JPS61117963A - Ducument transmission device - Google Patents

Abstract

PURPOSE:To obtain a device responsive to fast conversation such as a TV conference by transmitting a document in a short time through a narrow band transmission line, displaying the document roughly once to display the outline of throughs or a graph required for explanation and switching the display sequentially into a high definition picture display succeedingly. CONSTITUTION:In transmitting the image of information in a temporary memory 2 to the reception side at first while an average contrast in the unit of, e.g., 1mm<2> is converted to logical level 1/0, the image is stored in a memory 13 while being restored to a normal pattern via a receiver 9 and a signal converter 11, and stored in a high-speed read memory 13' while the input 1 dot is used as dot information of 8X8=64. The said picture information is read by a high-speed scanner 14 in a scanning line speed of a television picture and displayed on a high definition projector as a rough graph. Then a control device 5 at the transmission side transis to high- definition scanning and the information is transmitted in the normal mode. In receiving the information, a rough/normal information receiver 10 switched the temporary memory 13 and rewrites the memory 13' into new information sequentially. Since a high speed scanner 14 applies scanning as a TV picture even during this time, the picture in the high definition projector 15 is replaced in the picture sequentially from the rough mode to the high definition mode.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention transmits high-definition images via a narrowband transmission line.
This is related to a calligraphy and drawing transmission device that reduces the transmission time and sequentially switches the display of rough images to high-definition images in TV lectures and TV conferences using TV images that are displayed on an image projector on the receiving side. It is.

Conventional configuration and its problems General 17c A4 size detailed drawings and detailed documents can be faxed.
To send the signal to a remote receiving end using the K and display it on a large video projector, a broadband (several MHz) transmission line is required, and it is uneconomical to leave it in use all the time. In addition, it takes a considerable amount of time to send the above-mentioned high-precision images over a narrowband transmission path such as a telephone line, and the receiving side, which uses this for immediate purposes such as TV lectures, is unable to wait. There were some drawbacks that made me feel dissatisfied.

OBJECT OF THE INVENTION The present invention is intended to eliminate the drawbacks of the above-mentioned conventional examples, and is a button for transmitting calligraphy and drawings in a short time through a narrowband transmission line and displaying them once in a rough manner, for use in TV programs, TV conferences, etc. In addition to conveying the outline of the ideas and figures necessary for the explanation to the receiver, this rough image is then sequentially switched to high-definition and displayed for TV lectures, TV conferences, etc. It is an object of the present invention to provide a document and image transmission device that can adapt to fast conversation.

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention includes a high-speed scanner for calligraphy, a temporary memory for storing the output from the high-speed scanner, a small area of black and white on the calligraphy as a digital signal, and a low-speed scanner that reads out a small area of black and white on the calligraphy as a rough signal. The receiving side memory is stored in
Then, the sending side sequentially sends at least a part of the screen based on the rough signal as a high-definition image signal to the receiving side, rewrites the rough signal into a high-definition image signal, and converts this into a high-definition image signal. The image is displayed on a high-definition image projector, and after giving the recipient an idea of how to understand documents and figures in a very short period of time, the image is switched to high-definition. This has the effect of providing a faster understanding of the subject.

DESCRIPTION OF EMBODIMENTS The structure of an embodiment of the present invention will be explained below with reference to the drawings.

In Fig. 81, 1 is a high-speed scanner that scans documents, graphics 20, etc. and outputs a high-definition television image signal, 2 is a temporary memory that stores the output of the high-speed scanner, and 3 is a storage address of the temporary memory. A normal reader reads data at the normal speed of FAX for narrow-bandwidth communication, and 4 is a rough reader that reads data from the storage memory in an irises representing a small area.The reading method will be described later.

6 is a control unit that controls the switch 6 etc. for rough transmission and normal transmission; 6 is a rough signal and normal signal switch; 7 is a rough/normal information transmitter that adds rough/norm information as a prefix signal; 8 is a fax machine used in narrowband (F
AX) transmitter, 21 is a narrowband transmission line such as a telephone line, 9 is a FAX receiver, 10 is a rough/normal information receiver, detects the rough/normal signal, and switches 12 and sends it to the memory 13 as a job-specific signal. 11
A signal converter converts a rough signal into a normal signal area signal, 13 is a temporary memory for the image signal of the FAX receiver, 13' is a high-speed read memory, and 14 is the memo! J
A high-speed scanner 13 and 13' reads out the memory information as a high-definition television video signal, and 16 is a high-definition projector for a high-definition television screen.

Next, the operation will be explained using FIGS. 1 to 3. First, to explain the normal mode, the high-speed scanner 1 detects differences in brightness and color of documents or various figures, for example, as brightness information of 8x8 (=64) points, and converts this signal into 1. The entire screen including the row frame signals is sequentially stored in the temporary memory 2. The normal reader 3 sequentially reads out the information in the temporary memory 1 at a narrowband FAX scanning speed (for example, 4.8xbtt) and reads out the information in the temporary memory 1 via a switch 6 controlled by a controller 6 and a rough/normal information transmitter 7. Add normal information as a prefix signal and fax
The transmitter 8 sends the signal to the receiving side via the narrowband transmission path 21. Now, if the area of a calligraphy or painting is 17 x 24 cm, the total area is approximately 2.6 Mbit, which can be expressed as 'A, a
If you send a fax using a Kbit7set, it will take approximately 9.1 minutes to send and receive the entire screen. When conducting televised lectures or teleconferences using these drawings, the explanations become redundant or the discussion becomes stagnant due to the image transmission of the drawings. Next, seven modes will be explained. For example, if the information in the temporary memory 1 is digitally converted with the average brightness of the area of 1-unit being 1 or Q and first sent to the receiving side, approximately 8.
A rough image can be displayed on the listening side in 6 seconds.

