JP2001128157A - Picture transmission equipment and interphone device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten the transmission time of picture data with the same data transmission speed in picture transmission equipment, especially, an interphone device. SOLUTION: A picture taken in by a camera 13 of an entrance slave machine 12 is subjected to digital video conversion by an encoder 21 and is compressed by JPEG, MPEG, or the like in a picture compression processing part 22. Compressed picture data is multiplexed with a voice signal in time division by a terminal machine 26 for transmission and reception and is transmitted. Picture data received by a terminal machine 29 for transmission and reception of a kitchen remote controller 2 is separated from the voice signal by the terminal machine 29 and is expanded (decompressed) by a picture expansion processing part 31 and is analogically converted to a video signal by a decoder 34.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image transmitting apparatus for compressing and transmitting a moving image and an intercom apparatus having a function of transmitting an image as digital data or compressed image data.

[0002]

2. Description of the Related Art An intercom apparatus having an image display function has been conventionally known. This uses a CCD camera inside an outdoor unit (entrance slave unit) installed at the entrance, etc., to photograph visitors and the state of the entrance, and transmits the captured image data as analog signals to indoor units (indoor slave units) via signal lines. Then, the image is reproduced in the indoor unit and displayed on the liquid crystal monitor.
In addition, a call can be made between an outdoor unit and an indoor unit, similarly to a normal intercom device.

[0003] If such an intercom apparatus is installed, it is possible to confirm a visitor with an image or monitor the state of the entrance, so that it is being widely used as one of home security functions.

[0004]

Conventionally, in such an intercom apparatus, image data is transmitted as an analog signal, and there is no apparatus that transmits a digital signal. When data transmission and reception between the outdoor unit and the indoor unit of the intercom apparatus is performed by the analog transmission method, the transmission signal waveform is distorted, and when the attenuation is large, the image data cannot be reproduced on the indoor unit side, However, there is a problem that the image is distorted and the image noise is large.

Further, even if image data photographed by a camera of an outdoor unit is converted into digital data and transmitted to the indoor unit, if the data volume of the image data is large, it is necessary to transmit one image data. The time required is long. In particular, as the resolution of an image to be captured is increased, the data capacity is increased, so that the image transmission speed becomes an increasingly important problem.

Further, in the case of a moving image, the smoothness of the movement of the image is determined by the number of images that can be displayed per second, and if the number of images that can be transmitted per second is small, the indoor unit reproduces the image. The image becomes jerky. Therefore, if a smooth moving image can be displayed on the indoor unit side, the amount of data transmission per unit time also increases dramatically.

However, in order to increase the amount of data transmission per unit time (data transmission speed), a microcomputer chip for image processing capable of high-speed processing, a high-speed modem, and the like are required, and there are technical restrictions. However, there is a problem that the cost is high.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art. It is an object of the present invention to provide an image transmission apparatus, particularly an intercom apparatus, which has the same data transmission speed even if the data transmission speed is the same. Is to be able to shorten.

[0009]

An image transmitting apparatus according to claim 1 is an image transmitting apparatus for transmitting moving image data from a transmitting apparatus to a receiving apparatus, wherein the transmitting apparatus transmits the moving image data. Read, has a function of compressing the read moving image data, and transmitting the compressed moving image data, the receiving device decompresses the compressed data related to the transmitted moving image, and decompresses the decompressed moving image data. It is characterized by having a function of displaying on the display means.

According to a second aspect of the present invention, there is provided an intercom apparatus having at least an outdoor unit and an indoor unit, wherein the outdoor unit has an image pickup means for taking in an image relating to a visitor, and the image pickup means has taken in. Means for converting an image into digital data, image data transmission means for transmitting the converted image digital data to the indoor unit, and outdoor unit communication means for communicating voice information with the indoor unit. Wherein the indoor unit has image display means for displaying an image based on image digital data sent from the outdoor unit, and indoor unit communication means for communicating voice information with the outdoor unit. Features.

