JPH0519729A - Image device and its sound volume control method - Google Patents

Abstract

PURPOSE:To automatically adjust the sound volumes of plural sounds. CONSTITUTION:This image device, equipped with a means which displays plural images on a display at optional positions successively or in an overlapping state to optional size according to the specification of a display control signal 5 by inputting plural video signals 1 and 2 and the display control signal 5 and a means which generates a sound output corresponding to the images to a speaker 11 by inputting plural sound signals 3 and 4 synchronized with the video signals 1 and 2 respectively, is equipped with sound volume adjusting circuits 8 and 9 on the output paths of the sound signals 3 and 4 and a sound volume control means which performs specific sound volume control by the adjustments of the sound volume adjusting circuits 8 and 9. The sound volumes can automatically be adjusted in synchronism with the images according to the states of the images and the sounds can independently be judged.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an application for displaying an image accompanied by two or more sounds on a screen by using a personal computer or a workstation, for example, on one personal computer, on the display. The present invention relates to automatic volume control suitable for a device in which a person's face is displayed on the telephone and a telephone line is used for conversation, while a VTR image is displayed on the display.

[0002]

2. Description of the Related Art Conventionally, most of the images displayed on the screen are one image, and the sound control is controlled by the user. Even if two images with sound are used, the volume of each sound associated with the conventional image must be adjusted independently of the display of the image, and if not adjusted, the two sounds will have the same volume. Hearing makes identification difficult. In addition, in order for the user to adjust the volume each time, a display for volume adjustment independent of the image display must be displayed, and when the number of types of images increases, the volume control becomes complicated. . Note that, as a device related to this type, for example, Japanese Patent Laid-Open Nos. 02-298989 and 02-297.
588 and so on.

[0003]

However, the above-mentioned prior art does not take into consideration the adjustment of the volume of a plurality of sounds, and when the user adjusts the volume of a plurality of sounds by himself / herself, as described above. , That must be adjusted independently of the image,
There is a problem in that it may be difficult to identify sounds and may be complicated. An object of the present invention is to provide an image device and a volume control method thereof that can automatically adjust the volume of a plurality of sounds. Another object of the present invention is to provide an image device having a volume control means capable of reducing the amount of data by compressing the data after adjusting the volume.

[0004]

