JP2760480B2 - Image communication device - Google Patents

Image communication device

Info

Publication number
JP2760480B2
JP2760480B2 JP7067751A JP6775195A JP2760480B2 JP 2760480 B2 JP2760480 B2 JP 2760480B2 JP 7067751 A JP7067751 A JP 7067751A JP 6775195 A JP6775195 A JP 6775195A JP 2760480 B2 JP2760480 B2 JP 2760480B2
Authority
JP
Japan
Prior art keywords
signal
communication
line
transmitting
echo suppressor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP7067751A
Other languages
Japanese (ja)
Other versions
JPH07264375A (en
Inventor
一郎 南
義一 古屋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electronics Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electronics Corp filed Critical Matsushita Electronics Corp
Priority to JP7067751A priority Critical patent/JP2760480B2/en
Publication of JPH07264375A publication Critical patent/JPH07264375A/en
Application granted granted Critical
Publication of JP2760480B2 publication Critical patent/JP2760480B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Description

【発明の詳細な説明】 【0001】 【産業上の利用分野】本発明は、全二重通信方式で送信
側が受信側にコマンド信号を送信しながら受信側からの
レスポンス信号を受信するファクシミリ等の画像通信装
に関する。 【0002】 【従来の技術】従来この種のファクシミリ装置は、エコ
ーサプレッサが設定されていない全二重通信の可能な回
線でのみ用いられている。その信号シーケンスを図2を
参照して説明する。 【0003】まず、受信側が着信を検出すると回線に接
続され、送信側に対し被呼局識別信号1を送出する。こ
れに対し、送信側は送信ボタンが押されると回線に接続
され、受信側に位相信号2を送出する。この場合には回
線は全二重通信可能であるために、受信側は位相信号2
を受信しながら位相OK信号3を送信側に送出する。 【0004】以後、送信側が受信側に画信号4を送出し
た後ページ終了信号5を送出すると、送信側は受信側に
受信確認信号6を送出する。 【0005】 【発明が解決しようとする課題】しかしながら、かかる
通信方法にあっては、衛星通信回線のようにエコーサプ
レッサが設置された回線で用いられた場合には、送信側
が位相信号を送信すると交換機のエコーサプレッサが回
線上の信号を検出して反対方向の信号の流れを止める働
きをするために、送信側は受信側からの位相OK信号3
を検出できず、したがって、以後の画信号4、ページ終
了信号5及び受信確認信号6の通信を行うことができな
いという問題点がある。 【0006】本発明は、上述の問題点に鑑みて為された
もので、エコーサプレッサが設置された衛星通信回線等
においてもファクシミリ通信等を行うことができる画像
通信装置を提供することを目的とする。 【0007】 【課題を解決するための手段】本発明は、上述の問題点
を解決するために、エコーサプレッサが設置された通信
回線を用いて画像通信を行う画像通信装置であって、
信手順の開始に先立って前記通信回線へ画像信号とは識
別可能なエコーサプレッサディゼーブル信号を送出する
第1の信号送出手段と、画信号の送信に先立って前記通
信回線へエコーサプレッサイネーブル信号を送出する第
2の信号送出手段と、前記エコーサプレッサディゼーブ
ル信号の送出後に前記通信回線を全二重通信モードとし
て通信手順を実行させ、前記エコーサプレッサイネーブ
ル信号を送出後に前記通信回線を半二重通信モードとし
て画信号を送信させる通信制御手段とを備えたことを特
徴とする。 【0008】 【作用】本発明は、上記構成により、通信手順信号の送
出以前に回線のエコーサプレッサがディセーブルされる
ために回線は全二重通信モードとなり、送信側は通信手
順信号の送出中または送出直後に受信側からのレスポン
ス信号を受信することができ、また、画信号の送出以前
に回線のエコーサプレッサがイネーブルされるために回
線の全二重通信状態は解除され、回線を半二重通信モー
ドとすることができ、エコーによる歪を防止することが
できる。 【0009】 【実施例】以下、図面を参照して本発明の実施例を説明
する。図1は本発明に係るファクシミリ通信方法の一実
施例を示す信号シーケンス図である。 【0010】まず、受信側が着信を検出すると回線に接
続され、送信側に対し被呼局識別信号11を送出する。
これに対し、送信側は送信ボタンが押されると回線に接
続され、受信側にエコーサプレッサディセーブルトーン
信号12を送出した後位相信号13を送出する。 【0011】ここで、回線が衛星通信回線のようにエコ
ーサプレッサが設定されている場合にもエコーサプレッ
サはディセーブルトーン信号12によりディセーブルさ
れるために回線は全二重通信可能となり、受信側が位相
信号13を受信しながら位相OK信号14を送信側に送
出しても送信側はこの位相OK信号14を受信すること
ができる。 【0012】送信側は位相OK信号14を受信すると、
エコーサプレッサイネーブル信号(無信号)15を送出
し、上記のエコーサプレッサディセーブルを解除する。
したがって、回線はこの無信号15により半二重通信状
態となり、送信側が次に画信号16を送出しても、エコ
ーによる波形歪を防止することができる。 【0013】次いで、送信側は受信側に画信号16を送
出した後ページ終了信号17を送出し、受信側からの受
信確認信号18を待つ。ここで、回線はページ終了信号
17の後が無信号であるために、受信側から受信確認信
号18が送出されると信号が受信側から送信側に流れる
ようにエコーサプレッサが働き、通信が正常に終了す
る。 【0014】尚、エコーサプレッサイネーブル信号15
送出後の画信号16の送出について説明すると、画信号
16がエコーサプレッサディセーブルトーン信号12と
同様に動作する場合がある。この場合にはエコーサプレ
ッサイネーブル信号15を省略して送信しないか、或い
は画信号16をエコーサプレッサディセーブルトーン信
号12と異なる周波数で送信すればよい。 【0015】 【発明の効果】以上説明したように本発明は、通信手順
信号の送出以前に回線のエコーサプレッサがディセーブ
ルされるために回線は全二重通信モードとなり、送信側
は通信手順信号の送出中または送出直後に受信側からの
レスポンス信号を受信することができ、また、画信号の
送出以前に回線のエコーサプレッサがイネーブルされる
ために回線の全二重通信状態は解除され、回線を半二重
通信モードとすることができ、エコーによる歪を防止す
ることができる。従って、エコーサプレッサが設定され
た通信回線を用いてファクシミリ通信を行う場合にも、
その通信手順と画信号の送信とを確実に行うことができ
るという優れた効果を有するものである。
Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile machine and the like in which a transmitting side transmits a command signal to a receiving side and receives a response signal from the receiving side in a full-duplex communication system. Image communication equipment
About the installation . 2. Description of the Related Art Conventionally, this type of facsimile apparatus is used only in a line capable of full-duplex communication without an echo suppressor. The signal sequence will be described with reference to FIG. First, when a receiving side detects an incoming call, it is connected to a line and sends a called station identification signal 1 to the transmitting side. On the other hand, when the transmission button is pressed, the transmission side is connected to the line and transmits the phase signal 2 to the reception side. In this case, since the line is capable of full-duplex communication, the receiving side transmits the phase signal 2
While transmitting the phase OK signal 3 to the transmitting side. [0004] Thereafter, when the transmitting side transmits the image signal 4 to the receiving side and then transmits the page end signal 5, the transmitting side transmits the acknowledgment signal 6 to the receiving side. [0005] However, in such a communication method, when the transmission side transmits a phase signal when used in a line provided with an echo suppressor such as a satellite communication line. In order for the echo suppressor of the switch to detect the signal on the line and stop the flow of the signal in the opposite direction, the transmitting side transmits the phase OK signal 3 from the receiving side.
