WO1992017033A1

WO1992017033A1 - Device and method for displaying picture on screen of visual telephone

Info

Publication number: WO1992017033A1
Application number: PCT/JP1992/000274
Authority: WO
Inventors: Yasuhiro Kunimoto; Makoto Hasegawa; Naomasa Nishimura
Original assignee: Fujitsu Limited
Priority date: 1991-03-13
Filing date: 1992-03-06
Publication date: 1992-10-01

Abstract

A visual telephone capable of performing selectively one of three kinds of displays, i.e., a speaker display, a data display, and an external video display, and its displaying method. This visual telephone for displaying a picture inputted from an external video or an image pickup camera and for transmitting the picture signal to the part comprises a judging means, a displaying means, and a transmitting means. The judging means judges whether the display mode of the input picture from the external video or the camera is External Video Display mode, Speaker Display mode, or Data Display mode. The displaying means displays the input picture, keeping it intact, when the mode is External Video Display mode, and displays the input picture, reversing it horizontally, when the mode is Speaker Display mode, and displays the input picture, reversing it vertically, when the mode is Data Display mode. The transmitting means transmits the input picture to the device of the party, keeping it intact, when the mode is External Video Display mode, and transmits only the information on the predetermined region of the input picture, when the mode is Speaker Display mode, and transmits the information on the input picture vertically reversed when the mode is Data Display mode.

Description

Description Title of the invention Telephone surface display device and its display method

〔Technical field〕

The present invention provides a television telephone screen display device capable of displaying three types of surface displays, a speaker screen display of a television telephone device, a material surface display, and an external video screen display. And its display method.

(Background technology)

Conventional television telephone devices send and receive a caller's face image as a static image.

Also, as a communication method of a conventional television telephone device, a method of transmitting the above-described transmission S of the face image of the talker and the voice of the talker has been generally adopted. Telephone devices other than those described above include applications that mutually transmit motion planes.

As other TV telephone devices, for example, materials such as publications are placed in front of the camera of the TV telephone device, and an image of the material is transmitted, or a hiatable record is transmitted. It is convenient to transmit the image recorded in the camera and display it on the screen as an image on the other party's telephone device. The conventional television telephone device shown in FIG. 1 operates as follows.

1 in the figure indicates an AZD conversion circuit. 2 indicates a memory writing circuit. 3 indicates a code / decoder. 4 indicates the frame memory. Reference numeral 5 denotes an address scanning circuit. 6 shows a DZA conversion circuit. 7 indicates a display device. 8 indicates a CPU bus. 9 indicates a communication control unit. 10 indicates CPU.

The display mode detection switch (manual switch) 11 is one of the AZD conversion circuit 1 and the external video input or imaging power camera input (display of speaker's face or display of document). Connected by manually switching the switch. The A / D conversion circuit 1 converts both the input external video input signal and the imaging force camera input signal from an analog image signal to a digital surface image signal and sends it to the memory writing circuit 2. Output. The memory writing circuit 2 writes the digital image signal converted by the AZD conversion circuit 1 to the frame memory 4 under the control of the CPU 10. The address scan circuit 5 reads out a digital surface image signal from the frame memory 4 based on the display mode detected by the display mode detection switch 11. Then, the digital surface image signal is output to the DZA conversion circuit 6. The DZA conversion circuit 6 converts the digital surface image signal into an analog image signal and outputs it to the display device 7. Display 7 displays analog surface image signals on the screen. The video is displayed on the screen.

The encoder / decoder 3 encodes the digital image signal from the frame memory and outputs it to the communication control unit 9 via the CPU bus under the control of the CPU 10. The communication control unit 9 transmits the encoded data to the other party's TV telephone device via a line. In addition, encoded data from the other party's TV telephone device during a call is transmitted via the communication control unit 9 via the CPU bus 8 under the control of the CPU 10 via the communication control unit 9. The code is sent to the decoder 3. The code / decoder 3 decodes the coded digital image signal received from the communication control unit 9 and generates a frame image as a digital surface image signal. Write to file 4.

In the conventional television telephone device shown in FIG. 1, it is possible to display an input of an imaging power camera or an external video input.

If this is not the case, the following problems occur in the conventional TV telephone device when displaying three displays, the speaker display material display and the external video display.

First, in a conventional TV telephone device, an input signal for imaging is displayed in accordance with the horizontal size of the surface.

For this reason, in a conventional TV telephone device, when transmitting a face image of a speaker's face, an attempt is made to capture and display extra images other than the speaker's face. Therefore, there is a problem that the amount of extra digital data is enormous. Second, conventional TV telephones have their own If you want to display the face of the minute as a face image, instead of being displayed like a mirror on the face, if the face of the speaker moves to the right, the display face image will move to the left. There is a problem that it is difficult to adjust my image position.

Third, in the conventional TV telephone device, when transmitting the image of the material placed on the desk, the force camera for imaging the face of the speaker is folded downward to capture the material. Since the direction of the screen image is reversed on the screen of the other party's TV phone screen display, the purpose is to botherate the material that is facing forward to the speaker side. There is a problem that it must be placed on a desk.

(Disclosure of the Invention)

The present invention has been made in view of the above-described problems of the related art, and has a television telephone surface display apparatus and a display method for removing an extra horizontal image other than an image of a speaker in the case of speaker display. The primary purpose is to provide

Further, the present invention has a second object of displaying a face image of one's face on a screen like a mirror.

Further, the present invention provides a television capable of displaying a material in a normal forward direction on the surface of the other party's television telephone device even if the direction of the material when displaying the material is directed to the provider side. A third object is to provide a screen display device and a display method thereof.

The present invention uses speaker display on a television telephone device, external video A fourth object is to provide a television telephone surface display device and a display method capable of displaying materials in addition to the display.

In order to achieve the above-mentioned object, the present invention provides a television screen display device for displaying an image signal input from either an external video or an imaging camera and transmitting the image signal to a device on the other end. Detecting means for detecting that the input from the external video or imaging camera is either the external video display mode, the speaker display mode, or the material display mode; When the external video display mode is detected by the detection means, the plane image is displayed as it is, and the speaker display mode is detected. Display means for displaying the image by inverting the image left and right, and inverting the image upside down when the document display mode is detected, and the external video display If it detects that it is a mote When the image is transmitted to the other device as it is and the speaker display mode is detected, only the information in the predetermined area of the image is transmitted, and the document display mode is used. When this is detected, a television telephone screen display device is provided which has a transmission means for transmitting information obtained by inverting the plane image upside down.

