KR20240051765A - CCTV camera for video calls - Google Patents

Abstract

A CCTV system capable of two-way video calls equipped with an LCD display is launched. A CCTV system capable of two-way video calls equipped with an LCD display is a CCTV system linked to an on-site camera terminal equipped with a camera, speaker, microphone, sensor, and LCD display. It is equipped to display public service announcements and news, IP multicasting of video/image/text from the control server to multiple field camera terminal devices, text message TTS conversion from the remote control server of the field camera terminal device, speaker output, emergency bell, and control PC. It provides two-way video calls using RTP/UDP/IP through (camera, microphone, speaker) and control server.

Description

CCTV camera for video calls {CCTV camera for video calls}

The present invention relates to a CCTV system capable of two-way video communication equipped with an LCD display. More specifically, the present invention relates to a CCTV system linked to a field camera terminal device equipped with a camera, speaker, microphone, sensor, and LCD display. It is equipped with an LCD display linked to the field camera terminal device, displays fine dust concentration and temperature on the LCD display, displays public service advertisements and news, and sends video/image/text from the control server to multiple field camera terminal devices through IP. Multicasting, text message from the remote control server of the field camera terminal device, TTS conversion speaker output function, emergency bell function, LCD display that provides two-way video call function using RTP/UDP/IP with the control PC (camera, microphone, speaker) This is about a CCTV system equipped with a two-way video call.

A CCTV system consists of multiple cameras that shoot video, a DVR (Digital Video Recorder) or NVR (Network Video Recorder) that is connected to multiple cameras with a UTP cable and compresses the video data from each camera and stores it on a hard disk. Or, it consists of hard disk storage connected to the NVR, and can receive video and audio from each camera channel through a communication network.

The information is transmitted to the control center monitoring server, and remote CCTV camera monitoring is performed through the multiviewer screen of the monitoring PC connected to the control center monitoring server.

CCTV cameras include fixed cameras, dome cameras, PTZ (Pan Tilt Zoom) cameras, and dome infrared cameras equipped with infrared LEDs that film at night.

Cameras include a lens, a camera, and a power supply, and have a dome or top cover-type camera housing that covers them, and are classified into fixed cameras and rotating cameras.

PTZ cameras have PTZ (Pan, Tilt, Zoom) control functions. Pan is a function that fixes the camera position and moves the camera left and right, Tilt (tilt up, tilt down) is a function that moves the camera up and down, and Zoom is a function that moves the camera up and down. in/out provides the function to reduce/enlarge the video screen by focusing the camera's focal length to a near or far distance. DVR (Digital Video Recorder) is a digital video recording storage device that encodes video captured by multiple cameras connected by cables within a distance of 1.7 km, stores it on a hard disk, and distributes and displays video for each camera channel on the screen. It is equipped with a transition switch, screen splitter, VCR (video player) sensor, and alarm controller. NVR is a dedicated PC for recording, monitoring, event management, and playback of video from cameras or video servers installed on the network.

It is a server that receives digital video through an IP camera, compresses it, and stores it. Since it is an IP-only storage device, there is no need for a device to convert analog camera video signals to digital camera video signals, and it is a device that replaces existing digital video recorders (DVRs). am.

Referring to Figure 1, a DVR system equipped with existing CCTV and sensors includes at least one camera 710 that captures CCTV images of a surveillance area; A sensor (712) that detects heat in the event of a fire; A hard drive connected to the at least one camera 710 and the sensor 712, assigned a device ID, connected to at least one camera that captures images of the surveillance area, and storing image data recorded from the cameras. A DVR (720) with a built-in disk, connected to the DVR (720), and a computer and HD monitor (723) that outputs output through the screen splitter of each CCTV camera in the surveillance area. Connected to the DVR (720), and a camera in the surveillance area. From at least one camera in the surveillance area and the control center server 740, which monitors the video of the intrusion, generates an alarm on the control PC when an intrusion is detected, and transmits the intrusion alarm to the mobile communication terminal 780 of the set mobile phone number. It includes a control PC (790) equipped with a DVR card installed with a screen splitter client for CMS monitoring of recorded CCTV images. The sensor (712) includes a door magnet detector, human body detection sensor (PIR sensor), and sound wave detection. Any one of sensors, wireless door sensors, and fire detection sensors can be used. As prior art 1 related to this, "Thermal camera with heat detection function in IP camera network environment and CCTV system using the same" has been registered. there is. A thermal camera that converts thermal images captured with a thermal camera in an IP camera network environment into RTSP packets and transmits them to a storage device in an IP camera network environment using the RTSP (Real-Time Streaming Protocol) standard, and a monitoring system using the thermal camera. The thermal image captured by the IP camera and the thermal image captured by the thermal camera are monitored together, and the thermal camera is equipped with temperature analysis software to monitor temperature values according to the situation. Thermal imager is equipped with a heat detection function in an IP camera network environment. A CCTV system using cameras is registered. It is possible to easily configure a thermal camera at any time in an already established IP camera network environment, and there is no need to build a separate thermal camera network environment, thereby reducing cost, time, and effort.

The purpose of the CCTV system with fire detection function is to provide a fire detection system using CCTV that detects fire occurrence with high accuracy by comparing and analyzing captured images, that is, two or more cameras can be used to acquire smog images and fire images. A fire detection camera unit equipped with a fire detection camera unit, which detects whether a fire has occurred by comparing the images of the fire detection camera unit that outputs smog images and fire images and the fire detection camera unit that does not input smog images and fire images. A fire image comparison detection unit, a user transmission unit and fire confirmation unit that sends the user to confirm the presence or absence of a fire detected through the fire image comparison detection unit, and a fire notification unit that transmits a fire notification signal when a fire recognition signal is received or no signal is received. We provide a CCTV system with a fire detection function consisting of a fire alarm unit that notifies a fire alarm, and fire detection is conveniently performed using existing CCTV without the need for separate sensor equipment. Two or more fire detection camera units are provided. We provide a CCTV system and its control method with a fire detection function that detects fire occurrence with high accuracy by comparing images and increases the ability to determine whether a fire exists through user confirmation. However, existing CCTV systems are provided. The system was capable of detecting fire and heat, but did not provide fine dust measurement or temperature measurement functions. It was equipped with a camera, microphone, and sensor connected to a separate camera terminal, but did not use an LCD display provided in a separate camera terminal. It did not provide public service announcements/news, and did not provide a TTS conversion speaker output function by receiving text from the control server.

The purpose of the present invention to solve the above problems is to provide an LCD display linked to a field camera terminal device on a streetlight support in a CCTV system linked to a field camera terminal device including a camera, speaker, microphone, sensor, and LCD display. , Displays fine dust concentration and temperature on the LCD display, displays public service announcements and news, IP multicasting of video/image/text from the control server to multiple field camera terminal devices, and text from the remote control server of the field camera terminal device. Provides a CCTV system capable of two-way video calls with an LCD display that provides two-way video calls using RTP/UDP/IP with the control PC (camera, microphone, speaker) as message TTS conversion speaker output function and emergency bell function. Another object of the present invention is to enable a two-way video call equipped with an LCD display to achieve the object of the present invention.

Provides a method of providing CCTV system services.

In order to achieve the purpose of the present invention, a CCTV system capable of two-way video calls equipped with an LCD display is assigned a device ID and IP address, and is connected to a camera, speaker, microphone, and at least one sensor provided on a street light pole. It is linked to one or more field camera terminals and multiple field camera terminals connected to an LCD display that displays fine dust concentration and temperature and displays public service announcements or news received from the control server, and is connected to a plurality of video storage servers and It is linked, transmits video/images/text to a plurality of field camera terminal devices by IP multicasting, and includes a control server that performs CCTV monitoring (VMS), and the field camera terminal device is connected to an embedded processor and is connected to a UTP cable or optical It is provided with a communication unit connected to the control server of the control center through a cable, the sensor includes a fine dust measurement sensor and a temperature sensor, and the control server provides public service advertisements and news through one or more field camera terminal devices. It includes a public service announcement/news provision unit, and the field camera terminal device includes a camera that captures an image; Speaker that outputs voice signals and receives voice signals

mike; One or more sensors that measure fine dust concentration and temperature are connected to the camera, the speaker, the microphone, and the one or more sensors, and periodically display one or more measured sensor data, such as fine dust concentration and temperature, on the LCD display and An embedded processor that transmits sensor data measured at time intervals and video and audio data from cameras in real time to the control server. Connected to the embedded processor, a storage unit where the driving program is stored. Connected to the embedded processor, fine dust concentration and It includes an LCD display that displays temperature and displays public service announcements or news received from the control server, and a communication unit connected to the embedded processor and connected to the control server of the control center through a UTP cable or optical cable.

The field camera terminal device includes a TTS conversion unit that converts text received from the remote control server to TTS and outputs the text-converted voice through a speaker. The field camera terminal device includes a bell, a camera, and a microphone. It further includes an emergency bell equipped with a speaker, and transmits and receives two-way video call data using RTP/UDP/IP or SRTP (Secure RTP) through the emergency bell, a control PC (camera, microphone, speaker), and a control server, When using SRTP (Secure RTP), encryption/decryption is applied to the video and voice data of the RTP payload. The one or more sensors are a fine dust measurement sensor that measures the concentration of fine dust around the field camera terminal device.

The one or more sensors include a temperature sensor that measures the temperature around the field camera terminal device. The control server monitors images of a plurality of field camera terminal devices, and includes a plurality of image storage servers and A TTS text transmission unit that transmits text from the control server according to the characteristics and events of the surveillance area to one or multiple field camera terminal devices connected to the CCTV monitoring unit; A public service announcement/news provision department that provides public service announcements and news through multiple on-site camera terminals; and an IP multicasting unit that transmits video, images, and text to a plurality of field camera terminal devices by IP multicast (IPv4 ClassD), wherein the control server stores and distributes video of each camera channel. It is linked with. In order to achieve another purpose of the present invention, a CCTV system capable of two-way video communication with an LCD display is provided.

The method of providing security is to transmit image data from cameras of field camera terminal devices equipped with speakers, microphones, sensors, and LCD displays installed on streetlight poles in various regions and the fine dust concentration and temperature of one or more sensors to the control server. Displaying as a client of the control PC, displaying fine dust concentration and temperature on the LCD display of the field camera terminal device, and displaying public service advertisements and news transmitted from the control server; And transmitting the video/image/text of the control server to a plurality of field camera terminal devices through IP multicasting to be displayed on the LCD display of the plurality of field camera terminal devices, wherein the field camera terminal device includes an embedded processor. It is connected to and has a communication unit connected to the control server of the control center through a UTP cable or optical cable, the sensor includes a fine dust measurement sensor and a temperature sensor, and the control server is one or more field camera terminal devices. It includes a public service announcement/news provision unit that provides public service announcements and news, and the field camera terminal device includes a camera that takes video, a speaker that outputs an audio signal, a microphone that receives an audio signal, and one or more devices that measure fine dust concentration and temperature. The sensor is connected to the camera, the speaker, the microphone, and the one or more sensors, and periodically displays one or more measured sensor data, such as fine dust concentration and temperature, on the LCD display and displays sensor data measured at regular time intervals in real time. An embedded processor that transmits video and audio data from the camera to the control server. Connected to the embedded processor, a storage unit that stores the driving program. Connected to the embedded processor, displays fine dust concentration and temperature, and receives data from the control server. It is connected to an LCD display that displays public service announcements or news and to the embedded processor, using a UTP cable or optical cable.

It includes a communication unit connected to the control server of the control center through a cable. The method transmits text from the control server to the on-site camera terminal device, and the on-site camera terminal device converts the text received from the remote control server to TTS. It further includes the step of outputting a speaker. The method further includes the step of displaying public service announcements and news on an LCD display linked to a field camera terminal device equipped with a speaker, microphone, sensor, and LCD display. Two-way video call data using RTP/UDP/IP or SRTP (Secure RTP) is transmitted through the bell of the field camera terminal device, an emergency bell equipped with a camera, microphone, and speaker, a control PC (camera, microphone, speaker), and a control server. It transmits and receives, and when using SRTP (Secure RTP), it further includes the step of applying encryption/decryption to the video and voice data of the RTP payload.

The CCTV system capable of two-way video communication with an LCD display according to the present invention is a CCTV system linked to a camera terminal device equipped with a camera, speaker, microphone, sensor, and LCD display, and is linked to an on-site camera terminal device on a streetlight support pole. Equipped with an LCD display, it displays fine dust concentration and temperature on the LCD display, displays public service announcements and news, IP multicasting of video/image/text from the control server to multiple field camera terminal devices, and remote control of field camera terminal devices. The control server's text message TTS conversion speaker output function and emergency bell function are effective in providing a two-way video call function using the control PC (camera, microphone, speaker) and RTP/UDP/IP.

Figure 1 is a configuration diagram of an analog DVR system equipped with existing CCTV and sensors.
Figure 2 is a diagram showing the configuration of a CCTV system capable of two-way video calls equipped with an LCD display according to the present invention. Figure 3 is a diagram showing the internal configuration of a field camera terminal device installed in various locations. Figure 4a is a communication protocol of the field camera terminal device. This is a drawing showing.
Figure 4b is a diagram showing the structure of IP/UDP/RTP/video and voice data and the RTP packet structure of the RTP media packet transmission protocol that transmits video/audio packet data.
Figure 5 is a flowchart showing a service provision method of a CCTV system capable of two-way video calls equipped with an LCD display according to an embodiment of the present invention. Figures 6 and 7 are field diagrams connected to cameras, speakers, microphones, sensors, and LCD displays. This is a photo of a CCTV installation including a camera terminal device.

The configuration and operation of the preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description will be omitted. In addition, the attached drawing numbers are different when indicating the same configuration.

The same drawing number is assigned to different drawings. The present invention is a CCTV system equipped with a camera, a microphone, a speaker, a fine dust measurement sensor, and a temperature sensor in an on-site camera terminal device, and the fine dust concentration (μg/ ) and temperature (℃) are displayed on an LCD display linked to the on-site camera terminal device. displays and outputs public service advertisements and news information transmitted from the control server.

The display uses an LCD display, and the LCD display connected to the field camera terminal device displays fine dust concentration and temperature, and displays public service announcements and news transmitted from the control server to the field camera terminal device. The field camera terminal device is a PC. , IoT devices, cameras, microphones, speakers, fine dust measurement sensors, temperature sensors, and LCD displays are connected to the embedded processor of the embedded system. Figure 2 is a diagram showing the configuration of a CCTV system capable of two-way video calls equipped with an LCD display according to the present invention.

6 and 7 are photos of a CCTV installation including a camera, a speaker, a microphone, a sensor, and an on-site camera terminal connected to an LCD display. The CCTV system capable of two-way video calls equipped with an LCD display of the present invention includes a camera, a speaker, Microphones, sensors and

In a CCTV system linked to an on-site camera terminal device equipped with an LCD display, an LCD display connected to the on-site camera terminal device is installed on a streetlight support pole, and fine dust concentration (μg/ ) and temperature (°C) are displayed on the LCD display, thereby providing public interest. Displays advertisements and news, and sends videos/images/text from the control PC (707) to multiple users through the control server (700).

IP multicasting to field camera terminal devices, text message TTS conversion speaker output function to one or more field camera terminal devices (100), emergency bell function using control PC (camera, microphone, speaker) and RTP/UDP/IP It provides a two-way video call function. When the emergency bell of the field camera terminal device 100 is pressed, RTP/RTCP or It provides two-way video calls using video and voice data using the Secure RTP/RTCP protocol, and provides text (text: 'This is a no-parking area', 'This is a no-parking area') sent from the control server (700) to the field camera terminal device (100). The voice converted into text through the TTS conversion output function of the TTS conversion unit 102 of 'This is a no-dumping area', 'This is a no-smoking area', 'This is a military protection area' is sent to the field camera terminal device 100. It is output to the speaker 117. The control server 700 has a plurality of video storage servers (VMS servers - RTSP servers) that store and distribute the video of each camera channel that supports ONVIF or RTSP client of the control PC and RTSP protocol. )(710, 711, 712, 713). The media player of the client (RTSP client) and the video storage server (RTSP server) use the RTSP protocol to play streaming media.

- Setup, Play, Forward, Rewind, Pause, Stop, Resume, Record, Teardown control PC (707) Equipped with an RTSP client and connected to a video storage server (RTSP server), CCTV monitoring of cameras installed in various regions, CCTV monitoring of video data in each region using the RTSP client/RTSP server method supporting ONVIF or RTSP protocols, The sensor's fine dust concentration (μg/ ) and temperature (℃) measured in each area are displayed, and two-way video calls with an emergency bell and control PC are provided using RTP/RTCP or SRTP (Secure RTP) technology. When using SRTP, encryption/decryption is applied to video and audio data in the RTP payload. It uses high-performance compression codecs such as video codec H.264 and H.265 encoding/decoding, audio codec AAC, and MP3 (MPEG Audio Layer-3) codec, and provides IPmulticasting (IPv4 Class D) function. The LCD display of the present invention A CCTV system capable of two-way video calls is assigned a device ID and IP address, is connected to a camera, speaker, microphone, and at least one sensor installed on a street light pole, and measures fine dust concentration (μg/) and temperature. One or more field camera terminal devices 100 that display (℃) and are linked to an LCD display that displays public service announcements or news received from the control server; and a plurality of field camera terminal devices (100) installed in various regions, and a plurality of video storage servers (710, 711, 712, 713), and transmit video/image/text to a plurality of field camera terminal devices (100) through IP multicasting. It includes a control server 700 that transmits and performs CCTV monitoring (VMS), and the field camera terminal device is connected to an embedded processor and has a communication unit connected to the control server of the control center through a UTP cable or optical cable. ,The sensor includes a fine dust measurement sensor and a temperature sensor, and the control server 700 includes a public service advertisement/news provision unit that provides public service advertisements and news through a plurality of field camera terminal devices, a camera and a speaker, Public service announcements and news are displayed on an LCD display linked to a field camera terminal device equipped with a microphone, a sensor, and an LCD display. The field camera terminal device includes a camera that captures images; A speaker that outputs an audio signal. A microphone that receives an audio signal. One or more sensors that measure fine dust concentration and temperature. Connected to the camera, the speaker, the microphone, and the one or more sensors, and periodically measuring one or more sensor data. An embedded processor that displays dust concentration and temperature on the LCD display and transmits sensor data measured at regular time intervals and video and audio data from cameras in real time to the control server. A storage device connected to the embedded processor and storing the driving program. An LCD display that is connected to the embedded processor, displays fine dust concentration and temperature, and displays public service announcements or news received from the control server, and is connected to the embedded processor and controls the control center through a UTP cable or optical cable. It includes a communication unit connected to the server. The control server 700 is a VMS (Video Management System) for monitoring cameras installed in various areas and is linked to a plurality of video storage servers 710, 711, 712, and 713. Field camera terminal devices include cameras, microphones, and fine remote control devices in embedded processors of PCs, IoT devices, and embedded systems.

The data measurement sensor, temperature sensor, and LCD display are connected. The field camera terminal device 100 converts the text received from the remote control server 700 into a text-to-speech (TTS) converted voice signal. It includes a TTS conversion unit 102 that outputs to a speaker. The field camera terminal device 100 further includes an emergency bell 140 equipped with a bell, a camera, a microphone, and a speaker, and a street light support stand. Two-way video call using RTP/UDP/IP or SRTP (Secure RTP) through the emergency bell and control PC (camera, microphone, speaker) (707) and control server as an emergency bell function of the field camera terminal device (100) installed in the field. It provides a two-way video call function by sending and receiving data. Figure 3 is a diagram showing the internal configuration of a field camera terminal device installed in various locations. The field camera terminal device 100 is a camera 112 that captures video and TTS-converted voice. A speaker 117 that outputs a signal, a microphone 119 that receives an audio signal, one or more sensors 110, 111 that measure fine dust concentration and temperature, the camera 112, the speaker 117, and the microphone 119. , is connected to the one or more sensors 110, 111, displays one or more measured sensor data (fine dust concentration, temperature) on the LCD display, and measures the data at regular time intervals.

Data (fine dust concentration, temperature) and video and audio data from the camera are transmitted in real time to the control server 700, and text received from the control server 700 at a remote location is converted to TTS and has a speaker output function. Embedded processor provided (101)

A storage unit 103 connected to the embedded processor 101 and storing a driving program;

It is connected to the embedded processor 101 and an LCD display 104 that displays public service advertisements or news received from the control server 700. It is connected to the embedded processor 101 and is connected to the control center via a UTP cable or optical cable. It includes a communication unit 105 connected to the control server 700. The field camera terminal device includes a TTS conversion unit that converts text received from the remote control server to TTS and outputs the text-converted voice to a speaker. It further includes. The one or more sensors include a fine dust measurement sensor 110 that measures the concentration of fine dust around the field camera terminal device.

The one or more sensors include a temperature sensor 111 that measures the temperature around the field camera terminal device. The control server 700 monitors the video and audio of the plurality of field camera terminal devices 100 and A CCTV monitoring unit 701 that monitors sensor data (fine dust concentration, temperature) and is linked to a plurality of image storage servers; A TTS text transmission unit (702) that transmits text from the control server according to the characteristics and events of the surveillance area to one or more field camera terminal devices. A public service advertisement that provides public service announcements and news to a plurality of field camera terminal devices. /News provider 703 and an IP multicasting unit 704 that transmits video, images, and text to a plurality of field camera terminal devices 100 by IP multicast (IPv4 Class D) and a plurality of field camera terminal devices 100 ) and a database (DB) 708 that stores information on the device ID, IP address, camera, speaker, microphone, and sensor installation area, and the control server records video from each camera channel that supports ONVIF or RTSP protocol. It is linked to a plurality of video storage servers (VMS servers) (710, 711, 712, 713) that store and distribute. The control PC (707) is equipped with an RTSP client and connected to a video storage server (RTSP server), monitors CCTV of cameras installed in various regions, and records video from each region through an RTSP client/RTSP server method that supports ONVIF or RTSP protocols. Voice data is monitored, and the fine dust concentration (㎛/ ) and temperature (℃) of sensors measured in each area are displayed, and the control PC equipped with an emergency alarm, camera, and microphone uses RTP/RTCP or Two-way video calls are provided using SRTP (Secure RTP) technology. FIGS. 4A and 4B are diagrams showing the communication protocol of the field camera terminal device. When the emergency bell is pressed, the emergency bell of the field camera terminal device 100 Provides two-way video calls using video and voice data using RTP/RTCP or Secure RTP/RTCP protocols through (140), control PC (707), and control server (700), and provides on-site camera terminals from the control server (700) TTS conversion output function of the text (text: 'This is a no-parking area', 'This is a no-littering area', 'This is a no-smoking area', 'This is a military protection area') transmitted to the device 100. It is output to the speaker 117 of the field camera terminal device 100. RTP (real-time transport protocol) is a session layer protocol that transmits and receives voice/video packet data in real time along with RTCP (RTP control protocol). As a protocol, RTP packets (video and voice data of RTP payload) are transmitted and received on the UDP/IP socket on the optical cable (SMF, single mode fiber), Ethernet, Wi-Fi, and WLAN data link layer. The sender can synchronize synchronized playback playback based on the time stamp and give up packets with large packet delay. In addition, the receiver checks the transmission packet delay or bandwidth, notifies the upper layer application on the transmitter using RTCP, and adjusts the coding rate to control QoS.

You can. The QoS control unit can control jitter, packet delay, and packet loss on the RTP/RTCP layer. RTP supports unicasting or multicasting. RTCP monitor monitors RTP packets, extracts QoS values related to packet loss, jitter, and round trip delay, and uses a timestamp method to sort the order of irregularly received data. Use . RTP/RTCP supports synchronized playback,

Supports security. Figure 4b is a diagram showing the structure of IP/UDP/RTP/video and voice data and the RTP packet structure of the RTP media packet transmission protocol that transmits video/voice packet data. The RTP session uses the RTP protocol. It is a logical unidirectional connection session formed on both the sending and receiving sides. In an RTP session, destination confirmation is identified with one IP address and one pair of RTP/RTCP numbers, and the IP address is a unicast address or multicast address.

