Video decoding system

Abstract

The invention discloses a video decoding system. The video decoding system comprises a main control module, a coding and deserializing module and a first power supply module, the first power supply module comprises a power supply chip, a first power supply unit and a first sampling unit, and the power supply chip is connected with the encoding and deserializing module through the first power supply unit and used for supplying power to the encoding and deserializing module. The first sampling unit is electrically connected with the first power supply unit and is used for sampling the power supply voltage of the first power supply unit. And the main control module is electrically connected with the encoding and deserializing module, the first sampling unit and the power supply chip, and is used for controlling the power supply chip or the encoding and deserializing module to stop working according to the sampling information of the first sampling unit. Therefore, the main control module is arranged to sample the power supply voltage of the first power supply unit in the first sampling unit, and controls the power supply chip or the encoding and deserializing module to stop working when the sampling information is abnormal, so that the power supply safety and reliability of the video decoding system are ensured.

Description

Technical Field

[0001] This invention relates to the field of automotive technology, and more particularly to a video decoding system. Background Technology

[0002] With the development of intelligent driving technology and people's increasing demands for in-vehicle comfort, video decoding technology is being increasingly used in automobiles, primarily for the acquisition and conversion of camera data. In intelligent driving ADAS systems, due to the overall vehicle's functional safety requirements, the functional safety design of the video decoding module is becoming increasingly important.

[0003] The existing security design uses chips with the corresponding functional safety level, but the power supply circuit does not have the relevant settings, resulting in poor security of the entire video decoding circuit. Summary of the Invention

[0004] This invention provides a video decoding system that, by setting the main control module to sample the power supply voltage of the first power supply unit in the first sampling unit, controls the power chip or the encoding / decoding module to stop working when the sampling information is abnormal, thus ensuring the safety and reliability of the power supply of the video decoding system.

[0005] In a first aspect, embodiments of the present invention provide a video decoding system. The video decoding system includes a main control module, an encoding / decoding module, and a first power supply module;

[0006] The first power supply module includes a power chip, a first power supply unit, and a first sampling unit. The power chip is connected to the encoding / decoding module through the first power supply unit and is used to supply power to the encoding / decoding module.

[0007] The first sampling unit is electrically connected to the first power supply unit and is used to sample the power supply voltage of the first power supply unit;

[0008] The main control module is electrically connected to the encoding / decoding module, the first sampling unit, and the power chip, respectively, and is used to control the power chip or the encoding / decoding module to stop working based on the sampling information of the first sampling unit.

[0009] Optionally, the video decoding system further includes a power supply network, which includes a first power supply terminal and a second power supply terminal;

[0010] The first power supply unit includes a first ferrite bead and a second ferrite bead;

[0011] The encoding / decoding module includes a first power supply unit and a second power supply unit. The first power supply unit includes a first power supply pin and a second power supply pin. The first power supply pin is electrically connected to the power supply terminal of the power chip through a first ferrite bead, and the second power supply pin is electrically connected to the first power supply terminal.

[0012] The second power supply unit includes a third power supply pin, which is electrically connected to the second power supply terminal. The third power supply pin is also electrically connected to the power supply network through a second ferrite bead.

[0013] Optionally, the first power supply unit further includes a first decoupling capacitor, a second decoupling capacitor, and a third decoupling capacitor;

[0014] The first decoupling capacitor is connected in parallel between the first ferrite bead and the first power supply pin, the second decoupling capacitor is connected in parallel between the second power supply pin and the first power supply pin, and the third decoupling capacitor is connected in parallel between the second power supply pin and the third power supply pin.

[0015] Optionally, the first sampling unit includes a first resistor, a second resistor, a third resistor, a fourth resistor, a first capacitor, and a second capacitor;

[0016] The main control module includes a first sampling interface, a second sampling interface, a first output interface, a second output interface, and a communication interface;

[0017] The first end of the first resistor is electrically connected to the first power supply terminal, the second end of the first resistor is electrically connected to the first end of the second resistor and the first sampling interface, the second end of the second resistor is electrically connected to the ground terminal, the first plate of the first capacitor is electrically connected to the first sampling interface, and the second plate of the second capacitor is electrically connected to the ground terminal.

[0018] The first end of the third resistor is electrically connected to the second power supply end, the second end of the third resistor is electrically connected to the first end of the fourth resistor and the second sampling interface, the second end of the fourth resistor is electrically connected to the ground end, the first plate of the second capacitor is electrically connected to the second sampling interface, and the second plate of the second capacitor is electrically connected to the ground end.

[0019] The first output interface is electrically connected to the enable terminal of the power chip, and the second output interface and the communication interface are both electrically connected to the encoding / decoding module.

[0020] Optionally, the video decoding system may also include a buck-boost module, a power switch module, an anti-reverse module, a voltage detection module, an overcurrent shutdown module, and a camera module;

[0021] The video decoding system includes a third power supply terminal, and the buck-boost module, power switch module, anti-reverse module, voltage detection module, and overcurrent shutdown module are all disposed in the circuit between the third power supply terminal and the camera module;

[0022] The main control module is electrically connected to the power switch module and the voltage detection module respectively, and is used to control the power switch module to stop working according to the sampling information detected by the voltage detection module, so as to disconnect the power output from the third power supply terminal.

[0023] Optionally, the power switch module includes a first switching transistor, a first diode, a first triode, a sixth resistor, a seventh resistor, an eighth resistor, and a ninth resistor;

[0024] The source of the first switching transistor, the first terminal of the first diode, and the first terminal of the seventh resistor are all electrically connected to the output terminal of the buck-boost module. The gate of the first switching transistor is electrically connected to the second terminal of the first diode and the first terminal of the sixth resistor. The second terminals of the sixth resistor and the seventh resistor are electrically connected to the first terminal of the first transistor. The control terminal of the first transistor is electrically connected to the control output pin of the main control module through the eighth resistor. The first terminal of the ninth resistor is electrically connected to the control terminal of the first transistor. The second terminal of the ninth resistor and the second terminal of the first transistor are both electrically connected to the ground terminal.

[0025] Optionally, the anti-reverse module includes a second switching transistor, a second diode, a second transistor, a tenth resistor, an eleventh resistor, a twelfth resistor, and a thirteenth resistor;

[0026] The source of the second switching transistor is electrically connected to the drain of the first switching transistor. The gate of the first switching transistor is electrically connected to the second terminal of the second diode and the first terminal of the tenth resistor. The drain of the second switching transistor is electrically connected to the first terminal of the second diode and the first terminal of the eleventh resistor. The second terminal of the eleventh resistor and the second terminal of the tenth resistor are electrically connected to the first terminal of the second transistor. The control terminal of the second transistor is electrically connected to the first terminal of the twelfth resistor and the first terminal of the thirteenth resistor. The second terminal of the twelfth resistor is electrically connected to the power supply terminal. The second terminal of the thirteenth resistor and the second terminal of the second transistor are both electrically connected to the ground terminal.

[0027] Optionally, the voltage detection module includes a fourteenth resistor, a first amplifier, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, and a first capacitor;

[0028] The first end of the fourteenth resistor is electrically connected to the drain of the second switching transistor and the first end of the fifteenth resistor, respectively, and the second end of the fifteenth resistor is electrically connected to the first input terminal of the first amplifier.

[0029] The second end of the fourteenth resistor is electrically connected to the camera module and the first end of the sixteenth resistor, respectively, and the second end of the sixteenth resistor is electrically connected to the second input end of the first amplifier.

[0030] The first end of the seventeenth resistor is electrically connected to the output terminal of the first amplifier, and the second end of the seventeenth resistor is electrically connected to the second input terminal of the first amplifier.

[0031] The output terminal of the first amplifier is electrically connected to the third sampling interface of the main control module through the eighteenth resistor, and the first capacitor is connected in parallel to the third sampling interface.

[0032] Optionally, the overcurrent shutdown module includes a second amplifier, a third diode, a nineteenth resistor, a twentieth resistor, and a twenty-first resistor;

[0033] The first input terminal of the second amplifier is electrically connected to the first terminal of the eighteenth resistor through the nineteenth resistor. The second input terminal of the second amplifier is electrically connected to the first terminal of the twentieth resistor and the first terminal of the eleventh resistor. The second terminal of the twentieth resistor is electrically connected to the power supply terminal. The second terminal of the eleventh resistor is electrically connected to the ground terminal.

[0034] The output terminal of the second amplifier is electrically connected to the first terminal of the third diode, and the second terminal of the third diode is electrically connected to the second terminal of the eighth resistor.

[0035] Optionally, the second end of the fourteenth resistor is electrically connected to the camera module through a filter circuit.

[0036] The video decoding system provided in this embodiment of the invention includes a main control module, an encoding / decoding module, and a first power supply module. The first power supply module includes a power chip, a first power supply unit, and a first sampling unit. The power chip is connected to the encoding / decoding module through the first power supply unit and is used to supply power to the encoding / decoding module. The first sampling unit is electrically connected to the first power supply unit and is used to sample the power supply voltage of the first power supply unit. The main control module is electrically connected to the encoding / decoding module, the first sampling unit, and the power chip, and is used to control the power chip or the encoding / decoding module to stop working based on the sampling information from the first sampling unit. Thus, by setting the main control module to sample the power supply voltage of the first power supply unit in the first sampling unit, and controlling the power chip or the encoding / decoding module to stop working when abnormal sampling information occurs, the safety and reliability of the power supply to the video decoding system are ensured. Attached Figure Description

[0037] Figure 1 This is a partial structural diagram of a video decoding system provided in an embodiment of the present invention;

[0038] Figure 2 This is a partial structural diagram of another video decoding system provided in an embodiment of the present invention. Detailed Implementation

[0039] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0040] It should be noted that the terms "comprising" and "having" and any variations thereof in the specification, claims and accompanying drawings of this invention are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such processes, methods, products or devices.

[0041] Figure 1 This is a partial structural diagram of a video decoding system provided in an embodiment of the present invention. See also... Figure 1 The video decoding system includes a main control module 10, an encoding / decoding module 20, and a first power supply module 30. The first power supply module 30 includes a power chip 310, a first power supply unit 320, and a first sampling unit 330. The power chip 310 is connected to the encoding / decoding module 20 through the first power supply unit 320 and is used to supply power to the encoding / decoding module 20. The first sampling unit 330 is electrically connected to the first power supply unit 320 and is used to sample the power supply voltage of the first power supply unit 320. The main control module 10 is electrically connected to the encoding / decoding module 20, the first sampling unit 330, and the power chip 310, and is used to control the power chip 310 or the encoding / decoding module 20 to stop working based on the sampling information from the first sampling unit 330.

[0042] Specifically, in this embodiment of the invention, the application of a video decoding system in the field of vehicle technology is used as an example. Specifically, in the field of intelligent driving vehicle technology, the data information collected by the vehicle camera module is converted through the encoding / decoding module in the video decoding system, but this is not a limitation. For example, as shown... Figure 1As shown, the video decoding system includes a main control module 10, an encoding / decoding module 20, and a first power supply module 30. The main control module 10 is the control core of the video decoding system, primarily used for information acquisition (such as receiving signals and data from all parts of the vehicle in real time via the vehicle network and various interfaces), data fusion processing (the main control module has powerful computing capabilities, capable of filtering, cleaning, fusing, parsing, and calculating massive amounts of raw data. For example, fusing camera images, radar data, and map information to construct an accurate perception model of the vehicle's surrounding environment; calculating the vehicle's motion state and position; and interpreting the driver's intentions), and generating control commands (based on input information and the operating control strategy, it can calculate the specific control actions to be executed and generate precise control commands). The encoding / decoding module 20 is used to convert large amounts of parallel data into high-speed serial signals for transmission and to restore the serial signals to parallel data at the receiving end. For example, after the camera module has collected a large amount of data signals, if parallel transmission is used, the wiring harness will become extremely large, bulky, expensive and difficult to lay. Therefore, by setting up the serialization module 20, a large amount of parallel data is converted into high-speed serial signals for transmission, and the serial signals are restored to parallel data at the receiving end. This greatly reduces the number of physical cables required, simplifies the wiring harness design, and reduces vehicle weight and manufacturing costs.

[0043] As vehicle safety requirements increase, the functional safety design of video decoding modules becomes increasingly important. However, current safety measures rely on selecting chips with appropriate functional safety levels while neglecting the safety design of the power supply circuit, resulting in poor overall safety of the video decoding circuit.

[0044] Therefore, in this embodiment of the invention, the first power supply module 30 of the video decoding system includes a power chip 310, a first power supply unit 320, and a first sampling unit 330. The power chip 310 supplies power to the encoding / decoding module 20 through the first power supply unit 320. During power supply, the power chip 30 and the vehicle system's power supply network provide at least one power source to the encoding / decoding module 20. For example, the encoding / decoding module 20 may contain devices with different functions, and these devices have different power supply voltage requirements. Therefore, the power chip 30 and the vehicle system's onboard network can provide one or more power supply networks for the encoding / decoding module 20. Furthermore, the first sampling unit 330 is connected to the first power supply unit 320, enabling the first sampling unit 330 to collect voltage information from one or more power supply networks within the first power supply unit 320. The main control module 10 is electrically connected to the encoding / decoding module 20, the first sampling unit 330, and the power chip 310, respectively. It is used to acquire the voltage information of the first power supply circuit 320 collected by the first sampling unit 330, and compare the voltage information with the voltage information of the pre-stored normal operating range. If the acquired voltage information exceeds the voltage information of the pre-stored normal operating range, it indicates that the power supply of the encoding / decoding module 20 is abnormal. Then, it sends a control signal to the power chip 310 or the encoding / decoding module 20 to control the power chip 310 to stop supplying power or the encoding / decoding module 20 to stop working, thus ensuring the safety and reliability of the power supply of the video decoding system.

[0045] In summary, the video decoding system provided in this embodiment of the invention includes a main control module, an encoding / decoding module, and a first power supply module. The first power supply module includes a power chip, a first power supply unit, and a first sampling unit. The power chip is connected to the encoding / decoding module through the first power supply unit and is used to supply power to the encoding / decoding module. The first sampling unit is electrically connected to the first power supply unit and is used to sample the power supply voltage of the first power supply unit. The main control module is electrically connected to the encoding / decoding module, the first sampling unit, and the power chip, and is used to control the power chip or the encoding / decoding module to stop working based on the sampling information from the first sampling unit. Thus, by setting the main control module to sample the power supply voltage of the first power supply unit in the first sampling unit, and controlling the power chip or the encoding / decoding module to stop working when abnormal sampling information occurs, the safety and reliability of the power supply to the video decoding system are ensured.

[0046] Optionally, based on the above embodiments, see also... Figure 1The video decoding system also includes a power supply network VDD, which includes a first power supply terminal VDD1 and a second power supply terminal VDD2. The first power supply unit 320 includes a first ferrite bead B1 and a second ferrite bead B2. The encoding / decoding module 20 includes a first power supply unit 210 and a second power supply unit 220. The first power supply unit 210 includes a first power supply pin 211 and a second power supply pin 212. The first power supply pin 211 is electrically connected to the power supply terminal of the power chip 310 via the first ferrite bead B1, and the second power supply pin 212 is electrically connected to the first power supply terminal VDD1. The second power supply unit 220 includes a third power supply pin 221, which is electrically connected to the second power supply terminal VDD2 and also electrically connected to the power supply network VDD via the second ferrite bead B2.

[0047] Specifically, such as Figure 1 As shown, the string encoder / deserializer module 20 includes power supply requirements for various functional types, such as I / O power, logic power, and analog power. This embodiment of the invention uses an example where the string encoder / deserializer module 20 includes a first power supply unit 210 and a second power supply unit 220, and the power supply requirements of the first power supply unit 210 and the second power supply unit 220 are the same, such as both the first power supply unit 210 and the second power supply unit 220 using a power supply network (VDD). It should be noted that when both the first power supply unit 210 and the second power supply unit 220 use the same power supply network VDD, in order to avoid power supply interference between the first power supply unit 210 and the second power supply unit 220 in the encoding / decoding module 20, the first power supply pin 211 of the first power supply unit 210 is electrically connected to the power supply terminal of the power chip 310 through the first ferrite bead B1, and the third power supply pin 221 of the second power supply unit 220 is electrically connected to the power supply network VDD through the second ferrite bead B2. In this way, the isolation between the first power supply unit 210 and the second power supply unit 220 is achieved through the first ferrite bead B1 and the second ferrite bead B2, which further improves the safety and reliability of the power supply of the video decoding system.

[0048] In addition, see also Figure 1 The first power supply unit 320 also includes a first decoupling capacitor C1, a second decoupling capacitor C2, and a third decoupling capacitor C3. The first decoupling capacitor C1 is connected in parallel between the first ferrite bead B1 and the first power supply pin 211, the second decoupling capacitor C2 is connected in parallel between the second power supply pin 212 and the first power supply terminal VDD1, and the third decoupling capacitor C3 is connected in parallel between the second power supply terminal VDD2 and the third power supply pin 221.

[0049] Specifically, the first plate of the first decoupling capacitor C1 is electrically connected to the first ferrite bead B1 and the first power supply pin 211, and the second plate of the first decoupling capacitor C1 is electrically connected to the ground terminal GND. The first plate of the second decoupling capacitor C2 is electrically connected to the first power supply terminal VDD1 and the second power supply pin 212, and the second plate of the second decoupling capacitor C2 is electrically connected to the ground terminal GND. The first plate of the third decoupling capacitor C3 is electrically connected to the second ferrite bead B2 and the third power supply pin 221, and the second plate of the third decoupling capacitor C3 is electrically connected to the ground terminal GND. In this way, when different power supply pins use the same power supply terminal, placing decoupling capacitors near the power supply pins reduces the interference of power supply noise on sensitive circuits and suppresses the propagation of switching noise through the power network.

[0050] Optional, see below Figure 1 The first sampling unit 330 includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first capacitor C4, and a second capacitor C5. The main control module 10 includes a first sampling interface 110, a second sampling interface 120, a first output interface 130, a second output interface 140, and a communication interface 150. The first end of the first resistor R1 is electrically connected to the first power supply terminal VDD1, the second end of the first resistor R1 is electrically connected to the first end of the second resistor R2 and the first sampling interface 110, the second end of the second resistor R2 is electrically connected to the ground terminal GND, the first plate of the first capacitor C4 is electrically connected to the first sampling interface 110, and the second plate of the first capacitor C4 is electrically connected to the ground terminal GND. The first end of the third resistor R3 is electrically connected to the second power supply terminal VDD2. The second end of the third resistor R3 is electrically connected to the first end of the fourth resistor R4 and the second sampling interface 120. The second end of the fourth resistor R4 is electrically connected to the ground terminal GND. The first plate of the second capacitor C5 is electrically connected to the second sampling interface 120, and the second plate of the second capacitor C5 is electrically connected to the ground terminal GND. The first output interface 130 is electrically connected to the enable terminal of the power chip 310. The second output interface 140 and the communication interface 150 are both electrically connected to the encoding / decoding module 20.

[0051] Specifically, such as Figure 1As shown, the first sampling unit 330 includes a first resistor R1, a second resistor R2, and a first capacitor C4. The first end of the first resistor R1 is electrically connected to the first power supply terminal VDD1, the second end of the first resistor R1 is electrically connected to the first end of the second resistor R2 and the first sampling interface 110, the second end of the second resistor R2 is electrically connected to the ground terminal GND, the first plate of the first capacitor C4 is electrically connected to the first sampling interface 110, and the second plate of the first capacitor C4 is electrically connected to the ground terminal GND. Thus, the voltage of the first power supply VDD1 is sampled by the sampling circuit consisting of the first resistor R1, the second resistor R2, and the first capacitor C4, and the collected voltage information is transmitted to the main control module 10 through the first sampling interface 110. The main control module 10 compares the voltage information of the first power supply VDD1 with the voltage information within the normal range. If the voltage information of the first power supply VDD1 exceeds the voltage information within the normal range, it indicates that the power supply of the first power supply VDD1 is abnormal. Then, a control signal is sent to the enable terminal of the power chip 310 through the first output interface 130 to control the power chip 310 to stop working, or a control command is sent to the encoding / decoding module 20 through the second output interface 140 and the communication interface 150 to shut down the internal circuit of the encoding / decoding module 20.

[0052] Similarly, the first end of the third resistor R3 is electrically connected to the second power supply terminal VDD2, the second end of the third resistor R3 is electrically connected to the first end of the fourth resistor R4 and the second sampling interface 120, the second end of the fourth resistor R4 is electrically connected to the ground terminal GND, the first plate of the second capacitor C5 is electrically connected to the second sampling interface 120, and the second plate of the second capacitor C5 is electrically connected to the ground terminal GND. Thus, the sampling circuit consisting of the third resistor R3, the fourth resistor R4, and the second capacitor C5 samples the voltage of the second power supply VDD2, and transmits the collected voltage information to the main control module 10 through the second sampling interface 120. The main control module 10 compares the voltage information of the second power supply VDD2 with the voltage information within the normal range. If the voltage information of the second power supply VDD2 exceeds the voltage information within the normal range, it indicates that the power supply of the second power supply VDD2 is abnormal. Then, a control signal is sent to the enable terminal of the power chip 310 through the first output interface 130 to control the power chip 310 to stop working, or a control command is sent to the encoding / decoding module 20 through the second output interface 140 and the communication interface 150 to shut down the internal circuit of the encoding / decoding module 20.

[0053] Optionally, based on the above embodiments, Figure 2 This is a partial structural diagram of another video decoding system provided in an embodiment of the present invention. See also... Figure 2The video decoding system also includes a buck-boost module 40, a power switch module 50, a reverse polarity protection module 60, a voltage detection module 70, an overcurrent shutdown module 80, and a camera module 90. The video decoding system includes a third power supply terminal VBAT. The buck-boost module 40, power switch module 50, reverse polarity protection module 60, voltage detection module 70, and overcurrent shutdown module 80 are all located in the circuit between the third power supply terminal VBAT and the camera module 90. The input terminal of the buck-boost module 40 is connected to the third power supply terminal VBAT, and the output terminal is connected to the power switch module 50. Since the vehicle's low-voltage battery power supply range is 9–16V, and the camera's power supply range is generally 8–12V, the vehicle's low-voltage battery voltage needs to be converted by the buck-boost module 40 to the voltage range required by the camera. The power voltage output from the third power supply terminal VBAT is converted by the buck-boost module 40 and then output to the power switch module 50. The control terminal of the power switch module 50 is electrically connected to the main control module 10, and its output terminal is electrically connected to the reverse protection module 60. Under the control of the main control module 10, the module 50 is turned on to output the voltage from the buck-boost module 40 to the reverse protection module 60. The reverse protection module 60 is used to prevent damage to the circuit caused by reverse power connection and to prevent current backflow. The voltage detection module 70 is used to detect the current in the path between the camera module 90 and the third power supply terminal VBAT. The overcurrent shutdown module 80 compares the analog signal output by the voltage detection module 70 with a set value and directly shuts off the power switch module 50 in case of overcurrent, achieving a safe shutdown. Furthermore, the main control module 10 is electrically connected to both the power switch module 50 and the voltage detection module 70, and controls the power switch module 50 to stop working based on the sampling information detected by the voltage detection module 70, thereby disconnecting the power output from the third power supply terminal VBAT. Thus, through the dual protection of the overcurrent shutdown module 80 and the main control module, the power supply safety and reliability of the camera module 90 in the video decoding system are further improved.

[0054] Understandably, the camera module 90 is generally powered via POC (Power Over Coaxial, a technology that combines image transmission, control signals, and power supply over a coaxial cable). The third power supply terminal, VBAT, can be output to the camera module 90 by the encoding / decoding module 20.

[0055] It should be noted that the judgment of abnormal power supply of camera module 90 by main control module 10 based on sampling information of voltage detection module 70 is different from the judgment of overcurrent detection by overcurrent shutdown module 80, and they belong to different types of judgment.

[0056] For details, please refer to [link / reference]. Figure 2The power switch module 50 includes a first switching transistor Q1, a first diode D1, a first transistor Q2, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, and a ninth resistor R9. The source of the first switching transistor Q1, the first terminal of the first diode D1, and the first terminal of the seventh resistor R7 are all electrically connected to the output terminal of the buck-boost module 40. The gate of the first switching transistor Q1 is electrically connected to the second terminal of the first diode D1 and the first terminal of the sixth resistor R6. The second terminals of the sixth resistor R6 and the seventh resistor R7 are electrically connected to the first terminal of the first transistor Q2. The control terminal of the first transistor Q3 is electrically connected to the control output pin 160 of the main control module 10 through the eighth resistor R8. The first terminal of the ninth resistor R9 is electrically connected to the control terminal of the first transistor Q2. The second terminal of the ninth resistor R9 and the second terminal of the first transistor Q2 are both electrically connected to the ground terminal GND. Thus, when the main control module 10 detects an abnormal power supply to the camera module 90 based on the sampling information detected by the voltage detection module 70, it outputs a control signal through the control output pin 160 to turn off the first transistor Q2, thereby turning off the first switching transistor Q1 and disconnecting the power switch module 50, thus disconnecting the power supply path to the camera module 90. Conversely, when the main control module 10 detects a normal power supply to the camera module 90 based on the sampling information detected by the voltage detection module 70, it outputs a high level through the control output pin 160 to turn on the first transistor Q2, thereby turning on the first switching transistor Q1. The power supply voltage transmitted by the buck-boost module 40 can then be transmitted to the reverse protection module 60 through the power switch module 50.

[0057] Optionally, based on the above embodiments, see also... Figure 2The reverse polarity protection module 60 includes a second switching transistor Q3, a second diode D2, a second transistor Q4, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, and a thirteenth resistor R13. The source of the second switching transistor Q3 is electrically connected to the drain of the first switching transistor Q1. The gate of the second switching transistor Q3 is electrically connected to the second terminal of the second diode D2 and the first terminal of the tenth resistor R10. The drain of the second switching transistor Q3 is electrically connected to the first terminal of the second diode D2 and the first terminal of the eleventh resistor R11. The second terminals of the eleventh resistor R11 and the tenth resistor R10 are electrically connected to the first terminal of the second transistor Q4. The control terminal of the second transistor Q4 is electrically connected to the first terminals of the twelfth resistor R12 and the thirteenth resistor R13. The second terminal of the twelfth resistor R12 is electrically connected to the power supply terminal. The second terminal of the thirteenth resistor R13 and the second terminal of the second transistor Q4 are both electrically connected to the ground terminal. Specifically, the reverse polarity protection module 60 is used to prevent damage to the circuit caused by reverse power connection. For example, under reverse power connection conditions, the second transistor Q4 is turned off and the second switching transistor Q3 is not turned on, so that the current in the path between the third power supply terminal VBAT and the camera module 90 is 0, thereby achieving the purpose of preventing current backflow under reverse power connection conditions.

[0058] Optional, see below Figure 2The voltage detection module 70 includes a fourteenth resistor R14, a first amplifier U1, a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, an eighteenth resistor R18, and a third capacitor C6. The first terminal of the fourteenth resistor R14 is electrically connected to the drain of the second switching transistor Q3 and the first terminal of the fifteenth resistor R15. The second terminal of the fifteenth resistor R15 is electrically connected to the first input terminal of the first amplifier R1. The second terminal of the fourteenth resistor R14 is electrically connected to the camera module 90 and the first terminal of the sixteenth resistor R16. The second terminal of the sixteenth resistor R16 is electrically connected to the second input terminal of the first amplifier U1. The first terminal of the seventeenth resistor R17 is electrically connected to the output terminal of the first amplifier U1, and the second terminal of the seventeenth resistor R17 is electrically connected to the second input terminal of the first amplifier U1. The output terminal of the first amplifier U1 is electrically connected to the third sampling interface 170 of the main control module 10 through the eighteenth resistor R18. The third capacitor C6 is connected in parallel to the third sampling interface 170. Specifically, the voltage detection module 70 collects the voltage of the fourteenth resistor R4 and amplifies it through the first amplifier U1 to obtain a voltage signal, which is then output to the third sampling interface 170 of the main control module 10 for voltage detection between the camera module 90 and the third power supply terminal VBAT. When a deviation is detected from the normal value, it indicates that the camera module 90 has a power supply abnormality. Subsequently, a control signal is output through the control output pin 160 to control the first transistor Q2 to turn off, which in turn turns off the first switching transistor Q1, thereby controlling the power switch module 50 to disconnect.

[0059] Optional, see below Figure 2 The overcurrent shutdown module 80 includes a second amplifier U2, a third diode D3, a nineteenth resistor R19, a twentieth resistor R20, and a twenty-first resistor R21. The first input terminal of the second amplifier U2 is electrically connected to the first terminal of the eighteenth resistor R18 via the nineteenth resistor R19. The second input terminal of the second amplifier U2 is electrically connected to the first terminals of both the twentieth and twenty-first resistors R21. The second terminal of the twentieth resistor R20 is electrically connected to the power supply terminal, and the second terminal of the twenty-first resistor R21 is electrically connected to the ground terminal. The output terminal of the second amplifier U2 is electrically connected to the first terminal of the third diode D3, and the second terminal of the third diode D3 is electrically connected to the second terminal of the eighth resistor R8.

[0060] Specifically, the analog signal output by the voltage detection module 70 is compared with a set value by the second amplifier U2. Under normal operating conditions, if the analog signal is less than the set value, the second amplifier U2 outputs a high level, which does not affect the operation of the power switch module 50. Under overcurrent conditions, the second amplifier U2 outputs a low level, controlling the first transistor Q2 and the first switching transistor Q1 to turn off, directly controlling the power switch module 50 to turn off its output through a hardware path, thus achieving the purpose of safe shutdown.

[0061] Optional, see below Figure 1 The second terminal of the fourteenth resistor R14 is electrically connected to the camera module 90 through the filter circuit 100. Specifically, the filter circuit 100 can be a POC filter circuit. The power supply voltage output from the third power supply terminal VBAT reaches the camera module 90 through the power switch module 50, the reverse protection module 60, the current detection module 70, and the filter circuit 100 to power the camera module 90.

[0062] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A video decoding system, characterized in that, The video decoding system includes a main control module, an encoding / decoding module, and a first power supply module; The first power supply module includes a power chip, a first power supply unit, and a first sampling unit. The power chip is connected to the encoding / decoding module through the first power supply unit and is used to supply power to the encoding / decoding module. The first sampling unit is electrically connected to the first power supply unit and is used to sample the power supply voltage of the first power supply unit; The main control module is electrically connected to the encoding / decoding module, the first sampling unit, and the power chip, respectively, and is used to control the power chip or the encoding / decoding module to stop working based on the sampling information of the first sampling unit.

2. The video decoding system according to claim 1, characterized in that, The video decoding system also includes a power supply network, which includes a first power supply terminal and a second power supply terminal. The first power supply unit includes a first ferrite bead and a second ferrite bead; The encoding / decoding module includes a first power supply unit and a second power supply unit. The first power supply unit includes a first power supply pin and a second power supply pin. The first power supply pin is electrically connected to the power supply terminal of the power chip through a first ferrite bead, and the second power supply pin is electrically connected to the first power supply terminal. The second power supply unit includes a third power supply pin, which is electrically connected to the second power supply terminal. The third power supply pin is also electrically connected to the power supply network through a second ferrite bead.

3. The video decoding system according to claim 2, characterized in that, The first power supply unit further includes a first decoupling capacitor, a second decoupling capacitor, and a third decoupling capacitor; The first decoupling capacitor is connected in parallel between the first ferrite bead and the first power supply pin, the second decoupling capacitor is connected in parallel between the second power supply pin and the first power supply pin, and the third decoupling capacitor is connected in parallel between the second power supply pin and the third power supply pin.

4. The video decoding system according to claim 2, characterized in that, The first sampling unit includes a first resistor, a second resistor, a third resistor, a fourth resistor, a first capacitor, and a second capacitor; The main control module includes a first sampling interface, a second sampling interface, a first output interface, a second output interface, and a communication interface; The first end of the first resistor is electrically connected to the first power supply terminal, the second end of the first resistor is electrically connected to the first end of the second resistor and the first sampling interface, the second end of the second resistor is electrically connected to the ground terminal, the first plate of the first capacitor is electrically connected to the first sampling interface, and the second plate of the second capacitor is electrically connected to the ground terminal. The first end of the third resistor is electrically connected to the second power supply end, the second end of the third resistor is electrically connected to the first end of the fourth resistor and the second sampling interface, the second end of the fourth resistor is electrically connected to the ground end, the first plate of the second capacitor is electrically connected to the second sampling interface, and the second plate of the second capacitor is electrically connected to the ground end. The first output interface is electrically connected to the enable terminal of the power chip, and the second output interface and the communication interface are both electrically connected to the encoding / decoding module.

5. The video decoding system according to claim 1, characterized in that, The video decoding system also includes a buck-boost module, a power switch module, an anti-reverse module, a voltage detection module, an overcurrent shutdown module, and a camera module; The video decoding system includes a third power supply terminal, and the buck-boost module, power switch module, anti-reverse module, voltage detection module, and overcurrent shutdown module are all disposed in the circuit between the third power supply terminal and the camera module; The main control module is electrically connected to the power switch module and the voltage detection module respectively, and is used to control the power switch module to stop working based on the sampling information detected by the voltage detection module, so as to disconnect the power output from the third power supply terminal.

6. The video decoding system according to claim 5, characterized in that, The power switch module includes a first switching transistor, a first diode, a first triode, a sixth resistor, a seventh resistor, an eighth resistor, and a ninth resistor; The source of the first switching transistor, the first terminal of the first diode, and the first terminal of the seventh resistor are all electrically connected to the output terminal of the buck-boost module. The gate of the first switching transistor is electrically connected to the second terminal of the first diode and the first terminal of the sixth resistor. The second terminals of the sixth resistor and the seventh resistor are electrically connected to the first terminal of the first transistor. The control terminal of the first transistor is electrically connected to the control output pin of the main control module through the eighth resistor. The first terminal of the ninth resistor is electrically connected to the control terminal of the first transistor. The second terminal of the ninth resistor and the second terminal of the first transistor are both electrically connected to the ground terminal.

7. The video decoding system according to claim 6, characterized in that, The anti-reverse module includes a second switching transistor, a second diode, a second transistor, a tenth resistor, an eleventh resistor, a twelfth resistor, and a thirteenth resistor; The source of the second switching transistor is electrically connected to the drain of the first switching transistor. The gate of the second switching transistor is electrically connected to the second terminal of the second diode and the first terminal of the tenth resistor. The drain of the second switching transistor is electrically connected to the first terminal of the second diode and the first terminal of the eleventh resistor. The second terminal of the eleventh resistor and the second terminal of the tenth resistor are electrically connected to the first terminal of the second transistor. The control terminal of the second transistor is electrically connected to the first terminal of the twelfth resistor and the first terminal of the thirteenth resistor. The second terminal of the twelfth resistor is electrically connected to the power supply terminal. The second terminal of the thirteenth resistor and the second terminal of the second transistor are both electrically connected to the ground terminal.

8. The video decoding system according to claim 7, characterized in that, The voltage detection module includes a fourteenth resistor, a first amplifier, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, and a third capacitor; The first end of the fourteenth resistor is electrically connected to the drain of the second switching transistor and the first end of the fifteenth resistor, respectively, and the second end of the fifteenth resistor is electrically connected to the first input terminal of the first amplifier. The second end of the fourteenth resistor is electrically connected to the camera module and the first end of the sixteenth resistor, respectively, and the second end of the sixteenth resistor is electrically connected to the second input end of the first amplifier. The first end of the seventeenth resistor is electrically connected to the output terminal of the first amplifier, and the second end of the seventeenth resistor is electrically connected to the second input terminal of the first amplifier. The output terminal of the first amplifier is electrically connected to the third sampling interface of the main control module through the eighteenth resistor, and the third capacitor is connected in parallel to the third sampling interface.

9. The video decoding system according to claim 8, characterized in that, The overcurrent shutdown module includes a second amplifier, a third diode, a nineteenth resistor, a twentieth resistor, and a twenty-first resistor; The first input terminal of the second amplifier is electrically connected to the first terminal of the eighteenth resistor through the nineteenth resistor. The second input terminal of the second amplifier is electrically connected to the first terminal of the twentieth resistor and the first terminal of the eleventh resistor. The second terminal of the twentieth resistor is electrically connected to the power supply terminal. The second terminal of the eleventh resistor is electrically connected to the ground terminal. The output terminal of the second amplifier is electrically connected to the first terminal of the third diode, and the second terminal of the third diode is electrically connected to the second terminal of the eighth resistor.

10. The video decoding system according to claim 8, characterized in that, The second end of the fourteenth resistor is electrically connected to the camera module through a filter circuit.

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