0 [Brief description of drawings] Fig. 1 is a block diagram showing the configuration of a conventional TV phone screen display.

FIG. 2 is a block diagram showing the basic configuration of the television phone surface display device of the present invention.

FIG. 3 is a diagram showing the appearance of a television telephone surface display device for displaying a speaker, a material, and an external video according to the present invention;

FIG. 4 is a diagram showing a screen display in the speaker display mode in the TV phone screen display method of the present invention.

FIG. 5 is a diagram for explaining a surface image display in the speaker display mode of the present invention.

FIG. 6 is a diagram for explaining a surface image display in the material display mode of the present invention.

FIG. 7 is a view for explaining a surface image display in the external video display mode of the present invention,

FIG. 8 is a block diagram showing in detail the configuration of the television telephone screen display device of the present invention.

Fig. 9 is a block diagram showing the configuration of the encoder in detail, Fig. 10 is a time chart showing the operation of the encoder, and Fig. 11 is a block diagram showing the configuration of the decoder in detail. FIG. 12 is a time chart showing the operation of the decoder, FIG. 13 is a diagram showing a scanning method when data is written to the memory writing circuit, Figure 14 is a block diagram showing the configuration of the memory write circuit in detail.

FIG. 15 is a timing chart showing the operation of the memory write circuit.

FIG. 16 is a diagram showing a method of changing the scanning of the address scanning circuit of both devices on the own and the partner side.

Fig. 17 is a block diagram showing the configuration of the address scanning circuit in detail.

Fig. 18 is a short circuit diagram showing the operation of the address scanning circuit.

Fig. 19 is a diagram showing the method of changing the scanning of the address scanning circuit of the own device and the scanning of the encoder.

Fig. 20 is a block diagram showing the configuration of the code / decoder in detail.

[Best mode for carrying out the invention]

FIG. 2 shows the basic configuration of the TV screen display device of the present invention.

The display mode detection switch 1 1 1 detects whether the signal is the speaker display mode or the material display mode signal input from the imaging camera. The display mode detection switch 111 detects each display mode and notifies the CPU 100 via the CPU bus 800. The specific structure of the display mode detection switch 111 is shown in FIG. Details of the specific structure will be described later. The external video presence / absence detection circuit 20 determines the presence / absence of an external video input by detecting a synchronization signal included in an analog video signal from the external video input. The input switching switch 110 0 connects the input from the imaging camera to the AZD conversion circuit 100 if there is no external video signal based on the discrimination information of the external image presence detection circuit 20. To gun. In addition, the input switch 1 1 0 0 switches the input from the imaging power camera to the AZD conversion circuit 10 if there is an external video signal based on the discrimination information of the external video presence / absence detection circuit 20. 0, and connect the AZD conversion circuit 100 to the input from the external video signal; the AZD conversion circuit 100 connects the external video signal or analog video signal of the input analog. The analog image signal for imaging is converted to digital and output to the memory writing circuit 200. The memory write circuit 2000 converts the digital video into digital based on the display mode information (speaker display mode or material display mode) detected by the CPU 1000. Write signal to frame memory 400. The address scanning circuit 500 converts the digital image signal written in the frame memory 400 into a digital image signal based on the display mode information detected by the CPU 1000. Scan and read. If the display mode detected by the CPU 1000 is the external video display mode, the address scan circuit 500 scans from the frame memory 400 and reads it. Converts the output digital video signal to DZA Output to conversion circuit 105. The DZA conversion circuit 105 converts a digital video signal into an analog video signal and outputs the analog video signal to the display device 107. The display device 107 displays the analog video signal as an image. The code * decoder 300 reads out the digital video signal from the frame memory 400 under the control of the CPU 1000, encodes it, and encodes it into the CPU bus. Is output to the communication control unit 900 via the. The communication control unit 900 transmits the coded digital video signal to the other party's TV telephone screen display device under the control of the CPU 1000. The communication control unit 900 receives the coded digital video signal sent from the other party's television S-side display, and the CPU 1000 communicates. The digital image signal encoded by the control unit 900 is output to the encoder and decoder 300 via the CPU bus 800. The code * decoder 300 decodes the coded digital video signal and writes it to the frame memory 400. The address scan circuit 500 scans the digital video signal from the frame memory 400 based on the display mode information from the CPU 1000. Read. The D / A conversion circuit 105 converts the digital video signal read from the frame memory 400 into an analog video signal. The display device 107 displays the analog video signal as an image. Next, FIG. 3 shows the appearance of the television telephone screen display device. FIG. 3 (a) shows a case where the imaging camera 23 is capturing a speaker. The imaging camera 23 captures the speaker without bending the bent part of the imaging camera 23, so that the display mode detection switch 24 is turned on. Become.

Further, the video telephone terminal display device is provided with a video input terminal 27 for inputting an external video signal. Handset 21 is used by the speaker to make a voice call with the other party. FIG. 3 (b) shows a case where the imaging camera 23 is imaging the document 26. FIG. Imaging Camera 2 3 in the bent portion of the ⁹ 0 β by shooting by Ri article and this bending Ri folding display mode detection sweep rate Tsu Chi 2 4 is off state of the imaging for the Camera 2 3 Become.

Here, in the television screen display device and the display method of the present invention, a face image of the speaker's face is displayed like a mirror, and an extra image other than the image of the speaker's face is displayed. Is deleted and displayed vertically. Further, in the television surface display device and the display method of the present invention, an image obtained by rotating an imaged material by 180 ° for displaying the material is transmitted. In this regard, we will first explain the overall outline, and then explain the individual means of realization.

Fig. 4 shows the screen display in the speaker display mode of the TV phone screen display device in Fig. 3. (A) of Fig. 4 shows the screen display of a conventional TV phone screen display device. You. FIG. 4 (b) shows the screen display of the TV phone screen display device of the present invention. In FIG. 4 (b), reference numeral 601 denotes a display in which the image of the other party is vertically long, for example, the aspect ratio of the surface to the height is 2: 3. Reference numeral 600 in FIG. 4 (b) shows an image display of a vertically long speaker reduced and displayed in a window format. FIG. 4 (c) shows another screen display of the television telephone surface display device of the present invention. In FIG. 4 (c), reference numeral 602 denotes a window displaying a screen image of the other party in a vertically-long reduced size in a window format. Numeral 603 in Fig. 4 (c) denotes a window displaying the speaker's image in a vertically reduced size in a window format.

