Converter for converting high-definition analog video signal into HDMI signal

Abstract

The utility model provides a converter for converting a high-definition analog video signal into an HDMI signal. The converter comprises a BNC input module, a BNC output module, an image processing module, a signal conversion module, an HDMI output module and a storage module, the BNC input module is respectively connected with the BNC output module and the image processing module; the image processing module is respectively connected with the storage module and the signal conversion module; and the signal conversion module is connected with the HDMI output module. According to the utility model, the high-definition video analog signal can be converted into the HDMI signal through the hardware module and the circuit thereof, and the original high-definition analog video signal is output for other equipment or purposes while the high-definition analog video signal is converted into the HDMI signal, so that the requirements of more practical application scenes are met.

Description

Technical Field

[0001] The utility model relates to the technical field of video signal conversion, in particular to a converter capable of converting high-definition analog video signals into HDMI signals. Background Art

[0002] Current high-definition analog video signals include AHD signals, CVI signals and TVI signals. AHD is analog high definition, and its full English name is Analog High Definition; CVI is a high-definition composite video interface, and its full English name is HighDefinition Composite Video Interface; TVI is a high-definition video transmission interface, and its full English name is HighDefinition Transport Video Interface; high definition refers to high definition, which is used to represent video signals reaching 720P50 / 60Hz or above. In the prior art, the converters for converting the above high-definition analog video signals into HDMI signals generally have the problem of insufficient frame rate support. Most products can only process frame rate conversions of 25Hz or 30Hz, and it is difficult to meet the conversion requirements of high-frame-rate video signals for 720P50 / 60Hz or 1080P50 / 60Hz high-definition video signals, which limits the use of high-definition video signals in application fields with specific requirements for high frame rates such as security monitoring and medical imaging. In addition, in some existing video application scenarios, such as in a security monitoring system, it is necessary to convert high-definition video signals into HDMI signals for high-definition display, and at the same time, it is necessary to send the original analog video signals to recording devices or other monitoring devices. Existing video signal converters cannot well meet the actual use needs described above. Summary of the Invention

[0003] The technical problem to be solved by the utility model is to provide a converter for converting high-definition analog video signals into HDMI signals, aiming to be able to convert high-definition video analog signals into HDMI signals through a hardware circuit, and while converting high-definition analog video signals into HDMI signals, output the original high-definition analog video signals for other devices or uses.

[0004] To this end, the utility model provides a converter for converting high-definition analog video signals into HDMI signals, including: a BNC input module, a BNC output module, an image processing module, a signal conversion module, an HDMI output module and a storage module; the BNC input module is respectively connected to the BNC output module and the image processing module; the image processing module is respectively connected to the storage module and the signal conversion module; the signal conversion module is connected to the HDMI output module.

[0005] A further improvement of the present utility model lies in that the image processing module includes an RGB signal output interface, and the RGB signal output interface is connected to the signal conversion module.

[0006] A further improvement of the present utility model lies in that the signal conversion module includes an HDMI signal output interface, and the HDMI signal output interface is connected to the HDMI output module.

[0007] A further improvement of the present utility model lies in that the image processing module includes an image processing chip U12, and the image processing chip U12 is connected to the signal conversion module through the RGB signal output interface; the storage module includes a storage chip U13, and the storage chip U13 is connected to the image processing chip U12.

[0008] A further improvement of the present utility model lies in that the signal conversion module includes a signal conversion chip U1401, and the signal conversion chip U1401 is connected to the HDMI output module through the HDMI signal output interface.

[0009] A further improvement of the present utility model lies in that the HDMI output module includes a TVS protection unit, a level conversion unit, a boost unit, and an HDMI socket J4. The TVS protection unit, the level conversion unit, and the boost unit are respectively connected to the HDMI socket J4, and the boost unit is respectively connected to the level conversion unit and the HDMI socket J4.

[0010] A further improvement of the present utility model lies in that the BNC input module includes a BNC connector J11, a resistor R90, a resistor R91, a capacitor C73, and a capacitor C75; one end of the BNC connector J11 is respectively connected to one end of the resistor R91 and one end of the capacitor C73, the other end of the resistor R91 is connected to the image processing module through the capacitor C75, and the other end of the capacitor C73 is connected to the image processing module through the resistor R90.

[0011] A further improvement of the present utility model lies in that the BNC output module includes a resistor R104, a resistor R125, a capacitor C76, a high-definition video filtering chip U113, and a BNC connector J10; one end of the capacitor C76 is respectively connected to the BNC connector J11 and one end of the resistor R104, the other end of the capacitor C76 is connected to the high-definition video filtering chip U113, the other end of the resistor R104 is grounded; the high-definition video filtering chip U113 is connected to the BNC connector J10 through the resistor R125.

[0012] A further improvement of the present utility model lies in that the BNC output module further includes a varistor RV100, a capacitor C124 and a capacitor C123. One end of the varistor RV100 is connected to the BNC connector J10, and the other end is grounded. The high-definition video filtering chip U113 is respectively connected to the power supply terminal through the capacitor C124 and the capacitor C123, and the capacitor C124 and the capacitor C123 have different capacitance values.

[0013] A further improvement of the present utility model lies in that the BNC input module further includes a resistor R87 and an ESD protection diode ESD14. One end of the resistor R87 is grounded, and the other end is connected to the BNC connector J11. One end of the ESD protection diode ESD14 is grounded, and the other end is connected to the BNC connector J11.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows: A converter for converting high-definition analog video signals to HDMI signals is proposed, which can convert high-definition video analog signals into HDMI signals. Through the hardware module and its circuit, the problem that the existing HDMI signal converters have insufficient support for frame rate under high-definition analog video signals is solved. At the same time, it also supports the same-source and homogeneous output of the original high-definition video analog signal. While converting the high-definition video analog signal into an HDMI signal, the original high-definition video analog signal is output for other devices or uses, meeting the requirements of more actual application scenarios. Description of the Drawings

[0015] Figure 1 is the circuit principle block diagram of an embodiment of the present utility model;

[0016] Figure 2 is the partial circuit schematic diagram of an embodiment of the present utility model;

[0017] Figure 3 is the circuit schematic diagram of the signal conversion module of an embodiment of the present utility model;

[0018] Figure 4 is the circuit schematic diagram of the HDMI output module of an embodiment of the present utility model;

[0019] Figure 5 is the circuit schematic diagram of the storage module of an embodiment of the present utility model.

[0020] Reference Signs: 1 - BNC input module; 2 - BNC output module; 3 - image processing module; 301 - RGB signal output interface; 4 - signal conversion module; 401 - HDMI signal output interface; 5 - HDMI output module; 501 - TVS protection unit; 502 - level conversion unit; 503 - boost unit; 6 - storage module. Detailed implementation manners

[0021] In the description of the present utility model, if orientation descriptions are involved, such as "upper", "lower", "front", "rear", "left", "right", etc., the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. If a technical feature is described as "arranged", "fixed", "connected", or "installed" on another technical feature, it can be directly arranged, fixed, connected, or installed on the other technical feature, or indirectly arranged, fixed, connected, or installed on the other technical feature.

[0022] In the description of the present utility model, if "several" is involved, its meaning is more than one; if "a plurality" is involved, its meaning is more than two; if "greater than", "less than", or "exceeding" is involved, it should be understood as not including the present number; if "above", "below", or "within" is involved, it should be understood as including the present number. If "first", "second", etc. are involved, it should be understood that they are only used for the distinction of the names of the same or similar technical features, and cannot be understood as implying / indicating the relative importance of the technical features, cannot be understood as implying / indicating the quantity of the technical features, nor can it be understood as implying / indicating the sequence relationship of the technical features.

[0023] The following further describes in detail the preferred embodiments of the present utility model with reference to the accompanying drawings:

[0024] As Figure 1 shown, this embodiment provides a converter for converting a high-definition analog video signal into an HDMI signal, including: a BNC input module 1, a BNC output module 2, an image processing module 3, a signal conversion module 4, an HDMI output module 5, and a storage module 6; the BNC input module 1 is respectively connected to the BNC output module 2 and the image processing module 3; the image processing module 3 is respectively connected to the storage module 6 and the signal conversion module 4; the signal conversion module 4 is connected to the HDMI output module 5.

