JP4515930B2 - TV door phone device - Google Patents

Description

  The present invention relates to a television door phone device, and more particularly to a television door phone device having a function of pre-recording a video of a front door including a video of a visitor captured by a slave unit or pre-recording a moving image.

  Conventionally, an intercom device in which a camera of a child device is always operated has been proposed (for example, see Patent Document 1). This intercom device is a parent device installed indoors and a child device installed at the entrance, etc., and a resident and a visitor make a call and the resident image is captured by the child camera. In this case, the camera of the slave unit always operates, and the master unit stores the received image signal in the image storage unit based on the control of the image signal control unit. The image storage unit is composed of a ring buffer, and a predetermined amount of time is overwritten and stored by the storage capacity of the ring buffer.

  In order to enhance the crime prevention function of the intercom device that operates the camera of the slave unit and records it on the master unit, a pre-recording function is provided to save the recorded image retroactive several seconds before the call button of the slave unit is pressed. There is a case. As this pre-recording function, an image monitoring apparatus that stores images before and after the detection of an abnormality is disclosed (for example, see Patent Document 2). This image monitoring apparatus has an area for storing a predetermined number of images in the image sensor, and an image input from a photographing means for capturing the monitoring area is always stored in the storage area, and the stored image is rewritten. After the image storage means for storing the latest predetermined number of images and the occurrence of abnormality are detected, the image storage means performs image rewriting processing for the number of images corresponding to the type of abnormality. Control means for stopping the rewriting process.

  In this image monitoring device, the image storage means always stores the image input from the imaging means for capturing the monitoring area in the image storage means for storing a predetermined number of images, and when this image storage means is full, Sequentially, an old image is rewritten to a newly input image. In addition, the control means has a pre-recording (retro-recording) function for increasing the number of images before abnormality detection by increasing the timing at which the rewriting process is stopped if there is an emergency report.

JP 2004-208081 A (page 4, FIG. 1) Japanese Patent Laid-Open No. 11-284984 (Pages 2-5, FIGS. 1 and 3)

  However, in the interphone device and the image monitoring device described above, since the image captured by the camera is always stored in the image storage unit or the image storage means, there is a problem that the power consumption increases. In addition, since the images are always stored in the image storage unit and the image storage unit, the life of the image storage unit and the image storage unit is shortened. In particular, when a pre-recording function is provided, pre-recording cannot be performed, leading to a reduction in the security function.

  The present invention has been made to solve such a conventional difficulty, and is a television door phone device that can always pre-record an image storage medium that stores an image captured by a camera without storing the image. The purpose is to provide.

  Another object of the present invention is to provide a television door phone device that can prevent an increase in power consumption even if it has a pre-recording function.

  The TV door phone device of the present invention has a function for causing a video of a child device camera to be displayed on a monitor of the parent device and recording the video as a still image or a moving image. A sensor interface for connecting at least one human body sensor for detecting whether or not a visitor is present in the vicinity of the slave unit, which is built in or external to the slave unit, and for calling the master unit from the slave unit And a call button.

  The main unit of the TV door phone apparatus according to the first aspect is a non-volatile memory for recording video and a visit of the human body sensor, which is obtained from the first trigger, operation of the call button, or the human body sensor. The recording of the video to the non-volatile memory is started by the input of the first trigger, and the second trigger is received within a predetermined time after the input of the first trigger. And a control circuit for erasing the recording when not inputted.

  The slave unit and the master unit of the TV door phone apparatus according to the second aspect are configured to detect the stay of a visitor for a certain period of time obtained from the first trigger, the operation of the call button, or the response of the human body detection sensor. In order to delete the recording when the second trigger is not input within a certain time after the input of the first trigger as the second trigger, the recording of the video to the nonvolatile memory is started by the input of the first trigger. The control circuit is provided.

  The TV door phone apparatus according to the third aspect is a volatile memory for temporarily recording a video and a human body sensor sensor response obtained from a first trigger, a call button operation or a human body sensor sensor response. Recording of the video into the volatile memory is started by the input of the first trigger, and the second trigger is input within a predetermined time after the input of the first trigger. If not, a control circuit for erasing the recording, and a non-volatile memory for recording the video by transferring the video recorded in the volatile memory by the second trigger input under the control of the control circuit.

  According to such a television door phone device, pre-recording can be started after sensing the presence of a human body in the vicinity of the slave by the first trigger. It is not necessary to always record images in the memory. If the second trigger is input within a certain period of time after the first trigger is input, recording continues on the image storage medium. If not, the video recorded on the image storage medium is displayed. Since the data is erased, the life of the image storage medium can be improved without reducing the security function.

  According to the television door phone device of the present invention, it is possible to always perform pre-recording in a non-volatile memory or a volatile memory for storing an image captured by the camera without saving the image, and to have a pre-recording function. However, an increase in power consumption can be prevented. Therefore, it is possible to improve the lifetime of the nonvolatile memory or the volatile memory without deteriorating the crime prevention function, and it is possible to prevent the image storage medium from being abnormal and causing a writing failure.

  Hereinafter, preferred embodiments of the television door phone device of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, a television door phone apparatus according to a preferred embodiment of the present invention is installed outside a doorway or the like, and is connected to the slave unit 10 and indoors. And a parent device 20 having a camera recording function for recording an image captured by the camera 101 of the child device 10 and a playback function for reproducing the recorded image on the monitor 201. Data transmission / reception between them is performed by digital signals.

  The handset 10 has a call button 102 for notifying the base unit 20 of a visitor, a handset speaker 103 and handset microphone 104 for communicating with the base unit 20, and that a human body exists in the vicinity of the handset. And a human body sensor 105 for sensing. The human body detection sensor 105 may be incorporated in the child device 10 or externally attached in the vicinity of the child device 10, or may be installed in both in order to enhance the crime prevention effect. When the human body sensor 105 is externally attached, a sensor interface 106 is provided so that at least one human body sensor 105 can be connected to the slave unit 10.

  Further, the slave unit 10 includes a speaker amplifier 107 that amplifies an audio signal from the master unit 20 to be described later, a microphone amplifier 108 that amplifies an audio signal from the slave unit microphone 104, and a digital audio signal transmitted from the master unit 20. Is converted into an analog audio signal, and the audio codec 109 that converts the analog audio signal from the handset microphone 104 amplified by the microphone amplifier 108 into a digital audio signal, and the video signal from the camera 101 are converted into digital compressed image data. A compression circuit 110 for conversion; a volatile memory 111 for temporarily storing digital compressed image data transmitted from the compression circuit 110; and a digital compressed image data temporarily stored in the volatile memory 111 for transferring the compressed data for a long time A rewritable nonvolatile memory 112 for storing data and various digital data packets. A packet processing circuit 113 of a communication circuit 114 for transmitting and receiving packet data, and a control circuit 115 for controlling each component of the by the slave unit 10 configured of a CPU. The volatile memory 111 is preferably a DRAM (Dynamic Random Access Memory) or the like, and the nonvolatile memory 112 is preferably an EPROM (Erasable Programmable Read Only Memory) or a flash memory.

  The camera 101 of the child device 10 is connected to the compression circuit 110, the compression circuit 110 is connected to the packet processing circuit 113, the nonvolatile memory 112, and the control circuit 115, and the call button 102 and the built-in human body sensor 105 are The handset speaker 103 is connected to the audio codec 109 via the speaker amplifier 107, the handset microphone 104 is connected to the audio codec 109 via the microphone amplifier 108, and the audio codec 109 is connected to the packet processing circuit 113. . The external human body sensor 105 is connected to the control circuit 115 via the sensor interface 106. Further, the volatile memory 111, the nonvolatile memory 112, and the camera 101 are connected to the control circuit 115, respectively. The control circuit 115 is connected to the packet processing circuit 113, and the packet processing circuit 113 is connected to the communication circuit 114 for wired connection to the parent device 20.

  The base unit 20 monitors a base unit speaker 202 and a base unit microphone 203 for making a call with the handset 10, a call button 204 for making a call and an end call with a visitor, and a recorded video of the visitor. A playback button 205 for displaying on the screen 201 is provided. The master unit 20 also converts the speaker amplifier 206 that amplifies the audio signal from the slave unit 10, the microphone amplifier 207 that amplifies the audio signal from the master unit microphone 203, and the digital audio signal transmitted from the slave unit 10 into analog form. An audio codec 208 that converts the audio signal into an audio signal, converts the analog audio signal from the parent microphone 203 amplified by the microphone amplifier 207 into a digital audio signal, and decompresses the digital compressed image data transmitted from the child device 10 The decompression circuit 209, the volatile memory 210 for temporarily storing the digital compressed image data transmitted from the slave unit 10, and the digital compressed image data temporarily stored in the volatile memory 210 are transferred. A rewritable nonvolatile memory 211 and a packet processing circuit for packetizing various digital data 12, a communication circuit 213 that transmits and receives packet data, a control circuit 214 that is configured by a CPU and controls each part of the base unit 20, and video data stored in the volatile memory 210 is controlled by the control circuit 214. And a monitor control circuit 215 that outputs an image on the monitor 201. Note that a DRAM or the like is preferable as the volatile memory 210, and an EPROM or a flash memory is preferable as the nonvolatile memory 211, respectively.

