Noise Elimination (AREA)
- Telephonic Communication Services (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はモード切替えによりＦＡ
Ｘ（ファクシミリ）信号を伝送出来るようにした、帯域
圧縮音声コーディックを用いた音声チャンネル盤に関
し、特にマルチメディア多重化装置に用いられる、帯域
圧縮音声コーディックを用いた音声チャンネル盤に関す
るものである。BACKGROUND OF THE INVENTION The present invention uses FA by mode switching.
The present invention relates to a voice channel board using a band compression voice codec capable of transmitting an X (facsimile) signal, and particularly to a voice channel board using a band compression voice codec used in a multimedia multiplexer.
【０００２】[0002]
【従来の技術】音声コーディック及びＦＡＸ信号用モデ
ムを用いた伝送装置は実開平１−１３７６５３号公報や
特開昭６４−８９６５２号公報に開示されている。また
マルチメディア多重化装置を含む私設通信網は特開平２
−９２０９１号公報に開示されている。2. Description of the Related Art A transmission device using a voice codec and a fax signal modem is disclosed in Japanese Utility Model Laid-Open No. 1-137653 and Japanese Patent Laid-Open No. 64-89652. Also, a private communication network including a multimedia multiplexer is disclosed in Japanese Patent Laid-Open No. Hei 2
-92091 gazette.
【０００３】８ＫｂｐｓＬＣＥＬＰや１６ＫｂｐｓＭＰ
Ｃなどの帯域圧縮音声コーディックはＦＡＸ信号を伝送
することが出来ないので、これら帯域圧縮音声コーディ
ックを用いた音声チャンネル盤では従来ＦＡＸ信号の有
無のみを検出してＦＡＸ信号が来た場合には音声モード
からＦＡＸモードに切替えることによりＦＡＸ信号の伝
送を可能にしている。8 Kbps LCELP and 16 Kbps MP
Since a band-compressed voice codec such as C cannot transmit a FAX signal, a voice channel board using these band-compressed voice codecs conventionally detects only the presence or absence of a FAX signal and outputs a voice signal when the FAX signal comes. The FAX signal can be transmitted by switching from the mode to the FAX mode.
【０００４】その例を図２に示す。この音声チャンネル
盤１０において、通常はスイッチ１２は音声コーディッ
ク１３側にセットされている。マルチメディア多重化装
置の送信回路（図示せず）の出力信号１１にＦＡＸ信号
が到来すると、ＦＡＸ信号検出器１５にてその信号が検
出され、その結果スイッチ１２はモデム１６側のＦＡＸ
モードに切り替り、ＦＡＸ通信が可能となる。An example thereof is shown in FIG. In the audio channel board 10, the switch 12 is normally set to the audio codec 13 side. When a FAX signal arrives at the output signal 11 of the transmission circuit (not shown) of the multimedia multiplexer, the FAX signal detector 15 detects the signal, and as a result, the switch 12 causes the FAX on the modem 16 side.
The mode is switched to and FAX communication becomes possible.
【０００５】[0005]
【発明が解決しようとする課題】しかしこの従来の方法
では音声通話中に受話器より混入した近接のＦＡＸ端末
の可聴音モニター信号が前記送信回路の出力信号に現れ
ると、この信号をＦＡＸ信号検出器１５がＦＡＸ信号と
して検出し、その結果スイッチ１２がモデム１６側のＦ
ＡＸモードに切替ってしまい、音声通話が切断されてし
まうという問題があった。However, according to this conventional method, when an audible sound monitor signal of a nearby FAX terminal, which is mixed in from the handset during a voice call, appears in the output signal of the transmitting circuit, this signal is sent to the FAX signal detector. 15 is detected as a FAX signal, and as a result, the switch 12 is F on the modem 16 side.
There is a problem that the voice call is disconnected because the mode is switched to the AX mode.
【０００６】又、この対策として一旦音声モードで動作
した場合にはＦＡＸモードに切替らないようにする方法
が考えられるが、この方法だと受話器付きＦＡＸ端末を
手動発着信モードにセットしておいて音声通話後手動に
てＦＡＸ通信を行なうことは不可能となる。As a countermeasure against this, a method may be considered in which the mode is not switched to the FAX mode once it operates in the voice mode. With this method, the FAX terminal with a handset is set to the manual call originating / receiving mode. It is impossible to manually perform FAX communication after a voice call.