[0025] As Figure 2 and Figure 3 shown, the image processing module 3 includes an RGB signal output interface 301, and the RGB signal output interface 301 is connected to the signal conversion module 4.

[0026] As Figure 3 and Figure 4As shown, the signal conversion module 4 includes an HDMI signal output interface 401, and the HDMI signal output interface 401 is connected to the HDMI output module 5.

[0027] As Figure 2 and Figure 3 shown, the image processing module 3 includes an image processing chip U12, and the image processing chip U12 is connected to the signal conversion module 4 through an RGB signal output interface 301.

[0028] As Figure 3 and Figure 4 shown, the signal conversion module 4 includes a signal conversion chip U1401, and the signal conversion chip U1401 is connected to the HDMI output module 5 through the HDMI signal output interface 401.

[0029] As Figure 2 and Figure 5 shown, the storage module 6 includes a storage chip U13, and the storage chip U13 is connected to the image processing chip U12.

[0030] More specifically, as Figures 1 to 5 shown, after the high-definition analog video signal is accessed to the converter through the BNC input module 1, the high-definition video analog signal is converted into an RGB video signal by the image processing chip U12 in the image processing module 3, and the RGB video signal is output to the signal conversion chip U1401 of the signal conversion module 4 through the RGB signal output interface 301. The RGB video signal is converted into an HDMI signal in the signal conversion chip U1401, and the HDMI signal is output to the HDMI output module 5 through the HDMI signal output interface 401. The HDMI output module 5 outputs the HDMI signal to a display device that receives the HDMI signal. Among them, the storage chip U13 of the storage module 6 is used to store the operating program of the image processing chip U12. The image processing chip U12 is connected to the storage chip U13 and performs data communication. In this embodiment, the storage chip U13 preferably uses a W25Q128 chip. Among them, BNC is the English abbreviation of Bayonet Nut Connector, referring to a coaxial cable connection joint.

[0031] Furthermore, as Figures 2 to 4As shown, in this embodiment, the image processing chip U12 preferably uses the TP6891 chip. The AD circuit inside the TP6891 (TP6806) chip supports high-speed oversampling, automatic gain, and adaptive equalization algorithms, and can convert 720P50 / 60Hz or 1080P50 / 60Hz high-definition video analog signals into RGB video signals. The TP6891 chip can also be replaced with the TP6806 chip of TECHPOINT, or other image processing chips / video processing chips of the same type, etc. The signal conversion chip U13 preferably uses the Sil9024 chip, which can convert RGB video signals into HDMI signals and transmit the HDMI signals. After the TP6891 (TP6806) converts the received high-definition analog video signals into RGB video signals, it outputs the RGB signals to the Sil9024 through the RGB signal output interface 301. After the Sil9024 converts the RGB video signals into HDMI signals, it outputs the HDMI signals to the HDMI output module 5 through the HDMI signal output interface 401, and the HDMI output module 5 outputs the HDMI signals to the display device that receives the HDMI signals.

[0032] More specifically, as Figure 4 shown in the circuit, the HDMI output module 5 in this embodiment includes a TVS protection unit 501, a level conversion unit 502, a boost unit 503, and an HDMI socket J4. The TVS protection unit 501, the level conversion unit 502, and the boost unit 503 are respectively connected to the HDMI socket J4, and the boost unit 503 is respectively connected to the level conversion unit 502 and the HDMI socket J4. In the HDMI output module 5, the HDMI socket J4 is preferably an HDMI Type A socket for connecting an external HDMI display device. In the TVS protection unit 501, the TVS chips D902 and D901 are TVS array chips for suppressing instantaneous overvoltage and protecting the internal circuits and chips. In the boost unit 503, the boost chip U903 is a DC-DC converter that boosts the 3.3V power supply to 5.5V to provide the 5V power supply required by the HDMI socket J4 (HMDI Type A) and provide 5V power supply for the level conversion unit 502. In the level conversion unit 502, the 3.3V level signals DDC_SC and DDC_SD output by the Sil9024 are respectively converted into 5V level signals HDMI_SC and HDMI_SD through the circuit of the level conversion unit 502. The function of the HDMI output module 5 is to provide an output interface for connecting an external HDMI display device, provide protection for the HDMI output interface of the converter, and at the same time provide the 5V power supply required by the HMDI Type A interface and the conversion from 3.3V level signals to 5V level signals.

[0033] It can be seen that the converter provided in this embodiment realizes the conversion of high-definition analog video signals to HDMI signals through hardware modules and their circuits, and can convert 720P50 / 60Hz or 1080P50 / 60Hz high-definition video analog signals into HDMI signals, solving the problem of insufficient frame rate support of existing HDMI signal converters under high-definition analog video signals.

[0034] As Figure 2 shown, the BNC input module 1 includes a BNC connector J11, a resistor R90, a resistor R91, a capacitor C73, and a capacitor C75; one end of the BNC connector J11 is respectively connected to one end of the resistor R91 and one end of the capacitor C73, the other end of the resistor R91 is connected to the image processing module 3 through the capacitor C75, and the other end of the capacitor C73 is connected to the image processing module 3 through the resistor R90.

[0035] As Figure 2 shown, the BNC output module 2 includes a resistor R104, a resistor R125, a capacitor C76, a high-definition video filtering chip U113, and a BNC connector J10; one end of the capacitor C76 is respectively connected to one end of the BNC connector J11 and one end of the resistor R104, the other end of the capacitor C76 is connected to the high-definition video filtering chip U113, and the other end of the resistor R104 is grounded; the high-definition video filtering chip U113 is connected to the BNC connector J10 through the resistor R125.

[0036] Furthermore, as Figure 2 shown, the high-definition analog video signal is input into the converter through the BNC connector J11 of the BNC input module 1 and is divided into two input signals. One of the signals is input into the image processing module 3 through the BNC input module 1 and is converted into an HDMI signal through the processing of subsequent circuits and sent to the display device; the other signal is connected to the BNC output module 2. After being processed by the circuit of the BNC output module 2, the input high-definition analog video signal is output to an external high-definition analog display device in the same quality and source through the BNC connector J10. In this embodiment, the high-definition video filtering chip U113 is preferably a TPF147 chip, and the main function of the high-definition video filtering chip U113 is to amplify and filter the video signal.

[0037] It should be noted that the above description of the output of the signal being homogeneous and homologous means that: in this embodiment, the received high-definition analog video signal is converted into an HDMI signal and transmitted. On this basis, the signal of the original high-definition analog video can also be output again for use by other devices or for other purposes. Here, "homologous" means that the signal comes from the same input, and "homogeneous" means that the output signal has the same quality or characteristics as the original signal.

[0038] As Figure 2 shown, the BNC output module 2 further includes a varistor RV100. One end of the varistor RV100 is connected to the BNC connector J10, and the other end is grounded. More specifically, the varistor RV100 in this embodiment preferably uses an EZJZ800AA multi-layer varistor, which is mainly used for protecting against ESD pulses.

[0039] As Figure 2 shown, the BNC input module 1 further includes a resistor R87 and an ESD protection diode ESD14; one end of the resistor R87 is grounded, and the other end is connected to the BNC connector J11; one end of the ESD protection diode ESD14 is grounded, and the other end is connected to the BNC connector J11. More specifically, the main function of the ESD protection diode ESD14 in this embodiment is to perform ESD protection on the input of the BNC connector J11 to prevent damage to the circuit and chip of the converter caused by static electricity introduced at the BNC connector J11. The resistor R87 is used for single-ended 75-ohm impedance matching of the input signal.

[0040] In summary, the present invention proposes a converter for converting a high-definition analog video signal into an HDMI signal, which can convert a 720P50 / 60Hz or 1080P50 / 60Hz high-definition video analog signal into an HDMI signal, solving the problem of insufficient frame rate support of existing HDMI signal converters under high-definition analog video signals. At the same time, it also supports the homogeneous and homologous output of the original high-definition video analog signal, which can meet the requirement of using the original high-definition analog video signal for other devices or purposes while converting the high-definition analog video signal into an HDMI signal, meeting the needs of more actual application scenarios.

[0041] The above content is a further detailed description of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can still be made, and all should be regarded as belonging to the protection scope of the present invention.

Claims

1. A converter for converting high-definition analog video signals to HDMI signals, characterized in that: include: BNC input module, BNC output module, image processing module, signal conversion module, HDMI output module and storage module; the BNC input module is respectively connected to the BNC output module and the image processing module; the image processing module is respectively connected to the storage module and the signal conversion module; the signal conversion module is connected to the HDMI output module.

2. The converter for converting high-definition analog video signals to HDMI signals according to claim 1, characterized in that: The image processing module includes an RGB signal output interface, and the RGB signal output interface is connected to the signal conversion module.

3. The converter for converting high-definition analog video signals to HDMI signals according to claim 2, characterized in that: The signal conversion module comprises an HDMI signal output interface, and the HDMI signal output interface is connected to the HDMI output module.

4. The converter for converting high-definition analog video signals to HDMI signals according to claim 2, characterized in that: The image processing module includes an image processing chip U12, and the image processing chip U12 is connected to the signal conversion module via an RGB signal output interface; the storage module includes a storage chip U13, and the storage chip U13 is connected to the image processing chip U12.

5. The converter for converting high-definition analog video signals to HDMI signals according to claim 3, characterized in that: The signal conversion module includes a signal conversion chip U1401, and the signal conversion chip U1401 is connected to the HDMI output module through the HDMI signal output interface.

6. The converter for converting high-definition analog video signals to HDMI signals according to claim 1, characterized in that: The HDMI output module includes a TVS protection unit, a level conversion unit, a boost unit, and an HDMI socket J4. The TVS protection unit, the level conversion unit, and the boost unit are respectively connected to the HDMI socket J4, and the boost unit is respectively connected to the level conversion unit and the HDMI socket J4.

7. The converter for converting high-definition analog video signals to HDMI signals according to any one of claims 1 to 6, characterized in that: The BNC input module includes a BNC connector J11, a resistor R90, a resistor R91, a capacitor C73 and a capacitor C75; the BNC connector J11 is connected to one end of the resistor R91 and one end of the capacitor C73 respectively, the other end of the resistor R91 is connected to the image processing module through the capacitor C75, and the other end of the capacitor C73 is connected to the image processing module through the resistor R90.

8. The converter for converting high-definition analog video signals to HDMI signals according to claim 7, characterized in that: The BNC output module includes a resistor R104, a resistor R125, a capacitor C76, a high-definition video filter chip U113 and a BNC connector J10; one end of the capacitor C76 is respectively connected to the BNC connector J11 and one end of the resistor R104, the other end of the capacitor C76 is connected to the high-definition video filter chip U113, and the other end of the resistor R104 is grounded; the high-definition video filter chip U113 is connected to the BNC connector J10 through the resistor R125.

9. The converter for converting high-definition analog video signals to HDMI signals according to claim 8, characterized in that: The BNC output module also includes a varistor RV100, a capacitor C124 and a capacitor C123, one end of the varistor RV100 is connected to the BNC connector J10, and the other end is grounded; the high-definition video filter chip U113 is connected to the power supply end through the capacitor C124 and the capacitor C123 respectively, and the capacitor C124 and the capacitor C123 have different capacitance values.

10. The converter for converting high-definition analog video signals to HDMI signals according to claim 7, characterized in that: The BNC input module also includes a resistor R87 and an ESD protection diode ESD14; one end of the resistor R87 is grounded, and the other end is connected to the BNC connector J11; one end of the ESD protection diode ESD14 is grounded, and the other end is connected to the BNC connector J11.

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