Novel SDI signal backup switching circuit and electronic equipment

Abstract

The utility model discloses a novel SD (Secure Digital Interface) signal backup switching circuit and electronic equipment, the novel SD signal backup switching circuit comprises an SD input end, an SD output end, a relay module and a first equalizer module, the SD input end is connected with the input end of the relay module; the relay module is at least provided with an output contact pair, wherein one output contact is connected with the SD I output end through the first equalizer module, and the other output contact is connected with the SD I output end through the first equalizer module. According to the novel SD I signal backup switching circuit disclosed by the utility model, the relay module is arranged among the SD I input end, the first equalizer module and the SD I output end, so that physical signal switching and backup are realized when the SD I signal is powered off, the purpose of normally outputting the SD I signal after the circuit is powered off is achieved, the loss and interruption of the signal are avoided, and the reliability of the circuit is improved. Therefore, the power-down switching backup of the SD I signal source is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of SDI signal backup, in particular to a novel SDI signal backup switching circuit and electronic equipment. Background Art

[0002] SDI video signal is a high-speed digital serial signal (hereinafter referred to as SDI signal) which is used to transmit uncompressed digital video signal. SDI video processor processes SDI signal, such as format conversion, image processing, signal delay adjustment, encoding and decoding, image enhancement, etc. SDI video processor outputs the processed SDI signal to SDI display device. In order to avoid signal loss, existing SDI video processors usually set up signal backup system. However, most of the existing signal backup systems are designed for non-power-off abnormal situations such as mechanical and loop failures of equipment, and do not provide signal backup for power-off situations. Therefore, the existing signal backup system needs to be powered on all the time to work properly. When the equipment loses power, the backup system cannot work properly, resulting in signal loss and interruption. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a novel SDI signal backup switching circuit and electronic equipment, wherein the novel SDI signal backup switching circuit comprises an SDI input end, an SDI output end, a relay module, and a first equalizer module, wherein:

[0004] The SDI input terminal is connected to the relay module input terminal; the relay module is provided with at least one output contact pair, wherein one output contact is connected to the SDI output terminal and the other output contact through the first equalizer module.

[0005] Preferably, the SDI input terminal includes an SDI first input terminal; and two or more SDI output terminals are provided; wherein:

[0006] The SDI first input terminal is connected to the relay module input terminal; the relay module is provided with at least one output contact pair, wherein one output contact is connected to two or more SDI output terminals through the first equalizer module, and the other output contact is connected to at least one of the SDI output terminals.

[0007] Preferably, the SDI input terminals are provided with two or more; the SDI output terminals include an SDI first output terminal; wherein:

[0008] At least one SDI input terminal is connected to the SDI first output terminal through the third equalizer module and the data switching module in sequence;

[0009] At least another SDI input terminal is connected to the input terminal of the relay module; an output contact of the relay module is connected to the first output terminal of the SDI and another output contact of the relay module in sequence through the first equalizer module and the data switching module.

[0010] Preferably, the relay module includes a relay K1, a diode D1, a resistor FB1, a transistor Q1, a resistor R3, a resistor R1 and a resistor R6; wherein:

[0011] The input end of the relay K1 is connected to the SDI input end; an output contact of the relay K1 is connected to another output contact of the relay K1 and the SDI output end through the first equalizer module;

[0012] Relay K1 is provided with two SDI ports; the two SDI ports are respectively connected to the two ends of diode D1;

[0013] The cathode of the diode D1 is connected to the power supply through the resistor FB1;

[0014] The anode of the diode D1 is connected to one end of the resistor R1 and one end of the resistor R6 through the transistor Q1 and the resistor R3 in sequence; the other end of the resistor R1 is connected to the power supply; and the other end of the resistor R6 is grounded.

[0015] Preferably, a second equalizer module is provided between the first equalizer module and the SDI output terminal.

[0016] Preferably, the model of the second equalizer module is GS12190.

[0017] Preferably, a first capacitor is provided between the relay module and the SDI output end; and a second capacitor is provided between the second equalizer module and the SDI output end.

[0018] Preferably, the capacitance value of the first capacitor and the second capacitor is 1 uF.

[0019] Preferably, the model of the relay K1 is HF303.

[0020] The utility model further provides an electronic device, which adopts any of the novel SDI signal backup switching circuits described above.

[0021] The novel SDI signal backup switching circuit provided by the utility model realizes physical signal switching and backup when the SDI signal is powered off by arranging a relay module between the SDI input end, the first equalizer module and the SDI output end, so as to achieve the purpose of realizing normal output of the SDI signal even after the circuit is powered off, avoid signal loss and interruption, and thus realize power-off switching and backup of the SDI signal source. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A block diagram of a novel SDI signal backup switching circuit provided by the utility model;

[0023] Figure 2 This is a block diagram of Embodiment 1 of the present utility model;

[0024] Figure 3 This is a schematic diagram of the connection between the second equalizer module, the first capacitor, and the second capacitor in Example 1;

[0025] Figure 4 This is a block diagram of Embodiment 2 of the present utility model;

[0026] Figure 5 for Figure 2 , Figure 3 Circuit diagram of input and output terminals;

[0027] Figure 6 for Figure 2 , Figure 3 The relay module circuit diagram;

[0028] Figure 7 for Figure 2 , Figure 3 The circuit diagram of the first equalizer module;

[0029] Figure 8 for Figure 2 , Figure 3 The circuit diagram of the second equalizer module;

[0030] Among them: 1A, SDI input terminal; 1A1, SDI first input terminal; 1A2, SDI second input terminal; 1B, SDI output terminal; 1B1, SDI first output terminal; 1B2, SDI second output terminal; 20, relay module; 30, first equalizer module; 40, second equalizer module; 51, first capacitor; 52, second capacitor; 60, data switching module; 70, third equalizer module. DETAILED DESCRIPTION

[0031] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments. However, the following embodiments are only preferred embodiments of the present invention, not all of them. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work all belong to the protection scope of the present invention. The experimental methods in the following embodiments are conventional methods unless otherwise specified. The materials, reagents, etc. used in the following embodiments are all commercially available unless otherwise specified.

[0032] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] The utility model embodiment provides a novel SDI signal backup switching circuit and electronic equipment, wherein the novel SDI signal backup switching circuit comprises an SDI input terminal 1A, an SDI output terminal 1B, a relay module 20, and a first equalizer module 30, wherein:

[0035] The SDI input terminal 1A is connected to the input terminal of the relay module 20; the relay module 20 is provided with at least one output contact pair, one of which is connected to the SDI output terminal 1B through the first equalizer module 30, and the other is connected to the SDI output terminal 1B.

[0036] When implementing it, Figure 1 As shown, the novel SDI signal backup switching circuit includes an SDI input terminal 1A, an SDI output terminal 1B, a relay module 20, and a first equalizer module 30; the SDI input terminal 1A is connected to the input terminal of the relay module 20; the relay module 20 is provided with at least one output contact pair, one of which is connected to the SDI output terminal 1B through the first equalizer module 30, and the other output contact is connected to the SDI output terminal 1B; wherein the first equalizer module 30 includes but is not limited to an equalizer of the GS3590 model. The SDI output terminal is connected to a storage device, a backup device, a display device, and a backup video processor.

[0037] The novel SDI signal backup switching circuit provided by the embodiment of the utility model realizes physical signal switching and backup when the SDI signal is powered off by setting a relay module between the SDI input end, the first equalizer module and the SDI output end, thereby achieving the purpose of realizing normal output of the SDI signal even after the circuit is powered off, avoiding signal loss and interruption, and thus realizing power-off switching and backup of the SDI signal source. Example

[0038] like Figure 2 As shown, the SDI input terminal 1A includes an SDI first input terminal 1A1, and the SDI output terminal 1B includes but is not limited to an SDI first output terminal 1B1 and an SDI second output terminal 1B2; wherein:

[0039] The SDI first input terminal 1A1 is connected to the input terminal of the relay module 20; the relay module 20 has at least one output contact pair, one of which is connected to the SDI first output terminal 1B1 and the SDI second output terminal 1B2 through the first equalizer module 30, and the other output contact is connected to the SDI first output terminal 1B1.

[0040] During normal operation, after the circuit is powered on, the SDI signal is input from the SDI first input terminal 1A1 and transmitted to the first equalizer module 20 through the relay module 20; the signal is respectively transmitted to the SDI first output terminal 1B1 and / or the SDI second output terminal 1B2 through the first equalizer module 20;

[0041] When the circuit loses power, the relay module 20 switches to the normally closed state during power failure, and the input SDI signal is output to the SDI first output terminal 1B1 through another output contact of the relay module 20, ensuring that at least the SDI first output terminal 1B1 has an SDI signal output, so that one SDI signal can be output normally even after the circuit loses power. This embodiment is applicable to the use scenario of one input and multiple outputs. In addition, the normal backup and the power failure backup are linked together through the relay module 20. When the power fails, the relay module 20 automatically switches to the SDI first output terminal 1B1, thereby improving the efficiency of the abnormal power failure backup switching; it can meet the use requirements of application scenarios with high timeliness requirements such as concerts.

[0042] Furthermore, a second equalizer module 40 is provided between the first equalizer module 30 and the SDI output terminal.

[0043] When implementing it, Figure 3As shown, a second equalizer module 40 is provided between the first equalizer module 30 and the first SDI output terminal 1B1; the model of the second equalizer module 40 is GS12190. Since the relay module 20 introduces redundant lines, the SDI signal is reflected, resulting in discontinuous impedance matching of the signal, which leads to a poor eye diagram of the signal and is not compatible with the use of long output distances. In this embodiment, the second equalizer module 40 provided between the first equalizer module 30 and the first SDI output terminal 1B1 performs cable equalization of the SDI signal and increases the driving capability.

[0044] Furthermore, a first capacitor 51 is provided between the relay module 20 and the SDI output terminal 1B; and a second capacitor 52 is provided between the second equalizer module 40 and the SDI output terminal 1B.

[0045] When implementing it, Figure 3 , Figure 5 As shown, a first capacitor 51 (C23) is provided between the relay module 20 and the first SDI output terminal 1B1; a second capacitor 52 (C93) is provided between the second equalizer module 40 and the first SDI output terminal 1B1; the capacitance values ​​of the first capacitor 51 and the second capacitor 52 are 1uF. In this embodiment, by adding a 1uF ceramic capacitor to each of the line intersection ends at the intersection of the output end of the relay module 20 and the output end of the second equalizer module 40, signal reflection is reduced, the signal eye diagram quality reaches the standard, and the SDI transmission distance is increased to 80 meters.

[0046] Further, the relay module 20 includes a relay K1, a diode D1, a resistor FB1, a transistor Q1, a resistor R3, a resistor R1 and a resistor R6; wherein:

[0047] The input terminal of the relay K1 is connected to the SDI input terminal 1A; an output contact of the relay K1 is connected to another output contact of the relay K1 and the SDI output terminal 1B through the first equalizer module 30;

[0048] Relay K1 is provided with two SDI ports; the two SDI ports are respectively connected to the two ends of diode D1;

[0049] The cathode of the diode D1 is connected to the power supply through the resistor FB1;

[0050] The anode of the diode D1 is connected to one end of the resistor R1 and one end of the resistor R6 through the transistor Q1 and the resistor R3 in sequence; the other end of the resistor R1 is connected to the power supply; and the other end of the resistor R6 is grounded.

[0051] When implementing it, Figure 6As shown, the relay module 20 includes a relay K1, a diode D1, a resistor FB1, a transistor Q1, a resistor R3, a resistor R1 and a resistor R6; wherein: the relay K1 is a relay HF303 with a single-ended 75Ω impedance control; the first equalizer module 30 adopts an equalizer U1 of model GS3590 (such as Figure 7 As shown); the second equalizer module 40 adopts the equalizer U2 of model GS12190 (as shown Figure 8 As shown); the SDI input terminal 11, the SDI first output terminal 12, and the SDI second output terminal 13 include but are not limited to terminals, wires, etc. of the BNC4 type;

[0052] like Figure 5 As shown, the first input terminal 1A1 of SDI is SDO - IN - A terminal; SDI first output terminal 1B1 is SDI - OUT1 terminal; SDI second output terminal 1B2 is SDI - OUT2 terminal;

[0053] The 6th pin of relay K1 is connected to SDO - IN - The 20th pin of the relay K1 is connected to SDI through the first capacitor 51; - OUT1 terminal connection, relay K1 pin 14 (SDI - IN1) is connected to the 6th pin of the equalizer U1; the 10-13 pins of the equalizer U1 are connected to the 10-13 pins of the equalizer U2; the 22nd and 23rd pins of the equalizer U1 are connected to the 6th and 7th pins of the equalizer U2; the 27th pin of the equalizer U1 is connected to the SDI - OUT2 terminal connection: equalizer U2's 27th pin 12190 - SDI - OUT1 is connected to SDI through the second capacitor 52. - OUT1 terminal connection;

[0054] Relay K1 has two SDI ports, pin 1 (SDI - A - 5V+), pin 11 (SDI - A -5V-); the first pin of relay K1 is connected to the cathode of diode D1 and one end of resistor FB1; the other end of resistor FB1 is connected to +5V power supply; the 11th pin of relay K1 is connected to the anode of diode D1 and the collector of transistor Q1; the emitter of transistor Q1 is grounded, and the base is connected to one end of resistor R1 and one end of resistor R6 through resistor R3; the other end of resistor R1 is connected to the chip power supply end; the other end of resistor R6 is grounded; through the circuit in this embodiment, it is ensured that relay K1 switches to the chip input end when the circuit board is normally powered on. Example

[0055] like Figure 4 As shown, the SDI input terminal 1A includes but is not limited to an SDI first input terminal 1A1 and an SDI second input terminal 1A2; the SDI output terminal 1B includes an SDI first output terminal 1B1; wherein:

[0056] The SDI first input terminal 1A1 is connected to the SDI first output terminal 1B1 through the third equalizer module 70 and the data switching module 60 in sequence;

[0057] The second SDI input terminal 1A2 is connected to the input terminal of the relay module 20; an output contact of the relay module 20 is connected to the first SDI output terminal 1B1 and another output contact of the relay module 20 through the first equalizer module 30 and the data switching module 60 in sequence. Among them, the relay module can use a HF303 model relay; the first equalizer module 30 and the third equalizer module 70 can both use a GS3590 model equalizer; the data switching module 60 can use an ASW3410 model data switching chip. This embodiment is suitable for SDI signal switching backup scenarios with multiple SDI input ports and one SDI output port.

[0058] Furthermore, a second equalization module 40 is provided between the data switching module 60 and the first SDI output terminal 1B1. The second equalization module 40 may be a GS2988 equalizer.

[0059] The embodiment of the utility model further provides an electronic device, which adopts any of the above-mentioned novel SDI signal backup switching circuits. The electronic device includes but is not limited to a video processor and the like.

[0060] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A novel SDI signal backup switching circuit, characterized in that: It comprises an SDI input terminal (1A), an SDI output terminal (1B), a relay module (20), and a first equalizer module (30), wherein: The SDI input terminal (1A) is connected to the input terminal of the relay module (20); the relay module (20) is provided with at least one output contact pair, one of the output contacts being connected to the SDI output terminal (1B) and the other output contact via the first equalizer module (30).

2. The novel SDI signal backup switching circuit according to claim 1 is characterized in that: The SDI input terminal (1A) comprises an SDI first input terminal (1A1); the SDI output terminal (1B) is provided with two or more; wherein: The SDI first input terminal (1A1) is connected to the input terminal of a relay module (20); the relay module (20) is provided with at least one output contact pair, wherein one output contact is connected to two or more SDI output terminals (1B) via a first equalizer module (30), and the other output contact is connected to at least one of the SDI output terminals (1B).

3. The novel SDI signal backup switching circuit according to claim 1 is characterized in that: The SDI input terminals (1A) are provided with two or more; the SDI output terminals (1B) include a first SDI output terminal (1B1); wherein: At least one SDI input terminal (1A) is connected to the SDI first output terminal (1B1) via a third equalizer module (70) and a data switching module (60) in sequence; At least another SDI input terminal (1A) is connected to the input terminal of the relay module (20); an output contact of the relay module (20) is connected to the SDI first output terminal (1B1) and another output contact of the relay module (20) in sequence through the first equalizer module (30) and the data switching module (60).

4. The novel SDI signal backup switching circuit according to any one of claims 1 to 3, characterized in that: The relay module (20) comprises a relay K1, a diode D1, a resistor FB1, a transistor Q1, a resistor R3, a resistor R1 and a resistor R6; wherein: The input end of the relay K1 is connected to the SDI input end (1A); an output contact of the relay K1 is connected to another output contact of the relay K1 and the SDI output end (1B) through a first equalizer module (30); Relay K1 is provided with two SDI ports; the two SDI ports are respectively connected to the two ends of diode D1; The cathode of the diode D1 is connected to the power supply through the resistor FB1; The anode of the diode D1 is connected to one end of the resistor R1 and one end of the resistor R6 through the transistor Q1 and the resistor R3 in sequence; the other end of the resistor R1 is connected to the power supply; and the other end of the resistor R6 is grounded.

5. The novel SDI signal backup switching circuit according to claim 4 is characterized in that: A second equalizer module (40) is provided between the first equalizer module (30) and the SDI output terminal (1B).

6. The novel SDI signal backup switching circuit according to claim 5 is characterized in that: The model of the second equalizer module (40) is GS12190.

7. The novel SDI signal backup switching circuit according to claim 5 is characterized in that: A first capacitor (51) is provided between the relay module (20) and the SDI output terminal (1B); and a second capacitor (52) is provided between the second equalizer module (40) and the SDI output terminal (1B).

8. The novel SDI signal backup switching circuit according to claim 7 is characterized in that: The capacitance values ​​of the first capacitor (51) and the second capacitor (52) are 1 uF.

9. The novel SDI signal backup switching circuit according to claim 4 is characterized in that: The model of the relay K1 is HF303.

10. An electronic device, characterized in that: A novel SDI signal backup switching circuit as described in any one of claims 1 to 9 is adopted.

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