JPS63182974A - Facsimile equipment - Google Patents

Facsimile equipment

Info

Publication number
JPS63182974A
JPS63182974A JP62014908A JP1490887A JPS63182974A JP S63182974 A JPS63182974 A JP S63182974A JP 62014908 A JP62014908 A JP 62014908A JP 1490887 A JP1490887 A JP 1490887A JP S63182974 A JPS63182974 A JP S63182974A
Authority
JP
Japan
Prior art keywords
code
transmission
receiver
circuit
processing time
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
Application number
JP62014908A
Other languages
Japanese (ja)
Inventor
Akira Sugiura
杉浦 昌
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.)
NEC Corp
Original Assignee
NEC 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 NEC Corp filed Critical NEC Corp
Priority to JP62014908A priority Critical patent/JPS63182974A/en
Publication of JPS63182974A publication Critical patent/JPS63182974A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To shorten the time of holding a transmission line and to improve the efficiency of the use of the line by receiving respective information of the reception code storage capacity of a receiver, its longest processing time and its transmission rate by a transmitter, operating a prediction for the adding condition of a supplementary code by using the above-said information, and thus making the code supplement finer. CONSTITUTION:The procedure signal reception circuit 11 of the transmitter receives procedure signals from the receiver. A reception signal storing circuit 12 temporarily stores these procedure signals. A receiver's function identifier circuit 13 takes out a terminal function confirmation information from among the received procedure signals, and identifies a reception code storage capacity, a longest processing time, and a transmission rate which are the function of the receiver. A code supplement instruction circuit 14 predicts the longest processing time from the receiver's function and the function of self-receiver, and predicts the amount of reception code storing in the receiver by using the transmission rate, the reception code storing capacity of the receiver, and the amount of coding of image signals for each scanning line obtained from a coding circuit 16, and calculates a code supplement condition, and outputs a transmission instruction for supplement code. The coding circuit 16 receives image signals, and encodes them into transmission codes, and at the same time adds supplementary codes under the instruction from the instruction circuit 14 in case the quantity of transmission codes is small.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、画信号の伝送符号量が可変で符号化回路・復
号化回路および記録回路の最短処理時間と符号の伝送速
度とで符号の発生時間の差分に補填符号を挿入伝送する
ファクシミリ装置に・関する。
[Detailed Description of the Invention] [Industrial Application Field] The present invention is capable of changing the transmission code amount of an image signal and changing the code by the shortest processing time of the encoding circuit, decoding circuit, and recording circuit and the code transmission speed. This invention relates to a facsimile machine that inserts and transmits a supplementary code into the difference in occurrence time.

〔共通の技術〕[Common technology]

ファクシミリ装置は画信号の伝送効率をあげるため、一
つの走査線ごとに例えば白信号の連続・黒信号の連続を
それぞれ圧縮符号化することにより符号化の抑圧を実施
している。従って走査線ごとの画信号に対する伝送符号
の発生量が変化する。
In order to improve the transmission efficiency of image signals, facsimile machines perform encoding suppression by compressing and encoding, for example, consecutive white signals and consecutive black signals for each scanning line. Therefore, the amount of transmission codes generated for the image signal for each scanning line changes.

例えば走査点ごとに画信号が相違する黒白の複雑な画面
では符号化の抑圧率が小さく伝送符号量が大きい。
For example, in the case of a complex black and white screen in which image signals differ for each scanning point, the coding suppression rate is small and the amount of transmitted code is large.

現在、最も一般的な電話網を介してファクシミリ通信を
する限シ、電話回線の符号伝送速度はあまシ上昇できな
い。一方、画信号の冗長度を抑圧する符号化方式は符号
化器・復号化器の処理時間が著しく短縮されつつある。
Currently, as long as facsimile communication is carried out through the most common telephone network, the code transmission speed of the telephone line cannot be increased much. On the other hand, encoding methods that suppress the redundancy of image signals are rapidly reducing the processing time of encoders and decoders.

