KR20170080156A - Wireless doorphone and apparatus and method for controlling stream thereof - Google Patents

Wireless doorphone and apparatus and method for controlling stream thereof Download PDF

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Publication number
KR20170080156A
KR20170080156A KR1020150191413A KR20150191413A KR20170080156A KR 20170080156 A KR20170080156 A KR 20170080156A KR 1020150191413 A KR1020150191413 A KR 1020150191413A KR 20150191413 A KR20150191413 A KR 20150191413A KR 20170080156 A KR20170080156 A KR 20170080156A
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KR
South Korea
Prior art keywords
data stream
command signal
door phone
unit
remote server
Prior art date
Application number
KR1020150191413A
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Korean (ko)
Inventor
이왕기
최신대
Original Assignee
주식회사 경동원
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Application filed by 주식회사 경동원 filed Critical 주식회사 경동원
Priority to KR1020150191413A priority Critical patent/KR20170080156A/en
Priority to PCT/KR2016/015467 priority patent/WO2017116157A1/en
Publication of KR20170080156A publication Critical patent/KR20170080156A/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/02—Telephonic communication systems specially adapted for combination with other electrical systems with bell or annunciator systems
    • H04M11/025—Door telephones
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F15/00—Power-operated mechanisms for wings
    • E05F15/70—Power-operated mechanisms for wings with automatic actuation
    • E05F15/77—Power-operated mechanisms for wings with automatic actuation using wireless control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/02—Telephonic communication systems specially adapted for combination with other electrical systems with bell or annunciator systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
    • H04M11/062—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors using different frequency bands for speech and other data
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2400/00—Electronic control; Electrical power; Power supply; Power or signal transmission; User interfaces
    • E05Y2400/10—Electronic control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2201/00—Electronic components, circuits, software, systems or apparatus used in telephone systems
    • H04M2201/50—Telephonic communication in combination with video communication

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)
  • Closed-Circuit Television Systems (AREA)

Abstract

Disclosed is a wireless door phone and a stream control device for controlling the quality of video and audio streams transmitted from a wireless door phone in accordance with a state of a wireless bandwidth.
According to an aspect of the present invention, there is provided a wireless door phone including: a stream processing unit that encodes an image captured by a camera unit and a voice recorded in a microphone unit in real time, and generates a data stream including an encoded image and an encoded voice; Wherein when the first command signal is received from the remote server, the image captured by the camera unit after receiving the first command signal is encoded with a resolution lower than that of the encoded image before the first command signal is received, A control unit for controlling the stream processing unit to receive the second command signal from the remote server and to control the stream processing unit so that the data stream includes only the audio recorded in the microphone unit after receiving the second command signal, ; And a communication unit for transmitting the data stream to the remote server and receiving the command signal from the remote server.

Description

TECHNICAL FIELD [0001] The present invention relates to a stream control device and a control method for a wireless door phone, a wireless door phone,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a stream control device and a control method of a wireless door phone and a wireless door phone, and more particularly to a wireless door phone , A stream control device and a control method of a wireless door phone.

 Door phone systems, which are installed at the entrance of a home or a work space to check the identity of the visitor through video and voice, and furthermore control the opening and closing of the door, have been widely used for a long time.

In addition, since wireless communication technologies such as WiFi technology have been widely used, images captured through a camera of a door phone fixedly installed at an entrance are not transmitted to a receiver embedded in a specific wall surface of a room, And a wireless door phone system in which the opening and closing state of the doorway is controlled by the portable device has recently been popularized.

In this regard, Korean Patent Registration No. 10-1353617 (titled "remote control device using a videophone with a Wi-Fi module") allows a user to control a remote device such as a desktop, a smartphone or a notebook It is possible to check the status information of the smart device in the wired or wireless home connected to the video phone through the web program provided by the server and to control the smart device, A user who is authenticated by a remote server that can reduce the cost of maintaining and managing the smart device by checking the failure of the smart device in real time through a wireless router connected to the remote server via Ethernet, RF module and wired RS485 module to connect the video phone to the RF module A remote control device using a videophone equipped with a Wi-Fi module that allows an authenticated user to conveniently control and manage smart devices in the home by sending control commands to a wired smart device equipped with a wireless smart device and an RS485 module Discloses an invention relating to the present invention.

However, existing wireless door phones use a method of transmitting encoded image data to a remote server or a portable device so as to have a single resolution.

