JPH02243085A - Still picture video image transmitter - Google Patents

Abstract

PURPOSE:To obtain sharp character information even without preparation of a conversion function to an opposite station by adding character information such as a numeral or a symbol inputted by a dial key of a telephone set to picture information picked up by a camera and sending the resulting information to a transmission line. CONSTITUTION:A dial signal received by a dial signal detection section 16 is converted into character information such as a numeral or a symbol and stored in a character information storage section 17. Moreover, when a dial key of a telephone set 11 is depressed, plural sets of character information are stored to the storage section 17 in the entered order. On the other hand, a picture storage control section 4 reads the character information stored in the storage section 17 and a character pattern generating section 18 reads the character pattern corresponding to the read character information and stored overlappingly on the picture data stored in the picture memory 5. Thus, the character information by the dial key of the telephone set 11 is overlapped on the video image picked up by the camera 1 in the display on the pattern of the video display device 2.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention has a camera to which a telephone is connected, a video display for photographing images, and a screen/memory for storing images. The present invention relates to a still image video transmission device having a function of transmitting a still image signal as a still image signal to a transmission line such as a subscriber telephone line, and displaying the still image signal received from the transmission line on a video display.

[Conventional technology]

Conventionally, there is a still image video transmission apparatus of this type configured as shown in FIG. This is because analog image data received from the camera 1 is stored in the image memory 5 by the image storage control section 4. and,
The image data stored in the image memory 5 is stored in the image storage control section 4.
The image is read out from the image memory 5 and output to the video display 2, and the image taken by the camera 1 is displayed on the screen.

Furthermore, when the caller presses the transmission switch of the key switch 9, the image storage control unit 4 detects this and starts the still image transmission process, reads out the image data to be transmitted from the image memory 5, and then reads the image data to be transmitted from the image memory 5. Give to 6. The image transmission control section 6 consists of a transmission/reception control section/modulation section 12, a demodulation section 13, and an A/D conversion section 14, and transmits the image data accumulated in the image memory 5 as a still image signal. /Modulation section 1
It is transmitted to the subscriber telephone line 10 via the 2° line switching section T. Further, by receiving image data from the subscriber telephone line 10 as a still image signal through the demodulating section 13 and the A/D converting section 14, the image data is stored in the image memory 5 by the image storage control section 4, and then, This image data is displayed on the video display 2 as a still image. Note that the line switching unit 7 is for switching between the subscriber telephone line 10 and the telephone 11.
1 is used for selecting a partner station and for voice communication.

[Problem to be solved by the invention]

In this way, in the conventional still image video transmission device described above,
The still image signal sent to the transmission line such as the subscriber telephone line 10 is obtained only from the video signal photographed by the built-in camera 1, and the telephone 11 connected to the still image video telephone on the main body of the device is It is only used for selecting the partner station (dialing) and for voice calls. For this reason, when an inexpensive low-resolution camera is used, a video signal of a person, etc. can be displayed on a video display to provide an image that is sufficiently distinguishable by humans, but text information is not included. A video signal obtained by photographing a document or the like cannot provide an image that would allow the characters written on the document to be identified when displayed on a video display. For this reason, when a video signal captured by one camera is displayed as a still image signal on the video display of the other station via a transmission line such as a subscriber telephone line, text information cannot be accurately transmitted. There is.

[Means to solve the problem]

In order to solve these problems, the still image video transmission device of the present invention includes a dial signal detection section for detecting a dial signal generated by pressing the dial key of a telephone, and a connection between the telephone. a connection switching unit for switching between a transmission line such as a telephone line and a dial signal detection unit; a character information storage unit for storing character information of a dial key detected by the dial signal detection unit; and this character information storage unit. The apparatus includes a character pattern generation section for generating a graphic character pattern corresponding to character information stored in the computer.

[Effect]

Therefore, in the present invention, it becomes possible to add character information such as numbers and symbols entered using the dial keys of a telephone to image information photographed by a camera, and to send the information to a transmission line such as a subscriber telephone line. Embodiments Next, the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a still image video transmission device according to the present invention. In FIG. 1, 1 is a camera for photographing a person, etc. and obtaining an image signal, and 2 is an image memory 5.
A video display 3 is used to display image data stored in the camera 1, and an A/D converter 3 is used to convert analog image signals obtained from the camera 1 into digital image data. 4 is an image storage control unit that controls the storage/reading of image data obtained from the camera 1) and image data received from the subscriber telephone line 10 into the image memory 5; 5 is a screen memory for storing image data; image memory,
6 is an image transmission control unit that controls the transmission of the image data stored in the image memory 5 to the subscriber telephone line 10 and the reception of the image data from the subscriber telephone line 10;
Transmission and reception control section/modulation section 12 and demodulation section 13 and A/
It consists of a D conversion section 14. Reference numeral 7 denotes a line connection switching unit that switches and controls the connection with the subscriber telephone line 10 between the telephone set 11 and the image transmission control unit 6.

Reference numeral 15 denotes a connection switching unit for switching the connection of the telephone 11 between the subscriber telephone line 10 and the dial signal detection unit 16;
The system detects dial signals received from the terminal and converts the received dial signals into character data such as numbers and symbols.

1γ is a character information storage unit for storing a plurality of character data output from this dial signal detection unit 16, and 18 is a character information storage unit that generates a graphic character pattern corresponding to the character data stored in this character information storage unit 17. This is a character pattern generation part. Further, 8 is a switch that switches the image to be displayed, a switch that controls the start of image data transmission, a switch that controls the connection switching section 15, and a mode selection section for selecting various operation modes. A key switch 9 is connected to the mode selection section 8 . In FIG. 1, the same or equivalent parts as in FIG. 4 are designated by the same reference numerals.