【０００７】なお、図２において、１４は多重分離部
（ＭＵＸ）、１７はマルチメディア多重化装置の受信回
路（図示せず）への入力信号である。In FIG. 2, 14 is a demultiplexer (MUX), and 17 is an input signal to a receiving circuit (not shown) of the multimedia multiplexer.
【０００８】本発明の課題は、音声通話中に受話器に混
入した近接のＦＡＸ端末の可聴音モニター信号により誤
ってＦＡＸモードに切替り音声通話が切断することがな
い、帯域圧縮音声コーディックを用いた音声チャンネル
盤を提供することにある。An object of the present invention is to use a band-compressed voice codec in which a voice call is not accidentally switched to a fax mode by an audible sound monitor signal of a nearby fax terminal mixed in a handset during a voice call and the voice call is not disconnected. It is to provide an audio channel board.
【０００９】[0009]
【課題を解決するための手段】本発明によれば、盤送信
入力端子と盤送信出力端子と盤受信入力端子と盤受信出
力端子とを有する音声チャンネル盤において、コーディ
ック送信入力端子及びコーディック受信出力端子を有
し、前記コーディック送信入力端子に受けた送信音声信
号を、帯域圧縮送信音声信号に帯域圧縮して、この帯域
圧縮送信音声信号を前記盤送信出力端子に与え、前記盤
受信入力端子から帯域圧縮受信音声信号を受け、この帯
域圧縮受信音声信号を受信音声信号に帯域伸張して、こ
の受信音声信号を前記コーディック受信出力端子に与え
る音声コーデックと；モデム送信入力端子及びモデム受
信出力端子を有し、前記モデム送信入力端子に受けた送
信ＦＡＸ信号を、変調送信ＦＡＸ信号に変調して、この
変調送信ＦＡＸ信号を前記盤送信出力端子に与え、前記
盤受信入力端子から変調受信ＦＡＸ信号を受け、この変
調受信ＦＡＸ信号を受信ＦＡＸ信号に復調して、この受
信ＦＡＸ信号を前記モデム受信出力端子に与えるモデム
と；制御信号端子を有し、この制御信号端子に制御信号
を受けていない時は、前記盤送信入力端子に受けた盤送
信入力信号を前記コーディック送信入力端子に与えると
共に、前記コーディック受信出力端子の信号を前記盤送
信出力端子に与え、前記制御信号端子に前記制御信号を
受けている時は、前記盤送信入力端子に受けた盤送信入
力信号を前記モデム送信入力端子に与えると共に、前記
モデム受信出力端子の信号を前記盤送信出力端子に与え
るスイッチと；前記コーディック送信入力端子に接続さ
れ、前記スイッチを介して前記コーディック送信入力端
子に与えられている前記盤送信入力信号が前記送信ＦＡ
Ｘ信号であることを検出し、ＦＡＸ検出信号を出力する
ＦＡＸ信号検出器と；前記コーディック送信入力端子に
接続され、前記スイッチを介して前記コーディック送信
入力端子に与えられている前記盤送信入力信号が前記送
信音声信号であることを検出し、送信音声検出信号を出
力する送信音声信号検出器と；前記コーディック受信出
力端子に接続され、前記コーディック受信出力端子に前
記受信音声信号が存在することを検出し、受信音声検出
信号を出力する受信音声検出器と；前記ＦＡＸ信号検出
器と前記送信音声信号検出器と前記受信音声検出器とに
接続され、前記ＦＡＸ信号検出器が前記ＦＡＸ検出信号
を出力した時で、前記送信音声信号検出器が前記送信音
声検出信号を出力しておらず、かつ前記受信音声検出器
が前記受信音声検出信号を出力していない時に、前記制
御信号を発生し、この制御信号を前記スイッチに与える
制御回路とを；を有することを特徴とする帯域圧縮音声
コーディックを用いた音声チャンネル盤が得られる。According to the present invention, in a voice channel board having a board transmission input terminal, a board transmission output terminal, a board reception input terminal and a board reception output terminal, a codec transmission input terminal and a codec reception output are provided. A terminal, and the transmission audio signal received by the codec transmission input terminal is band-compressed into a band-compressed transmission audio signal, and this band-compressed transmission audio signal is given to the board transmission output terminal. An audio codec for receiving the band-compressed reception voice signal, band-expanding the band-compression reception voice signal to the reception voice signal, and applying the reception voice signal to the codec reception output terminal; a modem transmission input terminal and a modem reception output terminal The transmission FAX signal received by the modem transmission input terminal is modulated into a modulation transmission FAX signal, and the modulation transmission FAX signal is generated. A modem for giving to the board transmission output terminal, receiving a modulated reception FAX signal from the board reception input terminal, demodulating this modulated reception FAX signal into a reception FAX signal, and giving this reception FAX signal to the modem reception output terminal; When a control signal terminal is provided and no control signal is received at this control signal terminal, the board transmission input signal received at the board transmission input terminal is given to the codec transmission input terminal, and a signal at the codec reception output terminal is provided. To the panel transmission output terminal and the control signal terminal receives the control signal, the panel transmission input signal received at the panel transmission input terminal is applied to the modem transmission input terminal and the modem reception output is applied. A switch for applying a signal from the terminal to the board transmission output terminal; connected to the codec transmission input terminal, and connecting to the codec through the switch. Tsu the panel transmission input signal applied to the click transmission input terminal said transmission FA
