JPH02291776A - Facsimile equipment - Google Patents

Facsimile equipment

Info

Publication number
JPH02291776A
JPH02291776A JP11306289A JP11306289A JPH02291776A JP H02291776 A JPH02291776 A JP H02291776A JP 11306289 A JP11306289 A JP 11306289A JP 11306289 A JP11306289 A JP 11306289A JP H02291776 A JPH02291776 A JP H02291776A
Authority
JP
Japan
Prior art keywords
page
line
information
line density
data
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
JP11306289A
Other languages
Japanese (ja)
Inventor
Nobuyuki Yasuda
信之 安田
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 JP11306289A priority Critical patent/JPH02291776A/en
Publication of JPH02291776A publication Critical patent/JPH02291776A/en
Pending legal-status Critical Current

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  • Storing Facsimile Image Data (AREA)

Abstract

PURPOSE:To select the best line density and to shorten a transmission time by deciding whether or not there are many change points on the line of a binary-coded signal train from a read part at the time of accumulating as to one page when data are sent out and determining the line density from the result automatically. CONSTITUTION:For example, when the number of change points on one line exceeds 30% of the total number of lines of one page, it is decided that the amount of information of the page is 'large'. Then a decision part 3 for the number of change points in one page outputs information for 'high line density', i.e., line density information 13 at the time of re-encoding. An encoder 4 encodes the binary-coded signal train 11 with 'high line density' by an M<2>R system at the time of re-encoding to match the ability of an opposite-side receiver, and accumulates the encoded data 14, page by page, in pairs with the line density information 13. Then when a large amount of data are broadcast from a memory 5 to many places, they are sent out with the best line density matching the amount of information according to the line density information 13.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、ファクシミリ装置に関し、特に、度圧縮され
た画データを同報等で多対地に向けて大量に配信する際
に圧縮された画データを再符号1ヒし、送出するときの
線密度を、原積の複雑さに応じてページ単位で自動的に
切替える方式に関する. 従来の技術 従来、この種のファクシミリ装置は、送信原稿を一度圧
縮して蓄積するときにオペレータの意思により各ページ
の線密度が設定され、同報等で多対地に向けて大量に配
信する際に前記設定の線密度が優先し、蓄積画データを
復号化し、再符号化され送信されていた.また、ページ
単位での線密度の切替えでないものは、ライン単位で蓄
積画データを復号化した後の再符号化時の変化点の多少
により線密度の切替えを行ったりしていた.発明が解決
しようとする課題 上述した従来のファクシミリ装置は、一度圧縮して蓄積
するときに、オペレータの意思により各ページの線密度
は設定され、回報等で蓄積データを復号化し、再符号化
して送信する際には前述の各ページ毎に設定された線密
度で符号化されて送信されるので、1ページ中の情報量
が少ない原稿でもわざわざ線密度を上げて送ってしまう
こととなり、そのページの伝送時間が長くかかってしま
うという欠点がある.このことは、同報等で、多対地に
向けて大量の文書を伝送する際により顕著となる. また、ライン単位で蓄積データを復号化して生データを
再符号化するときに、各ラインの変化点の多少により線
密度を切替える場合には、それを制御するソフトウェア
等の負荷が大きくなり、且つこの為の処理にライン毎の
線密度指定を行う必要が生じることになり、自社機同志
の対向通信しかできなくなるという欠点があった. 本発明は従来の上記実情に鑑みてなされたものであり、
従って本発明の目的は、従来の技術に内在する上記諸欠
点を解消することを可能とした新規なファクシミリ装置
を提供することにある.課題を解決するための手段 上記目的を達成する為に、本発明に係るファクシミリ装
置は、その送信系において、読取部からの1ライン分の
2値化信号列における白画素と黒画素との変化点を検出
しその変化点の数をライン単位に計数して1ライン分の
変化点数をある閾値で判定しその1ラインの処理を1ペ
ージ分にわたり行い1ラインの変化点数がある間値を超
えるものを計数した値が1ページ中でのある閾値を超え
るか否かにより1ページ中の情報量の多少を判定する手
段と、この処理と並列に行う前記2値化信号列をCCI
TT T.4勧告におけるM2R方式で圧縮する手段と
、該圧縮データと前記1ページ分の情報量を判定してそ
の判定が情報量゜゛大”ならば線密度を“精細”にまた
、情報量“少′゜ならば線密度を“゜標準”に設定する
情報とページ単位で組にして記憶する手段と、同報等で
圧縮データを送信する際に前記記憶手段からのデータを
M2R方式で復号ずる手段と、復号化された生データを
前記ページ毎に付加された情報量の多少による線密度を
設定する情報をもとにページ毎に線密度を切替えながら
再度符号化する手段とを備えて楕成される.これらの符
号化器、復号化器は、相手受信側の能力やまた送信側で
の強制的な線密度の指定により、判定と異なる線密度で
送信するときに使われる. 実施例 次に本発明をその好ましい一実施例について図面を参照
しながら具体的に説明する. 第1図は本発明の一実施例を示すブロック構成図である
. 第1図を参照するに、読取部1がら出力されたライン単
位の2値化信号列11は、1ライン中の変化点検出部2
に入力され、1ライン中の変化点の検出、計数、予め設
定された閾値との比較判定が行われ、判定結果l2が1
ページ分の変化点の判定部3に入力される.例えば、1
ライン1728 b i tとした場合に1ライン中の
変化点数が200以上であれば、そのラインを“複雑”
と判定し、これが1ページの全ライン数の30%を超え
た場合には、そのベージの情報量は“大”と判定され、
1ページ中の変化点数判定部3は再符号化の際に線密度
を“精細”に指定する情報即ち線密度情報l3を出刀す
る.符号化器4は2値化信号列1lを再符号化のときに
相手側受信機の能力にも合わせられるように線密度は“
精細”、符号化方式はM2R方式で符号化し、その符号
化データMをメモリ5に前述の線密度情報13と組にし
てページ単位に蓄積する.復号化器6は、メモリ5がら
の符号化データMを復号化し、2値化信号列1lと同様
の2値化信号列即ち生データl5を得る.ここでは、蓄
積時の線密度情報l3に依らず、相手受信機の能カに合
わせる場合、この生データ15を再び符号化器7を経て
符号化し、符号化データl6として送出する。
DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a facsimile machine, and particularly to a facsimile machine that transmits compressed image data in large quantities to multiple destinations by broadcasting or the like. This paper relates to a method for automatically switching the linear density during re-encoding and transmission on a page-by-page basis depending on the complexity of the original area. Conventional technology Conventionally, in this type of facsimile machine, the linear density of each page is set according to the operator's intention when the original to be sent is compressed and stored. Priority was given to the linear density set above, and the stored image data was decoded, re-encoded, and transmitted. In