JPS6081974A - Facsimile equipment - Google Patents
Facsimile equipmentInfo
- Publication number
- JPS6081974A JPS6081974A JP19050083A JP19050083A JPS6081974A JP S6081974 A JPS6081974 A JP S6081974A JP 19050083 A JP19050083 A JP 19050083A JP 19050083 A JP19050083 A JP 19050083A JP S6081974 A JPS6081974 A JP S6081974A
- Authority
- JP
- Japan
- Prior art keywords
- tone
- circuit
- modem
- signal
- quality
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Facsimile Image Signal Circuits (AREA)
Abstract
Description
【発明の詳細な説明】 本発明は、ファクシミリ装置に関する。[Detailed description of the invention] The present invention relates to a facsimile device.
従来のファクシミリ装置では、変調器および復調器同期
ずれが発生した場合、画信号伝送上の誤シを復帰しない
ままに１ファクシミリ通信を終了することがあるという
欠点があった。Conventional facsimile apparatuses have a drawback in that when synchronization between the modulator and demodulator occurs, one facsimile communication may end without recovering the error in image signal transmission.
本発明は、送信側の変調器と受信側の復調器との間に、
同期ずれが生じ、画信号伝送上に誤りを認められた場合
、受信側ファクシミリ装置からの品質劣化通知によシ、
送信側から受信側の復調器を復帰させ、画信号伝送を正
常に完了させるファクシミリ装置を提供することを目的
とする。In the present invention, between a transmitting side modulator and a receiving side demodulator,
If a synchronization error occurs and an error is detected in the image signal transmission, a quality deterioration notification from the receiving facsimile machine will be sent.
It is an object of the present invention to provide a facsimile device that restores a demodulator on a receiving side from a transmitting side and normally completes image signal transmission.
本発明のファクタξり装置は、ファクシミリ通信回線上
で画信号を送受信するための変復調回路と、前記送信側
変復調器間の同期のずれによシ生ずる受信画信号データ
に付随するチェックコードのチェックエラーおよび復号
エラーによって前記画信号データの品質を監視する品質
監視回路と、前記品質監視回路からの品質劣化時の出力
に応じて送信側にトーン信号を送出するトーン送出回路
と、そのトーン信号を検出するトーン検出回路と、前記
トーン検出回路がトーンを検出した回数を計数するカウ
ンタと、前記カウンタからの出力に応じて送信側の前記
変復調器を初期化し、受信側の前記変復調器を再トレー
ニングする制御回路とを有することを特徴とする。The factor ξ error device of the present invention checks a check code attached to received image signal data caused by a synchronization difference between a modulation/demodulation circuit for transmitting and receiving image signals on a facsimile communication line and the transmitting modem. a quality monitoring circuit that monitors the quality of the image signal data based on errors and decoding errors; a tone sending circuit that sends out a tone signal to a transmitting side in response to an output from the quality monitoring circuit when the quality deteriorates; a tone detection circuit for detecting a tone, a counter for counting the number of times the tone detection circuit detects a tone, initializing the transmitting side modem according to the output from the counter, and retraining the receiving side modem. The invention is characterized in that it has a control circuit.
次に、本発明の実施例について図面を参照して説明する
。Next, embodiments of the present invention will be described with reference to the drawings.
第１図を参照すると、本発明の実施例は、画信号データ
送受信用の変復調装置（モデムという）１．２と、受信
した画信号データの品質を監視する画信号品質監視回路
３と、画信号データの品質劣化を送信側に通知するため
のトーン信号を発生するトーン送出回路４と、受信側か
らのトーン信号を検出するだめのトーン検出回路５と、
検出したトーン信号の回数を計数するカウンタ６と、カ
ウンタの出力によシモデムを制御するモデム制御回路７
とを含む。Referring to FIG. 1, the embodiment of the present invention includes a modulation/demodulation device (referred to as a modem) 1.2 for transmitting and receiving image signal data, an image signal quality monitoring circuit 3 for monitoring the quality of received image signal data, and an image signal quality monitoring circuit 3 for monitoring the quality of received image signal data. a tone sending circuit 4 that generates a tone signal to notify the transmitting side of quality deterioration of signal data; a tone detecting circuit 5 that detects the tone signal from the receiving side;
A counter 6 that counts the number of detected tone signals, and a modem control circuit 7 that controls the modem based on the output of the counter.
including.