The image device of the present invention for achieving the above object is provided with a volume adjusting circuit in the path to the output of the sound signal synchronized with the video signal, for example, as shown in FIG. A volume control means for detecting display information of an image designated by the display control signal and performing a predetermined volume control by adjusting the volume control circuit is provided. Here, as the display information of the image designated by the display control signal, for example, as shown in the display example of FIG. 2, the image size corresponding to each video signal or the image including a part of the image is overlapped. The information regarding the mutual positional relationship or the selection of the specific image is used, and the predetermined volume control based on the detection of the display information is performed on the image having the large size, or the image positioned in the front in the positional relationship before and after the overlapping, or For a specific image to be selected, the sound signal synchronized with this is set to a standard value, and for other images, the sound signal synchronized to this is reduced. Alternatively, as the display information of the image designated by the display control signal, for example, as shown in the display example in FIG. 2, the size of the image corresponding to each video signal or the image mutual information including the overlapping of a part of the images is displayed. The positional relationship between the images or the selection of a specific image, and the predetermined volume control based on the detection of the display information is applied to the image having the large size, or the image located in the front in the positional relationship before and after the overlapping, or the selection. The sound signal synchronized with this is reduced for the specific image of the target, and the sound signal synchronized with this is set to the standard value for the other images. Regarding the relationship between the center device and the terminal device in such an image device, as shown in FIG. 3, for example, the display information of the image designated by the display control signal is detected,
The center device is provided with a volume control means for performing a predetermined volume control by adjusting the volume control circuit, and by inputting a plurality of video signals and a display control signal, an arbitrary on the display according to the designation of the display control signal. The terminal device is provided with means for displaying a plurality of images arranged in an arbitrary size or partially overlapped with each other, and the center device sends a video signal and a volume-controlled sound signal to the terminal device. Sends the display control signal to the center device, and as a result, the terminal device outputs the image and sound controlled by the display control signal. Alternatively, for example, as shown in FIG. 9, in a case where a plurality of terminal devices are associated with each other, volume control means for detecting display information of an image designated by a display control signal and performing a predetermined volume control by adjusting a volume adjusting circuit, By inputting a plurality of video signals and a display control signal, a plurality of images are displayed at any position on the display in an arbitrary size or partially overlapped with each other according to the designation of the display control signal. A means is provided for each of the plurality of terminal devices, and the video signal and the volume-controlled sound signal are sent from one terminal device to the other terminal device, and the display control signal is sent from the other terminal device to the one terminal device. As a result, the other terminal device may output the image and sound controlled by the display control signal. Here, as the volume adjusting circuit, for example, as shown in FIG. 4, a quantizing circuit for obtaining an input of a sound signal and converting the input into a digital signal, and the above-mentioned quantum circuit in accordance with an instruction of a volume control signal for specifying a volume. A level shift circuit for deleting the lower bits of the output data of the digitizing circuit may be provided. This allows
The volume of data is small when the volume is low. Alternatively, in order to achieve the above-mentioned other object, the volume control circuit includes the above-mentioned quantization circuit, level shift circuit, and compression circuit for compressing the output data of the level shift circuit to reduce the data amount. To do. Alternatively, in order to achieve the above purpose of automatically controlling the volume, as shown in FIG. 5, for example, an identification code indicating the type of the image is added to the video signal, and a volume adjusting circuit is provided in each sound signal path. It is also possible to provide a volume control means for detecting the identification code and performing a predetermined volume control according to the identification code by adjusting the volume adjustment circuit. Further, as a volume control method of the present invention for achieving the purpose of automatically controlling the volume, for example, as shown in FIG. 11, a video signal is output to a display device in accordance with the display control signal, and the display control signal The display position of the image to be designated, or the size, or the selection information of the specific image is detected, and the image display position is located at the previous position in the positional relationship of the front and rear of the image,
Alternatively, the sound signal corresponding to the image with a large display image or the selected specific image is set to the standard value, and the sound signals corresponding to the other images are reduced, or conversely, the former is reduced to set the latter to the standard value. The sound signals controlled by are added and output from the speaker. Alternatively, as a method for achieving the same purpose, for example, as shown in FIG. 12, an identification code indicating the type of image is added to a video signal, and multimedia data having the configuration of the identification code, the video signal and the sound signal is added. Separate each configuration from the input, detect the identification code, read the volume value indicated by the code, multiply the volume of the sound signal synchronized with the video signal corresponding to the identification code by a predetermined volume value, and It will be output from the speaker. Further, for example, as shown in FIG. 14, in the volume control method of the image device in the case where the continuous sound and the intermittent sound are simultaneously output, the input intermittent sound signal is inspected, and when the intermittent sound signal is detected, the volume adjusting circuit Adjust the volume of the continuous tone to a standard value by adjusting the volume adjustment circuit to reduce the volume of the continuous tone, and if the intermittent tone signal is not detected, add the continuous tone signal and the intermittent tone signal from the speaker. It may be output.

[0005]

By controlling the volume using the display control signal in the present invention, the volume control in cooperation with the image becomes possible. Therefore, according to the present invention, it is possible to adjust the volume according to the state in which the image is displayed, without adjusting the volume independently of the image under the control of the user. Further, by detecting the display information of the image designated by the display control signal and performing a predetermined volume control, the volume is controlled by the positional relationship between the images, the size of the image, and the selection information of the image when the image and the volume are linked. It becomes possible to bring about volume control that is convenient for the user, such as controlling. In volume control, when the volume is low, deleting the lower bits of the digital data of the sound signal to control the volume reduces the amount of data. Therefore, it becomes possible to effectively utilize the transmission line by controlling the volume and compressing the data and sending the data to the transmission line. By adding an identification code indicating the type of video to the video signal and detecting the identification code and performing a predetermined volume control, the volume of the video signal accompanied by a plurality of different sounds can be output at the specified volume. It will be possible. In addition, when the intermittent sound signal is detected, the volume of the continuous sound is reduced, and when the intermittent sound signal is not detected, the volume of the continuous sound is set to the standard value. Even when there is an intermittent sound such as a call sound, the continuous sound is reduced when the intermittent sound is present, which facilitates the identification of the intermittent sound.