addition, in systems that do not switch the line density on a page-by-page basis, the line density is switched on a line-by-line basis depending on the number of change points during re-encoding after decoding the stored image data. Problems to be Solved by the Invention In the conventional facsimile machine described above, once the data is compressed and stored, the linear density of each page is set according to the operator's will, and the stored data is decoded and re-encoded by the operator. When sending, each page is encoded and sent at the linear density set for each page, so even if the amount of information on one page is small, the linear density will be increased and the page will be sent. The disadvantage is that it takes a long time to transmit. This becomes more noticeable when transmitting a large amount of documents to multiple destinations, such as by broadcasting. Furthermore, when decoding the accumulated data line by line and re-encoding the raw data, if the line density is switched depending on the number of changing points of each line, the load on the software etc. that controls it increases, and This process required specifying the line density for each line, which had the drawback that only two-way communication was possible between in-house machines. The present invention has been made in view of the above-mentioned conventional situation,
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a new facsimile apparatus that can overcome the above-mentioned disadvantages inherent in the conventional technology. Means for Solving the Problems In order to achieve the above object, the facsimile apparatus according to the present invention detects, in its transmission system, the change between white pixels and black pixels in the binary signal sequence for one line from the reading section. Detect points, count the number of change points for each line, determine the number of change points for one line using a certain threshold, process that one line over one page, and exceed the value for a certain period of time. means for determining the amount of information in one page based on whether the counted value exceeds a certain threshold value in one page;
TT T. The means for compressing using the M2R method in Recommendation 4, the compressed data and the amount of information for one page are judged, and if the judgment is that the amount of information is large, the linear density is set to ``fine'' and the amount of information is ``small''. If it is ゜, there is a means for storing it in pairs with information for setting the linear density to "゜ standard" for each page, and a means for decoding the data from the storage means using the M2R method when transmitting compressed data by broadcasting etc. and a means for re-encoding the decoded raw data while switching the linear density for each page based on information for setting the linear density depending on the amount of information added to each page. It will be done. These encoders and decoders are used when transmitting at a line density that differs from the one determined due to the capabilities of the receiving end or the forced specification of line density on the transmitting side. Embodiment Next, a preferred embodiment of the present invention will be specifically explained with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention. Referring to FIG. 1, the line-by-line binarized signal sequence 11 output from the reading unit 1 is detected by a change point detecting unit 2 in one line.
, the change points in one line are detected, counted, and compared with a preset threshold value, and the judgment result l2 is 1.
The information is input to the change point determination unit 3 for pages. For example, 1
If the line is 1728 bits and the number of change points in one line is 200 or more, that line is considered "complex".
If this exceeds 30% of the total number of lines on one page, the amount of information on that page is determined to be "large",
The change point number determining unit 3 in one page outputs information specifying the line density to be "fine" during re-encoding, that is, line density information l3. When the encoder 4 re-encodes the binary signal sequence 1l, the linear density is set to "
The encoded data M is stored in the memory 5 in pairs with the linear density information 13 in page units.The decoder 6 performs the encoding from the memory 5. Data M is decoded to obtain a binary signal sequence similar to the binary signal sequence 1l, that is, raw data l5.Here, the case where the data is matched to the capabilities of the other receiver, regardless of the linear density information l3 at the time of storage, is , this raw data 15 is encoded again through the encoder 7 and sent out as encoded data l6.