Next, the operation of the configuration of the above embodiment will be explained. Here, analog image data received from the camera 1 is always converted into digital image data by the A/D converter 3 and stored in the image memory 5 by the image storage controller 4. The image displayed on the video display 2 is image data stored in the image memory 5.

First, by operating the key switch 9, the mode selection section 8 instructs the image storage control section 4 to switch the connection of the telephone 11 to the dial signal detection section 16. Then, the image storage control section 4 controls the connection switching section 15 to connect the telephone 11 and the dial signal detection section 16.

In this state, the telephone 11 side is placed in an off-hook state B (receiver is picked up) and the dial key of the telephone 11 is pressed. As a result, when the dial key of the telephone 11 is pressed, a dial pulse or a DTMF dial signal is sent out. This dial signal is detected by the dial signal detection section 16.
When received, it converts the dialing signal into textual information IaK, such as numbers or symbols. The character information converted by this dial signal detection section 16 is stored in the character information storage section 1T. Furthermore, by pressing the dial key of the telephone 11, a plurality of pieces of character information can be stored in the character information storage section 1T in the order in which they were input. Character information stored in can be deleted.

On the other hand, the image storage control section 4 reads the character information stored in the character information storage section 17, reads out a character pattern corresponding to the read character information from the character pattern generation section 18, and stores it in the image memory 5. The image data is stored over the existing image data.

Therefore, the display on the screen of the video display 2 is such that text information from the dial keys of the telephone 11 is superimposed on the video taken by the camera 1, and an example of the display is shown in FIG.

FIG. 2 shows a case where the display position of characters input using the dial keys of the telephone 11 is displayed in one line at the bottom of the screen 21 of the video display 2, and the displayed numbers (0 to 9
) is character information input using the dial keys of the telephone 11. Further, the character pattern output from the character pattern generation section 18 is of a 5x7 dot configuration. At this time, the position where the character pattern is stored in the image memory 5 is determined by the image storage control unit 4 depending on the position where the character information is displayed on the screen of the video display 2. The position where text information is displayed on the screen of the video display 2 is normally set to be displayed in K1 line at the bottom of the screen 21, and the display position and the size of the text display area can be adjusted by operating the key switch 9. Let's choose the best. The brightness of each pixel of this character pattern is the highest brightness (white; 16 gradations (0 to 15)
In the case of display, it is set to 15 gradations). In addition, when the display area on the screen of the video display device 2 for text information is set to the full screen, the display of the entire screen is set at the lowest brightness (black; 16 gradations (0 to 15
), the text information is displayed at maximum brightness (see Figure 3). From 6, subscriber telephone line 10
By transmitting to the other station, it becomes possible to transmit still image information and text information to the other station. At this time, since the text information is received by the other station as video data, the received text information can be confirmed by displaying the received video data as it is without any conversion.

Furthermore, the only characters that can be entered using the dial keys of the telephone 11 are the numbers O to 9 and symbols such as *, *, but these numbers and symbols can be combined (for example, [1→A,
($02 → B1...), it is now possible to input alpha-pella) (A-Z), etc., and the amount of character information that can be sent to the other party is greatly increased by the transmission line such as subscriber telephone line 10. can be increased to

〔Effect of the invention〕

As explained above, according to the still image video transmission device of the present invention, the following effects can be obtained.

(1) Character information can be entered using dial keys on a telephone, which solves the problem of not being able to obtain clear character information due to the use of inexpensive low-resolution cameras.

(2) Since the input character information is sent as video data to the other station through a transmission path such as the other party's subscriber telephone line, there is no need to make any changes to the video data communication procedure, and there is no need to make any special changes to the other station. Text information can be received without the need for a conversion function.

(3) By using the dial keys of a telephone as an input device for character information, character information can be input without the need for a separate input device such as a keyboard.

There are effects such as

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of a still image video transmission device according to the present invention, tR2 diagram and FIG.
The figure is a block diagram showing an example of a conventional still image video transmission device. 1...Camera, 2...Video display, 3...
A/D conversion unit, 4... Image storage control unit, 5... Self-image memory, 6... Image transmission control unit, T... Write/line switching unit, 8#--Mode selection unit , 9...key switch, 10...φ subscriber telephone line, 11...
Telephone, 12... fist/transmission, reception control section/modulation section, 13.
... Demodulation section, 14---A/D conversion section, 15---
・Connection switching unit, 16... dial signal detection unit,
1T...Character information storage section, 18...-Character pattern generation section. Patent issuer: NEC Corporation Shizuoka NEC Corporation

Claims (1)

[Claims] It is connected to a telephone, has a camera for taking images, a video display, and a screen memory for storing images, and transmits the video signal taken by the camera as a still image signal to a transmission line such as a subscriber telephone line. In a still image video transmission device having a function of displaying a still image signal received from the transmission path on a video display device, a dial signal detection unit for detecting a dial signal generated by pressing a dial key of a telephone; a connection switching unit that switches the connection of the telephone between a transmission line such as a subscriber telephone line and a dial signal detection unit; a character information storage unit that stores character information of a dial key detected by the dial signal detection unit; It is equipped with a character pattern generation section for generating a graphic character pattern corresponding to the character information stored in this character information storage section, and adds character information input using the dial keys of the telephone to image information taken by the camera. A still image video transmission device characterized in that the still image is transmitted to a transmission line such as a subscriber telephone line.