  The monitor 201 of the parent device 20 is connected to the monitor control circuit 215, the monitor control circuit 215 is connected to the expansion circuit 209 and the control circuit 214, the parent device speaker 202 is the speaker amplifier 206, and the parent device microphone 203 is the microphone. Each is connected to an audio codec 208 via an amplifier 207, and the audio codec 208 is connected to a packet processing circuit 212. Further, the call button 204, the play button 205, the volatile memory 210, and the nonvolatile memory 211 are connected to the control circuit 214, respectively. The control circuit 214 is connected to the audio codec 208, the decompression circuit 209, and the packet processing circuit 212. The packet processing circuit 212 is connected to a communication circuit 213 for wired connection to the slave unit 10.

  The control circuit 115 of the child device 10 and the control circuit 214 of the parent device 20 of the television doorphone device configured as described above have six types of control functions for recording a still image or a moving image.

  The first control function uses the response of the human body sensor 105 as a first trigger, and the visitor staying for a certain period of time obtained from the operation of the call button 102 as a second trigger. In the control function of starting the recording of the video from the camera 101 of the slave unit 10 to the non-volatile memory 211, and deleting the recording when the second trigger is not input within a certain time after the input of the first trigger, The control circuit 214 of the parent device 20 has. The second trigger may be a stay of a visitor for a certain period of time obtained from the reaction of the human body sensor 105.

  The second control function uses the response of the human body detection sensor 105 as a first trigger, and the visitor staying for a certain period of time obtained from the operation of the call button 102 as a second trigger. In the control function of starting the recording of the video from the camera 101 of the slave unit 10 to the non-volatile memory 112, and deleting the recording when the second trigger is not input within a certain time after the input of the first trigger, The control circuit 115 of the child device 10 and the control circuit 214 of the parent device 20 are included. Note that, as in the first control function, the second trigger may be a stay of a visitor for a certain period of time obtained from the reaction of the human body sensor 105.

  The third control function uses the response of the human body sensor 105 as a first trigger, and the visitor staying for a certain period of time obtained from the operation of the call button 102 as a second trigger. 20 starts recording video from the camera 101 of the slave unit 10 in the volatile memory 210, erases the recording when the second trigger is not input within a certain time after the input of the first trigger, and When the second trigger is input within a certain time after the input of the first trigger, the video recorded in the volatile memory 210 of the parent device 20 by the second trigger input is the non-volatile of the parent device 20. The control circuit 115 of the slave unit 10 and the control circuit 214 of the master unit 20 have a control function of recording the video transferred to the memory 211. Note that, as in the first control function, the second trigger may be a stay of a visitor for a certain period of time obtained from the reaction of the human body sensor 105.

  The fourth control function uses the response of the human body detection sensor 105 as a first trigger and the visitor staying for a certain period of time obtained from the operation of the call button 102 as a second trigger. 10 starts recording the video from the camera 101 of the slave unit 10 in the volatile memory 111, erases the recording when the second trigger is not input within a certain time after the input of the first trigger, When the second trigger is input within a certain time after the input of the first trigger, the video recorded in the volatile memory 111 of the slave unit 10 by the second trigger input is the non-volatile of the master unit 20 The control circuit 115 of the slave unit 10 and the control circuit 214 of the master unit 20 have a control function of recording the video transferred to the memory 211. Note that, as in the third control function, the second trigger may be a stay of a visitor for a certain period of time obtained from the reaction of the human body sensor 105.

  The fifth control function uses the response of the human body detection sensor 105 as a first trigger, and the visitor staying for a certain period of time obtained from the operation of the call button 102 as a second trigger. 10 starts recording the video from the camera 101 of the slave unit 10 in the volatile memory 111, erases the recording when the second trigger is not input within a certain time after the input of the first trigger, When the second trigger is input within a certain time after the input of the first trigger, the video recorded in the volatile memory 111 of the slave unit 10 by the second trigger input is the non-volatile of the slave unit 10. The control circuit 115 of the slave unit 10 and the control circuit 214 of the master unit 20 have a control function of recording the video transferred to the memory 112. Note that, as in the third control function, the second trigger may be a stay of a visitor for a certain period of time obtained from the reaction of the human body sensor 105.

  The sixth control function uses the response of the human body sensor 105 as a first trigger, and the visitor staying for a certain period of time obtained from the operation of the call button 102 as a second trigger. 20 starts recording video from the camera 101 of the slave unit 10 in the volatile memory 210, erases the recording when the second trigger is not input within a certain time after the input of the first trigger, and When the second trigger is input within a certain time after the input of the first trigger, the video recorded in the volatile memory 210 of the parent device 20 by the second trigger input is the non-volatile of the child device 10. The control circuit 115 of the slave unit 10 and the control circuit 214 of the master unit 20 have a control function of recording the video transferred to the memory 112. Note that, as in the third control function, the second trigger may be a stay of a visitor for a certain period of time obtained from the reaction of the human body sensor 105.

Next, the recording state by each control function will be described below.
[Example 1]
First, a case where the control circuit 115 of the child device 10 and the control circuit 214 of the parent device 20 are set to the first control function will be described. This first control function assumes that the visitor stays for a certain period of time obtained from the operation of the call button 102 as a second trigger. Further, it is assumed that the human body detection sensor 105 is built in the slave unit 10.

  When the human body detection sensor 105 detects a human body, a human body detection signal from the human body detection sensor 105 is transmitted to the packet processing circuit 113 via the control circuit 115. The packet processing circuit 113 packetizes the human body sensing signal and transmits it to the packet processing circuit 212 via the communication circuit 114 → the communication circuit 213 of the parent device 20. The packet processing circuit 212 separates the human body sensing signal from the packet data and transmits it to the control circuit 214. When receiving the human body detection signal, the control circuit 214 of the parent device 20 transmits a control signal for driving the camera 101 of the child device 10 to the packet processing circuit 212 using this signal as a first trigger based on the first control function. To do. The packet processing circuit 212 packetizes the control signal and transmits it to the packet processing circuit 113 via the communication circuit 213 → the communication circuit 114 of the slave unit 10. The packet processing circuit 113 separates the control signal from the packet data and transmits it to the control circuit 115. Since the control circuit 115 of the child device 10 drives the camera 101 based on this control signal, imaging is started. When the control circuit 115 of the child device 10 receives the human body sensing signal, the control circuit 115 monitors whether the call signal from the call button 102 of the child device 10 is received within a predetermined time by the internal timer based on the first control function. .

  The camera 101 of the slave unit 10 converts the captured video signal into digitally compressed image data by the compression circuit 101 and transmits it to the packet processing circuit 113. The packet processing circuit 113 packetizes the digital compressed image data and transmits it to the packet processing circuit 212 via the communication circuit 114 → the communication circuit 213 of the parent device 20. The packet processing circuit 212 separates the digital compressed image data from the packet data and transmits it to the control circuit 214. The control circuit 214 stores the digital compressed image data in the nonvolatile memory 211. The non-volatile memory 211 has a capacity capable of storing a plurality of image data in units of frames, and as shown in FIG. 2A, the digital image of the image from the camera 101 of the slave unit 10 when the human body sensor 101 reacts. Assuming that the compressed image data is an image n, the control circuit 214 stores the image n in the area 1 of the nonvolatile memory 211, and subsequently stores the image n + 1 in the area 2 when the image n + 1 is input. When an image n + 2 is further input, it is accumulated in the area 3. These operations are repeated each time new digital compressed image data is input. Since the image data is not overwritten, the capacity of the image data to be stored is limited, but the storage capacity necessary for pre-recording is secured.

  In this state, when a visitor calls the call button 102 of the child device 10, a call signal from the call button 102 is transmitted to the control circuit 115. The control circuit 115 recognizes this calling signal as the second trigger, and transmits the stay signal to the packet processing circuit 113 when the second trigger is input within a certain time after the input of the first trigger. To do. The packet processing circuit 113 packetizes the stay signal and transmits it to the packet processing circuit 212 via the communication circuit 114 → the communication circuit 213 of the parent device 20. The packet processing circuit 212 separates the stay signal from the packet data and transmits it to the control circuit 214. Based on the stay signal, the control circuit 214 stores the digital compressed image data of the video from the camera 101 of the slave unit 10 in the nonvolatile memory 211 and the decompression circuit 209 in the order in which the stored digital compressed image data is stored. Output to. The decompression circuit 209 decompresses the digital compressed image data and temporarily stores it in the volatile memory 210, and the control circuit 214 transmits the digital image data temporarily stored in the volatile memory 210 to the monitor control circuit 215. The video of the visitor is displayed on the monitor 201.