According to a third aspect of the present invention, there is provided an intercom apparatus including at least an outdoor unit and an indoor unit, wherein the outdoor unit has an image pickup means for taking in an image of a visitor, and the image pickup means has taken in the image. Image data compression means for compressing an image to create compressed image data;
An image data transmitting unit for transmitting the image data compressed by the image data compressing unit to the indoor unit, and an outdoor unit communication unit for exchanging voice information with the indoor unit, the indoor unit includes: Image data decompression means for decompressing compressed image data sent from the outdoor unit, and image display means for displaying an image based on image data decompressed by the image data decompression means sent from the outdoor unit And indoor unit communication means for exchanging voice information with the outdoor unit.

According to a fourth aspect of the present invention, in the intercom apparatus according to the third aspect, the image data transmitting means transmits image digital data for transmission created by compressing the image data by the image data compressing means. The outdoor unit transmits the indoor unit to the indoor unit, and the outdoor unit communication unit and the indoor unit communication unit transmit the audio digital data obtained by converting the audio data by the audio encoding method to the outdoor unit communication unit and the indoor unit communication. It is characterized in that voice information is exchanged by transmitting and receiving to and from means.

According to a fifth aspect of the present invention, in the intercom apparatus of the third aspect, the image data transmitting means is created by compressing the image data by the image data compressing means, and further modulated by a phase modulation method. Transmitting the digital image data for transmission from the outdoor unit to the indoor unit, wherein the outdoor unit communication means and the indoor unit communication means convert the audio data by an audio encoding method, and further convert the audio data by a phase modulation method. The voice information is communicated by transmitting and receiving the voice digital data modulated by the communication between the outdoor unit communication unit and the indoor unit communication unit.

According to a sixth aspect of the present invention, there is provided an intercom apparatus including at least an outdoor unit and an indoor unit, wherein the outdoor unit has an imaging unit for capturing an image of a visitor, and the imaging unit has captured the image. Image data compression means for compressing an image to create compressed image data;
The indoor unit, comprising: an image data transmitting unit that transmits image data compressed by the image data compressing unit to the indoor unit; and an outdoor unit communication unit that transmits and receives audio information to and from the indoor unit. Image data decompression means for decompressing the compressed image data sent from the outdoor unit, and an image display for displaying an image based on the image data sent from the outdoor unit and decompressed by the image data decompression means Means, and indoor unit communication means for transmitting and receiving voice information between the outdoor unit, image data transmission from the outdoor unit to the indoor unit by the image data transmission means, the outdoor unit communication And transmitting the voice information from the means to the indoor unit communication means by time division multiplex communication.

According to a seventh aspect of the present invention, in the intercom apparatus according to the third, fourth, fifth or sixth aspect, the compression method used in the image data compression means is a JPEG compression method or an MPEG compression method. It is characterized by having. Where JPEG or MP
The version of the EG is not particularly limited.

According to an eighth aspect of the present invention, in the intercom apparatus according to the third, fourth, fifth, or sixth aspect, the image data compression unit sequentially compresses and transmits a plurality of still images. The image data decompressing means sequentially decompresses the compressed data and sequentially displays a still image to display the still image as a moving image on the image display means.

According to a ninth aspect of the present invention, in the intercom apparatus according to the third, fourth, fifth or sixth aspect, the image data compression means compresses and transmits a moving image, and It is characterized in that the decompressing means sequentially decompresses the compressed data and displays it as a moving image.

An intercom apparatus according to claim 10 is
7. The image data decompressing means in the intercom apparatus according to claim 3, wherein the image data compressing means compresses and transmits information relating to a basic still image and motion change data corresponding thereto. The means is characterized in that the compressed data is sequentially decompressed and displayed as a moving image.

Note that a still image and a moving image are used in a sense generally used in image engineering and the like, but a moving image simply means that an image displayed on a display unit appears to move. It may be a continuous still image or a moving image.

[0020]

In the image transmitting apparatus according to the first aspect, the moving image data is compressed by the transmitting apparatus and transmitted, and the moving image data is decompressed and displayed by the receiving apparatus. The amount of data transmission between the device and the receiving device can be reduced. Therefore, the amount of image information that can be transmitted per unit time can be increased even if the data transmission speed in the transmission / reception circuit or the transmission line is the same.

