HDMI conversion circuit and device with multiplexed SDI function
By designing an HDMI conversion circuit with SDI multiplexing function and using a control module to switch between SDI and HDMI modes, the problem of inconvenient conversion between SDI and HDMI interfaces in the existing technology is solved, achieving functional integration and cost savings.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHANGZHOU MATRIX ELECTRONIC TECH CO LTD
- Filing Date
- 2025-07-10
- Publication Date
- 2026-07-21
AI Technical Summary
In the existing technology, the conversion between SDI interface and HDMI interface requires separate adapter devices, which is inconvenient and makes it impossible to integrate the two functions in a limited structure.
Design an HDMI conversion circuit with SDI multiplexing function, including an SDI input interface, an SDI equalizer module, an SDI equalizer/driver module, a control module, a SERDES module, a video module, and an HDMI output module. The control module performs mode switching to realize SDI to HDMI conversion and SDI loop-out switching.
It integrates SDI and HDMI functions, saving structural space and cost, while meeting the needs of various usage scenarios.
Smart Images
Figure CN224538235U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of video interface conversion technology, and more specifically, to an HDMI conversion circuit and device with SDI multiplexing function. Background Technology
[0002] Currently, the most common video interfaces are SDI and HDMI. In daily use, conversion between the two interfaces is often required. Video professionals use SDI to HDMI converters to connect to HDMI interface devices, such as in monitoring scenarios. They also need to loop through the SDI input. However, existing designs do not have conversion circuits that can perform both functions. Conversion devices and multiplexing devices need to be configured separately, which is very inconvenient. In order to realize more SDI interface functions in a limited structure, an HDMI conversion circuit and device with multiplexing SDI function is needed. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide an HDMI conversion circuit with SDI multiplexing function, and to provide an HDMI conversion device with SDI multiplexing function, in view of the above-mentioned defects of the prior art.
[0004] The technical solution adopted by this utility model to solve its technical problem is:
[0005] An HDMI conversion circuit with SDI multiplexing function is constructed, which includes an SDI input interface, an SDI input / loop-out interface, an SDI equalizer module, an SDI equalizer / drive module, a control module, a SERDES module, a video module, a first HDMI output module and a second HDMI output module.
[0006] The SDI equalizer module, the SDI equalizer / drive module, and the video module are all connected to and controlled by the control module.
[0007] The SDI equalization module and the SDI equalization / drive module are respectively connected to the SDI input interface and the SDI input / loopout interface;
[0008] The SERDES module is connected to both the SDI equalization module and the SDI equalization / drive module, and is used to adjust and switch the input mode and loop-out mode.
[0009] Both the first HDMI output module and the second HDMI output module are connected to the video module for HDMI signal output.
[0010] The HDMI conversion circuit with SDI multiplexing function described in this utility model uses an LMH1239 chip as the SDI equalization module.
[0011] The HDMI conversion circuit with SDI multiplexing function described in this utility model uses an LMH1297 chip as the SDI equalization / drive module.
[0012] The HDMI conversion circuit with SDI multiplexing function described in this utility model uses a chip model XCAU15P in the SERDES module.
[0013] An HDMI converter with SDI multiplexing function is provided, wherein the converter is provided with an HDMI converter circuit with SDI multiplexing function as described above.
[0014] The beneficial effects of this utility model are as follows: by controlling the operation mode switching of the SDI equalization module, SDI equalization / drive module and video module through the control module, it is possible to realize the conversion output between SDI and HDMI and the switching between the states of SDI loop-out, thereby realizing the integration of two functions, which can meet a variety of usage scenarios, save structural space and save costs. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 This is a block diagram of the HDMI conversion circuit with SDI multiplexing function according to a preferred embodiment of the present invention.
[0017] Figure 2 This is a circuit diagram of the SDI input 1 of the HDMI conversion circuit with multiplexed SDI function according to a preferred embodiment of the present invention.
[0018] Figure 3 This is a circuit diagram of the SDI input 2 / SDI loop-out of the HDMI conversion circuit with multiplexed SDI function, which is a preferred embodiment of the present invention. Detailed Implementation
[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, a clear and complete description will be provided below in conjunction with the technical solutions in the embodiments of this utility model. Obviously, the described embodiments are some, but not all, embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0020] The preferred embodiment of this utility model includes an HDMI conversion circuit and device with SDI multiplexing function, such as... Figure 1 As shown, see also Figure 2 and Figure 3 Including SDI input interface ( Figure 1 SDI input 1), SDI input / loopout interface ( Figure 1 SDI input 2 / SDI loop-out), SDI equalization module ( Figure 1 SDI equalization module 1), SDI equalization / drive module ( Figure 1 10. SDI equalizer / driver module, 11. Control module, 12. SERDES module, 13. Video module, 14. First HDMI output module. Figure 1 HDMI output 1) and second HDMI output module ( Figure 1 HDMI output 2);
[0021] The SDI equalizer module, SDI equalizer / driver module, and video module are all connected to and controlled by the control module.
[0022] The SDI equalizer module and the SDI equalizer / drive module are connected to the SDI input interface and the SDI input / loopout interface, respectively.
[0023] The SERDES module is connected to both the SDI equalizer module and the SDI equalizer / drive module, and is used to adjust and switch input modes and loop-out modes.
[0024] Both the first and second HDMI output modules are connected to the video module for HDMI signal output.
[0025] By controlling the operation mode switching of the SDI equalizer module, SDI equalizer / drive module and video module through the control module, it is possible to realize the conversion output between SDI and HDMI and the switching between the states of SDI loop-out, thereby realizing the integration of two functions, which can meet a variety of usage scenarios, save structural space and save costs.
[0026] More specifically, the two modes are as follows:
[0027] Mode 1: SDI Input 1 to HDMI Output 1, SDI Input 2 to HDMI Output 2;
[0028] Mode 2: SDI Input 1 to HDMI Output 1, HDMI Output 2, SDI Input 1 loops out from SDI Input 2;
[0029] The working principle is as follows:
[0030] The control module is configured to operate in mode 1. When the SDI equalizer / drive module is in equalizer mode, SDI input 2 and SDI loop-out are used as inputs. The SERDES module is configured to configure all channels as inputs. At the same time, the control module notifies the video module to process the video according to the two-input mode. Finally, two independent and mutually converted video streams are output from HDMI output 1 and HDMI output 2.
[0031] When operating in mode 2, the SDI equalizer / drive module is configured to operate in drive mode. At this time, SDI input 2 / SDI loop-out is used as the loop-out of SDI input 1. The SERDES module is configured to send channel 0 in loop-out mode, looping out the video stream of SDI input 1. At the same time, the control module notifies the video module that it is in SDI input 1 and SDI input 1 loop-out mode. At this time, the video streams of HDMI1 output and HDMI2 output both come from SDI1 input.
[0032] It should be noted that the configuration of the above modules and the switching of working modes all use the functions inherent in the modes themselves, and do not involve any improvement to the computer software program.
[0033] As an example, the circuit for SDI input 1 can be adopted as follows: Figure 2 The circuit shown, the SDI input 2 / SDI loop-out circuit can be adopted as follows: Figure 2 The circuit shown is for illustrative purposes only and is not intended to limit the application of other existing circuit configurations.
[0034] Preferably, the SDI equalization module uses the LMH1239 chip. This model is only for illustrative purposes and is not intended to limit the scope. Those skilled in the art can also use a chip with the same function as the replacement.
[0035] Preferably, the SDI equalization / drive module uses the LMH1297 chip. This model is only for illustrative purposes and is not intended to limit the scope. Those skilled in the art can also use a chip with the same function as the replacement.
[0036] Preferably, the SERDES module uses a chip model XCAU15P. This model is only for illustrative purposes and is not intended to limit the scope. Those skilled in the art can also use a chip with the same function as the replacement.
[0037] Preferably, the control module uses the STM32F103 chip. This model is only for illustrative purposes and is not intended to limit the scope. Those skilled in the art can also use a chip with the same function as the control module.
[0038] An HDMI converter with SDI multiplexing function is provided, wherein the converter is provided with an HDMI converter circuit with SDI multiplexing function as described above.
[0039] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.
Claims
1. An HDMI conversion circuit with SDI multiplexing function, characterized in that, It includes an SDI input interface, an SDI input / loop-out interface, an SDI equalizer module, an SDI equalizer / drive module, a control module, a SERDES module, a video module, a first HDMI output module, and a second HDMI output module; The SDI equalizer module, the SDI equalizer / drive module, and the video module are all connected to and controlled by the control module. The SDI equalization module and the SDI equalization / drive module are respectively connected to the SDI input interface and the SDI input / loopout interface; The SERDES module is connected to both the SDI equalization module and the SDI equalization / drive module, and is used to adjust and switch the input mode and loop-out mode. Both the first HDMI output module and the second HDMI output module are connected to the video module for HDMI signal output.
2. The HDMI conversion circuit with SDI multiplexing function according to claim 1, characterized in that, The SDI equalization module uses the LMH1239 chip.
3. The HDMI conversion circuit with SDI multiplexing function according to claim 1, characterized in that, The SDI equalization / drive module uses the LMH1297 chip.
4. The HDMI conversion circuit with SDI multiplexing function according to claim 1, characterized in that, The SERDES module uses a chip model XCAU15P.
5. An HDMI converter with SDI multiplexing function, characterized in that, The device is provided with an HDMI conversion circuit with SDI multiplexing function as described in any one of claims 1-4.