Identification and pairing method of signal processing system and signal transmission device

Abstract

A method for identifying and pairing a signal transmission device includes: obtaining a setting value of a master identification key of a signal processing device; obtaining a setting value of a slave identification key of a signal transmission device; determining whether at least one of the setting value of the master identification key and the setting value of the slave identification key is equal to an initial value; when determining that the setting value of the master identification key and the setting value of the slave identification key are not equal to the initial value, determining whether the setting value of the master identification key and the setting value of the slave identification key are equal; and when the setting value of the master identification key and the setting value of the slave identification key are not equal, 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.

Description

Technical Field

[0001] The present invention relates to a method for identifying and pairing a signal transmission device and a signal processing system for operating the method. Background Art

[0002] Cables or transmission lines are commonly used signal transmission devices that are coupled between two electronic devices to transmit electrical signals. In order to make existing electronic devices more distinctive, today's 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 outstanding and gain the favor of consumers.

[0003] Under this special design, identification and pairing between electronic devices and cables / transmission lines become important operations. In particular, in order to prevent electronic devices and cables / transmission lines from being maliciously copied by unscrupulous operators in the market while maintaining 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 operating the method are needed. Summary of the invention

[0004] One object of the present invention is to provide an effective identification and pairing signal transmission device to prevent electronic devices and cables / transmission lines from being maliciously copied by unscrupulous operators in the market, while maintaining the convenience of product production, maintenance and inventory management.

[0005] According to one 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 a master identification key. The signal transmission device is coupled to the signal processing device and includes a memory device for storing a slave identification key. In the device identification and pairing process, the processor reads the master identification key from the memory device of the signal processing device to obtain a setting value of the master identification key, and reads the slave identification key from the memory device of the signal transmission device to obtain a setting value of the slave identification key, and the processor determines whether the setting value of the master identification key and the setting value of the slave identification key are equal to an initial value, or whether the setting value of the master identification key and the setting value of the slave identification key are equal. When the processor determines that the setting value of the master identification key is not equal to the setting value of the slave identification key and the setting value of the master identification key and the setting value of the slave identification key are not equal to the initial value, the processor controls 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.

[0006] According to another 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 setting value of a master identification key; reading a memory device of a signal transmission device in a signal processing system to obtain a setting value of a slave identification key; determining whether at least one of the setting value of the master identification key and the setting value of the slave identification key is equal to an initial value; when determining that the setting value of the master identification key and the setting value of the slave identification key are both not equal to the initial value, determining whether the setting value of the master identification key and the setting value of the slave identification key are equal; and when the setting value of the master identification key and the setting value of the slave identification key are not equal, 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] In order to make the above-mentioned purpose and other purposes, features, advantages and embodiments of the present invention more clear and understandable, the following description will be made in conjunction with the accompanying drawings.

[0008] Figure 1 FIG. 4 is a block diagram of a signal processing system according to an embodiment of the present invention.

[0009] Figure 2 It is a flow chart showing a method for identifying and pairing a signal transmission device according to an embodiment of the present invention.

[0010] Explanation of symbols

[0011] 100: Host device

[0012] 110,310: Signal processing device

[0013] 111, 121, 311: Processor

[0014] 112, 210, 312: Memory devices

[0015] 120: Chip device

[0016] 122: Signal processing circuit

[0017] 123: Power module

[0018] 200: Signal transmission device

[0019] 250, 255: Connectors

[0020] 300: Display device

[0021] 320: Display panel

[0022] 321: Panel Installation

[0023] 322: Speaker DETAILED DESCRIPTION

[0024] The technical terms in the following description refer to the conventional terms in the technical field. If some terms are explained or defined in this specification, the interpretation of these terms shall be based on the explanation or definition in this specification.

[0025] Figure 1 1 is a block diagram showing 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 be used as a signal source to output at least one signal (e.g., a power signal, a control signal, a video signal, an image signal, an audio signal, etc.), and 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 TV, a mobile device such as a mobile phone or a tablet computer, a computer device such as a laptop or a desktop computer, a digital video converter box (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, a screen of a separate TV, or an electronic product such as a digital TV.

[0026] The signal transmission device 200 is a pluggable or removable physical device coupled between the host device 100 and the display device 300, and is used to transmit power signals, control signals, current signals, voltage signals, video signals, image signals, audio signals, or any communication signals generated in accordance with any communication protocol between the host device 100 and the display device 300. In one embodiment of the present invention, the signal transmission device 200 may be a cable, and the cable may be a cable implemented in accordance with any existing specifications, such as but not limited to High Definition Multimedia Interface (HDMI) specifications, Universal Serial Bus (USB) specifications, etc., or a cable implemented in accordance with other special specifications (e.g., product specifications defined by the manufacturer or product specifications modified from existing specifications).

[0027] It should be noted that Figure 1The signal transmission device 200 is shown as a line in the simplified signal processing system block diagram. However, the signal transmission device 200 proposed by the present invention is not limited to the shape shown in the figure. For example, the signal transmission device 200 may actually include a plug or connector for connecting the host device 100 and the display device 300, such as a connector 250 and a connector 255, and one or more transmission lines for transmitting signals. In addition, it is worth noting that Figure 1 The drawings are by way of example, wherein the components are not necessarily drawn to scale.

[0028] According to an embodiment of the present invention, the host device 100 may include at least a signal processing device 110 and a chip device 120, such as a system on a chip (SoC). The signal processing device 110 may be, for example but not limited to, a bridge device for performing 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 TV, 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 by wire or wireless means, and after appropriately processing the received signal, provide it to the signal processing device 110 in accordance with an internal communication protocol (such as but not limited to a V-by-One communication protocol, an eDP (Embedded Display Port) communication protocol, or an EPI (Embedded Panel Interface) communication protocol, etc.). The signal processing device 110 can perform signal conversion on the received signal, including 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 in accordance with an external communication protocol (such as but not limited to 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, so 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 similar logic.

[0029] According to one 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 transmission, while the external communication protocol may be designed to be suitable for relatively long-distance and relatively high-speed transmission. More specifically, in an embodiment of the present invention, the total transmission bandwidth achieved in accordance with the external communication protocol may be greater than or equal to the total transmission bandwidth achieved in accordance with the internal communication protocol. Therefore, in one embodiment of the present invention, the number of channels or lanes configured outside the host device 100 and operating in accordance with the external communication protocol may be less than the number of channels or lanes configured inside the host device 100 and operating in accordance with the internal communication protocol. This can effectively reduce the volume of the signal transmission device 200 and achieve a beautiful / simple device effect.

[0030] 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 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 signal, for example, to perform a variety of processing to optimize the image or audio signal. The power module 123 is used to control the overall power system of the host device 100, which may further include power control, power monitoring, and / or power output devices. 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.

[0031] The display device 300 may include at least 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 for performing signal conversion, including communication protocol conversion, on one or more signals provided to or received from the signal transmission device 200. For example, the signal processing device 310 may receive a signal from the signal transmission device 200 in accordance with the aforementioned external communication protocol, and perform signal conversion (including communication protocol conversion) on the received signal, so that the signal can then be transmitted to the display panel 320 in accordance with 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 signal received from the display panel 320 in a similar logic. According to one 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 can be designed to be suitable for relatively short-distance and relatively low-speed transmission, and the external communication protocol can be designed to be suitable for relatively long-distance and relatively high-speed transmission. For the introduction of the internal communication protocol of the display device 300 and the aforementioned external communication protocol, please refer to the relevant paragraphs of the host device 100, which will not be repeated here.

[0032] 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 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 1 Only components related to the present invention are shown. Those skilled in the art will appreciate that the signal processing system, the host device 100 and the display device 300 may include other components not shown. Figure 1 components to implement the required signal processing functions.

[0033] According to an embodiment of the present invention, in addition to the components such as the connector or plug, and the transmission line 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 on any one of the transmission line or the connector or plug end of the signal transmission device 200. As mentioned above, in order to prevent the electronic device and the cable / transmission line from being maliciously copied by unscrupulous operators in the market, while maintaining the convenience of product production, maintenance and inventory management, the present invention proposes a method for effectively identifying and pairing the signal transmission device, in which at least one memory device of the host device 100 and the display device 300, such as the memory device 112 and / or 312, stores an identification key, and the memory device 210 of the signal transmission device 200 also stores an identification key. By determining the current setting value of each identification key, the host device 100 and / or the display device 300 can effectively identify and pair the signal transmission device 200. In order to distinguish, the identification key stored in the memory device of the host device 100 and the display device 300 is named as the master identification key, and the identification key stored in the memory device of the signal transmission device 200 is named as the slave identification key. In addition, since the identification and pairing method of the signal transmission device proposed in the present invention can be implemented in either the signal processing device 110 or the signal processing device 310, in order to make the text concise, the signal processing device will be uniformly referred to as the slave identification key in the following. Figure 1 The signal processing device 110 and / or the signal processing device 310 are shown, and the operation of the “signal processing device” is not limited to any one of the signal processing device 110 and the signal processing device 310 .

[0034] According to an embodiment of the present invention, after the signal processing device detects that the signal transmission device 200 is connected to it, it can start the device identification and pairing process. The signal processing device can detect whether there is any signal transmission device connected to it by actively sending a probe signal, passively detecting according to whether a hardware insertion notification signal is received, or by trying to perform an access operation on the memory device of the signal transmission device, or performing any detection operation.

[0035] In the device identification and pairing process, the processor of the signal processing device, for example, the processor 111, the processor 311, reads the master identification key from the corresponding memory device to obtain the setting value of the master identification key, and reads the slave identification key from the memory device 210 of the signal transmission device 200 to obtain the setting value of the slave identification key. The processor further determines whether the setting value of the master identification key and the setting value of the slave identification key are equal to the initial value. According to one embodiment of the present invention, the initial value may be a specific value, or have a specific pattern to distinguish it from other possible values. In an embodiment of the present invention, in addition to storing the current setting value of the master identification key, the memory device of the signal processing device may also store the initial value for use as a basis for judgment in the subsequent device identification and pairing process.

[0036] In the embodiment of the present invention, the processor 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) through the current setting values ​​of the master identification key and the slave identification key. If so, the processor can control the signal processing device to operate in the normal mode. If not, the processor can control the signal processing device to operate in the restricted mode.

[0037] According to one embodiment of the present invention, the processor can determine whether the setting value of the master identification key and the setting value of the slave identification key are equal to the initial value, or whether the setting value of the master identification key and the setting value of the slave identification key are equal. When the processor determines that the setting value of the master identification key is not equal to the setting value of the slave identification key, and the setting value of the master identification key and the setting value of the slave identification key are not equal to the initial value, it means that the signal transmission device 200 is a signal transmission device that is not allowed to be used in the signal processing system (it can be understood that the signal transmission device is illegal in the signal processing system). At this time, the processor controls the signal processing device to operate in a restricted mode. In the restricted mode, the signal processing device does not output any signal (for example, a power signal, a voltage signal, a video signal, an audio signal, etc.) to the signal transmission device, or ignores any signal from the signal transmission device. That is, the signal processing device does not execute the original communication protocol and signal conversion operation in the restricted mode, so that the signal transmission device cannot be used in the signal processing system. Alternatively, the signal processing device can only output a restricted signal to the signal transmission device in the restricted mode. That is, the signal processing device only performs the original communication protocol and signal conversion operation on certain limited signals in the limited mode. For example, the limited signal can be a low-resolution image signal or a signal for transmitting a warning message. In the limited mode, the 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, whereby the signal processing system can display the warning message or the limited low-resolution image signal through the display device to inform the user that the signal transmission device is a product that is not allowed to be used in the signal processing system.

[0038] Figure 2 1 is a flow chart 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:

[0039] Step S202: Read the memory device of the device in the signal processing system to obtain the setting value of the master identification key. As described above, the signal processing device can be any one of the signal processing device 110 and the signal processing device 310.

[0040] Step S204: Read the memory device of the signal transmission device in the signal processing system to obtain the setting value of the slave identification key. 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 can also be combined into one step.

[0041] Step S206: Determine whether at least one of the setting value of the master identification key and the setting value of the slave identification key is equal to the initial value. If not, it means that both are not equal to the initial value, and execute step S208. If yes, execute step S210.

[0042] Step S208: Determine whether the setting value of the master identification key is equal to the setting value of the slave identification key. That is, determine whether the setting value of the master identification key and the setting value of the slave identification key are both equal to values ​​different from the initial value. If yes, execute step S214. If not, execute step S216.

[0043] Step S210: The processor of the signal processing device generates a predetermined value different from the initial value. In an embodiment of the present invention, the processor may randomly generate a value as the predetermined value, or may generate the predetermined value according to a specific value generation method (e.g., random or pseudo-random), wherein the value generated by the specific value generation method is difficult to predict.

[0044] Step S212: Set the master identification key and the slave identification key according to the predetermined values, so that the set value of the master identification key and the set value of the slave identification key are equal to the predetermined values. In this step, the processor of the signal processing device stores the predetermined values ​​in the corresponding memory devices respectively, so as to update the set value of the master identification key and the set value of the slave identification key respectively. It should be noted that in the embodiment of the present invention, the set value of the master identification key and the set value of the slave identification key can be stored in the corresponding memory devices in different encoding methods, read / write byte sequences or storage address rules respectively, so as to increase the difficulty of cracking the identification key, which will be described in more detail in the following paragraphs.

[0045] Step S214: 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, and an audio signal to the signal transmission device 200, and / or can process at least one of a power signal, a control signal, an image signal, and an audio signal received from the signal transmission device 200. That is, the signal processing device can execute the original communication protocol and signal conversion operation in the normal mode.

[0046] Step S216: Control 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 can only output a restricted signal to the signal transmission device.

[0047] According to an embodiment of the present invention, in step S206, the determination of whether the set value of the master identification key is equal to the initial value or the set value of the slave identification key is equal to the initial value may include the following different scenarios:

[0048] If the setting value of the master identification key and the setting value of the slave identification key are both equal to the initial value, it means that the signal processing device and the signal transmission device 200 are both used for the first time. Since the master identification key and the slave identification key are currently set to initial values ​​with a specific pattern or a specific value, it means that the signal processing device and the signal transmission device 200 are both devices allowed to be used in the signal processing system. Therefore, the processor can continue to execute step S210 and subsequent steps.

[0049] If the setting value of the master identification key is equal to the initial value, and the setting value of the slave identification key is a value different from the initial value, it means that the signal transmission device 200 has been activated, and the signal processing device or the host device 100 or the display device 300 including the signal processing device has been replaced with a new product, for example, it has been replaced with a new product due to a product maintenance operation. At this time, the processor can continue to execute step S210 and subsequent steps to update the setting value of the master identification key and the setting value of the slave identification key. After the setting value is updated, the old device that was originally paired with the signal transmission device 200 can no longer be successfully paired with this signal transmission device 200 and operate normally (if according to Figure 2 The process will enter step S208 and step S216, so that the signal processing device operates in a restricted mode).

[0050] If the setting value of the master identification key is different from the initial value, and the setting value of the slave identification key is equal to the initial value, it means that the signal processing device or the host device 100 or the display device 300 including the signal processing device has been activated, and the signal transmission device 200 has been replaced with a new product. For example, it is replaced with a new product due to a product failure. At this time, the processor can continue to execute step S210 and subsequent steps to update the setting value of the master identification key and the setting value of the slave identification key. After the setting value is updated, the old signal transmission device 200 that was originally paired with the signal processing device can no longer be successfully paired with the signal processing device and operate normally (if according to Figure 2 The process will enter step S208 and step S216, so that the signal processing device operates in a restricted mode).

[0051] In addition, according to an embodiment of the present invention, the execution of step S214 also represents that the signal processing system allows the panel device to be lit. For example, in an embodiment of the present invention, after the signal transmission device is correctly installed in the system and the processor of the signal processing device determines that the signal transmission device is a device allowed to be used in this system in the aforementioned device identification and pairing process, the panel device 321 can be lit. Since the above device identification and pairing process is executed very quickly, after determining 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.

[0052] In an embodiment of the present invention, the setting value of the master identification key and the setting value of the slave identification key can be stored in the corresponding memory device in different encoding methods to increase the difficulty of cracking the identification key. For example, the setting value of the master identification key can be stored in the corresponding memory device in the form of binary code, and the setting value of the slave identification key can be stored in the corresponding memory device in the form of gray code. That is, the setting value of the master identification key and the setting value of the slave identification key (the real setting value) are substantially the same, but the content stored in the corresponding memory device (the disguised setting value) can be different. Since the encoding method is known to the processor of the signal processing device, the processor can perform corresponding decoding operations after reading the setting values ​​of the master identification key and the slave identification key (the disguised setting value), so as to obtain the real setting values ​​of the master identification key and the slave identification key.

[0053] In addition, the number of bits used by the master identification key and the slave identification key may be higher than the threshold to provide a better protection effect. For example, the number of bits used by the master identification key and the slave identification key may exceed 16 bits.

[0054] In addition, when storing or updating the master identification key and the slave identification key, the processor may also use different read / write byte orders (Endianness) to write the setting values ​​corresponding to the master identification key and the slave identification key into the corresponding memory device. For example, the processor may use big-endian to write the setting value of the master identification key into the corresponding memory device, and use little-endian to write the setting value of the slave identification key into the corresponding memory device. Under this operation, the setting value of the master identification key and the setting value of the slave identification key (real setting value) are substantially the same, but the contents stored in the corresponding memory devices (disguised setting value) are different. Since the byte order is known to the processor of the signal processing device, the processor can read the setting values ​​of the master identification key and the slave identification key (disguised setting value) according to the corresponding byte order, so that the real setting values ​​of the master identification key and the slave identification key can be correctly obtained.

[0055] In addition, when storing or updating the master identification key and the slave identification key, the processor may also adopt different storage address rules, for example, storing the bits corresponding to the master identification key and the slave identification key in a discontinuous manner. For example, the processor does not store all the bits of the master identification key and the slave identification key in a continuous address, but divides all the bits of the master identification key and the slave identification key into multiple parts, and selects discontinuous memory addresses according to a specific rule to store the bits of each part. Under this operation, the setting value of the master identification key and the setting value of the slave identification key (the real setting value) are substantially the same, but the content stored in the corresponding memory device (the disguised setting value) is different. Since the selection rule of the memory address is known to the processor of the signal processing device, the processor can read the correct address according to the corresponding rule when reading the setting value (the disguised setting value) of the master identification key and the slave identification key, so that the bits of each part of the master identification key and the slave identification key can be correctly obtained, and the real setting value can be restored according to the obtained bits.

[0056] It should be understood that the aforementioned embodiments are only used to illustrate the method of the present invention to make the setting value of the master identification key and the setting value of the slave identification key (the real setting value) substantially the same, but the contents stored in the corresponding memory devices (the disguised setting value) are different, but the present invention is not limited to this.

[0057] In summary, the signal transmission device identification and pairing method proposed in the present invention and the signal processing system operating the method can effectively identify and pair the signal transmission device to prevent electronic devices and cables / transmission lines from being maliciously copied by unscrupulous operators in the market, while maintaining the convenience of product production, maintenance and inventory management.

[0058] The above descriptions are only preferred embodiments of the present invention, but these embodiments are not intended to limit the content of the present invention. Ordinary technicians in this field can make equal changes and adjustments to the technical solutions of the present invention based on the explicit or implicit contents of the present invention without departing from the concept and scope of the present invention. All these changes and modifications may fall within the scope of patent protection sought by the present invention. In other words, the scope of protection of the present invention shall be based on the scope defined in the claims.

Claims

1. A signal processing system, characterized in that: The signal processing system comprises: A signal processing device comprising: Processor; and a memory device for storing a master identification key; and A signal transmission device, coupled to the signal processing device, includes a memory device for storing a slave identification key, In the device identification and pairing process, the processor reads the master identification key from the memory device of the signal processing device to obtain the setting value of the master identification key, and reads the slave identification key from the memory device of the signal transmission device to obtain the setting value of the slave identification key, and the processor determines whether the setting value of the master identification key and the setting value of the slave identification key are equal to an initial value, or whether the setting value of the master identification key and the setting value of the slave identification key are equal. When the processor determines that the set value of the master identification key is not equal to the set value of the slave identification key and the set value of the master identification key is not equal to the initial value, the processor controls 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.

2. The signal processing system according to claim 1, characterized in that When the processor determines that at least one of the set value of the master identification key and the set value of the slave identification key is equal to the initial value, the processor generates a set value different from the initial value, and sets the master identification key and the slave identification key according to the set value, so that the set value of the master identification key and the set value of the slave identification key are both equal to the set value.

3. The signal processing system according to claim 2, characterized in that After setting the master identification key and the slave identification key according to the predetermined values, the processor further controls the signal processing device to operate in a normal mode, wherein in the normal mode, the signal processing device outputs at least one of a power signal, a control signal, an image signal, and an audio signal to the signal transmission device, or processes at least one of the power signal, the control signal, the image signal, and the audio signal received from the signal transmission device.

4. The signal processing system according to claim 1, wherein: The setting value of the master identification key and the setting value of the slave identification key are stored in different encoding modes, read / write byte sequences or storage address rules.

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 apparatus, and is used to perform 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 identification and pairing method of the signal transmission device includes: Reading a memory device of a signal processing device in the signal processing system to obtain a setting value of the master identification key; Reading a memory device of a signal transmission device in the signal processing system to obtain a setting value of a slave identification key; determining whether at least one of the set value of the master identification key and the set value of the slave identification key is equal to an initial value; When it is determined that the set value of the master identification key and the set value of the slave identification key are not equal to the initial value, determining whether the set value of the master identification key and the set value of the slave identification key are equal; and When the setting value of the master identification key is not equal to the setting value of the slave identification key, 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.

7. The signal transmission device identification and pairing method according to claim 6, characterized in that: The identification and pairing method of the signal transmission device also includes: When it is determined that at least one of the set value of the master identification key and the set value of the slave identification key is equal to the initial value, generating a predetermined value different from the initial value; and The master identification key and the slave identification key are set according to the predetermined value, so that the set value of the master identification key and the set value of the slave identification key are both equal to the predetermined value.

8. The signal transmission device identification and pairing method according to claim 7, characterized in that: The identification and pairing method of the signal transmission device also includes: After the master identification key and the slave identification key are set according to the predetermined values, the signal processing device is controlled to operate in a normal mode. In the normal mode, the signal processing device outputs at least one of a power signal, a control signal, an image signal and an audio signal to the signal transmission device, or processes at least one of the power signal, the control signal, the image signal and the audio signal received from the signal transmission device.

9. The signal transmission device identification and pairing method according to claim 6, characterized in that: The setting value of the master identification key and the setting value of the slave identification key are stored in the corresponding memory device in different encoding modes, read / write byte sequences or storage address rules.

10. The method for identifying and pairing a signal transmission device as described in claim 6, wherein the signal processing device is a bridge device configured in a host device or a display device, used to perform 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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