In this case, since the resolution is fixed irrespective of the wireless speed, normal use may become difficult depending on the wireless environment.

For example, if the wireless bandwidth is small compared to the data stream, a phenomenon that the image is partially broken or the number of frames per second is reduced in the portable device receiving the image photographed through the wireless door phone camera, There is a possibility that normal conversation and user identification can not be performed.

This phenomenon occurs when the distance between the Internet access point (i.e., wireless Internet router) and the wireless door phone is shorter than the case where the wireless door phone is used at a time when traffic is surging, And the communication quality becomes worse far.

Accordingly, there has been a request for a stream control technique of a wireless door phone that controls the quality of video and audio streams transmitted from a wireless door phone in accordance with the situation of wireless bandwidth.

Korean Patent Registration No. 10-1353617 (A remote control device using a video phone having a Wi-Fi module)

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned needs, and it is an object of the present invention to provide a wireless door phone that controls the quality of video and audio streams transmitted from a wireless door phone, And to provide the above objects.

In order to achieve the above object, a wireless door phone according to an aspect of the present invention includes: a camera module for encoding in real time an image photographed by a camera module and a voice recorded in a microphone module, and a data including an encoded image and an encoded voice A stream processing unit for generating a stream; Wherein when the first command signal is received from the remote server, the image captured by the camera unit after receiving the first command signal is encoded with a resolution lower than that of the encoded image before the first command signal is received, A control unit for controlling the stream processing unit to receive the second command signal from the remote server and to control the stream processing unit so that the data stream includes only the audio recorded in the microphone unit after receiving the second command signal, ; And a communication unit for transmitting the data stream to the remote server and receiving the command signal from the remote server.

According to another aspect of the present invention, there is provided a stream control apparatus for a wireless door phone, comprising: a frame calculation unit calculating a frame number per unit time of an image included in a data stream received from a wireless door phone and comparing the number of frames per unit time with a reference frame number; And a controller for transmitting a first command signal to the wireless door phone through a communication unit, the first command signal indicating that the resolution of the encoded image is lowered when the number of frames per unit time is less than the reference frame number.

According to another aspect of the present invention, there is provided a method for controlling a streaming of a wireless door phone, the method comprising the steps of: encoding a video shot by a wireless door phone in a camera unit and a voice recorded in a microphone unit in real time; The wireless door phone generating a data stream comprising an encoded image and an encoded voice; And transmitting the data stream to the remote server when the wireless door phone receives the first command signal from the remote server, and after the wireless door phone receives the first command signal, Wherein the encoding unit encodes the image captured by the camera unit at a resolution lower than that of the encoded image before receiving the first command signal and when receiving the second command signal from the remote server, And generates the data stream so as to include only the voice recorded in the microphone unit.

According to another aspect of the present invention, a method for controlling a streaming of a wireless door phone includes the steps of: a remote server receiving a data stream from a wireless door phone; If the data stream includes an image, the remote server calculates the number of frames per unit time of the image and compares the number of frames per unit time with the number of reference frames; And transmitting the first command signal to the remote server to the wireless door phone, the first command signal indicating that the resolution of the encoded image is lowered when the number of frames per unit time is less than the reference frame number.

The use of the stream control device and the control method of the wireless door phone according to the present invention can realize a wireless door phone system that controls the quality of video and audio streams transmitted from the wireless door phone in accordance with the state of wireless bandwidth Can be obtained.

1 is a diagram illustrating an example of a wireless door phone system including a wireless door phone, a remote server, and a portable device,
2 is a more detailed block diagram of the wireless door phone of Fig.
3 is a more detailed block diagram of the remote server of FIG.
FIG. 4 is a block diagram showing the portable device of FIG. 1 in more detail;
5 is a flowchart showing an example of a stream control method of a wireless door phone,
6 is a flowchart showing another example of a stream control method of a wireless door phone,
7 is a flowchart showing another example of a stream control method of a wireless door phone,
8 is a flowchart showing another example of a stream control method of a wireless door phone.

Hereinafter, a stream control device and a control method of a wireless door phone will be described in more detail with reference to the accompanying drawings.

1 is a diagram illustrating an example of a wireless door phone system including a wireless door phone, a remote server, and a portable device.

As shown in FIG. 1, a wireless door phone system includes a wireless door phone 1, a remote server 2 and a portable device 3 connected to each other by using a communication network, for example, the Internet.