In the intercom apparatus according to the present invention, the image taken by the image pickup means is converted into digital data and transmitted to the indoor unit, and the image is converted based on the image digital data sent from the outdoor unit. Since the image is displayed on the display means, the transmission signal waveform can be accurately reproduced on the receiving side, and the image is less likely to be distorted or contain much image noise on the receiving side. The image on the machine becomes easier to see.

According to the third aspect of the present invention, the image taken in the outdoor unit is compressed and transmitted to the indoor unit, and the compressed image data is decompressed and displayed in the indoor unit. Even if the data transmission speed of the data transmission means is the same,
The time from image capture in an outdoor unit to image display in an indoor unit can be shortened without substantially lowering image quality, and the time lag between a call and image display can be reduced. In particular, even when the image becomes large or fine, the image can be transmitted quickly.

Also, in the case of a moving image, since the image transmission time can be shortened without substantially deteriorating the image quality by compressing and transmitting the image data, the motion of the moving image reproduced by the indoor unit can be smoothly performed. can do.

Further, by providing the indoor unit with the image data decompression means, it is possible to easily add an indoor unit.

According to a fourth aspect of the present invention, in the intercom apparatus according to the third aspect,
Since the compressed digital image data is transmitted from the outdoor unit to the indoor unit, high-quality images can be transmitted at a high speed. Since the data is transmitted and received to and from the communication means, it is possible to reproduce sound with little noise.

According to a fifth aspect of the present invention, in the intercom apparatus according to the third aspect, since the compressed image digital data modulated by the phase modulation method is transmitted from the outdoor unit to the indoor unit, high quality is achieved. Since the image can be transmitted at a higher speed, and the voice digital data converted by the voice coding method and phase-modulated is transmitted and received between the outdoor unit communication means and the indoor unit communication means,
High quality sound with little noise can be reproduced.

In the intercom apparatus according to the sixth aspect, the image captured by the outdoor unit is compressed and transmitted to the indoor unit, and the compressed image data is decompressed and displayed by the indoor unit. Even if the data transmission speed of the data transmission means is the same,
The time from image capture in an outdoor unit to image display in an indoor unit can be shortened without substantially lowering image quality, and the time lag between a call and image display can be reduced. In particular, even when the image becomes large or fine, the image can be transmitted quickly.

Further, by providing the indoor unit with the image data decompression means, it is possible to easily add an indoor unit.

Further, the image data transmission means transmits the image data from the outdoor unit to the indoor unit and the voice information transmission from the outdoor unit communication means to the indoor unit communication means by time division multiplex communication. Therefore, image data and audio information can be transmitted in a time-division manner by the same signal line,
Wiring work when installing the intercom apparatus can be simplified.

According to a seventh aspect of the present invention, in the intercom apparatus of the third, fourth, fifth or sixth aspect, the compression method used in the image data compression means is a JPEG compression method or an MPEG compression method. System. According to JPEG and MPEG, images can be compressed at a high compression rate, and since they are widely used or are being widely used, microcomputer chips for image compression can be obtained at low cost. The cost of the device can be reduced.

According to another aspect of the present invention, a plurality of still images are sequentially compressed and transmitted, and the image data decompression means sequentially decompresses the compressed data and sequentially displays the still images. Accordingly, the moving image is displayed on the image display means as a moving image, and the moving image can be easily displayed.

The intercom apparatus according to the ninth aspect compresses a moving image and transmits the moving image, and can increase the image compression ratio as compared with a case where a still image is compressed and transmitted. In particular, the image captured by the outdoor unit of the intercom device,
Since the still portion is the majority, if the information on the basic still image and the motion change data corresponding thereto is compressed and transmitted as in the intercom apparatus according to claim 10, the compression rate is further increased. Can be increased.