A FAX signal detector that detects that the signal is an X signal and outputs a FAX detection signal; the panel transmission input signal connected to the codec transmission input terminal and provided to the codec transmission input terminal through the switch Is a transmission voice signal and outputs a transmission voice detection signal; and a transmission voice signal detector; connected to the codec reception output terminal, wherein the reception voice signal is present at the codec reception output terminal A reception voice detector that detects and outputs a reception voice detection signal; connected to the FAX signal detector, the transmission voice signal detector, and the reception voice detector, and the FAX signal detector outputs the FAX detection signal. When output, the transmission voice signal detector does not output the transmission voice detection signal, and the reception voice detector detects the reception voice detection signal. When no output signal, generates the control signal, and a control circuit for providing the control signal to the switch; voice channel plate is obtained using a band compressed audio codec, characterized in that it comprises a.
【００１０】更に本発明によれば、前記盤送信入力端子
及び前記盤送信出力端子がそれぞれマルチメディア多重
化装置の送信回路及び受信回路に接続されていることを
特徴とする帯域圧縮音声コーディックを用いた音声チャ
ンネル盤が得られる。Further, according to the present invention, the band compression voice codec is characterized in that the board transmission input terminal and the board transmission output terminal are respectively connected to the transmission circuit and the reception circuit of the multimedia multiplexer. You can get the audio channel board.
【００１１】[0011]
【実施例】次に、本発明の実施例について図面を参照し
て説明する。Embodiments of the present invention will now be described with reference to the drawings.
【００１２】図１を参照すると、本発明の一実施例によ
る帯域圧縮音声コーディックを用いた音声チャンネル盤
１０は、盤送信入力端子３１と盤送信出力端子３２と盤
受信入力端子３３と盤受信出力端子３４とを有する。本
音声チャンネル盤１０は、コーディック送信入力端子３
５及びコーディック受信出力端子３６を持つ音声コーデ
ック１３を有する。音声コーデック１３は、コーディッ
ク送信入力端子３５に受けた送信音声信号を、帯域圧縮
送信音声信号に帯域圧縮して、この帯域圧縮送信音声信
号を多重分離部１４を介して盤送信出力端子３４に与
え、盤受信入力端子３３から帯域圧縮受信音声信号を受
け、この帯域圧縮受信音声信号を受信音声信号に帯域伸
張して、この受信音声信号を多重分離部１４を介してコ
ーディック受信出力端子３６に与える。Referring to FIG. 1, a voice channel board 10 using a band-compressed voice codec according to an embodiment of the present invention includes a board transmission input terminal 31, a board transmission output terminal 32, a board reception input terminal 33, and a board reception output. And a terminal 34. This audio channel board 10 has a cordic transmission input terminal 3
5 and a codec 13 having a codec reception output terminal 36. The audio codec 13 band-compresses the transmission audio signal received by the codec transmission input terminal 35 into a band compression transmission audio signal, and supplies this band compression transmission audio signal to the panel transmission output terminal 34 via the demultiplexing unit 14. , Receives a band-compressed reception audio signal from the board reception input terminal 33, expands the band of the band-compression reception audio signal into a reception audio signal, and supplies the reception audio signal to the codec reception output terminal 36 via the demultiplexing unit 14. .
