HDMI coaxial extender

Abstract

The utility model provides an HDMI (High Definition Multimedia Interface) coaxial extender. The HDMI coaxial extender comprises a transmitting end and a receiving end which are connected through a coaxial line, the transmitting end comprises a to-be-extended HDMI signal input end, a first audio and video processing chip, a first signal conversion chip, a coding chip, a first audio main control chip, a coding control chip and an output interface; the receiving end comprises an input interface, a second audio and video processing chip, a second signal conversion chip, a decoding chip, a second audio master control chip, a decoding control chip and an HDMI signal output end. According to the HDMI coaxial extender provided by the invention, audio embedding and stripping can be realized; audio and video signals can be converted into TTL (Transistor-Transistor Logic) type signals convenient to transmit; and the converted signal is coded and then decoded through the coding and decoding chip, so that the purpose of further improving the transmission distance of the HDMI signal can be achieved. Therefore, the transmission efficiency of the HDMI signal is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of signal transmission, in particular to an HDMI coaxial extender. Background Art

[0002] Coaxial cable, full name coaxial transmission line, is a transmission line for transmitting high-frequency power. Since coaxial cable can transmit analog and digital signals in a low-loss manner, it is widely used in various fields.

[0003] However, coaxial cables are usually used to transmit SDI signals, and the efficiency of signal transmission is low. Moreover, HDMI signals are more common nowadays. Therefore, how to provide an HDMI coaxial extender with higher signal transmission efficiency is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0004] The present application proposes an HDMI coaxial extender, aiming to solve the technical problem of how to provide an HDMI coaxial extender with higher signal transmission efficiency.

[0005] In order to solve the above problems, the present application proposes an HDMI coaxial extender, which includes a transmitting end and a receiving end connected by a coaxial line; the transmitting end includes: an HDMI signal input end to be extended, a first audio and video processing chip, a first signal conversion chip, a coding chip, a first audio main control chip, a coding control chip and an output interface; the receiving end includes: an input interface, a second audio and video processing chip, a second signal conversion chip, a decoding chip, a second audio main control chip, a decoding control chip, and an HDMI signal output end;

[0006] The first audio and video processing chip is connected to the HDMI signal input terminal to be extended, the first audio main control chip, and the first signal conversion chip;

[0007] The first audio main control chip is connected to the first signal conversion chip;

[0008] The encoding control chip is connected to the first signal conversion chip, the encoding chip, and the first audio and video processing chip;

[0009] The encoding chip is connected to the first signal conversion chip and the output interface;

[0010] The second audio and video processing chip is connected to the HDMI signal output terminal, the second audio main control chip, and the second signal conversion chip;

[0011] The decoding control chip is connected to the second signal conversion chip, the decoding chip, and the second audio and video processing chip;

[0012] The second audio main control chip is connected to the second signal conversion chip;

[0013] The decoding chip is connected to the second signal conversion chip and the input interface;

[0014] The output interface is connected to the input interface.

[0015] In one embodiment, the transmitting end further includes: an AUDIO dip switch and an analog audio input port;

[0016] The AUDIO dial switch is connected to the first audio main control chip;

[0017] The analog audio input port is connected to the first audio and video processing chip.

[0018] In one embodiment, the transmitting end further includes: an EDID dip switch;

[0019] The EDID dip switch is connected to the first audio main control chip.

[0020] In one embodiment, the transmitting end further includes a first firmware upgrade interface, and the receiving end further includes a second firmware upgrade interface;

[0021] The first firmware upgrade interface is connected to the first audio main control chip;

[0022] The second firmware upgrade interface is connected to the first audio main control chip.

[0023] In one embodiment, the transmitting end further comprises: a first IR transmitting interface and a first IR receiving interface;

[0024] The first IR transmitting interface and the first IR receiving interface are both connected to the first signal conversion chip.

[0025] In one embodiment, the receiving end further comprises: a second IR transmitting interface and a second IR receiving interface;

[0026] The second IR transmitting interface and the second IR receiving interface are both connected to the second signal conversion chip.