[0033]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail. FIG. 1 is an overall configuration diagram schematically showing a water heater with a TV camera intercom remote controller according to an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a water heater having a burner, a heat exchanger, a blower fan, and the like that uses gas, oil, or the like as a fuel, 2 denotes a kitchen remote controller installed in an indoor kitchen (or near the kitchen), 7 Is a bath remote controller installed in a bathroom, 12 is a door unit of a camera door phone installed in a gatepost / entrance, and the kitchen remote controller 2 and the bath remote controller 7 are connected to the water heater 1 by cables 17 and 18. Power is supplied from the water heater 1 to each of the remote controllers 2 and 7, and the kitchen remote controller 2 and the entrance slave unit 12 are connected by a low-voltage DC two-core power line 19.

The kitchen remote controller 2 has a function of remotely controlling the hot water temperature of the water heater 1 and a function as a master unit of the TV door phone, and displays remote control switches (not shown) and an image. Display unit (LCD monitor) 3, call microphone 4,
A speaker 5 and a call button 6 are provided. The bath remote controller 7 also has a function as a master unit of the TV door phone, and switches (not shown) for setting a water level in the bathtub, a heating temperature, and the like, and a display unit (liquid crystal monitor) 8 for displaying an image. , A call microphone 9, a speaker 10, and a call button 11. The entrance device 12 includes a camera 13 composed of a solid-state imaging device such as a CCD for capturing an image, a call microphone 14, a speaker 15, and a call button 16.

When the visitor presses the call button 16 of the handset 12, the handset 12 is turned on, a chime sounds on the kitchen remote control 2 and the bath remote control 7, and the caller 14 receives a call through the call microphone 14 and the speaker 15. Intercom communication between the device 12 and the kitchen remote controller 2 or the bath remote controller 7 becomes possible. At the same time, the image of the visitor taken by the camera 13 is transmitted, and the kitchen remote controller 2 or the bath remote controller 7 is transmitted.
An image is displayed on the display units 3 and 8.

Alternatively, when the call buttons 6 and 11 of the kitchen remote controller 2 or the bath remote controller 7 are pressed, the entrance
Is turned on, and the call microphones 4, 9 and the speakers 5, 10
The user can make an interphone call with the entrance cordless handset 12 through. Also in this case, at the same time, the image of the entrance taken by the camera 11 is displayed on the display units 3 and 8 of the kitchen remote controller 2 or the bath remote controller 7, and the state of the outdoors can be monitored.
The display unit 3 of the kitchen remote controller 2 and the bath remote controller 7,
8, the operation status or control status of the water heater 1 can be displayed.

FIG. 2 shows the above-described kitchen remote controller 2 and the entrance slave unit 12.
FIG. 2 is a circuit block diagram showing a configuration for controlling transmission of images and sounds during the period. First, an operation of the entrance slave unit 12 will be described. When the call button 16 provided on the entrance device 12 or the like is pressed, the entrance device 12 is turned on and the CC
Pixel signals output from each pixel of the camera 13 including D and the like are sequentially output to the encoder 21 as serial data, and are converted into digital video signals in the encoder 21. That is, a pixel signal output from each pixel of the camera 13 is converted into a digital signal through a process such as quantization by the encoder 21, and further converted from an RGB (red / green / blue) signal of each pixel to a Y (luminance component). ) Signal, I (color difference component) signal, Q (color difference component) signal, or Y signal, Cr
The signal is converted to a Cb signal.

The image data (digital video signal) generated by the encoder 21 is sent to an image compression processing section 22 (a microcomputer chip for image compression processing).
The data is compressed by a predetermined method. As an image compression method,
Although not particularly limited, JPEG and MPEG
(In particular, MPEG4) can be used. Reference numeral 23 denotes a memory for compression operation and storage (SRA).
M).

In the basic method of JPEG, the following processing is performed for each color component. That is, after performing DCT (Discrete Cosine Transform) and quantization, the image is replaced with codes of 0 and 1 by entropy coding to generate a coded signal.
At the beginning of this coded signal, information necessary for decoding such as the size and color type of the image is added as header information, and further, table information used for quantization and entropy coding is added, followed by Huffman coding Followed by compressed data. This encoded signal is transmitted as compressed image data. On the other hand, on the receiving side such as a kitchen remote controller, tables are extracted from the encoded signal, entropy encoding is first performed by referring to the Huffman code table (code table), and then inverse quantization is performed by referring to the quantization table. To obtain the DCT coefficient, and then perform inverse DCT and inverse level shift from the DCT coefficient to determine the brightness of each pixel, and restore the original image.