  Further, since the control circuit 214 of the parent device 20 transmits an audio signal for causing the speaker 202 to ring based on the calling signal from the child device 10 to the speaker amplifier 206 via the audio codec 208, the calling signal from the parent device speaker 202 is transmitted. Sound can be sounded. When a resident operates a call with the call button 204 of the parent device 20 in order to respond to the call of the visitor, the child device microphone 104 and the child device speaker 103 of the child device 10, and the parent device microphone 203 and the parent device 20 of the parent device 20. The machine speaker 202 establishes a call between a visitor and a resident. When the resident ends the call with the call button 204 in order to end the call, a visit is made by the handset microphone 104 and handset speaker 103 of the handset 10 and by the handset microphone 203 and base phone speaker 202 of the base unit 20. The call state between the person and the resident is released. At this time, the digital compressed image data stored in the nonvolatile memory 211 of the parent device 20 remains stored.

  If the second trigger is not input within a certain time after the input of the first trigger, the control circuit 214 of the base unit 20 stops storing the digital compressed image data in the nonvolatile memory 211. Then, all the digital compressed image data stored in the nonvolatile memory 211 is erased.

  When playing back the recorded video stored in the nonvolatile memory 211, the playback button 205 is played back. When the playback button 205 is played back, a playback signal from the playback button 205 is transmitted to the control circuit 214. Based on this reproduction signal, the control circuit 214 outputs the digital compressed image data stored in the nonvolatile memory 211 to the decompression circuit 209 in the order of storage. The decompression circuit 209 decompresses the digital compressed image data and temporarily stores it in the volatile memory 210, and the control circuit 214 transmits the digital image data temporarily stored in the volatile memory 210 to the monitor control circuit 215. The video of the visitor is displayed on the monitor 201. Here, the projected image is an image captured by the camera 101 of the handset 10 from when the human body sensor 101 reacts until the call ends.

  In this way, by setting the first control function in the control circuit 115 of the child device 10 and the control circuit 214 of the parent device 20, the image of the front door including the image of the visitor captured by the camera 101 of the child device 10 Can be recorded in the non-volatile memory 211 of the base unit 20 that always stores a still image and a video.

In addition, the second trigger is the call signal from the call button 102 of the child device 10, but the present invention is not limited to this, and the visitor may stay for a certain period of time obtained from the reaction of the human body sensor 105. In this case, when the control circuit 115 of the child device 10 receives the human body detection signal, the internal timer of the control circuit 115 monitors whether the human body detection signal is continuously received for a predetermined time. If it is received for a certain time or longer, the control circuit 115 transmits a stay signal to the packet processing circuit 113 for transmission to the control circuit 214 of the parent device 20. The packet processing circuit 113 packetizes the stay signal and transmits it to the packet processing circuit 212 via the communication circuit 114 → the communication circuit 213 of the parent device 20. The packet processing circuit 212 separates the stay signal from the packet data and transmits it to the control circuit 214. When receiving the stay signal, the control circuit 214 of the master unit 20 stores the digital compressed image data of the video from the camera 101 of the slave unit 10 in the nonvolatile memory 211 based on the first control function, and the stored digital The compressed image data is output to the decompression circuit 209 in the order of accumulation. The decompression circuit 209 decompresses the digital compressed image data and temporarily stores it in the volatile memory 210, and the control circuit 214 transmits the digital image data temporarily stored in the volatile memory 210 to the monitor control circuit 215. The video of the visitor is displayed on the monitor 201. If the internal timer of the control circuit 115 cannot measure the retention of the human body sensing signal for a certain period of time, a recording erasure signal is transmitted to the packet processing circuit 113 for transmission to the control circuit 214 of the parent device 20. The packet processing circuit 113 packetizes the recording erasure signal and transmits it to the packet processing circuit 212 via the communication circuit 114 → the communication circuit 213 of the parent device 20. The packet processing circuit 212 separates the recording erasure signal from the packet data and transmits it to the control circuit 214. When receiving the recording erasure signal, the control circuit 214 of the base unit 20 stops the storage of the digital compressed image data in the nonvolatile memory 211 based on the first control function, and the digital stored in the nonvolatile memory 211 Delete all compressed image data.
[Example 2]
Next, a case where the control circuit 115 of the child device 10 and the control circuit 214 of the parent device 20 are set to the second control function will be described. Similar to the first control function, this second control function is based on the stay of a visitor for a certain period of time obtained from the operation of the call button 102 as a second trigger. Further, it is assumed that the human body detection sensor 105 is built in the slave unit 10.

  When the human body detection sensor 105 detects a human body, a human body detection signal from the human body detection sensor 105 is transmitted to the control circuit 115. When receiving the human body detection signal, the control circuit 115 drives the camera 101 based on the second control function, so that imaging is started. When the control circuit 115 receives the human body detection signal, the control circuit 115 monitors whether the call signal from the call button 102 is received within a predetermined time by an internal timer based on the second control function.

  The camera 101 of the slave unit 10 converts the captured video signal into digital compressed image data by the compression circuit 110. The compression circuit 110 stores the digital compressed image data in the nonvolatile memory 112 based on the second control function of the control circuit 115. This non-volatile memory 112 has a capacity capable of storing a plurality of image data in units of frames, and as shown in FIG. 2B, the digital image of the image from the camera 101 of the slave unit 10 when the human body sensor 101 reacts. Assuming that the compressed image data is an image n, the control circuit 115 stores the image n in the area 1 of the non-volatile memory 112, and subsequently stores the image n + 1 in the area 2 when the image n + 1 is input. When an image n + 2 is further input, it is accumulated in the area 3. These operations are repeated each time new digital compressed image data is input. Since the image data is not overwritten, the capacity of the image data to be stored is limited, but the storage capacity necessary for pre-recording is secured.

  In this state, when a visitor presses the call button 102 of the child device 10, a call signal from the call button 102 is transmitted to the control circuit 115. The control circuit 115 recognizes this calling signal as the second trigger, and transmits the stay signal to the packet processing circuit 113 when the second trigger is input within a certain time after the input of the first trigger. To do. The packet processing circuit 113 packetizes the stay signal and transmits it to the packet processing circuit 212 via the communication circuit 114 → the communication circuit 213 of the parent device 20. The packet processing circuit 212 separates the stay signal from the packet data and transmits it to the control circuit 214. Based on the stay signal, the control circuit 214 transmits a control signal for continuously storing the digital compressed image data of the video from the camera 101 in the nonvolatile memory 112 to the control circuit 115 of the slave unit 10 and the stored digital compression. A control signal to be transmitted to the expansion circuit 209 of the parent device 20 is transmitted to the control circuit 115 of the child device 10 in the order in which the image data is stored. Based on this control signal, the control circuit 115 of the child device 10 transmits the digital compressed image data stored in the nonvolatile memory 112 to the packet processing circuit 113 in the order of storage. The packet processing circuit 113 packetizes this digital compressed image data and transmits it to the packet processing circuit 212 via the communication circuit 114 → the communication circuit 213 of the parent device 20. The packet processing circuit 212 separates the digital compressed image data from the packet data and transmits it to the control circuit 214. The control circuit 214 outputs the digital compressed image data to the decompression circuit 209 in the order stored in the nonvolatile memory 112 of the slave unit 10. The decompression circuit 209 decompresses the digital compressed image data and temporarily stores it in the volatile memory 210, and the control circuit 214 transmits the digital image data temporarily stored in the volatile memory 210 to the monitor control circuit 215. The video of the visitor is displayed on the monitor 201.

  Further, since the control circuit 214 of the parent device 20 transmits an audio signal for causing the speaker 202 to ring based on the calling signal from the child device 10 to the speaker amplifier 206 via the audio codec 208, the calling signal from the parent device speaker 202 is transmitted. Sound can be sounded. When a resident operates a call with the call button 204 of the parent device 20 in order to respond to the call of the visitor, the child device microphone 104 and the child device speaker 103 of the child device 10, and the parent device microphone 203 and the parent device 20 of the parent device 20. The machine speaker 202 establishes a call between a visitor and a resident. When the resident ends the call with the call button 204 in order to end the call, a visit is made by the handset microphone 104 and handset speaker 103 of the handset 10 and by the handset microphone 203 and base phone speaker 202 of the base unit 20. The call state between the person and the resident is released. At this time, the digital compressed image data stored in the non-volatile memory 112 of the child device 10 remains stored.

  When the second trigger is not input within a certain time after the first trigger is input, the control circuit 115 of the slave unit 10 stops storing the digital compressed image data in the nonvolatile memory 112. Then, all the digital compressed image data stored in the nonvolatile memory 112 is erased.