また、同報等で多対地に大量のデータをメモリ5から送
出する際には、線密度情報13により、その情報量に合
わせた最適の線密度で送出する.発明の効果 以上説明したように、本発明によれば、ファクシミリ装
置の送信系において、一度蓄積したデー夕を回報等によ
って蓄積されたデータを送出する際に、その蓄精時にお
いて読取部からの2値化信号列におけるラインの変化点
の多い少ないを1ページにわたって判定し、その結果か
ら該当のページを最短時間で且つ鮮明に伝送可能にする
線密度を自動的に決定することにより、回報通信等で多
対地に大量の原稿を伝送する場合に、最適な線密度が選
択され、伝送時間を短くすることができる効果が得られ
る. また本発明によれば、従来のライン単位の線密度切替え
処理では、自社モードとして、自社機対向通信時のみに
しか使えなかったが、ページ単位で線密度を切替える本
方式であれば従来通りのCCITT T.30手順にの
っとった手順で通信可能である為に、他社機への伝送も
問題なく行うことが可能となる.
Furthermore, when transmitting a large amount of data from the memory 5 to multiple destinations for broadcasting, etc., the linear density information 13 is used to transmit the data at the optimal linear density according to the amount of information. Effects of the Invention As explained above, according to the present invention, in the transmission system of a facsimile machine, when transmitting accumulated data by circular etc. By determining the number of line change points in a binary signal sequence over a page, and automatically determining the line density that allows the corresponding page to be transmitted clearly in the shortest time based on the results, it is possible to broadcast information. When transmitting a large amount of documents to multiple destinations, the optimal linear density is selected and the transmission time can be shortened. Furthermore, according to the present invention, in the conventional linear density switching process for each line, it could only be used as an in-house mode when communicating with the in-house machine, but with this method of switching the line density for each page, it can be used as before. CCITT T. Since communication is possible using the 30-step procedure, transmission to other companies' machines can be performed without any problems.

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

第1図は本発明の一実施例を示すブロック構成図である
. 1・・・読取部、2・・・1ライン中の変化点数判定部
、3・・・1ページ中の変化点数判定部、4・・・符号
化器、5・・・メモリ、6・・・復号化器、7・・・符
号化器、11・・・2値化信号列、12・・・1ライン
中の変化点数判定データ、13・・・1ページ中の変化
点量判定データ、M・・・符号化データ、l5・・・生
データ、16・・・符号化送出データ 特許出願人  日本電気株式会社 代 理 人  弁理士 熊谷雄太郎
FIG. 1 is a block diagram showing an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Reading unit, 2... Determining the number of change points in one line, 3... Determining the number of change points in one page, 4... Encoder, 5... Memory, 6... - Decoder, 7... Encoder, 11... Binarized signal sequence, 12... Data for determining the number of change points in one line, 13... Data for determining the amount of change points in one page, M...Encoded data, l5...Raw data, 16...Encoded transmission data Patent applicant NEC Corporation Representative Patent attorney Yutaro Kumagai

Claims (1)

【特許請求の範囲】 ファクシミリ装置の送信系において、読取部からの1ラ
イン分の2値化信号列における白画素と黒画素との変化
点を検出しその変化点の数をライン単位に計数して1ラ
イン分の変化点数をある閾値で判定し1ページ分の情報
量の多少をある閾値で判定する手段と、前記2値化信号
列を CCITT T.4勧告におけるM^2R方式で圧縮す
る手段と、該圧縮手段による圧縮データと前記1ページ
分の変化点数の多少をある閾値によって判定して線密度
を切替える情報と組にして記憶する手段と、該記憶手段
からデータをM^2R方式で復号する手段と、復号化さ
れた生データを前記の変化点数の多少によって線密度を
切替えながら再度符号化する手段とを有することを特徴
とするファクシミリ装置。
[Claims] In the transmission system of a facsimile machine, the points of change between white pixels and black pixels in one line of binary signal string from the reading section are detected and the number of the points of change is counted for each line. means for determining the number of change points for one line using a certain threshold value and determining the amount of information for one page using a certain threshold value; means for compressing data using the M^2R method in Recommendation No. 4, and means for storing the compressed data by the compression means in combination with information for determining the number of change points for one page using a certain threshold value and switching the linear density; A facsimile apparatus comprising means for decoding data from the storage means using the M^2R method, and means for re-encoding the decoded raw data while switching the linear density depending on the number of change points. .
JP11306289A 1989-05-02 1989-05-02 Facsimile equipment Pending JPH02291776A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11306289A JPH02291776A (en) 1989-05-02 1989-05-02 Facsimile equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11306289A JPH02291776A (en) 1989-05-02 1989-05-02 Facsimile equipment

Publications (1)

Publication Number Publication Date
JPH02291776A true JPH02291776A (en) 1990-12-03

Family

ID=14602535

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11306289A Pending JPH02291776A (en) 1989-05-02 1989-05-02 Facsimile equipment

Country Status (1)

Country Link
JP (1) JPH02291776A (en)

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