FIG. 5 shows an image display in the speaker display mode of the present invention. The screen display shown in Fig. 5 is displayed when there is no output from the external video presence / absence detection circuit 20 shown in Fig. 2 and the display mode detection switch 1 1 1 is on. It is. Fig. 5 shows the image data written in the frame memory 400 in Fig. 2 in the speaker display mode in the shaded area. An image obtained by thinning out only the portrait image 6005 is shown. In the image in Fig. 5, the address scanning circuit 500 thins out only the vertical plane image 655 by controlling the speaker display mode from the CPU 1000. Specify the rule area. The address scan circuit 400 is controlled by the CPU 1000 to control the frame specified by the frame memory 400. This is displayed by scanning only the inside of the green area and reading out the image signal.

FIG. 6 shows an image display in the material display mode of the present invention. Displayed when there is no output from the external video presence / absence detection circuit 20 shown in FIG. 2 and the display mode detection switch 11I is off. Fig. 6 shows the data display mode, and the address scan circuit 500 shown in Fig. 2 normally uses the image data 600 written in the frame memory 400. It is shown that scanning is performed in a direction opposite to the scanning direction and read out. The address scan circuit 500 scans the frame memory 400 in the reverse direction and reads out the video signal under the control of each display mode from the CPU 1000. As a result, the material is displayed in the forward direction on the television compressing surface display device of the other party. Fig. 7 shows a surface image display in the material display mode of the present invention. The surface display shown in Fig. 7 has an output from the external video presence / absence detection circuit 20 shown in Fig. 2 and is independent of the state of the display mode detection switch 1 1 1 Displayed when. Fig. 7 shows the external video display mode, and the surface scan data 607 written to the frame memory 400 in Fig. 2 is normally used by the address scan circuit. It is shown that scanning and reading are performed as it is. The address scanning circuit 500 converts the video signal read from the frame memory 400 into a DZA conversion circuit 600 or an encoder / decoder. Output to 300 By doing so, it is displayed on each display device.

Next, general operations of a memory write circuit, an address scan circuit, and the like will be described.

FIG. 8 shows in more detail FIG. 2 which shows the structure of the television talking surface display device of the present invention earlier. The display mode detection switch 1 1 1 is in the speaker display mode if the bent part of the imaging camera 23 is not bent as shown in FIG. If it is bent, it will be in document display mode. The display mode detection switch 1 11 outputs to the register 115 the display mode information indicating whether the display mode is the speaker display mode or the document display mode. The external video presence / absence detection circuit 20 detects the synchronizing signal included in the analog video signal from the external video input and determines the presence / absence of the external video signal input. The external video presence / absence detection circuit 20 outputs information indicating the presence or absence of the input of the external video signal to the register 115. The CPU 1000 grasps the current display mode by reading the display mode state from the register 115 via the CPU bus 800. The input switch 1 1 0 0 disconnects the AZD conversion circuit 100 from the imaging camera input if there is an external video input, and the external video input is controlled by the CPU 100 0. Connected. In addition, the input switching switch 110 connects the camera input for imaging and the AZD conversion circuit 100 under the control of the CPU 1000 if there is no external video input. Here, the operation at the time of memory writing will be described using a time chart showing the interlocking operation of the memory writing circuit of FIG. The memory writing circuit 200 captures the clock (a) of the oscillator 121 into the horizontal scanning counter 202. Horizontal scanning counter 202 is an oscillator

Count based on clock (a) in 1 2 1. The horizontal scanning counter 202 counts the clock of (a), and the clock (b) that captures the lower one bit change of the count to be scanned. Output to min generator 1 18. The horizontal scanning counter 202 resets the count based on the synchronizing signal from the vertical synchronizing signal separator 114, and the counter is reset to the 3-1 selector 113. Outputs the address information corresponding to the number. At the same time, the horizontal scan counter 202 gives a carry clock to the vertical scan counter 203 when a predetermined count value is reached. The vertical scanning counter 203 counts based on the carry clock of the horizontal scanning counter 202, and outputs the sync signal from the vertical sync signal separator 114. The more reset and counted address information is output to 3-1 selector 1 13. The timing generator 118 outputs the clock of (c) to the control circuit 119 and the FIFO register 201. _o FIF 0 (First In First First) The register 201 is supplied with the clock of (c) as an enable (EN) signal and a read signal of the (FIF0) register 201. FIFO register 2 0 1 outputs the digital video signal (d) read out at the rise of the clock in (c) to the frame memory 400. The control circuit 119 receives the output (.c) of the timing generation unit 118 and outputs a write signal (e) to the frame memory 400. The frame memory 400 writes the digital video signal (d) from the FIFO register 201 into the memory based on the input of the write signal (d).

The operation at the time of memory read will be described using a short circuit chart showing the operation of the address scan circuit of FIG. 18. The address scanning circuit 500 outputs the clock (a) of the oscillator 121 to the horizontal scanning counter 501. The horizontal scanning counter 501 counts based on the clock (a) of the oscillator 121. The horizontal scanning counter 501 receives the clock of (a) and times out the clock (f) that captures the change in the lower one bit of the count to be scanned. It is output to the ring generator 120. The horizontal scanning counter 501 outputs a carry clock of the vertical scanning counter 502 when a predetermined number, for example, 319 is counted. The vertical scanning counter 502 counts by the carry clock of the horizontal scanning power counter 502. The vertical scan counter 502 is given a predetermined amount of time from the carry clock from the horizontal scan counter 501, for example, when the count of 239 is performed, the horizontal scan The carry clock to counter 501 and simultaneously reset the count. Cut. The vertical scanning counter 502 resets the counter and simultaneously outputs the address information corresponding to the count in the vertical scanning to the 3-1 selector 113. I do. In addition, the horizontal scanning counter 501 receives the carry clock from the vertical scanning counter 502 and resets the horizontally scanned count. Then, the address information of the count is output to the 3-1 selector 1 13.水平 The horizontal scan counter 501 of the dress scan circuit 500 receives the output (a) of the oscillator 121 and captures a change in the lower one bit of the count to be scanned. The obtained clock (f) is output to the timing generation unit 120. The timing generation section 120 outputs the read signal of (g) to the control circuit 119. The control circuit 119 supplies the read signal of (g) to the frame memory 400 so that the digital signal stored in the frame memory 400 can be read. The image signal (h) is read and output to the DZA conversion circuit 105. The 0-to-8 conversion circuit 105 converts the digital video signal (h) from the frame memory 400 into an analog video signal and outputs it to the display device 107. Figure 9 shows the details of the configuration of the encoder 303 of the code decoder 300, and Fig. 10 explains the operation using a time chart showing the operation of the encoder. I do.