【００１３】モデム１６は、モデム送信入力端子３７及
びモデム受信出力端子３８を有する。このモデム１６
は、モデム送信入力端子３７に受けた送信ＦＡＸ信号
を、変調送信ＦＡＸ信号に変調して、この変調送信ＦＡ
Ｘ信号を多重分離部１４を介して盤送信出力端子３４に
与え、盤受信入力端子３３から多重分離部１４を介して
変調受信ＦＡＸ信号を受け、この変調受信ＦＡＸ信号を
受信ＦＡＸ信号に復調して、この受信ＦＡＸ信号をモデ
ム受信出力端子３８に与える。The modem 16 has a modem transmission input terminal 37 and a modem reception output terminal 38. This modem 16
Modulates the transmission FAX signal received by the modem transmission input terminal 37 into a modulation transmission FAX signal, and
The X signal is given to the panel transmission output terminal 34 via the demultiplexing section 14, the modulated reception FAX signal is received from the panel reception input terminal 33 via the demultiplexing section 14, and this modulated reception FAX signal is demodulated into a reception FAX signal. The received FAX signal is applied to the modem reception output terminal 38.
【００１４】スイッチ１２は、制御信号端子３９を有す
る。スイッチ１２は、この制御信号端子３９に制御信号
を受けていない時は、盤送信入力端子３１に受けた盤送
信入力信号をコーディック送信入力端子３５に与えると
共に、コーディック受信出力端子３６の信号を盤送信出
力端子３２に与え、制御信号端子３９に前記制御信号を
受けている時は、盤送信入力端子３１に受けた盤送信入
力信号をモデム送信入力端子３７に与えると共に、モデ
ム受信出力端子３８の信号を盤送信出力端子３２に与え
る。The switch 12 has a control signal terminal 39. When the switch 12 does not receive the control signal at the control signal terminal 39, the switch 12 provides the board transmission input signal received at the board transmission input terminal 31 to the codec transmission input terminal 35 and the signal at the codec reception output terminal 36. When the transmission output terminal 32 is supplied and the control signal terminal 39 is receiving the control signal, the board transmission input signal received by the board transmission input terminal 31 is supplied to the modem transmission input terminal 37 and the modem reception output terminal 38 is supplied. The signal is given to the board transmission output terminal 32.
【００１５】ＦＡＸ信号検出器１５は、コーディック送
信入力端子３５に接続され、スイッチ１２を介してコー
ディック送信入力端子３５に与えられている前記盤送信
入力信号が前記送信ＦＡＸ信号であることを検出し、Ｆ
ＡＸ検出信号を出力する。The FAX signal detector 15 is connected to the codec transmission input terminal 35 and detects that the board transmission input signal given to the codec transmission input terminal 35 via the switch 12 is the transmission FAX signal. , F
The AX detection signal is output.
【００１６】送信音声信号検出器２６は、コーディック
送信入力端子３５に接続され、スイッチ１２を介してコ
ーディック送信入力端子３５に与えられている前記盤送
信入力信号が前記送信音声信号であることを検出し、送
信音声検出信号を出力する。The transmission voice signal detector 26 is connected to the codec transmission input terminal 35 and detects that the board transmission input signal given to the codec transmission input terminal 35 via the switch 12 is the transmission voice signal. Then, the transmission voice detection signal is output.
【００１７】受信音声検出器２７は、コーディック受信
出力端子３６に接続され、コーディック受信出力端子３
６に前記受信音声信号が存在することを検出し、受信音
声検出信号を出力する。The reception voice detector 27 is connected to the codec reception output terminal 36 and is connected to the codec reception output terminal 3
The presence of the received voice signal at 6 is detected, and the received voice detection signal is output.