受信した画信号データを画信号品質監視回路３が、所定
のデータ群ごとに監視し、［画信号通信中に送信側と受
信側のモデムの同期ずれにより、データ中のチェックコ
ードのチェックエラーおよび復号時のエラーが発生し、
データの品質が劣化状態に陥った」仁とを認めた場合、
トーン送出回路４に出力を出す。トーン送出回路４は、
品質劣化通知用のある周波数のトーン信号を送信側に対
して送出する。送信側は、このトーン信号をトーン検出
回路５によって受け取り、知時間中にそのトーン信号が
ある回＃！Ｉ検出された時に、送信側はモデムｌを瞬時
初期化して、モデム１からトレーニング信号を送出し、
受信側のモデム２の同期を再確立させて、画信号通信を
正常に再開する。The image signal quality monitoring circuit 3 monitors the received image signal data for each predetermined data group. An error occurred during decryption,
If it is recognized that the quality of the data has deteriorated,
An output is output to the tone sending circuit 4. The tone sending circuit 4 is
A tone signal of a certain frequency for quality deterioration notification is sent to the transmitting side. On the transmitting side, this tone signal is received by the tone detection circuit 5, and the number of times the tone signal is present during the detection time is #! When I is detected, the transmitting side instantaneously initializes modem l, sends a training signal from modem l,
The synchronization of the modem 2 on the receiving side is re-established and image signal communication is resumed normally.
具偉的な手順としては、画信号期間中１で品質劣化通知
信号を受信側よシ規定回数以上受信した場合、送信側か
ら画信号送出を中断し、モデムトレーニング信号を送出
する。このモデムトレーニング送出信号により受信側は
自端末のモデムを再同期させ、再同期に成功したら、モ
デムトレーニング信号に対し、再同期完了通知信号を送
信側に返す。再同期完了通知信号を受けた送信側は改め
て画信号を送出し始める。As a specific procedure, if the receiving side receives the quality deterioration notification signal more than a predetermined number of times during the image signal period 1, the transmitting side interrupts the sending of the image signal and sends a modem training signal. The receiving side resynchronizes its own modem with this modem training transmission signal, and if resynchronization is successful, a resynchronization completion notification signal is returned to the transmitting side in response to the modem training signal. Upon receiving the resynchronization completion notification signal, the transmitting side starts transmitting the image signal again.
本発明は以上ｌ説明したように、受信側からの品質劣化
通知により、モデムの再トレーニングをし、同期を再確
立することで、画信号伝送を正常に完了させるという効
果がある。As described above, the present invention has the effect of successfully completing image signal transmission by retraining the modem and reestablishing synchronization based on the quality deterioration notification from the receiving side.
第１図は、本発明の実施例のブロック図である。
１．２・・・・・・変復調器（モデム）、３・・・・・
・画信号品質監視回路、４・・・・・・トーン送出回路
、５・・・・・・トーン検出回路、６・・・・・・カウ
ンタ、７・・・・・・モデム制御回路。FIG. 1 is a block diagram of an embodiment of the invention. 1.2...Modulator/demodulator (modem), 3...
- Image signal quality monitoring circuit, 4...Tone sending circuit, 5...Tone detection circuit, 6...Counter, 7...Modem control circuit.
Claims (1)
復調回路と、送信側変復調器間の同期のずれＫよシ生ず
る受信画信号データに付随するチェックコードのチェッ
クエラーおよび復号エラーによって前記画信号データの
品質を監視する品質監視回路と、前記品質監視回路から
の品質劣化時の出力に応じて送信側にトーン信号を送出
するトーン送出回路と、そのトーン信号を検出するトー
ン検出回路と、前記トーン検出回路がトーンを検出した
回数を計数するカウンタと、前記カウンタからの出力に
応じて送信側の前記変復調器を初期化し、受信側の前記
変復調器を再トレーニングする制御回路とを有すること
を特徴とするファクシミリ装置。Due to the synchronization difference K between the modulation and demodulation circuit for transmitting and receiving image signals on the facsimile communication line and the transmitting modem, the image signal data is a quality monitoring circuit that monitors quality; a tone sending circuit that sends a tone signal to a transmitting side in response to an output from the quality monitoring circuit when quality deteriorates; a tone detection circuit that detects the tone signal; and the tone detection circuit. It is characterized by comprising a counter that counts the number of times a circuit detects a tone, and a control circuit that initializes the modem on the transmitting side and retrains the modem on the receiving side according to the output from the counter. facsimile machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19050083A JPS6081974A (en) | 1983-10-12 | 1983-10-12 | Facsimile equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19050083A JPS6081974A (en) | 1983-10-12 | 1983-10-12 | Facsimile equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6081974A true JPS6081974A (en) | 1985-05-10 |
Family
ID=16259121
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19050083A Pending JPS6081974A (en) | 1983-10-12 | 1983-10-12 | Facsimile equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6081974A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49131610A (en) * | 1973-04-22 | 1974-12-17 | ||
| JPS5726961A (en) * | 1980-07-24 | 1982-02-13 | Ricoh Co Ltd | Facsimile transmission system |
-
1983
- 1983-10-12 JP JP19050083A patent/JPS6081974A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49131610A (en) * | 1973-04-22 | 1974-12-17 | ||
| JPS5726961A (en) * | 1980-07-24 | 1982-02-13 | Ricoh Co Ltd | Facsimile transmission system |
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