CN111818287A - Wireless video and audio transmitter and wireless video and audio transmission method - Google Patents
Wireless video and audio transmitter and wireless video and audio transmission method Download PDFInfo
- Publication number
- CN111818287A CN111818287A CN202010631369.8A CN202010631369A CN111818287A CN 111818287 A CN111818287 A CN 111818287A CN 202010631369 A CN202010631369 A CN 202010631369A CN 111818287 A CN111818287 A CN 111818287A
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- hdmi
- video
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- voltage
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/765—Interface circuits between an apparatus for recording and another apparatus
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H04N5/268—Signal distribution or switching
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention relates to the field of video and audio, in particular to a wireless video and audio transmitter, which comprises: the HDMI connection interface is used for providing an interface for connecting with an external device, wherein a DDC bus is arranged on the HDMI connection interface, and a high potential is arranged on the DDC bus and represents that the HDMI connection interface is connected with the external device; the 5V voltage limiting module is used for judging whether the voltage on a voltage input pin on the HDMI connection interface is a high potential or not; an HDMI transmitter; an HDMI receiver; a video control signal switch; and the main control module is used for controlling the video control signal switch to be switched on the HDMI receiver when the judgment result of the 5V voltage limiting module is a high potential.
Description
Technical Field
The invention relates to the field of audio and video, in particular to a wireless audio and video transmitter and a wireless audio and video transmission method.
Background
In the prior art, the external devices connected to the wireless video/audio transmitter are both the transmitting end (Tx) and the receiving end (Rx) of the wireless video/audio transmitter, and usually a user needs to distinguish which external device is the transmitting end or the receiving end of the wireless video/audio transmitter, so that some troubles are encountered in the installation situation of the devices.
Therefore, the technical scheme has the main starting point of simplifying factory production and manufacture, can produce hardware and software of the same section, can automatically judge whether the connected external equipment is Tx or Rx by the wireless video transmitter, and can be simply erected and used by an end user.
Disclosure of Invention
An object of an embodiment of the present invention is to provide a novel wireless video transmitter and a wireless video transmission method, which can automatically determine whether an external device connected to the wireless video transmitter is Tx or Rx, so that an end user can easily set up and use the wireless video transmitter.
In order to solve the above technical problems, the present invention provides a wireless video transmitter, including: the HDMI connection interface is used for providing an interface for connecting with an external device, wherein a DDC bus is arranged on the HDMI connection interface, and a high potential is arranged on the DDC bus and represents that the HDMI connection interface is connected with the external device;
the 5V voltage limiting module is used for judging whether the voltage on a voltage input pin on the HDMI connection interface is a high potential or not;
an HDMI transmitter;
an HDMI receiver;
a video control signal switch;
and the main control module is used for controlling the video control signal switch to be switched on the HDMI receiver when the judgment result of the 5V voltage limiting module is a high potential.
Preferably, the main control module is further configured to control the video control signal switch to turn on the HDMI transmitter when the determination result of the 5V voltage limiting module is a low potential.
Preferably, the main control module is further configured to change the DDC bus to be set to pull up when the video control signal switch turns on the HDMI transmitter, output a high voltage, and notify the external device that the HDMI transmitter is connected, and perform information exchange with the external device.
Preferably, the main control module is further configured to change the DDC bus to be set to pull up when the video control signal switch is turned on the HDMI receiver, output a high voltage, and notify the external device that the HDMI receiver is ready to receive a signal in response to the external device supporting hot plug.
Preferably, the main control module controls the DDC bus to output a low voltage when the external device is removed or turned off, and the wireless audio/video device enters a waiting state.
The invention also provides a wireless audio-video transmission method, which is used in a wireless audio-video transmitter, wherein the wireless audio-video transmitter is provided with an HDMI (high-definition multimedia interface) for providing an interface for connecting with external equipment, and the method comprises the following steps:
detecting whether the voltage on a DDC bus of the HDMI connection interface is high potential;
a high potential is arranged on the DDC bus to indicate that the HDMI connection interface is connected with the external equipment;
judging whether the voltage on a voltage input pin on the HDMI connection interface is a high potential or not;
and if the voltage on the voltage input pin on the HDMI connection interface is high potential, setting the video wireless audio-video transmitter as an HDMI receiver.
