TWI811217B - Video signal conversion device - Google Patents

Abstract

A video signal conversion device includes a frontend circuit, a video processing hardware circuit and a backend circuit. The frontend circuit receives a HDR video input signal from a video device. The video processing hardware circuit outputs a SDR first video output signal. A video receiving device receives the first video output signal and a HDR second video output signal from the video processing hardware circuit through the video bridge controller of the backend circuit by USB.

Description

Image signal conversion device

This case involves a conversion device, especially a conversion device used in image signals.

At present, image content with High Dynamic Range (HDR) display format has been increasingly accepted by front-end image source devices. For example, the current video game console PS4 can already output support for High Dynamic Range (HDR) display. format of game images, however, currently, when designing image products, back-end image manufacturers do not consider whether the back-end image receiver supports the high dynamic range (HDR) display format when performing recording, display or other image applications. In this way, for example, when the signal input from the front end to the back end (image receiving end) is an image signal in HDR format, but the back end (image receiving end) does not support the HDR format, the back end (image receiving end) ), users will be able to easily detect color abnormalities caused by inconsistent image formats.

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

The invention discloses an image signal conversion device for use with an image sending device and an image receiving device. The image signal conversion device includes a front-end interface circuit, an image processing hardware circuit and a back-end interface circuit. A front-end interface circuit is electrically connected to the image sending device to receive an image input signal from the image sending device, wherein the image input signal complies with a high dynamic range display format. The image processing hardware circuit is electrically connected to the front-end interface circuit. The image processing hardware circuit outputs a first image output signal according to the image input signal. The first image output signal conforms to a standard range display format. The back-end interface circuit is electrically connected to the image processing hardware circuit and the image receiving device respectively. The back-end interface circuit includes an image bridge controller of the Universal Serial Bus, and the image receiving device is controlled through the image bridge of the Universal Serial Bus. The processor receives the first image output signal from the image processing hardware circuit in a format conforming to the Universal Serial Bus.

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 problem when the back-end image receiving end does not support the high dynamic range display format or the back-end image receiving end requires a standard range display format.

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: Image processor for field programmable gate array

412:Image processing hardware circuit

113, 213, 513: Backend interface

313, 413: Back-end interface circuit

5131:Image 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: first image output signal

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

M10: Image metadata

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

The following will clearly illustrate the spirit of this application with drawings and detailed descriptions. Anyone with ordinary knowledge in the technical field, after understanding the embodiments of this application, can make changes and modifications based on the techniques taught in this application without departing from the spirit of this application. Spirit and scope.

The terms used herein are only used to describe specific embodiments and are not intended to be limiting. Singular forms such as "a", "this", "this", "this" and "the", as used herein, also include the plural forms.

The terms "first", "second", ..., etc. used in this article do not specifically refer to the order or sequence, nor are they used to limit this case. They are only used to distinguish components or operations described with the same technical terms. .

As used herein, "coupling" or "connected" may refer to two or more components or devices being in direct physical contact with each other, or being in indirect physical contact with each other, or it may also refer to two or more components or devices being in physical contact with each other. Operation or action can also refer to direct or indirect connections between electrical properties (electricity or electrical signals).

The words "includes", "includes", "has", "contains", etc. used in this article are all open terms, which mean including but not limited to.

As used in this article, "and/or" includes any or all combinations of the stated things.

Regarding the directional terms used in this article, such as: up, down, left, right, front or back, etc., they are only for reference to the directions of the attached drawings. Therefore, the directional terms used are to illustrate and not to limit the case.

Regarding the terms used in this article, unless otherwise noted, they generally have the ordinary meanings of each term used in this field, the content of this case, and the special content. Certain terms used to describe the present invention are discussed below or elsewhere in this specification to provide those skilled in the art with additional guidance in describing the present invention.

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

The embodiment of this case discloses an image signal conversion device that can be used with an image sending device and an image receiving device. The image signal conversion device may 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 complies with a high dynamic range display format. Hereinafter, "high dynamic range display" will be referred to as "HDR". 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 complies with a standard range display format. Hereinafter, "standard range display" will be referred to as "SDR". The back-end 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 output from the image processing module through the back-end interface.