従って、送信側でば通常、符号化回路が発生する画信号
の伝送符号発生速度が伝送符号の伝送速度に比較して早
いので伝送符号を一時蓄積する小容量の蓄積回路があれ
ば、伝送符号はほぼ連続して送信できる。一方受信側で
も受信した伝送符号を画信号に復号化する場合復号化速
度が伝送速度に比較して早いので一定査線ごとの伝送符
号量が多いほど復号化余裕の時間が生じる。しかし走査
線ごとの記録時間は一定であり、−走査線の伝送符号量
が小さいときはこの記録中に順次後続の走査線の伝送符
号が到着し受信符号の一時蓄積回路の容量を超過したと
き伝送符号の受信不能状態が発生する。
Therefore, on the transmitting side, since the transmission code generation speed of the image signal generated by the encoding circuit is usually faster than the transmission speed of the transmission code, if there is a storage circuit with a small capacity that temporarily stores the transmission code, it is possible to generate the transmission code. can be transmitted almost continuously. On the other hand, when the received transmission code is decoded into an image signal on the receiving side, the decoding speed is faster than the transmission speed, so the larger the amount of transmission code per fixed scan line, the more time there is for decoding. However, the recording time for each scanning line is constant, and - when the amount of transmission code for a scanning line is small, transmission codes for subsequent scanning lines arrive sequentially during this recording and exceed the capacity of the temporary storage circuit for received codes. A state in which the transmission code cannot be received occurs.

これを避けるため発信側では一定査線に対して、最小伝
送時間を保障する予め定めた最低保障ビット数に不足す
る分、補填符号(所謂FILL符号)を付加する。例え
ば、最低保障ビット数は、発信側での画信号の符号化回
路と、受信側での画信号への復号化回路および記録回路
とのそれぞれで最短処理時間の最も長い処理時間に合わ
せて決定される。通常は記録回路が機構的動作を含むた
め最も長く、従って記録回路の性能によシ最低保障ビ9
)数が設定されることが多い。
In order to avoid this, on the transmitting side, a supplementary code (so-called FILL code) is added to a certain scan line to compensate for the shortfall in the predetermined minimum guaranteed number of bits that guarantees the minimum transmission time. For example, the minimum guaranteed number of bits is determined based on the shortest processing time and the longest processing time for the image signal encoding circuit on the transmitting side and the image signal decoding circuit and recording circuit on the receiving side. be done. Normally, the recording circuit is the longest because it includes mechanical operation, and therefore the minimum guarantee period depends on the performance of the recording circuit.
) number is often set.

最低保障ビャト数を設定する発信側では、受信側の機能
情報をCCITT勧告T30の受信機機能確認手順で受
信する機能識別信号から取出す。性能の優れた新型機種
については標準の機能情報に加え、非標準の機能情報が
受信側から送信側へ非標準機能識別信号(NSF)に含
まれて伝送される。
On the sending side, which sets the minimum guaranteed number of bits, the receiving side's function information is extracted from the function identification signal received in the receiver function confirmation procedure of CCITT Recommendation T30. For new models with superior performance, in addition to standard function information, non-standard function information is transmitted from the receiving side to the transmitting side in a non-standard function identification signal (NSF).

〔従来の技術〕[Conventional technology]

従来のファクシミリ装置は、発信側で受信側から機能識
別信号を受信して符号の発生から記録までの最悪条件を
例えば最短記録時間の10m5と判断し、且つ実行伝送
速度を例えば9600 bpsに設定したとき、走査線
ごとの最少符号量すなわち伝送符号としての最低保障ビ
ット数を(10m5X9600bps=)96ビツトと
して前述の10m5を確保する。
In conventional facsimile machines, the sending side receives a function identification signal from the receiving side, determines the worst condition from code generation to recording to be, for example, the shortest recording time of 10 m5, and sets the effective transmission speed to, for example, 9600 bps. In this case, the minimum code amount for each scanning line, that is, the minimum guaranteed number of bits as a transmission code is (10m5×9600 bps=)96 bits, and the above-mentioned 10m5 is secured.

従って、受信側の伝送符号受信蓄積回路は受信中の伝送
符号に所定量の符号容量を持てばよい。
Therefore, the transmission code reception and storage circuit on the receiving side only needs to have a predetermined amount of code capacity for the transmission code being received.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

上述のように従来のファクシミリ装置は、画信号を符号
化して記録するまでの最悪処理時間と、伝送符号の伝送
速度とがら決定した最低保障ビット数により追加される
補填符号の伝送時間分が回線保留を長びかせるので、特
に遠距離通信による料金、および通信網における回線使
用効率の面で経済性の悪化という問題点があった。
As mentioned above, in conventional facsimile machines, the line is held up due to the worst-case processing time required to encode and record the image signal and the transmission time of the supplementary code, which is added based on the minimum guaranteed number of bits determined based on the transmission speed of the transmission code. This has the problem of deteriorating economic efficiency, especially in terms of long-distance communication fees and line usage efficiency in the communication network.