The oscillator 121 supplies the clock (a) to the AND circuit 144 and the arithmetic unit 144. Arithmetic unit 14 2 of encoder 30 3 sends control signal from CPU to register 1 4 Enter in 3. Register 144 Outputs enable signal (b) to arithmetic unit 144 based on the control signal from CPU. The arithmetic unit 144 gives the control circuit 119 a read request (c), that is, a request to read data. The control circuit 119 supplies the arithmetic unit 144 with a response signal (d) for confirming whether or not it is possible to read the read request (c) of the arithmetic unit 144. . The computing unit 144 receives the response signal (d) from the control circuit 119 and supplies the control circuit 119 with a read signal (e) for reading data from the frame memory. The control circuit 119 receives the read signal (e) from the computing unit 144 and immediately sends the read signal (e) to the frame memory. Further, the control circuit 119 inputs the clock (e) to the input buffer 114 and the clock (g) to the flip-flop 134. . The frame memory receives the read signal (e) of the control circuit 119, reads out the stored digital video signal (f), and sends it to the input buffer 140. Output. The input buffer 144 receives the input CLK signal (e) from the control circuit 119 and outputs the stored digital video signal (f) to the computing unit 144 . The computing unit 144 performs an address computation process on the digital video signal from the input / output unit 140. The arithmetic unit 144 sends the processed video data to the communication control unit via the CPU bus 800 under the control of the CPU, and outputs a signal (h) indicating that the processing has been completed. Flick Output to BUFLOB 1 3 4. The flip-flop 1334 outputs the clock (i) to one terminal of the AND circuit 144 according to the input signals (g) and (h). The AND circuit 145 comprises a clock (a) from the oscillator 121 and a clock (i) from the clock (i) from the flip-flop 134. Is output to the horizontal scanning counter 301 shown in FIG.

FIG. 11 shows the configuration of the decoder 304 of the codec decoder 300 in detail, and FIG. 12 shows the operation using a timing chart showing the operation of the decoder.

Memory 116 stores the video signal sent from the other party. The CPU 1000 reads the encoded digital video signal from the memory 116 and outputs it to the FIFO buffer of the decoder 304 and the * buffer 130. Further, the CPU 100 0 sends a control signal to the register 13 36 of the arithmetic unit 13 1 via the CPU node 800. The register 1336 receives the control signal from the CPU 1000 and outputs an enable (EN) signal (b) to the computing unit 1332. The FIFO buffer 130 receives the clock from the arithmetic unit 132, and if the buffer is empty, the EMPTY signal (c) is sent to the arithmetic unit 132. It is output. The FIFO buffer 130 receives the clock of the arithmetic unit 132 and outputs a full signal to the register 117 when the buffer is full. In the evening of the evening, it is confirmed that the buffer is full at the same time. Notify CPU 100000 via CPU bus 800. The CPU 1000 retrieves the information that the buffer 130 is full from the register 117, and if the buffer 130 is full, the FIF 0, * Stop outputting digital video encoded in buffer 130. If the CPU 130 is not full of the register 130 from the register 117, then the CPU coded into the FIF 0 buffer 130 if it is not full. Sends image data. Arithmetic unit 132 receives EMPTY signal (c) from FIF 0 buffer 130 and captures encoded digital video signal from FIFO buffer 130 . The arithmetic unit 1332 processes the received digital video signal, and outputs a data shift request signal (d) to the control circuit 119. The control circuit 119 receives the data write request signal from the arithmetic unit 132 and outputs a response signal (e) to the arithmetic unit 132. The arithmetic unit 1332 looks at the response signal (e) from the control circuit 1119, and if the data can be written to the frame memory 400, sends the write control signal (ί) to the frame memory 400. Output to control circuit 119 The control circuit 119 outputs the write control signal (ί) from the arithmetic unit 132 to the frame memory 400. The calculator 1332 outputs the processed data (g) to the control circuit 119 and outputs the data write signal (f) to the frame memory 400 at the same time as outputting the data write signal (f). Control circuit 1 19 goes to flip-flop 13 4 Frame memory 4 The clock (h) is output simultaneously with the output of the write control signal (f) of 00. The flip-flop 1334 receives the input of the clock (i) from the computing unit 1332 and the input of the clock (h) from the control circuit 1119. The lock (j) is output to the AND circuit 135. The AND circuit 135 receives the input of (j) of the flip-flop 1334 and the input of the clock (a) of the oscillator 121 to the horizontal scanning counter 301. Output clock (k) 0

Next, the display method of the TV phone screen display device that performs the three speaker display modes, the material display mode, and the external video display mode will be described. First embodiment

An example in which the writing circuit is controlled to perform the operation will be described.

FIG. 13 shows a method of changing the scan when writing data to the memory write circuit 200.

FIG. 14 shows in detail the configuration of the memory writing circuit for realizing a method of changing the scan when writing data to the memory writing circuit 200.

In the speaker display mode in Fig. 13, when the display (a) at the time of input is written to the memory writing circuit 200, horizontal scanning is performed in the opposite direction to normal horizontal scanning, and vertical scanning is performed from top to bottom. (B). Document display mode The display at the time of input (a) and the display at the time of input of the speaker display mode (a) are 180 because the material is oriented in the direction of the speaker. It is rotating. In the data display mode, when data is written to the memory writing circuit, horizontal scanning is performed in the reverse direction as in (b), and vertical scanning is performed from bottom to top. In the external video display mode, the input display (a) is scanned horizontally from left to right, and vertical scanning is performed from top to bottom (b). . In the three display modes, as shown in (c), data is read out by scanning the screen (b) at the time of writing the memory with an address scan circuit as usual.

Here, the screen when the screen is displayed according to the present invention has, for example, a fin line of 240 dots of 320 dots. In the following, it is assumed that the scanning of the screen will be described in this field area.

FIG. 14 illustrates a circuit configuration for implementing the scanning method of FIG. 13 in the memory writing circuit.