[0006]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a block diagram showing a first embodiment of the present invention, and FIG. 2 is a display example of a display screen in the embodiment. In FIG. 1, 1 and 2 are independent video signals, and 3
Is a sound signal synchronized with the video signal 1, and 4 is a sound signal synchronized with the video signal 2. Reference numeral 5 is a display control signal that specifies the display position of the video signal 1 and the video signal 2. Reference numeral 6 is a screen display circuit that outputs the video signals 1 and 2 to a designated position, and reference numeral 7 is a display device that displays the output of the screen display circuit 6. Reference numeral 8 is a volume adjusting circuit for adjusting the volume of the sound signal 3, and 9 is a volume adjusting circuit for adjusting the volume of the sound signal 4. Reference numeral 10 is an adder circuit for adding the outputs of the volume adjusting circuits 8 and 9.
Reference numeral 11 is a speaker. A volume control circuit 12 controls the volume adjusting circuits 8 and 9. In FIG. 2, 20 is a display screen of the display device 7, 21 is an example of a display area of the video signal 1, and 22 is an example of a display area of the video signal 2. 23
Is an arrow for indicating one point on the display screen.

Next, taking the display screen of FIG. 2 as an example, the operation of each section of FIG. 1 will be described based on the flowchart of FIG.
The video signals 1 and 2 are displayed on the display device 7 by the screen display circuit 6 according to the control signal 5 as shown in FIG. 2 (151). The volume control circuit 12 uses the display control signal 5
Among the display information of the image designated by, the volume control circuits 8 and 9 are independently controlled according to the position information of the image to adjust the volume. In the example of FIG. 2, the video signal 1 is displayed in the display area 21 and the video signal 2 is displayed in the display area 22,
The display area 21 is displayed before the display area 22. The volume control circuit 12 detects a display positional relationship in which the video signals 1 and 2 overlap each other before and after the image (152). When the video signal 1 is located before the video signal 2, the volume control circuit 8 detects the sound signal 3. The volume adjuster 9 operates so that the volume becomes the standard value, and the volume adjusting circuit 9 operates so as to reduce the volume of the sound signal 4 (15).
4). Further, when the video signal 2 is located before the video signal 1, the volume adjusting circuit 9 operates so that the volume of the sound signal 4 becomes the standard value, and the volume adjusting circuit 8 reduces the volume of the sound signal 3. It operates (155). The sound signals thus controlled are combined by the adding circuit 10 and output by the speaker 11 (156). The volume relationship of the volume and the front-rear position relationship of the image can be reversed.

For example, when the video signal 1 is located before the video signal 2, the volume adjusting circuit 8 operates to reduce the volume of the sound signal 3, and the volume adjusting circuit 9 sets the volume of the sound signal 4 to the standard value. It goes without saying that it can also work like.

In the above embodiment, the volume is controlled by the front and rear positions of the display area, but the volume can be controlled by the size of the display area. For example, the display area 1
Since it is larger than the display area 2, the volume adjusting circuit 9 can operate so that the volume becomes low (or high). It is also possible to select a video signal corresponding to a sound signal whose volume is to be increased or decreased, by selecting a display area, and control the corresponding volume. For example, since the arrow 23 is above the display area 21, the volume adjusting circuit 9 can operate so that the volume becomes low (or high). Needless to say, the volume control can be performed continuously or stepwise. According to the above-described embodiment, even if the user does not adjust the volume, the volume is controlled in synchronization by designating the display of the image on the screen, so that the smooth operation can be performed.

Next, a second embodiment in which the terminal device and the center device are connected via the transmission line in the example of FIG. 1 will be described. FIG. 3 is a block diagram showing a second embodiment of the present invention,
The display on the CRT screen is the same as the example of FIG. 2 described above. In FIG. 3, reference numeral 60 is a center device, and 61 is a terminal device. Reference numerals 31 and 32 are independent video signals, 33 is a quantized sound signal synchronized with the video signal 31, and 34 is a quantized sound signal synchronized with the video signal 32. 35
Is a shift circuit for adjusting the volume of the sound signal 33, and 36 is a shift circuit for adjusting the volume of the sound signal 34. Reference numeral 37 is an adder circuit for adding the outputs of the shift circuits 35 and 36.
8 is the added sound signal. 39 is a video signal 31, 3
2 is a multiplexing circuit for multiplexing the sound signal 38 and the sound signal 38. Reference numeral 49 is a display control signal for designating display information such as a position to be displayed on the screen by the video signal 31 and the video signal 32. Reference numeral 50 is data to be transmitted, and 51 is a multiplexing circuit for multiplexing the data 50 and the display control signal 49. 40
Is a transmission circuit for transmitting the output of the multiplexing circuit 39, 42 is a transmission line, and 44 is a reception circuit for a signal transmitted via the transmission line 42. Reference numeral 43 is a transmission circuit for transmitting the output of the multiplexing circuit 51. Reference numeral 45 is a separation circuit that separates signals received after being multiplexed by the multiplexing circuit 51, 46 is a received display control signal, and 48 is received data. Reference numeral 59 is a separation circuit that separates the signals multiplexed by the multiplexing circuit 39 and received through the reception circuit 44, 57 is the same video signal as the separated video signal 31, and 58 is the separated video signal 32. The video signal 52 is the same as the sound signal 38, and 52 is the same sound signal as the separated sound signal 38. Reference numeral 53 is a screen display circuit that outputs the video signals 57 and 58 to the designated positions of 21, 22 in FIG. 2, and 54 is a display device that displays the output of the screen display circuit 53. Reference numeral 55 is a decompression circuit as a decoder for converting the sound signal 52 into an analog signal, and 56 is a decompression circuit 5.
5 is a speaker that outputs the sound output by the device 5. Next, the operation of each unit in FIG. 3 will be described by taking the display screen in FIG. 2 as an example. The video signals 31 and 32 are transmitted via the transmission path 42 to the terminal device 61.
Is sent to the screen display circuit 5 according to the control signal 49.
3 is displayed on the display device 54 as shown in FIG. The volume of the sound signals 33 and 34 is adjusted by the shift circuits 35 and 36 for adjusting the volume, and the addition circuit 37 is used.
And is sent to the terminal device 61. Terminal device 61
The sound signal 52 received by is converted into an analog signal by the expansion circuit 55 and output by the speaker 56.
The volume control circuit 47 operates so as to independently control the shift circuits 35 and 36 based on, for example, position information of the image of the display control signal 46 to adjust the volume. In the example of FIG. 2, since the display area 1 is displayed before the display area 2, the shift circuit 36 operates to reduce the volume. Alternatively, since the display area 1 is larger than the display area 2, the shift circuit 36
Also works to reduce the volume. Or arrow 2
Since 3 is above the display area 21, the shift circuit 36 operates so as to reduce the volume. It goes without saying that the adder 37 of the above embodiment can also be applied to a compression circuit.
According to the above-mentioned embodiment, even if the user does not adjust the volume, the volume is controlled synchronously by designating the display of the image on the screen, so that the smooth operation can be performed.

In the above two embodiments, the case where there are two video signals is taken as an example, but it goes without saying that it can be applied to two or more video signals.

Next, another embodiment for controlling the volume will be described with reference to FIG. FIG. 4 is a block diagram showing a third embodiment of the present invention. In FIG. 4, 70 is an input sound signal,
Reference numeral 71 is a quantization circuit for converting an input into a digital signal, 7
Reference numeral 7 is a volume control signal for designating the volume, and 72 is a level shift circuit for changing the volume by bit-shifting so that lower bits are deleted when the volume of the quantized data is reduced by the volume control signal 77. Is a compression circuit for compressing the quantized data, 74 is an expansion circuit for restoring the compressed data based on the original data, and 76 is a speaker for outputting sound. Next, the operation of each unit in FIG. 4 will be described. The input analog sound signal 70 is converted into a digital signal by the quantizing circuit, and the volume is adjusted by the level shift circuit 72 according to the instruction of the volume control signal 77 for designating the volume. Data of the sound signal 70 whose volume has been adjusted is compressed by a compression circuit 73, and the compressed data is restored by an expansion circuit 74 and output by a speaker 76.
According to the above embodiment, it is possible to reduce the sound compression data when the volume is low.

Next, another embodiment for controlling the volume will be described with reference to FIG. FIG. 5 is a block diagram showing a fourth embodiment of the present invention, FIG. 6 is a structure of multimedia data in the embodiment, and FIG. 13 is an identification code table. In FIG. 5, 80 is the multimedia data 9 of FIG.
0 is a multimedia data, 81 is a separation circuit for dividing the multimedia data into a video signal 82, a sound signal 83 and an identification code 84, 85 is a volume adjusting circuit for adjusting the volume, 87 is a speaker, and 86 is an identification. The code analysis circuit outputs a signal for controlling the volume from the code 91. In FIG. 13, 167 is an identification code table, 165 is an identification code area, and 166 is a volume value area. Next, the operation of each part of FIG. 5 will be described based on the flowchart of FIG. The input multimedia data 80 is the identification code 9 as shown in the multimedia data 90 of FIG.
1, a video signal 92 and a sound signal 93. The multimedia data 80 is divided by a separation circuit 81 into a video signal 81, a sound signal 83, and an identification code 91 (16
1), the identification code 84 is inspected by the code analysis circuit 86, and the volume value 1 according to the identification code 165 of FIG.
66 is read (162). The volume of the sound signal 83 is set to 1 by the volume adjusting circuit 85 according to the volume value 166.
The volume value of 66 is controlled (163), and the sound is output from the speaker 87 (164). This embodiment is an example of the case of inputting one multimedia data, but it goes without saying that it can be applied to a plurality of inputs at the same time. According to the above embodiment, it is possible to always output the volume of the video signal accompanied by a plurality of different sounds at the designated volume.

Next, another embodiment for controlling the volume will be described with reference to FIG. FIG. 7 is a block diagram showing a fifth embodiment of the present invention, and FIG. 8 is a time chart showing volume control in the fifth embodiment. In FIG. 7, reference numeral 100 is a continuous sound signal that is continuously input, and continuous sound corresponds to, for example, sound of a movie or television, and 101 is an intermittent sound signal that is input intermittently, such as a telephone. This corresponds to the call sound in. Reference numeral 102 is a volume adjusting circuit for adjusting the volume, 105 is a level detecting circuit for inspecting the input sound signal, 103 is an adding circuit for adding the input sound signals, and 104 is a speaker. Next, the operation of each part of FIG. 7 will be described with reference to FIG. 8 based on the flowchart of FIG.
The level detection circuit 105 inspects the intermittent sound signal 101 (1
71), when the intermittent sound signal is detected, the continuous sound signal 10
0 is controlled by the volume adjusting circuit 102 so as to lower the volume of the output sound (173), and when the intermittent sound signal is not detected, the continuous sound signal 100 is changed to the volume adjusting circuit 102.
Then, the output sound is controlled (174) so that the output sound has a standard volume. The continuous sound signal is added to the intermittent sound signal by the adding circuit 103 and output from the speaker 104 (175). According to the above-described embodiment, when there is an intermittent sound, the continuous sound becomes small, so that the intermittent sound can be easily identified.

Next, an embodiment of the terminal device using the above volume control method will be described with reference to FIGS. 9 and 10. FIG. 9 is a block diagram showing a sixth embodiment of the present invention, and FIG. 10 is a block diagram of a terminal device in the sixth embodiment. Figure 9
, 110 is a station line, 111 is a switch, 112, 1
13 is a subscriber line, 114 and 118 are terminal devices, 115 is a screen displayed by the terminal device 114, and 119 is the terminal device 11.
A screen displayed by 8, a network 122 for transmitting data between terminal devices, a center device 123 for managing images, a recording device 124 for recording images, a network 116 for image data of the recording device 124 of the center device 123. The image transferred to the terminal device 114 via 122, 12
0 is an image obtained by transferring the image data of the recording device 124 of the center device 123 to the terminal device 118 via the network 122, 117 is an image sent from the terminal device 118 via the exchange 111, and 121 is an exchange from the terminal device 114. Bowl 1
11 is an image sent via 11. 13 in FIG.
0 is a network corresponding to the network 122 of FIG. 9, 131 is a network interface, 132 is a subscriber line corresponding to the subscriber lines 112 and 113 of FIG. 9, 13
3 is a subscriber line interface, 134 is an image expansion circuit,
Reference numeral 135 is a sound sound expansion circuit, 136 is an image expansion circuit for expanding a compressed image received via the subscriber line 132, and 137 is an expansion unit for expanding a compressed voice received via the subscriber line 132. Audio expansion circuit, 140 is a camera, 1
Reference numeral 41 is a microphone, 138 is an image compression circuit that compresses the image captured by the camera 140 and transmits it via the subscriber line 132, and 139 is a voice compression that compresses the voice captured by the microphone 141 and transmits it via the subscriber line 132. A circuit, 146 is a CPU for controlling the whole, 147 is a memory for recording programs and data, 143 is an image expansion circuit 134, 13.
6 is an image synthesizing circuit for synthesizing the image output by the CPU 146, 142 is a display device for displaying the video output signal of the image synthesizing circuit 143, and 144 is the output of the sound expanding circuit 135 and the audio expanding circuit 137 of the present invention. Volume control circuit 145 for controlling and synthesizing the volume of the
4 is a speaker that outputs the output sound of No. 4. Next, the operation of each unit in FIG. 10 will be described with reference to FIG. The center device 123 uses the sound and image compressed data stored in the storage device 124 via the network 122 to connect to the terminal devices 114 and 11.
Transfer to 8. In the terminal devices 114 and 118, the image is expanded by the image expansion circuit 134 and the sound is expanded by the sound expansion circuit via the network interface 131. Between terminal devices 11
In Nos. 4 and 118, the image and the sound input from the camera 140 and the microphone 141 are respectively compressed by the image compression circuit 138 and the audio compression circuit 139 and sent from the subscriber line interface to the other terminal device via the switch 111. Further, the compressed image and sound may be sent to another exchange via the station line 110. The compressed image and sound sent are respectively the image decompression circuit 136.
Is expanded by the audio expansion circuit 137. The two images are combined by the image combining circuit 143 with the data created by the CPU 146 and displayed on the display device 142.
The volumes of the two voices are adjusted by the volume adjusting circuit 144 according to the first to fifth embodiments, and output from the speaker 145. In the above-mentioned embodiments, the embodiment in which the volume is controlled according to the display information regarding the position, size, and selection of the image has been described, but conversely, the display of the image can be controlled by the volume. .