本発明の目的は上記問題点を解決したファクシミリ装置
を提供することにある。
SUMMARY OF THE INVENTION An object of the present invention is to provide a facsimile machine that solves the above problems.

〔問題点を解決するための手段〕[Means for solving problems]

本発明によるファクシミリ装置は、画信号を符号化した
伝送符号の符号量が可変で、符号化回路。
A facsimile apparatus according to the present invention includes an encoding circuit in which the amount of code of a transmission code that encodes an image signal is variable.

復号化回路および記録回路の最短処理時間から得られる
最悪処理時間と前記伝送符号の伝送速度とで設定される
符号発生時間の差分に補填符号を挿入して伝送する送信
機を少くとも有する。
It has at least a transmitter that inserts a supplementary code into the difference in code generation time set by the worst processing time obtained from the shortest processing time of the decoding circuit and the recording circuit and the transmission speed of the transmission code and transmits the result.

受信機は、端末機能の確認情報に、少なくとも受信符号
蓄積容量情報、最悪処理時間情報および伝送速度情報を
含め、メツセージの伝送に先立つ機能確認手順で送信機
へ送出する。送信機は受信機から受信した確認情報から
取出した情報(少くとも受信符号蓄積容量Φ最悪処理時
間および伝送速度)Kより、通信先受信機の受信符号蓄
積回路に蓄積される伝送符号量を演算予測して所要の補
填符号を付加し伝送符号として送出する。
The receiver includes terminal function confirmation information, including at least received code storage capacity information, worst-case processing time information, and transmission speed information, and sends it to the transmitter in a function confirmation procedure prior to message transmission. The transmitter calculates the amount of transmission codes to be stored in the reception code storage circuit of the destination receiver from the information (at least the reception code storage capacity Φ worst processing time and transmission speed) extracted from the confirmation information received from the receiver. The prediction is made, a necessary supplementary code is added, and the signal is sent out as a transmission code.

〔実施例〕〔Example〕

次に本発明のファクシミリ装置について図面を参照して
説明する。
Next, a facsimile apparatus according to the present invention will be explained with reference to the drawings.

第1図は本発明の一実施例を示す送信機のブロック図で
あわ、各機能プe!9りに共通する制御回路は図示を省
略した。ファクシミリ装置の送信機は接続先受信機とC
CITT勧告T30の接続条件をもって伝送路を閉放す
る。第1図において、送信機は手順信号受信回路11.
受信信号蓄積回路12、受信機機能識別回路13.符号
補填指示回路141画信号発生回路15.符号化回路1
6゜送信符号蓄積回路17、および符号送信回路18を
有する。手順信号受信回路11は受信機から手順信号を
受信する。受信信号蓄積回路12は受信した手順信号を
一時蓄積する。受信機機能識別回路13は受信した手順
信号の中から端末機能確認情報を取出して受信機機能で
ある受信符号蓄積容量、最悪処理時間、伝送速度などを
識別する。符号補填指示回路14は受信機機能と自己の
送信機機能から設定された最悪処理時間および伝送速度
と受信機の受信符号蓄積容量と、符号化回路16から得
る走査線ごとの画信号の符号化量とをもって受信機の受
信符号蓄積量を予測して符号補填条件を演算し補填符号
の送出指示を出力する。画信号発生回路15は画面を走
査して走査線ごとに画素子の色素をディジタル符号化し
画信号として出力する。符号化回路16は画信号を入力
し伝送効率よい伝送符号に符号化する。伝送符号は連続
する画信号の状態により短縮符号化するので走査線ごと
の伝送符号量は不定である。また、符号化回路16は少
い伝送符号量に対して符号補填指示回路14の指示によ
り補填符号を付加する。送信符号蓄積回路17は符号化
回路16の出力を一時蓄積し、符号送信回路18が伝送
符号を送出する。
FIG. 1 is a block diagram of a transmitter showing one embodiment of the present invention. The control circuits common to all 9s are omitted from illustration. The transmitter of the facsimile machine is connected to the destination receiver
The transmission line will be closed using the connection conditions of CITT Recommendation T30. In FIG. 1, the transmitter is a procedural signal receiving circuit 11.
Received signal storage circuit 12, receiver function identification circuit 13. Code replenishment instruction circuit 141 Image signal generation circuit 15. Encoding circuit 1
It has a 6° transmission code storage circuit 17 and a code transmission circuit 18. A procedure signal receiving circuit 11 receives a procedure signal from a receiver. The received signal storage circuit 12 temporarily stores the received procedure signal. The receiver function identification circuit 13 extracts terminal function confirmation information from the received procedure signal and identifies receiver functions such as received code storage capacity, worst processing time, and transmission speed. The code supplement instruction circuit 14 encodes the worst processing time and transmission speed set from the receiver function and its own transmitter function, the received code storage capacity of the receiver, and the image signal for each scanning line obtained from the encoder circuit 16. The received code storage amount of the receiver is predicted based on the amount, code compensation conditions are calculated, and a compensation code transmission instruction is output. The image signal generation circuit 15 scans the screen, digitally encodes the pigment of the pixel element for each scanning line, and outputs it as an image signal. The encoding circuit 16 receives the image signal and encodes it into a transmission code with high transmission efficiency. Since the transmission code is shortened and encoded depending on the state of continuous image signals, the amount of transmission codes for each scanning line is undefined. Furthermore, the encoding circuit 16 adds a supplementary code to a small amount of transmitted codes according to instructions from the code supplementation instruction circuit 14. The transmission code storage circuit 17 temporarily stores the output of the encoding circuit 16, and the code transmission circuit 18 sends out the transmission code.