The horizontal scanning counter 202 is a 32 decimal counter that can be specified for uploading.

The horizontal scan counter 202 sets the count value to 319 when a reset signal is input to the PR (preset) terminal. The count value of the horizontal scanning counter 202 becomes 0 when a reset signal is input to the RST (reset) terminal. The horizontal scan counter 202 can be specified for up-down when the count is up. Input "1" to the UPZDO WN terminal, and input "0" to the UPZDO WN terminal when counting down. Carry is a carry and carry signal.

Carry sets the horizontal scan counter to 20 when the horizontal scan counter changes from 319 to 0 at the time of count-up, and the horizontal scan counter 20 at the count-down. Output when 2 changes from 0 to 3 19.

The vertical scanning counter 203 is a 240-digit counter that can be specified for uploading.

The vertical scanning counter 203 sets the count value to 239 when a preset signal is input to the PR (bliss, set) terminal. The count value of the vertical scanning counter 203 becomes 0 when a reset signal is input to the RST (reset) terminal. The up-counting of the vertical scanning counter 203 is performed by inputting `` 1 '' to the UP ZD OWN pin and counting down when the count is up. Input "0" to the UP ZD OWN terminal when

If the CPU 100 shown in FIG. 8 is in the speaker display mode by looking at the display mode information of the register 115, the horizontal scanning counter mode is executed via the CPU bus 800. Write "0" to the designated register 211, and write "1" to the vertical scan counter mode setting register 211.

When the vertical sync signal is input, the horizontal scan counter mode setting register 2 1 1 is set to the horizontal scan counter 2 Outputs "0" to the UPZDOWN terminal of 02, the NOT terminal of AND circuit 221, and the terminal of AND circuit 222. The horizontal scanning counter 202 receives a reset signal of "1" at the PR terminal. The horizontal scanning counter 202 has a count value of 319 to 318, 317

• Each time 0 and the vertical sync signal are input, the countdown is performed. The horizontal scanning counter 202 outputs a carry signal to the vertical scanning counter 303 when the count value changes from 0 to 319.

When a vertical sync signal is input, the vertical scanning counter mode designation register 2 12 is connected to the UP / DOWN terminal of the vertical scanning counter 203 and an AND circuit 2 2 3 The vertical scanning counter 203 receives the reset signal of "1" at the RST terminal of the vertical scanning counter 203. The vertical scanning force ゥThe counter value of the counter 203 becomes 0. The vertical scanning force The counter 203 receives a carry signal of the horizontal scanning counter 202 and changes its value from 0 to 1. · · · · Counts up to 239 and damages from the next scanning line are performed. Writing to the memory is performed.

Here, for example, the values of the horizontal scanning count shown above are set to 100 to 200 from 0 to 239, and the values of the vertical scanning force count are set to 0 to 319. By doing so, extra images can be deleted as shown in Fig. 5. If the CPU 100 shown in FIG. 8 is in the material display mode by looking at the display mode information of the register 115, the horizontal scanning counter mode is executed via the CPU bus 800. Write "0" to register 211 and specify "0" to register 2 in vertical scan mode. When there is a vertical synchronization signal input, horizontal scan count is performed. The register 2111 outputs “0” to the UPZDO WN terminal of the horizontal scanning counter 202, the NOT terminal of the AND circuit 221 and the terminal of the AND circuit 222. In the horizontal scanning counter 202, the reset signal of "1" is input to the PR terminal. The horizontal scanning counter 202 has a count value of 319 to 318, 317,... 0 and countdown every time the vertical synchronization signal is input. Is done. The horizontal scanning counter 202 outputs a carry signal to the vertical scanning counter 303 when the count value changes from 0 to 319. Also, when there is a vertical sync signal input, the vertical scanning counter mode designation register 212 is connected to the UPZDO WN terminal of the vertical scanning counter 203 and the AND circuit 223. Outputs "0" to NOT terminal and AND circuit 222 terminal. For vertical scanning power 203, a reset signal of "1" is input to the PR terminal. The vertical scanning counter 203 has a count value of 239. The vertical scanning counter 203 receives the carry signal of the horizontal scanning counter 202 and receives the input of the signal 239, and counts down to 23,8,0. It is. Thereafter, the same operation is repeated, and writing to one frame of frame memory is performed.

The CPU 1000 looks at the display mode information of the register 115, and if it is in the external video display mode, the horizontal scanning counter mode is set via the CPU bus 800. Write "1" to the register 211 and write "1" to the vertical scan counter mode setting register 212.

When the vertical sync signal is input, the horizontal scanning counter evening mode designation register 211 is connected to the UPZDOWN terminal of the horizontal scanning counter 202 and the NOT terminal of the AND circuit 222 and the AND circuit. "1-" is output to the terminal of 222. The reset signal of "1" is input to the RST terminal of the horizontal scanning counter 202. The horizontal scanning counter 202 is The count value is incremented every time the vertical synchronization signal is input from 0 to 1, 2, ..., 3 19. The horizontal scanning counter 202 is When the count value changes from 319 to 0, a carry signal is output to the vertical scanning counter 303.

Also, when a vertical sync signal is input, the vertical scanning counter mode designation register 2 1 2 is connected to the UPZDOWN terminal of the vertical scanning power supply 2 0 3 and the NOT terminal of the AND circuit 2 2 3 And "1" is output to the terminal of AND circuit 222. The reset signal of "1" is input to the RST pin of the vertical scanning counter 203. The count value becomes 0 for the vertical scanning force 2003. Vertical scanning force The counter 203 receives the input of the carry signal of the horizontal scanning counter 202, counts up from 0 to 1 ... 23 9 and the next scanning line. Is written from the server. Thereafter, the same operation is repeated, and writing to one side of frame memory is performed.

As described above, the surface image signal written in the frame memory is transmitted to the speaker display mode in the speaker display mode by the operation of the scan circuit or the code / decoder described above. displays the person's face in the jar good of鎵, is displayed in the case of document display mode article cormorants I was 1 8 0 ⁰ rotation, the case of an external bi-de-O display mode, displayed on the Ri normal communication Is done. Second embodiment

Next, according to the television telephone surface display device and the display method of the present invention, a surface image signal to be displayed like a mirror is transmitted to the other party, but at the same time, the display mode is the speaker display mode. Notification is sent to the other party, and scanning is performed in the opposite direction when displaying, so that normal display can be performed.

Hereinafter, a specific way of doing the above will be described.

FIG. 16 shows a method of changing the scanning of the address scanning circuits of both devices on the other end.

FIG. 17 shows the configuration of the address scanning circuit 500 in detail.

The speaker display mode in Fig. 16 is the display at the time of input (a) (B) shows the normal horizontal scanning from left to right and vertical scanning from top to bottom when writing to memory write 200. Since the address scanning circuit 500 is in the speaker display mode, it performs normal horizontal scanning from left to right and vertical scanning from top to bottom (c>). The display screen (d) of the TV phone screen display device is displayed symmetrically to the display at the time of input.

In the material display mode, the display at the time of input (a) and the display at the time of input of the speaker display mode (a) are 180 because the display at the time of input (a) faces the speaker. It is rotating. In the data display mode, when data is harmed to the memory writing circuit, horizontal scanning is normally performed from left to right as in (b), and vertical scanning is performed from top to bottom. The scanning by the address scanning circuit performs horizontal scanning from right to left and vertical scanning from bottom to top (c). Display surface side of the T V phone plane surface display device JiSo S (d) is that is displayed in the display and 1 8 0 ⁰ rotated form of input. In the case of the external video display mode, the display at the time of input (a) is horizontally scanned from left to right, and the vertical scan is performed from top to bottom (b). The scanning in the address scanning circuit is shown as a normal horizontal scanning from left to right and a vertical scanning from top to bottom (c). The display screen (d) of the videophone screen display device of the own device is the same as the display at the time of input. The scan to decode the code with the code 'decoder' is shown in (d). FIG. 17 illustrates a circuit configuration for realizing an address scanning circuit by the scanning method of FIG.

The horizontal scanning counter 501 is a 32 decimal counter capable of specifying the count up.

When a preset signal is input to the PR terminal of the horizontal scanning counter 501, the count value becomes 319. The horizontal scanning counter 501 changes its count value to 0 when a reset signal is input to the RST pin. The horizontal scanning power counter 501 is set to enter “1” when the count is abbreviated and “0” when the count is down. . Carry is a carry signal and a carry signal.When the count-up occurs, the horizontal scanning counter 501 changes from 319 to 0, and when the count-down occurs. A signal is output when the horizontal scanning counter 5101 changes from 0 to 319.

The vertical scanning counter 502 is a 240-digit counter capable of specifying the count up.

When a reset signal is input to the PR terminal, the count value of the vertical scanning counter 502 becomes 239. The count value of the vertical scanning counter 502 becomes 0 when a reset signal is input to the RST pin. To specify the vertical scanning power up / down at 502, enter "1" when abbreviating the count and enter "0" when downing the count. I do. Carry is a carry signal, a carry signal, and vertical scan at count-up. Output when the counter 502 changes from 239 to 0, and when the counter is down, when the vertical scanning counter 502 changes from 0 to 2339. It is.

If the CPU 1000 shown in Fig. 8 is in the material display mode by looking at the display mode information in the register 115, it must be in the material display mode on the transmission partner side. Is notified via the communication control unit 900. At the same time, the CPU 1000 injects “0” into the horizontal scan count mode register 511 via the CPU node 800 to cause the vertical scan count to drop. Write "0" to the register register. The horizontal scanning counter mode setting register 5111 is connected to the UPZDOWN terminal of the horizontal scanning counter 501, the NOT terminal of the AND circuit 521, and the terminal of the AND circuit 522 by "0". Is output. The horizontal scanning counter 501 inputs a reset signal of "1" to the PR terminal. The horizontal scanning counter 501 has a count value of 319 as an initial state. The horizontal scanning counter 501 has a count value of 319 to 318, 317, 0, and 0 each time image data is read out. It is downed. The horizontal scanning counter 501 outputs Carry to the vertical scanning counter 502 when the power point value changes from 0 to 319. The vertical scanning counter mode designation register 512 is connected to the UP / DOWN terminals of the vertical scanning force counter 502, the NOT terminal of the AND circuit 523, and the AND terminal of the AND circuit 5234. "0 The vertical scanning counter 502 receives the reset signal of "1" at the PR terminal. The vertical scanning counter 502 is initialized as a counter. The vertical scanning counter 50 2 counts down from 23 9 to 23 8 ··· 0, and from the next scanning line. The same operation is repeated, and when reading from one side of frame memory is completed, the vertical scanning counter 502 starts reading. Carry is output to return to the initial state, and the other device displays the same.

If the CPU 1000 shown in FIG. 8 is in the speaker display mode by looking at the display mode information of the register 115, the CPU 1000 will be connected to the horizontal via the CPU bus 800. "0" is written to the scan counter mode designation register 511 and "1" is harmed to the vertical scan counter mode designation register 512. The horizontal scanning counter mode designation register 511 outputs "0" to the UPZDOWN terminal of the horizontal scanning counter 501, the NOT terminal of the AND circuit 521, and the terminal of the AND circuit 522. . In the horizontal scanning counter 501, a reset signal of "1" is input to the PR terminal. The horizontal scanning counter 501 has a count value of 319 as an initial state. The horizontal scanning force counter 501 has a count value from 319 to 318, and the force counts down every time the surface image data is read out. It is. Horizontal scanning counter 501 is force When the count value changes from 0 to 319, Carry outputs to the vertical scanning counter 502. In addition, the vertical scanning counter mode designation register 512 is connected to the UPDOWN terminal of the vertical scanning force counter 502, the NOT terminal of the AND circuit 523, and the terminal of the AND circuit 5224. "1

The reset signal of "1" is input to the RST terminal of the vertical scanning counter 502. The vertical scanning counter 502 is initialized as a counter. The count value becomes 0. The vertical scanning counter 502 counts up from 0 to 1 ... 23 9 and reads from the next scanning line. After the same operation is repeated and reading from one frame of frame memory is completed, the vertical scanning counter 502 and the carrier are reset. Is output to return to the initial state, and the other party's device g performs the same display.

In addition, in the case of the external video display mode, the display is performed as in the conventional case. Third embodiment

Fig. 19 shows the method of changing the scanning of the address scan circuit and the scanning of the encoder of the own device.