[0016]

According to the present invention, the volume can be automatically adjusted in synchronization with the image depending on the state of the image.
In addition, the sound can be judged independently.

[Brief description of drawings]

FIG. 1 is a block diagram showing a first embodiment of the present invention.

FIG. 2 is a diagram showing a display example of a display screen in the embodiment.

FIG. 3 is a block diagram showing a second embodiment of the present invention.

FIG. 4 is a block diagram showing a third embodiment of the present invention.

FIG. 5 is a block diagram showing a fourth embodiment of the present invention.

FIG. 6 is a structural diagram of multimedia data according to a fourth embodiment.

FIG. 7 is a block diagram showing a fifth embodiment of the present invention.

FIG. 8 is a time chart showing volume control in the fifth embodiment.

FIG. 9 is a block diagram showing a sixth embodiment of the present invention.

FIG. 10 is a block diagram of a terminal device according to a sixth embodiment.

FIG. 11 is a flowchart showing the operation of the first embodiment.

FIG. 12 is a flowchart showing the operation of the fourth embodiment.

FIG. 13 is an identification code table according to the fourth embodiment.

FIG. 14 is a flowchart showing the operation of the fifth embodiment.

[Explanation of symbols]

1, 2 ... video signal, 3, 4 ... sound signal, 5 ...
Display control signal, 6 ... Screen display circuit, 7 ... Display device, 8, 9 ... Volume adjustment circuit, 10 ... Addition circuit, 11 ... Speaker, 12 ... Volume control circuit

Claims (11)