For example, when a video and a voice of a visitor are photographed and recorded through a camera and a microphone of the wireless door phone 1, the wireless door phone 1 generates a data stream by encoding the video and the voice with a predefined appropriate standard , And transmits the data stream to the remote server 2 via the communication network. If a data stream is transmitted to the remote server 2, the remote server 2 may directly store the data stream or may transmit the data stream to the portable device 3.

Unless defined otherwise, the data stream referred to in this document is defined as a data stream that contains both video and audio data.

The remote server 2 calculates the number of frames per second of the image included in the transmitted data stream and determines whether the frame rate exceeds a reference value (for example, 30 frames per second) set as a normal operation range. If the calculated number of image frames per second is less than the reference value, the wireless door phone side is requested to transmit the data stream so as to have a low resolution image having a smaller data amount. This is because when the data stream is transmitted so as to have a low-resolution image having a relatively small data amount, a higher frame rate per second will be obtained.

When the wireless door phone 1 receives a request to transmit a data stream from the remote server 2 to a low resolution image, the wireless door phone 1 encodes the data stream to have a lower resolution image than the default image To the remote server (2). For example, when a signal having a resolution (high resolution) of 1980 ㅧ 1080 pixels is transmitted as a default and a signal requesting transmission from a remote server 2 to a relatively low resolution image is received, a resolution of 1280 ㅧ 720 pixels The resolution of the image can be transmitted. Furthermore, it is also possible to reduce the size of the data stream so as to transmit the image with a lower resolution step by step or, in some cases, to include only audio without including the image.

The remote server 2 controls the quality and the data amount of the video data included in the data stream by adapting to the situation of the wireless communication environment between the wireless door phone 1 and the remote server 2, The image captured by the wireless door phone 1 can be relayed without being broken or torn.

1, the wireless door phone 1 and the remote server 2 are connected to each other through a wireless Internet, and between the wireless door phone 1 and the remote server 2, A data stream may be transmitted further via routers, wireless repeaters, and / or Internet modems, and the like.

Likewise, a data stream can be transmitted between the remote server 2 and the portable device 3 through various wireless communication networks such as a WiFi network, a 3G data communication network, and an LTE data communication network.

2 is a block diagram illustrating the wireless door phone of FIG. 1 in more detail.

2, the wireless door phone 1 includes a camera unit 10, a microphone unit 11, a memory unit 12, a control unit 13, a video and audio processing unit 14, and a communication unit 15 do. Furthermore, it may further include an opening / closing part 16.

The camera unit 10 captures an image of a place where the wireless door phone 1 is installed, for example, a video of a visitor. As far as an imaging device capable of capturing a moving picture, an imaging device including CMOS, CCD, or any other imaging device can be used in various ways to implement the camera unit 10.

The microphone unit 11 records the sound of the place where the wireless door phone 1 is installed, for example, the voice of the visitor and / or the ambient sound. A microphone device including a dynamic microphone, a condenser microphone, and any other acoustic sensor may be used to implement the microphone unit 11 as long as it can record sound.

The memory unit 12 stores any firmware or software necessary for the operation of the wireless door phone 1 and various temporary files generated during execution of the firmware or software. Various types of temporary files include video data obtained by encoding the source video data and the source video data captured by the camera unit 10 and analog-to-digital converted into a proper standard, source audio data recorded by the microphone unit 11 and analog-digital converted, Audio data in which the source video data is encoded in an appropriate standard, data to be encoded into the encoded video data and stream data to be transmitted to the remote server 2, and the like. In addition, data relating to various setting values necessary for the operation of the wireless door phone 1 are also stored in the memory unit 12. [

The memory unit 12 may be any of a variety of storage devices such as a RAM, a ROM, an EEPROM, a flash memory, a hard disk, an SSD, and the like, as long as it is suitable for the nature and capacity of data to be stored. It is also usable to use.

The control unit 13 controls the operation of the camera unit 10, the microphone unit 11, the memory unit 12, the video and audio processing unit 14, the communication unit 15, and the opening and closing unit 16 of the wireless door phone 1 So that the normal operation of the wireless door phone 1 is controlled. Further, the control unit 13 interprets the command signal transmitted from the remote server 2, and the video and audio processing unit 14 adjusts the resolution of the video to lower the resolution.

