TWI805581B - Video signal conversion device - Google Patents

Abstract

A video signal conversion device includes a frontend interface, a video processing module and a backend interface. The frontend interface receives a video input signal with a first frame rate from a video device. The video processing module outputs a first video output signal with second frame rate. A video receiving device receives the first video output signal and a second video output signal with the first frame rate from the video processing module through backend interface.

Description

video signal converter

This case involves a conversion device, especially a conversion device applied to image signals.

At present, multiple image function applications for image sources have been popularized by users. For example, when users are playing a game console, they would like to store the screen of the game console and live broadcast it to other viewers at the same time. However, due to the limitation of the bandwidth of the live broadcast, in order to allow the audience to watch smoothly, it is necessary to reduce the quality of the picture, such as lowering the resolution. However, the pictures stored in this way are relatively poor, causing troubles for users.

Therefore, it is obvious that the current imaging equipment still has deficiencies regarding the above-mentioned problems, and needs to be improved urgently.

The invention discloses an image signal converting device used together with an image sending device and an image receiving device. The image signal conversion device includes a front-end interface, an image processing module and a back-end interface. The front-end interface is coupled to the image sending device to receive an image input signal from the image sending device, wherein the image input signal conforms to a format of a first frame rate. The image processing module is coupled to the front-end interface. The image processing module outputs a first image output signal according to the image input signal. The first image output signal conforms to a second frame rate format. back The end interface is respectively coupled to the image processing module and the image receiving device, wherein the image receiving device receives a first image output signal and a second image output signal from the image processing module through the back-end interface, wherein the second image output signal A format that conforms to the first frame rate.

Therefore, according to the technical content of this case, an image signal conversion device is provided, so as to be more comprehensively applicable to the problems in the application of multiple image functions.

11, 21, 31, 41, 51: Image signal conversion device

111, 211, 511: front-end interface

311, 411: front-end interface circuit

1112: HDMI splitter

1111:HDMI Receiver

112, 212, 512: image processing module

312: Field Programmable Gate Array Image Processor

412: Image processing hardware circuit

113, 213, 513: backend interface

313, 413: back-end interface circuit

5131: Video bridge controller

12, 22, 32, 42, 52: image sending device

13, 23, 33, 43, 53: image receiving device

14: Another image receiving device

V11, V21, V31, V41, V51: the first video output signal

V12, V22, V32, V42, V52: Second video output signal

M10: Image Metadata

Figure 1 is a schematic diagram of an image signal conversion device based on the first embodiment of this case; Figure 2 is a schematic diagram of an image signal conversion device based on an example of the front-end interface in the first embodiment of this case; Figure 3 is a schematic diagram of an image signal conversion device based on the first embodiment of this case The schematic diagram of the image signal conversion device shown in the second embodiment; Figure 4 is a schematic diagram of the image signal conversion device based on the third embodiment of the case; Figure 5 is the image signal conversion based on the fourth embodiment of the case A schematic diagram of the device; and Figure 6 is a schematic diagram of an image signal conversion device based on the fifth embodiment of the present case.

The following will clearly illustrate the spirit of this case with drawings and detailed descriptions. Anyone with common knowledge in the technical field can change and modify the technology taught in this case after understanding the embodiment of this case. It does not depart from the spirit of this case. Spirit and scope.

The terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limiting of the present case. Singular forms such as "a", "the", "the", "this" and "the", as used herein, also include plural forms.

The terms "first", "second", ..., etc. used herein do not refer to the order or sequence, nor are they used to limit the present case, but are only used to distinguish elements or operations described with the same technical terms. .

As used herein, "coupling" or "connection" can refer to two or more elements or devices that are in direct physical contact with each other, or that are in indirect physical contact with each other, or that two or more elements or devices are in physical contact with each other. Operations or actions can also refer to direct or indirect connections between electrical properties (electricity or electrical signals).

"Includes", "including", "has", "containing" and so on used in this article are all open terms, meaning including but not limited to.

As used herein, "and/or" refers to any or all combinations of the above things.

Regarding the directional terms used herein, such as: up, down, left, right, front or rear, etc., they are only directions referring to the attached drawings. Accordingly, the directional terms used are for illustration and not for limitation of the case.

