JPS5966265A - Decode error detecting system - Google Patents
Decode error detecting systemInfo
- Publication number
- JPS5966265A JPS5966265A JP17535182A JP17535182A JPS5966265A JP S5966265 A JPS5966265 A JP S5966265A JP 17535182 A JP17535182 A JP 17535182A JP 17535182 A JP17535182 A JP 17535182A JP S5966265 A JPS5966265 A JP S5966265A
- Authority
- JP
- Japan
- Prior art keywords
- line
- counter
- outputs
- lines
- comparator
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/40—Picture signal circuits
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Facsimile Image Signal Circuits (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明はモディファイド・ハフマン符号化方式等の冗長
度抑圧符号化方式を用いたファクシミＩＪ伝送方式にお
いて、受信符号のデコードエン−発生状況に応じて画品
質の良否を判定するためのデコードエラー検出方式に関
するものである。Detailed Description of the Invention (Field of Industrial Application) The present invention is a facsimile IJ transmission method using a redundancy suppression coding method such as a modified Huffman coding method. This invention relates to a decoding error detection method for determining whether image quality is good or bad.
（従来例の構成とその問題点） ′従来、冗長
度抑圧符号化方式を用いたファクンミリ信号の伝送方式
において、受信画の良否の判定はファクンミリ端末から
出力された受信画を直接目視により行うか、１頁分の画
信号の受信中に検出されたデコードエラ〜のライン数を
計数することにより行っていた。(Configuration of conventional example and its problems) ``Conventionally, in the transmission system of facunmill signal using redundancy suppression coding method, the quality of the received image is judged by direct visual inspection of the received image output from the facunmill terminal. , by counting the number of lines with decoding errors detected during reception of image signals for one page.
しかしながら、前者の場合には必ず・人手を要・すると
いう欠点があり、後者の場合には□画の大きさ、受信モ
ードが標準か高品質かの□違い等゛によ□って許容ライ
ン数を変える必要があり自動受信時・の・処理を複雑に
している等の欠点があっ□た。 ・ ゛（発明の
目的）
本発明はこれらの欠点を解決するだめ、・人手を介さ々
い自動受信の場合においても、予め定めた基準ライン数
りの連続ライン中のデコードエラー゛ ライン数を割数
することにより、受信画の良否を一定の規格で自動的に
判定するようにしたもので以下図面について詳細に説明
する。However, the former case always has the disadvantage of requiring manual labor, and the latter case varies depending on the image size, standard or high quality reception mode, etc. There were disadvantages such as the need to change the number, complicating automatic reception processing.・゛(Objective of the Invention) The present invention has the purpose of solving these drawbacks. ・Even in the case of automatic reception without manual intervention, decoding errors in consecutive lines of a predetermined standard number of lines can be divided into two. The quality of the received image is automatically determined according to a certain standard by counting the number of images, and the drawings will be described in detail below.
（発明の構成及び実施例の説明）
第１図は本発明の一実施例の構成を示すフロック図で、
】はフ、、アクシミリ信号入力端子１．．２は冗 。(Description of Structure and Embodiments of the Invention) FIG. 1 is a block diagram showing the structure of an embodiment of the present invention.
] is F,, axis signal input terminal 1. ．． 2 is redundant.
号のバッファ用ラインメモリ、４は復号化ライン数を計
数するライン数カウンタ、５はデコードエ １ラー数カ
ウンタ、６及び７は比較器、８社基準ライン数りの入力
端子１．９は許容１７４づエラーライン数Ｎの入力端子
、１０は受信不良報告出力端子、１１は受信開始時に各
カウンタ４及び５を初期設定するだめ゛のリセット信号
入力端子、１２は復号化されだファクタξり信号の出力
端□子であ：る。4 is a line counter that counts the number of decoded lines, 5 is a decoding error 1 error counter, 6 and 7 are comparators, 8 company standard line number input terminals 1.9 are allowable 174 10 is an input terminal for the number of error lines N, 10 is a reception failure report output terminal, 11 is a reset signal input terminal for initializing each counter 4 and 5 at the start of reception, and 12 is an input terminal for the undecoded factor ξ signal. It is the output terminal □.
