JPH05176099A - Interpolating method for error correction incapable data for fax broadcast receiver - Google Patents
Interpolating method for error correction incapable data for fax broadcast receiverInfo
- Publication number
- JPH05176099A JPH05176099A JP3336826A JP33682691A JPH05176099A JP H05176099 A JPH05176099 A JP H05176099A JP 3336826 A JP3336826 A JP 3336826A JP 33682691 A JP33682691 A JP 33682691A JP H05176099 A JPH05176099 A JP H05176099A
- Authority
- JP
- Japan
- Prior art keywords
- error correction
- data
- unit
- picture
- packet
- 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
- Facsimiles In General (AREA)
- Television Systems (AREA)
- Facsimile Transmission Control (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ＦＡＸ受信機がＢＥＳ
Ｔ（（２７２，１９０）短縮化差集合巡回符号を用いる
誤り訂正システム）方式を用い、誤り訂正が出来なかっ
たデータパケットを、補完する方法に関する。BACKGROUND OF THE INVENTION The present invention relates to a FAX receiver which is a BES receiver.
The present invention relates to a method for complementing a data packet that cannot be error-corrected by using the T ((272,190) shortened difference set cyclic code) method.
【０００２】[0002]
【従来の技術】ＦＡＸ（ファクシミリ）放送は、テレビ
ジョン放送電波のすき間を利用して、文字、図形、写真
などを電送するメディアである。特徴として、印刷の形
式を用い情報を家庭や企業など不特定多数の人々に届け
るもので、放送の特質と既存の印刷媒体の特質を合わせ
備えている。また、情報量としては１ページ当たり、Ａ
４版に約４千文字まで収容できる。ディジタル方式の送
信の技術基準概要によれば、画面の構成は、１，７２８
画素からなる走査線２，２８７本で１画面を作る。従っ
て、文字放送等と較べて格段に高精細画像を電送でき
る。従来、ＢＥＳＴ方式により、ＦＡＸ信号のデータパ
ケットの伝送誤り訂正が不能となるのは、１データパケ
ット（２７２ビット）中１１ビット以上の誤りがある場
合であり、この場合、誤り訂正処理部の出力データとし
ては、訂正前の値を出力していた。しかし、この値はあ
くまで誤りを含んでいる値であり、データパケットの補
完について良い方法が提案されていなかった。2. Description of the Related Art FAX (facsimile) broadcasting is a medium for transmitting characters, figures, photographs, etc. by utilizing a gap of a radio wave of television broadcasting. As a feature, it delivers information to an unspecified number of people such as homes and businesses using a printing format, and has both the characteristics of broadcasting and the characteristics of existing print media. The amount of information per page is A
The 4th edition can accommodate up to about 4,000 characters. According to the technical standard outline of digital transmission, the screen configuration is 1,728.
One screen is made up of 2,287 scanning lines made up of pixels. Therefore, a high-definition image can be remarkably transmitted as compared with a character broadcast. Conventionally, the transmission error correction of a data packet of a FAX signal is disabled by the BEST method when there is an error of 11 bits or more in one data packet (272 bits). In this case, the output of the error correction processing unit As data, the value before correction was output. However, this value is a value containing an error to the last, and a good method for complementing a data packet has not been proposed.
【０００３】[0003]
【発明が解決しようとする課題】１データパケット中１
１ビット以上の誤りがある訂正不能が起こった場合、画
像の相関性を利用し、直前のパケット値を用いて補完す
る方法の提案を目的とする。1 out of 1 data packet
It is an object of the present invention to propose a method in which, when an uncorrectable error having one or more bits occurs, the correlation of images is used to complement using the immediately preceding packet value.
【０００４】[0004]
【課題を解決するための手段】上記目的を達成するため
に、信号取り込み部と、誤り訂正部と、制御部と、メモ
リ部と、画像出力部とでなる。In order to achieve the above-mentioned object, a signal acquisition section, an error correction section, a control section, a memory section and an image output section are provided.
【０００５】[0005]
【作用】以上のように構成したので、インターリーブを
解除したデータパケットを受け取り、伝送誤り訂正を行
い、まず、誤り訂正できた値を記憶すると共に出力し
（通常の処理）、次に、誤り訂正できなかった場合、記
憶している直前のパケット値を代わりに出力する。With the above-described structure, the interleaved data packet is received, the transmission error is corrected, the value that has been error-corrected is first stored and output (normal processing), and then the error correction is performed. If not, the immediately previous stored packet value is output instead.
【０００６】[0006]
【実施例】以下、本発明によるＦＡＸ放送受信機の誤り
訂正不能データの補完方法を、図面に基づいて詳細に説
明する。図１は、本発明によるＦＡＸ放送受信機の受画
部にあって補完を実施する部分のシステムブロック図で
ある。１はインターリーブ解除後のデータパケット６を
受け取る信号の取り込み部である。２はＢＥＳＴ方式を
用いた伝送誤り訂正部である。３は誤り訂正の完了した
正しいデータおよび、各部を制御するためのプログラム
等を記憶するメモリ部である。４は誤り訂正後の正しい
データパケットと、本発明による補完データとからなる
パケット形式の画像データを、次段の圧縮復号化ブロッ
クへ出力する画像出力部である。５は各部を制御する制
御部である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method of complementing error correction uncorrectable data of a FAX broadcast receiver according to the present invention will be described in detail below with reference to the drawings. FIG. 1 is a system block diagram of a portion of the image receiving unit of the FAX broadcast receiver according to the present invention, which performs complement. Reference numeral 1 is a signal capturing unit for receiving the data packet 6 after deinterleaving. Reference numeral 2 is a transmission error correction unit using the BEST method. Reference numeral 3 denotes a memory unit that stores correct data for which error correction has been completed and a program for controlling each unit. An image output unit 4 outputs image data in a packet format including correct data packets after error correction and complementary data according to the present invention to a compression / decoding block in the next stage. Reference numeral 5 is a control unit that controls each unit.
【０００７】次に、動作を説明する。図２は、本発明に
よるＦＡＸ放送受信機の誤り訂正不能データの補完方法
を示すフローチャートである。先ず、インターリーブを
解除したデータパケットを受け取り、ＢＥＳＴ方式の誤
り訂正処理を行う（ＳＴＰ１）。１データパケットに含
まれる誤りビットの数により、誤り訂正のできる場合
と、訂正できない場合とに分岐する（ＳＴＰ２）。以
下、誤り訂正のできる場合について説明する。誤り訂正
処理後の正しいデータをメモリ部に記憶する（ＳＴＰ
３）。誤り訂正不能回数を累積計数した計数値を０に戻
す（ＳＴＰ４）。次に、誤り訂正不能の場合について説
明する。誤り訂正不能回数の累積計数値に１を加える
（ＳＴＰ５）。誤り訂正不能回数の値が、例えば、１０
回を越える場合と、それ以下の場合で、２通りの処理に
分岐する（ＳＴＰ６）。１０回以下の場合は、直前にメ
モリ部に記憶した誤り訂正処理後の正しいデータを、誤
り訂正不能なデータの代わりに出力する（ＳＴＰ８）。
１０回以上の場合は、正しいデータを長期にわたり得ら
れず、画像の相関度が低いと考えられるので、固定値例
えば空白データを出力する。Next, the operation will be described. FIG. 2 is a flow chart showing a method of complementing uncorrectable data of a FAX broadcast receiver according to the present invention. First, the deinterleaved data packet is received, and the BEST method error correction process is performed (STP1). Depending on the number of error bits included in one data packet, the process branches into a case where the error can be corrected and a case where the error cannot be corrected (STP2). The case where error correction is possible will be described below. Correct data after error correction processing is stored in the memory unit (STP
3). The count value obtained by cumulatively counting the error correction impossible count is returned to 0 (STP4). Next, a case where error correction is impossible will be described. 1 is added to the cumulative count value of the number of times the error cannot be corrected (STP5). The value of the number of times the error cannot be corrected is, for example, 10
When the number of times exceeds the number of times and when the number of times exceeds the number of times, the process branches into two types (STP6). In the case of 10 times or less, the correct data after the error correction processing stored in the memory section immediately before is output instead of the data that cannot be error corrected (STP8).