次に受信機機能識別(ロ)路13が識別する端末機能確
認情報について説明する。端末機能確認情報はCCIT
T勧告T3勧告上30標準機能はディジタル識別信号(
以後DIS信号)且つ非標準機能は非標準機能信号(以
後NSF信号)Kよって受信機から送信機へ伝達される
。本実施例では、受信機の受信符号蓄積容量情報をNS
F信号に含める。最悪処理時間および伝送速度も非標準
値であればNSF信号に含まれる。実行される伝送速度
は自己の送信機機能を配慮して設定される。
Next, the terminal function confirmation information identified by the receiver function identification (b) path 13 will be explained. Terminal function confirmation information is CCIT
T Recommendation T3 Recommendation 30 standard functions include digital identification signals (
A non-standard function signal (hereinafter DIS signal) and a non-standard function signal K (hereinafter NSF signal) are transmitted from the receiver to the transmitter. In this embodiment, the received code storage capacity information of the receiver is
Include in F signal. The worst-case processing time and transmission rate are also included in the NSF signal if they are non-standard values. The transmission rate to be implemented is set taking into consideration the transmitter functionality of the transmitter itself.

符号補填条件は、受信機の受信符号蓄積量[13゜受信
機の最小伝送時間MT 、設定された伝送速度υ、およ
び起こυ得る走査線ごとの最小伝送符号量CMINに対
し、補填符号を付加する閾値りの一例として次の演算式
(1)が設定できる。
The code compensation condition is that a compensation code is added to the received code accumulation amount of the receiver [13°, the minimum transmission time MT of the receiver, the set transmission rate υ, and the minimum transmission code amount CMIN for each scanning line that can occur υ. As an example of the threshold value, the following arithmetic expression (1) can be set.

L≦B−(MT11υ−CMIN )・・・・・・・・
・(1)一方、一つ前の走査線の伝送符号に対する受信
機の受信符号蓄積量Rn−1、受信機の最悪処理時間T
MIN、その走査線の符号量Cとから、受信符号”蓄積
回路の蓄積量anは次式で求められる。
L≦B-(MT11υ-CMIN)・・・・・・・・・
・(1) On the other hand, the received code accumulation amount Rn-1 of the receiver for the transmission code of the previous scanning line, and the worst processing time T of the receiver
From MIN and the code amount C of the scanning line, the storage amount an of the received code storage circuit is determined by the following equation.

an=Rn−1+ (TMIN IIυ−〇)・・・・
・・・・・(2)従って符号補填指示回路14は上記(
2)式の演算により、走査線ごとの伝送符号量Cが受信
機の最悪処理時間TMINに対して TMIN ’υ〉C且つL(an  のと@(TMzN
・υ−C)のど、yト数だけ補填符号を伝送符号として
付加する。
an=Rn-1+ (TMIN IIυ-〇)...
(2) Therefore, the code supplement instruction circuit 14 performs the above (
By calculating the equation 2), the transmission code amount C for each scanning line is calculated as TMIN 'υ〉C and L(an and @(TMzN
- υ-C) Add as many complementary codes as transmission codes.