  Further, when the recorded video stored in the non-volatile memory 112 of the child device 10 is played back, the playback button 205 is played back. When the playback button 205 is played back, a playback signal from the playback button 205 is transmitted to the control circuit 214. Based on the reproduction signal, the control circuit 214 transmits a control signal that causes the decompression circuit 209 of the parent device 20 to transmit the digital compressed image data stored in the nonvolatile memory 112 of the child device 10 in the order of accumulation. Based on this control signal, the control circuit 115 of the child device 10 transmits the digital compressed image data stored in the nonvolatile memory 112 to the packet processing circuit 113 in the order in which they are stored. The packet processing circuit 113 packetizes this digital compressed image data and transmits it to the packet processing circuit 212 via the communication circuit 114 → the communication circuit 213 of the parent device 20. The packet processing circuit 212 separates the digital compressed image data from the packet data and transmits it to the control circuit 214. The control circuit 214 outputs the digital compressed image data to the decompression circuit 209 in the order stored in the nonvolatile memory 112 of the slave unit 10. The decompression circuit 209 decompresses the digital compressed image data and temporarily stores it in the volatile memory 210, and the control circuit 214 transmits the digital image data temporarily stored in the volatile memory 210 to the monitor control circuit 215. The video of the visitor is displayed on the monitor 201. Here, the projected image is an image captured by the camera 101 of the handset 10 from when the human body sensor 101 reacts until the call ends.

  In this way, by setting the second control function in the control circuit 115 of the child device 10 and the control circuit 214 of the parent device 20, the image of the front door including the image of the visitor captured by the camera 101 of the child device 10 Can be recorded in the non-volatile memory 115 of the handset 10 that always stores still image pre-recording and moving image pre-recording without storing the image.

In addition, the second trigger is the call signal from the call button 102 of the child device 10, but the present invention is not limited to this, and the visitor may stay for a certain period of time obtained from the reaction of the human body sensor 105. In this case, when the control circuit 115 of the child device 10 receives the human body detection signal, the internal timer of the control circuit 115 monitors whether the human body detection signal is continuously received for a predetermined time. If it is received for a certain time or longer, the control circuit 115 transmits a stay signal to the packet processing circuit 113 for transmission to the control circuit 214 of the parent device 20. The packet processing circuit 113 packetizes the stay signal and transmits it to the packet processing circuit 212 via the communication circuit 114 → the communication circuit 213 of the parent device 20. The packet processing circuit 212 separates the stay signal from the packet data and transmits it to the control circuit 214. When the control circuit 214 of the master unit 20 receives the stay signal, the control signal for continuously storing the digital compressed image data of the video from the camera 101 in the control circuit 115 of the slave unit 10 based on the second control function. And a control signal for transmitting the stored digital compressed image data to the expansion circuit 209 of the parent device 20 in the order of storage is transmitted to the control circuit 115 of the child device 10. Based on this control signal, the control circuit 115 of the child device 10 transmits the digital compressed image data stored in the nonvolatile memory 112 to the packet processing circuit 113 in the order of storage. The packet processing circuit 113 packetizes this digital compressed image data and transmits it to the packet processing circuit 212 via the communication circuit 114 → the communication circuit 213 of the parent device 20. The packet processing circuit 212 separates the digital compressed image data from the packet data and transmits it to the control circuit 214. The control circuit 214 outputs the digital compressed image data to the decompression circuit 209 in the order stored in the nonvolatile memory 112 of the slave unit 10. The decompression circuit 209 decompresses the digital compressed image data and temporarily stores it in the volatile memory 210, and the control circuit 214 transmits the digital image data temporarily stored in the volatile memory 210 to the monitor control circuit 215. The video of the visitor is displayed on the monitor 201. Further, when the internal timer of the control circuit 115 cannot measure the retention of the human body detection signal for a certain period of time, the storage of the digital compressed image data in the nonvolatile memory 112 is stopped based on the second control function of the control circuit 115. Then, all the digital compressed image data stored in the nonvolatile memory 112 is erased.
[Example 3]
Next, a case where the control circuit 115 of the child device 10 and the control circuit 214 of the parent device 20 are set to the third control function will be described. Similar to the first control function, this third control function is based on a visitor staying for a certain period of time obtained from the operation of the call button 102 as a second trigger. Further, it is assumed that the human body detection sensor 105 is built in the slave unit 10.

  When the human body detection sensor 105 detects a human body, a human body detection signal from the human body detection sensor 105 is transmitted to the packet processing circuit 113 via the control circuit 115. The packet processing circuit 113 packetizes the human body sensing signal and transmits it to the packet processing circuit 212 via the communication circuit 114 → the communication circuit 213 of the parent device 20. The packet processing circuit 212 separates the human body sensing signal from the packet data and transmits it to the control circuit 214. When receiving the human body detection signal, the control circuit 214 of the parent device 20 transmits a control signal for driving the camera 101 of the child device 10 to the packet processing circuit 212 using this signal as a first trigger based on the third control function. To do. The packet processing circuit 212 packetizes the control signal and transmits it to the packet processing circuit 113 via the communication circuit 213 → the communication circuit 114 of the slave unit 10. The packet processing circuit 113 separates the control signal from the packet data and transmits it to the control circuit 115. Since the control circuit 115 of the child device 10 drives the camera 101 based on this control signal, imaging is started. When the control circuit 115 of the child device 10 receives the human body detection signal, it monitors whether the call signal from the call button 102 of the child device 10 is received within a predetermined time by the internal timer based on the third control function. .

  The camera 101 of the slave unit 10 converts the captured video signal into digitally compressed image data by the compression circuit 101 and transmits it to the packet processing circuit 113. The packet processing circuit 113 packetizes the digital compressed image data and transmits it to the packet processing circuit 212 via the communication circuit 114 → the communication circuit 213 of the parent device 20. The packet processing circuit 212 separates the digital compressed image data from the packet data and transmits it to the control circuit 214. The control circuit 214 stores the digital compressed image data in the volatile memory 210. This volatile memory 210 has a capacity capable of storing a plurality of image data in units of frames, and as shown in FIG. 2C, the digital image of the video from the camera 101 of the slave unit 10 when the human body sensor 101 reacts. Assuming that the compressed image data is an image n, the control circuit 214 stores the image n in the area 1 of the volatile memory 210, and subsequently stores the image n + 1 in the area 2 when the image n + 1 is input. When an image n + 2 is further input, it is accumulated in the area 3. This accumulation operation is repeated, and when an image n + 29 is input, it is accumulated in the area 30. Here, for example, when the image n + 30 is input, the process returns to the area 1 and the accumulated image of the image n is overwritten and accumulated. The volatile memory 210 is of an overwrite type that repeats these storage operations every time new image data is input, but has a storage capacity necessary for pre-recording.

  In this state, when a visitor calls the call button 102 of the child device 10, a call signal from the call button 102 is transmitted to the control circuit 115. The control circuit 115 recognizes this calling signal as the second trigger, and transmits the stay signal to the packet processing circuit 113 when the second trigger is input within a certain time after the input of the first trigger. To do. The packet processing circuit 113 packetizes the stay signal and transmits it to the packet processing circuit 212 via the communication circuit 114 → the communication circuit 213 of the parent device 20. The packet processing circuit 212 separates the stay signal from the packet data and transmits it to the control circuit 214. Based on this stay signal, the control circuit 214 stores the digital compressed image data of the video from the camera 101 of the slave unit 10 in the volatile memory 210 and the decompression circuit 209 in the order in which the stored digital compressed image data is stored. Output to. The decompression circuit 209 decompresses the digital compressed image data and temporarily stores it in the volatile memory 210, and the control circuit 214 transmits the digital image data temporarily stored in the volatile memory 210 to the monitor control circuit 215. The video of the visitor is displayed on the monitor 201. In order to temporarily store the image data expanded by the expansion circuit 209 in the volatile memory 210, the area 1 to the area 30 can be overwritten, or if another area exists, it is stored there. Or you may.

  Further, the non-volatile memory 211 is used for recording and reproduction. Based on the third control function of the control circuit 214 of the parent device 20, the digital compression image data stored in the volatile memory 210 is the oldest digital compression. The image data is transferred in order. As shown in FIG. 2 (c), the non-volatile memory 211 is traced back to a predetermined area of the volatile memory 210 that is necessary for pre-recording by the control circuit 214 when the second trigger is input. The image m of the area is stored in the area A. When the image m + 1 is subsequently input, it is stored in the area B, and when the image m + 2 is further input, it is stored in the area C. These accumulation operations are repeated each time new digital compressed image data is input.

