TWI604730B - Monitoring system with single coaxial transmission 4-in-1 signal function - Google Patents

Description

Monitoring system with single coaxial transmission four-in-one signal function

The invention relates to a monitoring system, in particular to a monitoring system with a single coaxial transmission four-in-one signal function.

The advancement of technology has brought about the vigorous development of the surveillance industry. At present, the mainstream of the surveillance market is to support the monitoring system of the HD analog format. The so-called high definition refers to the video format with a resolution of up to 720P, and the high definition composite image interface (High Definition) Composite Video Interface (HDCVI), High Definition Transport Video Interface (HDTVI), Analog High Definition (AHD) and other formats are most commonly used.

For users, if you want to upgrade the traditional analog system to CVI, TVI, AHD and other high-definition analog monitoring systems, it is not difficult to install and construct. If you want to upgrade the monitoring system, you don't need to change the original system architecture. Moreover, CVI, TVI and AHD can be applied to coaxial cable transmission, so it is quite popular in the market. However, CVI is not compatible with the analog interface of the same picture quality, and TVI does not support ISP and TX two-in-one. The signal transmission method and system control method used in the technology are different. For example, when using coaxial technology, the image signal and the power signal are transmitted coaxially; when using the non-coaxial technology, the image signal, the control signal, and the power signal must be used. Transfer in different axes.

Based on the prior art, no matter which video format, signal transmission mode and system control method are used, there are still some shortcomings. If you want to integrate the monitoring system with high-definition analogy, the user's construction is inconvenient and the cost is increased. System signal transmission method and system controller The construction is more difficult and the cost is higher, so the existing technology still needs to propose a better improvement plan.

In view of the above deficiencies of the prior art, the main object of the present invention is to provide a monitoring system with a single coaxial transmission four-in-one signal function, which transmits a processed majority digital signal through a single coaxial cable, by integrating images and sounds. , control and power supply, so that most signals and power can be transmitted simultaneously in the monitoring system to improve construction convenience and reduce costs.

The main technical means adopted for achieving the above purpose is that the foregoing monitoring system having a single coaxial transmission four-in-one signal function includes: a transmitter for connecting more than one input device and one or more output devices; a coaxial line, The first end is connected to the transmitter, and is configured to transmit a plurality of signals including a power signal and a mixing signal thereof; and a multi-function receiver is coupled to the coaxial line The second end is connected, and the other output device is connected to the other input device; wherein, when the multi-function receiver receives a high-definition video signal, an audio signal, and a control signal, The high-definition video signal, the audio signal, and the control signal are divided and decoded to generate a plurality of corresponding signals; when the transmitter receives another audio signal, another control signal, and a power signal mixed signal , the power signal is extracted first, and then the other audio signal and the other control signal are divided and decoded to generate another phase. Signal.

With the above configuration, the transmitter can be connected to more than one input device and connected to more than one output device. When the transmitter receives the high-definition video signal, the audio signal, and the control signal through more than one input device, Transmitting, converting, and mixing the high-definition video signal, the audio signal, and the control signal through the first end of the coaxial line and the multi-function receiving Or the transmitter receives the audio signal transmitted by the multi-function receiver, the control signal digital mixing signal, and the power supply through the first end of the coaxial line, and first extracts the power supply for the transmitter and the transmitter. The input and output devices are used, and then the audio signal and the control signal are frequency-divided and demodulated to generate corresponding signals for connection to more than one output device; the second end of the coaxial line and the multi-function receiving The multi-function receiver can be connected to more than one output device and connected to more than one input device. When the multi-function receiver receives the high-definition video signal, the audio signal, the second end of the coaxial line, the multi-function receiver When the digital mixing signal of the control signal is controlled, the high-definition video signal, the audio signal, and the control signal are frequency-divided and demodulated, and most of the corresponding signals are restored, and then provided to the corresponding output device; or, when When the multi-function receiver receives the audio signal, the control signal and the power source through the one or more input devices, the audio signal, the control signal The modulation processing is performed, and the power source is inserted into the processing to generate a corresponding mixing signal, and then the coaxial cable is provided to the transmitter, so that most signals are carried and the power is simultaneously transmitted, thereby improving construction convenience and reducing cost. the goal of.

10‧‧‧transmitter

101‧‧‧ filter

102‧‧‧First output unit

103‧‧‧Second input unit

104‧‧‧Second low pass filter

105‧‧‧ converter

11,41‧‧‧Input equipment

12,40‧‧‧Output equipment

20‧‧‧ coaxial cable

30‧‧‧Multi-function receiver

301‧‧‧Modulation unit

302‧‧‧first input unit

303‧‧‧second output unit

304‧‧‧First low pass filter

305‧‧‧ Voltage Regulator

31‧‧‧First connection埠

32‧‧‧Second connection埠

33‧‧‧Video Processing Module

331‧‧‧ Equalizer

332‧‧‧Image decoder

333‧‧‧Image Processor

334‧‧‧Audio decoder

34‧‧‧Microcontroller

35‧‧‧Power Module

1 is a block diagram of a system architecture in accordance with a preferred embodiment of the present invention.

2 is a block diagram of another system architecture in accordance with a preferred embodiment of the present invention.

3 is a schematic diagram of an application state coordinate of a preferred embodiment of the present invention.

4 is a schematic diagram of a mixing upload mode in accordance with a preferred embodiment of the present invention.

FIG. 5 is a schematic diagram of a mode of inserting an occlusion signal according to a preferred embodiment of the present invention.

6 is a schematic diagram of another mixing upload mode according to a preferred embodiment of the present invention.

For a preferred embodiment of the monitoring system of the present invention having a single coaxial transmission four-in-one signal function, please refer to FIG. 1 , which includes a transmitter 10 , a coaxial line 20 and a multi-function connection. a transmitter 30 for connecting more than one input device 11 and one or more output devices 12 for connecting more than one output device 40 and one or more input devices 41, the coaxial The line 20 has a first end and a second end. The first end of the coaxial line 20 is connected to the transmitter 10, and is configured to transmit a majority of signals including a power signal and a mixing signal thereof. The coaxial line 20 The second end is connected to the multi-function receiver 30.

When the multi-function receiver 30 receives a high-definition video signal, an audio signal, and a control signal mixing signal through the second end of the coaxial line 20, the high-definition video signal, the audio signal, and the control The signal performs frequency division and demodulation processing to generate a plurality of corresponding signals, which are then supplied to the corresponding output device 40.

Moreover, when the multi-function receiver 30 receives the audio signal, the control signal, and the power signal through the input device 41, the audio signal, the control signal, and the power signal are executed in a mixed upload mode. Processing to generate a plurality of corresponding digital mixing signals, and then transmitting signals to the transmitter 10 through the second end of the coaxial line 20, and then extracting the power signal by the transmitter 10, performing frequency division and demodulation, and then uploading To the corresponding output device 12.

The coaxial cable 20 simultaneously transmits high-definition video signals, audio signals, control signals and power signals, and modulates all signals at different frequencies, so that most signals are carried and power is simultaneously transmitted, thereby improving construction convenience. The purpose of reducing costs.

Referring to FIG. 2, in the preferred embodiment, the transmitter 10 can simultaneously connect a plurality of input devices 11 and output devices 12, and the multi-function receiver 30 can simultaneously connect a plurality of output devices 40 and input devices 41. The input device 11 may include a camera, a microphone or an alarm device, and the input device 41 may include a microphone or an alarm device, and the output devices 12, 40 may include an alarm, a string A communication interface, a speaker, a fan, a display, or a video device; in this embodiment, the coaxial line 20 has a plurality of digital signal channels, and most of the digital signal channels The high-definition video signal, audio signal, control signal, power signal and corresponding mixed signal can be synchronously uploaded and transmitted.

Further, the multi-function receiver 30 includes a first port 31, a second port 32, a video processing module 33, a microcontroller 34, and a power module 35. The first port is configured. The 31 series is connected to the second end of the coaxial line 20, and the second port 32 is connected to the output device 40 and the input device 41. The audio processing module 33 is connected to the first port 31.

The power module 35 is connected to the first port 31 and the second port 32 to receive the power signal, and is configured to be powered by the first port 31 according to the power signal insertion and mixing upload mode. The transmitter 10 is used with the input device 11 and the output device 12; the microcontroller 34 is connected to the first port 31, the audio processing module 33, and the second port 32, respectively. The control signal sent by the first port 31 or the second port 32 is received, and the microcontroller 34 is separately sent to each module in the multi-function receiver 30.

In the preferred embodiment, the video processing module 33 includes an equalizer 331, a video decoder 332, an image processor 333, and an audio decoder 334. The video decoder 332 is connected to the video decoder 332. The image processor 333, the image decoder 334, and the audio decoder 334 are respectively connected to the first port 31 and the microcontroller 34. The image processor 333 and the sound decoder 334 respectively The second port is connected to the second port 32. The high-definition video signal sent by the first port 31 is received by the equalizer 331 or decoded by the video decoder 332 to obtain a digital video signal and then the image is obtained. The processor 333 sends the high-definition video signal to the second port 32. The audio decoder 334 receives the digital audio signal obtained by the video decoder 332, and then sends the signal to the second port 32 to make all the signals different. Frequency division and demodulation, so that most signals are carried and the power is transmitted simultaneously.

Further, in the preferred embodiment, the transmission interface of the high-definition video signal may include an analog high definition (AHD) and a high-definition video transmission interface (High). The Definition Transport Video Interface (HDTVI) or a High Definition Composite Video Interface (HDCVI); the signal interface of the coaxial line 20 may include an extended serial digital interface (EX-SDI).

In the preferred embodiment, the control signal may include a control over cable (CoC) signal, and the coaxial cable control signal is modulated, and then transmitted to the corresponding input device 11 through the coaxial cable 20; The power signal can include a Power over Cable signal through which power is supplied to the corresponding transmitter 10, input device 11, and output device 12.

To illustrate the application mode of the preferred embodiment of the present invention, for example, after the power-on signal and the mixing upload and downlink mode are executed, all the signals are modulated by different frequencies, and then the power is simultaneously transmitted, as shown in FIG. The display includes a horizontal axis and a vertical axis. The horizontal axis represents the frequency, and the vertical axis represents the signal size. Assuming that the signal size of all signals is A, the frequency of the power signal S1 is F1, and the frequency of the control signal S2 is F2 ( The frequency can be 600KHz), the frequency of the sound signal S3 is F3 (the frequency can be 2.8MHz), and the frequency of the image signal S4 is F4 (the frequency can be 270MHz).

Referring to FIG. 4, a transmitter, a filter 101, and a first output unit 102 are provided by the transmitter 10. The transmitter end of the transmitter 10 is connected to the first end of the coaxial line 20. The input end of the filter 101 is connected to the transmitting end of the transmitter 10. The output end of the filter 101 is connected to the first output unit 102. Further, the multi-function receiver 30 provides a receiving end and a tone. a receiving unit 301 and a first input unit 302. The receiving end of the multi-function receiver 30 is connected to the second end of the coaxial line 20, and the input end of the modulating unit 301 is connected to the first input unit 302. The output end of the modulating unit 301 is connected to the receiving end of the multi-function receiver 30. If the mixing mode is to be executed, a control signal or a digital audio signal may be mixed and uploaded through the first input unit 302. In this embodiment, the first input unit 302 can be a Pelco format generator or an audio amplifier, and the first output unit 102 can be a Pelco format drive unit or an audio demodulation transformer.

Referring to FIG. 5, if the foregoing mixing mode is to be performed, the transmitter 10 further provides a second input unit 103, and the multi-function receiver 30 further provides a second output unit 303; wherein the second input The unit 103 is connected to the transmitting end, and the second output unit 303 is connected to the receiving end, and the second input unit 103 can be modulated by inserting another digital audio signal or a digital control signal (meaning the high definition image) The signal, the audio signal, and the control signal are mixed and transmitted, and transmitted to the second output unit 303 of the multi-function receiver 30 through the coaxial line 20; in this embodiment, the second input unit 103 can be a digit A signal generator or a class of analog encoders (ADC Encoder), the second output unit 303 can be a Pelco format drive unit or a digital/analog encoder (DAC Decoder).

In addition, when the power signals of the foregoing input devices 11 and 41 are DC power, and the foregoing power insertion upload mode is to be executed, please refer to FIG. 6 , wherein the manner of mixing uploading is the same as that in FIG. 4 described above. The corresponding description is the same, but the modulation unit 301 can be replaced by a first low-pass filter 304, which can be replaced by a second low-pass filter 104, which can be replaced by a voltage regulator. Substituted 305, the first output unit 102 can be replaced by a converter 105. Therefore, through the description of the preferred embodiment of the present invention, the present invention provides a technique of mixing and frequency division, which mixes image, control, sound and power on the coaxial line 20 at different frequencies, different directions, and mixing. And performing coaxial transmission, and separately processing different frequency signals between the transmitter 10 and the input device 11 and the output device 12, and the multi-function receiver 30 and the input device 41 and the output device 40, respectively, by using different filters. Make them do not interfere with each other.

10‧‧‧transmitter

20‧‧‧ coaxial line

11,41‧‧‧Input equipment

12,40‧‧‧Output equipment

30‧‧‧Multi-function receiver

Claims (9)

A monitoring system having a single coaxial transmission four-in-one signal function, comprising: a transmitter for connecting more than one input device and one or more output devices; a coaxial line having a first end and a second end The first end is connected to the transmitter and configured to transmit a plurality of signals including a power signal and a mixing signal thereof; and a multi-function receiver is connected to the second end of the coaxial line and is provided for another one or more The output device is connected to another input device; wherein, when the multi-function receiver receives a high-definition video signal, an audio signal, and a control signal, the high-definition video signal, the audio signal, and The control signal is divided and decoded to generate a plurality of corresponding signals; when the transmitter receives a mixed signal of another audio signal, another control signal, and a power signal, the power signal is extracted first, and then the signal is extracted. The other audio signal and the other control signal are divided and decoded to generate a plurality of corresponding signals; wherein when the multi-function receiver transmits When the input device receives the audio signal, the control signal and the power signal, the audio signal, the control signal and the power signal are processed in a mixing upload mode to generate a plurality of corresponding mixing signals, and then The transmitter extracts the power to the corresponding input device and output device, and divides the signal and demodulates the signal into the corresponding output device. The monitoring system of claim 1 , wherein the multi-function receiver receives the high-definition video signal, the audio signal, and the control signal by using the second end of the coaxial line The mixed video signal, the high-definition video signal, the audio signal, and the control signal are divided and decoded to generate a plurality of corresponding signals, and then provided to the corresponding output device. The monitoring system of claim 1 has a single coaxial transmission four-in-one signal function, and the multi-function receiver comprises a first connection port, a second connection port, an audio and video processing module, and a a microcontroller and a power module; wherein the first connection is connected to the second end of the coaxial line, and the second connection is connected to a corresponding input device and an output device, and the audio processing module is connected The first connection port and the second connection port; the power module is connected to the first port and the second port, and the microcontroller is respectively connected to the first port, the audio processing module, and the The second port is connected, and the microcontroller is responsible for performing a frequency division download mode or a mix upload mode. The monitoring system of claim 3, wherein the audio processing module comprises an equalizer, an image decoder, an image processor and an audio decoder; wherein the image is The decoder is respectively connected to the equalizer, the image processor, and the audio decoder, and the equalizer is respectively connected to the first port and the micro controller, and the image processor and the sound decoder respectively respectively Two connections are connected. A monitoring system having a single coaxial transmission four-in-one signal function as claimed in claim 1, wherein the transmitter provides a transmitting end, a filter and a first output unit, and the transmitting end of the transmitter and the coaxial line The first end is connected, the input end of the filter is connected to the transmitting end of the transmitter, and the output end of the filter is connected to the first output unit; further, the multi-function receiver provides a receiving end and a modulation a unit and a first input unit, the receiving end of the multi-function receiver is connected to the second end of the coaxial line, the input end of the modulation unit is connected to the first input unit, and the output end of the modulation unit is Connecting the receiving end of the multi-function receiver; and performing a mixing upload mode, and mixing the audio signal, the control signal, and the power source. The monitoring system of claim 5, wherein the first input unit is a receiver or an audio amplifier, and the first output unit is a driving unit or an audio demodulation device. . A monitoring system having a single coaxial transmission four-in-one signal function as claimed in claim 6, wherein the modulation unit is replaced by a first low-pass filter, and the filter is provided by a second low-pass filter Instead, the first input unit is replaced by a voltage regulator that is replaced by a converter. The monitoring system of claim 1 has a single coaxial transmission four-in-one signal function, wherein the transmitter provides a transmitting end and a second input unit, and the multi-function receiver provides a receiving end and a second output unit. The second input unit is connected to the transmitting end, and the second output unit is connected to the receiving end; performing a mixing insertion mode to insert the high-definition video signal, the audio signal, and the control signal; The input unit is a receiver or an analog/digital encoder, and the second output unit is a drive unit or a digital/analog encoder. The monitoring system of the single coaxial transmission four-in-one signal function according to any one of claims 1 to 8, wherein the transmission interface of the high-definition video signal comprises an analog high-definition interface, a high-definition image transmission interface or a high-definition composite image interface. The signal interface of the coaxial line includes an extended serial digital signal interface; the control signal includes a coaxial cable control signal; and the power signal includes a coaxial cable power supply signal.