【００１８】制御回路２８は、ＦＡＸ信号検出器１５と
送信音声信号検出器２６と受信音声検出器２７とに接続
され、ＦＡＸ信号検出器１５がＦＡＸ検出信号を出力し
た時で、送信音声信号検出器２６が送信音声検出信号を
出力しておらず、かつ受信音声検出器２７が受信音声検
出信号を出力していない時に、前記制御信号を発生し、
この制御信号をスイッチ１２に与える。The control circuit 28 is connected to the FAX signal detector 15, the transmission voice signal detector 26, and the reception voice detector 27, and detects the transmission voice signal when the FAX signal detector 15 outputs the FAX detection signal. When the device 26 does not output the transmission voice detection signal and the reception voice detector 27 does not output the reception voice detection signal, the control signal is generated,
This control signal is given to the switch 12.
【００１９】盤送信入力端子３１及び盤送信出力端子３
２がそれぞれマルチメディア多重化装置の送信回路（図
示せず）及び受信回路（図示せず）に接続されている。Board transmission input terminal 31 and board transmission output terminal 3
2 are respectively connected to a transmitter circuit (not shown) and a receiver circuit (not shown) of the multimedia multiplexer.
【００２０】このように、スイッチ１２は音声モードか
ＦＡＸモードかの切替えを行なうようになっており、音
声モードの場合は、前記送信回路の出力信号１１に送ら
れて来た音声信号は音声コーディック１３にて帯域圧縮
され多重分離部１４を経由して出力される。又、ＦＡＸ
モードの場合には、マルチメディア多重化装置の前記送
信回路の出力信号１１に送られて来たＦＡＸ信号はモデ
ム１６、多重分離部１４を経由して出力される。スイッ
チ１２は前記送信回路側に接続されているＦＡＸ信号検
出器２５及び送信音声信号検出器２６と、前記受信回路
側に接続されている受信音声信号検出器２７の検出結果
により制御回路２８にて音声モードかＦＡＸモードかの
切替えを行なうようになっている。In this way, the switch 12 is adapted to switch between the voice mode and the FAX mode. In the voice mode, the voice signal sent to the output signal 11 of the transmitting circuit is the voice codec. It is band-compressed at 13 and output via the demultiplexing unit 14. Also, FAX
In the mode, the FAX signal sent to the output signal 11 of the transmission circuit of the multimedia multiplexer is output via the modem 16 and the demultiplexer 14. The switch 12 is controlled by the control circuit 28 according to the detection results of the FAX signal detector 25 and the transmission voice signal detector 26 connected to the transmission circuit side and the reception voice signal detector 27 connected to the reception circuit side. It is designed to switch between voice mode and FAX mode.
【００２１】本図において通常はスイッチ１２は音声モ
ード側にセットされている。前記送信回路の出力信号１
１にＦＡＸ信号が送られてくると、ＦＡＸ信号検出器１
５にてその信号が検出されＦＡＸモードに切替るように
制御回路２８にその結果を出力するが、同時に送信音声
信号検出器２６及び受信音声信号検出器２７にて音声信
号の有無が検出されており、前記送信回路の出力信号１
１又は前記受信回路への入力信号１７に音声信号が存在
することが検出されると、ＦＡＸ信号検出器１５にてＦ
ＡＸ信号が検出されても制御回路２８はスイッチ１２を
ＦＡＸモードに切替えない。In the figure, the switch 12 is normally set to the voice mode side. Output signal 1 of the transmitter circuit
1 receives a FAX signal, the FAX signal detector 1
The signal is detected at 5 and the result is output to the control circuit 28 so as to switch to the FAX mode, but at the same time, the transmission voice signal detector 26 and the reception voice signal detector 27 detect the presence or absence of a voice signal. Output signal 1 of the transmitter circuit
1 or when the presence of a voice signal in the input signal 17 to the receiving circuit is detected, the FAX signal detector 15 outputs F
Even if the AX signal is detected, the control circuit 28 does not switch the switch 12 to the FAX mode.