In the speaker display mode in Fig. 19, when the display (a) at the time of input is written to memory, normal horizontal scanning from left to right and vertical scanning from top to bottom are performed when writing to memory 200 Show (b). Address scan circuit 500 Since the encoder 300 is in the speaker display mode, the horizontal scanning from right to left and the vertical scanning from top to bottom are performed in the opposite direction (c). In the document display mode, the display (a) at the time of input is turned 180 ° with respect to the display (a) at the time of input of the speaker display mode because the display (a) at the time of input faces the speaker. In the data display mode, when writing data to the memory writing circuit 200, horizontal scanning is normally performed from left to right as in (b), and vertical scanning is performed from top to bottom. The scanning by the address scanning circuit 500 and the encoder 300 performs horizontal scanning from right to left and vertical scanning from bottom to top (c). In the case of the external video display mode, the display at the time of input (a) is horizontally scanned from left to right, and the vertical scan is performed from top to bottom (b). The scanning by the address scanning circuit 500 and the encoder 300 performs a normal horizontal scanning from left to right and a vertical scanning from top to bottom (c).

This is to change the scanning by the address scanning circuit 500 and the encoder 303 in FIG. The address scanning circuit realized in FIG. 19 is shown in FIG.

FIG. 20 shows a part of the configuration of the code / decoder in detail. C The operation of the code / decoder in FIG. 20 will be described.

The CPU sends information defining the scan area address to the horizontal scan designated area register via the CPU bus 800. 1 1 and outputs to the vertical scanning area designation register 3 13 3 The horizontal scanning area setting register 3 1 1 outputs the information of the specified address received from the CPU to the comparison circuit 3 1 2 You The horizontal scanning area designation register 313 outputs the information of the designated address received from the CPU to the comparison circuit 314. The horizontal scanning counter 301 receives the clock (j) from the encoder 303 shown in FIG. 9 and counts down or adds up. Outputs the signal to the 3-1 selector and comparison circuit 312. The comparison circuit 312 has an address from the horizontal scan area setting register 311 and an address from the horizontal scan counter 310 and a horizontal scan counter 30. If the address is compared with the address from 1 and they match, the match signal is input as a clock to the terminals of the vertical counter 302 and the OR circuit 315. The OR circuit 315 ORs the coincidence clock of the comparison circuit 321 and the signal from the sign / decoder, and if there is an input from one of the signals, the horizontal scanning counter 310 Outputs a reset signal or preset signal.

The horizontal scanning counter 301 is a 32 decimal counter capable of updating the count. The horizontal scanning counter 301 has a horizontal scanning counter 311 whose count value becomes 319 when a reset signal is input to the PR (Breset) terminal. 0 is 1 when the reset signal is input to the RST (reset) terminal, the count value becomes 0. Specify the horizontal scan counter 301 up-down Input "1" when counting up and "0" when counting down.

The vertical scanning counter 302 is a 240-digit counter that allows the counter to be specified for uploading. When a reset signal is input to the PR terminal of the vertical scanning counter 302, the count value becomes 239. The count value of the vertical scanning counter 302 becomes 0 when a reset signal is input to the RST pin. To specify the up / down of the vertical scanning counter 302, enter "1" when the count is up and enter "0" when the count is down. .

The CPU 1000 shown in FIG. 8 looks at the display mode information of the register 115, and if it is the speaker display mode, performs the control shown in the third embodiment on the address scanning circuit, and The CPU 1000 writes "0" to the horizontal scan counter mode designation register 331, and writes "0" to the vertical scan counter mode designation register 332 via the CPU bus. Write 1 ". The horizontal scanning counter mode designation register 331 sets "0" to the UPZDOWN terminal of the horizontal scanning counter 301, the NOT terminal of the AND circuit 321, and the terminal of the AND circuit 322. Output. At the time of the code / decoder initialization, the code is output. ■ A pulse is output from the decoder to initialize the horizontal scanning counter 301. The horizontal scanning counter 301 has a count value of 319 as an initial state. Horizontal scanning counter 3 0 1 is the counter value from 3 19 to 3 18, 3 1 7,

· · · Image data is read each time the countdown is performed. The horizontal scanning counter 301 is a comparator circuit 31 which compares the preset value of the horizontal scanning area designation register 311 with the count value actually counted. When the coincidence is detected, the preset signal is output to the horizontal scanning counter 301 and the vertical scanning counter 302 as well. The vertical scanning counter 302 has a count value of 0 as an initial state. The vertical scanning counter 302 is from 0 to 1, 2,

• · Counts up to 239 and reads from the next horizontal scan line. The vertical scanning counter 302 compares the value set in the vertical scanning area designation register 313 with the actual count value by a comparison circuit 314. If a match is detected, the encoding end signal is output from the comparison circuit 314, and the process returns to the initial state. Further, the other device displays the image signal, which has been coded left-right inverted and coded by normal scanning, left-right inverted.

The CPU 1000 shown in FIG. 8 looks at the display mode information of the register 115, and if it is in the material display mode, the address scanning circuit 500 has the third embodiment. In addition to the control shown in, the CPU 100 writes “0” to the horizontal scanning counter mode designation register 331 via the CPU bus * Vertical scan counter mode Write "0" to the decision register 332. The horizontal scanning counter mode designation register 331 sets "0" to the UPZDOWN terminal of the horizontal scanning counter 301, the NOT flexible element of the AND circuit 321, and the terminal of the AND terminal 3222. Output. When the code / decoder is initialized, a pulse for initializing the horizontal scanning counter 301 is output from the code / code decoder. The horizontal scanning counter 301 has a counter value of 319 as an initial state. Each time the horizontal counter 0 31 is counted down from 3 19 to 3 18, 3 17, Is read. The horizontal scanning counter 301 determines that the value of the preset horizontal scanning area designation register 311 matches the actual counting value in the comparison circuit 312. Is detected, the reset signal is output to the horizontal scanning counter 301 and to the vertical scanning counter 302. The vertical scanning counter 302 has a count value of 239 as an initial state. The vertical scan counter 302 counts down from 239 to 238 0 0 読み出 0, and reading is performed from the next horizontal scan line. The vertical scanning counter 302 detects the coincidence between the value set in the vertical scanning area designation register 313 and the actual count value by the comparison circuit 314. Then, an encoding end signal is output from the comparison circuit 314, and the state returns to the initial state. In addition, the device at the other end The inverted and coded image signal is decoded by normal scanning and displayed upside down.

According to the present invention, the memory writing circuit, the address scanning circuit, and the encoder described above delete and transmit an unnecessary image other than the face of the speaker in the speaker display mode. The image of the speaker can be displayed as an appropriate image without being displayed as a mirror on the user's own device. This has the effect of being able to be transmitted.