This information signal is transmitted via the FAX transmitter 8 and the transmission line 21 to the reception HK transmission 1FAX reception 591 switch 12. It is returned to the normal screen via the signal converter 11 and stored in the memory 13, where, for example, one input dot is converted into 8×8=64
The dot information is given to the high speed read memory 13'l'C and stored. This image information is read out by a high-speed scanner 14 at the scanning line speed of the television screen and displayed on a high-definition grozier. However, this figure shows an extremely rough shape. After completing the above-mentioned rough mode scanning, the control unit on the transmitting side shifts to high-definition scanning, transmits the normal signal sending information from the rough/normal information transmitter 7, and switches the switch 6 to the output 11 of the normal reader. The FIFAX transmitter 8 sends the data in normal mode. When the normal transmission information is received by the FAX receiver 10, the rough/normal information receiver 1o switches the temporary memory 13 to the normal mode, and the signal output of the FAX receiver 9 is transferred via the switch 12 to the temporary memory 13'. It is gradually replaced with new information. During this time, the high-speed scanner continues to scan as a TV image, so the images of the high-definition projector are sequentially replaced from rough mode images to high-definition mode images.

FIG. 2 is a diagram showing several examples of readers that obtain rough mode information from high-definition image information. In Figure 2, there is a method of digitally determining black and white as 1 or 0 using one point at the corner of an area of 1- or one point in the center (black and white) as a representative point, but if the number of points is even In this case, black and white determination can be easily made by adding 1 or -1 to obtain a majority vote. Figure 3 is a diagram of the sending and receiving of character prisoners, where I is the original character diagram, mouth h 1 m1a
FIG. 7 is an image reception diagram based on a rough signal based on black and white determination of the center point of the l angle. If a calligraphy image of A a (Wl 70X H240-) is sent at a and aKbits in area 1-position, the time required is 8.6 seconds, which is equivalent to one screen of a high-definition projector with a W170aIIIj aspect ratio of 3:6. The image sending time is 3.
It is 6 seconds. C is a received image divided into 1-t-4, and if the initial rough image is refined to 0-5111fflX0.51111, one screen can be sent in about 16 seconds, so
If this is followed by switching to a high-definition image and transmitting the image, it is effective to transmit the correct screen image more quickly.

The method described above (method @1) first sends a rough image, presents its outline to the recipient, and sequentially switches the display image to a high-definition image for display. By applying the above configuration to other methods, a second method is to send a rough image first, scroll the image of the part that particularly requires explanation and display it on the image projector, and give priority to the high 5ati from this part. The third method is to display one screen as 7 images, then surround the part you want to display in detail with a kernel, and then select that part. There is a method to rewrite the images to high-definition images in order.

Furthermore, as a combination of the first to third methods, it is possible to program a procedure in advance on the image sending side and the image receiving side, and automatically process the process based on the program.

Effects of the Invention As explained above, the present invention first transmits a rough image to give a rough image of characters or drawings to the recipient side, then transmits a high-definition image of a portion or the whole,
This has an advantage in transmitting a high-definition image in a narrow band by displaying it in place of the rough screen.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a calligraphy and picture transmission device according to an embodiment of the present invention, FIG. 2 is an explanatory diagram showing a rough signal extraction method, and FIG. 3 is an explanatory diagram of a character transmission diagram. 1...High speed scanner, 2...Temporary memory, 3...Normal reader, 4...Rough reader, 6...Reading Switching controller, j...
...Switcher, 7...Rough/normal information signal device, 8...FAX transmitter, 9...FA
X receiver, 1o... Rough/normal information receiver, 11... Signal converter, 12... Switcher, 13... Temporary memory, 13 ′・・・・・・
High-speed reading memory, 14...High-speed scanner, 16
...High-definition projector. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
figure

Claims (1)

[Claims] A signal obtained by sequentially scanning a document or figure is sent to the receiving side via a band-limited transmission line, and when this is displayed on a high-definition projector, the document or figure is scanned at high speed as an ultra-definition image. a high-speed scanner, a temporary memory for sequentially storing outputs of the high-speed scanner, and a document and a figure as data stored in the temporary memory as an information signal representing a small area on a predetermined figure;
a rough reader that reads the high-definition data from the temporary memory as a rough signal that can be transmitted by FAX over a narrowband transmission line; a normal reader that reads out at least a part of the high-definition data as a normal signal that can be transmitted by FAX; a switch that controls switching to high-definition data transmission after completion of transmission of the rough signal; a rough/normal information transmitter that transmits an identification signal to distinguish the type of data when transmitting the data; and a rough/normal information transmitter that transmits the various signals. A FAX transmitter that sends a FAX signal to a narrowband transmission path, a FAX receiver that receives the FAX signal, and a rough/normal information receiver that distinguishes whether a subsequent signal is a rough signal or a high-definition signal using the identification signal. In the case of a rough signal, it is stored in a temporary memory that stores high-definition signals as surface data of a predetermined small area via a signal converter, and for high-definition data, instead of being stored as surface data, a switch for sequentially rewriting at least a part of the data stored in the area as row storage data; a high-speed scanner for reading out the contents of the temporary memory as a TV image signal; and a high-speed scanner for reading out the contents of the temporary memory as a TV image signal; A calligraphy and drawing transmission device consisting of a high-definition projector for display or normal display.