This JPEG is a method generally used for compressing still images, but moving images can be reproduced on the receiving side by continuously transmitting still images. In addition, JPEG is not limited to the above-described method, but includes various modifications. According to JPEG, progressive coding can be adopted in addition to sequential coding. When the image transmission speed is low, the whole state can be gradually revealed even if it is vague. A moving object can be identified even if the image is blurred, so that the crime prevention effect is enhanced.

MPEG is composed of an intra-frame coded image I, a P image for performing forward prediction, and a B image for performing bidirectional prediction, and is used in a moving image such as a video CD.

The image compression format is JPEG,
In addition to MPEG, the transmitting side sequentially compresses and transmits a plurality of still images, the receiving side sequentially decompresses the compressed data and sequentially displays the still images, and the transmitting side compresses and transmits moving images. A method of sequentially decompressing the compressed data on the receiving side and displaying it as a moving image; a transmitting side compresses and transmits information (differential image data) on a basic still image and data on a change in motion corresponding thereto; A method of sequentially decompressing the compressed data and displaying it as a moving image may be used.

The image data thus compressed is stored in a memory (SRAM) 24 and sent to a parallel / serial converter 25, where the parallel / serial converter 25
Is converted to serial data by the transmission / reception terminal 26
Sent to The transmitting / receiving terminal 26 is a kitchen remote controller 2
Are connected to the transmission / reception terminal 29 by the two-core power line 19. As these transmitting / receiving terminals 26 and 29, devices for home LAN can be used. The image data (serial data) sent to the transmitting / receiving terminal 26 is modulated by QPSK (four-phase modulation) in the transmitting / receiving terminal 26.

Further, voice can be input from a telephone microphone 14 provided in the entrance terminal 12. When a visitor inputs sound from the call microphone 14, the sound signal output from the call microphone 14
After being encoded by a speech encoding method such as DPCM, DPCM, or PCM and converted into digital data, the digital data is input to a transmitting / receiving terminal 26 via a microprocessor 28. The audio digital signal sent to the transmitting / receiving terminal 26 is modulated by QPSK (four-phase modulation) in the transmitting / receiving terminal 26. Although not shown in FIG. 2, when an audio signal is also compressed and transmitted, the signal output from the microprocessor 28 may be input to the image compression processing unit 22 to be compressed. .

The QPSK-modulated image data and the audio digital signal input to the transmission / reception terminal 26 are time-division-processed by the transmission / reception terminal 26, and the time-division multiplexed image data and the audio signal are converted into a two-core power line. It is sent to the transmission / reception terminal 29 through 19.

Next, the operation of the kitchen remote controller 2 will be described. The operation of the kitchen remote controller 2 is basically an operation in the direction opposite to that of the entrance slave unit 12. The image data and the audio signal transmitted to the transmitting / receiving terminal 29 through the two-core power line 19 are separated from each other by the transmitting / receiving terminal 29,
The image data is demodulated to the original serial data before QPSK modulation and sent to the serial / parallel converter 30, and the audio signal is sent to the microprocessor 36.

The image data sent to the serial / parallel converter 30 is converted to parallel data by the serial / parallel converter 30 and then sent to the image expansion processor 31. The image data sent to the image expansion processing unit 31 expands (decompresses) the image data in the same manner as the image compression processing unit 22.
Is done. Reference numeral 32 denotes a memory (SRAM) for compression calculation and storage.

The image data decompressed in this way is stored in a memory (SRAM) 33 while being sent to a decoder 34 where it is restored to the original video signal and output from a video signal output 35. The signal output from the video signal output 35 is displayed as a moving image on the display unit 3 of the kitchen remote controller 2. Also, the water is sent to the bath remote controller 7 through the water heater 1 and displayed on the display unit 8 of the bath remote controller 7 as a moving image.