The image sending device can at least send image input signals in HDR format, for example, it can only send image input signals in HDR format, or it can send image input signals in HDR and/or SDR formats 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, for example, include 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 may, for example, convert the image information of the image input signal into image information applicable to SDR based on a conversion information, thereby generating a first image output signal that is compliant with SDR. The conversion information can be obtained from a comparison table or real-time calculation. The above-mentioned "conversion" can actually be, for example, adjusting the image information through the image conversion formula of the conversion information to obtain SDR image information. This is only an example and is not limited to this. The image processing module can be implemented as a software or hardware circuit, such as a processor, a main control unit (MCU), a system on a chip (SoC), a field programmable gate array (FPGA), etc. The image receiving device can refer to a device that can perform image functions such as display/storage/streaming/live broadcast or image editing/directing, etc. It can be implemented on a computer or a device with a single image function. The image receiving device may be a device that supports HDR or does not support HDR. The back-end interface circuit may include an image bridge controller, and the image bridge controller may be designed according to actual requirements to comply with the format of the Peripheral Interconnect Express Bus (PCI-E BUS) or the format of the Universal Serial Bus, etc. The image receiving device can use the image bridge controller to enable the image processing module to convert the image input signal compliant with the HDR format into the first image output signal compliant with the SDR format. For example, the image receiving device can send relevant commands or messages to the image The bridge controller controls the image processing module to perform corresponding image processing work 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 output from the image processing module through the back-end interface, wherein the second image output signal complies with the HDR format. In actual operation, the image processing module can use the signal pass through to output the HDR second image output signal based on the HDR image input signal. Of course, the image processing module can use the HDR image input signal to pass through some The second image output signal of HDR is generated after image operations. These image operations can, for example, change the resolution/frame rate or other image parameters. In addition, the image processing module may, for example, substantially simultaneously output the first image output signal of SDR and the second image output signal of HDR, or may selectively output the first image output signal of SDR or the second image output signal of HDR. signal. For more detailed description, several examples are given below.

Figure 1 is a schematic diagram of an image signal conversion device based on the first embodiment of the present invention. As shown in Figure 1, in this embodiment, the image signal conversion device 11 is used in conjunction with an image sending device 12 and an image receiving device 13. The image signal conversion 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, where the image input signal complies with 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 complies with the SDR format. The backend interface 113 is coupled to the image processing module 112 and the image receiving device 13 respectively. The image receiving device 13 receives the first image output signal V11 and a second image output signal V11 output from the image processing module 112 through the backend interface 113 . The image output signal V12, wherein the second image output signal V12 complies with the HDR format.

Because the image processing module 112 can output the SDR first image output signal V11 and the HDR second image output signal V12 according to the image input signal, and provide them to 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 SDR first image output signal V11 can be used on a screen display that does not support HDR, and the HDR second image output signal V12 can be stored for subsequent use. Or, of course, the HDR second image output signal V12 It can be used on screens that support HDR, and the SDR first image output signal V11 can be stored and later provided for screen display that does not support HDR.

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

The front-end interface can include a receiver and a splitter according to actual needs. For example, please refer to Figure 2. The front-end interface 111 includes a high-definition multimedia interface (HDMI) receiver 1111, and receives images from the HDMI format in a manner that complies with the HDMI format. The image input signal of the sending device 12 is transmitted. The image signal conversion device 11 can be used in conjunction with another image receiving device 14. 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 HDMI receiver 1111 respectively. The image sending device 12 is coupled and branches and outputs the image input signal to the HDMI receiver and another image receiving device 14 respectively. In actual operation, the HDMI splitter 1112 may output the signal in a pass through manner, or may output the signal after changing the resolution/frame rate or other image parameters, and there is no limit here.

The image receiving device 13 can enable the image processing module 112 to convert the image input signal compliant with the HDR format into a first image output compliant with the SDR format through the back-end interface 113 Signal V11, for example, the image receiving device 13 can send relevant commands or messages to the backend interface 113 to control the image processing module 112 to perform corresponding image processing work through the backend interface 113. In addition, the image receiving device 13 can also use the back-end interface 113 to control whether the image processing module 112 outputs the first image output signal V11 of SDR and the second image output signal V12 of HDR in real-valued synchronization or respectively.

Figure 3 is a schematic diagram of an image signal conversion device based on the second embodiment of the present invention. As shown in Figure 3, in this embodiment, the image signal conversion device 31 is used in conjunction with an image sending device 32 and an image receiving device 33. The image signal conversion device 31 includes a front-end interface circuit 311, a field programmable An image processor 312 of a gate array (FPGA) 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, where 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 complies with 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. The back-end interface circuit 313 includes an image bridge controller, and the image bridge controller complies with the Fast Peripheral Interconnect Standard Bus ( PCI-E BUS) format, the image receiving device 33 receives the first image output signal V31 from the image processor of the FPGA through the image bridge controller in a format that conforms to the Express Peripheral Interconnect standard bus.

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

In this embodiment, the image processor 312 of the FPGA can selectively output A first image output signal V31 or a second image output signal V32 is output, and the second image output signal V32 complies with the HDR format. In addition, the image processor 312 of the FPGA outputs the HDR second image output signal V32 according to the image input signal. In actual operation, the image processor 312 of the FPGA can output the HDR second image output signal V32 through a signal pass through based on 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 undergoes some image operations to generate the HDR second image output signal V32. These image operations can, for example, change the resolution/frame rate or other image parameters. The back-end interface circuit 313 may 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 can also 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 separated or The first image output signal V31 of SDR and the second image output signal V32 of HDR are substantially simultaneously output to the image receiving device 33 .

In this embodiment, the front-end interface circuit 311 can have different designs according to actual needs, such as including a high-definition multimedia interface (HDMI) receiver and a high-definition multimedia interface (HDMI) splitter. The receiver and splitter have been described in the previous embodiments and will not be described again here.

The image receiving device 33 can use the image bridge controller of the back-end interface circuit 313 to cause the image processor 312 of the FPGA to convert the image input signal compliant with the HDR format into the first image output signal V31 compliant with the SDR format. For example, image reception The device 33 can send relevant commands or messages to the image bridge controller of the back-end interface circuit 313 to control the image processor 312 of the FPGA to perform corresponding image processing work through the image bridge controller of the back-end 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 to cause the image processor 312 of the FPGA to selectively output the first image of the SDR. The output signal V31 or the second image output signal V32 of HDR.

Figure 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, the image signal conversion device 41 is used in conjunction with an image sending device 42 and an image receiving device 43. The image signal conversion device 41 includes a front-end interface circuit 411 and an image processing hardware. circuit 412 and a back-end 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, where the image input signal complies with the HDR format. The image processing hardware circuit 412 is electrically connected to the front-end interface circuit 411. The image processing hardware circuit 412 outputs a first image output signal V41 according to the image input signal. The first image output signal V41 complies with 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. The back-end interface circuit 413 includes an image bridge controller of a universal serial bus, and the image receiving device 43 is connected through the universal serial bus. The image bridge controller of the bus receives the first image output signal V41 from the image processing hardware circuit 412 .

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

In this embodiment, the image processing hardware circuit 412 can selectively output a first image output signal V41 or a second image output signal V42, and the second image output signal V42 complies with the HDR format. In addition, the image processing hardware circuit 412 outputs the HDR second image output signal V42 according to the image input signal. In actual operation, the image processing hardware circuit 412 may adopt a signal pass through to output the HDR second image output signal V42 based on the HDR image input signal. Of course, the image processing hardware circuit 412 may be based on HDR. The image input signal passes through The HDR second image output signal V42 is generated after some image operations. These image operations may, for example, change the resolution/frame rate or other image parameters. The back-end interface circuit 413 may 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, the back-end interface circuit 413 can also have a register. Even if the image processing hardware circuit 412 selectively outputs the signal V41/V42, it can be temporarily stored in the register of the back-end interface circuit 413 and then separated or The first image output signal V41 of SDR and the second image output signal V42 of HDR are substantially simultaneously output to the image receiving device 43 .

In this embodiment, the front-end interface circuit 411 can have different designs according to actual needs, such as including a high-definition multimedia interface (HDMI) receiver and a high-definition multimedia interface (HDMI) splitter. The receiver and splitter have been described in the previous embodiments and will not be described again here.

The image receiving device 43 can use the universal serial bus image bridge controller of the back-end interface circuit 413 to enable the image processing hardware circuit 412 to convert the image input signal compliant with the HDR format into the first image output signal V41 compliant with the SDR format. For example, the image receiving device 43 can send relevant commands or messages to the USB image bridge controller of the back-end interface circuit 413 to control the image processing hardware through the USB image bridge controller of the back-end interface circuit 413. The body circuit 412 performs corresponding image processing work. 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 V41 of HDR. Image output signal V42.

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

Following the above, the image processing module 512 outputs the SDR first image output signal V51 according to the HDR image input signal for subsequent use by the image receiving device 53, such as storage, display or streaming functions, which can be more comprehensively applicable to those that do not support Problem 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 image bridge controller 5131 may be a universal serial bus image bridge controller. The universal serial bus image bridge controller 5131 may transmit the image metadata M10 to the image receiving device 53 through a universal serial 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, a channel that can transmit the image metadata M10 from the back-end interface 513 to the image receiving device 53 under the USB format structure can also be designed in the image receiving device 53 according to actual needs, and is not limited to only UVC-Extension. Unit or USB-HID.

The image processing module 512 can convert the image input signal compliant with the HDR format into the first image output signal compliant with the SDR based on 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 derived from the HDR information of the image metadata and the HDR conversion SDR conversion function. The conversion information can be obtained from a comparison table or real-time calculation. The above-mentioned "conversion" may actually be, for example, adjusting the image information through the image conversion formula of the conversion information to obtain SDR image information.

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

The image receiving device 53 can use the image bridge controller 5131 of the back-end interface 513 to cause the image processing module 512 to convert the image input signal compliant with the HDR format into For example, the first image output signal V51 in SDR format, the conversion information can be stored in the image bridge controller 5131. When the image receiving device 53 sends relevant commands or messages to the image bridge controller 5131 of the universal serial bus of the back-end interface 513, the image bridge controller 5131 of the universal serial bus will send the conversion information to the image processing module 512, The image processing module 512 is controlled to perform corresponding image processing work. 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 signal of HDR. Signal V52.

In this embodiment, the front-end interface 511 can have different designs according to actual needs, such as including a High Definition Multimedia Interface (HDMI) receiver and a High Definition Multimedia Interface (HDMI) splitter. The receiver and splitter have been described in the previous embodiments and will not be described again here. In addition, the image bridge controller 5131 may be a receiver coupled to the front-end interface 511 to receive the image metadata M10 corresponding to the image input signal from the receiver of the front-end interface 511 .

Figure 6 is a schematic diagram of an image signal conversion device based on the fifth embodiment of the present invention. As shown in Figure 6, in this embodiment, the image signal conversion device 21, the image sending device 22, and the image receiving device 23 are included. 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 image sending device 22 to receive an image input signal from the image sending device 22, where the image 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 complies with a second frame rate format. The backend interface 213 is coupled to the image processing module 212 and the image receiving device 23 respectively, wherein the image receiving device 23 receives the first image output signal V21 and a second image output signal from the image processing module 212 through the backend interface 213 V22, the second shadow of which Image 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 at the second frame rate and the second image output signal V22 at the first frame rate according to the image input signal, for subsequent use by the image receiving device 23 . Therefore, the image receiving device can be more suitable for more image functions operating simultaneously. In this example, for example, the first image output signal V21 with a second frame rate (eg, a low frame rate) can be used for streaming to save bandwidth. The second image output signal V22 of the first frame rate (eg, high frame rate) can be stored for the user to use the high frame rate image in the future.

The first frame rate may be greater than the second frame rate, but is not limited thereto. In this embodiment, the first frame rate may be greater than or equal to 60 frames per second (FPS), and 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 may adopt a signal pass through to output the second image output signal V22 of the first frame rate based on the image input signal of the first frame rate. Of course, the image processing module 212 may The second image output signal V22 of the first frame rate is generated based on the image input signal of the first frame rate through some image operations. These image operations can, for example, change the resolution/or convert HDR to SDR or other image parameters. In addition, the image processing module 212 may, 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. The substantial synchronization here may mean that it is within reasonable limits. There are still some slight time differences within the scope of substantial synchronization as explained here. In another example, the image processing module 212 may output the first image output signal V21 at the second frame rate and the second image output signal V22 at the first frame rate respectively. The back-end interface 213 may output the first image output signal V21 of the second frame rate and the first frame rate separately or substantially simultaneously. The second image output signal V22 is sent to the image receiving device 23 .

The image receiving device 23 can enable the image processing module 212 to convert the image input signal conforming to the first frame rate into the first image output signal V21 conforming to the second frame rate through the backend interface 213. 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 work through the backend interface 213 . In addition, the image receiving device 23 can also use the back-end interface 213 to control whether the image processing module 212 outputs a real-valued synchronous output or separately outputs the first image output signal V21 of the second frame rate and the second image output signal of the first frame rate. V22.

In summary, the technical content of this case provides an image signal conversion device that can be more comprehensively applied to problems when the back-end image receiver does not support high dynamic range display formats or the back-end image receiver requires a standard range display format. .

Although this case is disclosed as above using embodiments, it is not intended to limit this case. Anyone 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 shall be regarded as appended. The scope of the patent application shall prevail.

41‧‧‧Image signal conversion device

411‧‧‧Front-end interface circuit

412‧‧‧Image processing hardware circuit

413‧‧‧Back-end interface circuit

42‧‧‧Image sending device

43‧‧‧Image receiving device

V41‧‧‧First image output signal

V42‧‧‧Second image output signal

Claims (10)

An image signal conversion device is used in conjunction with an image sending device and an image receiving device, including: a front-end interface circuit electrically connected to the image sending device to receive an image input signal from the image sending device, wherein The image input signal complies with the high dynamic range display format; an image processing hardware circuit is electrically connected to the front-end interface circuit. The image processing hardware circuit outputs a first image output signal based on the image input signal. The first image output signal is The image output signal complies with the standard range display format; and a back-end interface circuit is electrically connected to the image processing hardware circuit and the image receiving device respectively, wherein the image receiving device receives the image processing through the back-end interface circuit The first image output signal output by the hardware circuit, wherein the back-end interface circuit includes an image bridge controller, wherein the image bridge controller is an image bridge controller of a universal serial bus or a fast peripheral interconnect The image bridging controller of the standard bus (PCI-E BUS). The image receiving device conforms to the universal sequence through the image bridging controller of the universal serial bus or the image bridge controller of the express peripheral interconnection standard bus. The first image output signal from the image processing hardware circuit is received in a bus format or a bus format conforming to the Fast Peripheral Interconnect standard. The image signal conversion device as claimed in claim 1, wherein the image processing hardware circuit outputs the first image output signal or a second image output signal, and the second image output signal complies with a high dynamic range display format. The image signal conversion device as described in claim 2, wherein the image processing hardware circuit is based on the The image input signal is passed through to output the second image output signal that conforms to the high dynamic range display format. The image signal conversion device as claimed in claim 1, wherein the image processing hardware circuit is an image processor of a field programmable gate array (FPGA) or an image processor of a system on a chip (SoC), wherein the The image receiving device uses the image bridge controller that complies with the Universal Serial Bus format or the Image Bridge Controller that complies with the Express Peripheral Interconnect Standard Bus, so that the image processing hardware circuit will convert the image that complies with the high dynamic range display format. The input signal is converted into the image output signal in a format that conforms to the standard range display. The image signal conversion device as described in claim 1, wherein the front-end interface circuit includes a high-definition multimedia interface (HDMI) receiver and receives the image from the image sending device in a manner that conforms to the high-definition multimedia interface format. input signal. The image signal conversion device as claimed in claim 5, wherein the image signal conversion device is used in conjunction with another image receiving device, and the front-end interface circuit further includes a high-definition multimedia interface (HDMI) splitter, wherein, The high-definition multimedia interface splitter is electrically connected to the high-definition multimedia interface receiver and the image sending device respectively, and shunts and outputs the image input signal to the high-definition multimedia interface receiver and the other image respectively. receiving device. The image signal conversion device as described in claim 1, wherein the image receiving device enables the image processing hardware circuit to operate through an image bridge controller of the Universal Serial Bus or an image bridge controller of the Fast Peripheral Interconnect Standard Bus. Convert the image input signal conforming to the high dynamic range display format into the first image output signal conforming to the standard range display format. The image signal conversion device as described in claim 1, wherein the image receiving device passes through the image bridge controller of the Universal Serial Bus or the image bridge of the Fast Peripheral Interconnect Standard Bus. Connected to a controller, the image processing hardware circuit outputs the first image output signal or a second image output signal, and the second image output signal complies with a high dynamic range display format. The image signal conversion device as described in claim 1, wherein the image receiving device through the back-end interface circuit, the image processing hardware circuit substantially simultaneously outputs the first image output signal and a second image output signal, and the The second image output signal is an image signal that complies with the high dynamic range display format. The image signal conversion device as described in claim 1, wherein the image receiving device uses the image bridge controller of the Universal Serial Bus or the image bridge controller of the Fast Peripheral Interconnect Standard Bus to enable the image processing hardware circuit. Output the first image output signal.

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