[0027] In one embodiment, the transmitting end further includes: a first power supply module;

[0028] The first power module is connected to the first audio and video processing chip, the first signal conversion chip, the encoding chip, the first audio main control chip and the encoding control chip.

[0029] In one embodiment, the receiving end further includes: a second power supply module;

[0030] The second power supply module is connected to the second audio and video processing chip, the second signal conversion chip, the decoding chip, the second audio main control chip and the decoding control chip.

[0031] In one embodiment, the first audio and video processing chip is GSV2002, the first signal conversion chip is NS5304, the encoding chip is NS5734, the first audio main control chip is N32G435CBL7, and the encoding control chip is NS1083A;

[0032] The second audio and video processing chip is model GSV2002, the second signal conversion chip is model NS5305, the decoding chip is model NS5735, the second audio main control chip is model N32G435CBL7, and the decoding control chip is model NS1301.

[0033] In one embodiment, the first audio master control chip is connected to the encoding control chip via an RST pin; and the second audio master control chip is connected to the decoding control chip via an RST pin.

[0034] In the present application, the HDMI coaxial extender includes a transmitting end and a receiving end connected by a coaxial line; the transmitting end includes: an HDMI signal input end to be extended, a first audio and video processing chip, a first signal conversion chip, an encoding chip, a first audio main control chip, an encoding control chip and an output interface; the receiving end includes: an input interface, a second audio and video processing chip, a second signal conversion chip, a decoding chip, a second audio main control chip, a decoding control chip, and an HDMI signal output end; the first audio and video processing chip is connected to the HDMI signal input end to be extended, the first audio main control chip, and the first signal conversion chip; the first audio main chip is connected to the first signal The first signal conversion chip is connected to the encoding control chip; the encoding chip is connected to the first signal conversion chip, the encoding chip, and the first audio and video processing chip; the encoding chip is connected to the first signal conversion chip and the output interface; the second audio and video processing chip is connected to the HDMI signal output terminal, the second audio main control chip, and the second signal conversion chip; the decoding control chip is connected to the second signal conversion chip, the decoding chip, and the second audio and video processing chip; the second audio main control chip is connected to the second signal conversion chip; the decoding chip is connected to the second signal conversion chip and the input interface; the output interface is connected to the input interface.

[0035] In the HDMI coaxial extender proposed in the present application, during the transmission of the HDMI signal through the coaxial line, the processing function of the audio and video processing chip can realize the embedding and stripping of audio; the conversion function of the signal conversion chip can convert the audio and video signals into TTL signals that are easy to transmit; and then the converted signals are encoded and decoded by the codec chip, so as to further improve the transmission distance of the HDMI signal. Therefore, the HDMI signal extender proposed in the present application improves the transmission efficiency of the HDMI signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0037] Figure 1 This is a schematic diagram of module connection of the first embodiment of the HDMI coaxial extender of the present application;

[0038] Figure 2 This is a schematic diagram of module connections of another embodiment of the HDMI coaxial extender of the present application.

[0039] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings.

[0040] Description of Figure Numbers:

[0041] 10, transmitting end; 20, receiving end; 101, HDMI signal input end to be extended; 102, first audio and video processing chip; 103, first signal conversion chip; 104, encoding chip; 105, first audio main control chip; 106, encoding control chip; 107, output interface; 201, input interface; 202, second audio and video processing chip; 203, second signal conversion chip; 204, decoding chip; 205, second audio main control chip; 206, decoding control chip; 207, HDMI signal output end; 108, AUDIO dip switch; 109, analog audio input port; 110, EDID dip switch; 111, first firmware upgrade interface; 208, second firmware upgrade interface. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0043] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0044] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0045] Based on the above, the first embodiment of the HDMI coaxial extender of the present application is proposed. Figure 1 , Figure 1 This is a schematic diagram of module connections of the first embodiment of the HDMI coaxial extender of the present application.