Therefore, there is a problem that the subsequent communication of the image signal 4, the page end signal 5, and the reception confirmation signal 6 cannot be performed. SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an image capable of performing facsimile communication or the like even on a satellite communication line or the like in which an echo suppressor is installed.
It is an object to provide a communication device . [0007] In order to solve the above-mentioned problems, the present invention provides an image communication apparatus for performing image communication using a communication line provided with an echo suppressor , comprising: identify the image signal to the communication line before the start
First signal transmitting means for transmitting a differentiable echo suppressor disable signal , second signal transmitting means for transmitting an echo suppressor enable signal to the communication line prior to transmission of an image signal, and transmission of the echo suppressor disable signal. Communication control means for causing the communication line to execute a communication procedure after the transmission by setting the communication line to the full-duplex communication mode, and for transmitting the image signal by setting the communication line to the half-duplex communication mode after transmitting the echo suppressor enable signal. Features. According to the present invention, since the echo suppressor of the line is disabled before the transmission of the communication procedure signal, the line enters the full-duplex communication mode, and the transmission side transmits the communication procedure signal. Alternatively, a response signal from the receiving side can be received immediately after transmission, and since the echo suppressor of the line is enabled before the transmission of the image signal, the full-duplex communication state of the line is released, and the line is disconnected for half a second. A double communication mode can be set, and distortion due to echo can be prevented. Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a signal sequence diagram showing one embodiment of a facsimile communication method according to the present invention. First, when the receiving side detects an incoming call, it is connected to the line and sends out the called station identification signal 11 to the transmitting side.
On the other hand, when the transmission button is pressed, the transmission side is connected to the line, transmits the echo suppressor disable tone signal 12 to the reception side, and then transmits the phase signal 13. Here, even when the echo suppressor is set as in the case of a satellite communication line, the echo suppressor is disabled by the disable tone signal 12 so that the line can perform full-duplex communication, and the receiving side becomes Even if the phase OK signal 14 is sent to the transmitting side while receiving the phase signal 13, the transmitting side can receive the phase OK signal 14. When the transmitting side receives the phase OK signal 14,
An echo suppressor enable signal (no signal) 15 is sent out to cancel the echo suppressor disable.
Therefore, the line enters a half-duplex communication state due to the non-signal 15, and even if the transmitting side next sends the image signal 16, it is possible to prevent waveform distortion due to echo. Next, after transmitting the image signal 16 to the receiving side, the transmitting side transmits the page end signal 17 and waits for the reception confirmation signal 18 from the receiving side. Here, since the line has no signal after the page end signal 17, when the reception acknowledgment signal 18 is transmitted from the reception side, the echo suppressor operates so that the signal flows from the reception side to the transmission side, and the communication is normal. To end. The echo suppressor enable signal 15
The transmission of the image signal 16 after the transmission will be described. The image signal 16 may operate in the same manner as the echo suppressor disable tone signal 12. In this case, the echo suppressor enable signal 15 may be omitted and not transmitted, or the image signal 16 may be transmitted at a frequency different from that of the echo suppressor disable tone signal 12. As described above, according to the present invention, since the echo suppressor of the line is disabled before the transmission of the communication procedure signal, the line enters the full-duplex communication mode, and the transmitting side transmits the communication procedure signal. During or immediately after the transmission of the image signal, a response signal from the receiving side can be received. Also, before the image signal is transmitted, the echo suppressor of the line is enabled. Can be set to the half-duplex communication mode, and distortion due to echo can be prevented. Therefore, even when performing facsimile communication using a communication line in which an echo suppressor is set,
This has an excellent effect that the communication procedure and the transmission of the image signal can be reliably performed.

