TW202404373A - Capture device and method - Google Patents

Abstract

A capture device and method are provided. The capture device determines whether an application can identify a custom command set. When determining that the application can identify the custom command set, the capture device obtains an image information and/or an audio information of an input signal received from a input signal source device through the custom command set. The capture device configures an output setting based on the image information and/or the audio information, and a terminal output description information, and converts the input signal based on the output setting. When determining that the application cannot identify the custom command set, the capturing device generates a new terminal output description information based on the image information and/or the audio information, so as to update the terminal output description information, and executes a reconnection operation with a computer device.

Description

Capturing device and method

The present invention relates to a capture device and method. Specifically, the present invention relates to an acquisition device and method that can reduce the distortion of image signals and sound signals.

In recent years, online live streaming has become more and more popular, and users have higher requirements for image and/or sound quality. Therefore, in order to achieve higher image and/or sound quality, users usually use capture cards to connect input signal source devices (such as game consoles, video players, etc.) and computer devices (such as computer hosts, notebooks, etc.) Computers, tablets, smartphones) processing devices.

However, since there are many different formats of image signals and audio signals, if the input signal of the input signal source device cannot match the performance required by the computer device or application, the image and audio signals may be converted by the capture device. Different degrees of distortion occur. Therefore, if the audio and video input and output combinations are not combined with certain restrictions, the audio and video signals may be distorted to varying degrees during the conversion process of the capture device (for example: when the output resolution is much larger than the input resolution, the conversion may cause blur, Simultaneous conversion of different image aspect ratios may cause image deformation, different audio input sampling rates may cause sound distortion, etc.).

In view of this, how to provide a capture device and method technology that can reduce the distortion of image signals and sound signals is an urgent goal for the industry.

One object of the present invention is to provide a capture device for use in conjunction with a computer device. The capture device includes a receiving interface, a transceiver interface and a processing unit. The receiving interface is electrically connected to an input signal source device to receive an input signal, wherein the receiving interface generates image information and/or sound information of the input signal. The transceiver interface is electrically connected to the computer device, wherein the transceiver interface includes a terminal output description information, the terminal output description information includes a custom command set, and the computer device includes an application program. The processing unit is electrically connected to the receiving interface and the transceiving interface. The processing unit determines whether the application can recognize the custom command set. When it is determined that the application can recognize the custom command set, the processing unit obtains the image information and/or the sound information through the custom command set, and based on the image information and/or the sound information, the terminal outputs description information Configure an output setting and convert the input signal based on the output setting. When it is determined that the application cannot recognize the custom command set, the processing unit generates new terminal output description information based on the image information and/or the sound information to update the terminal output description information and execute the operation with the computer device. One reconnect works.

Another object of the present invention is to provide a capture method for a capture device, the capture device is electrically connected to an input signal source device and a computer device, the capture device includes a transceiver interface , the transceiver interface includes a terminal output description information, the terminal output description information includes a custom command set, the computer device includes an application program, and the retrieval method includes the following steps: determine whether the application program can recognize the custom command set; when it is determined that the application can recognize the custom command set, obtain image information and/or sound information of an input signal received from the input signal source device through the custom command set, based on the image information and /or the sound information and the terminal output description information configure an output setting, convert the input signal based on the output setting; and when it is determined that the application cannot recognize the custom command set, based on the image information and/or the sound information Generate a new terminal output description information, update the terminal output description information, and perform a reconnection operation with the computer device.

Another object of the present invention is to provide a capture method for a capture device, the capture device is electrically connected to an input signal source device and a computer device, the capture device includes a transceiver interface , the transceiver interface includes a terminal output description information, the terminal output description information includes a custom command set, the computer device includes an application program, and the retrieval method includes the following steps: the application program obtains the self-defined command set through the custom command set The input signal source device receives image information and/or audio information of an input signal, configures an output setting based on the image information and/or audio information, and the terminal output description information, and converts the input signal based on the output setting. .

