JPS59172891A - Still picture transmitter - Google Patents
Still picture transmitterInfo
- Publication number
- JPS59172891A JPS59172891A JP58047401A JP4740183A JPS59172891A JP S59172891 A JPS59172891 A JP S59172891A JP 58047401 A JP58047401 A JP 58047401A JP 4740183 A JP4740183 A JP 4740183A JP S59172891 A JPS59172891 A JP S59172891A
- Authority
- JP
- Japan
- Prior art keywords
- frame memory
- address
- still picture
- entire
- picture
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
Abstract
Description
【発明の詳細な説明】
発明の技術分野
本発明は静止画像伝送装置に係わり特に短時間で全体画
像を認識可能な画像伝送方式に関する。DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a still image transmission device, and particularly to an image transmission method that allows recognition of an entire image in a short time.
従来技術及び問題点
従来の静止画像伝送装置は、全画素を画面の左上から右
下に向って順に伝送しているため全画面を伝送するため
に音声回線利用の場合約３０〜６０秒もの時間がかかり
これたけの時間をまたなければ全体画像を認識できなか
った。従ってダム等の監視システムなどにおいて７画品
質の低下を許しても全体を早くみたいという要求に答え
られなかった。Prior Art and Problems Conventional still image transmission devices transmit all pixels sequentially from the upper left to the lower right of the screen, so it takes about 30 to 60 seconds to transmit the entire screen when using an audio line. The entire image could not be recognized until this amount of time had passed. Therefore, in monitoring systems for dams, etc., even if the image quality was allowed to deteriorate, it would not be possible to meet the demand for speeding up the overall process.
発明の、目的
本発明目的は静止ｉｉ！！ｉｌｌの伝送においておおま
かな全体画像を１秒程度の短時間に伝送し、その後全画
像を伝送することにより次第にその画面が精細になると
いう静止画像伝送方式を提供するにある。Purpose of the Invention The purpose of the present invention is stationary II! ! To provide a still image transmission system in which a rough overall image is transmitted in a short period of about 1 second during ill transmission, and the screen gradually becomes finer by transmitting the entire image thereafter.
発明の構成
本発明は静止画像データを記憶しているフレームメモリ
からの画像データ読出し順序を制御することにより、最
初に短時間でおおまかな全体画像を表示するとともに次
に精細な画像を伝送するようにしたものである。Structure of the Invention The present invention controls the order in which image data is read from a frame memory that stores still image data, so that first a rough overall image is displayed in a short time, and then a detailed image is transmitted. This is what I did.
この結果、ダム等の監視システムにおいて、全体画像を
まずみたいという要求に答えることが可能となった。As a result, it has become possible to meet the demand for seeing the entire image first in monitoring systems for dams, etc.
発明の実施例 以下本発明を実施例に基づいて、詳細に説明する。Examples of the invention The present invention will be described in detail below based on examples.
第１図に静止画像伝送装置のブロック図を示す。FIG. 1 shows a block diagram of a still image transmission device.
送信部５ＥＮＤでＴＶカメラ信号がアナログ・デジタル
変換部Ａ／Ｄでデジタルに変換されてフレームメモリ
（ＭＥＭＩ）へ記憶される。従来はこのフレームメモリ
ＭＥＭ１から順次画素データを呼出しＤＰＣＭ符合化を
行い変調器（ＭＯＤ）により変調して回線へ送出してい
た。受信部では復調器（ＤＥＭ）により復調した後ＤＰ
ＣＭ復号してフレームメモリＭＥＭ２へ記１征する。こ
のフレームメモリＭＥＭ２に記憶された内容は常時ビデ
オ信号発生部ＶＤＧに読み出されＤ／Ａ変換されモニタ
に表示されていた。The TV camera signal is converted to digital by the analog/digital converter A/D in the transmitter 5END and stored in the frame memory.
(MEMI). Conventionally, pixel data was sequentially retrieved from the frame memory MEM1, subjected to DPCM encoding, modulated by a modulator (MOD), and sent to the line. In the receiving section, the DP is demodulated by a demodulator (DEM).
The CM is decoded and written to the frame memory MEM2. The contents stored in this frame memory MEM2 were always read out to the video signal generating section VDG, converted into D/A, and displayed on the monitor.
一方本発明では、第２図に示す様に、ディスプレイ画面
すなわち、フレームメモリを複数のブロック例えば１６
Ｘ４６ドツトの大きさで区分し。On the other hand, in the present invention, as shown in FIG.
Classified by size of x46 dots.
各ブロックから１画素づつランダムに選択して。Randomly select one pixel from each block.
伝送する様にした。I set it to transmit.
従ってこの場合１６回の伝送で、１画面の画像伝送が完
了する。図において、各ブロック内の数字は伝送される
順番を示している。Therefore, in this case, the image transmission for one screen is completed after 16 transmissions. In the figure, the numbers within each block indicate the order of transmission.