[0046] In this embodiment, the HDMI coaxial extender includes a transmitting end 10 and a receiving end 20 connected by a coaxial line; the transmitting end 10 includes: an HDMI signal input end 101 to be extended, a first audio and video processing chip 102, a first signal conversion chip 103, a coding chip 104, a first audio main control chip 105, a coding control chip 106 and an output interface 107; the receiving end 20 includes: an input interface 201, a second audio and video processing chip 202, a second signal conversion chip 203, a decoding chip 204, a second audio main control chip 205, a decoding control chip 206, and an HDMI signal output end 207;

[0047] The first audio and video processing chip 102 is connected to the HDMI signal input terminal 101 to be extended, the first audio main control chip 105, and the first signal conversion chip 103;

[0048] The first audio main control chip 105 is connected to the first signal conversion chip 103;

[0049] The encoding control chip 106 is connected to the first signal conversion chip 103, the encoding chip 104, and the first audio and video processing chip 102;

[0050] The encoding chip 104 is connected to the first signal conversion chip 103 and the output interface 107;

[0051] The second audio and video processing chip 202 is connected to the HDMI signal output terminal 207, the second audio main control chip 205, and the second signal conversion chip 203;

[0052] The decoding control chip 206 is connected to the second signal conversion chip 203, the decoding chip 204, and the second audio and video processing chip 202;

[0053] The second audio main control chip 205 is connected to the second signal conversion chip 203;

[0054] The decoding chip 204 is connected to the second signal conversion chip 203 and the input interface 201;

[0055] The output interface 107 is connected to the input interface 201 .

[0056] It is understandable that the first audio and video processing chip 102 and the second audio and video processing chip 202 both have functions such as audio embedding and audio stripping. The first audio main control chip 105 and the second audio main control chip 205 are used to control the audio processing process, the first signal conversion chip 103 and the second signal conversion chip 203 are used to convert HDMI signals, the encoding control chip 106 controls the encoding process of the converted HDMI signal, and the decoding control chip 206 controls the decoding process of the converted HDMI signal. The encoding chip 104 and the decoding chip 204 play the role of encoding and decoding. It should be noted that the control function mentioned in the above explanation of the chip refers to the built-in function of the chip that has been sold on the market. This application is only based on the connection method between chips and chips and chips and interfaces to achieve the purpose of extending the HDMI transmission distance.

[0057] Please refer to Figure 2 In a feasible implementation manner, the transmitting end 10 further includes: an AUDIO dip switch 108 and an analog audio input port 109;

[0058] The AUDIO DIP switch 108 is connected to the first audio main control chip 105;

[0059] The analog audio input port 109 is connected to the first audio and video processing chip 102 .

[0060] In a feasible implementation manner, the transmitting end 10 further includes: an EDID dip switch 110;

[0061] The EDID dip switch 110 is connected to the first audio main control chip 105 .

[0062] In a feasible implementation manner, the transmitting end 10 further includes a first firmware upgrade interface 111, and the receiving end 20 further includes a second firmware upgrade interface 208;

[0063] The first firmware upgrade interface 111 is connected to the first audio main control chip 105;

[0064] The second firmware upgrade interface 208 is connected to the first audio main control chip 105 .

[0065] It is understandable that, in addition to extending the transmission distance of HDMI signals, the present application can also extend the transmission distance of analog audio signals. Specifically, when the AUDIO dip switch 108 is connected to the first audio master chip 105, if the audio source input selected by the AUDIO dip switch 108 is an HDMI signal, the transmission distance of the HDMI signal can be extended; if the audio source input selected by the AUDIO dip switch 108 is an analog audio signal, the transmission distance of the analog audio signal can be extended.

[0066] The EDID dip switch 110 can modify the parameters of the HDMI signal transmitted by the transmitter according to the correspondence between the set code and the display parameters of the display, for example, the resolution and refresh rate of the HDMI signal can be modified.

[0067] For example, when the EDID dip switch 110 is set to 00, the parameters can be modified to the resolution and refresh rate of the display connected to the receiving end 20; when the EDID dip switch 110 is set to 01, the parameters can be modified to the resolution and refresh rate of the display connected to the transmitting end 10; when the EDID dip switch 110 is set to 10, the parameters can be modified to 1080p@60Hz, Audio 2ch PCM; when the EDID dip switch 110 is set to 11, the parameters can be modified to HDMI4K@60Hz 4:4:4, Audio5.1ch PCM / DTS / DOLBY. Thus, different transmission parameters can be given based on the value of the EDID dip switch 110.

[0068] In this embodiment, in order to facilitate chip updating, a firmware upgrade interface is provided to improve the efficiency of signal transmission.

[0069] In a feasible implementation manner, the transmitting end 10 further includes: a first IR transmitting interface (not shown in the figure) and a first IR receiving interface (not shown in the figure);

[0070] The first IR transmitting interface and the first IR receiving interface are both connected to the first signal conversion chip 103 .

[0071] In a feasible implementation manner, the receiving end 20 further includes: a second IR transmitting interface and a second IR receiving interface;

[0072] The second IR transmitting interface and the second IR receiving interface are both connected to the second signal conversion chip 203 .

[0073] It is understandable that the IR signal in the present application is bidirectionally transmitted. That is, in the present application, the signal can not only be transmitted from the HDMI signal input terminal 101 to be extended to the HDMI signal output terminal 207, but also be transmitted from the HDMI signal output terminal 207 to the HDMI signal input terminal 101 to be extended. Specifically, in the present application, both the transmitting terminal 10 and the receiving terminal 20 are provided with an IR transmitting interface and an IR receiving interface, so that the signal can be transmitted not only based on the parameters of the display device connected to the transmitting terminal 10, but also based on the display parameters of the display of the receiving terminal 20, thereby realizing bidirectional IR control.

[0074] In a feasible implementation manner, the transmitting end 10 further includes: a first power supply module (not shown in the figure);

[0075] The first power module is connected to the first audio and video processing chip 102 , the first signal conversion chip 103 , the encoding chip 104 , the first audio main control chip 105 and the encoding control chip 106 .

[0076] In a feasible implementation manner, the receiving end 20 further includes: a second power supply module (not shown in the figure);

[0077] The second power supply module is connected to the second audio and video processing chip 202 , the second signal conversion chip 203 , the decoding chip 204 , the second audio main control chip 205 and the decoding control chip 206 .

[0078] It is understandable that the power supply module is used to supply power to each chip involved in the present application. The first power supply module and the second power supply module may be built-in or external, and the present application does not limit this.

[0079] In a feasible implementation manner, the first audio and video processing chip is GSV2002, the first signal conversion chip is NS5304, the encoding chip is NS5734, the first audio main control chip is N32G435CBL7, and the encoding control chip is NS1083A;

[0080] The second audio and video processing chip is model GSV2002, the second signal conversion chip is model NS5305, the decoding chip is model NS5735, the second audio main control chip is model N32G435CBL7, and the decoding control chip is model NS1301.

[0081] In a feasible implementation manner, the first audio main control chip 105 is connected to the encoding control chip 106 via an RST pin; and the second audio main control chip 205 is connected to the decoding control chip 206 via an RST pin.

[0082] In this embodiment, the present application realizes a coaxial extender that can extend the transmission distance of HDMI signals through the above-mentioned chips. Specifically, when the chips involved in the present application are of the above-mentioned models, the coaxial line connecting the output interface and the input interface can be 100 meters.

[0083] Of course, in a feasible implementation, in order to facilitate observation, you can also set a power indicator light, a connection status indicator light between the transmitter and the receiver, a display light that shows whether the device is in an access state, etc. This application does not impose any restrictions on this.

[0084] In the HDMI coaxial extender proposed in the present application, during the transmission of the HDMI signal through the coaxial line, the processing function of the audio and video processing chip can realize the embedding and stripping of audio; the conversion function of the signal conversion chip can convert the audio and video signals into TTL signals that are easy to transmit; and then the converted signals are encoded and decoded by the codec chip, so as to further improve the transmission distance of the HDMI signal. Therefore, the HDMI signal extender proposed in the present application improves the transmission efficiency of the HDMI signal.

[0085] The above are only optional embodiments of the present invention, and do not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An HDMI coaxial extender, characterized in that: The HDMI coaxial extender comprises a transmitting end and a receiving end connected by a coaxial line; the transmitting end comprises: an HDMI signal input end to be extended, a first audio and video processing chip, a first signal conversion chip, a coding chip, a first audio main control chip, a coding control chip and an output interface; the receiving end comprises: an input interface, a second audio and video processing chip, a second signal conversion chip, a decoding chip, a second audio main control chip, a decoding control chip, and an HDMI signal output end; The first audio and video processing chip is connected to the HDMI signal input terminal to be extended, the first audio main control chip, and the first signal conversion chip; The first audio main control chip is connected to the first signal conversion chip; The encoding control chip is connected to the first signal conversion chip, the encoding chip, and the first audio and video processing chip; The encoding chip is connected to the first signal conversion chip and the output interface; The second audio and video processing chip is connected to the HDMI signal output terminal, the second audio main control chip, and the second signal conversion chip; The decoding control chip is connected to the second signal conversion chip, the decoding chip, and the second audio and video processing chip; The second audio main control chip is connected to the second signal conversion chip; The decoding chip is connected to the second signal conversion chip and the input interface; The output interface is connected to the input interface.

2. The HDMI coaxial extender according to claim 1, wherein: The transmitting end also includes: an AUDIO dial switch and an analog audio input port; The AUDIO dial switch is connected to the first audio main control chip; The analog audio input port is connected to the first audio and video processing chip.

3. The HDMI coaxial extender according to claim 1, wherein: The transmitting end also includes: an EDID dip switch; The EDID dip switch is connected to the first audio main control chip.

4. The HDMI coaxial extender according to claim 1, wherein: The transmitting end further includes a first firmware upgrade interface, and the receiving end further includes a second firmware upgrade interface; The first firmware upgrade interface is connected to the first audio main control chip; The second firmware upgrade interface is connected to the first audio main control chip.

5. The HDMI coaxial extender according to claim 1, wherein: The transmitting end also includes: a first IR transmitting interface and a first IR receiving interface; The first IR transmitting interface and the first IR receiving interface are both connected to the first signal conversion chip.

6. The HDMI coaxial extender according to claim 1, wherein: The receiving end also includes: a second IR transmitting interface and a second IR receiving interface; The second IR transmitting interface and the second IR receiving interface are both connected to the second signal conversion chip.

7. The HDMI coaxial extender according to claim 1, wherein: The transmitting end also includes: a first power supply module; The first power module is connected to the first audio and video processing chip, the first signal conversion chip, the encoding chip, the first audio main control chip and the encoding control chip.

8. The HDMI coaxial extender according to claim 1, wherein: The receiving end also includes: a second power supply module; The second power supply module is connected to the second audio and video processing chip, the second signal conversion chip, the decoding chip, the second audio main control chip and the decoding control chip.

9. The HDMI coaxial extender according to claim 1, wherein: The first audio and video processing chip is GSV2002, the first signal conversion chip is NS5304, the encoding chip is NS5734, the first audio main control chip is N32G435CBL7, and the encoding control chip is NS1083A; The second audio and video processing chip is model GSV2002, the second signal conversion chip is model NS5305, the decoding chip is model NS5735, the second audio main control chip is model N32G435CBL7, and the decoding control chip is model NS1301.

10. The HDMI coaxial extender according to claim 9, characterized in that: The first audio master chip is connected to the encoding control chip via an RST pin; the second audio master chip is connected to the decoding control chip via an RST pin.

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