JPH04238486A - Television telephone set - Google Patents

Abstract

PURPOSE:To provide a maintenance function to the television telephone set. CONSTITUTION:A 2nd switch 18 which connects a buffer 3 and a video CODEC 4 or a pattern generating section 17 and the video CODEC 4 is provided between the buffer 3 and the video CODEC 4 and the 2nd switch 18 is thrown to the position shown in dotted line in figure when a hold switch is closed to send a prescribed pattern to an opposite destination. During the holding state, a video image picked up by a television camera is not as it is sent to the destination and the transmission of a video image not desired to be sent to the destination is inhibited.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video telephone device having a hold function.

0002

[Background Art] Ordinary telephone devices are already equipped with a hold function, and by pressing the hold button, a silent state or a melody transmission state is created to transmit a conversation that you do not want the other party to hear. can be prevented.

0003

[Problems to be Solved by the Invention] However, in a videophone device, even if the hold function of a normal telephone device is used as is, it will only be able to prevent transmission of conversations that the other party does not want to hear, and even while on hold, The images captured by the TV camera are transmitted as-is to the other party, and the other party ends up seeing images that you do not want the other party to see.

SUMMARY OF THE INVENTION In view of the above-mentioned circumstances, it is an object of the present invention to provide a video telephone device that realizes hold on the image screen.

[0005]

[Means for Solving the Problems] In order to solve the above-mentioned problems, the videophone device according to the present invention includes a hold button operated by an operator, and a television camera that is activated when the hold button is operated. The present invention is characterized in that it includes means for stopping the transmission of the captured video as it is as a transmission image, and for transmitting another image or neutralizing the image transmission channel.

[0006]

[Function] According to the above structure, the video captured by the television camera is not transmitted as is to the other party during the hold period, and it is possible to prevent the transmission of images that the other party does not want to see.

[0007]

[Embodiment] An embodiment of the present invention will be described below with reference to FIG. FIG. 1 is a block diagram showing a schematic configuration of a video telephone device. This videophone device is
A video input unit 2 connected to an imaging camera 1, a buffer 3 that stores one frame of video signals, a video codec 4 that encodes and decodes the video signal, and a multi-demultiplexer that performs signal switching operations. 5, a network interface 6 for connecting the network and the video telephone device, a video output unit 7 connected to the video codec 4, a display 8 connected to the video output unit 7, - A delay circuit 9 connected to the demultiplexer 5, an audio codec 10 connected to this delay circuit 9, and an audio input/output section 11 connected to this audio codec 10.
, a handset 12 connected to this audio input/output section 11 , an end-to-end signal processing section 13 connected to the multi-demultiplexer 5 , and an end-to-network signal processing section connected to the network interface 6 . 14, and a system control section 15 connected to the end-to-network signal processing section 14 and the end-to-end signal processing section 13.

[0008] Between the video input section 2 and the buffer 3, there is a first switch for turning ON/OFF the connection between the video input section 2 and the buffer 3, for executing the hold function.
A switch 16 is provided. The first switch 16 is
It is activated by turning on a hold switch (not shown) provided on the outer surface of the housing of the videophone device. Note that the buffer 3 is not specially provided to execute the hold function, but is a buffer used for converting and buffering the analog signal from the television camera 1 into a digital signal, which is generally done in a video telephone device. I am using it.

[0009] Also, buffer 3 and video codec 4
A second switch 18 is provided between the buffer 3 and the video codec 4 to perform the hold function, or to connect the pattern generator 17 and the video codec 4. There is. The second switch 18 is activated by turning on the hold switch. Note that the pattern generation section 17 is a ROM in which a predetermined pattern is stored.
For example, a means for generating a luminance signal corresponding to a count value by a counter to generate a periodic light-dark pattern may be used.

The network interface 6 is provided with a digital loopback function section 6a for executing a hold function. The digital loopback function section 6a is based on H. This function executes the digital loopback function specified in the H.320 standard and the like. The content is a function that returns the image data sent by the other party to the other party as is, and is usually a function used for maintenance. Therefore, the digital loopback function is configured to be executed at the request of the other party, and also when the hold switch is turned on.

[0011] The system control unit 15 also executes the hold function using CCITT's H. 24
By the handshake signal presented in the 2 standards,
It has a function to neutralize the channel used for sending and receiving images. When stopping this function and transmitting images again, the mode switching sequence recommended in the same recommendation is performed. Execution of the neutral function and execution of the above sequence are performed by turning on the hold switch.
Activated by OFF operation.

For convenience of explanation, FIG. 1 shows a device that is equipped with all four of the first switch 16, second switch 18, digital loopback function section 6a, and neutral function as a device that executes the hold function. However, if one of these is provided, it is possible to hold the video image. In the above configuration, when the hold switch is turned on and the first switch 16 is switched to the position shown by the dotted line in the figure (the second switch 18 is in the solid line position), the video signal from the video input section 2 is transferred to the buffer 3. The frame image stored in the buffer 3 is transmitted to the other party. Therefore, the still image at the time when the hold switch is turned on is transmitted to the other party, and it is possible to prevent the sending of a video that the user does not want the other party to see.

On the other hand, when the hold switch is turned on and the second switch 18 is switched to the position shown by the dotted line in the figure, a predetermined pattern (either a moving image or a still image) supplied from the pattern generating section 17 is sent to the other party. will be sent out,
It is possible to prevent the transmission of images that you do not want the other party to see. In addition, when the digital loopback function section 6a is activated by turning on the hold switch, the image captured by the TV camera of the other party will be displayed on the display of the other party, and the image that you do not want the other party to see. transmission is prevented.

[0014] Furthermore, when the channel neutral function is executed by turning on the hold switch, image transmission is stopped and nothing is displayed on the display of the other party, so you do not want the other party to see it. Sending out of the video will be prevented.

[0015]

[Effects of the Invention] As described above, according to the present invention, the video captured by the TV camera is not transmitted as is to the other party while on hold, thereby preventing the transmission of images that the other party does not want to see. This has the effect of being able to execute a hold function on the video screen.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a video telephone device as an embodiment of the present invention.

[Explanation of symbols]

6a Digital loopback function section 15 System controller 16 First switch 17 Pattern generation section 18 Second switch

Claims (1)

[Claims] Claim 1: A hold button operated by an operator, and a system that, when the hold button is operated, stops transmitting the image captured by the television camera as it is as a transmitted image, while transmitting another image. 1. A video telephone device comprising means for transmitting or neutralizing an image transmission channel.