第３回により、具体例を説明する。A specific example will be explained in Part 3.
図において、ＡＤＣｌ、ＡＤＣ２はアドレスカウンタ；
ＡＣＮＩ ＡＣＮ２はアドレス変換回路である。In the figure, ADCl and ADC2 are address counters;
ACNI ACN2 is an address conversion circuit.
動作について、説明すると、アドレス変換回路ＡＣ’Ｎ
Ｉ、ＡＣＮ２は制御回路ＣＯＮ Ｔ１ からの伝送回数
を示す制御イハ号に従って、アドレスカウンタＡＤＣＩ
、ＡＤＣ２からの“１６″おきに出入
力されるアドレスを、第８図に示す様に変換し。To explain the operation, address conversion circuit AC'N
I, ACN2 is the address counter ADCI according to the control number indicating the number of transmissions from the control circuit CON T1.
, the addresses inputted and outputted every "16" from the ADC 2 are converted as shown in FIG.
フレームメモリＭＥＭＩをアクセスし１画素情報を読み
出して伝送する。The frame memory MEMI is accessed, one pixel information is read out and transmitted.
本装置によれば１回の伝送量を１／６４とすると、まず
１程度度で全体のおおまかな画面が受信モニタに表示で
き、その後３０秒程度かけて次第に精細な画面が表われ
てくる。According to this device, if the amount of transmission at one time is 1/64, a rough image of the entire screen can be displayed on the receiving monitor in about 1 degree, and then a finer screen gradually appears over about 30 seconds.
発明の効果
本発明によれば解像度の低い大まかな静止画像として全
体画像の認識を受信側にて短時間で行うことができる。Effects of the Invention According to the present invention, the entire image can be recognized as a rough still image with low resolution in a short time on the receiving side.
第１図は、静止画像伝送装置の全体を示す図。
第２図は本発明の詳細な説明する図、第３図は本発明の
具体例を示す図である。
図中ＭＥＭ１はフレームメモリ、ＡＤＣＩ、ＡＤＣ２は
アドレスカウンタ＋’ ＡＣＮＩ’、ＡＣＮ２はアドレ
ス変換器である。FIG. 1 is a diagram showing the entire still image transmission device. FIG. 2 is a diagram explaining the present invention in detail, and FIG. 3 is a diagram showing a specific example of the present invention. In the figure, MEM1 is a frame memory, ADCI and ADC2 are address counters +'ACNI', and ACN2 is an address converter.
Claims (1)
、記憶した静止画像を回線を通して送受信する静止ｉｉ
！ｌｌ像伝送装置において、フレームメモリを複数のブ
ｌ」ツクに分割し、各ブロックから１画素づつ選択して
伝送するとともに、各プロ、７り内の画素の選択をラン
ダムに行なう様に゛アドレスカウンタ出力をアドレス変
換して、該フレームメモリをアクセスする様にしたこと
を特徴とする静止画像送装置。Still II, which stores still images from a TV camera in frame memory and sends and receives the stored still images through a line
! In an image transmission device, the frame memory is divided into a plurality of blocks, one pixel is selected from each block and transmitted, and each block is set to an address so that the pixels within the block are randomly selected. A still image sending device characterized in that the frame memory is accessed by converting a counter output into an address.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58047401A JPS59172891A (en) | 1983-03-22 | 1983-03-22 | Still picture transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58047401A JPS59172891A (en) | 1983-03-22 | 1983-03-22 | Still picture transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59172891A true JPS59172891A (en) | 1984-09-29 |
Family
ID=12774085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58047401A Pending JPS59172891A (en) | 1983-03-22 | 1983-03-22 | Still picture transmitter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59172891A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60256284A (en) * | 1984-06-01 | 1985-12-17 | Nippon Telegr & Teleph Corp <Ntt> | Animation picture transmission and reception system |
| JPS61220577A (en) * | 1985-03-27 | 1986-09-30 | Toshiba Corp | Method for transmitting and displaying picture |
| JPH03160880A (en) * | 1989-11-18 | 1991-07-10 | Nec Home Electron Ltd | Transmission system for dct-sq compressed still picture |
-
1983
- 1983-03-22 JP JP58047401A patent/JPS59172891A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60256284A (en) * | 1984-06-01 | 1985-12-17 | Nippon Telegr & Teleph Corp <Ntt> | Animation picture transmission and reception system |
| JPH0220197B2 (en) * | 1984-06-01 | 1990-05-08 | Nippon Telegraph & Telephone | |
| JPS61220577A (en) * | 1985-03-27 | 1986-09-30 | Toshiba Corp | Method for transmitting and displaying picture |
| JPH03160880A (en) * | 1989-11-18 | 1991-07-10 | Nec Home Electron Ltd | Transmission system for dct-sq compressed still picture |
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