The control unit 13 may be a general purpose processor as long as it can perform the function of the control unit 13, and a dedicatedly designed processor may be used.

The video and audio processing unit 14 processes the video shot by the camera unit 10 and the audio (sound) recorded by the microphone unit 11 in a form suitable for being transmitted to the remote server 2 side.

For example, in the case of an image, the video and audio processing unit 14 performs analog-to-digital conversion of the analog video captured by the camera unit 10 and then performs encoding so as to have a resolution and a bit rate and a codec indicated by the control unit 13 do. Similarly, in the case of voice, after analog-to-digital conversion of the analog voice (sound) recorded in the microphone unit 11, encoding is performed so as to have a bit rate and a codec indicated by the control unit. In addition, a data stream is generated so that video data and audio data can be streamed to the remote server 2 side.

The video and audio processing unit 14 may be implemented as separate dedicated hardware and software as long as the above operation can be performed, and may be implemented variously as software executed on a general-purpose processor.

The communication unit 15 performs bidirectional communication with the remote server 2, such as transmitting stream data from the wireless door phone 1 to the remote server 2 and receiving command signals transmitted from the remote server 2.

The communication unit 15 can basically be an RF communication module capable of performing WiFi communication. Other communication modules capable of performing wireless data communication between the door phone and the remote server may be variously applied.

The opening / closing part 16 is an opening / closing device (not shown) connected to the door phone 1, and opens / closes the entrance / exit in accordance with the control signal of the control part 13. When the portable unit 3 receives a signal related to the opening / closing of the entrance / exit from the portable device 3 or the like, or when it needs to operate the opening / closing unit in accordance with a predetermined rule, the control unit 13 transmits a signal capable of opening / closing the opening / closing unit 16 .

3 is a more detailed block diagram of the remote server of FIG.

3, the remote server 2 includes a communication unit 20, a frame calculation unit 21, a memory unit 22, a stream transfer unit 23, and a control unit 24.

The communication unit 20 receives the data stream transmitted from the wireless door phone 1 and performs bidirectional communication with the wireless door phone 1 by transmitting a command signal to the wireless door phone 1. [ The communication unit 20 may be variously applied to a communication module capable of performing bi-directional data communication based on Internet protocols and the like.

The frame calculation unit 21 calculates the number of frames per unit time of an image included in the data stream transmitted from the wireless door phone 1 and determines whether the number of frames is within a normal range. For example, the frame calculation unit 21 calculates the frame per second of the image and informs the control unit 23 whether the calculated number of frames per second exceeds 30 frames per second (30 fps), which is the reference frame number.

The memory section 22 includes any firmware or software necessary for the operation of the remote server 2 and various temporary files generated during the execution of the firmware or software and the streaming data received from the wireless door phone 1. [ In addition, data relating to various setting values necessary for the operation of the remote server 2 are also stored in the memory unit 22. [

The memory unit 22 may be any of a variety of storage devices such as a RAM, a ROM, an EEPROM, a flash memory, a hard disk, an SSD, and the like, as long as it is suitable for the nature and capacity of data to be stored. It is also usable to use.

The stream transmission unit 23 receives a request for transmission of a data stream from the portable device 3 and relays the data stream received from the wireless door phone 1 to the portable device 3 in response to the transmission request.

The stream transferring unit 23 may be a remote server 2 side application program for processing a transfer request from the portable device 3. [

The control unit 24 controls the normal operation of the remote server 2 by controlling the communication unit 20, the frame calculation unit 21, the memory unit 22, and the stream transfer unit 23. [ In addition, the control unit 24 transmits a clear signal regarding the change of the video resolution to the wireless door phone 1, so that the data stream can be adapted to the communication environment.

4 is a block diagram showing the portable device of FIG. 1 in more detail.

4, the portable device 3 includes a communication unit 30, a memory unit 31, a stream processing unit 32, a video display unit 33, a sound output unit 34, and a control unit 35 .

For example, the portable device 3 may be a general-purpose portable telephone, a tablet PC, or the like equipped with an application that can process a data stream relayed from a remote server and reproduce video and audio.