Regarding the terms (terms) used in this article, unless otherwise specified, generally have the ordinary meaning of each term used in this field, in the content of this case and in the special content. Certain terms used to describe the subject matter are discussed below or elsewhere in this specification to provide those skilled in the art with additional guidance in describing the subject matter.

The "image input signal" and "image output signal" mentioned in this article refer to signals that at least contain image information, and of course they can also be audio-visual signals, and there is no limitation here.

The embodiment of this case discloses an image signal conversion device that can be used together with an image sending device and an image receiving device. The image signal conversion device can include a front-end interface, an image processing module and a back-end interface. The front-end interface is coupled to the image sending device to receive an image input signal from the image sending device, wherein the image input signal conforms to the high dynamic range display format. Hereinafter, "high dynamic range display" is referred to as "HDR" for short. The image processing module is coupled to the front-end interface, and the image processing module outputs a first image output signal according to the image input signal, wherein the first image output signal conforms to the standard range display format. Hereinafter, "Conformity to Standard Range Display" is abbreviated as "SDR". The backend interface is respectively coupled to the image processing module and the image receiving device, wherein the image receiving device receives the first image output signal from the image processing module through the backend interface.

The image sending device can at least send the image input signal in HDR format, for example, it can only send the image input signal in HDR format, or it can send the image input signal in HDR and/or SDR format and/or other formats. The front-end interface can have different designs according to actual needs. For example, the image processing module can receive the image information of the image input signal from the image sending device through the operation of the front-end interface for subsequent processing. The front-end interface can be, for example, a front-end interface circuit. In addition, the front-end interface may include, for example, an image receiver and/or an image splitter, and the foregoing receiver splitter may support HDMI format or other image formats. The image processing module can, for example, convert the image information of the image input signal into image information suitable for SDR according to a conversion information, so as to generate a first image output signal conforming to SDR. The conversion information can be learned from comparison tables or real-time calculations. The above-mentioned "conversion" can actually be, for example, adjusting the image information through an image conversion formula to obtain SDR image information, which is just an example and is not limited thereto. The image processing module can be implemented by software or hardware circuits, such as processors, main control units (MCUs), system-on-chips (SoCs), field-programmable gate arrays (FPGAs), and the like. An image receiving device may refer to a device capable of performing image functions such as display/storage/streaming/live broadcast or image editing/directing, etc., and may be implemented on a computer or a device with a single image function. The image receiving device can be a device that supports HDR or does not support HDR. The backend interface circuit can include a video bridge controller, wherein the video bridge controller can be designed to conform to the PCI-E bus format or the universal serial bus format according to actual needs. The image receiving device can use the image bridge controller to enable the image processing module to convert the image input signal conforming to the HDR format into the first image output signal conforming to the SDR format. For example, the image receiving device can send related commands or messages to the image The bridge controller is used to control the image processing module to perform corresponding image processing through the image bridge controller.

In addition, the image receiving device can also receive the first image output signal and/or the second image output signal from the image processing module through the backend interface, wherein the second image output signal conforms to the HDR format. In actual operation, the image processing module can output the second HDR image output signal through a signal pass through based on the HDR image input signal. Of course, the image processing module can pass through the HDR image input signal based on some After image calculations, a second HDR image output signal is generated. These image operations may be, for example, changing resolution/frame rate or other image parameters. In addition, the image processing module can output the first image output signal of SDR and the second image output signal of HDR substantially synchronously, or selectively output the first image output signal of SDR or the second image output signal of HDR. signal. For more detailed description, several embodiments are given below.

FIG. 1 is a schematic diagram of an image signal converting device based on the first embodiment of the present application. As shown in Figure 1, in this embodiment, an image signal converting device 11 is used in conjunction with an image sending device 12 and an image receiving device 13, and the image signal converting device 11 includes a front-end interface 111 and an image processing module 112 and a backend interface 113. The front-end interface 111 is coupled to the image sending device 12 to receive an image input signal from the image sending device 12 , wherein the image input signal conforms to the HDR format. The image processing module 112 is coupled to the front-end interface 111. The image processing module 112 outputs a first image output signal V11 according to the image input signal, wherein the first image output signal V11 conforms to the SDR format. The back-end interface 113 is respectively coupled to the image processing module 112 and the image receiving device 13, wherein the image receiving device 13 receives the first video output signal V11 output from the image processing module 112 and a second video output signal V11 through the back-end interface 113. The video output signal V12, wherein the second video output signal V12 conforms to the HDR format.

Because the image processing module 112 can output the first SDR image output signal V11 and the HDR second image output signal V12 according to the image input signal, and provide the image receiving device 13 for subsequent use. Therefore, the image receiving device can be more suitable for various image functions that support or do not support HDR. In this example, for example, the first SDR video output signal V11 can be used for display on a screen that does not support HDR, and the HDR second video output signal V12 can be stored for later use, or, of course, the HDR second video output signal V12 It can be displayed on a screen that supports HDR, and the SDR first image output signal V11 can be stored and provided for subsequent display on a screen that does not support HDR.

In this embodiment, the image processing module 112 can output the second HDR image output signal V12 according to the image input signal. In actual operation, the image processing module 112 can output the second HDR image output signal V12 through signal pass through according to the HDR image input signal. Of course, the image processing module 112 can be based on the HDR image input signal. The second video output signal V12 of HDR is generated after the signal undergoes some image operations, and these image operations can change the resolution/frame rate or other image parameters, for example. In addition, the image processing module 112 can, for example, output the first image output signal V11 of SDR and the second image output signal V12 of HDR substantially synchronously. The substantially synchronous here means that there is still a slight time difference within a reasonable allowable range. still within the scope of substantial synchronization as explained here. In another example, the image processing module 112 can output the first image output signal V11 of SDR and the second image output signal V12 of HDR respectively. The backend interface 113 may respectively or substantially synchronously output the first image output signal V11 of SDR and the second image output signal V12 of HDR to the image receiving device 13 .

The front-end interface can include receivers and splitters according to actual needs. For example, please refer to FIG. The image input signal of the sending device 12 . The image signal converting device 11 can be used together with another image receiving device 14, wherein the front-end interface 111 further includes a High Definition Multimedia Interface (HDMI) splitter 1112, wherein the HDMI splitter 1112 is connected to the HDMI receiver 1111 and the HDMI splitter 1111 respectively. The video sending device 12 is coupled, and splits and outputs the video input signal to the HDMI receiver and another video receiving device 14 respectively. In actual operation, the HDMI splitter 1112 can be output in a signal pass through manner, or can be output after changing resolution/frame rate or other image parameters, for example, and there is no limitation here.

The image receiving device 13 can enable the image processing module 112 to convert the video input signal conforming to the HDR format into the first video output signal V11 conforming to the SDR format through the back-end interface 113, for example, the video receiving device 13 can transmit related commands Or send the message to the backend interface 113 to control the image processing module 112 to perform the corresponding image processing work through the backend interface 113 . In addition, the image receiving device 13 can also enable the image processing module 112 to output the first image output signal V11 of SDR and the second image output signal V12 of HDR synchronously or separately through the backend interface 113 .

FIG. 3 is a schematic diagram of an image signal conversion device based on the second embodiment of the present invention. As shown in Fig. 3, in this embodiment, the image signal converting device 31 is connected with an image sending device The device 32 is used together with an image receiving device 33 , and the image signal conversion device 31 includes a front-end interface circuit 311 , a field-programmable gate array (FPGA) image processor 312 and a back-end interface circuit 313 . The front-end interface circuit 311 is electrically connected to the image sending device 32 to receive an image input signal from the image sending device 32 , wherein the image input signal complies with the HDR format. The image processor 312 of the FPGA is electrically connected to the front-end interface circuit 311. The image processor 312 of the FPGA outputs a first image output signal V31 according to the image input signal. The first image output signal V31 conforms to the SDR format. The back-end interface circuit 313 is electrically connected to the image processor 312 and the image receiving device 33 of the FPGA respectively, wherein the back-end interface circuit 313 includes an image bridge controller, wherein the image bridge controller conforms to the express peripheral interconnection standard bus ( PCI-E BUS), the image receiving device 33 receives the first image output signal V31 from the FPGA image processor through the image bridge controller in a format conforming to the express peripheral interconnection standard bus.

Continuing from the above, the image processor 312 of the FPGA outputs the first image output signal V31 of the SDR according to the image input signal of the HDR for the subsequent use of the image receiving device 33, such as storage, display, or streaming, which can be more comprehensively applicable to different Issues when supporting HDR format.

In this embodiment, the image processor 312 of the FPGA can selectively output the first image output signal V31 or a second image output signal V32, and the second image output signal V32 conforms to the HDR format. In addition, the image processor 312 of the FPGA outputs a second HDR image output signal V32 according to the image input signal. In actual operation, the image processor 312 of the FPGA can output the second image output signal V32 of HDR through a signal pass through according to the HDR image input signal. Of course, the image processor 312 of the FPGA can be based on the HDR image input signal. The image input signal is subjected to some image operations to generate the HDR second image output signal V32 , and these image operations can change resolution/frame rate or other image parameters, for example. The backend interface circuit 313 can be an optional Selectively output the SDR first image output signal V31 or the HDR second image output signal V32 to the image receiving device 33 . Of course, there may be a register in the back-end interface circuit 313. Even if the image processor 312 of the FPGA selectively outputs the signal V31/V32, it can be temporarily stored in the register of the back-end interface circuit 313, and then respectively or The first video output signal V31 of SDR and the second video output signal V32 of HDR are substantially synchronously output to the video receiving device 33 .

In this embodiment, the front-end interface circuit 311 can have different designs according to actual requirements, for example, it includes a high-definition multimedia interface (HDMI) receiver and a high-definition multimedia interface (HDMI) splitter. Relevant receivers and shunts have been described in the foregoing embodiments, and will not be repeated here.

The video receiving device 33 can pass through the video bridge controller of the back-end interface circuit 313, so that the video processor 312 of the FPGA converts the video input signal conforming to the HDR format into the first video output signal V31 conforming to the SDR format, for example, video receiving The device 33 can send relevant commands or messages to the video bridge controller of the backend interface circuit 313 to control the image processor 312 of the FPGA to perform corresponding image processing through the video bridge controller of the backend interface circuit 313 . In addition, the image receiving device 33 can also be controlled by the image bridge controller of the back-end interface circuit 313, so that the image processor 312 of the FPGA selectively outputs the first image output signal V31 of SDR or the second image output signal V32 of HDR. .

FIG. 4 is a schematic diagram of an image signal conversion device based on the third embodiment of the present invention. As shown in Figure 4, in this embodiment, an image signal converting device 41 is used in conjunction with an image sending device 42 and an image receiving device 43, and the image signal converting device 41 includes a front-end interface circuit 411, an image processing hardware A circuit 412 and a backend interface circuit 413 . The front-end interface circuit is electrically connected to the image sending device 42 to receive an image input signal from the image sending device 42, wherein the image input signal conforms to the HDR format. The image processing hardware circuit 412 is electrically connected to the front-end interface The surface circuit 411 and the image processing hardware circuit 412 output a first image output signal V41 according to the image input signal, and the first image output signal V41 conforms to the SDR format. The back-end interface circuit 413 is electrically connected to the image processing hardware circuit 412 and the image receiving device 43 respectively, wherein the back-end interface circuit 413 includes a video bridge controller of a general-purpose serial bus, and the video receiving device 43 uses the general-purpose serial bus The video bridge controller of the bus receives the first video output signal V41 from the video processing hardware circuit 412 .

Continuing from the above, the image processing hardware circuit 412 outputs the first image output signal V41 of SDR according to the image input signal of HDR for the subsequent use of the image receiving device 43, such as storage, display or streaming, which can be more comprehensively applicable to different Issues when supporting HDR format.

In this embodiment, the image processing hardware circuit 412 can selectively output the first image output signal V41 or a second image output signal V42, and the second image output signal V42 conforms to the HDR format. In addition, the image processing hardware circuit 412 outputs a second HDR image output signal V42 according to the image input signal. In actual operation, the image processing hardware circuit 412 can output the second HDR image output signal V42 through a signal pass through based on the HDR image input signal. Certainly, the image processing hardware circuit 412 can be based on the HDR image input signal. The image input signal is subjected to some image operations to generate the HDR second image output signal V42, and these image operations may be, for example, changing resolution/frame rate or other image parameters. The backend interface circuit 413 can selectively output the SDR first image output signal V41 or the HDR second image output signal V42 to the image receiving device 43 . Of course, there may also be a temporary register in the back-end interface circuit 413. Even if the image processing hardware circuit 412 selectively outputs the signal V41/V42, it can be temporarily stored in the temporary register of the back-end interface circuit 413, and then respectively or The first video output signal V41 of SDR and the second video output signal V42 of HDR are substantially synchronously output to the video receiving device 43 .

In this embodiment, the front-end interface circuit 411 can have different designs according to actual requirements, for example, it includes a high-definition multimedia interface (HDMI) receiver and a high-definition multimedia interface (HDMI) splitter. Relevant receivers and shunts have been described in the foregoing embodiments, and will not be repeated here.

The image receiving device 43 can pass through the universal serial bus image bridge controller of the back-end interface circuit 413, so that the image processing hardware circuit 412 converts the image input signal conforming to the HDR format into the first image output signal V41 conforming to the SDR format, For example, the image receiving device 43 can send related commands or messages to the USB video bridge controller of the back-end interface circuit 413, so as to control the image processing hardware through the USB video bridge controller of the back-end interface circuit 413. The bulk circuit 412 performs corresponding image processing. In addition, the image receiving device 43 can also be controlled by the universal serial bus image bridge controller of the back-end interface circuit 413, so that the image processing hardware circuit 412 selectively outputs the first image output signal V41 of SDR or the second image output signal of HDR. Video output signal V42.

FIG. 5 is a schematic diagram of an image signal conversion device based on the fourth embodiment of the present application. As shown in FIG. 5, in this embodiment, an image signal conversion device 51 is used together with an image sending device 52 and an image receiving device 53. The image signal conversion device 51 includes a front-end interface 511 and an image processing module 512. and a backend interface 513 . The front-end interface 511 is coupled to the image sending device 52 to receive an image input signal from the image sending device 52 , wherein the image input signal complies with the HDR format. The image processing module 512 is coupled to the front-end interface 511. The image processing module 512 outputs a first image output signal V51 according to the image input signal. The first image output signal V51 conforms to the SDR format. The back-end interface 513 is respectively coupled to the image processing module 512 and the image receiving device 53. The back-end interface 513 includes an image bridge controller 5131, and the image receiving device 53 receives images from the image processing module 512 through the image bridge controller 5131. The first video output signal, where The video bridge controller 5131 is further coupled to the front-end interface 511 to receive an image metadata M10 corresponding to the video input signal from the front-end interface 511 for use by the video receiving device 53 .

Continuing from the above, the image processing module 512 outputs the first image output signal V51 of SDR according to the image input signal of HDR for the subsequent use of the image receiving device 53, such as storing, displaying or streaming functions, which can be more comprehensively applicable. Problems with HDR format.

In this embodiment, the image metadata M10 may include high dynamic range display (HDR) information of the HDR image input signal.

The video bridge controller 5131 can be a UBS video bridge controller, and the UBS video bridge controller 5131 can transmit the video metadata M10 to the video receiving device 53 in a UBS format. In this embodiment, the universal serial bus image level extension unit (UVC-Extension Unit) or the universal serial bus human interface unit (USB-HID) transmits the image metadata M10 to the image receiving device 53 . In addition, the image receiving device 53 can also be designed according to actual needs. Under the USB format framework, the channel that can transmit the image metadata M10 to the image receiving device 53 from the back-end interface 513 is not limited to UVC-Extension Unit or USB-HID.

The image processing module 512 can convert the input video signal conforming to the HDR format into the first output video signal conforming to the SDR format according to a conversion information, and the conversion information is associated with the HDR information of the image metadata. In actual operation, the conversion information can be obtained from the HDR information of the image metadata and the conversion function of converting HDR to SDR. The conversion information can be learned from comparison tables or real-time calculations. The above-mentioned "conversion" can actually be, for example, adjusting the image information through an image conversion formula for converting the information to obtain the SDR image information.

In this embodiment, the image processing module 512 can selectively output the first The video output signal V51 or a second video output signal V52, the second video output signal V52 complies with the HDR format. In addition, the image processing module 512 outputs a second HDR image output signal V52 according to the image input signal. In actual operation, the image processing module 512 can output the second HDR image output signal V52 through signal pass through according to the HDR image input signal. Certainly, the image processing module 512 can be based on the HDR image input signal. The second video output signal V52 of HDR is generated after the signal undergoes some image operations, and these image operations can change the resolution/frame rate or other image parameters, for example. The backend interface 513 can selectively output the SDR first image output signal V51 or the HDR second image output signal V52 to the image receiving device 53 . Of course, there may also be a register in the back-end interface 513. Even if the image processing module 512 selectively outputs the signal V51/V52, it can be temporarily stored in the register of the back-end interface 513, and then separately or substantially synchronized. Output the first image output signal V51 of SDR and the second image output signal V52 of HDR to the image receiving device 53 .

The video receiving device 53 can use the video bridge controller 5131 of the backend interface 513 to make the video processing module 512 convert the video input signal conforming to the HDR format into the first video output signal V51 conforming to the SDR format. For example, the conversion information can be Stored in the video bridge controller 5131. When the image receiving device 53 transmits related commands or messages to the video bridge controller 5131 of the UBS of the backend interface 513, the video bridge controller 5131 of the UBS will send the conversion information to the image processing module 512, The image processing module 512 is controlled to perform corresponding image processing tasks. In addition, the image receiving device 53 can also be controlled by the universal serial bus image bridge controller of the back-end interface 513, so that the image processing module 512 selectively outputs the first image output signal V51 of SDR or the second image output of HDR. Signal V52.

In this embodiment, the front-end interface 511 can have different settings according to actual needs. The design includes, for example, a High Definition Multimedia Interface (HDMI) receiver and a High Definition Multimedia Interface (HDMI) splitter. Relevant receivers and shunts have been described in the foregoing embodiments, and will not be repeated here. In addition, the video bridge controller 5131 may be a receiver coupled to the front-end interface 511 to receive the video metadata M10 corresponding to the video input signal from the receiver of the front-end interface 511 .

FIG. 6 is a schematic diagram of an image signal conversion device based on the fifth embodiment of the present invention. As shown in FIG. 6 , in this embodiment, an image signal converting device 21 , an image sending device 22 and an image receiving device 23 . The image signal conversion device 21 includes a front-end interface 211 , an image processing module 212 and a back-end interface 213 . The front-end interface 211 is coupled to the video sending device 22 to receive an video input signal from the video sending device 22 , wherein the video input signal complies with a first frame rate format. The image processing module 212 is coupled to the front-end interface 211. The image processing module 212 outputs a first image output signal V21 according to the image input signal. The first image output signal V21 conforms to a second frame rate format. The back-end interface 213 is respectively coupled to the image processing module 212 and the image receiving device 23, wherein the image receiving device 23 receives the first video output signal V21 and a second video output signal from the image processing module 212 through the back-end interface 213 V22, wherein the second video output signal V22 conforms to the format of the first frame rate.

Because the image processing module 212 can output the first image output signal V21 of the second frame rate and the second image output signal V22 of the first frame rate according to the image input signal, and provide the image receiving device 23 for subsequent use. Therefore, the image receiving device can be more suitable for more image functions operating at the same time. In this example, for example, the second frame rate (eg, low frame rate) of the first video output signal V21 can be streamed to save bandwidth. The second video output signal V22 of the first frame rate (for example, high frame rate) can be stored for future use of the high frame rate video by the user.

The first frame rate may be greater than the second frame rate, but not limited thereto. This embodiment , the first frame rate may be greater than or equal to 60 frames per second (FPS), wherein the second frame rate may be less than or equal to 60 frames per second (FPS).

In this embodiment, the image processing module 212 can output the second image output signal V22 of the first frame rate according to the image input signal. In actual operation, the image processing module 212 can output the second image output signal V22 of the first frame rate through signal pass through according to the image input signal of the first frame rate. Of course, the image processing module 212 can The second image output signal V22 of the first frame rate is generated after some image operations are performed on the image input signal of the first frame rate. These image operations can be, for example, changing resolution/or converting HDR to SDR or other image parameters. In addition, the image processing module 212 can, for example, substantially synchronously output the first image output signal V21 of the second frame rate and the second image output signal V22 of the first frame rate. There is still a slight time difference within the range of substantial synchronization explained here. In another example, the image processing module 212 can respectively output the first image output signal V21 of the second frame rate and the second image output signal V22 of the first frame rate. The backend interface 213 may respectively or substantially synchronously output the first video output signal V21 of the second frame rate and the second video output signal V22 of the first frame rate to the video receiving device 23 .

The image receiving device 23 can use the backend interface 213 to enable the image processing module 212 to convert the video input signal conforming to the first frame rate into the first video output signal V21 conforming to the second frame rate. For example, the image receiving device 23 can Send relevant commands or messages to the backend interface 213 to control the image processing module 212 to perform corresponding image processing tasks through the backend interface 213 . In addition, the image receiving device 23 can also use the back-end interface 213 to make the image processing module 212 output synchronously or separately output the first image output signal V21 of the second frame rate and the second image output signal of the first frame rate. V22.

To sum up, the technical content of this case provides an image signal conversion device, so as to be more comprehensively applicable to the problems in the application of multiple image functions.

Although this case is disclosed as above with the embodiment, it is not used to limit this case. Anyone who is familiar with this technology can make various changes and modifications without departing from the spirit and scope of this case. Therefore, the scope of protection of this case should be regarded as attached The scope of the patent application shall prevail.

21: Image signal conversion device

211: front-end interface

212: Image processing module

213‧‧‧backend interface

22‧‧‧Image sending device

23‧‧‧Image receiving device

V21‧‧‧First video output signal

V22‧‧‧Second video output signal

Claims (10)

An image signal converting device is used in conjunction with an image sending device and an image receiving device, comprising: a front-end interface coupled to the image sending device to receive an image input signal from the image sending device, wherein the image The input signal conforms to a format of a first frame rate; an image processing module is coupled to the front-end interface, and the image processing module outputs a first image output signal substantially synchronously according to the image input signal and A second image output signal, the first image output signal conforms to a format of a second frame rate, wherein the first frame rate is greater than the second frame rate; and a back-end interface, respectively coupled to the image processing module and the image receiving device, wherein the image receiving device receives the first image output signal and the second image output signal from the image processing module through the back-end interface, wherein the second image output signal conforms to the first A frame rate format. The image signal conversion device as described in claim 1, wherein the first image output signal conforming to the second frame rate is a signal conforming to a standard range display format, and the second image output signal conforming to the first frame rate is a signal Signals conforming to high dynamic range display formats. The image signal conversion device as described in Claim 1, wherein the first frame rate is greater than or equal to 60 frames per second (FPS), and wherein the second frame rate is less than or equal to 60 frames per second (FPS). The image signal conversion device as described in Claim 1, wherein the image processing module outputs the second image output signal in a pass-through manner according to the image input signal. The image signal conversion device as described in claim 1, wherein the image processing module generates the second image output signal conforming to the first frame rate according to image calculation, wherein the image calculation includes changing resolution, frame rate or other Image parameters. The image signal conversion device as described in Claim 1, wherein the image processing module is an image processing hardware circuit. The image signal conversion device as described in Claim 6, wherein the image processing hardware circuit is a system-on-chip (SoC) image processor or a field-programmable gate array (FPGA) image processor. The image signal conversion device as described in Claim 1, wherein the front-end interface includes a high-definition multimedia interface (HDMI) receiver, and receives the image input from the image sending device in a manner conforming to the high-definition multimedia interface format signal. The image signal conversion device as described in claim 8, wherein the image signal conversion device is used in conjunction with another image receiving device, wherein the front-end interface further includes a high-definition multimedia interface (HDMI) splitter, wherein the The high-definition multimedia interface splitter is respectively coupled to the high-definition multimedia interface receiver and the image sending device, and splits and outputs the image input signal to the high-definition multimedia interface receiver and the other image receiving device . The image signal conversion device as described in claim 1, wherein the image receiving device sends relevant commands or messages to the back-end interface to control the image processing module to perform corresponding image processing through the back-end interface, the image processing The module converts the video input signal conforming to the first frame rate into a first video output signal conforming to the second frame rate.

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