The capture technology (including at least devices and methods) provided by the present invention determines whether the capture device and the computer device have the same custom command set defined for cooperation (that is, whether the application program of the computer device can recognize the custom command set). definition command set) to determine whether the input signal sent to the application requires further conversion. When it is determined that the application program can recognize the custom command set, the input signal is converted based on the original output setting. When it is determined that the application cannot recognize the custom command set, new terminal output description information (such as a new descriptor) is generated based on the image information and the sound information of the input signal by performing a reconnection operation with the computer device , to transmit the new terminal output description information (such as a new descriptor) to the application to configure the new output settings, and convert the input signal based on the new output settings. Through the above operations, the capture technology provided by the present invention solves the problem of image signal and sound signal distortion that may occur in the conventional technology.

The following describes the detailed technology and implementation of the present invention in conjunction with the drawings, so that those with ordinary knowledge in the technical field to which the present invention belongs can understand the technical features of the claimed invention.

The following will explain a capture device and method provided by the present invention through implementation. However, these embodiments are not intended to limit the invention to be implemented in any environment, application or manner as described in these embodiments. Therefore, the description of the embodiments is only for the purpose of explaining the present invention and is not used to limit the scope of the present invention. It should be understood that in the following embodiments and drawings, elements not directly related to the present invention have been omitted and not shown, and the size of each element and the size ratio between elements are only for illustration and are not intended to limit the present invention. range.

The applicable scenario of this embodiment will be described first, and its schematic diagram is depicted in Figure 1 . As shown in Figure 1, in the first embodiment of the present invention, the capture device 1 can be used in conjunction with the signal source device 2 and the computer device 3. The computer device 3 includes an application program, and the capture device 1 can be used through Wired connection or wireless connection is used to connect the input signal source device 2 (for example: game console video, player, etc.) and the computer device 3 (for example: computer host, notebook computer, tablet, smart phone, etc.). In this scenario, the capture device 1 receives an input signal 101 (for example, including an image signal and/or a sound signal) from the signal source device 2, and then the capture device 1 converts the input signal 101 to the data required by the computer device 3. Output the setting and transmit the converted input signal 101') to the computer device 3.

Generally speaking, when the capture device 1 is used in conjunction with the computer device 3, the computer device 3 can communicate with the capture device 1 through its application program, transmit commands, etc., and subsequently control the capture device 1, for example, through an application. The program transmits commands to control the output settings of the capture device 1, or perform image conversion, etc.

The first embodiment of the present invention is a capture device 1, the schematic structural diagram of which is depicted in Figure 1. The capture device 1 includes a receiving interface 10, a transceiving interface 11, and a processing unit 12. The processing unit 12 is electrically connected to the receiving interface 10 and the transceiving interface 11.

The receiving interface 10 is responsible for receiving the input signal, generating, for example, the image or sound signal required by the TTL (Transistor-Transistor Logic) or I2S (Integrated Interchip Sound) backend, and generating image information (such as image format) corresponding to the input signal based on the Related information, image resolution related information, etc.) and/or a sound information (such as sound format related information, sound resolution related information, etc.). For example, the receiving interface can be a High Definition Multimedia Interface (HDMI), a Digital Visual Interface (DVI), a Video Graphics Array (Video Graphics Array), etc., and the image format related information can be, for example, It is the data output arrangement of compressed data, original data, RGB, YUY2, NV12, P010, etc. Information related to image resolution can be, for example, resolution (Resolution), frame rate (frame rate), and information related to sound format can be, for example, Whether it is compressed or uncompressed, mono or stereo, the sound resolution related information can be, for example, bit depth, sample rate, etc. The transceiver interface 11 is an interface that can receive and transmit data, such as a Universal Serial Bus (USB) interface, which is used to communicate commands and transmit data with the computer device 3 (USB host), but it is not used for this purpose. limit. In some embodiments, the transceiver interface 11 may receive data from sources such as external devices, external web pages, external applications, etc.

The processing unit 12 includes a processor 13, which may be various processing units, a central processing unit (Central Processing Unit; CPU), a microprocessor or other computing devices. In some embodiments, the processing unit 12 includes an image processor 15, which is responsible for converting the input image, which may include a scaler, a frame rate converter, and a color space converter. converter), high dynamic range (High Dynamic Range; HDR) to standard dynamic range (Standard Dynamic Range; SDR) converter, etc. In some implementations, a bypass function is provided.

In some embodiments, the processing unit 12 includes a sound processor 17, which is responsible for converting the input sound, which may include a sample rate converter. For example, when the input sound is stereo and the sampling rate is 32K or 44.1K (samples/s), it is converted into an output stereo sampling rate of 48K (samples/s) through the sound processor 17 . In some implementations, a bypass function is provided.

In some implementations, the image processor 15 and the sound processor 17 can also be integrated into the processor 13 and implement the same functions through software or hardware. The present invention does not limit the implementation.

For ease of understanding, the operation process of the first embodiment of the present invention will be described below. Please refer to Figure 2 . In Figure 2, the operation process 200 first executes operation OP1, in which the capture device 1 detects the input signal and prepares the terminal to output description information. For example, the capture device 1 is connected to the signal source device 2 and the computer device 3, and starts to detect the input signal. If an input signal from the signal source device 2 is detected, the capture device 1 generates image information (eg, image format-related information, image resolution-related information) and/or audio information (eg, audio format-related information, sound). Resolution related information) and prepare terminal output description information (such as: descriptor). For example, the terminal output description information may be a USB descriptor, including information related to the audio and video signal resolution and format supported by the capture device 1 for output, as well as information related to other descriptors (such as UVC (USB Video Class) extension unit or HID (Human interface device) description information, etc.), in which the UVC extension unit or HID description information contains a custom command set.

Next, operation OP2 is executed, and the capture device 1 determines whether the application program can recognize the custom command set. Specifically, after the application reads the terminal output description information of the capture device 1, it can confirm whether the UVC extension unit (UVC extension unit) or HID descriptor (descriptor) in the terminal output description information exists the same. Define a command set to understand whether this capture device 1 can receive commands from the application (i.e., UVC extension or HID commands) to reply to the image and/or sound information of the input signal and control the internal functions of the capture device 1 ( For example: turning on or off the converter in the image processor 15 or the sound processor 17 as needed). When the application can recognize the custom command (i.e., communicate with the device through any custom UVC expansion unit or HID command describing the information (for example, reading the audio and video information of the input signal)), it means that the capture device 1 can be easily It can be understood that this application is a cooperative application (that is, the capture device 1 is used with the cooperative application). When the application cannot recognize the custom command, it means that the capture device 1 is used with a third-party application, and therefore has different corresponding behaviors. In some embodiments, the processing unit 12 determines the input signal 101' to be sent to the computer device 3 based on determining whether the application program can recognize the custom command.

Then, when the determination result of operation OP2 is yes, operation OP3-1a is executed, and the capture device 1 determines whether reconnection (relink) is not required regardless of the input signal. Specifically, the application can now obtain the image information and/or sound information of the input signal through the capture device 1. At this step, the application can notify the capture device 1 by issuing the UVC extension command or the HID command. No matter how the input signal is captured, the device 1 does not need to perform a USB reconnection action, or the device 1 still needs to initiate a USB reconnection (that is, the USB is disconnected and then reconnected) when the input signal meets certain conditions. event.

Then, when the judgment result of operation OP3-1a is yes, operation OP4-1 is executed, and the application program automatically configures the output settings. For example, when the application can know the image information and/or sound information of the input signal based on the terminal output description information, it can automatically select the appropriate output settings for the capture device 1 accordingly. For example, the application can The output settings are sent to the capture device 1 through the probe/commit mechanism to set the image and/or sound output of the capture device 1 (such as UVC output, UAC (USB Audio Class) output). In some embodiments, the output setting may be automatically selected by the system, or the user may manually select the output setting after the system automatically selects the appropriate output setting.

For example: the current terminal output description information of the capture device 1 can use UVC description information (such as UVC descriptor) and UAC description information (such as UAC descriptor) to describe the image and/or audio signal analysis supported by the capture device 1 Degree and format related information. For example, the description of the UVC descriptor is that the supported UVC output formats are P010, NV12, YUY2, and RGB24, and the supported UVC output resolutions are 4KP30, 1080P60, 720P60, and 480P60, while the description of the UAC descriptor is that the UAC output format is LPCM, Stereo channels, 48K sampling rate. Assuming that the current input signal is image 1080P60 and sound Stereo and 48K, the application will automatically select YUY2 and 1080P60 as UVC output settings and LPCM, Stereo and 48K UAC output settings for capture device 1. According to such input and output combination, the capture device 1 can output signals with less image and sound distortion. If the input signal is switched to image 480P60 and sound to Stereo and 44.1K, the application will automatically select RGB24 and 480P60 as UVC output settings and LPCM, Stereo and 48K UAC output settings for capture device 1.

Next, operation OP5 is executed, and the capture device 1 outputs the input signal based on the configured output setting. Specifically, the capture device 1 performs input signal conversion by the processing unit 12 according to the combination of input and output. For example, the processor 13 controls the operations of the image processor 15 and the sound processor 17, and outputs data through the transceiver interface 11. (ie, the converted input signal, or the input signal that does not require conversion) to the computer device 3. In some embodiments, the image processor 15 and the sound processor 17 can also be integrated into the processor 13 and implement the same functions through software or hardware. In some embodiments, when the processor 13 determines that the application program can recognize the custom command set, the input signal 101 is converted based on the output setting.

Then, when the judgment result of operation OP3-1a is negative, operation OP3-1b is executed. Based on this input signal, it is judged that a reconnection operation needs to be executed when specific conditions are met. If the judgment result of operation OP3-1b is no, continue to execute operation OP4-1. If the judgment result of operation OP3-1b is yes (that is, the specific condition is met), then the operation of OP3-2 is executed.

For example, assuming that the specific condition described in OP3-1a is operated, when the sound sampling rate of the new input signal is no longer 48K and the current terminal output description information (such as UAC descriptor) only supports the output sampling rate of 48K, Capture device 1 will prepare new output description information (such as a new UAC descriptor) based on the current sound sampling rate of the new input signal (such as 32K or 44.1K) and then perform reconnection to allow computer device 3 to read Obtain new terminal output description information (such as new UVC and UAC descriptors) to achieve the same sampling rate of the input signal and the sound output by the capture device 1 without the need for sound signal conversion to achieve the purpose of less distortion of the sound signal. It should be noted that these specific conditions can be preset by the application and then notified to the capture device 1 through other descriptor-related information (such as UVC extension or HID command).

In some embodiments, when the processor 13 determines that the application program can recognize the custom command, the processor 13 further performs the following operations: the processor 13 receives a command from the application program, wherein the command indicates a preset condition (such as : the aforementioned specific conditions). Then, the processor 13 determines that when the input signal 101 meets the preset condition, generates new terminal output description information based on the image information and/or the sound information, and transmits the new terminal output description information to the application. Subsequently, the processor 13 performs a reconnection operation with one of the computer devices 3 to reconfigure the new output settings. Finally, the processor 13 converts the input signal 101 based on the new output settings.

Subsequently, when the judgment result of operation OP2 is no (that is, the application cannot recognize the custom command set) or the judgment result of operation OP3-1b is yes (that is, a reconnection operation needs to be performed when certain conditions are met), execute operation OP3-2 , generating new terminal output description information (descriptor) based on the image information and/or sound information of the input signal.

Specifically, because the capture device 1 cannot receive the UVC extension or HID command issued by the application (that is, the judgment result of operation OP2 is No), the capture device 1 determines that this application is a third-party application, and captures Device 1 needs to change the UVC and UAC descriptor contents of the terminal output description information (such as UVC and UAC descriptors) according to the input signal (based on the image information and/or the sound information) (that is, generate new terminal output description information) , allowing the application program to select a combination of UVC and UAC output settings that can reduce the output signal distortion of the capture device 1 to a small level. In some implementations, when the processor 13 determines that the application cannot recognize the custom command, the processor 13 determines that the application is a third-party application, and the processor 13 needs to determine the input signal (based on the image information and/or the sound information) generates new terminal output description information, and transmits the new terminal output description information to the application program of the computer device 3 to configure a new output setting, and converts the input signal 101 based on the new output setting.

For example: the current terminal output description information of the capture device 1 can use UVC description information (such as UVC descriptor) and UAC description information (such as UAC descriptor) to describe the image and/or audio signal analysis supported by the capture device 1 Degree and format related information. For example, the description of the UVC descriptor is that the UVC output formats are NV12, YUY2, and RGB24 and the supported UVC output resolutions are 4KP30, 1080P60, and 720P60, while the description of the UAC descriptor is that the UAC output format is LPCM, Stereo channels, and 48K sampling rate. Assume that the current input signal is image 1080P60 and audio is Stereo and 48K. Because the capture device 1 may not support the resolution upscaling function, the capture device 1 will update the terminal output description information (such as UVC and UAC descriptors). ) is as follows: The description of the UVC descriptor is that the supported UVC output formats are NV12, YUY2, and RGB24, and the supported UVC output resolutions are 1080P60, 720P, and the description of the UAC descriptor is that the UAC output format is LPCM, Stereo channels, 48K sampling rate.

Next, operation OP3-3 is executed, and the capture device 1 performs a reconnection operation with the computer device 3. Specifically, at this time, the capture device 1 will initiate a USB disconnection and reconnection event, and the computer device 3 will re-read the terminal output description information (updated UVC and UAC descriptors) of the capture device 1 ). In some embodiments, the operation of reconnecting after disconnection is automatically performed through a program. The terminal output description information can describe the image and/or audio signal resolution and format-related information supported by the capture device 1 through UVC description information (such as UVC descriptor) and UAC description information (such as UAC descriptor). In some embodiments, the processor 13 performs the reconnection operation with the computer device 3 .

Next, operation OP4-2 is executed, and the application reconfigures the new output settings based on the new terminal output description information (descriptor). Specifically, the application can now set the image and/or sound output (UVC output and UAC output) of the capture device 1 based on the new terminal output description information read (such as the updated UVC and UAC descriptors). ) (for example: through the probe/commit command). For example: In the case of OP3-2, because the content of the terminal output description information (descriptor) has changed, the description of the UVC descriptor is that the supported UVC output formats are NV12, YUY2, and RGB24, and the supported UVC output resolution It is 1080P60, 720P, and the description of the UAC descriptor is that the UAC output format is LPCM, Stereo channels, and 48K sampling rate. The application will determine YUY2, 1080P60 as UVC output settings and LPCM, Stereo, 48K UAC output settings for capture device 1 based on the options in the terminal output description information (such as descriptor). According to such input and output combination, the capture device 1 can output signals with less image and sound distortion.

Next, operation OP5 is executed, and the capture device 1 outputs the input signal based on the configured output setting (ie, the new output setting).

In some embodiments, the preset condition is that the output setting does not match the image information and the sound information of the input signal 101 .

In some embodiments, the custom command set includes at least one information command, which is used to indicate the image information and the sound information of the input signal 101 received from the input signal source device 2 .

As can be seen from the above description, the capture device 1 provided by the present invention determines whether the capture device and the application program have the same customized command set (that is, whether the application program can recognize the customized command set) to decide to send Whether the input signal to the application requires further conversion. When it is determined that the application program can recognize the custom command set, the input signal is converted based on the original output setting. When it is determined that the application cannot recognize the custom command set, new terminal output description information (such as a new descriptor) is generated based on the image information and the sound information of the input signal by performing a reconnection operation with the computer device , to transmit the new terminal output description information (such as a new descriptor) to the application to configure the new output settings, and convert the input signal based on the new output settings. Through the above operations, the capture technology provided by the present invention solves the problem of image signal and sound signal distortion that may occur in the conventional technology.

The second embodiment of the present invention is a capturing method, the flow chart of which is depicted in Figure 3 . The capture method 300 is suitable for a capture device that is electrically connected to an input signal source device and a computer device, such as the input signal source device 2 and the computer device 3 described in the first embodiment. The capture device includes a receiving interface 10, a transceiving interface 11, and a processing unit 12. The processing unit 12 is electrically connected to the receiving interface 10 and the transceiving interface 11. In some embodiments, the processing unit 12 includes an image processor, a sound processor and a processor, wherein an image processor, a sound processor and a processor can implement the same function through software or hardware. For example, for example, the receiving interface 10, the transceiving interface 11, the image processor 15, the sound processor 17 and the processor 13 described in the first embodiment. The image processor is used to convert an image signal, and the sound processor is used to convert an audio signal. The acquisition method 300 determines the input signal sent to the computer device through steps S301 to S307.

In step S301, the capturing device receives an input signal from the input signal source device. In step S303, the capturing device generates image information and/or audio information of the input signal. In some embodiments, an input signal 101 is received through the receiving interface 10, and image information and/or audio information of the input signal is generated.

Next, in step S305, a terminal output description information (descriptor) is generated by the capture device, and the terminal output description information (descriptor) is sent to the application to configure an output setting, wherein the terminal output description information includes Other descriptor-related information (for example: UVC extension unit or HID description information, etc.), in which the UVC extension unit or HID description information also includes a custom command set. Finally, in step S307, the capture device determines the input signal to be sent to the computer device based on determining whether the application program can recognize the custom command set.

In some embodiments, when it is determined that the application program can recognize the custom command set, the input signal is converted based on the output setting.

In some implementations, when it is determined that the application cannot recognize the custom command set, a new terminal output description information (such as a descriptor) is generated based on the image information and the sound information, and the new terminal output description information (such as a descriptor) is generated. Output description information (eg, a new descriptor) is sent to the application to configure a new output setting and convert the input signal based on the new output setting.

In some embodiments, after transmitting the new terminal output description information (eg, a new descriptor) to the application, the retrieval method 300 further includes the following steps: performing a reconnection operation with the computer device to Reconfigure the new output settings.

In some implementations, when it is determined that the application program can recognize the custom command set, the retrieval method 300 further includes the following steps: receiving a command from the application program, wherein the command indicates a preset condition; When the input signal meets the preset condition, the new terminal output description information (such as a new descriptor) is generated based on the image information and/or the sound information, and the new terminal output description information (such as a descriptor) is transmitted to the application; perform a reconnection operation with the computer device to reconfigure the new output settings; and convert the input signal based on the new output settings.

In some embodiments, the preset condition is that the output setting does not match the image information and the sound information of the input signal.

In some embodiments, the custom command set includes at least one information command, and the information command is used to indicate the image information and the sound information of the input signal received from the input signal source device.

In addition to the above steps, the second embodiment can also perform all operations and steps of the capture device 1 described in the first embodiment, has the same functions, and achieves the same technical effects. Those with ordinary skill in the technical field of the present invention can directly understand how the second embodiment performs these operations and steps based on the above-mentioned first embodiment, has the same functions, and achieves the same technical effects, so no further description is given.

To sum up, the capture technology provided by the present invention (including at least a device and a method) determines whether the capture device and the application program have the same custom command set (that is, whether the application program can recognize the custom command set). set) to determine whether the input signal sent to the computer device requires further conversion. When it is determined that the application program can recognize the custom command set, the input signal is converted based on the original output setting. When it is determined that the application cannot recognize the custom command set, new terminal output description information (such as a descriptor) is generated based on the image information and the sound information of the input signal, and the new terminal output description information (such as a new descriptor) is ) is sent to the application to configure new output settings and convert the input signal based on the new output settings. Through the above operations, the capture technology provided by the present invention solves the problem of image signal and sound signal distortion that may occur in the conventional technology.

The above embodiments are only used to illustrate some implementation aspects of the present invention and to illustrate the technical features of the present invention, but are not intended to limit the scope and scope of the present invention. Any changes or equivalence arrangements that can be easily accomplished by those with ordinary skill in the technical field to which the invention belongs fall within the scope claimed by the invention, and the scope of protection of the rights of the invention shall be subject to the scope of the patent application.

1: Capture device 2: Input signal source device 3: Computer device 10: Receiving interface 11: Sending and receiving interface 12: Processing unit 13: Processor 15:Image processor 17: Sound processor 101:Input signal 101’:Converted input signal 200:Operation process OP1, OP2, OP3-1a, OP3-1b, OP3-2, OP3-3, OP4-1, OP4-2, OP5: Operation 300: Retrieval method S301, S303, S305, S307: steps

Figure 1 is a schematic diagram depicting the structure of a capture device according to the first embodiment; Figure 2 is a schematic diagram depicting the acquisition operation process of the first embodiment; and Figure 3 is a partial flowchart depicting the acquisition method of the second embodiment.

Domestic storage information (please note in order of storage institution, date and number) without Overseas storage information (please note in order of storage country, institution, date, and number) without

300: Retrieval method

S301, S303, S305, S307: steps

Claims (10)

A capture device used in conjunction with a computer device, including: A receiving interface electrically connected to an input signal source device to receive an input signal, wherein the receiving interface generates image information and/or sound information of the input signal; A transceiver interface, wherein the transceiver interface is electrically connected to the computer device, wherein the transceiver interface includes a terminal output description information, the terminal output description information includes a custom command set, and the computer device includes an application program; and A processing unit, electrically connected to the receiving interface and the transceiver interface, for performing the following operations: Determine whether the application can recognize the custom command set; When it is determined that the application can recognize the custom command set, the image information and/or the sound information are obtained through the custom command set, and an output is configured based on the image information and/or the sound information and the terminal output description information. setting, converting the input signal based on the output setting; and When it is determined that the application cannot recognize the custom command set, a new terminal output description information is generated based on the image information and/or the sound information to update the terminal output description information and perform reconnection with one of the computer devices operation. The capture device of claim 1, wherein the transceiver interface is a Universal Serial Bus interface, and the terminal output description information includes an image and/or audio signal resolution and format information supported by the capture device, and An extension unit or description information, wherein the extension unit or description information includes the custom command set. The capture device as described in claim 1, wherein after performing the reconnection operation with the computer device, the processing unit further performs the following operations: The application reconfigures a new output setting based on the new terminal output description information; and The input signal is converted based on the new output settings. The capture device as described in claim 1, wherein when it is determined that the application can recognize the custom command set, the processing unit further performs the following operations: receive a command from the computer device, wherein the command indicates a preset condition; Determine when the input signal meets the preset condition, generate the new terminal output description information based on the image information and/or the sound information to update the terminal output description information; Perform a reconnection operation with the computer device to configure a new output setting based on the new terminal output description information; and The input signal is converted based on the new output settings. A capture method for a capture device, the capture device is electrically connected to an input signal source device and a computer device, the capture device includes a transceiver interface, the transceiver interface includes a terminal output description information, the The terminal output description information includes a custom command set, the computer device includes an application, and the retrieval method includes the following steps: Determine whether the application can recognize the custom command set; When it is determined that the application can recognize the custom command set, image information and/or sound information of an input signal received from the input signal source device is obtained through the custom command set, based on the image information and/or The sound information and the terminal output description information configure an output setting, and the input signal is converted based on the output setting; and When it is determined that the application cannot recognize the custom command set, a new terminal output description information is generated based on the image information and/or the sound information to update the terminal output description information and perform reconnection with one of the computer devices operation. The capture method of claim 5, wherein the transceiver interface is a Universal Serial Bus interface, and the terminal output description information includes an image and/or audio signal resolution and format information supported by the capture device, and An extension unit or description information, wherein the extension unit or description information includes the custom command set. The retrieval method described in request item 5, wherein when it is determined that the application can recognize the custom command set, the retrieval method further includes the following steps: Receive a command from the application, where the command indicates a preset condition; Determine when the input signal meets the preset condition, generate the new terminal output description information based on the image information and/or the sound information to update the terminal output description information; Perform a reconnection operation with the computer device to configure a new output setting based on the new terminal output description information; and The input signal is converted based on the new output settings. The retrieval method as described in claim 5, wherein after performing the reconnection operation with the computer device, the retrieval method further includes the following steps: The application reconfigures a new output setting based on the new terminal output description information; and The input signal is converted based on the new output settings. A capture method for a capture device, the capture device is electrically connected to an input signal source device and a computer device, the capture device includes a transceiver interface, the transceiver interface includes a terminal output description information, the The terminal output description information includes a custom command set, the computer device includes an application, and the retrieval method includes the following steps: The application obtains image information and/or audio information of an input signal received from the input signal source device through the custom command set, and configures a terminal output description information based on the image information and/or audio information. Output settings based on which the input signal is converted. The capture method of claim 9, wherein the transceiver interface is a Universal Serial Bus interface, and the terminal output description information includes an image and/or audio signal resolution and format information supported by the capture device, and An extension unit or description information, wherein the extension unit or description information includes the custom command set.