復号器２はフ了り、７ミＩＪ信号入力端子１からの信号
を受けて１ラインの復号□化番□終了する毎にライン終
了信号をライン数カウンタ４に苗力すると共に、デコー
ドエラーが発生した場合にはデコードエラー発生通知を
デ・−、ドエラーライン婆カウンタ５に出力する。、、
う、イン：、数カウンターは、、ライン数を計数し、計
数結果を比較器、６に出力する。デコードエラー数カウ
ンタ５はデコードエラー発生ライン数を計数し、計数結
果を比較□器７に出力する。比較器６はライン数カウン
タ４の出力が基イリ（、ライン数ｐとなったときにライ
ン数カウンタ４及びデコードニジ−数カウンタ５をリセ
ットする。The decoder 2 is turned off, receives the signal from the 7mm IJ signal input terminal 1, and sends a line end signal to the line number counter 4 every time the decoding of one line is completed, and the decoding error is detected. If a decoding error occurs, a decoding error occurrence notification is output to the decoding error line counter 5. ,,
In: The number counter counts the number of lines and outputs the counting result to the comparator 6. A decoding error number counter 5 counts the number of lines in which a decoding error has occurred, and outputs the counting result to a comparator 7. The comparator 6 resets the line number counter 4 and the decode number counter 5 when the output of the line number counter 4 reaches the base number p.
′昆ｉ器、７．．はデｘ −）’ ｘ ５−５イ、数、
８許容デ、−ド５ｒ−（ｙａＮとな、２だ：とき受信不
良報告出力端子１０より受信不良報告を出力する。7. ．． is de x -)' x 5-5 i, number,
8 permissible de, -de 5r-(yaN, 2): When the reception failure report output terminal 10 outputs a reception failure report.
即ち、１頁の画信号を基準ライン数しライン毎の複数フ
ロックに分割し、各ブロック毎にデコードエラーライン
数を検定するものであり、１頁中ｋｌブロックでもデコ
ードエラーライン数が許容デコードエラーライン数Ｎを
越えた場合に受信不第２図は本、発明の一応用例の構成
□図で、１１３”＋）・クシ５り蓄積交換紀１４は網の
端末対応部でてアでシミ、１７端末１５と対応する。
□ファクシミリ、す蓄積交換、網１３はユーザから
の画を網が一旦預った上で各種チー。ヒスを行うことか
らλ端末対応部１４でファクシミリ端末１５との送受信
面の画品質に対し最小限の保証を力えることが必要であ
る。□またファクタｌ ＩＪ蓄積交換網１３は各種の大
きさの画を標準及び高品質のモードが混在した形で相互
通信を行うことから・、端末対応部１４．に本発明を適
用することにより、上記の必要争件を簡易な構成で・実
現できる。In other words, the image signal of one page is divided into a plurality of blocks for each line based on the reference number of lines, and the number of decoded error lines is verified for each block, and even in kl blocks of one page, the number of decoded error lines is within the allowable decoding error. If the number of lines exceeds N, reception is not possible. Figure 2 shows the configuration of an example of application of this invention. 17 corresponds to terminal 15.
□Facsimile, storage and exchange, network 13 receives pictures from users and then sends them to various teams. Since the hiss is performed, it is necessary for the λ terminal support section 14 to provide a minimum guarantee for the image quality of the transmission/reception screen with the facsimile terminal 15. □Furthermore, since the IJ storage and exchange network 13 performs mutual communication with images of various sizes in a mixture of standard and high quality modes, the terminal support unit 14. By applying the present invention to, the above-mentioned necessary issues can be realized with a simple configuration.
（発明の効果）
以上説明したように、本発明によれば人手を介さない自
動受信の場合でも画の大きさやモードによらず、一定の
基準で受信画品質の・良否を判定できる利点があシ１．
実用に供し効果極めて大である。(Effects of the Invention) As explained above, the present invention has the advantage that even in the case of automatic reception without human intervention, it is possible to judge the quality of the received image based on a fixed standard, regardless of the image size or mode. C1.
It is extremely effective in practical use.