The audio signal input to the data converter 37 via the microprocessor 36 is
At 7, the signal is demodulated in the same manner as the data conversion unit 27 of the entrance cordless handset 12, is subjected to digital / analog conversion, and is output from the speaker 5 as an analog signal. Although not shown in FIG. 2, when the audio signal is also expanded, the output of the microprocessor 36 is output to the image expansion processing unit 3.
Make 1 input.

Conversely, the voice input from the call microphone 4 of the kitchen remote controller 2 is converted from analog to digital by encoding in the data conversion section 37 by the ADPCM method or the like, and then converted from the transmission / reception terminal 29 to the dual-core. The data is sent to the transmission / reception terminal 26 on the power line 19, is subjected to digital / analog conversion by the data converter 27, and is output from the speaker 15.

In the above embodiment, the modulation method of digital data performed by the transmitting / receiving terminals 26 and 29 is QPSK.
Although the description has been made using the (four-phase modulation) method, other methods such as a π / 4 shift QPSK method may be used.
An SK (phase modulation) method may be used. Further, as another modulation method, an FSK method may be used, and the modulation method can be appropriately selected and used according to various conditions such as a transmission data amount to be used and wiring.

In the above embodiment, the kitchen remote controller 2
Although the description has been given using the example in which the entrance slave unit 12 and the entrance remote unit 12 are connected, the entrance entrance unit 12 and the water heater 1 are connected, and the kitchen remote controller 2 and the bath remote controller 10 are connected via the water heater 1. Alternatively, the entrance remote device 12 and the bath remote controller 10 may be connected to each other, and the kitchen remote controller 2 may be connected thereto via such connection. Such a connection mode may be arbitrarily selected.

In the above embodiment, the case where a wired two-core power line is used between the transmitting and receiving terminals 26 and 29 has been described. However, the transmitting and receiving terminals 26 and 29 are configured by wireless transceivers. The transmission and reception terminals 26 and 29 may be configured wirelessly.

In the above embodiment, JPEG and MPEG have been described as image data compression methods.
The compression method is not limited to these, and a compression method newly appearing in the future may be used.

[0055]

According to the image transmission apparatus of the present invention, the image data is compressed and transmitted by the transmitting apparatus, and the image data is decompressed and displayed by the receiving apparatus. Therefore, the amount of data to be transmitted can be reduced. And image data can be transmitted at high speed.

Among the intercom devices of the present invention, those in which image data is converted into digital data by an outdoor unit and transmitted to the indoor unit, and an image is displayed based on the image digital data sent from the outdoor unit In addition, the transmission signal waveform can be accurately reproduced on the receiving side, the image is less likely to be distorted on the receiving side, and much image noise is not included, and the image on the receiving side, that is, the indoor unit, can be easily viewed.

In the intercom apparatus according to the present invention, the image data is compressed and transmitted by the outdoor unit, and the image data is decompressed and displayed by the indoor unit. Can be transmitted. In particular, in the case of a moving image, a smooth image can be reproduced.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram schematically showing a water heater with a TV camera intercom remote controller according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration for transmitting image data and audio information of an entrance slave and a kitchen remote controller in the embodiment.

[Explanation of symbols]

 2 Kitchen remote control 3 Display unit 4 Call microphone 5 Speaker 12 Entrance cordless handset 13 Camera 14 Call microphone 15 Speaker 19 Two-core power line 21 Encoder 22 Image compression processing unit 26 Transmission / reception terminal 27 Data conversion unit 29 Transmission / reception terminal 31 Image expansion Processing unit 35 Video signal output 37 Data conversion unit

Continued on the front page (72) Inventor Kaoru Yamagami 93 Edo-cho, Chuo-ku, Kobe-shi, Hyogo F-term in Noritz Co., Ltd. 5C054 AA01 CA04 CC02 CD06 DA01 DA08 EA01 EA03 EA05 EB05 EB07 EG01 EG09 EJ05 EJ07 HA22 5K038 AA01 CC02 DD15 DD23 EE13 FF01 5K048 BA03 BA51

Claims (10)

