JPH04207382A - Still image transmitting device - Google Patents

Abstract

PURPOSE:To facilitate the input of arbitrary graphics from the outside, the storage thereof and the transmission of the graphics together with video data by providing a graphic memory corresponding to the picture elements of an image memory which stores the arbitrary graphics and a video signal changeover device which changes over video signals with the output signal of the graphic memory. CONSTITUTION:This device contains the memory 12 for the graphics corresponding to the picture elements of the video memory 11. The circuit 15 which changes over the videos by the memory output of the graphics corresponding to the video memory 11 in order to change over the display of the videos superposed with the graphics and the videos not superposed with the graphics is added to this device. Namely, the memory 12 of the graphics corresponding to the picture elements of the video memory 11 operates to store the graphic data inputted in superposition on the videos on a signal transmission side and to transmit the graphic data together with the image data of the video memory 11. The graphic data displayed in superposition on the still images to be transmitted is added and transmitted in this way.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for transmitting still images using a telephone line.

[Conventional technology]

The conventional device sends data representing the cursor position as described in Japanese Patent Application Laid-Open No. 1-138868, and displays the cursor on the receiving side based on the address data.

[Problem to be solved by the invention]

The above-mentioned conventional technology transmits an address for displaying a cursor, but does not take into account the transmission of graphics, etc., and has the problem of not being able to transmit a large amount of address data.

The purpose of the present invention is to input an arbitrary figure from the outside, store it, and transmit it together with video data.Furthermore, after transmission, the figure can be switched and displayed on the television depending on whether or not it overlaps with the video signal. The purpose is to provide video signals without being damaged by graphic data.

[Means to solve the problem]

In order to achieve the above object, a memory for graphics corresponding to the pixels of the video memory is built-in.

In addition, in order to switch the display between images with overlapping figures and images without overlapping, a circuit is provided for switching the images based on the memory output of the figure corresponding to the image memory.

[Effect]

A graphic memory corresponding to a pixel of the video memory stores graphic data input superimposed on the video on the transmitting side, and operates to transmit the graphic data together with the image data of the image memory. As a result, the receiving side receives the graphic data together with the received image, so that the position or message that the sending side wants to pay special attention to is transmitted from the sending side to the receiving side.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG.

A video signal from the video signal input device 10 is input, and the image data stored in the transmitting side image memory 11 is modulated by the audio telephone line connection modulation/demodulation device 14 and output to the telephone line. On the receiving side, a modem device 24 for connecting a voice telephone line
The image is demodulated and stored in the image memory 21. Further, the graphic memory 12 corresponding to the pixels of the image memory is connected to the graphic input device 18.
Graphic data is input and stored. The stored graphic data is recombined by the control circuit 13, modulated by the voice telephone line connection modem 14, and sent to the telephone line. On the receiving side, the voice telephone line connection modem 24 demodulates the data, the control circuit 23 recombines the data,
It is stored in the graphic memory 22. Further, the video signal output switching device I5 operates based on the output data of the graphic memory 12, switches between the video signal and the graphic data signal, and outputs the signal to the television 51. On the receiving side, the video signal switching device 25 operates based on the received output data from the graphic memory 22, switches between the video signal and the graphic data signal, and outputs the signal to the television 52. Further, due to the graphic data read prohibition signal from the control circuit 13.23, the video signal output switching device 15.25 always outputs a one-inch video signal, which is a video signal without overlapping graphic data.

According to this embodiment, when transmitting a still image over a voice telephone line, graphic data can also be transmitted together, and the transmitting side can convey to the receiving side a position or message that requires special attention.

〔Effect of the invention〕

According to the present invention, it is possible to add and transmit graphic data to be displayed superimposed on a still image to be transmitted, so that the receiving side can understand the intention of the transmitting side.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of one embodiment of the present invention. 10... Video signal input device, 11... Sending side image memory, 12... Sending side graphic memory, 13... Sending side control circuit, 14... Sending side audio telephone line connection modulation/demodulation device, 15... Transmission side video signal output switching device, 18.
...Graphic input device, 21...Receiving side image memory, 22
. . . Receiving side graphic memory, 23 . . . Receiving side control circuit,
24... Receiving side voice telephone line connection modem device, 25
... Receiving side video signal switching device, 51... Transmitting side television, 52... Receiving side television 1 mouth

Claims (1)

[Claims] 1. In a still image transmission device consisting of an image memory that stores a video signal, a modulation/demodulation device that transmits the stored image data, and a control circuit that controls them, a device that corresponds to a pixel of the image memory that stores an arbitrary figure A still image transmission device comprising a graphic memory and a video signal switching device for switching a video signal using an output signal of the graphic memory.