In the case of 10 times or more, correct data cannot be obtained for a long period of time, and it is considered that the degree of image correlation is low, so a fixed value such as blank data is output.
【０００８】[0008]
【発明の効果】画像の相関を利用し、復号化前の圧縮さ
れているデータを用いて補完するので、違和感の少ない
補完ができると共に、メモリの容量が最小で済む。従っ
て、廉価な装置が実現できる。EFFECTS OF THE INVENTION Since the image correlation is used and the compressed data before decoding is used for the complement, the complement can be complemented with less discomfort and the memory capacity can be minimized. Therefore, an inexpensive device can be realized.
【図１】図１は、本発明によるＦＡＸ放送受信機の受画
部にあって補完を実施する部分のシステムブロック図で
ある。FIG. 1 is a system block diagram of a portion in a picture receiving unit of a FAX broadcast receiver according to the present invention, which implements complement.
【図２】図２は、本発明によるＦＡＸ放送受信機の誤り
訂正不能データの補完方法を示すフローチャートであ
る。FIG. 2 is a flowchart showing a method of complementing error correction uncorrectable data of a FAX broadcast receiver according to the present invention.
１ データパケットの取り込み部 ２ 誤り訂正部 ３ メモリ部 ４ 画像出力部 ５ 制御部 ６ インターリーブ解除後のデータパケット 1 data packet capturing unit 2 error correction unit 3 memory unit 4 image output unit 5 control unit 6 data packet after deinterleaving
Claims (1)
ーブを解除した信号を受け取る信号取り込み部と、ＢＥ
ＳＴ方式による伝送誤り訂正部と、訂正後の正しいデー
タパケットを記憶するメモリ部と、訂正後の正しいデー
タパケットおよび、記憶した以前のデータ等の画像デー
タを出力する画像出力部と、各部を制御する制御部とで
なり、前記訂正部より誤り訂正不能を示す信号を得た場
合には、記憶した直前のデータを出力することを特徴と
したＦＡＸ放送受信機の誤り訂正不能データの補完方
法。1. A FAX broadcasting receiver, a signal receiving unit for receiving a deinterleaved signal, and a BE.
A transmission error correction unit according to the ST system, a memory unit that stores correct data packets after correction, an image output unit that outputs correct data packets after correction, and image data such as stored previous data, and controls each unit The method of complementing error correction uncorrectable data of a FAX broadcast receiver, characterized in that, when a signal indicating that error correction is impossible is obtained from the correction unit, the immediately preceding stored data is output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3336826A JPH05176099A (en) | 1991-12-19 | 1991-12-19 | Interpolating method for error correction incapable data for fax broadcast receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3336826A JPH05176099A (en) | 1991-12-19 | 1991-12-19 | Interpolating method for error correction incapable data for fax broadcast receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05176099A true JPH05176099A (en) | 1993-07-13 |
Family
ID=18303030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3336826A Pending JPH05176099A (en) | 1991-12-19 | 1991-12-19 | Interpolating method for error correction incapable data for fax broadcast receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05176099A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4442426A1 (en) * | 1993-11-29 | 1995-06-01 | Kokusai Electric Co Ltd | Transmitting digital input image data |
| JPH08214104A (en) * | 1995-02-02 | 1996-08-20 | Olympus Optical Co Ltd | Information reproduction system |
| US6278734B1 (en) * | 1995-07-06 | 2001-08-21 | Siemens Aktiengesellschaft | Process for decoding and coding a compressed video data stream with reduced memory requirements |
-
1991
- 1991-12-19 JP JP3336826A patent/JPH05176099A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4442426A1 (en) * | 1993-11-29 | 1995-06-01 | Kokusai Electric Co Ltd | Transmitting digital input image data |
| DE4442426C2 (en) * | 1993-11-29 | 2001-02-15 | Kokusai Electric Co Ltd | Method and device for transmitting image data |
| JPH08214104A (en) * | 1995-02-02 | 1996-08-20 | Olympus Optical Co Ltd | Information reproduction system |
| US6278734B1 (en) * | 1995-07-06 | 2001-08-21 | Siemens Aktiengesellschaft | Process for decoding and coding a compressed video data stream with reduced memory requirements |
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