The communication unit 30 transmits a signal requesting the data stream to the remote server 2 via the communication network and receives the data stream from the remote server 2. [

The memory unit 31 includes any firmware or software necessary for the operation of the portable device 3 and various temporary files generated during the execution of the firmware or software and the streaming data received from the remote server 2. [ In addition, data on various setting values necessary for the operation of the portable device 3 are also stored in the memory unit 22. [

The stream processing unit 32 decodes video data and audio data from the data stream received from the remote server 2 so that the stream data can be reproduced on the portable device 3. [ The stream processor 32 may include a hardware decoder as well as a software decoder.

The video display unit 33 displays the decoded video data in the stream processing unit 32 and displays the video data so that the user can view the video shot by the camera unit 10 of the door phone. The image display unit 33 may be a display device of the portable device 3, for example.

The audio output unit 34 outputs the decoded audio data in the stream processing unit 32 so that the user can reproduce the audio (sound) recorded by the microphone unit 11 of the door phone. The audio output unit 34 may be a speaker of the portable device 3, for example.

5 is a flowchart showing an example of a stream control method of a wireless door phone.

5 shows a flow in which a stream of a wireless door phone is controlled by a remote server 2 by requesting a low-resolution image from the remote server 2 to the wireless door phone 1 side.

First, the remote server 2 receives a data stream from the wireless door phone 1 (40).

The remote server 2 receiving the data stream calculates the number of image frames per second (per second) in the received data stream (42) and determines whether the calculated number of image frames per second exceeds the reference value (for example, 30 fps) (44).

If the calculated number of image frames per second exceeds the reference value, since the image is naturally reproducible, the data stream is transmitted to the portable device 3 (46).

However, if the calculated number of image frames per second does not reach the reference value, the image is broken or dumped. Therefore, the remote server 2 transmits a data stream to the wireless door phone 1 to include a low-resolution image "(48).

In response to the request signal, the wireless door phone 1 generates a data stream so as to include a lower resolution image and transmits the data stream to the remote server 2. Therefore, , 42, 44), the process proceeds to step 46.

6 is a flowchart showing another example of a stream control method of a wireless door phone.

6 shows a flow in which the remote server 2 requests a low-resolution image to the wireless door phone 1 side to control the stream of the wireless door phone by the remote server 2 as in the embodiment of Fig. 5 have.

However, the difference from the embodiment of FIG. 5 is that the step of the low resolution image is limited, and even when the lowest resolution image is transmitted, if the number of image frames per second does not reach the reference value, And the stream is transmitted to the portable device 3.

This is based on the fact that there is a limit to the resolution that can be reduced, no matter how many levels of resolution are distinguished. For example, if the primary image of the first stage transmitted by the remote door phone is an image of 1920 x 1080 pixels (high resolution), the second step is 1280 x 720 pixels (medium resolution), the third step is 720 x 480 pixels ), And the fourth step is 640 x 480 pixels (lowest resolution).

First, the remote server 2 receives a data stream from the wireless door phone 1 (50).

The remote server 2 receiving the data stream calculates the number of image frames per second (per second) in the received data stream (52) and determines whether the calculated number of image frames per second exceeds the reference value (e.g., 30 fps) (54).

If the calculated number of image frames per second exceeds the reference value, since the image is naturally reproducible, the data stream is transmitted to the portable device 3 (56).

However, if the calculated number of image frames per second does not reach the reference value, the image is broken or dumped. Therefore, the remote server 2 determines whether the wireless door phone can generate a lower resolution image (58 ) Transmits a signal requesting to transmit the data stream to the wireless door phone 1 to include a low-resolution image (59).

In response to the request signal, the wireless door phone 1 generates a data stream to include a lower resolution image and transmits the data stream to the remote server 2. Accordingly, if the number of image frames per second does not satisfy the reference value, the wireless door phone 1 ), The medium resolution image, the low resolution image, and the lowest resolution image are sequentially included in the data stream and transmitted.

If the lowest resolution image is received, the lower resolution image can not be generated. Therefore, in step 58, the remote server 2 transmits the data stream to the portable device 3 in the state of the lowest resolution image .

7 is a flowchart showing another example of a stream control method of a wireless door phone.

7, the remote server 2 requests a low-resolution image to the wireless door phone 1, as in the embodiment of Figs. 5 and 6, so that the stream of the wireless door phone is controlled by the remote server 2 Respectively.

However, the difference from the embodiment of FIGS. 5 and 6 is that the step of the low-resolution image is limited, and even when the lowest resolution image is transmitted, if the number of image frames per second does not reach the reference value, And ends the operation without performing the operation.