[Claims] 1. An image transmission device for transmitting moving image data from a transmitting device to a receiving device, wherein the transmitting device reads the moving image data, compresses the read moving image data, and generates a compressed moving image. Image transmission, having a function of transmitting image data, wherein the receiving side device has a function of decompressing compressed data relating to the transmitted moving image and displaying the decompressed moving image data on a display unit. apparatus. 2. An intercom apparatus including at least an outdoor unit and an indoor unit, wherein the outdoor unit is configured to capture an image of a visitor, and to convert the image captured by the imaging unit into digital data. And an image data transmission unit for transmitting the converted image digital data to the indoor unit, and an outdoor unit communication unit for exchanging audio information with the indoor unit. An intercom apparatus comprising: an image display means for displaying an image based on image digital data sent from an equipment; and an indoor equipment communication means for communicating voice information with the outdoor equipment. 3. An intercom apparatus including at least an outdoor unit and an indoor unit, wherein the outdoor unit has an imaging unit for capturing an image of a visitor, and a compressed image data obtained by compressing the image captured by the imaging unit. Image data compression means for creating, image data transmission means for transmitting the image data compressed by the image data compression means to the indoor unit, outdoor unit communication means for performing communication of voice information with the indoor unit, The indoor unit is based on image data decompression means for decompressing compressed image data sent from the outdoor unit, and image data decompressed by the image data decompression means sent from the outdoor unit. An intercom apparatus comprising: an image display unit for displaying an image on a mobile phone; and an indoor unit communication unit for communicating voice information with the outdoor unit. 4. The outdoor unit according to claim 1, wherein said image data transmitting unit transmits image digital data for transmission created by compression by said image data compressing unit from said outdoor unit to said indoor unit. The means and the indoor unit communication means perform communication of voice information by transmitting and receiving voice digital data obtained by converting voice data by a voice coding method between the outdoor unit communication means and the indoor unit communication means. The intercom apparatus according to claim 3, wherein: 5. The image data transmitting means transmits image digital data for transmission created by compression by the image data compressing means and modulated by a phase modulation method from the outdoor unit to the indoor unit. The outdoor unit communication means and the indoor unit communication means, the audio data is converted by a voice encoding method, further, the audio digital data modulated by the phase modulation method, outdoor unit communication means and indoor unit communication means, The intercom apparatus according to claim 3, wherein communication of voice information is performed by transmitting and receiving the intercom. 6. An intercom apparatus comprising at least an outdoor unit and an indoor unit, wherein the outdoor unit has an imaging unit for capturing an image of a visitor, and a compressed image data obtained by compressing the image captured by the imaging unit. , An image data transmitting means for transmitting the image data compressed by the image data compressing means to the indoor unit, and an outdoor unit communication for transmitting and receiving voice information between the indoor unit. Means, the indoor unit, the image data decompression means for decompressing the compressed image data sent from the outdoor unit, and the image data sent from the outdoor unit and decompressed by the image data decompression means Image display means for originally displaying an image, and indoor unit communication means for transmitting and receiving audio information to and from the outdoor unit. An intercom apparatus, wherein image data transmission from the outdoor unit to the indoor unit and voice information transmission from the outdoor unit communication unit to the indoor unit communication unit are performed by time division multiplex communication. 7. The compression method used in the image data compression means is a JPEG compression method or an MPEG compression method.
2. The intercom device according to claim 1. 8. The image data compressing means sequentially compresses and transmits a plurality of still images, and the image data decompressing means sequentially decompresses the compressed data and sequentially displays the still images to produce the moving image as a moving image. 7. The intercom apparatus according to claim 3, wherein the intercom apparatus is displayed on an image display unit. 9. The image data compressing means compresses and transmits a moving image, and the image data decompressing means sequentially decompresses the compressed data and displays it as a moving image. 7. The intercom apparatus according to 4, 5, or 6. 10. The image data compressing means compresses and transmits information relating to a basic still image and motion change data corresponding thereto, and the image data decompressing means sequentially decompresses the compressed data as a moving image. The intercom apparatus according to claim 3, 4, 5 or 6, wherein the display is displayed.