KR101601208B1 - Apparatus and method for changing channels by contorlling frame rates - Google Patents

Abstract

The present invention relates to a channel variable apparatus and method according to the number of frames, and more particularly, to a method and apparatus for adjusting a number of frames that can easily change the number of channels by adjusting the number of frames per channel corresponding to a plurality of different video signals To a channel variable device and method. The present invention can automatically detect an SD signal and an HD-SDI signal received through a single connector and output an image corresponding to a signal type so that the channel can be changed without any setting, and at the same time, -The number of channels according to the number of SDI signals and IP signals can be easily allocated according to the number of frames within the limit processing frame number, and the number of channels for IP-based cameras can be easily increased It can be easily applied to a mixed system of various kinds of cameras by adjusting the number of frames and it is possible to increase the number of channels without installing a separate DVR for additional channels according to the control of the number of frames, It is possible to reduce the cost of the system.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a channel variable apparatus and method for controlling a number of frames,

The present invention relates to a channel variable apparatus and method according to the number of frames, and more particularly, to a method and apparatus for adjusting a number of frames that can easily change the number of channels by adjusting the number of frames per channel corresponding to a plurality of different video signals To a channel variable device and method.

Recently, the introduction of surveillance systems using DVRs connected to various cameras has been actively promoted. In addition to the development of image technology, there is a need to establish an improved surveillance system environment by converting the existing SD class cameras to HD class cameras Is increasing.

In addition, with the recent development of network related technology, current HD system has been activated the NVR based surveillance system considering the convenience and expandability of the connection line for image transmission. However, in the existing SD class CCTV system, If you want to switch to a rapid surveillance system, you have to discard the existing SD-class CCTV infrastructure and change it to a facility for building an infrastructure environment based on NVR.

Therefore, HD-SDI technology that enables high-quality HD video surveillance utilizing the existing CCTV infrastructure is attracting attention. The HD-SDI (High Definition-Serial Digital Interface) is one of the digital image transmission standards defined by the SMPTE Association. It is mainly used in HD cameras and broadcasting equipment for HD digital broadcasting.

Such HD-SDI HD CCTV can reuse CCTV infrastructure, and HD CCTV and HD DVR provide a user interface (UI) such as an existing CCTV and DVR-like architecture. In addition, HD CCTV cameras have many advantages such as capable of transmitting digital video and transmitting 720p and 1080p video formats corresponding to about 6 times the resolution of NTSC / PAL.

However, the current HD-SDI HD CCTV has a disadvantage that the transmission distance is limited and the cost of components is high. For example, in order to reuse the advantage of CCTV, which is an advantage of HD CCTV, the transmission distance of the image should be more than 300m, which is the same as CCTV, and it is not yet half of the HD-SDI technology. In addition, the HD-SDI transmission / reception chipset, which is the core component of HD-SDI technology, is relatively inferior in competitiveness because it is expensive compared to IP-type high-resolution cameras.

In this way, when HD-SDI technology is applied to the line for existing SD-class video transmission, the distance of image transmission is reduced so that it is often difficult to recycle the existing line. Also, Frequent occurrence.

Therefore, in recent years, it is not easy to recycle such existing lines. Therefore, it is necessary to use HD-level video surveillance only in areas where high-resolution surveillance is required, and to use existing SD- , A DVR that supports HD-SDI for a predetermined channel and SD for a predetermined channel has appeared.

However, such a DVR configuration is difficult to install due to the physical separation of the SD channel and the HD-SDI channel, and since the same BNC interface is used, installation errors frequently occur when a general user installs or changes the channel.

In addition, there is an increasing demand for PTZ cameras in areas requiring precise surveillance. However, since the IP-based interface is required instead of the BNC interface, it is difficult to support the PTZ camera in the above-mentioned CCTV system. There is a problem in that the system configuration cost increases because it needs to be newly provided.

Even if the BNC interface and the IP-based interface are configured by different DVRs, the number of channels supported by the DVR is limited. Therefore, even if only one channel number exceeds the number of channels supported by the DVR, There is a problem that an additional purchase of the IP-based DVR 10 is required. Therefore, there is a problem that system configuration efficiency is extremely reduced and cost is rapidly increased.

Furthermore, since the number of channels is increased by a factor of several according to the specifications such as 16 channels and 32 channels in general, there is an inconvenience that the number of cameras to be configured must be specified in advance, and if the number of cameras to be arranged is not accurately specified, The present DVR has a problem that extensibility is extremely low.

Accordingly, it is required to develop a device capable of supporting a system in which various types of cameras such as SD-class, HD-class CCTV and remote and PTZ cameras are mixed and the number of channels can be easily changed according to characteristics of the application site.

Korean Patent No. 10-0885471

The present invention can easily change the channel setting by detecting the SD signal and the HD-SDI signal, and at the same time, supports the IP-based camera to facilitate the number of channels according to the number of SD signals and HD- The present invention provides a device that supports various types of cameras and supports the number of channels to be easily expanded regardless of the number of connectors and ports for receiving signals.

In addition, the present invention adjusts the number of frames of the SD and HD-SDI video according to the importance of the surveillance region, and supports the number of channels to be easily varied by allocating the bandwidth corresponding to the number of frames to the IP signal, And it is an object of the present invention to guarantee the ease and convenience of expansion and to improve the efficiency of channel organization.

The channel variable apparatus according to an embodiment of the present invention includes an SD signal processor for processing an SD signal, an HD-SDI signal processor for processing an HD-SDI signal and detecting an SD signal and an HD-SDI signal, SDI signal when the SD or HD-SDI signal is received, and transmits the HD-SDI signal to the HD-SDI signal processor when the SD signal is an SD signal, An IP signal processing unit for receiving and processing one or more IP-based video signals corresponding to different channels, and a control unit for controlling the number of frames per channel according to the SD signal, the HD-SDI signal and the IP signal, And a codec unit for changing the codec unit.

In one embodiment of the present invention, the HD-SDI signal processing unit detects the SD signal and the HD-SDI signal in the channel variable apparatus according to the number of frames, and when the SD signal is an SD signal, And a signal detector for switching to be switched to a signal processing unit.

The channel variable apparatus according to the present invention may further include a connector unit connected to the path switch unit to receive the SD and HD-SDI signals and based on a BNC interface. can do.

As an example related to the present invention, the channel variable apparatus according to the number of frames may be configured such that the number of frames per channel corresponding to one or more of the SD signal, HD-SDI signal, And a control unit for providing information to the codec unit and varying the number of frames per channel of the codec unit based on the setting information.

As an example related to the present invention, the codec unit may determine whether the SD signal, the HD-SDI signal, and the IP signal are included in the limited processing frame number for the additional channel corresponding to at least one of the SD signal, the HD- And an HD-SDI signal, and increases the number of available frames by allocating the number of remaining frames to the number of frames of the additional channel.

In one embodiment of the present invention, the IP signal processing unit is connected to a hub and separates different IP signals received from the hub.

In an exemplary embodiment of the present invention, the codec unit allocates a channel corresponding to each IP signal separated through the IP signal processing unit, and changes a frame number of a channel corresponding to at least one of the SD signal and the HD- And allocating the number of remaining frames to the frame number of the channel corresponding to each IP signal to increase the number of channels.

The channel variable method according to the embodiment of the present invention is an HD-SDI signal processing unit for processing an HD-SDI signal assuming that the path switching unit receives the SD or HD-SDI signal as an HD-SDI signal SDI processing unit to switch to the SD signal processing unit when it is an SD signal, receiving and processing one or more IP-based video signals corresponding to different channels of the IP signal processing unit, A codec unit allocates a channel for each signal processed through at least one of the HD-SDI signal processing unit and the SD signal processing unit and the IP signal processing unit, and allocates a channel for each channel according to the SD signal, HD-SDI signal, To the limit processing frame number of the codec unit.

The present invention can automatically detect an SD signal and an HD-SDI signal received through a single connector and output an image corresponding to a signal type so that the channel can be changed without any setting, and at the same time, -The number of channels according to the number of SDI signals and IP signals can be easily allocated according to the number of frames within the limit processing frame number, and the number of channels for IP-based cameras can be easily increased It can be easily applied to a mixed system of various kinds of cameras by adjusting the number of frames and it is possible to increase the number of channels without installing a separate DVR for additional channels according to the control of the number of frames, It is possible to reduce the cost of the system.

Further, according to the present invention, the number of frames allocated to each connector is adjusted and the number of remaining frames remaining is allocated to the channel for the IP-based camera at the limit processing frame number, Area is monitored through a high frame count using a PTZ camera, and monitoring is performed with a low frame count using an HD-SDI or SD camera for a surveillance area in which the importance is low, It is effective to support the system configuration at a cost.

1 is an illustration of a DVR configuration according to the prior art;
2 is a detailed block diagram of a channel variable device according to an embodiment of the present invention;
3 is a diagram illustrating an example of a channel variable operation according to the number of frames of a channel variable apparatus according to an embodiment of the present invention;
4 is a diagram illustrating an example of frame number allocation according to a camera type in a channel variable device according to an embodiment of the present invention;
5 is a diagram illustrating channel expansion for an IP signal using a hub configuration of a channel variable device according to an embodiment of the present invention;
FIG. 6 is a flowchart illustrating a channel variable method according to an embodiment of the present invention; FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 2 is a block diagram of a channel variable device 100 according to an embodiment of the present invention. As shown in FIG. 2, the channel variable device 100 includes at least one connector 110, SDI signal processing unit 130 and SD signal processing unit 140 connected to each path switching unit 120. The HD-SDI signal processing unit 130 and the SD signal processing unit 140 And a codec unit 150 connected to the codec unit 150.

The connector 110 may support a BNC (Bayonet Neil-Concelman) interface for a coaxial cable and may be connected to a HD (High Definition) camera or an SD SD (High Definition-Serial Digital Interface) signal or SD (Standard Definition) signal.

The path switching unit 120 may regard the HD-SDI signal or the SD signal received through the connector as an HD-SDI signal and transmit the signal to the HD-SDI signal processing unit 130.

Accordingly, the HD-SDI signal processing unit 130 may process the HD-SDI signal among the video signals received from the path switching unit 120 and provide the HD-SDI signal to the codec unit 150.

The HD-SDI signal processing unit 130 further includes a signal detecting unit 131. The signal detecting unit 131 receives the HD-SDI signal or the SD signal from the path switching unit 120, It is possible to determine whether the received video signal is an HD-SDI signal or an SD signal.

The signal detector 131 may process the signal through the HD-SDI signal processor 130 if the signal is the HD-SDI signal according to the discrimination result. If the signal is the SD signal, the signal detector 131 may switch the path switcher 120 And switch the path so that the SD signal is transmitted to the SD signal processing unit 140. FIG.

Accordingly, the SD signal processing unit 140 can receive the SD signal from the path switching unit 120 according to switching of the path switching unit 120, process the image signal, and transmit the SD signal to the codec unit 150.

The signal detector 131 is configured outside the HD-SDI signal processor 130 and receives the HD-SDI signal and the SD signal received from the path switching unit 120 to convert the HD- To the SDI signal processing unit 130 or to switch the path switching unit 120 so that an SD signal is transmitted to the SD signal processing unit 140. [

In the above-described configuration, a video signal of the SD class is analog and a frequency of 400 MHz or less, whereas a video signal of the HD-SDI class has a digital signal format and can have a frequency of 1.4 Ghz or more.

Accordingly, as a preferred embodiment of the signal detection determination of the signal detector 131, when the signal detector 131 detects a signal of 1 GHz or higher, it is determined to be HD-SDI or conversely if a signal of 500 MHz or less is detected, Signal. Also, the signal detector 131 may determine the signal using a different signal format.

The channel variable apparatus 100 according to the number of frames may further include an IP (Internet Protocol) interface unit 170 and an IP signal processing unit 180 connected to the IP interface unit 170 And can be connected to an IP-based camera such as a PTZ camera, an IP camera, or the like through the IP interface unit 170.

Accordingly, the IP interface unit 170 receives an IP signal, which is a video signal received from the IP-based camera, and transmits the IP signal to the IP signal processing unit 180. The IP signal processing unit 180 processes the IP signal And transmit video information corresponding to the IP signal to the codec unit 150.

The codec unit 150 may receive image information received from any one of the HD-SDI signal processing unit 130 and the SD signal processing unit 140 corresponding to each connector unit 110 connected to the camera, 180 may be coded according to a predetermined codec and output through a channel assigned to each image information through an output unit.

In this case, the output unit may include a display, a network video recorder (NVR), a digital video recorder (DVR), and the like.

Meanwhile, the codec unit 150 may set the number of frames to be processed in advance, and may change the number of frames per channel for the video information corresponding to the SD signal, the HD-SDI signal, and the IP signal. Here, the number of frames described in the present invention may mean a frame rate.

Accordingly, the codec unit 150 can vary the number of channels according to the number of frames per variable channel.

3, channel 1 and channel 2 are allocated according to image information corresponding to different SD signals, and channel 1 and channel 2 are allocated according to image information corresponding to different HD-SDI signals. And the number of frames allocated to each channel is 30, the number of frames to be processed by the codec unit 150 is 30 x 4 channels.

However, if the limit processing frame number of the codec unit 150 is 120, as shown in FIG. 3 (a), it is impossible to process image information on the IP signal received from the IP signal processing unit 180, A separate DVR for the channel needs to be added, resulting in a significant increase in the system configuration cost.

However, according to the embodiment of the present invention, the codec unit 150 may change the number of frames for channel 1 and channel 4 to 25 as shown, change the number of free frames generated according to the variable number of frames for each channel, It can be assigned to a channel corresponding to the IP signal.

3 (b), the CODEC unit 150 allocates 20 according to the number of free frames to the output of the video information corresponding to the IP signal, allocates the channel 5 corresponding to the IP signal Channel 1 to channel 5 can be output simultaneously.

At this time, the codec unit 150 may code image information corresponding to each channel according to the number of frames per channel corresponding to each channel.

In addition, the channel variable apparatus 100 according to the embodiment of the present invention may further include a storage unit, and the codec unit 150 may store the coded image information in the storage unit.

On the basis of the above-described configuration, the codec unit 150 allocates 20 channels to each of the two different channels by decreasing the number of frames of the channels 1 to 4 to 20 or less and 40 remaining frames, You may.

Although the IP signal is exemplarily described in the above-described embodiment, the codec unit 150 may receive at least one of the SD signal, the HD-SDI signal, and the IP signal added in excess of the limit processing frame number, The number of frames for at least one of the one or more SD signals and the HD-SDI signals for the additional channel may be varied and the number of remaining frames may be allocated to each of the additional channels to easily change the number of channels.

In this manner, the codec unit 150 can easily increase the number of channels by changing the number of frames of another channel for the additional channel exceeding the limit processing frame number and allocating the remaining number of remaining frames to the additional channel.

That is, the codec unit 150 can easily increase the number of channels without adding a separate DVR through the variable number of frames per channel, or increase the number of channels by a user.

2, the channel variable apparatus 100 according to the number of frames may further include a controller 160 for controlling the codec unit 150. The controller 160 may control the number of frames And may transmit setting information for controlling the number of frames to the codec unit 160. [

Accordingly, the codec unit 150 allocates channels corresponding to one or more different SD signals, HD-SDI signals, and IP signals based on the setting information, and allocates a frame number according to the setting information for each channel .

Based on the above-described configuration, the controller 160 may set the number of frames to be different for each channel allocated to each camera such as an SD camera, an HD-SDI camera, an IP camera, and a PTZ camera.

Referring to FIG. 4, the controller 160 sets a frame number for the SD camera to 10 within the limit processing frame count of the codec unit 150, and a plurality of HD-SDI The number of frames for the camera can be set to 15, and the number of frames for the IP camera and the PTZ camera requiring precision monitoring can be set to 20 and 25, respectively.

Accordingly, the channel variable device 100 according to the number of frames can monitor the high-frame count through a PTZ camera or a remote IP camera connected via a LAN to an area where a precise monitoring is required or a remote area , And in a surveillance area in which the importance is somewhat lower, it is possible to monitor with a low frame count through an SD camera and an HD-SDI camera.

5 is a diagram illustrating an example of a channel allocation of a channel variable device 100 according to an embodiment of the present invention. As shown in FIG. 5, the IP interface unit 170 may be connected to a hub 200 The IP signal processing unit 180 can receive a plurality of different IP signals received from the hub 200 through the IP interface unit 170.

The IP signal processing unit 180 separates a plurality of IP signals received from the hub 200 into different IP signals, generates image information corresponding to the separated IP signals, Lt; / RTI >

 The codec unit 150 may allocate a channel for image information corresponding to each IP signal, and may adjust the number of frames for each channel.

In addition, the codec unit 150 adjusts the number of frames of the channel allocated according to the SD signal or the HD-SDI signal received from the camera connected to the plurality of different connector units 110, A channel corresponding to each of the plurality of different IP signals may be added, and the number of available frames may be divided and allocated to each added channel.

Accordingly, the codec unit 150 can allocate the number of available frames according to the number of the plurality of different IP signals, so that the number of IP-based cameras connected to the hub 200 can be increased.

At this time, the controller 160 generates setting information for assigning the number of frames allocated to the SD signal or the HD-SDI signal and the number of frames to be allocated to the channel corresponding to the IP signal to the codec unit 150 And the codec unit 150 may vary the number of frames per channel corresponding to the SD signal, the HD-SDI signal, and the IP signal within the limit processing frame number according to the setting information.

As described above, the channel variable apparatus 100 according to the number of frames controls the number of frames allocated to each connector unit 110 in the limit processing frame count of the codec unit 150, By assigning to a channel for a camera, the channel can be easily expanded without adding a separate DVR for channel increase.

FIG. 6 is a flowchart illustrating a channel variable method according to an embodiment of the present invention. Referring to FIG. 6, the path switching unit 120 receives an output signal from a camera through a connector 110 SDI signal processing unit 130 that processes the HD-SDI signal when it receives the SD or HD-SDI signal (S2) and assumes it to be an HD-SDI signal (S3).

Accordingly, the path switching unit 120 interlocks with the HD-SDI signal processing unit 130 to transmit the SD signal to the SD signal processing unit 140 when the SD signal is detected (S5) It is possible to switch the signal transmission path of the signal transmission unit 120 (S6).

The HD-SDI signal processing unit 130 or the SD signal processing unit 140 may process the signal received from the path switching unit 120 (S7) to generate image information (S8).

In addition, the IP signal processing unit 180 may receive and process one or more IP-based video signals corresponding to different channels (S9), and may generate image information corresponding to the IP signals (S8).

The codec unit 150 allocates a channel corresponding to at least one of the HD-SDI signal processing unit 130 and the SD signal processing unit 140 and one or more pieces of image information received through the IP signal processing unit 180 can do.

At this time, if the sum of the number of frames per channel allocated to the video information corresponding to each of the SD signal, the HD-SDI signal and the IP signal exceeds the limit processing frame number preset in the codec unit (S10).

Accordingly, if the number of frames to be processed does not exceed the limit number of frames, the codec unit 150 outputs video information corresponding to each channel with the number of frames per channel according to the initial setting (S11) The frame number of each channel may be varied within the limit processing frame count of the codec (S12), and the video information may be outputted through each channel with the variable number of frames per channel (S11).

The foregoing embodiments and advantages are merely exemplary and are not to be construed as limiting the present invention. However, the present invention is not limited to the above-described embodiments, and various changes and modifications may be made by those skilled in the art without departing from the scope of the present invention. .

100: channel variable device 110: connector part
120: path switching unit 130: HD-SDI signal processing unit
131: Signal detector 140: SD signal processor
150: codec unit 160: control unit
170: IP interface unit 180: IP signal processing unit
200: Hub

Claims (8)

An SD signal processing unit for processing an SD signal;
An HD-SDI signal processing unit for processing an HD-SDI signal and detecting an SD signal and an HD-SDI signal;
SDI signal processing unit when it receives the SD or HD-SDI signal and transmits the SD-SDI signal to the HD-SDI signal processing unit when it is assumed to be an HD-SDI signal, A switching portion;
An IP signal processing unit for receiving and processing one or more IP-based video signals corresponding to different channels;
A CODEC for varying the number of frames per channel according to the SD signal, the HD-SDI signal, and the IP signal within the limit processing frame count of the codec; And
Generating setting information in which the number of frames per channel corresponding to at least one of the SD signal, the HD-SDI signal and the IP signal different from each other within the limit processing frame number is provided to the codec unit, And controlling the number of frames per sub-channel to be variable.
The method according to claim 1,
Wherein the HD-SDI signal processing unit further comprises a signal detecting unit for detecting the SD signal and the HD-SDI signal and switching the signal transmission path of the path switching unit to be switched to the SD signal processing unit when the SD signal is an SD signal. A channel variable device according to the number control.
The method according to claim 1,
Further comprising a connector unit connected to the path switching unit for receiving the SD and HD-SDI signals and based on a BNC interface.
delete The method according to claim 1,
Wherein the codec unit is operable to transmit at least one of the SD signal and the HD-SDI signal within the limited processing frame number for the additional channel corresponding to at least one of the SD signal, the HD-SDI signal and the IP signal exceeding the limit processing frame number And the number of remaining frames is allocated to the number of frames of the additional channel to increase the number of channels.
The method according to claim 1,
Wherein the IP signal processing unit is connected to a hub and separates different IP signals received from the hub.
The method of claim 6,
The codec unit allocates a channel corresponding to each IP signal separated through the IP signal processing unit, changes the number of frames of a channel corresponding to at least one of the SD signal and the HD-SDI signal, And the number of channels is increased by assigning the number of frames to the number of frames of the channel corresponding to the IP signal.
SDI signal processing unit for processing an HD-SDI signal assuming that the SD-SDI signal is an HD-SDI signal when the SD-SDI signal is received, Switching to be transmitted to the signal processing unit;
Receiving and processing one or more IP-based video signals corresponding to different channels by the IP signal processing unit;
A codec unit allocates a channel for each signal processed through at least one of the HD-SDI signal processing unit and the SD signal processing unit and the IP signal processing unit, and allocates a channel for each channel according to the SD signal, HD-SDI signal, Varying the number of frames within the limit processing frame count of the codec unit; And
The control unit generates setting information in which the number of frames per channel corresponding to at least one of the SD signal, the HD-SDI signal, and the IP signal different from each other within the limit processing frame number is provided to the codec unit, And adjusting the number of frames per channel of the codec unit.

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