[Claims] 1. By inputting a plurality of video signals and a display control signal, according to the designation of the display control signal,
The sound corresponding to the image is input by a means for displaying a plurality of images at an arbitrary position on the display in an arbitrary size, or by overlapping a part of them, and by inputting a plurality of sound signals synchronized with each of the video signals. In an image device having means for generating an output to a speaker, a volume adjusting circuit is provided in a path to an output of a sound signal, display information of an image designated by the display control signal is detected, and predetermined by adjusting the volume adjusting circuit. An image device comprising a volume control unit for controlling the volume of the image. 2. The image device according to claim 1, wherein the display information of the image designated by the display control signal is the size of the image corresponding to each video signal, or the mutual image information including overlapping of a part of the image. Information related to the positional relationship or the selection of a specific image, and the predetermined volume control by detecting the display information is performed by the image having the large size, the image located in the front in the positional relationship before and after the overlap, or the selection described above. The sound signal synchronized with the specific image of
An image device characterized by reducing a sound signal synchronized with other images. 3. The image device according to claim 1, wherein the display information of the image designated by the display control signal is the size of the image corresponding to each video signal, or the mutual image information including a part of the image overlap. Information related to the positional relationship or the selection of a specific image, and the predetermined volume control by detecting the display information is performed by the image having the large size, the image located in the front in the positional relationship before and after the overlap, or the selection described above. The image device is characterized in that the sound signal synchronized with the target specific image is reduced and the sound signals synchronized with the other images are set to standard values. 4. The volume control according to any one of claims 1 to 3, wherein display information of an image designated by a display control signal is detected and a predetermined volume control is performed by adjusting a volume adjusting circuit. The center device is provided with a means, and a plurality of video signals and a display control signal are input, and according to the designation of the display control signal, they are arranged in an arbitrary position on the display in an arbitrary size or partially overlapped. The terminal device is provided with means for displaying a plurality of images by sending a video signal and a volume-controlled sound signal to the terminal device, and a display control signal from the terminal device to the center device.
As described above, the terminal device outputs the image and sound controlled by the display control signal. 5. The volume control according to any one of claims 1 to 3, wherein display information of an image designated by a display control signal is detected, and a predetermined volume control is performed by adjusting a volume adjusting circuit. Means, a plurality of video signals, and a display control signal are input, and a plurality of images are arranged at an arbitrary position on the display in an arbitrary size or partially overlapped with each other according to the designation of the display control signal. Is provided to each of the plurality of terminal devices, and the video signal and the volume-controlled sound signal are sent from one terminal device to the other terminal device, and the display control signal from the other terminal device is sent to the other terminal device. An image device characterized in that the image is sent to a terminal device, and thus the other terminal device outputs an image and sound controlled by a display control signal. 6. The image device according to claim 1, wherein the volume adjusting circuit receives a sound signal input and converts the input into a digital signal.
An image device comprising a level shift circuit for deleting a lower bit of output data of the quantization circuit according to an instruction of a volume control signal designating a volume. 7. An image device according to claim 1, wherein the volume adjusting circuit receives a sound signal input and converts the input into a digital signal.
An image device comprising a level shift circuit for deleting lower bits of output data of the quantization circuit according to an instruction of a volume control signal designating a volume, and a compression circuit for compressing output data of the level shift circuit. . 8. By inputting a plurality of video signals and a display control signal, according to the designation of the display control signal,
The sound corresponding to the image is input by a means for displaying a plurality of images at an arbitrary position on the display in an arbitrary size, or by overlapping a part of them, and by inputting a plurality of sound signals synchronized with each of the video signals. In an image device having means for generating an output to a speaker, an identification code indicating a type of image is added to a video signal, a volume adjusting circuit is provided in each sound signal path, and the identification code is detected to adjust the volume. An image device comprising a volume control means for performing a predetermined volume control according to an identification code by adjusting a circuit. 9. A plurality of video signals and a plurality of sound signals synchronized with the respective video signals, and a plurality of images on a display of a display device at arbitrary positions and arbitrary sizes according to a display control signal. In a method of controlling the volume of an image device that displays sounds side by side or partially overlap with each other and outputs sound corresponding to each image, output a video signal to the display device according to the display control signal and specify the display control signal. The display position or size of the image or the selection information of the specific image is detected, and the image display position is in the previous position due to the positional relationship of the front and back of the image, or the image with the large display image or the selected image. The sound signal corresponding to the specific image is set to the standard value and the sound signals corresponding to the other images are reduced, or conversely, the former is reduced and the latter is set to the standard value. A sound volume control method for an image device, comprising adding a more controlled sound signal and outputting the sound signal from a speaker. 10. A plurality of video signals and a plurality of audio signals synchronized with the respective video signals, and a plurality of images on a display of a display device at arbitrary positions and arbitrary sizes according to a display control signal. In a method of controlling the volume of an image device that outputs sound corresponding to each image while displaying them side by side or partially overlapping with each other, an identification code indicating the type of the image is added to the video signal, and the identification code and the video signal are added. The volume of the sound signal synchronized with the video signal corresponding to the identification code is detected by detecting the identification code, separating the respective configuration from the input of the multimedia data having the configuration of the sound signal and Is multiplied by a predetermined volume value, and a sound signal is output from a speaker. A volume control method for an image device. 11. A volume control method for an image device in the case where a continuous sound and an intermittent sound are output at the same time, the intermittent sound signal being input is inspected, and when the intermittent sound signal is detected, it is continuously adjusted by a volume adjusting circuit. If the volume of the sound is reduced and the intermittent sound signal is not detected, control the volume of the continuous sound to the standard value by adjusting the volume adjustment circuit, add the continuous sound signal and the intermittent sound signal, and output from the speaker. A volume control method for an image device, comprising: