KR20200093891A - Cctv broadcast system for apartment complex and operating method thereof - Google Patents

Abstract

The present invention is to provide a next-generation apartment housing closed circuit television (CCTV) broadcasting system capable of transmitting a signal in a transmission mode optimized for the number of cameras operating video/audio quality and a channel environment, and an operation method thereof. According to the present invention, an operation method of an apartment housing CCTV broadcasting system may comprise the steps of: receiving a video/audio stream from at least one CCTV camera; determining a security priority of the received stream; multiplexing the stream according to the security priority; and outputting the multiplexed stream to a corresponding transport channel.

Description

CCTV broadcasting system of multi-family house and its operation method {CCTV BROADCAST SYSTEM FOR APARTMENT COMPLEX AND OPERATING METHOD THEREOF}

The present invention relates to a system and method for transmitting a CCTV video/audio signal in a next-generation multi-family apartment CCTV broadcasting system.

In general, a multi-family house can configure a local wired/wireless network so that residents of the complex can watch live images of installed cameras. This is called a closed circuit television (CCTV) network. CCTV housing is mandatory for apartment complexes that meet certain criteria. In addition, for viewing on TV, CCTV images can be multiplexed together with the terrestrial public office and cable broadcasting signals at the broadcasting signal management center of the apartment house and transmitted over a wired network. This is called the CCTV broadcasting system for apartment houses.

Conventional ATSC (Advanced Television Systems Committee) 1.0 standards-based multi-family CCTV networks have a limited selection of video/audio quality because they deliver video/audio based on a single transmission mode, and the resolution of the video is also recently demanded by users. There is a limit to reflect the matter. In particular, it is difficult to operate a plurality of CCTV cameras due to low frequency efficiency. However, when the next generation broadcasting system based on the ATSC 3.0 standard method is applied, it is possible to provide improved video/audio quality and more camera video services in the same bandwidth. In addition, unlike other conventional broadcast standard methods, since the ATSC 3.0 standard method configures a signal based on IP, a service using interworking with a broadband communication network can be newly formed. In a multi-unit CCTV broadcasting system, it can be used to improve the security of CCTV video/audio signals.

Korean Patent Publication: 10-2018-0070462, Publication date: June 26, 2018, Title: ATSC 3.0 digital TV broadcasting retransmission device and method Korean Patent Publication: 10-2017-0109296, Publication date: September 29, 2017, Title: App verification device and method in ATSC 3.0 based broadcasting system U.S. registered patent: US 10051227, Registration date: August 14, 2018, Title: Techniques for managing transition from ATSC 1.0 to ATSC 3.0

An object of the present invention is to provide a next-generation apartment housing CCTV broadcasting system capable of transmitting signals in a transmission mode optimized for the number of camera operations, video/audio quality, and channel environment, and a method for operating the same.

An operation method of a closed circuit television (CCTV) broadcasting system of an apartment house according to an embodiment of the present invention includes: receiving a stream for video/audio from at least one CCTV camera; Determining a security rank of the received stream; Multiplexing the streams according to the security rank; And outputting the multiplexed stream to a corresponding transport channel.

In an embodiment, the at least one CCTV camera is characterized by transmitting the stream in any one of a plurality of transmission modes.

In an embodiment, the plurality of transmission modes are determined according to a modulation order, a fast fourier transform (FFT) size, a guard interval, a code rate, a required CNR, or a transmission rate.

In an embodiment, the at least one CCTV camera includes a plurality of camera groups, and each of the plurality of camera groups is characterized by having a different security ranking.

According to an embodiment, the video configuration included in the stream is different according to the security ranking.

In an embodiment, the multiplexing of the streams may include multiplexing the streams using ATSC 3.0 MMT/ROUTE in the case of video/audio information of a first security rank.

In an embodiment, the transport channel is characterized by using ATSC 3.0 physical layer modulation.

In an embodiment, the transmission channel is characterized in that it is a cable broadcasting network for a multi-family house.

In an embodiment, the multiplexing of the streams may include multiplexing the streams using Broadband IP in the case of video/audio information of a second security rank.

In an embodiment, the transport channel is a broadband communication network.

In an embodiment, in the case of video/audio information of a third security rank, the method may include multiplexing the stream using a Broadband IP method.

In an embodiment, the transport channel is a broadband separation network.

In an embodiment, applying a scalable high efficiency video coding (SHVC) based on interworking with a broadcast network and a broadband communication network may further include providing a multi-unit CCTV broadcast service to authorized users among the multi-unit residents.

In an embodiment, separating the stream for each camera group into a SHVC base layer and a SHVC enhancement layer in the apartment CCTV broadcasting service; Encoding the separated stream; And transmitting the encoded stream to a corresponding transport channel.

In an embodiment, the transport channel corresponding to the SHVC base layer is a broadband communication network, and the transport channel corresponding to the SHVC enhancement layer is a multi-family wired broadcasting network.

In an embodiment, the broadband communication network allows access to a video/audio stream server using an authentication encryption key method, and the multi-housing cable broadcasting network is characterized by multiplexing the stream by ATSC 3.0 physical layer modulation.

A next-generation multi-family apartment CCTV (closed circuit television) broadcasting system according to an embodiment of the present invention encodes a video/audio stream received from a camera network according to a bit rate and format, and converts the encoded stream into a transport stream. /V real-time encoder; When the converted stream is the first security rank, the converted stream is multiplexed using the ATSC 3.0 MMT/ROUTE method and ATSC 3.0 studio-to-transmitter is added to the multiplexed stream by adding signaling information of ATSC 3.0 modulation parameters. link) a stream multiplexing and modulation parameter signal generator for generating a signal; And an ATSC 3.0 physical layer transmitter configured to configure the ATSC 3.0 STL signal as a modulated radio frequency (RF) signal of the ATSC 3.0 standard and transmit it to a wired/wireless broadcasting network.

In an embodiment, the ATSC 3.0 modulation unit for setting the ATSC 3.0 modulation parameter may be further included.

In an embodiment, the stream multiplexing and modulation parameter signal generation unit multiplexes the converted stream in an ATSC 3.0 MMT/ROUTE method when the converted stream is the first security rank, and the ATSC 3.0 STL signal in the multiplexed stream Characterized in that the output.

In an embodiment, the ATSC 3.0 physical layer transmitter extracts transmission parameters necessary for modulation from the ATSC 3.0 STL signal, and applies the extracted transmission parameters to transmit an ATSC 3.0 MMT/ROUTE based IP stream for ATSC 3.0 RF transmission. An ATSC 3.0 modulator modulating with an IF (intermediate frequency) signal; An RF up-converter converting the IF signal output from the ATSC 3.0 modulator into an RF signal; And an amplifying unit for amplifying the converted RF signal, wherein the amplified signal is transmitted through the wired/wireless broadcasting network.

According to an embodiment of the present invention, the CCTV broadcasting system of an apartment house and a method of operating the same can provide a more efficient attraction of the apartment in an apartment house through an increase in the number and resolution of transmittable video/audio programs.

In addition, the CCTV broadcasting system of an apartment house according to an embodiment of the present invention and its operation method are provided differentially through different channels according to security levels, thereby providing the multi-purpose function of a single apartment CCTV broadcasting system. It can be done.

The accompanying drawings are provided to help understanding of the present embodiment, and provide embodiments together with a detailed description. However, the technical features of the present embodiment are not limited to specific drawings, and the features disclosed in each drawing may be combined with each other to form a new embodiment.
1 is a view showing an example of a broadcasting service provided by the next generation multi-family CCTV broadcasting system 100 according to an embodiment of the present invention.
2 is a view showing an exemplary CCTV broadcasting system 100 of an apartment house according to an embodiment of the present invention.
3 is a diagram illustrating an ATSC 3.0 physical layer transmitter 160 according to an embodiment of the present invention.
4 is a flowchart exemplarily showing a method of operating the CCTV broadcasting system 100 of an apartment house according to an embodiment of the present invention.

In the following, the contents of the present invention will be described clearly and in detail so that those skilled in the art of the present invention can easily implement the drawings using the drawings.

The present invention can be applied to various changes and may have various forms, and specific embodiments will be illustrated in the drawings and described in detail in the text. However, it is not intended to limit the present invention to a specific disclosure form, and it should be understood that it includes all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. Terms such as first and second may be used to describe various components, but the components should not be limited by the terms.

The terms may be used for the purpose of distinguishing one component from other components. For example, the first component may be referred to as the second component without departing from the scope of the present invention, and similarly, the second component may also be referred to as the first component. When an element is said to be "connected" or "connected" to another component, it is understood that other components may be directly connected to or connected to the other component, but other components may exist in the middle. It should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that no other component exists in the middle.

Other expressions describing the relationship between the components, such as "between" and "just between" or "neighboring to" and "directly neighboring to" should be interpreted as well. Terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise.

In this application, the terms "include" or "have" are intended to indicate the existence of a feature, number, step, action, component, part or combination thereof carried out, one or more other features or numbers. It should be understood that it does not preclude the existence or addition possibilities of, steps, actions, components, parts or combinations thereof. Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person skilled in the art to which the present invention pertains. Terms, such as those defined in a commonly used dictionary, should be interpreted as meanings consistent with meanings in the context of related technologies, and should not be interpreted as ideal or excessively formal meanings unless explicitly defined in the present application. .

The next-generation apartment housing CCTV broadcasting system and its operation method according to an embodiment of the present invention can transmit a signal in a transmission mode optimized for the number of camera operations, video/audio quality, and channel environment.

1 is a view showing an example of a broadcasting service provided by the next generation multi-family CCTV broadcasting system 100 according to an embodiment of the present invention. Referring to FIG. 1, the apartment CCTV broadcasting system 100 collects video/audio signals recorded/recorded from each CCTV camera installed in the apartment complex, and the ATSC capable of receiving the collected video/audio signals from a commercial TV receiver 3.0 Terrestrial broadcast standard protocol and broadband (broadband) communication converted to IP (internet protocol) protocol, and then the converted video / audio signal can be transmitted through a wired / wireless network.

In an embodiment, the CCTV cameras may be divided into a plurality of groups based on the security ranking of the CCTV camera video/audio signals determined according to conditions such as an installation location. For example, as shown in FIG. 1, the first group may be a CCTV camera for residents, and the second group may be a CCTV camera for general access.

In an embodiment, the video/audio signals of each CCTV camera group may be transmitted through different transmission channels by applying different stream multiplexing schemes. For example, the video/audio signals of each CCTV camera group are stream multiplexed to ATSC 3.0 ROUTE (Realtime　Object　delivery　over　Unidirectional　Transport)/MMT (MPEG　Media　Transport), and after being subjected to ATSC 3.0 physical layer modulation, the wired/wireless broadcast network is used. Can be sent.

For another example, video/audio signals of each CCTV camera group may be stream multiplexed with a broadband communication IP protocol (eg, DASH) and transmitted to a broadband communication network. At this time, the broadband communication network through which the broadband IP stream can be transmitted may include a general communication network, a dedicated network licensed from a communication network operator, or a separation network connecting a broadband IP stream output port and a receiver by wired direct connection.

In general, the conventional multi-family CCTV broadcasting system applies a transmission mode designed in consideration of the terrestrial channel environment even in a wired channel environment in the multi-unit complex. Table 1 shows a transmission mode for a conventional ATSC 1.0 based monitoring network.

Modulation method 8-VSB Oryu Jeong-ho | Code rate Convolutional Code + RS Code | 2/3 Request CNR 15.2 dB Transfer rate 19.39 Mbps

On the other hand, the CCTV broadcasting system 100 of a multi-family house according to an embodiment of the present invention may increase a transmission rate by differently applying a transmission mode according to a channel environment in a multi-family house. Table 2 shows an example of a transmission mode of the CCTV broadcasting system 100 of an apartment house according to an embodiment of the present invention.

Example #1 Example #2 Example #3 Modulation order 256QAM 1024 NUC 4096 NUC FFT size 32K 32K 32K Protection section GI1_192 (27.78us) GI1_192 (27.78us) GU1_192 (27.79us) Code rate 9/15 12/15 13/15 Request CNR 15.7 dB 26 dB 33 dB Transfer rate 26.87 Mbps 44.93 Mbps 58.88 Mbps

An example in consideration of the channel environment of a general MDU cable network is shown in Example #2 of Table 2. Apartment CCTV broadcasting system 100 according to an embodiment of the present invention can increase the transmission rate of a general cable broadcasting network that satisfies a carrier to noise ratio (CNR) criterion of 27 dB by about 2.3 times compared to a conventional system.

Apartment CCTV broadcasting system 100 according to an embodiment of the present invention may have a transmission rate gain of 30% or more under a required CNR performance similar to a conventional ATSC 1.0 standard-based system (see Table 2, Example #1). If an improved channel environment can be secured, the multi-unit CCTV broadcasting system 100 according to an embodiment of the present invention can increase the transmission rate up to three times (see Table 2, Example #3).

Accordingly, the CCTV broadcasting system 100 of an apartment house according to an embodiment of the present invention can increase the number of CCTV video/audio and improve image quality by using an additional data transmission rate secured by optimization of a transmission mode.

The ATSC 3.0 standard method has an advantage over the ATSC 1.0 method in terms of extrusion efficiency of video encoding codecs supported in addition to the transmission rate. For this reason, the CCTV broadcasting system 100 of an apartment house according to an embodiment of the present invention can increase the number of operational CCTV cameras from a simple transmission rate ratio with a conventional system.

For example, when calculating based on an image having a 1080p resolution and a frame rate of 30 fps (frame per second), the number of images that a conventional system can transmit is about four. On the other hand, the multi-unit CCTV broadcasting system 100 according to an embodiment of the present invention can transmit about 37 in the conditions of Table 2 and Example #2.

Table 3 shows video encoding examples of the ATSC 1.0 and ATSC 3.0 standard methods.

Conventional system The present invention Codec MPEG-2 HEVC resolution 720p 1080p 1080p 1080p 1080p 2160p Frame rate 30 fps 30 fps 60 fps 30 fps 60 fps 60 fps Bit rate 3.8 Mbps 4.8 Mbps 8 Mbps 1.2 Mbps 2.6 Mbps 16 Mbps Number of transmittable videos 5 4 2 37 17 2

In Table 3, the conventional system is an ATSC 1.0-based system, and the present invention is a CCTV broadcasting system for a multi-family house corresponding to Table 2, Example #2 standards. Referring to Table 3, the conventional multi-family CCTV broadcasting system can transmit 5 720p, 30 fps images, whereas the multi-family CCTV broadcasting system 100 according to an embodiment of the present invention displays 1080p, 60 fps images 17 Dogs can transmit. That is, the CCTV broadcasting system 100 of a multi-family house according to an embodiment of the present invention can transmit more than three times higher quality video than the conventional one. In addition, the multi-unit CCTV broadcasting system 100 according to an embodiment of the present invention can operate a CCTV network with 4k-UHD (ultra high definition) video having 2160p resolution and 60 fps frame rate. Apartment CCTV broadcasting system 100 according to an embodiment of the present invention may provide a service for differently configuring the video included in the stream according to the security priority for each camera video and transmitting each to a channel with different accessibility.

For example, high-security camera video/audio signals (video/audio signals of the first security rank) are multiplexed with the ATSC 3.0 IP protocol to broadcast radio frequency (RF) over a wired channel so that only residents of the apartment can access it. It can be transmitted into the home as a signal.

For another example, the video/audio signal (video/audio signal of the first security rank) accessible from outside the home for the purpose of universal public safety may be multiplexed with a broadband communication standard IP protocol and transmitted through a broadband communication network.

As another example, the video/audio signals (video/audio signals of the third security rank) that need to be given only to the apartment house management center are separately multiplexed with the broadband communication IP protocol and transmitted to a communication network directly connected to the corresponding management office. Can be.

Meanwhile, the CCTV broadcasting system 100 of an apartment house according to an embodiment of the present invention may have a different stream multiplexing method and transmission channel according to expected user access rights (security level). Table 4 shows an example of stream multiplexing and transmission channel allocation by CCTV camera video/audio security ranking of the present invention.

Expected user access rights (security ranking) Apartment Residents
(First security rank) General approach
(Second Security Rank) Apartment Housing Management Office
(Third security rank) Stream multiplexing method ATSC 3.0 MMT/ROUTE Broadband IP (ex. DASH) Broadband IP (ex. DASH) Transmission channel Apartment Housing Cable Broadcasting Network (ATSC 3.0 Physical Layer Modulation) General broadband communication network Broadband separation network (ex. Directly connected to apartment housing management center)

In addition, the multi-unit CCTV broadcasting system 100 according to an embodiment of the present invention applies a scalable HEVC (SHVC; scalable High Efficiency Video Coding) based on interworking with a broadcasting network and a broadband communication network to provide a multi-unit apartment among the residents of the multi-unit housing only. CCTV broadcasting service can be configured.

Apartment CCTV broadcasting service according to an embodiment of the present invention can separately encode and encode video/audio signals of a CCTV camera group into two streams of a SHVC base layer and an enhancement layer, and then transmit them to different transmission channels. Here, a commercial receiver that supports SHVC decoding can restore the original video/audio signal by receiving and recombining two corresponding streams through respective transmission channels. At this time, the stream transmitted through the broadband communication network may block unauthorized users by requesting an authentication encryption key to access the video/audio stream server.

Using the above-described method, the SHVC base layer is encoded at a very low resolution, transmitted to a broadband communication network, and access to the video/audio stream server of a user who has not entered a previously issued authentication encryption key is blocked, and the SHVC enhancement layer is ATSC 3.0. When multiplexing based on MMT/ROUTE and transmitting to a wired broadcasting network, it is possible to transmit a video/audio service of an appropriate quality only to an authorized user.

In an embodiment, an example of a scenario in which SHVC to which a broadcast network and a broadband communication network interworking based is applied is shown in the following table. Table 5 shows an embodiment of applying SHVC based on interworking with a broadcasting network and a broadband communication network in the present invention.

Example #1 Example #2 SHVC Layer Base Layer Enhancement Layer Base Layer Enhancement Layer Stream multiplexing method ATSC 3.0 MMT/ROUTE Broadband IP (ex. DASH) Broadband IP
(ex. DASH) ATSC 3.0 MMT/ROUTE Transmission channel Apartment Housing Cable Broadcasting Network (ATSC 3.0 Physical Layer Modulation) General broadband communication network
(Authentication password key method security) General broadband communication network
(Authentication password key method security) Apartment Housing Cable Broadcasting Network
(ATSC 3.0 physical layer modulation)

2 is a view showing an exemplary CCTV broadcasting system 100 of an apartment house according to an embodiment of the present invention. Referring to FIG. 2, the CCTV broadcasting system 100 of a multi-family house includes a CCTV camera network 110, a camera network control unit 120, an A/V (audio/video) real-time encoder 130, a stream multiplexing and modulation parameter signal It may include a generator 140, an ATSC 3.0 controller 150, and an ATSC 3.0 physical layer transmitter 160.

CCTV camera network 110 may be implemented to encode each of the captured video / audio signal in a pre-installed location in its own format. CCTV camera network 110 may include a plurality of monitoring cameras (#1 ~ #N, N is an integer of 2 or more).

The camera network controller 120 may be implemented to control the resolution and frame rate of each camera of the CCTV camera network 110. In addition, the camera network control unit 120 may input video/audio signals for each camera received from the CCTV camera network 110 to the A/V real-time encoder 130.

The A/V real-time encoder 130 encodes a video/audio signal according to a set bit rate and format, converts the encoded signal into a TS (transport stream) format, and stream multiplexing and modulation parameter signal generator 140 Can be implemented to output to At this time, the CCTV camera may include a CCTV camera network 110, a camera network control unit 120, A/V real-time encoder 130.

The stream multiplexing and modulation parameter signal generator 140 converts the received video/audio encoding signal into an ATSC 3.0 MMT/ROUTE-based IP (Internet Protocol) stream, and adds ATSC 3.0 modulation parameter signaling information to the converted signal. , It may be implemented to configure an ATSC 3.0 STL (Studio-to-Transmitter Link) signal that satisfies the A/321 standard and output the configured signal to the ATSC 3.0 modulator 150.

The ATSC 3.0 control unit 150 may be implemented to set ATSC 3.0 modulation parameters according to user needs. At the same time, the stream multiplexing and modulation parameter signal generator 140 converts the video/audio encoding signal received from the A/V real-time encoder 130 into a broadband communication standard IP stream such as DASH and outputs it to a broadband communication network.

The ATSC 3.0 physical layer transmitter 160 constructs a modulated RF signal of the ATSC 3.0 standard method based on the output STL signal of the stream multiplexing and modulation parameter signal generator 140 and implements the configured signal to be transmitted through a wired broadcasting network. Can be.

Meanwhile, the CCTV broadcasting system of an apartment house according to an embodiment of the present invention is not illustrated, but may further include a retransmission device. The retransmission apparatus is a receiver that selectively receives at least one of an ATSC (Advanced Television System Committee) 3.0-based digital broadcast signal and an IP (Internet Protocol) packet input through the first network, and a second based on the output signal of the receiver. Converts audio/video (A/V) packets and signaling information to enable reception on the network to generate MPEG-2 Moving Picture Experts Group-2 Transport Stream (TS) packets, and System Information (SI) of the digital broadcast headend A controller for extracting and providing broadcast program-related information so that the system generates an SI table related to a broadcast program converted to MPEG-2 TS, and a broadcast network and the broadcast program-related information converted from MPEG-2 TS packets. It may include a transmitter for transmitting through.

Apartment CCTV broadcasting system 100 according to an embodiment of the present invention can transmit a signal in a transmission mode optimized for the number of camera operations, video/audio quality and channel environment. In particular, the CCTV broadcasting system 100 of an apartment house according to an embodiment of the present invention can provide various services by differentially providing CCTV video/audio through different channels according to security levels.

3 is a diagram illustrating an ATSC 3.0 physical layer transmitter 160 according to an embodiment of the present invention. Referring to FIG. 3, the ATSC 3.0 physical layer transmitter 160 may include an ATSC 3.0 modulator 161, an RF upconversion unit 162, and an amplification unit 163.

The ATSC 3.0 modulator 161 extracts transmission parameters required for modulation from the received ATSC 3.0 STL signal and applies the extracted parameters to an ATSC 3.0 MMT/ROUTE based IP stream for IF (intermediate frequency) for ATSC 3.0 RF transmission It can be implemented to modulate with a signal.

The RF upconversion unit 162 may be implemented to receive the IF signal output from the ATSC 3.0 modulator 161 and convert the received IF signal into an RF signal.

The amplification unit 163 may be implemented to receive and amplify the RF signal from the RF upconversion unit 162 and transmit the amplified signal to the wired/wireless broadcasting network.

At this time, as described above, in order to provide a service for differently allocating a stream multiplexing method and a transmission channel based on the CCTV camera security ranking, the stream multiplexing and modulation parameter signal generator 140 multiplexes the input video/audio TS streams. Can be divided into groups. And each of the divided groups can be output to different ports by applying different stream multiplexing. To this end, the ATSC 3.0 control unit 150 monitors the video/audio related information input to the stream multiplexing modulation parameter signal generator control unit 140, and sets a control signal for grouping input video/audio streams and setting a stream multiplexing method. It can be transmitted to the stream multiplexing modulation parameter signal generator control unit 140.

In addition, the A/V real-time encoder 130 may support SHVC encoding in order to provide a secure CCTV broadcast service using scalable HEVC (SHVC) based on interworking with a broadcasting network and a broadband communication network as shown in Table 5.

4 is a flowchart exemplarily showing a method of operating the CCTV broadcasting system 100 of an apartment house according to an embodiment of the present invention. 1 to 4, the apartment CCTV broadcasting system 100 may operate as follows.

The multi-family CCTV broadcasting system 100 may determine the CCTV camera security ranking from the video/audio stream received from at least one CCTV camera (S120). Apartment CCTV broadcasting system 100 may multiplex the video / audio stream according to the security ranking (S120). For example, in the case of the first security rank, the video/audio stream may be multiplexed by the first stream multiplexing method, and in the case of the second security rank, the video/audio stream may be multiplexed by the second stream multiplexing scheme. Here, the first and second security rankings are different, and the first stream multiplexing method and the second stream multiplexing method are also different. Here, the first stream multiplexing scheme is ATSC 3.0 MMT/ROUTE, and the second stream multiplexing scheme may be Broadband IP.

Thereafter, the multi-family CCTV broadcasting system 100 may output the multiplexed stream as a transmission channel corresponding to the security ranking (S130). For example, in the case of the first security rank, the transmission channel of the MDU may be a wired broadcasting network (ATSC 3.0 physical layer modulation), and in the case of the second security rank, it may be a general broadband communication network.

Depending on the embodiment, some or all of the steps and/or actions run instructions, programs, interactive data structures, clients and/or servers stored in one or more non-transitory computer-readable media. At least some may be implemented or performed using one or more processors. The one or more non-transitory computer-readable media may be illustratively software, firmware, hardware, and/or any combination thereof. In addition, the functionality of the “module” discussed herein may be implemented in software, firmware, hardware, and/or any combination thereof.

One or more non-transitory computer-readable media and/or means for implementing/performing one or more operations/steps/modules of embodiments of the present invention include application-specific integrated circuits (ASICs), standard integrated circuits, Controllers that perform appropriate instructions, including microcontrollers, and/or embedded controllers, field-programmable gate arrays (FPGAs), complex programmable logic devices (CPLDs), and the like. Does not.

As described above, the present invention provides a more efficient security attraction in a multi-unit housing complex by increasing the number and resolution of video/audio programs that the multi-unit CCTV broadcasting system can transmit, and CCTV video/audio are different depending on the security level. A single apartment CCTV broadcasting system can function multi-purpose by allowing it to be provided differentially through channels.

Meanwhile, the above-described contents of the present invention are only specific embodiments for carrying out the invention. The present invention will include technical ideas that are abstract and conceptual ideas that can be utilized as future technologies, as well as the concrete and practical means available.

100: CCTV broadcasting system for apartment houses
110: CCTV Camera Network
120: camera network control
130: A/V real-time encoder
140: stream multiplexing and modulation parameter signal generation unit
150: ATSC 3.0 control unit
160: ATSC 3.0 physical layer transmitter
161: ATSC 3.0 modulator
162: RF upconversion unit
163: amplification section

Claims (20)

In the operation method of the CCTV (closed circuit television) broadcasting system of the apartment,
Receiving a video/audio stream from at least one CCTV camera;
Determining a security rank of the received stream;
Multiplexing the streams according to the security rank; And
And outputting the multiplexed stream to a corresponding transport channel. According to claim 1,
And the at least one CCTV camera transmits the stream in any one of a plurality of transmission modes. According to claim 2,
The plurality of transmission modes, a modulation order, a fast fourier transform (FFT) size, a guard interval, a code rate, a CNR (carrier to noise ratio), or a method characterized in that it is determined according to the transmission rate. According to claim 1,
The at least one CCTV camera includes a plurality of camera groups,
Each of the plurality of camera groups, characterized in that having a different security ranking. The method of claim 4,
Method according to the security ranking, characterized in that the video configuration included in the stream is different. According to claim 1,
The step of multiplexing the stream,
And multiplexing the stream using the ATSC 3.0 MMT/ROUTE method in the case of video/audio information of the first security rank. The method of claim 6,
The transmission channel is characterized in that it uses ATSC 3.0 physical layer modulation. The method of claim 7,
The transmission channel is characterized in that the cable broadcasting network in the apartment. According to claim 1,
The step of multiplexing the stream,
And in the case of video/audio information of the second security rank, multiplexing the stream using a Broadband IP method. The method of claim 9,
The transmission channel is characterized in that the broadband communication network. According to claim 1,
And multiplexing the stream using the Broadband IP method in the case of the video/audio information of the third security rank. The method of claim 11,
The transmission channel is characterized in that the broadband separation network. According to claim 1,
A method further comprising providing a multi-unit CCTV broadcasting service to an authorized user among residents of the multi-family housing by applying scalable high efficiency video coding (SHVC) based on interworking of a broadcasting network and a broadband communication network. The method of claim 13,
Separating the streams for each camera group into a SHVC base layer and a SHVC enhancement layer in the apartment CCTV broadcasting service;
Encoding the separated stream; And
And transmitting the encoded stream to a corresponding transport channel. The method of claim 14,
The transport channel corresponding to the SHVC base layer is a broadband communication network,
The transmission channel corresponding to the SHVC enhancement layer is characterized in that the cable broadcasting network in the apartment. The method of claim 15,
The broadband communication network allows access to the video/audio stream server using an authentication encryption key method,
The multi-housing cable broadcasting network is characterized in that the stream is multiplexed by ATSC 3.0 physical layer modulation. In a closed-circuit television (CCTV) broadcasting system:
An A/V real-time encoder that encodes the video/audio stream received from the camera network according to a bit rate and format, and converts the encoded stream into a transport stream;
When the converted stream is the first security rank, the converted stream is multiplexed with an ATSC 3.0 MMT/ROUTE method and ATSC 3.0 studio-to-transmitter by adding signaling information of ATSC 3.0 modulation parameters to the multiplexed stream link) a stream multiplexing and modulation parameter signal generator for generating a signal; And
The ATSC 3.0 STL signal consists of a modulated radio frequency (RF) signal of the ATSC 3.0 standard method and includes an ATSC 3.0 physical layer transmitter for transmitting to a wired/wireless broadcasting network. The method of claim 17,
CCTV broadcasting system of a multi-family house further comprising an ATSC 3.0 modulation unit for setting the ATSC 3.0 modulation parameters. The method of claim 17,
The stream multiplexing and modulation parameter signal generation unit,
When the converted stream is the first security rank, the converted stream is multiplexed with an ATSC 3.0 MMT/ROUTE method, and the multiplexed stream is output as an ATSC 3.0 STL signal. The method of claim 17,
ATSC 3.0 physical layer transmitter,
An ATSC 3.0 modulator that extracts transmission parameters necessary for modulation from the ATSC 3.0 STL signal and modulates an ATSC 3.0 MMT/ROUTE based IP stream into an IF signal for ATSC 3.0 RF transmission by applying the extracted transmission parameters;
An RF up-converter converting the IF signal output from the ATSC 3.0 modulator into an RF signal; And
And an amplifying unit for amplifying the converted RF signal,
The amplified signal is transmitted through the wired/wireless broadcasting network CCTV housing system of a multi-family house.

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