Video processing circuit based on filter driver

Abstract

The utility model relates to the technical field of video images, in particular to a video processing circuit based on a filter driver, which comprises an input signal, an input capacitor, an input power supply, a power supply filter circuit, a video processing circuit, an output matching resistor and an output signal. An input signal passes through an input capacitor, and an input power supply passes through a power supply filter circuit, a video processing circuit and an output matching resistor to generate three paths of output signals; the video processing circuit comprises a 5V power supply, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a chip U1, a resistor R1, a resistor R2, a resistor R3 and a resistor R4. According to the utility model, one-path input and multi-path output are realized, a filtering function is added, the problem of complex design of a peripheral circuit of a common driving circuit is solved, and the design cost and the hardware cost are reduced.

Description

Technical Field

[0001] This utility model relates to the field of new video image technology, and particularly to a video processing circuit based on a filter driver. Background Art

[0002] The existing commonly used video processing circuits have the following disadvantages:

[0003] 1. The existing commonly used video processing circuits can only output images one by one, which limits their use in some cases and restricts the application of videos in special scenarios.

[0004] 2. The existing video processing circuits do not have a filtering function, resulting in poor image output quality. Therefore, designers often have to design complex peripheral filtering circuits, increasing the design cost and hardware cost, which often limits the application in videos.

[0005] 3. The existing video processing circuits do not have the function of converting one input into multiple outputs. In the current situation of the rapid development of video images, such video processing circuits have no development prospects and driving force. Content of the Utility Model

[0006] In view of the above-mentioned disadvantages or deficiencies of the prior art, the present utility model provides a video processing circuit based on a filter driver, which has one input and multiple outputs and adds a filtering function, thus solving the problem of complex design of the peripheral circuit of the ordinary driving circuit and reducing the design cost and hardware cost.

[0007] To achieve the above object, the present utility model is realized through the following technical solutions:

[0008] A video processing circuit based on a filter driver includes: an input signal, an input capacitor, an input power supply, a power supply filtering circuit, a video processing circuit, an output matching resistor, and an output signal;

[0009] The input signal passes through the input capacitor, the input power supply passes through the power supply filtering circuit, and then through the video processing circuit and the output matching resistor to generate three output signals;

[0010] The video processing circuit includes: a 5V power supply, capacitor C1, capacitor C2, capacitor C3, capacitor C4, capacitor C5, chip U1, resistor R1, resistor R2, resistor R3, and resistor R4;

[0011] After capacitors C4 and C5 are connected in series between the 5V power supply and ground, the 5V power supply is then connected to pin 4 of chip U1. The signal input IN is connected to pins 1, 2, and 3 of chip U1 respectively after passing through capacitors C1, C2, and C3. Pin 5 of chip U1 is grounded, and pins 6, 7, and 8 of chip U1 output three signals respectively through resistors R2, R3, and R4.

[0012] Further, chip U1 is of the FMS6143 model.

[0013] The beneficial effects of the present utility model are as follows:

[0014] The present utility model uses fewer components, saves space and cost, improves stability and reliability at the same time, and more importantly, expands the adaptability of the video processing circuit. Therefore, this circuit has stronger adaptability and higher reliability than traditional circuits. Description of the Drawings

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

[0016] Figure 2 is the selection of the analog switch technology of the present utility model;

[0017] Figure 3 is the circuit schematic diagram of the present utility model;

[0018] Figure 4 is the application principle block diagram of the present utility model. Detailed Embodiments

[0019] The following combines the drawings to describe the detailed embodiments of the present utility model in detail, but it should be understood that the protection scope of the present utility model is not limited by the detailed embodiments.

[0020] Unless otherwise clearly stated, throughout the specification and claims, the term "comprising" or its variations such as "including" or "having" etc. will be understood to include the stated elements or components, without excluding other elements or other components.

[0021] As Figure 1 shown, a video processing circuit based on a filter driver includes: an input signal, an input capacitor, an input power supply, a power supply filtering circuit, a video processing circuit, an output matching resistor, and an output signal; the input signal passes through the input capacitor, the input power supply passes through the power supply filtering circuit, and then through the video processing circuit and the output matching resistor to generate three output signals. The three output video signals are the same as one input signal, and the picture is clear.

[0022] The core chip of the video processing circuit is the FMS6143. This chip is a low-cost three-channel fourth-order standard video filter driver, and its main application scenarios include: Cable set-top boxes, Personal Video Recorders (PVR), DVD players, HDTV, Video On Demand (VOD), etc. For the internal functions, please refer to Figure 2 .

[0023] Chip features: 1. Three fourth-order 8MHz (SD) filters;

[0024] 2. Drive a single AC or DC-coupled video load (2Vpp, 150Ω);

[0025] 3. Drive a dual-channel AC or DC-coupled video load (2Vpp, 75Ω) with a third-order passive solution;

[0026] 4. Transparent input clamping;

[0027] 5. AC or DC-coupled input;

[0028] 6. AC or DC-coupled output;

[0029] 7. DC-coupled output eliminates the AC coupling capacitor;

[0030] 8. Only 5V;

[0031] 9. Powerful 8kV ESD protection;

[0032] 10. Lead-free SOIC 8 package.

[0033] As Figure 3 shown, the video processing circuit includes: a 5V power supply, capacitor C1, capacitor C2, capacitor C3, capacitor C4, capacitor C5, chip U1, resistor R1, resistor R2, resistor R3, resistor R4;

[0034] After capacitors C4 and C5 are connected in series between the 5V power supply and ground, the 5V power supply is then connected to pin 4 of chip U1. The signal input IN is connected to pins 1, 2, and 3 of chip U1 respectively after passing through capacitors C1, C2, and C3. Pin 5 of chip U1 is grounded, and pins 6, 7, and 8 of chip U1 output three signals respectively through resistors R2, R3, and R4.

[0035] As Figure 4 shown, after the signal IN is processed by the video processing circuit, three identical signals OUT1, OUT2, and OUT3 are output.

[0036] The device used in the utility model is few, saving space and cost, while improving stability and reliability. More importantly, the adaptability of the video processing circuit is expanded. Therefore, this circuit has stronger adaptability and higher reliability than the traditional circuit.

[0037] The above content is only an embodiment of the utility model. Common knowledge such as the specific structure and characteristics known in the solution is not described in detail here. It is easy for those skilled in the art to understand that the protection scope of the utility model is obviously not limited to these specific implementation manners. Without departing from the premise of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, and these will not affect the implementation effect of the utility model and the practicality of the patent.

Claims

1. A video processing circuit based on a filter driver, characterized in that: include: Input signal, input capacitor, input power supply, power supply filter circuit, video processing circuit, output matching resistor, output signal; The input signal passes through the input capacitor, the input power passes through the power filter circuit, and then passes through the video processing circuit and the output matching resistor to generate three output signals; The video processing circuit includes: a 5V power supply, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a chip U1, a resistor R1, a resistor R2, a resistor R3, and a resistor R4; After capacitors C4 and C5 are connected in series between the 5V power supply and the ground, the 5V power supply is connected to pin 4 of the chip U1. The signal input IN passes through capacitors C1, C2, and C3 and is connected to pins 1, 2, and 3 of the chip U1 respectively. Pin 5 of the chip U1 is grounded. Pins 6, 7, and 8 of the chip U1 output three signals through resistors R2, R3, and R4 respectively.

2. The video processing circuit based on the filter driver according to claim 1, characterized in that: The chip U1 is a FMS6143 chip.

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