Address is used. RTP is a media packet transmission protocol that transmits video and voice packet data over IP/UDP and consists of a 20-byte IP header, an 8-byte UDP header, a 12-byte RTP header, and RTP payload (audio and video data). do. UDPpayload consists of a 12-byte RTP header and RTP payload (audio and video data). RTP packets are classified into RTP header and RTP payload. RTP payload includes video and audio data. The structure of the RTP packet is explained with each field as follows.

ㅇ Control bits: 16 bits

- Ver: 2 bits

- P (padding): 1 bit

. If it is 1, there is padding data added to the end of the actual payload.

* - X (extension): 1 bit

. If 1, variable length header extension (Extension Header)

- CC (CSRC Count): 4 bits

. Number of CSRC (Countrybuting SouRCe) IDs that appear immediately after the basic header

. When multiple media are synthesized, the number is expressed as CC,

Indicated by SRRC ID to keep everyone in sync

- M (Marker): 1 bit

. Notification that an event has started occurring

ㅇ Payload type: (7 bit) Audio/video codec type

- audio type number/

. 0 -> G.711 AUDIO/PCMU(u-law audio), sampling frequency 8,000 Hz

. 3 -> GSM, sampling frequency 8,000 Hz

. 4 -> G.723, sampling frequency 8,000 Hz

. 6 -> DVI4 (ADPCM), sampling frequency 16,000 Hz

. 7 -> LPC, sampling frequency 8,000 Hz

. 8 -> G.711 PCM (A-Law) sampling frequency 8,000 Hz

. 9 -> G.722, sampling frequency 8,000 Hz

. 12 -> Audio/QCELP PureVoice QCELP audio

. 14 -> Audio/MPEG audio, sampling frequency 90,000 Hz

. 15 -> G.728, sampling frequency 8,000 Hz

- video type number

. 26 -> Image JPEG Motion JPEG video

. 31 -> Video/H.261 H.261 video

. 32 -> Video/MPEG video MPEG I/II video

. 33 -> MPEG-2 TS

Sequence Number: (16 bits)

- Packet loss detection and sequence reconstruction

. The initial value is random and increases by 1 for each packet.

..The receiving side detects packet loss and restores the reversed order rather than requesting packet retransmission.

Timestamp: (32 bit)

- Indicates the time relationship in which each RTP packet within the RTP stream was sampled

. Starting from a random initial value, it is increased by 1 by the counter.

The timestamp interval is based on the sampling interval determined by the pay load type.

. For most audio RTP packets

=> Set default time interval per packet to 20 ms

Example) G.711 (PCM A-Law) audio payload packet size

(payload codec data rate) x (time interval per packet)

(64 kbps G.711 codec) x (20 ms)

(8000 samples x 8 bits)/sec x (0.02 sec)

160 bytes

Distinguishing the meaning of continuity of timestamp values

Example 1) When the Timestamp values of a series of packets are ‘same’

Meaning that certain video scenes were sampled at the same time

Example 2) When the timestamp value of a series of packets ‘does not simply increase’

.. Like an MPEG screen picture, the time order is misaligned and from the front and back screens.

Meaning that it has been predicted Example 3) The timestamp value of a series of packets has a number sequence in which the timestamp value is ‘continuously increasing’. In case of audio packet flow, etc. Synchronization Sending Identifier (SSRC ID, Synchronization SouRCe ID): (32 bits) In RTP session A unique number that identifies the original source (original information stream). Within an RTP session, each origin is identified by a randomly selected SSRC ID. List of contributing origin identifiers (CSRC ID, Contributor SouRCe ID): (32 bits) multiple When media is mixed, the total number is specified in CC (CSRC Count: 4 bits). In addition to SSRC, identifiers for added streams are set as CSRC ID values.

If there is only one media source, CC=1 and the RTP header length is 12 bytes (default header length). In the end, the SSRC ID has one value, and the CSRC ID list becomes empty. RTP packet header extension (Extension Header): Optional RTP payload (voice and video data) RTP packets are classified into a 12-byte RTP header and RTP payload (video and voice data). Go-Back-N transmits multiple frames (RTP/UDP/IP video/voice packet data) with a sequence number, and the receiving side sends ACK or NACK to the transmitting side according to the sequence number, and NAK In this case, retransmission starts from the frame with the corresponding number. The RTP packet header indicates the sampled time, and the delay time can be calculated by referring to the arrival time at the receiving side and recorded in the time stamp field. On-site The emergency bell of the camera terminal device, the emergency bell equipped with a camera, microphone, and sifter, and the control PC linked to the control server provide two-way video calls.