[Industrial applications]

The present invention relates to a television telephone surface display device and a display method thereof, and more particularly to a television telephone surface display device that performs three types of display, that is, speaker display, material display, and external video display. In recent years, this has led to the spread of low-cost high-speed circuits such as ISDN (Integrated Services Digital Network), the advancement of semiconductor technology, and the development of image compression technology. Along with this, a television telephone surface display device capable of making a telephone call while looking at the other party's face has been realized.

Such a television screen display device displays an image of the other party's face on the screen, and displays an external video signal on the other device's surface. External video display is possible Thus, the present application is an excellent device that can perform this display more effectively.

Claims

The scope of the claims

1. In a TV talk screen display device that displays an image signal input from an imaging camera and transmits it to the other device,

Detecting means for detecting that the input from the imaging camera is in the material display mode;

When the material display mode is detected by the detection means, the television screen surface is provided with display transmission means for inverting an image upside down and displaying and transmitting the display to a partner device. Display device.

2. In a TV phone screen display device that displays a screen image signal input from a camera for image display and transmits it to the device of the other party,

Means for detecting that the input from the imaging camera is in speaker display mode;

When the speaker display mode is detected by the detection means, a display means for displaying and transmitting the image by inverting the image left and right is provided. apparatus.

3. In the method of displaying the image signal input from the imaging camera and transmitting it to the other party's device,

The input from the camera is in speaker display mode Detecting means for detecting this;

When the detection means detects the speaker display mode, a transmission means for transmitting only a predetermined area of an image to a device on the other end is provided. Telephone screen display.

4. In a TV phone surface display device that displays an image signal input from either an external video or imaging camera and transmits it to the other device,

A detection means for detecting that an input from an external video or imaging camera is in an external video display mode, a speaker display mode, or a material display mode; If the external video display mode is detected, the image is displayed as it is, and if the speaker display mode is detected, Display means for inverting the display to the left and right, and inverting the image up and down when detecting that the document display mode is selected; and

When the external video display mode is detected, the plane image is transmitted to the device of the other party as it is, and the speaker display mode is detected. In addition, it has a transmission means for transmitting information in which only a predetermined area of a surface image is transmitted and transmitting the information obtained by inverting the surface image when detecting that the display mode is the material display mode. Telephone surface display device.

5. A videophone screen display method for displaying a plane image signal input from either an external video or an imaging camera and transmitting the image signal to a device of the other party.

Detects whether the input from the external video or imaging power camera is in external video display mode, speaker display mode, or material display mode,

If the external video display mode is detected by this detection, the image is transmitted to the other device as it is, and the speaker display mode is detected. When the document display mode is selected, the left and right sides of the plane image are displayed inverted, and only the specified area of the image is transmitted to the other device. A method for displaying a videophone screen, which is characterized in that the screen is transmitted to a device on the other side.

6. The display transmission means,

Memory means for storing the input image signal, and writing means for writing the image data by inverting the input image when the detecting means detects the material display mode. When,

Reading means for reading the written image signal from the storage means;

Display means for displaying the image signal read by the reading means;

Transmit the image signal written in the storage unit The television telephone surface display device according to claim 1, further comprising a transmission means.

7. The display transmission means,

Writing means for storing the input image signal; and writing to the storage means by inverting the input image left and right when the detection means detects the speaker display mode. Means and

Reading means for reading the written signal from the storage means;

Display means for displaying the surface image signal read by the reading means;

3. The television telephone surface display device according to claim 2, further comprising a transmission unit that transmits the image signal written in the storage unit.

8. The transmission means,

Storage means for storing input image signals;

Writing means for extracting only a predetermined area of a surface image and writing the same in the storage means when the detection means detects the speaker display mode;

4. The television telephone surface display device according to claim 3, further comprising: transmission means for transmitting the image signal written in said storage means to a partner device.

9. The display transmission means, Memory means for storing an input image signal; writing means for writing an input image signal to the storage means;

Reading means for reading the harmed image signal from the storage means in up and down and left and right directions when the detecting means is detecting the material display mode; and A display means for displaying the read image signal;

2. The television telephone surface according to claim 1, further comprising a transmission unit configured to transmit a surface image signal impaired in the storage unit and a control signal indicating that the display mode is the material display mode. Surface display concealment.

1 0. The display transmission means,

Storage means for storing an input image signal; writing means for causing the input surface image signal to be damaged in the storage means;

Reading means for reading the written image signal from the storage means in the left and right directions in a reverse direction when the detection means detects the speaker display mode;

Display means for displaying an image signal read by the reading means;

3. The television according to claim 2, further comprising a transmission unit configured to transmit an image signal written in the storage unit and a control signal indicating a speaker display mode. B-phone surface display device.

1 1. The transmission means:

Memory means for storing an input image signal; writing means for writing an input image signal to the memory means;

3. The apparatus according to claim 2, further comprising a transmission unit configured to transmit only an image signal in a predetermined area from the storage unit to a partner device when the detection unit detects the speaker display mode. Telephone screen display.

12. The display means,

A storage means for storing the input image signal; and, when the detection means detects the material display mode, the input image is inverted upside down and written in the storage means. Writing means for inverting left and right of a plane image to be input and writing in the above-mentioned memory means when the detection means detects the speaker display mode;

Reading means for reading the written surface image signal from the storage means;

5. The television telephone screen display device according to claim 4, further comprising display means for displaying an image signal read by said reading means.

1 3. The display means, Memory means for storing an input image signal; writing means for writing the input image signal to the memory means;

When the detecting means is detecting the material display mode, the written surface image signal is read out from the storage means in up, down, left and right directions, and the detecting means displays the speaker. Reading means for reading out the written image signal from the storage means in the right and left directions when the mode is detected;

Display means for displaying the image signal read by the read means,

The transmission means,

Transmitting means for reading out the written image signal from the storage means in the vertical and horizontal directions in the reverse direction and transmitting the read image signal to the partner apparatus when the detecting means is detecting the material display mode; 5. The television telephone surface display device according to claim 4, wherein the display has a special feature. ,

1 4. The transmission means, when the detection means detects the material display mode, the image signal and the processing material table read out in the order written from the storage means. 5. The television telephone surface display device according to claim 4, further comprising a transmission means for transmitting a control signal indicating that the display mode is the display mode.