上記実施例では一つ前の走査線に対する伝送符号量だけ
を演算対象にしたが、(TMIN・υ>C)の条件が連
続する場合の演算式を使用すれば更に効果的である。ま
た、閾値りの計算式(1)は受信機の受信符号蓄積量量
Bの余裕度を考慮して更に木目細かく設定することがで
きる。更に、受信符号蓄積回路の蓄積量anの計算式(
2)も、一つ前の走査線の伝送符号に対する受信符号蓄
積1tRn−1の値や受信機の最悪処理時間TMINの
値等から、より細かい設定を行なう事ができるのはもち
ろんである。
In the above embodiment, only the transmission code amount for the previous scanning line is the subject of calculation, but it is more effective to use an arithmetic expression in which the condition (TMIN·υ>C) is continuous. Moreover, the calculation formula (1) for the threshold value can be set more precisely by taking into consideration the margin of the received code storage amount B of the receiver. Furthermore, the calculation formula for the storage amount an of the reception code storage circuit (
Of course, even in 2), more detailed settings can be made from the value of the received code accumulation 1tRn-1 for the transmission code of the previous scanning line, the value of the worst processing time TMIN of the receiver, etc.

〔発明の効果〕〔Effect of the invention〕

本発明によるファクシミリ装置゛によれば、送信機が受
信機から機能確認情報として受信機の受信符号蓄積容量
、最悪処理時間および伝送速度それぞれの情報を受信し
、これらの情報で補填符号の付加条件を予測演算するよ
うに構成されているので、よシ細かな符号補填が伝送路
の回線保留の短縮を実現し、回線使用効率を向上改善で
きると共に、受信機が新技術によシ進歩改善されたとき
に何の変更なしで対応可能であるという運用上−経済上
の効果が得られる。
According to the facsimile apparatus of the present invention, the transmitter receives information on the received code storage capacity, worst-case processing time, and transmission speed of the receiver as function confirmation information from the receiver, and uses these information to determine supplementary code addition conditions. Since it is configured to perform predictive calculations, fine-grained code compensation can reduce line holding on the transmission line, improve line usage efficiency, and improve the receiver's progress with new technology. This has the operational and economical effect of being able to respond without any changes when the situation arises.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明のファクシミリ装置の一実施例を示す送
信機のブロック図である。
FIG. 1 is a block diagram of a transmitter showing an embodiment of the facsimile apparatus of the present invention.

Claims (1)

【特許請求の範囲】[Claims] 走査線ごとの画信号を符号化した伝送符号の符号量が可
変で、符号化処理、復号化処理および記録処理のそれぞ
れの最短処理時間から得られる走査線ごとの処理系の最
長処理時間を最悪処理時間とし、この最悪処理時間と前
記伝送符号の伝送速度とで設定される符号発生時間の差
分に補填符号を挿入して伝送するファクシミリ装置にお
いて、機能確認手順で接続先受信機から受信する端末機
能の確認情報に含まれる少くとも受信符号蓄積容量、前
記最悪処理時間および伝送速度それぞれの情報を取出し
、通信先受信機の受信符号蓄積回路に蓄積される伝送符
号量を演算予測して所要の補填符号を付加し伝送符号と
して送出する送信機を有することを特徴とするファクシ
ミリ装置。
The code amount of the transmission code that encodes the image signal for each scanning line is variable, and the maximum processing time of the processing system for each scanning line obtained from the shortest processing time of each of encoding processing, decoding processing, and recording processing is the worst case. In a facsimile machine that inserts a supplementary code into the difference in code generation time set by the worst processing time and the transmission speed of the transmission code and transmits the data, the terminal receives the data from the destination receiver in the function check procedure. The information on at least the received code storage capacity, the worst processing time, and the transmission speed included in the function confirmation information is extracted, and the amount of transmitted codes stored in the received code storage circuit of the destination receiver is calculated and predicted. A facsimile device comprising a transmitter that adds a supplementary code and sends it out as a transmission code.
JP62014908A 1987-01-23 1987-01-23 Facsimile equipment Pending JPS63182974A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62014908A JPS63182974A (en) 1987-01-23 1987-01-23 Facsimile equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62014908A JPS63182974A (en) 1987-01-23 1987-01-23 Facsimile equipment

Publications (1)

Publication Number Publication Date
JPS63182974A true JPS63182974A (en) 1988-07-28

Family

ID=11874079

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62014908A Pending JPS63182974A (en) 1987-01-23 1987-01-23 Facsimile equipment

Country Status (1)

Country Link
JP (1) JPS63182974A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5999869A (en) * 1982-11-29 1984-06-08 Canon Inc Facsimile device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5999869A (en) * 1982-11-29 1984-06-08 Canon Inc Facsimile device

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