A step of A/V encoding the video data and audio data by the camera and microphone, respectively, by the encoder of the A/V codec and storing them in the send buffer. By the RTP/RTCP protocol, from the sender to the receiver. (receiver) The step of transmitting RTP/UDP/IP video/voice packet data through a socket through a wired or wireless communication network (Ethernet, UTP cable, Optical cable, Wi-Fi, LTE 4G/5G). Receiving buffer on the receiving side (receive) buffer), A/V decoding by the A/V codec decoder, and outputting video and audio to the video/audio player of the user terminal. Figure 5 shows the LCD display according to an embodiment of the present invention. Service provision of a CCTV system capable of two-way video calls

This is a flowchart showing the method. The service provision method of a CCTV system capable of two-way video calls equipped with an LCD display of the present invention includes a camera, speaker, microphone, sensor, and LCD display installed on streetlight poles in various areas. The image data from the camera of the field camera terminal device and the fine dust concentration and temperature of one or more sensors are transmitted to the control server and displayed as a client on the control PC, and the fine dust concentration and temperature are displayed on the LCD display of the field camera terminal device. Displaying public service advertisements and news transmitted from the control server (S10); A step (S20) of transmitting the video/image/text of the control server to a plurality of field camera terminal devices via IP multicasting (IPv4 Class D) and displaying the video/image/text on the LCD display of the plurality of field camera terminal devices, The field camera terminal device is connected to an embedded processor and has a communication unit connected to the control server of the control center through a UTP cable or optical cable, and the sensor includes a fine dust measurement sensor and a temperature sensor, and the control server Includes a public service announcement/news provider that provides public service announcements and news through one or more field camera terminal devices, wherein the field camera terminal device includes a camera that captures images; A speaker that outputs an audio signal A microphone that receives an audio signal One or more sensors that measure fine dust concentration and temperature The camera, the speaker, the microphone, the

It is connected to one or more sensors, and periodically displays one or more measured sensor data, such as fine dust concentration and temperature, on the LCD display, and sends sensor data measured at regular time intervals and video and audio data from the camera in real time to the control server. The transmitting embedded processor is connected to the embedded processor and stores the running program.

Storage unit: an LCD display connected to the embedded processor, displaying fine dust concentration and temperature, and displaying public service advertisements or news received from the control server; and a communication unit connected to the embedded processor and connected to the control server of the control center through a UTP cable or optical cable. The method transmits a text from the control server to the field camera terminal device (S30), and sends a text to the field camera terminal device. The device further includes a step (S40) of converting text received from a remote control server into TTS by a TTS converter and outputting a voice converted into text to the speaker of the field camera terminal device 100. Control server 700 ) to the field camera terminal device 100 (text: 'This is a no-parking area', 'This is a no-littering area', 'This is a no-smoking area', 'This is a military protection area') The text-converted voice is converted to TTS by the TTS conversion unit 102 and output to the speaker 117 of the field camera terminal device 100. The method is performed in a field equipped with a camera, speaker, microphone, sensor, and LCD display. It further includes a step (S50) of displaying public service announcements and news on an LCD display linked to the camera terminal device. The method includes a bell of the field camera terminal device 100 and an emergency bell 140 equipped with a camera, microphone, and speaker. ), the emergency bell function uses the emergency bell and control PC (camera, microphone, speaker) and control server to send RTP/UDP/IP or

Two-way video call data is transmitted and received using the Secure RTP protocol, and when using SRTP (Secure RTP), a step (S54) in which encryption/decryption is applied to the video and voice data of the RTP payload is further included. When the emergency bell of the field camera terminal device 100 is pressed, the emergency bell 140 of the field camera terminal device 100 and the control

Video and voice data using RTP/RTCP or Secure RTP/RTCP protocols are used through the PC 707 and the control server. Two-way video calls are provided. Embodiments according to the present invention can be performed through various computer means. It may be implemented in the form of program instructions and recorded on a computer-readable recording medium. The computer-readable recording medium may include program instructions, data files, and data structures alone or in combination. Computer-readable recording media include storage, magnetic media such as hard disks, floppy disks, and magnetic tapes, optical media such as CD-ROMs and DVDs, and magnetic media such as floptical disks. Hardware devices configured to store and execute program instructions may be included in optical media, and storage media such as ROM, RAM, flash memory, etc. Examples of program instructions may include those produced by a compiler, machine language code, as well as high-level language code that can be executed by a computer using an interpreter. The hardware device may be configured to operate as one or more software modules to perform the operations of the present invention. As described above, the method of the present invention is implemented as a program and can be read using computer software.

It can be stored in a recording medium (CD-ROM, RAM, ROM, memory card, hard disk, magneto-optical disk, storage device, etc.). Although the present invention has been described with reference to specific embodiments, the present invention is not limited to the above. In order to illustrate the technical idea, it is not limited to the same configuration and operation as the specific embodiment, and can be implemented with various modifications without departing from the technical idea and scope of the present invention, and the scope of the present invention is described later. It must be determined by the scope of the patent claims.