This is because, if the image resolution is lowered to reduce the resolution of the image and the number of image frames per second does not reach the reference value, it is determined that normal communication is impossible and it is preferable not to proceed further.

According to the embodiment of FIG. 7, after the operation is completed, the communication environment is improved as time elapses, and then the reception of the basic image (high resolution) stream of the first step from the door phone can be resumed. First, the remote server 2 receives a data stream from the wireless door phone 1 (50).

The remote server 2 receiving the data stream calculates the number of image frames per second (per second) in the received data stream (52) and determines whether the calculated number of image frames per second exceeds the reference value (e.g., 30 fps) (54).

If the calculated number of image frames per second exceeds the reference value, since the image is naturally reproducible, the data stream is transmitted to the portable device 3 (56).

However, if the calculated number of image frames per second does not reach the reference value, the image is broken or dumped. Therefore, the remote server 2 determines whether the wireless door phone can generate a lower resolution image (58 ) Transmits a signal requesting the wireless door phone 1 side to "transmit a data stream to include a low-resolution image" (59).

In response to the request signal, the wireless door phone 1 generates a data stream to include a lower resolution image and transmits the data stream to the remote server 2. Accordingly, if the number of image frames per second does not satisfy the reference value, the wireless door phone 1 ), The medium resolution image, the low resolution image, and the lowest resolution image are sequentially included in the data stream and transmitted.

If the lowest resolution image is received, the lower resolution image can not be generated. Therefore, in step 57, the remote server 2 transmits the data stream instead of the stream to the portable device 3 The procedure is terminated. In this case, it is also possible to transmit a command signal to the wireless door phone 1 and / or the portable device 3 to display a message "Try again later because the communication state is bad ".

8 is a flowchart showing another example of a stream control method of a wireless door phone.

8, the remote server 2 requests a low-resolution image to the wireless door phone 1, as in the embodiments of Figs. 5, 6 and 7, so that the remote server 2 transmits the stream of the wireless door phone 1 Fig.

5, FIG. 6, and FIG. 7, a limitation is imposed on the step of the low-resolution image, so that even when the lowest resolution image is transmitted, if the number of image frames per second is less than the reference value, And transmits the data stream including only the data stream to the portable device 3.

This is based on the fact that it is necessary to be able to deliver only audio if normal reproduction can not be performed even when a low resolution image is transmitted. For example, if the primary image of the first stage transmitted by the remote door phone is an image of 1920 x 1080 pixels (high resolution), the second step is 1280 x 720 pixels (medium resolution), the third step is 720 x 480 pixels ), The fourth step is 640 x 480 pixels (lowest resolution), and the lowest resolution image of the fourth step also has a lower number of frames per second than the reference value, a stream containing only voice is generated in the wireless door phone 1, (2).

First, the remote server 2 receives a data stream from the wireless door phone 1 (60).

The remote server 2 that has received the data stream determines whether the received data stream includes video data (61).

If the data stream contains video data, the remote server 2 calculates (62) the number of video frames per unit time (per second) in the received data stream, and the calculated number of video frames per second (e.g., 30 fps) (64).

If the calculated number of image frames per second exceeds the reference value, since the image is naturally reproducible, the data stream is transmitted to the portable device 3 (66).

However, if the calculated number of image frames per second does not reach the reference value, the remote server 2 determines whether the wireless door phone is capable of generating a lower resolution image (step 67), since the image is broken or dumped. (68) a signal requesting that the wireless door phone 1 side transmit the data stream so as to include a low-resolution image, if possible.

In response to the request signal, the wireless door phone 1 generates a data stream to include a lower resolution image and transmits the data stream to the remote server 2. Accordingly, if the number of image frames per second does not satisfy the reference value, the wireless door phone 1 ), The medium resolution image, the low resolution image, and the lowest resolution image are sequentially included in the data stream and transmitted.

However, when the lowest resolution image is received in step 67, since the lower resolution image can not be generated, the remote server 2 transmits a signal requesting transmission of the non-video stream to the wireless door phone 1 (69).

When the wireless door phone 1 transmits a stream of only audio data that does not include video data in accordance with such a request, the remote server 2 via the steps 60 and 61 transmits the data stream To the portable device (66).

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, . Therefore, it should be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

One . . . . . . Wireless door phone
2 . . . . . . Remote server
3. . . . . . Mobile devices
10. . . . . . Camera part
11. . . . . . Microphone part
12. . . . . . The memory unit
13. . . . . . The control unit
14. . . . . . The stream processor
15. . . . . . Communication section
16. . . . . . draw
20. . . . . . Communication section
21. . . . . . The frame-
22. . . . . . The memory unit
23. . . . . . The stream transmission unit
24. . . . . . The control unit
30. . . . . . Communication section
31. . . . . .
32. . . . . . The stream processor
33. . . . . . Image display section
34. . . . . . Audio output unit
35. . . . . . The control unit

Claims (13)

A stream processing unit for encoding in real time a video shot by the camera unit and a voice recorded in the microphone unit, and generating a data stream including the encoded video and the encoded audio;
Wherein when the first command signal is received from the remote server, the image captured by the camera unit after receiving the first command signal is encoded with a resolution lower than that of the encoded image before the first command signal is received, A control unit for controlling the stream processing unit to receive the second command signal from the remote server and to control the stream processing unit so that the data stream includes only the audio recorded in the microphone unit after receiving the second command signal, ; And
And a communication unit for transmitting the data stream to the remote server and receiving the command signal from the remote server.
The method according to claim 1,
Wherein the first command signal is defined as a signal that instructs to lower the resolution of the encoded image.
The method according to claim 1,
Wherein the second command signal is defined as a signal indicating that the data stream includes only the encoded voice.
The method according to claim 1,
And an opening / closing device that is opened and closed in accordance with a control signal of the control unit.
A frame calculation unit for calculating the number of frames per unit time of the image included in the data stream received from the wireless door phone and comparing the number of frames per unit time with the reference number of frames; And
And a controller for transmitting a first command signal to the wireless door phone through a communication unit, the first command signal indicating that the resolution of an encoded image is lowered when the number of frames per unit time is less than the reference frame number, .
6. The method of claim 5,
A wireless door phone for transmitting a second command signal through the communication unit to the wireless door phone, the second command signal indicating that the data stream includes only the encoded voice when the resolution of the image included in the data stream can not be lowered; / RTI >
6. The method of claim 5,
And a stream transmission unit for transmitting the data stream to the portable device in response to a request from the portable device.
The wireless door phone real-time encoding the video image taken by the camera unit and the voice recorded by the microphone unit;
The wireless door phone generating a data stream comprising an encoded image and an encoded voice; And
The wireless door phone transmitting the data stream to the remote server,
When the first command signal is received from the remote server, the image captured by the camera unit after the wireless door phone receives the first command signal is lower than the encoded image before the first command signal is received And generates a data stream including only audio recorded in the microphone unit after receiving the second command signal when the second command signal is received from the remote server, Control method.
9. The method of claim 8,
The wireless door phone storing at least one of the encoded image, the encoded voice, and the data stream in a memory unit.
The remote server receiving a data stream from a wireless door phone;
If the data stream includes an image, the remote server calculates the number of frames per unit time of the image and compares the number of frames per unit time with the number of reference frames;
And transmitting a first command signal to the remote door server to the wireless door phone, the first command signal instructing to lower the resolution of the encoded image when the number of frames per unit time is less than the reference frame number Way.
11. The method of claim 10,
And determining whether the resolution of the image included in the data stream can not be lowered.
12. The method of claim 11,
Transmitting a second command signal through the communication unit to the wireless door phone indicating that the data stream includes only the encoded voice when the resolution of the video included in the data stream can not be lowered; Further comprising the steps of:
11. The method of claim 10,
And transmitting the data stream to the portable device in response to a request from the portable device.
KR1020150191413A 2015-12-31 2015-12-31 Wireless doorphone and apparatus and method for controlling stream thereof KR20170080156A (en)

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PCT/KR2016/015467 WO2017116157A1 (en) 2015-12-31 2016-12-29 Wireless door phone, and wireless door phone stream control apparatus and control method

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US6014694A (en) * 1997-06-26 2000-01-11 Citrix Systems, Inc. System for adaptive video/audio transport over a network
KR100622671B1 (en) * 2004-12-21 2006-09-19 한국전자통신연구원 Platform-independent remote control system of home devices and method thereof
KR20100067887A (en) * 2008-12-12 2010-06-22 김동희 Security apparatus for watching out-of-frontdoors
JP5399144B2 (en) * 2009-06-29 2014-01-29 アイホン株式会社 Intercom device
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