Preferably, if the voltage on the voltage input pin of the HDMI connection interface is a low voltage level, the video/audio transmitter is set as the HDMI transmitter.
Preferably, the step of setting the video/audio transmitter as the HDMI sink includes:
changing the DDC bus setting to pull-up, outputting a high voltage, and notifying the external device that the HDMI transmitter is connected, and exchanging information with the external device
Preferably, the step of setting the video/audio transmitter as the HDMI transmitter includes: and changing the DDC bus to be pulled up, outputting high voltage, and responding to the fact that the external equipment supports hot plug, and informing the external equipment that the HDMI receiver is ready to receive signals.
Preferably, the method further comprises: and when the external equipment is removed or turned off, the DDC bus is controlled to output low voltage, and the wireless audio and video equipment enters a waiting state.
The invention has the beneficial effects that: whether external equipment is connected or not is determined by detecting the voltage on the DDC bus, then the main control module controls the video control signal switch to switch on the HDMI receiver or the HDMI transmitter according to the judgment result of the 5V voltage limiting module, and further the wireless video and audio transmitter can judge whether the connected external equipment is Tx or Rx by self, and an end user can simply erect and use the wireless video and audio transmitter.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.
Fig. 1 is a schematic structural diagram of a wireless audio/video transmitter according to an embodiment of the present invention;
fig. 2 is a flowchart of a wireless video transmission method according to an embodiment of the invention.
The reference numerals are explained below:
5V voltage limiting module 102
Video control signal switch 106
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in order to provide a better understanding of the present application in various embodiments of the present invention. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments. The following embodiments are divided for convenience of description, and should not constitute any limitation to the specific implementation manner of the present invention, and the embodiments may be mutually incorporated and referred to without contradiction.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a wireless video/audio transmitter according to an embodiment of the present invention.
In this embodiment, the wireless audio/video transmitter 10 includes: HDMI connection interface 101, 5V voltage limit module 102, main control module 103, HDMI receiver 104, HDMI transmitter 105, and video control signal switch 106.
In this embodiment, the HDMI connection interface 101 is used to provide an interface for connecting with an external device, wherein the HDMI connection interface 101 has a DDC bus 101a thereon, and a high voltage is present on the DDC bus 101a to indicate that the HDMI connection interface 101 has been connected with the external device.
In this embodiment, the 5V voltage limiting module 102 is configured to determine whether a voltage on a voltage input pin of the HDMI connection interface 101 is a high voltage level. In this embodiment, the high potential is 5V, and a potential lower than 5V is referred to as a low potential.
In this embodiment, the main control module 103 is configured to control the video control signal switch 106 to turn on the HDMI receiver 104 when the determination result of the 5V voltage limiting module 102 is a high level.
In this embodiment, the 5V voltage limiting module 102, the main control module 103, the HDMI receiver 104, and the HDMI transmitter 105 may be integrated SOCs or may be a single SOC.
In this embodiment, the main control module 103 is further configured to change the setting of the DDC bus 101a to pull up when the video control signal switch 106 turns on the HDMI receiver 104, output a high voltage, and notify the external device that the HDMI receiver 104 is ready to receive signals in response to the external device supporting hot plug.
In this embodiment, the main control module 103 is further configured to change the DDC bus 101a to be pulled up when the video control signal switch 106 turns on the HDMI transmitter 105, output a high voltage, notify the external device that the HDMI transmitter 105 is connected, and exchange information with the external device.
In this embodiment, the main control module 103 is further configured to control the video control signal switch 102 to turn on the HDMI transmitter 105 when the determination result of the 5V voltage limiting module 102 is a low voltage level.
In this embodiment, the main control module 103 controls the DDC bus 101a to output a low voltage when the external device is removed or turned off, and the wireless audio/video device 10 enters a waiting state.
