CN111355930A

CN111355930A - Analog video processing method, system and device

Info

Publication number: CN111355930A
Application number: CN202010182869.8A
Authority: CN
Inventors: 董煜民
Original assignee: Zhejiang Dahua Technology Co Ltd
Current assignee: Zhejiang Dahua Technology Co Ltd
Priority date: 2020-03-16
Filing date: 2020-03-16
Publication date: 2020-06-30
Anticipated expiration: 2040-03-16
Also published as: CN111355930B

Abstract

The invention provides a method, a system and a device for processing an analog video, wherein the method comprises the following steps: the method comprises the steps that a combiner device obtains N paths of analog video signals to be combined, the N paths of analog video signals are analog video signals sent by N camera devices electrically connected with the combiner device, each camera device in the N camera devices outputs one path of analog video signal, the frame rate of each path of analog video signal in the N paths of analog video signals is M frames per second, N is an integer greater than 1, and M is a number greater than 1; the combining equipment is used for synthesizing the N paths of analog video signals to obtain a synthesized single path of analog video signal; and the combining equipment sends the single-path analog video signal to the splitting equipment so that the splitting equipment obtains the N-path analog video signals according to the single-path analog video signal, wherein data transmission is carried out between the combining equipment and the splitting equipment through a cable.

Description

Analog video processing method, system and device

Technical Field

The invention relates to the technical field of video monitoring, in particular to an analog video processing method, system and device.

Background

In practical engineering applications, an existing analog monitoring system including a plurality of analog cameras often transmits corresponding analog Video signals to a backend device, such as a Digital Video Recorder (DVR), through a long transmission cable (e.g., a coaxial cable, a twisted pair cable, etc.) separately for each camera, and the analog Video signals are decoded by the backend device and displayed by a display. However, the distance between the monitoring point and the monitoring room is often hundreds of meters, and the cost of engineering wiring is high. In addition, once the buried coaxial line is damaged, rewiring is needed to improve monitoring quality.

Therefore, the construction and wiring cost of the conventional simulation monitoring system is high.

Disclosure of Invention

The invention provides a method, a system and a device for processing an analog video, which are used for reducing the construction wiring cost of an analog monitoring system.

In a first aspect, an embodiment of the present invention provides an analog video processing method, where the method includes:

the method comprises the steps that a combiner device obtains N paths of analog video signals to be combined, wherein the N paths of analog video signals are analog video signals sent by N camera devices electrically connected with the combiner device, each camera device in the N camera devices outputs one path of analog video signal, the frame rate of each path of analog video signal in the N paths of analog video signals is M frames per second, N is an integer greater than 1, and M is a number greater than 1;

the combining equipment is used for synthesizing the N paths of analog video signals to obtain a synthesized single path of analog video signal;

and the combining equipment sends the single-path analog video signal to the splitting equipment so that the splitting equipment obtains the N-path analog video signals according to the single-path analog video signal, wherein data transmission is carried out between the combining equipment and the splitting equipment through a cable.

Optionally, the combining device performs synthesis processing on the N analog video signals to obtain a synthesized single-channel analog video signal, including:

the combining device adjusts the N paths of analog video signals to the same phase to obtain the adjusted N paths of analog video signals;

and the combiner equipment combines the adjusted N paths of analog video signals to obtain a combined single path of analog video signal.

Optionally, the adjusting, by the combining device, the N analog video signals to the same phase to obtain the adjusted N analog video signals includes:

the combining equipment takes any one of the N paths of analog video signals as a phase reference signal;

the combining equipment determines the phase relation between the (N-1) paths of analog video signals except the phase reference signal and the phase reference signal in the N paths of analog video signals;

and the combiner equipment adjusts the (N-1) paths of analog video signals to be in the same phase with the phase of the phase reference signal according to the phase relation, and obtains the adjusted N paths of analog video signals.

Optionally, the combining device combines the adjusted N analog video signals to obtain a combined single analog video signal, including:

the combining equipment sequentially extracts image frames to be combined from each analog video signal of the adjusted N analog video signals according to a frame period of 1/M second;

and the combining equipment combines the image frames to be combined together at the moment of non-effective images to obtain a combined single-path analog video signal, wherein the (Nn + (k-1)) th frame in the single-path analog video signal is the picture of the k-th path analog video signal in the N paths of adjusted analog video signals, k is an integer which is more than 1 and not more than N, and N is any integer.

Optionally, if the single-channel analog video signal is synthesized from two channels of analog video signals including the adjusted first channel of analog video signal and the adjusted second channel of analog video signal, a 2 nth frame of the single-channel analog video signal is a picture of the first channel of analog video signal, a (2n +1) th frame of the single-channel analog video signal is a picture of the second channel of analog video signal, where n is any integer.

Optionally, if the single-channel analog video signal is synthesized from three analog video signals including the adjusted first channel analog video signal, the adjusted second channel analog video signal, and the adjusted third channel analog video signal, a 3n frame of the single-channel analog video signal is a picture of the first channel analog video signal, a (3n +1) frame of the single-channel analog video signal is a picture of the second channel analog video signal, and a (3n +2) frame of the single-channel analog video signal is a picture of the third channel analog video signal.

Optionally, if the single-channel analog video signal is synthesized from four channels of analog video signals including the adjusted first channel of analog video signal, the adjusted second channel of analog video signal, the adjusted third channel of analog video signal, and the adjusted fourth channel of analog video signal, 4n frames of the single-channel analog video signal are pictures of the first channel of analog video signal, a (4n +1) th frame of the single-channel analog video signal is a picture of the second channel of analog video signal, a (4n +2) th frame of the single-channel analog video signal is a picture of the third channel of analog video signal, and a (4n +3) th frame of the single-channel analog video signal is a picture of the fourth channel of analog video signal.

Optionally, after the combining device performs combining processing on the N analog video signals to obtain a combined single analog video signal, the method further includes:

and the combiner equipment carries out filtering processing on the single-path analog video signal to obtain a filtered single-path analog video signal.

In a second aspect, an embodiment of the present invention further provides an analog video processing method, where the method includes:

the method comprises the steps that a shunting device receives a single-path analog video signal sent by a combining device, wherein the single-path analog video signal is obtained after the combining device synthesizes N paths of analog video signals, data transmission is carried out between the combining device and the shunting device through a cable, the N paths of analog video signals are analog video signals sent by N image pickup devices electrically connected with the combining device, each image pickup device in the N image pickup devices outputs one path of analog video signal, the frame rate of each path of analog video signal in the N paths of analog video signals is M frames/second, N is an integer larger than 1, and M is a number larger than 1;

and the shunting equipment carries out shunting processing on the single-path analog video signal to obtain N paths of analog video signals after shunting.

Optionally, the splitting device performs splitting processing on the single-path analog video signal to obtain N split paths of analog video signals, including:

the shunting equipment disperses the single-path analog video signal into N paths of video signals, each path of video signal in the N paths of video signals lags behind one frame period path by path, and the difference between the first path of video signal and the N path of video signal in the N paths of video signals is (N-1) frame periods;

and the shunting equipment obtains N paths of analog video signals after shunting according to the N paths of video signals.

If the branched N analog video signals include a first branched video signal and a second branched video signal, the 2N frame and the (2N +1) frame of the first branched video signal are the 2N frame of the single analog video signal, and the (2N +1) frame and the (2N +2) frame of the second branched video signal are the (2N +1) frame of the single analog video signal.

Optionally, if the N branched analog video signals include a first branched video signal, a second branched video signal, and a third branched video signal, a 3N frame, a (3N +1) th frame, and a (3N +2) th frame of the first branched video signal are 3N frames of the one-way analog video signal, a (3N +1) th frame, a (3N +2) th frame, and a (3N +3) th frame of the second branched video signal are (3N +1) th frames of the one-way analog video signal, and a (3N +2) th frame, a (3N +3) th frame, and a (3N +4) th frame of the third branched video signal are (3N +2) th frames of the one-way analog video signal.

Optionally, if the N divided analog video signals include a first divided video signal, a second divided video signal, a third divided video signal and a fourth divided video signal, the 4N frame, the (4N +1) th frame, the (4N +2) th frame and the (4N +3) th frame of the first divided video signal are the 4N frame of the one-way analog video signal, the (4N +1) th frame, the (4N +2) th frame, the (4N +3) th frame and the (4N +4) th frame of the second divided video signal are the (4N +1) th frame of the one-way analog video signal, the (4N +2) th frame, the (4N +3) th frame, the (4N +4) th frame and the (4N +5) th frame of the third divided video signal are the (4N +2) th frame of the one-way analog video signal, and the (4N +3) th frame and the (4N +5) th frame of the one-way analog video signal are the (4N +2) th frame of the one-way analog video signal, The (4n +4) th frame, the (4n +5) th frame, and the (4n +6) th frame are the (4n +3) th frame of the one-way analog video signal.

In a third aspect, an embodiment of the present invention further provides an analog video processing system, including: the system comprises a combining device and a shunting device which performs data transmission with the combining device through a cable; wherein:

the combining device is configured to obtain N analog video signals to be combined, combine the N analog video signals to obtain a combined single-channel analog video signal, and send the single-channel analog video signal to the splitting device, where the N analog video signals are analog video signals sent by N image capturing devices electrically connected to the combining device, each image capturing device of the N image capturing devices outputs one channel of analog video signals, a frame rate of each analog video signal of the N analog video signals is M frames/second, N is an integer greater than 1, and M is a number greater than 1;

the shunting device is used for receiving the single-path analog video signal sent by the combining device and carrying out shunting processing on the single-path analog video signal to obtain N paths of analog video signals after shunting.

In a fourth aspect, an embodiment of the present invention further provides a combining device, including:

the system comprises N impedance conversion units electrically connected with N camera devices, wherein the N impedance conversion units are used for receiving N paths of analog video signals to be synthesized, which are sent by the N camera devices, each camera device in the N camera devices is electrically connected with one impedance conversion unit, each camera device in the N camera devices outputs one path of analog video signal, the frame rate of each path of analog video signal in the N paths of analog video signals is M frames/second, N is an integer greater than 1, and M is a number greater than 1;

the combining processing unit is electrically connected with the N impedance transformation units and is used for receiving the N paths of analog video signals and synthesizing the N paths of analog video signals to obtain a synthesized single-path analog video signal;

and the sending unit is electrically connected with the combining processing unit and is used for receiving the single-path analog video signal and sending the single-path analog video signal to the shunting equipment electrically connected with the sending unit so that the shunting equipment obtains the N paths of analog video signals according to the single-path analog video.

Optionally, the combining processing unit includes a phase processing unit and a combining unit electrically connected to the phase processing unit, wherein:

the phase processing unit is used for adjusting the received N paths of analog video signals to the same phase, obtaining N paths of adjusted analog video signals and sending the N paths of adjusted analog video signals to the synthesis unit;

and the synthesis unit synthesizes the adjusted N paths of analog video signals to obtain a synthesized single path of analog video signal.

Optionally, the phase processing unit includes a phase detection unit and a phase modulation unit electrically connected to the phase detection unit, where:

the phase discrimination unit is used for taking any one of the N paths of analog video signals as a phase reference signal and determining the phase relation between (N-1) paths of analog video signals except the phase reference signal in the N paths of analog video signals and the phase reference signal;

and the phase modulation unit is used for adjusting the phase of the (N-1) paths of analog video signals to be the same as the phase of the phase reference signal according to the phase relation, and obtaining N paths of adjusted analog video signals.

Optionally, the synthesis unit comprises a control unit and a switch unit electrically connected to the control unit, wherein:

the control unit is used for sending a control signal to the switch unit when detecting that the adjusted N-channel analog video signals meet the combination condition;

the switch unit is used for receiving and responding to the control signal and sequentially extracting image frames to be synthesized from each analog video signal of the adjusted N analog video signals according to a frame period of 1/M second; and the switching unit combines the image frames to be combined together at the moment of non-effective images to obtain a combined single-path analog video signal, wherein the (Nn + (k-1)) th frame in the single-path analog video signal is the picture of the k-th path analog video signal in the N paths of adjusted analog video signals, k is an integer which is more than 1 and not more than N, and N is any integer.

Optionally, the sending unit includes a filtering unit electrically connected to the switching unit, and the filtering unit is configured to perform filtering processing on the single-channel analog video signal to obtain a filtered single-channel analog video signal.

In a fifth aspect, an embodiment of the present invention further provides a routing device, including:

the image capturing device comprises an impedance conversion unit which is electrically connected with the combining device and is used for receiving a single-path analog video signal sent by the combining device, wherein the single-path analog video signal is obtained by combining N paths of analog video signals by the combining device, the N paths of analog video signals are analog video signals sent by N image capturing devices which are electrically connected with the combining device, each image capturing device in the N paths of image capturing devices outputs one path of analog video signal, the frame rate of each path of analog video signal in the N paths of analog video signals is M frames/second, N is an integer greater than 1, and M is a number greater than 1;

and the shunt processing unit is electrically connected with the impedance transformation unit and is used for performing shunt processing on the single-path analog video signal to obtain N paths of analog video signals after shunt.

Optionally, the shunt processing unit includes a phase modulation unit electrically connected to the impedance transformation unit, wherein:

the impedance conversion unit is used for dispersing the single-path analog video signal into N paths of video signals;

the phase modulation unit is used for delaying each path of video signals in the N paths of video signals by one frame period one by one and sending N paths of analog video signals after branching, wherein the phase difference between a first path of video signals and an N-th path of video signals in the N paths of video signals is (N-1) frame periods.

Optionally, the shunt processing unit further includes a control unit electrically connected to the impedance transformation unit and the phase modulation unit, respectively, and N switch units electrically connected to the control unit, and the N switch units are electrically connected to the impedance transformation unit, wherein:

the control unit is used for controlling the phase modulation unit to perform phase adjustment on each path of video signals in the N paths of video signals and controlling the N switch units to output the N paths of analog video signals after the paths are divided.

In a sixth aspect, an embodiment of the present invention further provides an analog video processing apparatus, where the apparatus includes:

the device comprises an acquisition module, a combining module and a processing module, wherein the acquisition module is used for acquiring N paths of analog video signals to be synthesized, the N paths of analog video signals are analog video signals sent by N image pickup devices electrically connected with the combining device, each image pickup device in the N image pickup devices outputs one path of analog video signal, the frame rate of each path of analog video signal in the N paths of analog video signals is M frames per second, N is an integer greater than 1, and M is a number greater than 1;

the combiner module is used for synthesizing the N paths of analog video signals to obtain a synthesized single path of analog video signal;

and the sending module is used for sending the single-path analog video signal to a splitting device so that the splitting device obtains the N-path analog video signals according to the single-path analog video, wherein data transmission is performed between the combining device and the splitting device through a cable.

Optionally, the combining module is configured to:

adjusting the N paths of analog video signals to the same phase to obtain N paths of adjusted analog video signals;

and synthesizing the N paths of adjusted analog video signals to obtain a synthesized single-path analog video signal.

Optionally, the combining module is configured to:

taking any one of the N paths of analog video signals as a phase reference signal;

determining the phase relation between (N-1) paths of analog video signals except the phase reference signal in the N paths of analog video signals and the phase reference signal;

and according to the phase relation, adjusting the (N-1) paths of analog video signals to be in the same phase with the phase of the phase reference signal, and obtaining N paths of adjusted analog video signals.

Optionally, the combining module is configured to:

sequentially extracting image frames to be synthesized from each analog video signal of the adjusted N analog video signals according to a frame period of 1/M second;

and at the moment of non-effective images, combining the image frames to be combined together to obtain a combined single-path analog video signal, wherein the (Nn + (k-1)) th frame in the single-path analog video signal is the picture of the k-th path analog video signal in the adjusted N paths of analog video signals, k is an integer which is more than 1 and not more than N, and N is any integer.

Optionally, if the single-channel analog video signal synthesized by the combining module is synthesized by two channels of analog video signals including the adjusted first channel of analog video signal and the adjusted second channel of analog video signal, a 2 nth frame of the single-channel analog video signal is a picture of the first channel of analog video signal, and a (2n +1) th frame of the single-channel analog video signal is a picture of the second channel of analog video signal, where n is any integer.

Optionally, if the single-channel analog video signal synthesized by the combining module is synthesized by three channels of analog video signals including the adjusted first channel of analog video signal, the adjusted second channel of analog video signal, and the adjusted third channel of analog video signal, a 3 nth frame of the single-channel analog video signal is a picture of the first channel of analog video signal, a (3n +1) th frame of the single-channel analog video signal is a picture of the second channel of analog video signal, and a (3n +2) th frame of the single-channel analog video signal is a picture of the third channel of analog video signal.

Optionally, if the single-channel analog video signal synthesized by the combining module is synthesized by four channels of analog video signals including the adjusted first channel of analog video signal, the adjusted second channel of analog video signal, the adjusted third channel of analog video signal, and the adjusted fourth channel of analog video signal, the 4n frame of the single-channel analog video signal is a picture of the first channel of analog video signal, the (4n +1) frame of the single-channel analog video signal is a picture of the second channel of analog video signal, the (4n +2) frame of the single-channel analog video signal is a picture of the third channel of analog video signal, and the (4n +3) frame of the single-channel analog video signal is a picture of the fourth channel of analog video signal.

Optionally, after the combining module performs combining processing on the N analog video signals to obtain a combined single analog video signal, the combining module is further configured to:

and filtering the single-path analog video signal to obtain a filtered single-path analog video signal.

In a seventh aspect, an embodiment of the present invention further provides an analog video processing apparatus, where the apparatus includes:

the device comprises a receiving module, a processing module and a processing module, wherein the receiving module is used for receiving a single-path analog video signal sent by a combining device, the single-path analog video signal is obtained by the combining device after the combining device performs combining processing on N paths of analog video signals, the combining device and the dividing device perform data transmission through a cable, the N paths of analog video signals are analog video signals sent by N image pickup devices electrically connected with the combining device, each image pickup device in the N image pickup devices outputs one path of analog video signal, the frame rate of each path of analog video signal in the N paths of analog video signals is M frames/second, N is an integer greater than 1, and M is a number greater than 1;

and the shunting module is used for carrying out shunting processing on the single-path analog video signal to obtain N paths of analog video signals after shunting.

Optionally, the splitting module is configured to:

the single-path analog video signal is scattered into N paths of video signals, each path of video signal in the N paths of video signals lags behind one frame period path by path, and the difference between the first path of video signal and the N path of video signal in the N paths of video signals is (N-1) frame periods;

and obtaining N paths of analog video signals after the branching according to the N paths of video signals.

Optionally, if the N branched analog video signals split by the splitting module include a first split video signal and a second split video signal, a 2N frame and a (2N +1) frame of the first split video signal are a 2N frame of the single analog video signal, and a (2N +1) frame and a (2N +2) frame of the second split video signal are a (2N +1) frame of the single analog video signal.

Optionally, if the N analog video signals split by the splitting module include a first split video signal, a second split video signal, and a third split video signal, a 3N frame, a (3N +1) th frame, and a (3N +2) th frame of the first split video signal are a 3N frame of the one-way analog video signal, a (3N +1) th frame, a (3N +2) th frame, and a (3N +3) th frame of the second split video signal are a (3N +1) th frame of the one-way analog video signal, and a (3N +2) th frame, a (3N +3) th frame, and a (3N +4) th frame of the third split video signal are a (3N +2) th frame of the one-way analog video signal.

Optionally, if the N analog video signals split by the splitting module include a first split video signal, a second split video signal, a third split video signal and a fourth split video signal, the 4N frame, the (4N +1) th frame, the (4N +2) th frame and the (4N +3) th frame of the first split video signal are the 4N frame of the one-way analog video signal, the (4N +1) th frame, the (4N +2) th frame, the (4N +3) th frame and the (4N +4) th frame of the second split video signal are the (4N +1) th frame of the one-way analog video signal, the (4N +2) th frame, the (4N +3) th frame, the (4N +4) th frame and the (4N +5) th frame of the third split video signal are the (4N +2) th frame of the one-way analog video signal, and the (4N +3) th frame and the (4N +5) th frame of the one-way analog video signal are the (4N +2) th frame of the one-way analog video signal, The (4n +4) th frame, the (4n +5) th frame, and the (4n +6) th frame are the (4n +3) th frame of the one-way analog video signal.

The invention has the following beneficial effects:

according to the analog video processing method, system and device provided by the embodiment of the invention, the combining equipment firstly acquires N paths of analog video signals to be synthesized, which are sent by N camera equipment electrically connected with the combining equipment, and then the N paths of analog video signals are synthesized, so that a synthesized single path of analog video signal is obtained. And then the combining equipment sends the single-path analog video signal to the splitting equipment so that the splitting equipment obtains N paths of analog video signals before combining according to the single-path analog video signal, wherein data transmission is carried out between the combining equipment and the splitting equipment through a cable. Therefore, no matter how many N camera devices are, the transmission of the analog video signals can be realized through one cable between the combining device and the splitting device in the whole process, and the construction wiring cost is reduced.

In addition, the transmission of the analog video signals in the whole monitoring system can be realized through the cable in the whole process, so that the real-time performance of video transmission is better.

Drawings

FIG. 1 is a schematic diagram of signal transmission in a first wiring manner in a conventional analog monitoring system;

FIG. 2 is a schematic diagram of signal transmission in a second wiring manner in a conventional analog monitoring system;

fig. 3 is a schematic diagram of signal transmission in a wiring manner corresponding to an analog video signal processing method according to an embodiment of the present invention;

fig. 4 is a flowchart of an analog video processing method according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of an analog video signal acquired by any image capturing device in an analog video processing method according to an embodiment of the present invention;

fig. 6 is a flowchart illustrating a method of step S102 in an analog video processing method according to an embodiment of the present invention;

fig. 7 is a flowchart illustrating a method of step S201 in an analog video processing method according to an embodiment of the present invention;

fig. 8 is a schematic diagram of a signal transmission process between the analog camera 1 and the analog camera 2 and the combining device in an analog video processing method according to an embodiment of the present invention;

fig. 9 is a flowchart illustrating a method of step S202 in an analog video processing method according to an embodiment of the present invention;

FIG. 10 is a timing diagram of the signals of FIG. 8;

fig. 11 is a schematic diagram of a combination device in an analog video processing method according to an embodiment of the present invention;

fig. 12 is a flowchart of an analog video processing method according to an embodiment of the present invention;

fig. 13 is a flowchart illustrating a method of step S502 in an analog video processing method according to an embodiment of the present invention;

FIG. 14 is a schematic diagram of one of the branches for the single-channel analog video signal shown in FIG. 11;

fig. 15 is a schematic diagram of a transmission process in a splitter device electrically connected to the combiner device shown in fig. 8 in an analog video processing method according to an embodiment of the present invention;

FIG. 16 is a timing diagram of the signals of FIG. 15;

fig. 17 is a block diagram of an analog processing video processing system according to an embodiment of the present invention;

fig. 18 is a schematic structural diagram of a combining device according to an embodiment of the present invention;

fig. 19 is a schematic structural diagram of a combining device according to an embodiment of the present invention;

fig. 20 is a schematic structural diagram of a shunt device according to an embodiment of the present invention;

fig. 21 is a schematic structural diagram of a shunt device according to an embodiment of the present invention;

fig. 22 is a block diagram of an analog video processing apparatus according to an embodiment of the present invention;

fig. 23 is a block diagram of an analog video processing apparatus according to an embodiment of the present invention.

Detailed Description

The terms "first," "second," and the like in the description and claims of the present invention and in the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "comprises" and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

In order to better understand the technical solutions of the present invention, the technical solutions of the present invention are described in detail below with reference to the drawings and the specific embodiments, and it should be understood that the specific features in the embodiments and the embodiments of the present invention are detailed descriptions of the technical solutions of the present invention, and are not limitations of the technical solutions of the present invention, and the technical features in the embodiments and the embodiments of the present invention may be combined with each other without conflict.

At present, the following two wiring methods are commonly adopted in the existing analog monitoring system. Specifically, taking an analog monitoring system comprising an analog camera 1 and an analog camera 2 as an example, as shown in fig. 1, a schematic diagram of signal transmission in a first wiring manner is shown, specifically, the analog camera 1 is electrically connected with a DVR through a coaxial line 1, the analog camera 2 is electrically connected with the DVR through a coaxial line 2, wherein an analog video signal 1-1 from the analog camera 1 is transmitted to the DVR through the coaxial line 1, an analog video signal 2-1 from the analog camera 2 is transmitted to the DVR through the coaxial line 2, and the DVR decodes a corresponding analog video signal and then transmits the analog video signal to a display for display. In the whole process, once the buried individual coaxial line is damaged, the whole coaxial line needs to be replaced again, and the construction and wiring cost is high.

Still taking a binocular analog monitoring system comprising an analog camera 1 and an analog camera 2 as an example, as shown in fig. 2, a schematic diagram of signal transmission under a second wiring mode is shown, specifically, the analog camera 1 transmits an analog video signal 1 to a transmitting end of an optical transceiver through a coaxial line 1, the analog camera 2 transmits the analog video signal 2 to the transmitting end of the optical transceiver through the coaxial line 2, the transmitting end of the optical transceiver converts two received analog video signals into digital coding signals through analog-to-digital conversion, then electro-optically converts the digital coding signals into optical signals, then transmits the optical signals to a receiving end of the optical transceiver through an optical fiber, then the receiving end of the optical transceiver photoelectrically converts the optical signals carrying video information into digital signals, and performs digital-to-analog conversion on the digital signals into two analog video signals (including an analog video signal 3 and an analog video signal 4), then the analog video signal 3 is transmitted to a DVR through a coaxial line 3, the analog video signal 4 is transmitted to the DVR through the coaxial line 4, and then the DVR decodes the corresponding analog video signal and transmits the decoded analog video signal to the display, and the decoded analog video signal is displayed by the display. In the process of transmitting the analog video signal by the wiring method, on one hand, the cost of the optical transceiver (including the optical transceiver transmitting end and the optical transceiver receiving end) is high, and on the other hand, the analog video signal needs to be subjected to digital-to-analog conversion, encoding, modulation, resolution compression and other processing, and the whole process can affect the real-time performance of the video. In addition, for resolution compression, for example, compressing the resolution 100 ten thousand to 20 ten thousand, the sharpness and contrast of the picture are degraded, thereby affecting the picture quality.

In view of this, the invention provides an analog video processing method, system and device, which are used for reducing the construction and wiring cost of an analog monitoring system and improving the real-time performance of video monitoring.

Still taking an analog monitoring system including an analog camera 1 and an analog camera 2 as an example, as shown in fig. 3, a schematic diagram of signal transmission in a wiring manner corresponding to a method for processing an analog video signal provided by an embodiment of the present invention is shown, specifically, an analog video signal 1 from the analog camera 1 is transmitted to an analog signal combiner through a coaxial line 1, and an analog video signal 2 from the analog camera 2 is transmitted to an analog signal combiner through a coaxial line 2, that is, analog video signals of the analog camera 1 and the analog camera 2 are transmitted to the analog signal combiner through respective coaxial lines. Then analog video signal 1 and analog video signal 2 are synthesized into one path of analog video signal (namely analog video signal 3) in the analog signal combiner, then the analog signal combiner transmits the analog video signal 3 to the analog signal branching unit through the coaxial line 3, then the analog signal branching unit divides one path of analog video signal 3 into two paths of analog video signal 4 and analog video signal 5, the analog video signal 4 and the analog video signal 5 are transmitted to the DVR through the coaxial line 4 and the coaxial line 5 respectively, and then the DVR decodes the corresponding analog video signal and transmits the analog video signal to the display. In the whole signal transmission process, the analog video combiner and the analog signal splitter are used for processing the analog video signals, and the analog video combiner and the analog signal splitter can transmit signals only through a universal coaxial line, so that the construction wiring cost is reduced. In addition, digital-to-analog conversion, video stream coding and decoding, video compression and other processing are not needed in the whole process, signal transmission is directly carried out through the coaxial line, and the real-time performance of video transmission is good. In practical applications, the number of the analog cameras may be more than two, and accordingly, the number of the analog video signals transmitted to the analog signal combiner may be more than two, which is not limited herein.

Referring to fig. 4, an embodiment of the present invention provides a method for processing an analog video by a combining device, which specifically includes:

s101: the method comprises the steps that a combiner device obtains N paths of analog video signals to be combined, wherein the N paths of analog video signals are analog video signals sent by N camera devices electrically connected with the combiner device, each camera device in the N camera devices outputs one path of analog video signal, the frame rate of each path of analog video signal in the N paths of analog video signals is M frames per second, N is an integer greater than 1, and M is a number greater than 1;

in a specific implementation process, after the N image capturing devices capture analog video signals, the analog video signals may be transmitted to the combining device through a cable, where one of the structural diagrams of the analog video signals captured by any one of the image capturing devices is shown in fig. 5, specifically, taking a frame rate as M frames/second as an example, within 1 second, the analog video signals include M frames of images, each frame of image includes a frame synchronization and a valid image for representing the content of the frame of image (as shown by a dashed box in the figure), only nth frame to N +8 th frame of the M frames of images in the analog video signal are shown in fig. 5, and other frames are not limited herein, where N is a positive integer. The combining device may be the analog signal combiner in fig. 3, and the image capturing device may be an analog camera, or some other video signal collecting device. The cable may be a coaxial cable or some other transmission medium commonly used in the analog video field, such as 75-3, 75-5, RG59, etc. The type of the image pickup apparatus, and the type of the cable are not limited herein.

In a specific implementation process, frame rates of the analog video signals of the N paths of analog video signals to be synthesized, which are acquired by the combining device, are all M frames/second, so that the combining device can synthesize the acquired analog video signals of the N paths of analog video signals to be synthesized. For example, the frame rate of the N analog video signals to be synthesized is 50 frames/second, but other frame rates are also possible, which is not limited herein.

S102: the combining equipment is used for synthesizing the N paths of analog video signals to obtain a synthesized single path of analog video signal;

in a specific implementation process, the synthesized single-channel analog video signal is one channel of analog video signal, specifically, after receiving N channels of analog video signals, the combining device may synthesize the N channels of analog video signals, and further synthesize the N channels of analog video signals into one channel of analog video signal, for example, may synthesize three channels of analog video signals into one channel of analog video signal.

S103: and the combining equipment sends the single-path analog video signal to the splitting equipment so that the splitting equipment obtains the N-path analog video signals according to the single-path analog video signal, wherein data transmission is carried out between the combining equipment and the splitting equipment through a cable.

In a specific implementation process, the combining device sends the combined single-path analog video signal to the splitting device through the cable, so that the splitting device obtains N paths of analog video signals before combining according to the single-path analog video signal. Due to the whole process, no matter how many N camera devices are, the transmission of the analog video signal can be realized through one cable between the combining device and the branching device, so that the construction wiring cost is reduced. In addition, the transmission of the analog video signals in the whole monitoring system can be realized through the cable in the whole process, so that the real-time performance of video transmission is better.

In the embodiment of the present invention, as shown in fig. 6, step S102: the combining device synthesizes the N analog video signals to obtain a synthesized one-way analog video signal, including:

s201: the combining device adjusts the N paths of analog video signals to the same phase to obtain the adjusted N paths of analog video signals;

s202: and the combiner equipment combines the adjusted N paths of analog video signals to obtain a combined single path of analog video signal.

In the specific implementation process, the specific implementation process from step S201 to step S202 is as follows:

the method comprises the steps that as the phases of N paths of analog video signals to be synthesized are possibly different, the phases of the N paths of analog video signals to be synthesized are detected through a combining device, if the phases of the analog video signals are not the same, the combining device adjusts the N paths of analog video signals to be synthesized to the same phase, and the adjusted N paths of analog video signals are obtained; because the phases of the N paths of adjusted analog video signals are the same, the synthesis difficulty of the analog video signals is simplified, and the synthesis efficiency of the analog video signals is improved. And then synthesizing the adjusted N paths of analog video signals to obtain a synthesized single path of analog video signal. Therefore, the quality of the obtained single-channel analog video signal is better.

In the embodiment of the present invention, as shown in fig. 7, step S201: the combining device adjusts the N analog video signals to the same phase to obtain the adjusted N analog video signals, including:

s301: the combining equipment takes any one of the N paths of analog video signals as a phase reference signal;

s302: the combining equipment determines the phase relation between the (N-1) paths of analog video signals except the phase reference signal and the phase reference signal in the N paths of analog video signals;

s303: and the combiner equipment adjusts the (N-1) paths of analog video signals to be in the same phase with the phase of the phase reference signal according to the phase relation, and obtains the adjusted N paths of analog video signals.

In the specific implementation process, the specific implementation process of steps S301 to S303 is as follows:

first, the combining device uses any one of the N analog video signals to be combined as a phase reference signal, and takes the analog video signal 1 as the phase reference signal in the signal transmission process between the analog camera 1 and the combining device and the analog camera 2 shown in fig. 3 as an example. Then, the phase relationship between the (N-1) analog video signals, except for the phase reference signal, of the N analog video signals to be combined and the phase reference signal is determined, for example, the phase relationship between the analog video signal 2 and the analog video signal 1 is determined. Then, the combining device adjusts the (N-1) channels of analog video signals to be in the same phase as the phase of the phase reference signal according to the phase relationship between the (N-1) channels of analog video signals and the phase reference signal, thereby obtaining the adjusted N channels of analog video signals, for example, adjusts the phase of the analog video signal 2 to be in the same phase as the phase of the analog video signal 1.

In the embodiment of the present invention, one path of analog video signals received by the combining device and sent by a single image pickup device may be fanned out into multiple paths, for example, an impedance transformation unit with large input impedance and small output impedance may be arranged in the combining device, so that the analog video signals output by the impedance transformation unit do not interfere with the analog video signals sent by the image pickup device, thereby improving the transmission quality of the combining device on the analog video signals, and further improving the quality of video monitoring.

In a specific implementation process, as shown in fig. 8, the combining device includes an impedance conversion unit 1, an impedance conversion unit 2, a phase detection unit, a phase modulation unit, a control unit, and a switch unit, specifically, the impedance conversion unit 1 copies an analog video signal 1-1 output by the analog camera 1 into three paths of analog video signals 1-2, analog video signals 1-3, and analog video signals 1-4 that are completely the same as the analog video signal 1-1, where the analog video signals 1-2 are directly input to the switch unit electrically connected to the impedance conversion unit 1, the analog video signals 1-3 are directly input to the phase detection unit electrically connected to the impedance conversion unit 1, and the analog video signals 1-4 are directly input to the control unit electrically connected to the impedance conversion unit 1. The analog video signal 2-1 output by the analog camera 2 is copied into two paths of analog video signals 2-2 and analog video signals 2-3 which are completely the same as the analog video signal 2-1 through the impedance conversion unit 2, wherein the analog video signal 2-2 is directly input to a phase discrimination unit electrically connected with the impedance conversion unit 2, and the analog video signal 2-3 is directly input to a control unit electrically connected with the impedance conversion unit. Analog video signals 1-3 can be used as phase reference signals, the phase relationship between two paths of analog video signals from an analog camera 1 and an analog camera 2 can be determined through a phase demodulation unit which is respectively electrically connected with an impedance conversion unit 1 and an impedance conversion unit 2, the phase relationship between the analog video signals 2-2 and the analog video signals 1-3 can be determined, if the phase of the analog video signals 2-2 is not the same as the phase of the analog video signals 1-3, the phase of the analog video signals 2-2 can be adjusted to be consistent with the phase of the analog video signals 1-3 through a phase demodulation unit which is electrically connected with the phase demodulation unit, and the analog video signals 2-4 are output to a switch unit which is electrically connected with the impedance conversion unit 1 through the phase demodulation unit. The switch unit controls the selective output of each path of analog video signals after receiving the analog video signals 1-2 from the impedance conversion unit 1 and the analog video signals 2-4 output by the phase modulation unit.

In addition, in the specific implementation process, the detection unit detects whether the analog video signals from the camera devices meet the combination requirement according to the received analog video signals 1-4 and the analog video signals 2-3, and only when the combination requirement is met, the detection unit outputs a control signal to the switch unit, so that the synthesis of multiple paths of analog video signals is realized. For example, the frame rates of the analog video signals are the same, and the output of the synthesized one-way analog video signal is realized by the switching unit. Still taking the signal transmission process between the analog camera 1 and the analog camera 2 shown in fig. 8 and the combining device as an example, after the switch unit outputs the synthesized one-way analog video signal, the one-way analog video signal is filtered, for example, the one-way analog video signal is filtered by the filtering unit, so as to filter the noise generated in the combining process, specifically, the one-way analog video signal can be filtered by the filtering unit electrically connected to the switch unit, so that the synthesizing quality of the multiple-way analog video signals is improved, and the quality of video monitoring is improved.

In the embodiment of the present invention, as shown in fig. 9, step S202: the combining device combines the adjusted N analog video signals to obtain a combined single analog video signal, including:

s401: the combining equipment sequentially extracts image frames to be combined from each analog video signal of the adjusted N analog video signals according to a frame period of 1/M second;

s402: and the combining equipment combines the image frames to be combined together at the moment of non-effective images to obtain a combined single-path analog video signal, wherein the (Nn + (k-1)) th frame in the single-path analog video signal is the picture of the k-th path analog video signal in the N paths of adjusted analog video signals, k is an integer which is more than 1 and not more than N, and N is any integer.

In the specific implementation process, the specific implementation process from step S401 to step S402 is as follows:

first, the combining device sequentially extracts image frames to be combined from each of the N adjusted analog video signals according to a frame period of 1/M second, and still taking the signal transmission process shown in fig. 8 as an example, when the frame rate is 50 frames/second and the resolution is 720P, one frame period is 0.02 second, which may be an odd-numbered frame image frame selected from the analog video signals 1-1 according to the frame period of 0.02 second, for example, an nth frame image frame, an N +2 th frame image frame, an N +4 th frame image frame, an N +6 th frame image frame, and an N +8 th frame image frame. And simultaneously selecting even frame image frames from the analog video signals 2-4 according to the frame period of 0.02 second, such as the (n +1) th image frame, the (n +3) th image frame, the (n +5) th image frame and the (n + 7) th image frame. Then, the combining device combines the image frames to be combined together at the moment of the ineffective image to obtain a combined single-channel analog video signal. In a specific implementation process, the (Nn + (k-1)) th frame in the single-path analog video signal is a picture of the k-path analog video signal in the N-path analog video signals after adjustment, k is an integer greater than 1 and not greater than N, and N is any integer. For example, the odd frame image frames selected from the analog video signals 1-1 may be combined with the even frame image frames selected from the analog video signals 2-4, specifically, at the time of the non-effective image, the analog video signals to be combined are sequentially selected according to the frame period of 1/M seconds, and the frame intervals of the multiple analog video signals are superimposed into N-in-one single-channel analog video signals. Fig. 10 is a timing diagram of the signals in fig. 8.

In the embodiment of the present invention, if the one-way analog video signal synthesized by the combining device is synthesized by two analog video signals including the adjusted first-way analog video signal and the adjusted second-way analog video signal, that is, when N is 2, a 2 nth frame of the one-way analog video signal is a picture of the first-way analog video signal, and a (2N +1) th frame of the one-way analog video signal is a picture of the second-way analog video signal, where N is any integer. Taking two analog video signals with a resolution of 100 ten thousand and a frame rate of 50 frames/second as an example, a schematic diagram of combining by a combining device within 1 second is shown in fig. 11, specifically, before combining, within 1 second, 1 channel includes 50 frames of pictures in the first analog video signal. The single-channel analog video signal finally obtained by the combining device includes 25 frames of the picture of the first channel of analog video signal and 25 frames of the picture of the second channel of analog video signal within 1 second, and the single-channel analog video signal still has a resolution of 100 ten thousand. At any one time, the image frames of the two channels of the single analog video signal are spaced apart. For example, at a certain time, a first frame of the single-channel analog video signal is a picture of the first channel of analog video signal, a second frame thereof is a picture of the second channel of analog video signal, a third frame thereof is a picture of the first channel of analog video signal, and a fourth frame thereof is a picture of the second channel of analog video signal, and so on, and thus description is omitted.

In this embodiment of the present invention, if the single-channel analog video signal synthesized by the combining device is synthesized from three channels of analog video signals including the adjusted first channel of analog video signal, the adjusted second channel of analog video signal, and the adjusted third channel of analog video signal, that is, when N is 3, the 3 nth frame of the single-channel analog video signal is a picture of the first channel of analog video signal, the (3N +1) th frame of the single-channel analog video signal is a picture of the second channel of analog video signal, and the (3N +2) th frame of the single-channel analog video signal is a picture of the third channel of analog video signal.

For another example, if the single-channel analog video signal synthesized by the combining device is synthesized from four channels of analog video signals including the adjusted first channel of analog video signal, the adjusted second channel of analog video signal, the adjusted third channel of analog video signal, and the adjusted fourth channel of analog video signal, that is, when N is 4, the 4 nth frame of the single-channel analog video signal is a picture of the first channel of analog video signal, the (4N +1) th frame of the single-channel analog video signal is a picture of the second channel of analog video signal, the (4N +2) th frame of the single-channel analog video signal is a picture of the third channel of analog video signal, and the (4N +3) th frame of the single-channel analog video signal is a picture of the fourth channel of analog video signal. When the combining device combines the i-channel analog video signals, namely N is i, the (in + (k-1)) th frame of the single-channel analog video signal is a picture of the k-channel analog video signal. Of course, those skilled in the art may synthesize the corresponding multiple analog video signals by the combining device according to the actual application requirement, which is not limited herein.

In the embodiment of the present invention, in step S102: the combining device synthesizes the N analog video signals to obtain a synthesized single analog video signal, and the method further includes: and the combiner equipment carries out filtering processing on the single-path analog video signal to obtain a filtered single-path analog video signal. Still taking the signal transmission process shown in fig. 8 as an example, in the whole process, when each path of analog video signal is selected by the switch unit, noise is easily generated, and the synthesized one-path analog video signal is filtered by the combining device, so that the synthesis quality of the analog video signal is improved, and the quality of video monitoring is further improved.

Based on the same inventive concept, as shown in fig. 12, an embodiment of the present invention further provides an analog video processing method, where the method includes:

s501: the method comprises the steps that a shunting device receives a single-path analog video signal sent by a combining device, wherein the single-path analog video signal is obtained after the combining device synthesizes N paths of analog video signals, data transmission is carried out between the combining device and the shunting device through a cable, the N paths of analog video signals are analog video signals sent by N image pickup devices electrically connected with the combining device, each image pickup device in the N image pickup devices outputs one path of analog video signal, the frame rate of each path of analog video signal in the N paths of analog video signals is M frames/second, N is an integer larger than 1, and M is a number larger than 1;

in a specific implementation, the splitting device may be an analog signal splitter as shown in fig. 3. Specifically, after obtaining the combined single-channel analog video signal, the combining device transmits the single-channel analog video signal to the splitting device through the cable, and then the splitting device splits the single-channel analog video signal to recover the original N channels of analog video information. Because the analog video signals can be transmitted between the combining equipment and the splitting equipment through universal transmission media such as cables, the construction wiring cost can be effectively reduced. In addition, because the cost of the universal transmission media such as the cables is low, when wiring is carried out, a plurality of cables can be buried between the combining equipment and the splitting equipment, and only one cable is used when the video signals are actually transmitted, so that when one cable is damaged, the buried cable is not required to be updated, only other spare cables are required to be used, the maintenance frequency can be effectively reduced, and the maintenance cost is reduced.

S502: and the shunting equipment carries out shunting processing on the single-path analog video signal to obtain N paths of analog video signals after shunting.

In the specific implementation process, after the branching device receives the single-path analog video signal synthesized by the N-path analog video signals transmitted by the combining device through the cable and other general transmission media, the single-path video signal can be decomposed into the N-path analog video signals through the branching device, so that the lossless transmission of the analog video signals is realized, and the quality of video monitoring is improved.

In the embodiment of the present invention, as shown in fig. 13, step S502: the said shunting equipment carries on the shunting to the said single-channel analog video signal, obtain N analog video signal after shunting, including:

s601: the shunting equipment disperses the single-path analog video signal into N paths of video signals, each path of video signal in the N paths of video signals lags behind one frame period path by path, and the difference between the first path of video signal and the N path of video signal in the N paths of video signals is (N-1) frame periods;

s602: and the shunting equipment obtains N paths of analog video signals after shunting according to the N paths of video signals.

In the specific implementation process, the specific implementation process of step S601 to step S602 is as follows:

firstly, the splitting device splits N paths of video signals from the single path analog video signal received from the combining device, where two adjacent paths of the N paths of video signals differ by one frame period, for example, when M is 50, the corresponding frame rate is 50 frames/second, and one frame period is 0.02 second, two adjacent paths of the N paths of video signals differ by 0.02 second, the N paths of single path analog video signals may be scattered into N paths of analog video signals, and each scattered path of video signals lags behind (or leads) the N paths of analog video signals path by 0.02 second, so that the first path of video signals and the N path of video signals scattered differ by (N-1)/50 seconds, and accordingly, the phase difference between the two paths of video signals is (N-1) frame periods. Then, the branching device obtains N branched analog video signals according to the N video signals, for example, a frame may be respectively selected from the N video signals as any branched video signal by branching. Therefore, the splitting of the single-path analog video signal by the branching device is realized, the video transmission quality is improved, and the video monitoring quality is ensured.

In this embodiment of the present invention, if the N analog video signals split by the splitting device include a first split video signal and a second split video signal, that is, N is 2, then the 2N frame and the (2N +1) frame of the first split video signal are the 2N frame of the single analog video signal, and the (2N +1) frame and the (2N +2) frame of the second split video signal are the (2N +1) frame of the single analog video signal. That is, the 2 n-th frame of the one-way analog video signal is taken as the 2 n-th frame and the (2n +1) -th frame of the first divided video signal, and the (2n +1) -th frame of the one-way analog video signal is taken as the (2n +1) -th frame and the (2n +2) -th frame of the second divided video signal. In conjunction with the combined one-way analog video signal shown in fig. 11, as shown in fig. 14, a splitting schematic diagram of a splitting device for the one-way analog video signal shown in fig. 11 is shown, specifically, the one-way analog video signal includes 25 frames of pictures of a first-way analog video signal and 25 frames of pictures of a second-way analog video signal within 1 second, and at any one time, the image frames of two channels of the one-way analog video signal are arranged at intervals. The single-path analog video signal input into the branching device by the combining device is transmitted by combining the image frames of two channels. In other words, the one-way analog video signal input to the branching device includes 1-channel picture information with a resolution of 100 ten thousand, 25 frames/second, and 2-channel picture information of 25 frames/second. In the 50 frames of images output by the branching device within 1 second, the 1 st frame and the 2 nd frame are the same picture, the 3 rd frame and the 4 th frame are the same picture, the 5 th frame and the 6 th frame are the same picture, and so on, and detailed description is omitted.

In this embodiment of the present invention, if the N analog video signals split by the splitting device include a first split video signal, a second split video signal, and a third split video signal, that is, N is 3, then the 3 nth frame, the (3N +1) th frame, and the (3N +2) th frame of the first split video signal are the 3 nth frame of the one-way analog video signal, the (3N +1) th frame, the (3N +2) th frame, and the (3N +3) th frame of the second split video signal are the (3N +1) th frame of the one-way analog video signal, and the (3N +2) th frame, the (3N +3) th frame, and the (3N +4) th frame of the third split video signal are the (3N +2) th frame of the one-way analog video signal. That is, the 3 nth frame, the (3n +1) th frame, and the (3n +2) th frame of the one-way analog video signal are taken as the 3 nth frame, the (3n +1) th frame, the (3n +2) th frame, and the (3n +3) th frame of the one-way analog video signal are taken as the (3n +1) th frame, the (3n +2) th frame, and the (3n +4) th frame of the second-way analog video signal are taken as the (3n +2) th frame, the (3n +3) th frame, and the (3n +4) th frame of the one-way analog video signal.

In the embodiment of the present invention, if the N analog video signals split by the splitting apparatus include a first split video signal, a second split video signal, a third split video signal and a fourth split video signal, that is, N is 4, then the 4N frame, the (4N +1) th frame, the (4N +2) th frame and the (4N +3) th frame of the first split video signal are the 4N frame of the one-way analog video signal, the (4N +1) th frame, the (4N +2) th frame, the (4N +3) th frame and the (4N +4) th frame of the second split video signal are the (4N +1) th frame of the one-way analog video signal, the (4N +2) th frame, the (4N +3) th frame, the (4N +4) th frame and the (4N +5) th frame of the third split video signal are the (4N +2) th frame of the one-way analog video signal, the (4n +3) th frame, the (4n +4) th frame, the (4n +5) th frame, and the (4n +6) th frame of the fourth divided video signal are the (4n +3) th frame of the one-way analog video signal. That is, the 4n th frame of the one-way analog video signal is taken as the 4n th frame, the (4n +1) th frame, the (4n +2) th frame and the (4n +3) th frame of the first divided video signal, the (4n +1) th frame of the one-way analog video signal is taken as the (4n +1) th frame, the (4n +2) th frame, the (4n +3) th frame and the (4n +4) th frame of the second divided video signal, the (4n +2) th frame of the one-way analog video signal is taken as the (4n +2) th frame, the (4n +3) th frame, the (4n +4) th frame and the (4n +5) th frame of the second divided video signal, the (4n +3) th frame of the one-way analog video signal is taken as the (4n +3) th frame, the (4n +4) th frame, the (4n +5) th frame and the (4n +6) th frame of the second-way analog video signal.

In the embodiment of the present invention, when the branching device branches the one-way analog video signal composed of the j-way analog video signal, that is, when N is j, the (jn + (m-1)) th frame of the one-way analog video signal is taken as the (jn + (m-1)) th frame, the (jn + m) th frame, … …, the (jn + (j + m-2)) th frame of the mth branch. Of course, those skilled in the art can split the corresponding multiple analog video signals by the splitting device according to the actual application requirement, and the splitting device is not limited herein.

In the embodiment of the present invention, as shown in fig. 15, it is a schematic diagram of a transmission process of a single-channel analog video signal in a splitter device electrically connected to the combiner device shown in fig. 8, the splitter device includes an impedance transformation unit 3, a phase modulation unit, a control unit, a switch unit 1 and a switch unit 2, specifically, the single-channel analog video signal output by the combiner device shown in fig. 8 is an analog video signal 3-1, the single-channel analog video signal is copied into three channels of an analog video signal 3-2, an analog video signal 3-3 and an analog video signal 3-4 which are identical to the analog video signal 3-1 by the impedance transformation unit 3, the analog video signal 3-2 is used as a phase reference phase and is input to the switch unit 1 electrically connected to the impedance transformation unit 3, the analog video signal 3-3 is input to the phase modulation unit electrically connected to the impedance transformation unit 3, the phase modulation unit adjusts the analog video signal 3-3 to have a difference of one frame period with the analog video signal 3-2, the phase modulation unit outputs the analog video signal 3-5, and the analog video signal 3-5 is input to the switch unit 1 electrically connected with the phase modulation unit. And inputs the analog video signal 3-2 and the analog video signal 3-5 to the switching unit 2 electrically connected to the impedance converting unit 3 and the phase modulating unit, respectively. The analog video signals 3-4 are input to a control unit electrically connected with the impedance conversion unit 3, and the control unit outputs a control signal 1, a control signal 2 and a control signal 3, wherein the control signal 1 is input to a phase modulation unit electrically connected with the control unit, so that the phase modulation unit is controlled to adjust the phase of the analog video signals 3-3 to be different from the phase of the analog video signals 3-2 by one frame period. The control signal 2 is input to the switching unit 1 electrically connected to the control unit, thereby controlling the switching unit 1 to select the corresponding image frame to generate the first shunt output. The control signal 3 is input to the switching unit 2 electrically connected to the control unit, thereby controlling the switching unit 2 to select the corresponding image frame to generate the second shunt output. In order to improve the splitting capability of the splitting device for a single-channel analog video signal, as shown in fig. 15, the splitting device may further include a filtering unit 1 electrically connected to the switch unit 1, and the filtering unit 1 performs denoising processing on the first channel analog video signal output by the first splitting. The shunt equipment can also comprise a filtering unit 2 electrically connected with the switch unit 2, and the filtering unit 2 is used for denoising the second path of analog video signals output by the second shunt, so that the quality of each path of analog video signals split by the shunt equipment is ensured, and the quality of video monitoring is improved. Fig. 16 is a timing diagram of the signals in fig. 15.

Based on the same inventive concept, as shown in fig. 17, an embodiment of the present invention provides an analog processing video processing system, including: the system comprises a combining device 10 and a splitting device 20 which performs data transmission with the combining device 10 through a cable 11; wherein:

the combining device 10 is configured to obtain N analog video signals to be combined, combine the N analog video signals to obtain a combined single-channel analog video signal, and send the single-channel analog video signal to the splitting device 20, where the N analog video signals are analog video signals sent by N image capturing devices electrically connected to the combining device 10, each image capturing device of the N image capturing devices outputs one channel of analog video signal, a frame rate of each analog video signal of the N analog video signals is M frames/second, N is an integer greater than 1, and M is a number greater than 1;

and the splitting device 20 is configured to receive the single-channel analog video signal sent by the combining device 10, and perform splitting processing on the single-channel analog video signal to obtain N split channels of analog video signals.

The combining device 10 may be an analog signal combiner shown in fig. 3, or may be a combining device shown in fig. 8, and the combining device 10 may perform the method of analog video processing shown in fig. 4; the splitting device 20 may be an analog signal splitter as shown in fig. 3, or may be a splitting device as shown in fig. 15, and the splitting device 20 may perform the analog video processing method as shown in fig. 12. For specific implementation of the combining device 10 and the splitting device 20, reference may be made to the description of the foregoing corresponding embodiments, and details are not described here again.

In the embodiment of the invention, the combining device 10 in the analog video processing system can combine the received multiple paths of analog video signals to be combined into a single path of analog video signal, then the single path of analog video signal is transmitted to the branching device through a universal cable, the branching device branches the single path of analog video signal into multiple paths of analog video signals, and the combined single path of analog video signal is transmitted between the combining device and the branching device through the universal cable, so that the transmission efficiency of the analog video signals is improved, the construction wiring cost is reduced, and the method has considerable economic benefit.

Based on the same inventive concept, as shown in fig. 18 and 19, an embodiment of the present invention further provides a combining device 10, specifically, the combining device 10 includes: the system comprises N impedance conversion units 30 electrically connected with N camera devices, wherein the N impedance conversion units 30 are used for receiving N paths of analog video signals to be synthesized, which are sent by the N camera devices, each camera device in the N camera devices is electrically connected with one impedance conversion unit 30, each camera device in the N camera devices outputs one path of analog video signal, the frame rate of each path of analog video signal in the N paths of analog video signals is M frames per second, N is an integer greater than 1, and M is a number greater than 1;

a combining processing unit 40 electrically connected to the N impedance transforming units 30, wherein the combining processing unit 40 is configured to receive the N analog video signals and perform combining processing on the N analog video signals to obtain a combined single analog video signal;

and a sending unit 50 electrically connected to the combining processing unit 40, wherein the sending unit 50 is configured to receive the one-way analog video signal and send the one-way analog video signal to the splitting device 20 electrically connected to the sending unit 50, so that the splitting device 20 obtains the N-way analog video signal according to the one-way analog video.

In the implementation, fig. 18 shows a case where N is 2, and specifically, the analog video signals are acquired by the analog camera 1 and the analog camera 2. The specific setting principle of N being 2 for the case where N is other positive integers is not described in detail herein.

In the embodiment of the present invention, the combining processing unit 40 includes a phase processing unit 60 and a combining unit 70 electrically connected to the phase processing unit 60, wherein:

the phase processing unit 60 is configured to adjust the received N channels of analog video signals to the same phase, obtain N channels of adjusted analog video signals, and send the N channels of adjusted analog video signals to the synthesizing unit 70;

the synthesizing unit 70 synthesizes the adjusted N analog video signals to obtain a synthesized one-way analog video signal.

In this embodiment of the present invention, the phase processing unit 60 includes a phase detection unit 601 and a phase modulation unit 602 electrically connected to the phase detection unit 601, where:

the phase discrimination unit 601 is configured to use any one of the N paths of analog video signals as a phase reference signal, and determine a phase relationship between (N-1) paths of analog video signals, except the phase reference signal, of the N paths of analog video signals and the phase reference signal;

the phase modulation unit 602 is configured to adjust the phase of the (N-1) channels of analog video signals to be the same as the phase of the phase reference signal according to the phase relationship, and obtain N channels of adjusted analog video signals.

In the embodiment of the present invention, the synthesizing unit 70 includes a control unit 701 and a switch unit 702 electrically connected to the control unit 701, wherein:

the control unit 701 is configured to send a control signal to the switch unit 702 when detecting that the adjusted N analog video signals satisfy the combining condition;

the switch unit 702 is configured to receive and respond to the control signal, and sequentially extract an image frame to be synthesized from each of the N adjusted analog video signals according to a frame period of 1/M second; the switching unit 702 combines the image frames to be combined together at the time of the ineffective image to obtain a combined single-channel analog video signal, wherein the (Nn + (k-1)) th frame in the single-channel analog video signal is the picture of the k-th channel analog video signal in the adjusted N channels of analog video signals, k is an integer greater than 1 and not greater than N, and N is any integer.

In this embodiment of the present invention, the sending unit 50 includes a filtering unit 501 electrically connected to the switching unit 702, and the filtering unit 501 is configured to perform filtering processing on the single-channel analog video signal to obtain a filtered single-channel analog video signal.

The relevant components in the combining device 10 shown in fig. 19 have already been described in detail in the foregoing description related to fig. 8, and are not repeated here.

Based on the same inventive concept, as shown in fig. 20 and 21, an embodiment of the present invention provides a bifurcating device 20, specifically, the bifurcating device 20 includes:

the impedance conversion unit 30 is electrically connected to the combining device 10, and the impedance conversion unit 30 is configured to receive a single-channel analog video signal sent by the combining device 10, where the single-channel analog video signal is obtained by combining N channels of analog video signals by the combining device 10, where the N channels of analog video signals are analog video signals sent by N image capturing devices electrically connected to the combining device 10, each image capturing device of the N image capturing devices outputs one channel of analog video signal, a frame rate of each channel of analog video signal in the N channels of analog video signals is M frames/second, N is an integer greater than 1, and M is a number greater than 1;

and a branching processing unit 80 electrically connected to the impedance transformation unit 30, configured to perform branching processing on the single-channel analog video signal, so as to obtain N branched analog video signals.

In the implementation, fig. 20 shows a case where N is 2, and specifically, the analog video signals are acquired by the analog camera 1 and the analog camera 2. The specific setting principle of N being 2 for the case where N is other positive integers is not described in detail herein.

In the embodiment of the present invention, the shunt processing unit 80 includes a phase modulation unit 602 electrically connected to the impedance transformation unit 30, wherein:

the impedance transformation unit 30 is configured to radiate the single-channel analog video signal into N channels of video signals;

the phase modulation unit 602 is configured to lag each of the N paths of video signals by one frame period, and send the N paths of split analog video signals, where a difference between a first path of video signal and an N th path of video signal in the N paths of video signals is (N-1) frame periods.

In this embodiment of the present invention, the shunting processing unit 80 further includes a control unit electrically connected to the impedance transforming unit 30 and the phase modulating unit 602, respectively, and N switching units 702 electrically connected to the control unit 701, where the N switching units 702 are electrically connected to the impedance transforming unit 30, where:

the control unit 701 is configured to control the phase modulation unit 602 to perform phase adjustment on each of the N paths of video signals, and control the N switch units 702 to output the branched N paths of analog video signals. In a specific implementation process, the splitter device may further include N filtering units 50 electrically connected to the N switching units 702, and the filtering units 50 perform denoising processing on the analog video signals of the corresponding splitter, so as to ensure the quality of each analog video signal split by the splitter device 20, and further improve the quality of video monitoring.

The relevant components of bifurcating device 20 shown in fig. 21 have already been described in detail in the foregoing description related to fig. 15, and are not repeated here.

Based on the same inventive concept, as shown in fig. 22, an embodiment of the present invention provides an analog video processing apparatus, including:

an obtaining module 100, configured to obtain N analog video signals to be synthesized, where the N analog video signals are analog video signals sent by N image capturing devices electrically connected to the combining device, each image capturing device of the N image capturing devices outputs one analog video signal, a frame rate of each analog video signal of the N analog video signals is M frames/second, N is an integer greater than 1, and M is a number greater than 1;

a combining module 200, configured to perform synthesis processing on the N analog video signals to obtain a synthesized single-channel analog video signal;

a sending module 300, configured to send the single-channel analog video signal to a splitting device, so that the splitting device obtains the N-channel analog video signals according to the single-channel analog video, where data transmission is performed between the combining device and the splitting device through a cable.

In the embodiment of the present invention, the combining module 200 is configured to:

In this embodiment of the present invention, if the one-way analog video signal synthesized by the combining module 200 is synthesized by two analog video signals including the adjusted first-way analog video signal and the adjusted second-way analog video signal, a 2 nth frame of the one-way analog video signal is a picture of the first-way analog video signal, and a (2n +1) th frame of the one-way analog video signal is a picture of the second-way analog video signal, where n is any integer.

Optionally, if the single-channel analog video signal synthesized by the combining module 200 is synthesized by three channels of analog video signals including the adjusted first channel of analog video signal, the adjusted second channel of analog video signal, and the adjusted third channel of analog video signal, a 3 nth frame of the single-channel analog video signal is a picture of the first channel of analog video signal, a (3n +1) th frame of the single-channel analog video signal is a picture of the second channel of analog video signal, and a (3n +2) th frame of the single-channel analog video signal is a picture of the third channel of analog video signal.

Optionally, if the single-channel analog video signal synthesized by the combining module 200 is synthesized by four channels of analog video signals including the adjusted first channel of analog video signal, the adjusted second channel of analog video signal, the adjusted third channel of analog video signal, and the adjusted fourth channel of analog video signal, the 4n frame of the single-channel analog video signal is a picture of the first channel of analog video signal, the (4n +1) frame of the single-channel analog video signal is a picture of the second channel of analog video signal, the (4n +2) frame of the single-channel analog video signal is a picture of the third channel of analog video signal, and the (4n +3) frame of the single-channel analog video signal is a picture of the fourth channel of analog video signal.

Optionally, after the combining module 200 performs synthesis processing on the N analog video signals to obtain a synthesized single analog video signal, the combining module 200 is further configured to:

and filtering the single-path analog video signal to obtain a filtered single-path analog video signal. Since the functional description of each functional module in the analog video processing apparatus according to the embodiment of the present invention has been described in detail in the foregoing, no further description is given here.

Based on the same inventive concept, as shown in fig. 23, an embodiment of the present invention further provides an analog video processing apparatus, including:

the receiving module 1000 is configured to combine a single-channel analog video signal sent by a combining device, where the single-channel analog video signal is obtained by combining N channels of analog video signals with the combining device, where the combining device and the splitting device perform data transmission through a cable, the N channels of analog video signals are analog video signals sent by N image capturing devices electrically connected to the combining device, each image capturing device of the N image capturing devices outputs one channel of analog video signal, a frame rate of each channel of analog video signal in the N channels of analog video signals is M frames/second, N is an integer greater than 1, and M is a number greater than 1;

the splitting module 2000 is configured to perform splitting processing on the single-path analog video signal to obtain N split paths of analog video signals.

In an embodiment of the present invention, the splitting module 2000 is configured to:

In this embodiment of the present invention, if the N branched analog video signals split by the splitting module include a first split video signal and a second split video signal, a 2N frame and a (2N +1) frame of the first split video signal are a 2N frame of the single analog video signal, and a (2N +1) frame and a (2N +2) frame of the second split video signal are a (2N +1) frame of the single analog video signal.

In this embodiment of the present invention, if the N analog video signals split by the splitting module include a first split video signal, a second split video signal, and a third split video signal, a 3N frame, a (3N +1) th frame, and a (3N +2) th frame of the first split video signal are 3N frames of the one-way analog video signal, a (3N +1) th frame, a (3N +2) th frame, and a (3N +3) th frame of the second split video signal are (3N +1) th frames of the one-way analog video signal, and a (3N +2) th frame, a (3N +3) th frame, and a (3N +4) th frame of the third split video signal are (3N +2) th frames of the one-way analog video signal.

In the embodiment of the present invention, if the N analog video signals split by the splitting module include a first split video signal, a second split video signal, a third split video signal and a fourth split video signal, the 4N frame, the (4N +1) th frame, the (4N +2) th frame and the (4N +3) th frame of the first split video signal are the 4N frame of the one-way analog video signal, the (4N +1) th frame, the (4N +2) th frame, the (4N +3) th frame and the (4N +4) th frame of the second split video signal are the (4N +1) th frame of the one-way analog video signal, the (4N +2) th frame, the (4N +3) th frame, the (4N +4) th frame and the (4N +5) th frame of the third split video signal are the (4N +2) th frame of the one-way analog video signal, the (4n +3) th frame, the (4n +4) th frame, the (4n +5) th frame, and the (4n +6) th frame of the fourth divided video signal are the (4n +3) th frame of the one-way analog video signal.

Since the functional description of each functional module in the analog video processing apparatus according to the embodiment of the present invention has been described in detail in the foregoing, no further description is given here.

The division of the modules in the embodiments of the present application is schematic, and only one logical function division is provided, and in actual implementation, there may be another division manner, and in addition, each functional module in each embodiment of the present application may be integrated in one processor, may also exist alone physically, or may also be integrated in one module by two or more modules. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.

In some possible embodiments, the aspects of the analog video processing method provided in the present application may also be implemented in the form of a program product, which includes program code for causing a master device to perform the steps in the analog video processing method according to various exemplary embodiments of the present invention described above in this specification, when the program product is run on a computing device.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. A method of analog video processing, the method comprising:

2. The method of claim 1, wherein the combining device performs combining processing on the N analog video signals to obtain a combined single analog video signal, comprising:

3. The method of claim 2, wherein the combining device adjusts the N analog video signals to a same phase to obtain adjusted N analog video signals, comprising:

4. The method of claim 3, wherein the combining device combines the adjusted N analog video signals to obtain a combined single analog video signal, comprising:

the combining equipment sequentially extracts image frames to be combined from each analog video signal of the adjusted N analog video signals according to a frame period of 1/M second; and the combining equipment combines the image frames to be combined together at the moment of non-effective images to obtain a combined single-path analog video signal, wherein the (Nn + (k-1)) th frame in the single-path analog video signal is the picture of the k-th path analog video signal in the N paths of adjusted analog video signals, k is an integer which is more than 1 and not more than N, and N is any integer.

5. The method according to claim 4, wherein if the one-way analog video signal is synthesized from two analog video signals including the adjusted first way analog video signal and the adjusted second way analog video signal, a 2 n-th frame of the one-way analog video signal is a picture of the first way analog video signal, and a (2n +1) -th frame of the one-way analog video signal is a picture of the second way analog video signal, where n is any integer.

6. The method according to claim 4, wherein if the one-way analog video signal is synthesized from three-way analog video signals including the adjusted first, second and third analog video signals, the 3n frame of the one-way analog video signal is a picture of the first one-way analog video signal, the (3n +1) frame of the one-way analog video signal is a picture of the second one-way analog video signal, and the (3n +2) frame of the one-way analog video signal is a picture of the third one-way analog video signal.

7. The method according to claim 4, wherein if the one-way analog video signal is synthesized from four-way analog video signals including the adjusted first, second, third and fourth analog video signals, the 4n frames of the one-way analog video signal are pictures of the first one-way analog video signal, the (4n +1) th frame of the one-way analog video signal is a picture of the second one-way analog video signal, the (4n +2) th frame of the one-way analog video signal is a picture of the third one-way analog video signal, and the (4n +3) th frame of the one-way analog video signal is a picture of the fourth one-way analog video signal.

8. The method of claim 1, wherein after the combining device performs combining processing on the N analog video signals to obtain a combined single analog video signal, the method further comprises:

9. A method of analog video processing, the method comprising:

10. The method of claim 9, wherein the splitting device splits the single analog video signal to obtain N split analog video signals, comprising:

11. The method according to claim 10, wherein if the branched N analog video signals include a first branched video signal and a second branched video signal, the 2N frame and the (2N +1) frame of the first branched video signal are the 2N frame of the one-way analog video signal, and the (2N +1) frame and the (2N +2) frame of the second branched video signal are the (2N +1) frame of the one-way analog video signal.

12. The method according to claim 10, wherein if the N divided analog video signals include a first divided video signal, a second divided video signal and a third divided video signal, the 3N frame, the (3N +1) th frame and the (3N +2) th frame of the first divided video signal are the 3N frame of the one-way analog video signal, the (3N +1) th frame, the (3N +2) th frame and the (3N +3) th frame of the second divided video signal are the (3N +1) th frame of the one-way analog video signal, and the (3N +2) th frame, the (3N +3) th frame and the (3N +4) th frame of the third divided video signal are the (3N +2) th frame of the one-way analog video signal.

13. The method according to claim 10, wherein if the N divided analog video signals include a first divided video signal, a second divided video signal, a third divided video signal and a fourth divided video signal, the 4N, 4N +1, 4N +2 and 4N +3 frames of the first divided video signal are the 4N frames of the one-way analog video signal, the 4N, 4N +2, 4N +3 and 4N +4 frames of the second divided video signal are the (4N +1) th frames of the one-way analog video signal, the 4N +2, 4N +3, 4N +4 and 4N +5) th frames of the third divided video signal are the (4N +2) th frames of the one-way analog video signal, the (4n +3) th frame, the (4n +4) th frame, the (4n +5) th frame, and the (4n +6) th frame of the fourth divided video signal are the (4n +3) th frame of the one-way analog video signal.

14. An analog video processing system, comprising: the system comprises a combining device and a shunting device which performs data transmission with the combining device through a cable; wherein:

15. A combining device, comprising:

16. The combining device of claim 15, wherein the combining processing unit includes a phase processing unit and a combining unit electrically connected to the phase processing unit, wherein:

17. The combining device of claim 16, wherein the phase processing unit comprises a phase detection unit and a phase modulation unit electrically connected to the phase detection unit, wherein:

18. The combining device of claim 16, wherein the combining unit includes a control unit and a switching unit electrically connected to the control unit, wherein:

19. The combining device according to claim 15, wherein the transmitting unit includes a filtering unit electrically connected to the switching unit, and the filtering unit is configured to filter the single-channel analog video signal to obtain a filtered single-channel analog video signal.

20. A routing device, comprising:

21. The shunt device of claim 20, wherein said shunt processing unit includes a phase modulation unit electrically connected to said impedance transformation unit, wherein:

22. The shunt device according to claim 21, wherein the shunt processing unit further includes a control unit electrically connected to the impedance transforming unit and the phase modulating unit, respectively, and N switching units electrically connected to the control unit, and the N switching units are electrically connected to the impedance transforming unit, wherein: