Method for Identifying and Pairing a Signal Processing System and a Signal Transmission Device

Abstract

A signal processing system includes a signal processing device and a signal transmission device. The signal processing device includes a processor and a memory device storing first information. The signal transmission device includes a memory device storing second information. In the device identification and pairing process, the processor reads the first information and the second information, determines a critical date according to a first date indicated by the first information and a margin, and determines whether a second date indicated by the second information is earlier than the critical date. When the processor determines that the second date is earlier than the critical date, the processor controls the signal processing device to operate in a restricted mode, in which the signal processing device does not output any signal to the signal transmission device or ignores any signal from the signal transmission device, or only outputs a restricted signal to the signal transmission device.

Description

Technical Field

[0001] This invention application is about a method for identifying and pairing a signal transmission device and a signal processing system for implementing this method. Background Art

[0002] A cable or transmission line is a frequently used signal transmission device, which is coupled between two electronic devices to transmit electrical signals. In order to make existing electronic devices more distinctive, current electronic device developers not only improve the functions and performance of electronic devices, but also make corresponding adjustments to the design of cables or transmission lines, so that the performance of the final product can be more prominent and favored by consumers.

[0003] Under this special design, the identification and pairing between an electronic device and a cable / transmission line become important operations. In particular, in order to prevent electronic devices and cables / transmission lines from being maliciously copied by unscrupulous operators (which can be understood as illegal manufacturers / users) in the market, and at the same time maintain the convenience of product production, maintenance, and inventory management, a method for effectively identifying and pairing signal transmission devices, and a signal processing system for implementing this method are needed. Summary of the Invention

[0004] An object of the present invention is to effectively identify and pair signal transmission devices, so as to prevent electronic devices and cables / transmission lines from being maliciously copied by unscrupulous operators in the market, and at the same time maintain the convenience of product production, maintenance, and inventory management.

[0005] According to an embodiment of the present invention, a signal processing system includes a signal processing device and a signal transmission device. The signal processing device includes a processor and a memory device. The memory device stores first information. The signal transmission device is coupled to the signal processing device and includes a memory device that stores second information. In the device identification and pairing process, the processor reads the first information from the memory device of the signal processing device, reads the second information from the memory device of the signal transmission device, determines a critical date according to a first date and a margin indicated by the first information, and determines whether a second date indicated by the second information is earlier than the critical date. When the processor determines that the second date is earlier than the critical date, the processor controls the signal processing device to operate in a limited mode. In the limited mode, the signal processing device does not output any signal to the signal transmission device or ignores any signal from the signal transmission device, or the signal processing device only outputs a limited signal to the signal transmission device.

[0006] According to an embodiment of the present invention, a method for identifying and pairing a signal transmission device includes: reading a memory device of a signal processing device in a signal processing system to obtain a first piece of information; reading a memory device of a signal transmission device in the signal processing system to obtain a second piece of information; determining a critical date according to a first date and a margin indicated by the first piece of information; determining whether a second date indicated by the second piece of information is earlier than the critical date; and when it is determined that the second date is earlier than the critical date, controlling the signal processing device to operate in a restricted mode. In the restricted mode, the signal processing device does not output any signal to the signal transmission device or ignores any signal from the signal transmission device, or the signal processing device only outputs a restricted signal to the signal transmission device. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 FIG. is a block diagram of a signal processing system according to an embodiment of the present invention.

[0008] Figure 2 FIG. is a flowchart of a method for identifying and pairing a signal transmission device according to an embodiment of the present invention.

[0009] SYMBOLS AND DESCRIPTIONS

[0010] 100: Host device

[0011] 110, 310: Signal processing device

[0012] 111, 121, 311: Processor

[0013] 112, 210, 312: Memory device

[0014] 120: Chip device

[0015] 122: Signal processing circuit

[0016] 123: Power supply module

[0017] 200: Signal transmission device

[0018] 250, 255: Connector

[0019] 300: Display device

[0020] 320: Display panel

[0021] 321: Panel device

[0022] 322: Sound device DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] Figure 1It is a block diagram of a signal processing system according to an embodiment of the present invention. The signal processing system may include a host device 100, a signal transmission device 200, and a display device 300. In an embodiment of the present invention, the host device 100 may serve as a signal source for outputting at least one signal (e.g., a power signal, a control signal, a video signal, an image signal, an audio signal, etc.). The display device 300 may receive the signal provided by the host device 100 through the signal transmission device 200. According to an embodiment of the present invention, the host device 100 may be implemented by, for example but not limited to, a host device of a separate television, a mobile device such as a mobile phone or a tablet computer, a computer device such as a laptop computer or a desktop computer, a digital video conversion box (set-top box, abbreviated as STB), or an electronic product such as a Compact Disc (CD) / Digital Versatile Disc (DVD) player. The display device 300 may be implemented by, for example but not limited to, a display panel of a separate television, a screen, or a digital television and other electronic products.

[0024] The signal transmission device 200 is a pluggable or removable physical device coupled between the host device 100 and the display device 300 for transmitting a power signal, a control signal, a current signal, a voltage signal, a video signal, an image signal, an audio signal, or any communication signal generated according to any communication protocol between the host device 100 and the display device 300. In an embodiment of the present invention, the signal transmission device 200 may be a cable, and the cable may be implemented according to any existing specifications, for example but not limited to, a cable implemented according to the High Definition Multimedia Interface (HDMI) specification, the Universal Serial Bus (USB) specification, etc., or a cable implemented according to other special specifications (e.g., product specifications customized by the manufacturer or product specifications modified based on existing specifications).

[0025] It should be noted that Figure 1 For the sake of simplicity, in the block diagram of the signal processing system, although the signal transmission device 200 is represented by a grid block. However, the signal transmission device 200 proposed by the present invention is not limited to the shape or form shown in the figure. For example, the signal transmission device 200 may actually include one or more of a plug or connector for connecting the host device 100 and the display device 300, such as connector 250 and connector 255, and a transmission line for transmitting signals. In addition, it is worth noting that Figure 1 is drawn by way of example, and the components are not necessarily drawn to actual scale.

[0026] According to an embodiment of the present invention, the host device 100 may at least include a signal processing device 110 and a chip device 120, such as, for example, a system on a chip (SoC). The signal processing device 110 may be, for example but not limited to, a bridge device, which is used to perform signal conversion on one or more signals provided to or received from the signal transmission device 200. The chip device 120 may be, for example but not limited to, a host chip of a separate television, which is used as a signal source of the signal processing system. For example, the chip device 120 may obtain a power signal and / or a signal to be played through the display device 300 in a wired or wireless manner, and after appropriately processing the received signal, provide it to the signal processing device 110 according to an internal communication protocol (such as, for example but not limited to, the V-by-One communication protocol or the DP (Display Port) communication protocol, etc.). The signal processing device 110 may perform signal conversion on the received signal, including the conversion of the communication protocol, and provide the processed signal to the signal transmission device 200, so that the signal can be transmitted to the display device 300 through the signal transmission device 200 according to an external communication protocol (such as, for example but not limited to, a standard or modified HDMI or USB, etc.). It should be noted that the signal transmission between the chip device 120, the signal processing device 110, and the signal transmission device 200 can be bidirectional. Therefore, the signal processing device 110 can also perform reverse communication protocol and signal conversion on the signal received from the signal transmission device 200 with a similar logic.

[0027] According to an embodiment of the present invention, the internal communication protocol of the host device 100 and the aforementioned external communication protocol may be different communication protocols. For example, the internal communication protocol may be designed to be suitable for relatively short-distance and relatively low-speed transmissions, while the external communication protocol may be designed to be suitable for relatively long-distance and relatively high-speed transmissions. More specifically, in the embodiment of the present invention, the total transmission bandwidth achieved according to the external communication protocol may be greater than or equal to the total transmission bandwidth achieved according to the internal communication protocol. Therefore, in an embodiment of the present invention, the number of channels or lanes configured outside the host device 100 and operating according to the external communication protocol may be less than the number of channels or lanes configured inside the host device 100 and operating according to the internal communication protocol. This can effectively reduce the volume of the signal transmission device 200 and achieve the effect of device beautification.

[0028] The signal processing device 110 may include a processor 111 and a memory device 112. The processor 111 is used to control the operation of the signal processing device 110, and the memory device 112 is used to store the data required for the operation of the signal processing device 110. The chip device 120 may include a processor 121, a signal processing circuit 122, and a power module 123. The processor 121 is used to control the operation of the chip device 120. The signal processing circuit 122 is used to process the received signals. For example, it performs various processes for optimizing image or audio signals. The power module 123 is used to control the overall power system of the host device 100, and it may further include devices such as power control, power monitoring, and / or power output. It should be noted that, in some embodiments, the processor 111 and / or 121 may be implemented by a general-purpose processor or a microprocessor, and the processor 121 and the signal processing circuit 122 may be integrated into a single processor device.

[0029] The display device 300 may at least include a signal processing device 310 and a display panel 320. The signal processing device 310 may be, for example but not limited to, a bridge device, which is used to perform signal conversion on one or more signals provided to or received from the signal transmission device 200, including the conversion of communication protocols. For example, the signal processing device 310 may receive signals from the signal transmission device 200 according to the aforementioned external communication protocol, and perform signal conversion (including the conversion of communication protocols) on the received signals, so that the signals can then be transmitted to the display panel 320 according to the internal communication protocol. Similarly, the signal transmission between the signal transmission device 200, the signal processing device 310, and the display panel 320 may be bidirectional, so the signal processing device 310 may also perform reverse communication protocol and signal conversion on the signals received from the display panel 320 using a similar logic.

[0030] According to an embodiment of the present invention, the internal communication protocol of the display device 300 and the aforementioned external communication protocol may be different communication protocols. For example, similarly, the internal communication protocol of the display device 300 may be designed to be suitable for relatively short-distance and relatively low-speed transmissions, while the external communication protocol may be designed to be suitable for relatively long-distance and relatively high-speed transmissions. For the introduction of the internal communication protocol of the display device 300 and the aforementioned external communication protocol, reference may be made to the relevant paragraphs of the host device 100, which will not be elaborated here.

[0031] The signal processing device 310 may include a processor 311 and a memory device 312. The processor 311 is used to control the operation of the signal processing device 310, and the memory device 312 is used to store the data required for the operation of the signal processing device 310. The display panel 320 may include a panel device 321 and / or a speaker device 322. It should be noted that Figure 1Only the components relevant to the present invention are shown. Those skilled in the art can understand that the signal processing system, the host device 100, and the display device 300 may include other components not shown in Figure 1 to implement the required signal processing functions.

[0032] According to an embodiment of the present invention, in addition to components such as connectors or plugs and transmission lines for transmitting signals, the signal transmission device 200 may further include a memory device 210. It should be noted that the present invention is not limited to setting the memory device 210 at either the transmission line of the signal transmission device 200 or the connector or plug end. As mentioned above, in order to prevent electronic devices and cables / transmission lines from being maliciously copied by unscrupulous operators in the market and to maintain the convenience of product production, maintenance, and inventory management, the present invention proposes a method for effectively identifying and pairing signal transmission devices. In this method, a memory device of at least one of the host device 100 and the display device 300, for example, the memory device 112 and / or 312, stores date information, and the memory device 210 of the signal transmission device 200 also stores date information. In an embodiment of the present invention, by determining whether the dates indicated by the respective date information are reasonable configurations, the host device 100 and / or the display device 300 can effectively identify and pair with the signal transmission device 200. For the purpose of making a distinction, hereinafter, the date information stored in the memory device of the host device 100 and / or the display device 300 will be named 'first information', and the date information stored in the memory device of the signal transmission device 200 will be named'second information'. In addition, since the method for identifying and pairing the signal transmission device proposed by the present invention can be implemented on either the signal processing device 110 or the signal processing device 310, for the sake of brevity, hereinafter, both will be uniformly referred to as the'signal processing device' Figure 1 the signal processing device 110 and / or the signal processing device 310 shown, and the operation of the'signal processing device' is not limited to either the signal processing device 110 or the signal processing device 310

[0033] According to an embodiment of the present invention, after detecting the connection of the signal transmission device 200, the signal processing device 110 / 310 can start the device identification and pairing process. The signal processing device 110 / 310 can detect whether there is any signal transmission device connected thereto in various ways, such as actively sending a polling signal for detection, passively detecting according to whether a hardware insertion notification signal is received, or by attempting to perform an access operation on the memory device of the signal transmission device, or performing any detection operation.

[0034] In the device identification and pairing process, the processor of the signal processing device 110 / 310, e.g., the processor 111 / 311 reads the first information from the corresponding memory device 112 / 312, and reads the second information from the memory device 210 of the signal transmission device 200. The processor 111 / 311 further determines a critical date according to the first date indicated by the first information and a margin.

[0035] According to an embodiment of the present invention, the margin is an allowed time difference. For example, the margin can be set to one month, or the length of a predetermined number of days. The processor 111 / 311 can push the first date back to an earlier date according to the margin and set it as the critical date. For example, assuming that the first date currently indicated by the first information is February 1, 2021 and the margin is set to one month, the processor 111 / 311 can determine that the critical date is January 1, 2021.

[0036] Next, the processor 111 / 311 can further determine whether the second date indicated by the second information is earlier than the critical date, or determine whether the second date indicated by the second information is later than or equal to the critical date. According to an embodiment of the present invention, the second date must be later than or equal to the first date for the signal transmission device 200 to be determined as a signal transmission device allowed to be used in the signal processing system (it can be understood that it is determined that the signal transmission device is legal in the signal processing system).

[0037] In the embodiment of the present invention, the purpose of applying the margin to the first date corresponding to the host device 100 and / or the display device 300 is to improve the flexibility of determining whether two dates are equal. More specifically, in the embodiment of the present invention, if the second date is different from the first date, but the second date falls within the time interval obtained by adding or subtracting a margin from the first date, the processor 111 / 311 will still determine the second date and the first date to be the same. Continuing with the previous example, assuming that the margin is set to one month and the first date currently indicated by the first information is February 1, 2021, which represents the first date corresponding to the host device 100 and / or the display device 300 as February 1, 2021. At this time, as long as the second date falls within the time interval from January 1, 2021 to March 1, 2021, the processor 111 / 311 will determine the second date and the first date to be the same.

[0038] As described above, in an embodiment of the present invention, the processor 111 / 311 can determine whether the signal transmission device 200 is a signal transmission device allowed to be used in the signal processing system (which can be understood as determining whether the signal transmission device is legal in the signal processing system) by judging whether the second date is later than or equal to the date within the time interval obtained by applying a margin to the first date. If so, the processor 111 / 311 can control the signal processing device to operate in a normal mode. If not, the processor 111 / 311 can control the signal processing device to operate in a restricted mode.

[0039] Therefore, in an embodiment of the present invention, the processor 111 / 311 can simply set the earliest date within a time interval determined according to the first date and this margin as the critical date. For example, the date 2021 / 01 / 01 in the previous example.

[0040] According to an embodiment of the present invention, when the processor 111 / 311 determines that the second date is earlier than the critical date, it means that the second date is not later than or equal to the first date. Therefore, the signal transmission device 200 is determined to be a signal transmission device not allowed to be used in the signal processing system (which can be understood as the signal transmission device is illegal in the signal processing system). At this time, the processor 111 / 311 controls the corresponding signal processing device 110 / 310 to operate in a restricted mode. In the restricted mode, the corresponding signal processing device does not output any signals (such as power signals, voltage signals, video signals, audio signals, etc.) to the signal transmission device, or will ignore any signals from the signal transmission device. That is, the corresponding signal processing device does not execute the original communication protocol and signal conversion operations in the restricted mode, so that the signal transmission device cannot be used in the signal processing system. Or, the corresponding signal processing device can only output a restricted signal to the signal transmission device in the restricted mode. That is, the corresponding signal processing device only executes the original communication protocol and signal conversion operations on certain restricted signals in the restricted mode. For example, the restricted signal can be a low-resolution image signal, or a signal used to transmit a warning message. In the restricted mode, the corresponding signal processing device can only transmit the low-resolution image signal or the warning message to the other end of the signal transmission device through the signal transmission device, so that the signal processing system can display the warning message or the restricted low-resolution image signal through the display device to inform the user that this signal transmission device is a product not allowed to be used in this signal processing system.

[0041] On the other hand, when the processor 111 / 311 determines that the second date is not earlier than the critical date, it means that the second date is later than or equal to the first date. Therefore, the signal transmission device 200 is determined to be allowed to be used as a signal transmission device within the signal processing system. At this time, the processor 111 / 311 controls the corresponding signal processing device 110 / 310 to operate in a normal mode.

[0042] Figure 2 FIG. 4 is a flowchart showing a method for identifying and pairing a signal transmission device according to an embodiment of the present invention. The method for identifying and pairing a signal transmission device may include the following steps:

[0043] Step S202: Read the memory device of a signal processing device within the signal processing system to obtain first information. As described above, the signal processing device may be either the signal processing device 110 or the signal processing device 310.

[0044] Step S204: Read the memory device of a signal transmission device within the signal processing system to obtain second information. It should be noted that the present invention does not limit the execution order of step S202 and step S204, and step S202 and step S204 may also be combined into one step.

[0045] Step S206: Determine a critical date according to the first date indicated by the first information and a margin.

[0046] Step S208: Determine whether the second date indicated by the second information is earlier than the critical date. If so, execute step S210. If not, execute step S212.

[0047] Step S210: Control the signal processing device to operate in a restricted mode. In the restricted mode, the signal processing device does not output any signals to the signal transmission device or ignores any signals from the signal transmission device, or the signal processing device can only output restricted signals to the signal transmission device.

[0048] Step S212: Control the signal processing device to operate in a normal mode. In the normal mode, the signal processing device can output at least one of a power signal, a control signal, an image signal, a video signal, and an audio signal to the signal transmission device 200, and / or can process at least one of the power signal, the control signal, the image signal, the video signal, and the audio signal received from the signal transmission device 200. That is, the signal processing device can execute the original communication protocol and signal conversion operations in the normal mode.

[0049] According to an embodiment of the present invention, the execution of step S212 also represents that the signal processing system allows the panel device to be lit. For example, in an embodiment of the present invention, when the signal transmission device is correctly installed in the system, and after the processor of the signal processing device determines that the signal transmission device is a device allowed to be used in this system during the above-mentioned device identification and pairing process, the panel device 321 can be lit. Since the execution of the above-mentioned device identification and pairing process is very fast, after it is determined that the signal transmission device is a device allowed to be used, the panel device 321 can be immediately lit, so the user experience is not affected.

[0050] According to an embodiment of the present invention, when it is determined that the second date is not earlier than the critical date, the processor 111 / 311 can further update the first information according to the second information. In this update operation, the processor 111 / 311 can update the first date and / or the first information corresponding to the signal processing device 110 / 310 according to the second date corresponding to the signal transmission device 200, so that the first date indicated by the updated first information is the same as the second date. The processor 111 / 311 further stores the updated first information in the memory device 112 / 312 to replace the previously recorded first information.

[0051] According to an embodiment of the present invention, the first date corresponding to the signal processing device 110 / 310 (or, corresponding to the host device 100 or the display device 300) can be a manufacturing date of the signal processing device 110 / 310 (or, the host device 100 or the display device 300), and the second date corresponding to the signal transmission device 200 can be a manufacturing date of the signal transmission device 200. It should be understood that the so-called manufacturing date herein refers to a certain specific information (such as: date number, serial number, batch number, etc.), which can be used to identify the approximate time when the signal processing device / signal transmission device is manufactured. Its representation can be a combination of year / month / week / day / hour / minute / second or other common time units, but not limited thereto. Therefore, the initial first information of the signal processing device 110 / 310 can be set or written into the corresponding memory device when the signal processing device 110 / 310 (or, the host device 100 or the display device 300) is produced or shipped out. Similarly, the second information corresponding to the signal transmission device 200 can be set or written into the corresponding memory device when the signal transmission device 200 is produced or shipped out.

[0052] In an embodiment of the present invention, the first information and the second information may be stored in corresponding memory devices in different coding methods, read / write byte orders, or storage address rules respectively, so as to increase the difficulty for illegal manufacturers / users to identify and obtain the first date and the second date. For example, the first information indicating the first date may be stored in the corresponding memory device in the form of a binary code, while the second information indicating the second date may be stored in the corresponding memory device in the form of a gray code. In particular, after the first information is updated according to the second information, the first date and the second date are substantially the same, but because the first information and the second information may be stored in the corresponding memory devices in different coding methods respectively, the content stored in the corresponding memory devices or the content presented by the memory devices will be different, which can prevent illegal manufacturers / users from easily identifying the meanings of the first information and the second information.

[0053] Since the coding methods are known to the processor of the signal processing device, when the processor reads the first information and the second information, corresponding decoding operations can be performed respectively, so that the first date and the second date can be correctly obtained.

[0054] In addition, in an embodiment of the present invention, the number of bits used to store or record the first information and the second information may also be higher than a threshold to provide a better protection effect. For example, the number of bits used to store or record the first information and the second information may exceed 16 bits.

[0055] In addition, in an embodiment of the present invention, when storing or recording the first information and the second information, the processor may also write the first information and the second information into the corresponding memory devices in different read / write byte orders (Endianness). For example, the processor may store the first information in the corresponding memory device in the big-endian manner and store the second information in the corresponding memory device in the little-endian manner.

[0056] Under this operation, the first date and the second date can also be substantially the same (for example, in the situation where the signal transmission device 200 is allowed to be used or after the first information is updated), but the content stored in the corresponding memory devices or the content presented by the memory devices is different. Since the byte order is known to the processor of the signal processing device, when the processor reads the first information and the second information, it can read them according to the corresponding byte order, so that the first date and the second date can be correctly obtained.

[0057] In addition, when storing or recording the first information and the second information, the processor may also adopt different storage address rules. For example, the bits corresponding to the first information and the second information are stored in a discontinuous manner. For example, the processor does not store all the bits of the first information and the second information at consecutive addresses, but divides all the bits of the first information and the second information into multiple parts, and selects discontinuous memory addresses to store the bits of each part according to a specific rule. Under this operation, it is also possible to achieve that the first date and the second date are substantially the same (for example, in the context where the signal transmission device 200 is allowed to be used or after updating the first information), but the content stored in the corresponding memory device or the content presented by the memory device has different effects. Since the rule for selecting the memory address is known to the processor of the signal processing device, when the processor reads the first information and the second information, it can read the correct address according to the corresponding rule, so that the bits of each part of the first information and the second information can be correctly obtained, and the content of the first information and the second information can be restored based on the obtained bits. However, it is difficult for illegal manufacturers / users to obtain the effective content of the first information and the second information without understanding the rule.

[0058] It should be understood that the foregoing embodiments are only used for illustration, and the method in the present invention where the first date and the second date are substantially the same, but the content stored in the corresponding memory device or the content presented by the memory device is different is not limited thereto.

[0059] In summary, through the method for identifying and pairing the signal transmission device proposed by the present invention and the signal processing system implementing this method, the signal transmission device can be effectively identified and paired to avoid malicious replication of electronic devices and cables / transmission lines by unscrupulous operators in the market, while maintaining the convenience of product production, maintenance, and inventory management.

[0060] The above are only the preferred embodiments of the present invention, and all equivalent changes and modifications made according to the scope of the patent application of the present invention shall fall within the scope of the present invention.

Claims

1. A signal processing system, characterized in that, The signal processing system includes: A signal processing device, including: A processor; and A memory device for storing a first piece of information; and A signal transmission device coupled to the signal processing device, including a memory device for storing a second piece of information, A display device, which is used to receive the signal to be transmitted by the signal transmission system through the signal transmission device, Wherein, in a device identification and pairing process, the processor reads the first piece of information from the memory device of the signal processing device, reads the second piece of information from the memory device of the signal transmission device, determines a critical date according to a first date and a margin indicated by the first piece of information, and judges whether a second date indicated by the second piece of information is earlier than the critical date, When the processor judges that the second date is earlier than the critical date, the processor controls the signal processing device to operate in a restricted mode, Wherein, in the restricted mode, the signal processing device can only transmit low-resolution image signals to the display device at the other end of the signal transmission device through the signal transmission device, whereby the signal processing system can display restricted low-resolution image signals through the display device to inform the user that the signal transmission device is a product not allowed to be used in the signal processing system.

2. The signal processing system according to claim 1, wherein When the processor judges that the second date is not earlier than the critical date, the processor controls the signal processing device to operate in a normal mode and updates the first piece of information according to the second piece of information.

3. The signal processing system according to claim 1, wherein The first date is a manufacturing date of the signal processing device, and the second date is a manufacturing date of the signal transmission device.

4. The signal processing system according to claim 1, wherein The first piece of information and the second piece of information are stored in different coding methods, read / write byte orders or storage address rules respectively.

5. The signal processing system according to claim 1, characterized in that, The signal processing device is a bridge device configured in a host device or a display device for performing signal conversion on one or more signals provided to or received from the signal transmission device, and the signal transmission device is a cable.

6. A method for identifying and pairing a signal transmission device, characterized in that, The method includes: Reading a memory device of a signal processing device in a signal processing system to obtain a first piece of information. The signal processing system further includes a display device, which is used to receive the signal to be transmitted by the signal transmission system through the signal transmission device; Reading a memory device of a signal transmission device in the signal processing system to obtain a second piece of information; Determining a critical date according to a first date and a margin indicated by the first piece of information; Judging whether a second date indicated by the second piece of information is earlier than the critical date; and When judging that the second date is earlier than the critical date, controlling the signal processing device to operate in a restricted mode, In the defined mode, the signal processing device can only transmit a low-resolution video signal to a display device at the other end of the signal transmission device through the signal transmission device. Thus, the signal processing system can display the limited low-resolution video signal through the display device to inform the user that this signal transmission device is a product not allowed to be used in this signal processing system.

7. The identification and pairing method of the signal transmission device according to claim 6, characterized in that, Further included are: When it is determined that the second date is not earlier than the critical date, controlling the signal processing device to operate in a normal mode and updating the first information according to the second information.

8. The identification and pairing method of the signal transmission device according to claim 6, characterized in that The first date is a manufacturing date of the signal processing device, and the second date is a manufacturing date of the signal transmission device.

9. The method for identifying and pairing the signal transmission device according to claim 6, wherein, The first information and the second information are stored in different coding methods, read / write byte orders, or storage address rules respectively.

10. The method for identifying and pairing the signal transmission device according to claim 6, characterized in that, The signal processing device is a bridge device configured in a host device or a display device for performing signal conversion on one or more signals provided to or received from the signal transmission device, and the signal transmission device is a cable.

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