第１図は本発明の一実施例の構成を示すブロック図、第
２図は本発明の一応用、例の構成図である。
１ ・・・・・・・・・７アク７ミリ信号入力端子１．
２・・・・・・・・・冗長度抑圧復号器、 ３・・・・
・・・・・バッファ用ラインメモリ、 ４ ・ｉ・・・
・・・・ ライン数カウンタ、 ５・、・・・・・・・
・デコードエラー数カウンタ、６，７ ・・、・・・・
・・・比較器、８ ・・・・・・・・・基準ライン数り
の入力端子、 ９・・・・・・・・・許容デコードエラ
ーライン数Ｎの入力端子、、、、ｌ １０・・・・・
・・受信不良報告出力端子、１１・・・・・・・・・
リセット信号入力端子、１２・・・・・・・・・ファク
シミ、、ＩＪ信号出力端子、１３・・・・・・・・・フ
ァクシミＩＪ蓄積交換網、１４・・・・・・・・・端末
対応部、１５川・・山・ファクシミリ端末。
特許出願人 日本電信電話公社
日本電気株式会社FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, and FIG. 2 is a configuration diagram of an example of an application of the present invention. 1 ・・・・・・・・・7 AC 7mm signal input terminal 1.
2... Redundancy suppression decoder, 3...
...Buffer line memory, 4 ・i...
... Line number counter, 5...
・Decoding error number counter, 6, 7...
... Comparator, 8 ...... Input terminal for the number of reference lines, 9 ...... Input terminal for the number of allowable decoding error lines N, ..., l 10.・・・・・・
...Reception failure report output terminal, 11...
Reset signal input terminal, 12...Facsimile, IJ signal output terminal, 13...Facsimile IJ storage and exchange network, 14...Terminal Correspondence department, 15 rivers, mountains, facsimile terminals. Patent applicant Nippon Telegraph and Telephone Public Corporation NEC Corporation
Claims (1)
式に；いて、受信側ｉ号器に、復号したライン数及、び
１ライン毎のデコードエラーの有無を検出する機′□能
をもだせ、予め定めた基準ライン数りの連続う゛□イン
中におけるデコードエラーの検出されたう箔ン数が、予
め定めた許容デコードエラーライン数Ｎを越えたときに
受信不良と判定するようにしたことを特徴とするデコー
ドエラー検出方式。7 T' taxi signal transmission method using redundancy suppression method; In addition, the receiving side i-coder is equipped with a function to detect the number of decoded lines and the presence or absence of decoding errors for each line. In addition, reception is determined to be poor when the number of lines in which a decoding error is detected during continuous input of a predetermined standard number of lines exceeds a predetermined allowable number of decoding error lines N. A decoding error detection method characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17535182A JPS5966265A (en) | 1982-10-07 | 1982-10-07 | Decode error detecting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17535182A JPS5966265A (en) | 1982-10-07 | 1982-10-07 | Decode error detecting system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5966265A true JPS5966265A (en) | 1984-04-14 |
| JPH0227869B2 JPH0227869B2 (en) | 1990-06-20 |
Family
ID=15994545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17535182A Granted JPS5966265A (en) | 1982-10-07 | 1982-10-07 | Decode error detecting system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5966265A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5384621A (en) * | 1976-12-30 | 1978-07-26 | Fujitsu Ltd | Error resending system of picture signal |
| JPS53122314A (en) * | 1977-04-01 | 1978-10-25 | Hitachi Ltd | Facsimile set and its system |
| JPS5473511A (en) * | 1977-11-25 | 1979-06-12 | Nec Corp | Transmission error detector device for facsimile |
| JPS58196767A (en) * | 1982-05-12 | 1983-11-16 | Hitachi Ltd | Error detection system |
-
1982
- 1982-10-07 JP JP17535182A patent/JPS5966265A/en active Granted
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5384621A (en) * | 1976-12-30 | 1978-07-26 | Fujitsu Ltd | Error resending system of picture signal |
| JPS53122314A (en) * | 1977-04-01 | 1978-10-25 | Hitachi Ltd | Facsimile set and its system |
| JPS5473511A (en) * | 1977-11-25 | 1979-06-12 | Nec Corp | Transmission error detector device for facsimile |
| JPS58196767A (en) * | 1982-05-12 | 1983-11-16 | Hitachi Ltd | Error detection system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0227869B2 (en) | 1990-06-20 |
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