100: Camera terminal device 102: TTS conversion unit
103: storage unit 104: LCD display
105: Communication unit 110: Fine dust sensor
111: temperature sensor 112: camera
117: Speaker 140: Emergency bell
700: Control server 701: CCTV monitoring unit
702: TTS text transmission department 703: Advertising/news provision department
704: IP multicasting unit 708: DB
707: PC (camera/microphone/speaker)
710, 711, 712, 713: Video storage server

Claims (7)

A device ID and IP address are assigned, and the LCD is connected to a camera, speaker, microphone, and at least one sensor installed on a streetlight pole, displays fine dust concentration and temperature, and displays public service announcements or news received from the control server. It is linked to one or more field camera terminal devices connected to the display and multiple field camera terminal devices, is linked to multiple video storage servers, transmits video/image/text to multiple field camera terminal devices through IP multicasting, and monitors CCTV. (VMS), the field camera terminal device is connected to an embedded processor, and has a communication unit connected to the control server of the control center through a UTP cable or optical cable, and the sensor measures fine dust. It includes a sensor, and a temperature sensor, and the control server includes a public service announcement/news provider that provides public service announcements and news to the one or more field camera terminal devices, and the field camera terminal device includes a camera that captures an image; A speaker that outputs an audio signal; A microphone that receives voice signals; one or more sensors that measure fine dust concentration and temperature; It is connected to the camera, the speaker, the microphone, and the one or more sensors, and periodically displays one or more measured sensor data, such as fine dust concentration and temperature, on the LCD display and displays the sensor data measured at regular time intervals in real time. an embedded processor that transmits video and audio data to the control server; A storage unit connected to the embedded processor and storing a driving program. An LCD display connected to the embedded processor, displaying fine dust concentration and temperature, and displaying public service announcements or news received from the control server. A CCTV system capable of two-way video calls equipped with an LCD display and a communication unit that is connected to the control server of the control center via UTP cable or optical cable. The field camera terminal device further includes a TTS conversion unit that converts text received from the remote control server to TTS and outputs the converted text through a speaker. A CCTV system capable of two-way video calls with an LCD display. The field camera terminal device further includes an emergency bell equipped with a bell, a camera, a microphone, and a speaker, and transmits RTP/UDP/IP or SRTP through the emergency bell, a control PC (camera, microphone, and speaker), and a control server. A CCTV capable of two-way video calls with an LCD display that transmits and receives two-way video call data using (Secure RTP), and when using SRTP (Secure RTP), encryption/decryption is applied to the video and voice data of the RTP payload. system. The control server monitors video and audio from multiple on-site camera terminal devices, monitors sensor data such as fine dust concentration and temperature, and monitors with one CCTV monitoring unit or multiple on-site camera terminal devices linked to multiple video storage servers. A TTS text transmission unit that transmits text from the control server according to regional characteristics and events;
A public service announcement/news provider unit that provides public service announcements and news to multiple on-site camera terminal devices; an IP multicasting unit that transmits videos, images, and text via IP multicast (IPv4 Class D) to multiple on-site camera terminal devices; and It includes a database (DB) that stores the device IDs and IP addresses of multiple field camera terminal devices, cameras, speakers, microphones, and information on sensor installation areas, and the control server stores and distributes images from each camera channel. A CCTV system capable of two-way video calls with an LCD display that is linked to the video storage server of . Video data from cameras installed on streetlight poles in various regions and equipped with speakers, microphones, sensors, and LCD displays, as well as fine dust concentration and temperature from one or more sensors, are transmitted to the control server and sent to the control PC as a client. displaying fine dust concentration and temperature on the LCD display of the field camera terminal device, displaying public service advertisements and news transmitted from the control server, and displaying the video/image/text of the control server on a plurality of field camera terminals. Transmitting IP multicasting to a device and displaying it on the LCD display of the plurality of field camera terminal devices, wherein the field camera terminal device is connected to an embedded processor and is connected to the control center of the control center through a UTP cable or optical cable. It has a communication unit connected to a server, wherein the sensor includes a fine dust measurement sensor and a temperature sensor, and the control server includes a public service announcement/news provision unit that provides public service announcements and news through one or more field camera terminal devices, ,The field camera terminal device includes a camera that captures images; A speaker that outputs an audio signal. A microphone that receives an audio signal. One or more sensors that measure fine dust concentration and temperature. Connected to the camera, the speaker, the microphone, and the one or more sensors, and periodically measuring one or more sensor data. an embedded processor that displays dust concentration and temperature on the LCD display and transmits sensor data measured at regular time intervals and video and audio data from cameras in real time to the control server; a storage unit connected to the embedded processor and storing a driving program; an LCD display connected to the embedded processor, displaying fine dust concentration and temperature, and displaying public service advertisements or news received from the control server; and a service provision method of a CCTV system capable of two-way video calls equipped with an LCD display including a communication unit connected to the embedded processor and connected to a control server of a control center through a UTP cable or an optical cable. A further step of transmitting text from the control server to the field camera terminal device, and the field camera terminal device converting the text received from the remote control server to TTS and outputting the text-converted voice to the speaker of the field camera terminal device. A service provision method of a CCTV system capable of two-way video calls equipped with an LCD display. Two-way video call data using RTP/UDP/IP or SRTP (Secure RTP) through the bell of the field camera terminal device, emergency bell equipped with camera, microphone, and speaker, control PC (camera, microphone, speaker), and control server. A method of providing a service for a CCTV system capable of two-way video calls with an LCD display, further comprising the step of applying encryption/decryption to video and voice data of the RTP payload when using SRTP (Secure RTP).