  Further, since the control circuit 214 of the parent device 20 transmits an audio signal for causing the speaker 202 to ring based on the calling signal from the child device 10 to the speaker amplifier 206 via the audio codec 208, the calling signal from the parent device speaker 202 is transmitted. Sound can be sounded. When a resident operates a call with the call button 204 of the parent device 20 in order to respond to the call of the visitor, the child device microphone 104 and the child device speaker 103 of the child device 10, and the parent device microphone 203 and the parent device 20 of the parent device 20. The machine speaker 202 establishes a call between a visitor and a resident. When the resident ends the call with the call button 204 in order to end the call, a visit is made by the handset microphone 104 and handset speaker 103 of the handset 10 and by the handset microphone 203 and base phone speaker 202 of the base unit 20. The call state between the person and the resident is released. At this time, the digital compressed image data stored in the nonvolatile memory 211 of the parent device 20 remains stored.

  If the second trigger is not input within a certain time after the input of the first trigger, the control circuit 214 of the base unit 20 stops storing the digital compressed image data in the volatile memory 210. Then, all the digital compressed image data stored in the volatile memory 210 is erased.

  When playing back recorded video stored in the nonvolatile memory 211, the playback button 205 is played back. When the playback button 205 is played back, a playback signal from the playback button 205 is transmitted to the control circuit 214. Based on this reproduction signal, the control circuit 214 outputs the digital compressed image data stored in the nonvolatile memory 211 for reproduction to the decompression circuit 209 in the order of accumulation. The decompression circuit 209 decompresses the digital compressed image data and temporarily stores it in the volatile memory 210, and the control circuit 214 transmits the digital image data temporarily stored in the volatile memory 210 to the monitor control circuit 215. The video of the visitor is displayed on the monitor 201. Here, the projected image is an image captured by the camera 101 of the handset 10 from when the human body sensor 101 reacts until the call ends.

  In this way, by setting the third control function in the control circuit 115 of the child device 10 and the control circuit 214 of the parent device 20, the image of the front door including the image of the visitor captured by the camera 101 of the child device 10 Can be recorded in the volatile memory 210 or the non-volatile memory 211 of the parent device 20 without any image being stored at all times.

  In addition, the second trigger is the call signal from the call button 102 of the child device 10, but the present invention is not limited to this, and the visitor may stay for a certain period of time obtained from the reaction of the human body sensor 105. In this case, when the control circuit 115 of the child device 10 receives the human body detection signal, the internal timer of the control circuit 115 monitors whether the human body detection signal is continuously received for a predetermined time. If it is received for a certain time or longer, the control circuit 115 transmits a stay signal to the packet processing circuit 113 for transmission to the control circuit 214 of the parent device 20. The packet processing circuit 113 packetizes the stay signal and transmits it to the packet processing circuit 212 via the communication circuit 114 → the communication circuit 213 of the parent device 20. The packet processing circuit 212 separates the stay signal from the packet data and transmits it to the control circuit 214. When receiving the stay signal, the control circuit 214 of the master unit 20 stores the digital compressed image data of the video from the camera 101 of the slave unit 10 in the volatile memory 210 based on the third control function, and the stored digital The compressed image data is output to the decompression circuit 209 in the order of accumulation. The decompression circuit 209 decompresses the digital compressed image data and temporarily stores it in the volatile memory 210, and the control circuit 214 transmits the digital image data temporarily stored in the volatile memory 210 to the monitor control circuit 215. The video of the visitor is displayed on the monitor 201. Further, for recording and reproduction, based on the third control function of the control circuit 214 of the parent device 20, the non-volatile memory 211 sequentially stores the digital compressed image data stored in the volatile memory 210 from the oldest digital compressed image data. Forwarded to

If the internal timer of the control circuit 115 cannot measure the retention of the human body sensing signal for a certain period of time, a recording erasure signal is transmitted to the packet processing circuit 113 for transmission to the control circuit 214 of the parent device 20. The packet processing circuit 113 packetizes the recording erasure signal and transmits it to the packet processing circuit 212 via the communication circuit 114 → the communication circuit 213 of the parent device 20. The packet processing circuit 212 separates the recording erasure signal from the packet data and transmits it to the control circuit 214. When receiving the recording erasure signal, the control circuit 214 of the master unit 20 stops the storage of the digital compressed image data in the nonvolatile memory 211 or the volatile memory 210 based on the third control function. All the digital compressed image data stored in the memory 210 is erased.
[Example 4]
Next, a case where the control circuit 115 of the child device 10 and the control circuit 214 of the parent device 20 are set to the fourth control function will be described. Similar to the first control function, the fourth control function is assumed to use a visitor staying for a certain period of time obtained from the operation of the call button 102 as a second trigger. Further, it is assumed that the human body detection sensor 105 is built in the slave unit 10.

  When the human body detection sensor 105 detects a human body, a human body detection signal from the human body detection sensor 105 is transmitted to the control circuit 115. When receiving the human body detection signal, the control circuit 115 drives the camera 101 based on the fourth control function, so that imaging is started. Further, when receiving the human body detection signal, the control circuit 115 monitors whether the call signal from the call button 102 is received within a predetermined time by an internal timer based on the fourth control function.

  The camera 101 of the slave unit 10 converts the captured video signal into digital compressed image data by the compression circuit 110. The compression circuit 110 stores the digital compressed image data in the volatile memory 111 based on the fourth control function of the control circuit 115. The volatile memory 111 has a capacity capable of storing a plurality of image data in units of frames. As shown in FIG. 2D, the digital image of the video from the camera 101 of the slave unit 10 when the human body sensor 101 reacts. Assuming that the compressed image data is an image n, the control circuit 115 accumulates the image n in the area 1 of the volatile memory 111, and subsequently accumulates the image n + 1 in the area 2 when the image n + 1 is input. When an image n + 2 is further input, it is accumulated in the area 3. This accumulation operation is repeated, and when an image n + 29 is input, it is accumulated in the area 30. Here, for example, when the image n + 30 is input, the process returns to the area 1 and the accumulated image of the image n is overwritten and accumulated. The volatile memory 111 is of an overwrite type that repeats these storage operations every time new image data is input, but has a storage capacity necessary for pre-recording.

  In this state, when a visitor calls the call button 102 of the child device 10, a call signal from the call button 102 is transmitted to the control circuit 115. The control circuit 115 recognizes this calling signal as the second trigger, and transmits the stay signal to the packet processing circuit 113 when the second trigger is input within a certain time after the input of the first trigger. To do. The packet processing circuit 113 packetizes the stay signal and transmits it to the packet processing circuit 212 via the communication circuit 114 → the communication circuit 213 of the parent device 20. The packet processing circuit 212 separates the stay signal from the packet data and transmits it to the control circuit 214. Based on the stay signal, the control circuit 214 transmits a control signal for continuously storing the digital compressed image data of the video from the camera 101 of the slave unit 10 in the volatile memory 111, and stores the stored digital compressed image data. A control signal to be transmitted to the expansion circuit 209 of the parent device 20 is transmitted to the control circuit 115 of the child device 10 in the order in which they are performed. Based on this control signal, the control circuit 115 of the slave unit 10 transmits the digital compressed image data stored in the volatile memory 111 to the packet processing circuit 113 in the order of storage. The packet processing circuit 113 packetizes this digital compressed image data and transmits it to the packet processing circuit 212 via the communication circuit 114 → the communication circuit 213 of the parent device 20. The packet processing circuit 212 separates the digital compressed image data from the packet data and transmits it to the control circuit 214. The control circuit 214 outputs the digital compressed image data to the decompression circuit 209 in the order stored in the volatile memory 111 of the slave unit 10. The decompression circuit 209 decompresses the digital compressed image data and temporarily stores it in the volatile memory 210, and the control circuit 214 transmits the digital image data temporarily stored in the volatile memory 210 to the monitor control circuit 215. The video of the visitor is displayed on the monitor 201. In order to temporarily store the image data expanded by the expansion circuit 209 in the volatile memory 210, the area 1 to the area 30 can be overwritten, or if another area exists, it is stored there. Or you may.

  Further, the non-volatile memory 211 is used for recording and reproduction. Based on the fourth control function of the control circuit 214 of the parent device 20, the digital compressed image data stored in the volatile memory 111 of the child device 10 is stored. The oldest digital compressed image data is transferred in order. As shown in FIG. 2D, the non-volatile memory 211 is a predetermined area of the volatile memory 111 of the slave unit 10 that is necessary for pre-recording that is set in advance by the control circuit 214 when the second trigger is input. The image m in that area is accumulated in the area A. Subsequently, when the image m + 1 is inputted, it is accumulated in the area B, and when the image m + 2 is further inputted, it is accumulated in the area C. These accumulation operations are repeated each time new digital compressed image data is input.

  Further, since the control circuit 214 of the parent device 20 transmits an audio signal for causing the speaker 202 to ring based on the calling signal from the child device 10 to the speaker amplifier 206 via the audio codec 208, the calling signal from the parent device speaker 202 is transmitted. Sound can be sounded. When a resident operates a call with the call button 204 of the parent device 20 in order to respond to the call of the visitor, the child device microphone 104 and the child device speaker 103 of the child device 10, and the parent device microphone 203 and the parent device 20 of the parent device 20. The machine speaker 202 establishes a call between a visitor and a resident. When the resident ends the call with the call button 204 in order to end the call, a visit is made by the handset microphone 104 and handset speaker 103 of the handset 10 and by the handset microphone 203 and base phone speaker 202 of the base unit 20. The call state between the person and the resident is released. At this time, the digital compressed image data stored in the nonvolatile memory 211 of the parent device 20 remains stored.