【図面の簡単な説明】 【図1】本発明に係るファクシミリ通信方法の一実施例
を示す信号シーケンス図 【図2】従来例を示す信号シーケンス図 【符号の説明】 12 エコーサプレッサディセーブルトーン信号 13 位相信号 14 位相OK信号 15 エコーサプレッサイネーブル信号(無信号)
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a signal sequence diagram showing an embodiment of a facsimile communication method according to the present invention. FIG. 2 is a signal sequence diagram showing a conventional example. 13 phase signal 14 phase OK signal 15 echo suppressor enable signal (no signal)

───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6,DB名) H04N 1/32 - 1/36 H04B 3/20 - 3/23──────────────────────────────────────────────────の Continued on the front page (58) Field surveyed (Int. Cl. 6 , DB name) H04N 1/32-1/36 H04B 3/20-3/23

Claims (1)

(57)【特許請求の範囲】 1.エコーサプレッサが設置された通信回線を用いて
像通信を行う画像通信装置であって、通信手順の開始に
先立って前記通信回線へ画像信号とは識別可能なエコー
サプレッサディゼーブル信号を送出する第1の信号送出
手段と、画信号の送信に先立って前記通信回線へエコー
サプレッサイネーブル信号を送出する第2の信号送出手
段と、前記エコーサプレッサディゼーブル信号の送出後
に前記通信回線を全二重通信モードとして通信手順を実
行させ、前記エコーサプレッサイネーブル信号を送出後
に前記通信回線を半二重通信モードとして画信号を送信
させる通信制御手段とを備えたことを特徴とする画像通
信装置
(57) [Claims] Images are sent using a communication line with an echo suppressor.
An image communication device for performing image communication, comprising: an echo that can be distinguished from an image signal to the communication line prior to the start of a communication procedure.
First signal transmitting means for transmitting a suppressor disable signal , second signal transmitting means for transmitting an echo suppressor enable signal to the communication line prior to transmission of an image signal, and the communication after transmitting the echo suppressor disable signal. image comprising the line to execute a communication procedure as full-duplex communication mode and a communication control means for transmitting the image signal to the communication line as a half-duplex communication mode after sending the echo suppressor enable signal Through
Communication device .
JP7067751A 1995-03-27 1995-03-27 Image communication device Expired - Fee Related JP2760480B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7067751A JP2760480B2 (en) 1995-03-27 1995-03-27 Image communication device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7067751A JP2760480B2 (en) 1995-03-27 1995-03-27 Image communication device

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP61207253A Division JPH0620229B2 (en) 1986-09-03 1986-09-03 Communication method

Publications (2)

Publication Number Publication Date
JPH07264375A JPH07264375A (en) 1995-10-13
JP2760480B2 true JP2760480B2 (en) 1998-05-28

Family

ID=13353966

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7067751A Expired - Fee Related JP2760480B2 (en) 1995-03-27 1995-03-27 Image communication device

Country Status (1)

Country Link
JP (1) JP2760480B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101127809B (en) * 2006-08-18 2010-12-01 华为技术有限公司 Control method, device and system for echo eliminator upon fax

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3956589A (en) 1973-11-26 1976-05-11 Paradyne Corporation Data telecommunication system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6087534A (en) * 1983-10-19 1985-05-17 Nec Corp Echo suppressor control system
JPS6199425A (en) * 1984-10-19 1986-05-17 Nippon Telegr & Teleph Corp <Ntt> Echo suppressing circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3956589A (en) 1973-11-26 1976-05-11 Paradyne Corporation Data telecommunication system

Also Published As

Publication number Publication date
JPH07264375A (en) 1995-10-13

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