Referring to fig. 2, fig. 2 is a flowchart illustrating a wireless video transmission method according to an embodiment of the invention.
In this embodiment, the wireless audio/video transmission method is used in a wireless audio/video transmitter 10, the wireless audio/video transmitter 10 is provided with an HDMI connection interface 101 for providing an interface for connecting with an external device, and the method includes the following steps:
step S10 of detecting whether or not the voltage on the DDC bus 101a of the HDMI connection interface 101 is high;
in this embodiment, the voltage on the DDC bus 101a is high, indicating that the HDMI connection interface 101 has been connected to the external device.
Step S20, the 5V voltage limiting module 102 determines whether the voltage on the voltage input pin of the HDMI connection interface 101 is a high voltage level;
if the voltage on the voltage input pin of the HDMI connection interface 101 is high, in step S30, the main control module 103 sets the video/audio transmitter as the HDMI receiver 104. In this embodiment, the main control module 103 controls the video control signal switch 106 to turn on the HDMI receiver 104 when the determination result of the 5V voltage limiting module 102 is high.
In this embodiment, if the voltage on the voltage input pin of the HDMI connection interface 101 is low, in step S40, the main control module 103 sets the wireless video transmitter 10 as the HDMI transmitter 105. In this embodiment, the main control module 103 controls the video control signal switch 106 to turn on the HDMI transmitter 105 when the determination result of the 5V voltage limiting module 102 is low.
In this embodiment, the step of setting the wireless audiovisual transmitter 10 as the HDMI receiver 104 in step S30 includes:
the DDC bus 101a is changed to be pulled up, outputs a high voltage, and notifies the external device that the HDMI transmitter 104 is connected, and performs information exchange with the external device.
In the present embodiment, the step of setting the wireless av transmitter 10 to be the HDMI transmitter 105 includes: changing the DDC bus 101a to pull-up, outputting a high voltage, and in response to the external device supporting hot-plugging, informing the external device that the HDMI receiver 105 is ready to receive signals.
In this embodiment, if the external device is removed or turned off, or the voltage on the DDC bus 101a of the HDMI connection interface 101 is detected to be low, in step S50, the main control module 103 controls the DDC bus 101a to output low voltage, and the wireless audio/video device 10 enters a waiting state.
The invention has the beneficial effects that: whether external equipment is connected or not is determined by detecting the voltage on the DDC bus, then the main control module controls the video control signal switch to switch on the HDMI receiver or the HDMI transmitter according to the judgment result of the 5V voltage limiting module, and further the wireless video and audio transmitter can judge whether the connected external equipment is Tx or Rx by self, and an end user can simply erect and use the wireless video and audio transmitter.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of protection of the present application is not to be construed as being limited.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.
Claims (10)
1. A wireless audio-visual transmitter, comprising:
the HDMI connection interface is used for providing an interface for connecting with an external device, wherein a DDC bus is arranged on the HDMI connection interface, and a high potential is arranged on the DDC bus and represents that the HDMI connection interface is connected with the external device;
the 5V voltage limiting module is used for judging whether the voltage on a voltage input pin on the HDMI connection interface is a high potential or not;
an HDMI transmitter;
an HDMI receiver;
a video control signal switch;
and the main control module is used for controlling the video control signal switch to be switched on the HDMI receiver when the judgment result of the 5V voltage limiting module is a high potential.
2. The wireless video/audio transmitter of claim 1, wherein:
the main control module is further used for controlling the video control signal switch to be connected with the HDMI transmitter when the judgment result of the 5V voltage limiting module is a low potential.
3. The wireless video/audio transmitter of claim 2, wherein:
the main control module is further used for changing the DDC bus to be pulled up when the video control signal switch is connected with the HDMI receiver, outputting high voltage, informing the external equipment that the HDMI transmitter is connected, and exchanging information with the external equipment.
