CN111614870A - Distributed camera management system - Google Patents
Distributed camera management system Download PDFInfo
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- CN111614870A CN111614870A CN202010334180.2A CN202010334180A CN111614870A CN 111614870 A CN111614870 A CN 111614870A CN 202010334180 A CN202010334180 A CN 202010334180A CN 111614870 A CN111614870 A CN 111614870A
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- 230000005540 biological transmission Effects 0.000 claims abstract description 9
- 239000002131 composite material Substances 0.000 claims description 15
- 238000004891 communication Methods 0.000 claims description 6
- 230000005236 sound signal Effects 0.000 claims description 6
- 230000002457 bidirectional effect Effects 0.000 claims description 4
- 238000005034 decoration Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 10
- 238000012423 maintenance Methods 0.000 description 1
- 238000012857 repacking Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/765—Interface circuits between an apparatus for recording and another apparatus
- H04N5/77—Interface circuits between an apparatus for recording and another apparatus between a recording apparatus and a television camera
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
- H04N5/92—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
- H04N7/0125—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level one of the standards being a high definition standard
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/10—Adaptations for transmission by electrical cable
- H04N7/102—Circuits therefor, e.g. noise reducers, equalisers, amplifiers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/10—Adaptations for transmission by electrical cable
- H04N7/108—Adaptations for transmission by electrical cable the cable being constituted by a pair of wires
Abstract
The invention discloses a distributed camera management system, which comprises a 4K camera end and a 4K record player end, wherein a UHD-POC distributed module is arranged at the 4K camera end, and a UHD-POC terminal processor is arranged at the 4K record player end; and the 4K camera end and the 4K video recorder end realize the transmission of audio and 4K video, direct current power supply and pan-tilt control by utilizing a coaxial cable by utilizing the UHD-POC distributed module and the UHD-POC terminal processor. The system can upgrade the traditional recording and broadcasting system into a 4K recording and broadcasting system supporting UHD-POC technology under the condition of not damaging the original cable wiring and decoration environment, improves the system picture quality, stability and installation efficiency, and greatly saves the cost.
Description
Technical Field
The invention relates to the technical field of video transmission, in particular to a distributed camera management system.
Background
The ubiquitous image quality of traditional recorded broadcast system is clear inadequately, and the detail presents abundant characteristics inadequately, and traditional recorded broadcast system generally comprises a recorded broadcast machine and many cameras moreover, and the camera end needs the power cord except, still needs coaxial video line, and cloud platform control line and recorded broadcast machine link to each other, and as shown in fig. 1 be the solution scheme schematic diagram of recorded broadcast system among the prior art, including many cameras, coaxial video line and control line etc. can see from fig. 1:
a simple 4 machine position tradition recorded broadcast system in classroom, the wiring is just very complicated, every camera all need reserve power source on the wall, still need to have coaxial video line, the audio line, the cloud platform control line links to each other with recorded broadcast machine, the wiring environment is complicated, if repacking POC camera, still need purchase new camera and recorded broadcast machine, still need to rewire the classroom or even repack and repair the room classroom, so both increased the cost and needed professional to debug, greatly increased recorded broadcast system's maintenance cost.
Disclosure of Invention
The invention aims to provide a distributed camera management system which can upgrade a traditional recording and broadcasting system into a 4K recording and broadcasting system supporting UHD-POC technology under the condition of not damaging the original cable wiring and decoration environment, improves the system picture quality, stability and installation efficiency and greatly saves the cost.
The purpose of the invention is realized by the following technical scheme:
a distributed camera management system comprises a 4K camera end and a 4K recorder end, wherein a UHD-POC distributed module is arranged at the 4K camera end, and a UHD-POC terminal processor is arranged at the 4K recorder end;
the UHD-POC distributed module and the UHD-POC terminal processor are utilized to enable the 4K camera end and the 4K recording and broadcasting end to realize the transmission of audio and 4K video, direct current power supply and cradle head control by utilizing a coaxial cable;
the UHD-POC distributed module specifically comprises a POC & COC composite video output interface, a Filter module, a voltage reduction module, a power output interface, a video input port, an audio input port, an HDMI receiving chip, an AVT sending chip and an RS232/RS485 input/output module, wherein:
the POC and COC composite video output interface is connected with the UHD-POC terminal processor through a coaxial line, high-voltage direct-current components provided by the UHD-POC terminal processor in POC and COC composite video signals are extracted after being processed by the Filter module, and then are reduced to 12V through the voltage reduction module to be used as a system power supply to supply power to the module, and meanwhile, a 12V power supply is provided for the 4K camera end through the power output interface;
the video output and the audio output of the 4K camera end are connected to the video input port and the audio input port of the UHD-POC distributed module, the video and audio input signals are converted into parallel digital video signals through an HDMI receiving chip and transmitted to the AVT sending chip, and the converted video and audio signals are transmitted to the POC & COC composite video output interface through an interface with a POC function;
a bidirectional modulation and demodulation circuit is integrated in the AVT sending chip, the control of the rotation of a cradle head by the 4K recorder end is realized through the communication with the RS232/RS485 input/output module, and the position information is sent from the 4K camera end to the 4K recorder end;
the UHD-POC terminal processor comprises an ARM processing module and a plurality of audio and video processing modules, wherein:
each audio and video processing module corresponds to one UHD-POC distributed module, the number of the audio and video processing modules is set according to the use environment, meanwhile, each audio and video processing module is respectively connected with the ARM processing module through a communication interface, the ARM processing module is used for realizing the centralized control and management of the audio and video processing modules, and the distributed centralized management is realized in a network access mode;
in the audio and video processing module, a power supply adopts 24V input, is rectified and filtered by a Filter circuit and then provides a power supply for a UHD-POC distributed module connected with the power supply through a coaxial cable, and an internal DC-DC voltage reduction chip is stepped down by 24V so as to ensure the stable power supply of the whole module;
after being separated by a Filter circuit, the composite video signal transmitted back by the UHD-POC distributed module at the 4K camera end is directly output to a back-end processing device through an AVT receiving chip, and simultaneously, an audio signal is converted into an analog signal through a DAC module and is output to the 4K recording and broadcasting machine end or an audio acquisition device; and the control signal separated by the Filter circuit is directly sent to an AVT receiving chip for demodulation and output, and is converted into a standard RS232/RS485 format to be connected with the 4K recording and broadcasting machine terminal.
According to the technical scheme provided by the invention, the system can upgrade the traditional recording and broadcasting system into a 4K recording and broadcasting system supporting UHD-POC technology under the condition of not damaging the original cable wiring and decoration environment, so that the system picture quality, the stability and the installation efficiency are improved, and the cost is greatly saved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a schematic diagram of a recording and broadcasting system in the prior art;
fig. 2 is a schematic structural diagram of a distributed camera management system according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the internal structure of the UHD-POC distributed module according to the embodiment of the present invention;
FIG. 4 is a schematic diagram of the internal structure of a UHD-POC terminal processor according to an embodiment of the present invention;
fig. 5 is a schematic wiring diagram after the system according to the embodiment of the present invention is used.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
The following will further describe the embodiments of the present invention in detail with reference to the accompanying drawings, and as shown in fig. 2, is a schematic structural diagram of a distributed camera management system provided by the embodiments of the present invention, where the system includes a 4K camera end and a 4K recorder end, a UHD-POC (Ultra High Definition-Power over Coax) distributed module is disposed at the 4K camera end, and a UHD-POC terminal processor is disposed at the 4K recorder end;
the UHD-POC distributed module and the UHD-POC terminal processor are utilized to enable the 4K camera end and the 4K recording and broadcasting end to realize the transmission of audio and 4K video, direct current power supply and cradle head control by utilizing a coaxial cable;
fig. 3 is a schematic diagram illustrating an internal structure of a UHD-POC distributed module according to an embodiment of the present invention, where the UHD-POC distributed module specifically includes a POC & COC (Power over Coax & Control over Coax, Coax Power supply & Coax Control) composite video output interface, a Filter module, a voltage dropping module, a Power output interface, a video input port, an audio input port, an HDMI receiving chip, an AVT transmitting chip, and an RS232/RS485 input/output module, where:
the POC & COC composite video output interface is connected with the UHD-POC terminal processor through a coaxial line, and high-voltage direct-current components (24V DC power supply) provided by the UHD-POC terminal processor in the POC & COC composite video signals are extracted after being processed by the Filter module; the voltage is reduced to 12V by the voltage reduction module to be used as a system power supply to supply power to the module, and meanwhile, a 12V power supply is provided for the 4K camera end by a power output interface, so that a 220V AC power adapter is not needed for the 4K camera end; in the specific implementation, the power supply circuit for the 4K camera end comprises an overcurrent protection circuit and a short-circuit protection circuit, so that the safety can be improved, and the 4K camera end and the UHD-POC distributed module are protected;
the video output and the audio output of the 4K camera end are connected to the video input port and the audio input port of the UHD-POC distributed module, the video and audio input signals are converted into parallel digital video signals through an HDMI receiving chip and transmitted to an AVT sending chip, and the converted video and audio signals are transmitted to the POC & COC composite video output interface through an interface with a POC function;
a bidirectional modulation and demodulation circuit is integrated in the AVT sending chip, and the control of the rotation of a cradle head by the 4K recorder end and the sending of position information from the 4K camera end to the 4K recorder end are realized through the communication with the RS232/RS485 input/output module; through tests, the maximum transmission baud rate of the RS232 format is 115200bps, so that the requirements of various cameras can be met, and a good foundation is laid for the usability of the system;
the UHD-POC distributed module is simple and easy to use, does not need external independent power supply, can realize high-definition video signal and audio remote transmission, direct-current power transmission and bidirectional transmission of control signals, has no special requirement on a camera end, and has strong adaptability;
fig. 4 is a schematic diagram of an internal structure of a UHD-POC terminal processor according to an embodiment of the present invention, where the UHD-POC terminal processor includes an ARM processing module and a plurality of audio/video processing modules, where:
each audio and video processing module corresponds to one UHD-POC distributed module, the number of the audio and video processing modules is set according to the use environment, meanwhile, each audio and video processing module is respectively connected with the ARM processing module through a communication interface, the ARM processing module is used for realizing the centralized control and management of the audio and video processing modules, and the distributed centralized management is realized in a network access mode;
in the audio and video processing module, a power supply adopts 24V input, is rectified and filtered by a Filter circuit and then provides a power supply for a UHD-POC distributed module connected with the power supply through a coaxial cable, and an internal DC-DC voltage reduction chip is stepped down by 24V so as to ensure the stable power supply of the whole module;
after being separated by a Filter circuit, the composite video signal transmitted back by the UHD-POC distributed module at the 4K camera end is directly output to a back-end processing device through an AVT receiving chip, and simultaneously, an audio signal is converted into an analog signal through a DAC module and is output to the 4K recording and broadcasting machine end or an audio acquisition device; and the control signal separated by the Filter circuit is directly sent to an AVT receiving chip for demodulation and output, and is converted into a standard RS232/RS485 format to be connected with the 4K recording and broadcasting machine terminal.
In the specific implementation, the UHD-POC terminal processor adopts a 24V direct current adapter for power supply, so that the power supply safety of equipment is ensured, and the cost can be reduced by adopting a power adapter without power according to the number of audio and video processing modules.
In addition, the control signal sent by the 4K recorder can be transmitted in two directions, including the control of the pan-tilt head of the 4K camera and the reply of the position information of the 4K camera.
The video formats that the above system can transmit include 4K30 frames, 1080p60 frames, 1080p50 frames, 1080p30 frames and 1080p25 frames.
As shown in fig. 5, which is a schematic diagram of the wiring after the system according to the embodiment of the present invention is adopted, it can be seen that the wiring of the whole classroom can be completed by using the original coaxial video cable only by installing each module, which is very convenient and simple. In summary, the system according to the embodiment of the present invention can rapidly upgrade the existing common video cameras and recording and playing machines to 4K video cameras and 4K recording and playing machines supporting UHD-POC technology without damaging the existing decoration environment and cable wiring; meanwhile, the connected cameras are managed in a distributed and centralized mode, and an original common recording and broadcasting system is upgraded to a distributed camera management system.
It is noted that those skilled in the art will recognize that embodiments of the present invention are not described in detail herein.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (4)
1. A distributed camera management system is characterized by comprising a 4K camera end and a 4K record player end, wherein a UHD-POC distributed module is arranged at the 4K camera end, and a UHD-POC terminal processor is arranged at the 4K record player end;
the UHD-POC distributed module and the UHD-POC terminal processor are utilized to enable the 4K camera end and the 4K recording and broadcasting end to realize the transmission of audio and 4K video, direct current power supply and cradle head control by utilizing a coaxial cable;
the UHD-POC distributed module specifically comprises a POC & COC composite video output interface, a Filter module, a voltage reduction module, a power output interface, a video input port, an audio input port, an HDMI receiving chip, an AVT sending chip and an RS232/RS485 input/output module, wherein:
the POC and COC composite video output interface is connected with the UHD-POC terminal processor through a coaxial line, high-voltage direct-current components provided by the UHD-POC terminal processor in POC and COC composite video signals are extracted after being processed by the Filter module, and then are reduced to 12V through the voltage reduction module to be used as a system power supply to supply power to the module, and meanwhile, a 12V power supply is provided for the 4K camera end through the power output interface;
the video output and the audio output of the 4K camera end are connected to the video input port and the audio input port of the UHD-POC distributed module, the video and audio input signals are converted into parallel digital video signals through an HDMI receiving chip and transmitted to the AVT sending chip, and the converted video and audio signals are transmitted to the POC & COC composite video output interface through an interface with a POC function;
a bidirectional modulation and demodulation circuit is integrated in the AVT sending chip, the control of the rotation of a cradle head by the 4K recorder end is realized through the communication with the RS232/RS485 input/output module, and the position information is sent from the 4K camera end to the 4K recorder end;
the UHD-POC terminal processor comprises an ARM processing module and a plurality of audio and video processing modules, wherein:
each audio and video processing module corresponds to one UHD-POC distributed module, the number of the audio and video processing modules is set according to the use environment, meanwhile, each audio and video processing module is respectively connected with the ARM processing module through a communication interface, the ARM processing module is used for realizing the centralized control and management of the audio and video processing modules, and the distributed centralized management is realized in a network access mode;
in the audio and video processing module, a power supply adopts 24V input, is rectified and filtered by a Filter circuit and then provides a power supply for a UHD-POC distributed module connected with the power supply through a coaxial cable, and an internal DC-DC voltage reduction chip is stepped down by 24V so as to ensure the stable power supply of the whole module;
after being separated by a Filter circuit, the composite video signal transmitted back by the UHD-POC distributed module at the 4K camera end is directly output to a back-end processing device through an AVT receiving chip, and simultaneously, an audio signal is converted into an analog signal through a DAC module and is output to the 4K recording and broadcasting machine end or an audio acquisition device; and the control signal separated by the Filter circuit is directly sent to an AVT receiving chip for demodulation and output, and is converted into a standard RS232/RS485 format to be connected with the 4K recording and broadcasting machine terminal.
2. The distributed camera management system of claim 1,
and the UHD-POC terminal processor adopts a 24V direct current adapter for power supply, and adopts a power adapter without power according to the number of the audio and video processing modules.
3. The distributed camera management system of claim 1,
the video formats transmitted by the system comprise 4K30 frames, 1080p60 frames, 1080p50 frames, 1080p30 frames and 1080p25 frames.
4. The distributed camera management system of claim 1,
the control signal sent by the 4K video recorder can be transmitted in two directions, and comprises control over the pan-tilt head of the 4K camera and reply to position information of the 4K camera.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010334180.2A CN111614870A (en) | 2020-04-24 | 2020-04-24 | Distributed camera management system |
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| CN202010334180.2A CN111614870A (en) | 2020-04-24 | 2020-04-24 | Distributed camera management system |
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