  When the second trigger is not input within a certain time after the input of the first trigger, the control circuit 115 of the slave unit 10 stops storing the digital compressed image data in the volatile memory 111. Then, all the digital compressed image data stored in the volatile memory 111 is erased.

  When playing back recorded video stored in the nonvolatile memory 211, the playback button 205 is played back. When the playback button 205 is played back, a playback signal from the playback button 205 is transmitted to the control circuit 214. Based on this reproduction signal, the control circuit 214 outputs the digital compressed image data stored in the nonvolatile memory 211 for reproduction to the decompression circuit 209 in the order of accumulation. The decompression circuit 209 decompresses the digital compressed image data and temporarily stores it in the volatile memory 210, and the control circuit 214 transmits the digital image data temporarily stored in the volatile memory 210 to the monitor control circuit 215. The video of the visitor is displayed on the monitor 201. Here, the projected image is an image captured by the camera 101 of the handset 10 from when the human body sensor 101 reacts until the call ends.

  In this way, by setting the fourth control function in the control circuit 115 of the child device 10 and the control circuit 214 of the parent device 20, the image of the front door including the image of the visitor captured by the camera 101 of the child device 10 Can be recorded in the volatile memory 111 of the child device 10 or the nonvolatile memory 211 of the parent device 20 without any image being stored at all times.

In addition, the second trigger is the call signal from the call button 102 of the child device 10, but the present invention is not limited to this, and the visitor may stay for a certain period of time obtained from the reaction of the human body sensor 105. In this case, when the control circuit 115 of the child device 10 receives the human body detection signal, the internal timer of the control circuit 115 monitors whether the human body detection signal is continuously received for a predetermined time. If it is received for a certain time or longer, the control circuit 115 transmits a stay signal to the packet processing circuit 113 for transmission to the control circuit 214 of the parent device 20. The packet processing circuit 113 packetizes the stay signal and transmits it to the packet processing circuit 212 via the communication circuit 114 → the communication circuit 213 of the parent device 20. The packet processing circuit 212 separates the stay signal from the packet data and transmits it to the control circuit 214. When the control circuit 214 of the master unit 20 receives the stay signal, the control signal continues to store the digital compressed image data of the video from the camera 101 in the volatile memory 111 based on the fourth control function based on the fourth control function. And a control signal for transmitting the stored digital compressed image data to the expansion circuit 209 of the parent device 20 in the order of storage is transmitted to the control circuit 115 of the child device 10. Based on this control signal, the control circuit 115 of the child device 10 transmits the digital compressed image data stored in the volatile memory 111 to the packet processing circuit 113 in the order of storage. The packet processing circuit 113 packetizes this digital compressed image data and transmits it to the packet processing circuit 212 via the communication circuit 114 → the communication circuit 213 of the parent device 20. The packet processing circuit 212 separates the digital compressed image data from the packet data and transmits it to the control circuit 214. The control circuit 214 outputs the digital compressed image data to the decompression circuit 209 in the order stored in the volatile memory 111 of the slave unit 10. The decompression circuit 209 decompresses the digital compressed image data and temporarily stores it in the volatile memory 210, and the control circuit 214 transmits the digital image data temporarily stored in the volatile memory 210 to the monitor control circuit 215. The video of the visitor is displayed on the monitor 201. If the internal timer of the control circuit 115 cannot measure the retention of the human body detection signal for a certain period of time, the digital compressed image data is not stored in the volatile memory 111 based on the fourth control function of the control circuit 115. Then, all the digital compressed image data stored in the volatile memory 111 is erased.
[Example 5]
Next, a case where the control circuit 115 of the child device 10 and the control circuit 214 of the parent device 20 are set to the fifth control function will be described. Similar to the first control function, the fifth control function is assumed to use a visitor staying for a certain period of time obtained by operating the call button 102 as a second trigger. Further, it is assumed that the human body detection sensor 105 is built in the slave unit 10.

  When the human body detection sensor 105 detects a human body, a human body detection signal from the human body detection sensor 105 is transmitted to the control circuit 115. When receiving the human body detection signal, the control circuit 115 drives the camera 101 based on the fifth control function, so that imaging is started. Further, when receiving the human body sensing signal, the control circuit 115 monitors whether the call signal from the call button 102 is received within a predetermined time by an internal timer based on the fifth control function.

  The camera 101 of the slave unit 10 converts the captured video signal into digital compressed image data by the compression circuit 110. The compression circuit 110 stores the digital compressed image data in the volatile memory 111 based on the fifth control function of the control circuit 115. This volatile memory 111 is similar to the case of the fourth control function, and has a capacity capable of storing a plurality of image data in units of frames, and when the human body sensor 101 reacts as shown in FIG. Assuming that the digital compressed image data of the video from the camera 101 of the slave unit 10 is an image n, the control circuit 115 stores the image n in the area 1 of the volatile memory 111, and subsequently, in the area 2 when the image n + 1 is input. accumulate. When an image n + 2 is further input, it is accumulated in the area 3. This accumulation operation is repeated, and when an image n + 29 is input, it is accumulated in the area 30. Here, for example, when the image n + 30 is input, the process returns to the area 1 and the accumulated image of the image n is overwritten and accumulated. The volatile memory 111 is of an overwrite type that repeats these storage operations every time new image data is input, but has a storage capacity necessary for pre-recording.

  In this state, when a visitor calls the call button 102 of the child device 10, a call signal from the call button 102 is transmitted to the control circuit 115. The control circuit 115 recognizes this calling signal as the second trigger, and transmits the stay signal to the packet processing circuit 113 when the second trigger is input within a certain time after the input of the first trigger. To do. The packet processing circuit 113 packetizes the stay signal and transmits it to the packet processing circuit 212 via the communication circuit 114 → the communication circuit 213 of the parent device 20. The packet processing circuit 212 separates the stay signal from the packet data and transmits it to the control circuit 214. Based on the stay signal, the control circuit 214 transmits a control signal for continuously storing the digital compressed image data of the video from the camera 101 of the slave unit 10 in the volatile memory 111, and stores the stored digital compressed image data. A control signal to be transmitted to the expansion circuit 209 of the parent device 20 is transmitted to the control circuit 115 of the child device 10 in the order in which they are performed. Based on this control signal, the control circuit 115 of the child device 10 transmits the digital compressed image data stored in the volatile memory 111 to the packet processing circuit 113 in the order of storage. The packet processing circuit 113 packetizes this digital compressed image data and transmits it to the packet processing circuit 212 via the communication circuit 114 → the communication circuit 213 of the parent device 20. The packet processing circuit 212 separates the digital compressed image data from the packet data and transmits it to the control circuit 214. The control circuit 214 outputs the digital compressed image data to the decompression circuit 209 in the order in which they are stored in the volatile memory 111 of the slave unit 10. The decompression circuit 209 decompresses the digital compressed image data and temporarily stores it in the volatile memory 210, and the control circuit 214 transmits the digital image data temporarily stored in the volatile memory 210 to the monitor control circuit 215. The video of the visitor is displayed on the monitor 201. In order to temporarily store the image data expanded by the expansion circuit 209 in the volatile memory 210, the area 1 to the area 30 can be overwritten, or if another area exists, it is stored there. Or you may.

  Further, the non-volatile memory 112 is used for recording and reproduction. Based on the fifth control function of the control circuit 115 of the slave unit 10, the digital compressed image data stored in the volatile memory 111 of the slave unit 10 is stored. The oldest digital compressed image data is transferred in order. As shown in FIG. 2 (e), the non-volatile memory 112 is traced back to a predetermined area of the volatile memory 111 necessary for pre-recording, which is set in advance by the control circuit 115 when the second trigger is inputted. The image m of the area is stored in the area A. When the image m + 1 is subsequently input, it is stored in the area B, and when the image m + 2 is further input, it is stored in the area C. These accumulation operations are repeated each time new digital compressed image data is input.

  Further, since the control circuit 214 of the parent device 20 transmits an audio signal for causing the speaker 202 to ring based on the calling signal from the child device 10 to the speaker amplifier 206 via the audio codec 208, the calling signal from the parent device speaker 202 is transmitted. Sound can be sounded. When a resident operates a call with the call button 204 of the parent device 20 in order to respond to the call of the visitor, the child device microphone 104 and the child device speaker 103 of the child device 10, and the parent device microphone 203 and the parent device 20 of the parent device 20. The machine speaker 202 establishes a call between a visitor and a resident. When the resident ends the call with the call button 204 in order to end the call, a visit is made by the handset microphone 104 and handset speaker 103 of the handset 10 and by the handset microphone 203 and base phone speaker 202 of the base unit 20. The call state between the person and the resident is released. At this time, the digital compressed image data stored in the nonvolatile memory 211 of the parent device 20 remains stored.

  When the second trigger is not input within a certain time after the input of the first trigger, the control circuit 115 of the slave unit 10 stops storing the digital compressed image data in the volatile memory 111. Then, all the digital compressed image data stored in the volatile memory 111 is erased.

  In addition, when the recorded video stored in the nonvolatile memory 112 is played back, the playback button 205 is played back. When the playback button 205 is played back, a playback signal from the playback button 205 is transmitted to the control circuit 214. The control circuit 214 outputs control signals to be output to the decompression circuit 209 of the master unit 20 in the order in which the digital compressed image data stored for playback in the non-volatile memory 112 of the slave unit 10 is stored based on the playback signal. To the control circuit 115 of the machine 10. When receiving the control signal, the control circuit 115 of the child device 10 transmits the digital compressed image data stored for reproduction in the nonvolatile memory 112 to the packet processing circuit 113 in the order in which they are stored. The packet processing circuit 113 packetizes the digital compressed image data and transmits the packetized data to the packet processing circuit 212 via the communication circuit 114 → the communication circuit 213 of the parent device 20. The packet processing circuit 212 separates the digital compressed image data from the packet data and transmits it to the control circuit 214. The control circuit 214 outputs the digital compressed image data to the decompression circuit 209 in the order stored in the nonvolatile memory 112 of the slave unit 10. The decompression circuit 209 decompresses the digital compressed image data and temporarily stores it in the volatile memory 210, and the control circuit 214 transmits the digital image data temporarily stored in the volatile memory 210 to the monitor control circuit 215. The video of the visitor is displayed on the monitor 201. Here, the projected image is an image captured by the camera 101 of the handset 10 from when the human body sensor 101 reacts until the call ends.

  In this way, by setting the fifth control function in the control circuit 115 of the child device 10 and the control circuit 214 of the parent device 20, the image of the front door including the image of the visitor captured by the camera 101 of the child device 10 Can be recorded in the volatile memory 111 or the non-volatile memory 112 of the slave unit 10 without storing the image at all times.

In addition, the second trigger is the call signal from the call button 102 of the child device 10, but the present invention is not limited to this, and the visitor may stay for a certain period of time obtained from the reaction of the human body sensor 105. In this case, when the control circuit 115 of the child device 10 receives the human body detection signal, the internal timer of the control circuit 115 monitors whether the human body detection signal is continuously received for a predetermined time. If it is received for a certain time or longer, the control circuit 115 transmits a stay signal to the packet processing circuit 113 for transmission to the control circuit 214 of the parent device 20. The packet processing circuit 113 packetizes the stay signal and transmits it to the packet processing circuit 212 via the communication circuit 114 → the communication circuit 213 of the parent device 20. The packet processing circuit 212 separates the stay signal from the packet data and transmits it to the control circuit 214. When the control circuit 214 of the master unit 20 receives the stay signal, the control signal continues to cause the control circuit 115 of the slave unit 10 to continuously store the digital compressed image data of the video from the camera 101 in the volatile memory 111 based on the fifth control function. And a control signal for transmitting the stored digital compressed image data to the expansion circuit 209 of the parent device 20 in the order of storage is transmitted to the control circuit 115 of the child device 10. Based on this control signal, the control circuit 115 of the child device 10 transmits the digital compressed image data stored in the volatile memory 111 to the packet processing circuit 113 in the order of storage. The packet processing circuit 113 packetizes this digital compressed image data and transmits it to the packet processing circuit 212 via the communication circuit 114 → the communication circuit 213 of the parent device 20. The packet processing circuit 212 separates the digital compressed image data from the packet data and transmits it to the control circuit 214. The control circuit 214 outputs the digital compressed image data to the decompression circuit 209 in the order stored in the volatile memory 111 of the slave unit 10. The decompression circuit 209 decompresses the digital compressed image data and temporarily stores it in the volatile memory 210, and the control circuit 214 transmits the digital image data temporarily stored in the volatile memory 210 to the monitor control circuit 215. The video of the visitor is displayed on the monitor 201. If the internal timer of the control circuit 115 cannot measure the retention of the human body detection signal for a certain time, the accumulation of the digital compressed image data in the volatile memory 111 is stopped based on the fifth control function of the control circuit 115. Then, all the digital compressed image data stored in the volatile memory 111 is erased.
[Example 6]
Next, a case where the control circuit 115 of the child device 10 and the control circuit 214 of the parent device 20 are set to the sixth control function will be described. Similar to the first control function, the sixth control function is based on a visitor staying for a certain period of time obtained by operating the call button 102 as a second trigger. Further, it is assumed that the human body detection sensor 105 is built in the slave unit 10.

  When the human body detection sensor 105 detects a human body, a human body detection signal from the human body detection sensor 105 is transmitted to the packet processing circuit 113 via the control circuit 115. The packet processing circuit 113 packetizes the human body sensing signal and transmits it to the packet processing circuit 212 via the communication circuit 114 → the communication circuit 213 of the parent device 20. The packet processing circuit 212 separates the human body sensing signal from the packet data and transmits it to the control circuit 214. When receiving the human body detection signal, the control circuit 214 of the parent device 20 transmits a control signal for driving the camera 101 of the child device 10 to the packet processing circuit 212 using this signal as a first trigger based on the sixth control function. To do. The packet processing circuit 212 packetizes the control signal and transmits it to the packet processing circuit 113 via the communication circuit 213 → the communication circuit 114 of the slave unit 10. The packet processing circuit 113 separates the control signal from the packet data and transmits it to the control circuit 115. Since the control circuit 115 of the child device 10 drives the camera 101 based on this control signal, imaging is started. Further, when receiving the human body detection signal, the control circuit 115 of the child device 10 monitors whether the call signal from the call button 102 of the child device 10 is received within a predetermined time by an internal timer based on the sixth control function. .

  The camera 101 of the slave unit 10 converts the captured video signal into digitally compressed image data by the compression circuit 101 and transmits it to the packet processing circuit 113. The packet processing circuit 113 packetizes the digital compressed image data and transmits it to the packet processing circuit 212 via the communication circuit 114 → the communication circuit 213 of the parent device 20. The packet processing circuit 212 separates the digital compressed image data from the packet data and transmits it to the control circuit 214. The control circuit 214 stores the digital compressed image data in the volatile memory 210. This volatile memory 210 has a capacity capable of storing a plurality of image data in units of frames, and as shown in FIG. 2 (f), the digital of the video from the camera 101 of the slave unit 10 when the human body sensor 101 reacts. Assuming that the compressed image data is an image n, the control circuit 214 stores the image n in the area 1 of the volatile memory 210, and subsequently stores the image n + 1 in the area 2 when the image n + 1 is input. When an image n + 2 is further input, it is accumulated in the area 3. This accumulation operation is repeated, and when an image n + 29 is input, it is accumulated in the area 30. Here, for example, when the image n + 30 is input, the process returns to the area 1 and the accumulated image of the image n is overwritten and accumulated. The volatile memory 210 is of an overwrite type that repeats these storage operations every time new image data is input, but has a storage capacity necessary for pre-recording.

  In this state, when a visitor calls the call button 102 of the child device 10, a call signal from the call button 102 is transmitted to the control circuit 115. The control circuit 115 recognizes this calling signal as the second trigger, and transmits the stay signal to the packet processing circuit 113 when the second trigger is input within a certain time after the input of the first trigger. To do. The packet processing circuit 113 packetizes the stay signal and transmits it to the packet processing circuit 212 via the communication circuit 114 → the communication circuit 213 of the parent device 20. The packet processing circuit 212 separates the stay signal from the packet data and transmits it to the control circuit 214. Based on this stay signal, the control circuit 214 stores the digital compressed image data of the video from the camera 101 of the slave unit 10 in the volatile memory 210 and the decompression circuit 209 in the order in which the stored digital compressed image data is stored. Output to. The decompression circuit 209 decompresses the digital compressed image data and temporarily stores it in the volatile memory 210, and the control circuit 214 transmits the digital image data temporarily stored in the volatile memory 210 to the monitor control circuit 215. The video of the visitor is displayed on the monitor 201. In order to temporarily store the image data expanded by the expansion circuit 209 in the volatile memory 210, the area 1 to the area 30 can be overwritten, or if another area exists, it is stored there. Or you may.

  The non-volatile memory 112 is used for recording and reproduction. Based on the sixth control function of the control circuit 214 of the parent device 20, the digital compression image data stored in the volatile memory 210 is the oldest digital compression. The image data is transferred in order. As shown in FIG. 2 (f), the non-volatile memory 112 is traced back to a predetermined area of the volatile memory 210 necessary for pre-recording, which is set in advance by the control circuit 214 when the second trigger is inputted. The image m of the area is stored in the area A. When the image m + 1 is subsequently input, it is stored in the area B, and when the image m + 2 is further input, it is stored in the area C. These accumulation operations are repeated each time new digital compressed image data is input.

  Further, since the control circuit 214 of the parent device 20 transmits an audio signal for causing the speaker 202 to ring based on the calling signal from the child device 10 to the speaker amplifier 206 via the audio codec 208, the calling signal from the parent device speaker 202 is transmitted. Sound can be sounded. When a resident operates a call with the call button 204 of the parent device 20 in order to respond to the call of the visitor, the child device microphone 104 and the child device speaker 103 of the child device 10, and the parent device microphone 203 and the parent device 20 of the parent device 20. The machine speaker 202 establishes a call between a visitor and a resident. When the resident ends the call with the call button 204 in order to end the call, a visit is made by the handset microphone 104 and handset speaker 103 of the handset 10 and by the handset microphone 203 and base phone speaker 202 of the base unit 20. The call state between the person and the resident is released. At this time, the digital compressed image data stored in the nonvolatile memory 211 of the parent device 20 remains stored.

  If the second trigger is not input within a certain time after the input of the first trigger, the control circuit 214 of the base unit 20 stops storing the digital compressed image data in the volatile memory 210. Then, all the digital compressed image data stored in the volatile memory 210 is erased.

  Further, when the recorded video stored in the non-volatile memory 112 of the child device 10 is played back, the playback button 205 is played back. When the playback button 205 is played back, a playback signal from the playback button 205 is transmitted to the control circuit 214. The control circuit 214 outputs control signals to be output to the decompression circuit 209 of the master unit 20 in the order in which the digital compressed image data stored for playback in the non-volatile memory 112 of the slave unit 10 is stored based on the playback signal. To the control circuit 115 of the machine 10. When receiving the control signal, the control circuit 115 of the child device 10 transmits the digital compressed image data stored for reproduction in the nonvolatile memory 112 to the packet processing circuit 113 in the order in which they are stored. The packet processing circuit 113 packetizes the digital compressed image data and transmits the packetized data to the packet processing circuit 212 via the communication circuit 114 → the communication circuit 213 of the parent device 20. The packet processing circuit 212 separates the digital compressed image data from the packet data and transmits it to the control circuit 214. The control circuit 214 outputs the digital compressed image data to the decompression circuit 209 in the order stored in the nonvolatile memory 112 of the slave unit 10. The decompression circuit 209 decompresses the digital compressed image data and temporarily stores it in the volatile memory 210, and the control circuit 214 transmits the digital image data temporarily stored in the volatile memory 210 to the monitor control circuit 215. The video of the visitor is displayed on the monitor 201. Here, the projected image is an image captured by the camera 101 of the handset 10 from when the human body sensor 101 reacts until the call ends.

  In this way, by setting the sixth control function in the control circuit 115 of the child device 10 and the control circuit 214 of the parent device 20, the image of the front door including the image of the visitor captured by the camera 101 of the child device 10 Can be recorded in the volatile memory 210 of the parent device 20 and the non-volatile memory 112 of the child device 10 at all times without preserving images.

  In addition, the second trigger is the call signal from the call button 102 of the child device 10, but the present invention is not limited to this, and the visitor may stay for a certain period of time obtained from the reaction of the human body sensor 105. In this case, when the control circuit 115 of the child device 10 receives the human body detection signal, the internal timer of the control circuit 115 monitors whether the human body detection signal is continuously received for a predetermined time. If it is received for a certain time or longer, the control circuit 115 transmits a stay signal to the packet processing circuit 113 for transmission to the control circuit 214 of the parent device 20. The packet processing circuit 113 packetizes the stay signal and transmits it to the packet processing circuit 212 via the communication circuit 114 → the communication circuit 213 of the parent device 20. The packet processing circuit 212 separates the stay signal from the packet data and transmits it to the control circuit 214. When receiving the stay signal, the control circuit 214 of the master unit 20 stores the digital compressed image data of the video from the camera 101 of the slave unit 10 in the volatile memory 210 based on the sixth control function, and the stored digital The compressed image data is output to the decompression circuit 209 in the order of accumulation. The decompression circuit 209 decompresses the digital compressed image data and temporarily stores it in the volatile memory 210, and the control circuit 214 transmits the digital image data temporarily stored in the volatile memory 210 to the monitor control circuit 215. The video of the visitor is displayed on the monitor 201. In addition, for recording and reproduction, based on the sixth control function of the control circuit 214 of the parent device 20, the digital compressed image data stored in the volatile memory 210 is the oldest digital compressed image data in order from the oldest digital compressed image data. Transferred to the non-volatile memory 112.

  If the internal timer of the control circuit 115 cannot measure the retention of the human body sensing signal for a certain period of time, a recording erasure signal is transmitted to the packet processing circuit 113 for transmission to the control circuit 214 of the parent device 20. The packet processing circuit 113 packetizes the recording erasure signal and transmits it to the packet processing circuit 212 via the communication circuit 114 → the communication circuit 213 of the parent device 20. The packet processing circuit 212 separates the recording erasure signal from the packet data and transmits it to the control circuit 214. When receiving the recording erasure signal, the control circuit 214 of the master unit 20 stops storing the digital compressed image data in the nonvolatile memory 112 of the slave unit 10 or the volatile memory 210 of the master unit 20 based on the sixth control function. All the digital compressed image data stored in the nonvolatile memory 112 and the volatile memory 210 are erased.

It is a whole block diagram which shows the example of preferable embodiment in the television door phone apparatus of this invention. It is explanatory drawing which shows the video recording state by the television door phone apparatus of this invention, (a) is an image storage image of the non-volatile memory of the main | base station by a 1st control function, (b) is the image | photograph of the subunit | mobile_unit by a 2nd control function. (C) is a volatile memory of the main unit by the third control function and each image storage image of the non-volatile memory, and (d) is a volatilization of the slave unit by the fourth control function. (E) is an image storage image of the volatile memory and the nonvolatile memory of the slave unit by the fifth control function, and (f) is the sixth image storage image of the nonvolatile memory and the nonvolatile memory of the parent device. It is each image accumulation image of the volatile memory of the main | base station by the control function, and the non-volatile memory of a sub_unit | device.

Explanation of symbols

10 …… Slave unit 101 …… Camera 102 …… Call button 105 …… Human body sensor 106 …… Sensor interface 111 …… Volatile memory 112 …… Nonvolatile memory 115 …… Control circuit

20 …… Master device 201 …… Monitor 210 …… Volatile memory 211 …… Nonvolatile memory 214 …… Control circuit

Claims (3)

A human body sensor (105) for detecting whether or not there is a visitor in the vicinity of the child device (10) having the call button (102) is captured by the camera (101) of the child device. A television doorphone device having a function for displaying a recorded image on a monitor (201) of a master unit (20) and recording the image as a still image or a moving image,
The parent device has a non-volatile memory (211) for recording the video and a response of the human body sensor, which is obtained from a first trigger, operation of the call button or a response of the human body sensor. Recording of the video to the non-volatile memory is started by the input of the first trigger, and the second trigger is input within the predetermined time after the input of the first trigger. And a control circuit (214) for erasing the recording when no trigger is inputted. A human body sensor (105) for detecting whether or not there is a visitor in the vicinity of the child device (10) having the call button (102) is captured by the camera (101) of the child device. A television doorphone device having a function for displaying a recorded image on a monitor (201) of a master unit (20) and recording the image as a still image or a moving image,
The slave has a non-volatile memory (112) for recording a video imaged by the camera,
The slave unit and the master unit have a response of the human body sensor as a first trigger, and a stay of a visitor for a certain time obtained from an operation of the call button or a response of the human body sensor as a second trigger. Recording of the video into the non-volatile memory is started by the input of the first trigger, and the recording is deleted when the second trigger is not input within a certain time after the input of the first trigger. TV door phone apparatus, comprising a control circuit (214, 115) for the above. A human body sensor (105) for detecting whether or not there is a visitor in the vicinity of the child device (10) having the call button (102) is captured by the camera (101) of the child device. A television doorphone device having a function for displaying a recorded image on a monitor (201) of a master unit (20) and recording the image as a still image or a moving image,
The volatile memory (111, 210) for temporarily recording the video and the response of the human body sensor is a first trigger, the operation of the call button or the response of the human body sensor obtained from the response of the human body sensor Recording of the video to the volatile memory is started by the input of the first trigger, and the second trigger is set within a predetermined time after the input of the first trigger. A control circuit (214, 115) for erasing the recording when a trigger is not input, and a video recorded in the volatile memory by a second trigger input under the control of the control circuit is transferred to the video. A television door phone device comprising a non-volatile memory (112, 211) for recording.

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