【００２２】したがって音声モードで動作している時に
受話器より混入した近接ＦＡＸ端末の可聴音モニター信
号が前記送信回路の出力信号１１に現れＦＡＸ信号検出
器１５にてその信号が検出されても、スイッチ１２はＦ
ＡＸモードに切替ることはない。Therefore, even if the audible sound monitor signal of the proximity FAX terminal mixed from the handset when operating in the voice mode appears in the output signal 11 of the transmission circuit and is detected by the FAX signal detector 15, the switch is activated. 12 is F
It does not switch to AX mode.
【００２３】[0023]
【発明の効果】以上説明したように、本発明によれば、
音声通話中に受話器に混入した近接のＦＡＸ端末の可聴
音モニター信号により誤ってＦＡＸモードに切替り音声
通話が切断することがないという効果が得られる。As described above, according to the present invention,
It is possible to obtain an effect that the audible sound monitor signal of the nearby FAX terminal mixed in the handset during the voice call does not accidentally switch the FAX mode to disconnect the voice call.
【図１】本発明による一実施例による帯域圧縮音声コー
ディックを用いた音声チャンネル盤のブロック図であ
る。FIG. 1 is a block diagram of an audio channel board using a band compression audio codec according to an embodiment of the present invention.
【図２】従来の帯域圧縮音声コーディックを用いた音声
チャンネル盤のブロック図である。FIG. 2 is a block diagram of an audio channel board using a conventional band compression audio codec.
１０ 音声チャンネル盤 １２ スイッチ １３ 音声コーディック １４ 多重分離部 １５ ＦＡＸ信号検出器 １６ モデム ２６ 送信音声信号検出器 ２７ 受信音声信号検出器 ２８ 制御回路 10 voice channel board 12 switch 13 voice codec 14 demultiplexing unit 15 FAX signal detector 16 modem 26 transmission voice signal detector 27 reception voice signal detector 28 control circuit
Claims (2)
信入力端子と盤受信出力端子とを有する音声チャンネル
盤において、 コーディック送信入力端子及びコーディック受信出力端
子を有し、前記コーディック送信入力端子に受けた送信
音声信号を、帯域圧縮送信音声信号に帯域圧縮して、こ
の帯域圧縮送信音声信号を前記盤送信出力端子に与え、
前記盤受信入力端子から帯域圧縮受信音声信号を受け、
この帯域圧縮受信音声信号を受信音声信号に帯域伸張し
て、この受信音声信号を前記コーディック受信出力端子
に与える音声コーデックと；モデム送信入力端子及びモ
デム受信出力端子を有し、前記モデム送信入力端子に受
けた送信ＦＡＸ信号を、変調送信ＦＡＸ信号に変調し
て、この変調送信ＦＡＸ信号を前記盤送信出力端子に与
え、前記盤受信入力端子から変調受信ＦＡＸ信号を受
け、この変調受信ＦＡＸ信号を受信ＦＡＸ信号に復調し
て、この受信ＦＡＸ信号を前記モデム受信出力端子に与
えるモデムと；制御信号端子を有し、この制御信号端子
に制御信号を受けていない時は、前記盤送信入力端子に
受けた盤送信入力信号を前記コーディック送信入力端子
に与えると共に、前記コーディック受信出力端子の信号
を前記盤送信出力端子に与え、前記制御信号端子に前記
制御信号を受けている時は、前記盤送信入力端子に受け
た盤送信入力信号を前記モデム送信入力端子に与えると
共に、前記モデム受信出力端子の信号を前記盤送信出力
端子に与えるスイッチと；前記コーディック送信入力端
子に接続され、前記スイッチを介して前記コーディック
送信入力端子に与えられている前記盤送信入力信号が前
記送信ＦＡＸ信号であることを検出し、ＦＡＸ検出信号
を出力するＦＡＸ信号検出器と；前記コーディック送信
入力端子に接続され、前記スイッチを介して前記コーデ
ィック送信入力端子に与えられている前記盤送信入力信
号が前記送信音声信号であることを検出し、送信音声検
出信号を出力する送信音声信号検出器と；前記コーディ
ック受信出力端子に接続され、前記コーディック受信出
力端子に前記受信音声信号が存在することを検出し、受
信音声検出信号を出力する受信音声検出器と；前記ＦＡ
Ｘ信号検出器と前記送信音声信号検出器と前記受信音声
検出器とに接続され、前記ＦＡＸ信号検出器が前記ＦＡ
Ｘ検出信号を出力した時で、前記送信音声信号検出器が
前記送信音声検出信号を出力しておらず、かつ前記受信
音声検出器が前記受信音声検出信号を出力していない時
に、前記制御信号を発生し、この制御信号を前記スイッ
チに与える制御回路とを；を有することを特徴とする帯
域圧縮音声コーディックを用いた音声チャンネル盤。1. An audio channel board having a board transmission input terminal, a board transmission output terminal, a board reception input terminal, and a board reception output terminal, which has a codec transmission input terminal and a codec reception output terminal, and the codec transmission input terminal. Band-compressing the transmission voice signal received by the band compression transmission voice signal, and applying the band compression transmission voice signal to the panel transmission output terminal,
Receives band compression reception voice signal from the board reception input terminal,
An audio codec for band-expanding the received voice signal to the received voice signal and applying the received voice signal to the codec reception output terminal; and a modem transmission input terminal and a modem reception output terminal, and the modem transmission input terminal The modulated transmission FAX signal is modulated to a modulated transmission FAX signal, the modulated transmission FAX signal is applied to the panel transmission output terminal, the modulated reception FAX signal is received from the panel reception input terminal, and the modulated