4. The wireless video/audio transmitter of claim 1, wherein:
the main control module is also used for changing the DDC bus to be pulled up when the video control signal switch is switched on the HDMI receiver, outputting high voltage, responding that the external equipment supports hot plugging, and informing the external equipment that the HDMI receiver is ready to receive signals.
5. The wireless video/audio transmitter according to claim 1 or 4, wherein the main control module controls the DDC bus to output a low voltage when the external device is removed or turned off, and the wireless video/audio device enters a waiting state.
6. A wireless video transmission method is used in a wireless video transmitter, the wireless video transmitter is provided with an HDMI connection interface for providing an interface for connecting with external equipment, and the method is characterized by comprising the following steps:
detecting whether the voltage on a DDC bus of the HDMI connection interface is high potential;
the DDC bus is at a high potential and represents that the HDMI connection interface is connected with the external equipment;
judging whether the voltage on a voltage input pin on the HDMI connection interface is a high potential or not;
and if the voltage on the voltage input pin on the HDMI connection interface is high potential, setting the video wireless audio-video transmitter as an HDMI receiver.
7. The wireless video transmission method according to claim 6, further comprising the steps of:
and if the voltage on the voltage input pin on the HDMI connection interface is a low potential, setting the video wireless audio-video transmitter as an HDMI transmitter.
8. The method of claim 7, wherein the step of setting the video transmitter to be the HDMI sink comprises:
and changing the DDC bus to be pulled up, outputting high voltage, informing the external equipment that the HDMI transmitter is connected, and exchanging information with the external equipment.
9. The wireless video transmission method according to claim 6,
the step of setting the video/audio transmitter as the HDMI transmitter includes: and changing the DDC bus to be pulled up, outputting high voltage, and responding to the fact that the external equipment supports hot plug, and informing the external equipment that the HDMI receiver is ready to receive signals.
10. The method for secure updating of remote data according to claim 6 or 9, wherein the method further comprises:
and when the external equipment is removed or turned off, the DDC bus is controlled to output low voltage, and the wireless audio and video equipment enters a waiting state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010631369.8A CN111818287A (en) | 2020-07-03 | 2020-07-03 | Wireless video and audio transmitter and wireless video and audio transmission method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010631369.8A CN111818287A (en) | 2020-07-03 | 2020-07-03 | Wireless video and audio transmitter and wireless video and audio transmission method |
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| Publication Number | Publication Date |
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| CN111818287A true CN111818287A (en) | 2020-10-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010631369.8A Withdrawn CN111818287A (en) | 2020-07-03 | 2020-07-03 | Wireless video and audio transmitter and wireless video and audio transmission method |
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| US20110283129A1 (en) * | 2010-05-05 | 2011-11-17 | Nxp B.V. | System and method for operating an electronic device having an hdmi port that is shared between hdmi source function and an hdmi sink function of the electronic device |
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| CN203788392U (en) * | 2013-12-13 | 2014-08-20 | 乐视致新电子科技（天津）有限公司 | Hdmi signal processing circuit |
| CN104103924A (en) * | 2013-04-02 | 2014-10-15 | 华为终端有限公司 | High definition multimedia interface hdmi interface unit and multimedia terminal |
| CN204539302U (en) * | 2015-02-09 | 2015-08-05 | 李鑫建 | The system of the outside JA(junction ambient) of a kind of automatic identification HDMI |
-
2020
- 2020-07-03 CN CN202010631369.8A patent/CN111818287A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110283129A1 (en) * | 2010-05-05 | 2011-11-17 | Nxp B.V. | System and method for operating an electronic device having an hdmi port that is shared between hdmi source function and an hdmi sink function of the electronic device |
| CN202798972U (en) * | 2012-09-18 | 2013-03-13 | 深圳创维－Rgb电子有限公司 | HDMI (high-definition multimedia interface) recognition circuit and television |
| CN103024435A (en) * | 2012-12-21 | 2013-04-03 | 深圳Tcl新技术有限公司 | HDMI (high-definition multimedia interface) interface detection device and method and HDMI interface system |
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Application publication date: 20201023 |