reception FAX signal is received. A modem which demodulates to a reception FAX signal and gives the reception FAX signal to the modem reception output terminal; a modem having a control signal terminal, and when the control signal terminal does not receive a control signal The received board transmission input signal is given to the codec transmission input terminal, and the signal from the codec reception output terminal is supplied to the board transmission output terminal. When the control signal is received at the control signal terminal, the board transmission input signal received at the board transmission input terminal is applied to the modem transmission input terminal, and the signal at the modem reception output terminal is sent to the board transmission. A switch applied to an output terminal; connected to the codec transmission input terminal, detecting that the panel transmission input signal applied to the codec transmission input terminal via the switch is the transmission FAX signal, and FAX detection A fax signal detector for outputting a signal; detecting that the panel transmission input signal connected to the codec transmission input terminal and given to the codec transmission input terminal via the switch is the transmission voice signal A transmission voice signal detector for outputting a transmission voice detection signal; connected to the codec reception output terminal, Detects that the received audio signal to Ikku reception output terminal is present, the received audio detector which outputs a received voice detection signal; the FA
An X signal detector, the transmission voice signal detector, and the reception voice detector, and the FAX signal detector is connected to the FA
When the X detection signal is output, the transmission voice signal detector does not output the transmission voice detection signal, and the reception voice detector does not output the reception voice detection signal, the control signal And a control circuit for applying the control signal to the switch.
端子がそれぞれマルチメディア多重化装置の送信回路及
び受信回路に接続されていることを特徴とする請求項１
に記載の帯域圧縮音声コーディックを用いた音声チャン
ネル盤。2. The board transmission input terminal and the board transmission output terminal are respectively connected to a transmission circuit and a reception circuit of a multimedia multiplexing apparatus.
An audio channel board using the band compression audio codec described in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32257193A JP2601175B2 (en) | 1993-12-21 | 1993-12-21 | Audio channel board using band-compressed audio codec |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32257193A JP2601175B2 (en) | 1993-12-21 | 1993-12-21 | Audio channel board using band-compressed audio codec |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07177259A true JPH07177259A (en) | 1995-07-14 |
| JP2601175B2 JP2601175B2 (en) | 1997-04-16 |
Family
ID=18145174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32257193A Expired - Lifetime JP2601175B2 (en) | 1993-12-21 | 1993-12-21 | Audio channel board using band-compressed audio codec |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2601175B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100288701B1 (en) * | 1999-03-12 | 2001-04-16 | 윤종용 | Apparatus for controlling voice answer in facsimile |
-
1993
- 1993-12-21 JP JP32257193A patent/JP2601175B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100288701B1 (en) * | 1999-03-12 | 2001-04-16 | 윤종용 | Apparatus for controlling voice answer in facsimile |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2601175B2 (en) | 1997-04-16 |
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|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
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