CN106980559A - One kind detects circuit and Multimedia Transmission System based on HDMI hot plugs - Google Patents
One kind detects circuit and Multimedia Transmission System based on HDMI hot plugs Download PDFInfo
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- CN106980559A CN106980559A CN201710090368.5A CN201710090368A CN106980559A CN 106980559 A CN106980559 A CN 106980559A CN 201710090368 A CN201710090368 A CN 201710090368A CN 106980559 A CN106980559 A CN 106980559A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/22—Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing
- G06F11/2205—Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing using arrangements specific to the hardware being tested
- G06F11/221—Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing using arrangements specific to the hardware being tested to test buses, lines or interfaces, e.g. stuck-at or open line faults
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4063—Device-to-bus coupling
- G06F13/4068—Electrical coupling
- G06F13/4081—Live connection to bus, e.g. hot-plugging
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Abstract
The invention discloses a kind of Multimedia Transmission System that circuit and application the detection circuit are detected based on HDMI hot plugs, the detection circuit includes first information passage and the second information channel, second information channel is connected between the multimedia receiver and the multimedia output apparatus, for realizing that the change in electric according to the multimedia receiver is corresponding to multimedia output apparatus output high level or low level, further realize that the multimedia output apparatus correspondence high level or low level carry out the output of the multi-medium data or do not exported.The Multimedia Transmission System includes multimedia output apparatus, the detection circuit of multimedia receiver and connection between.The present invention's detects two-way communication of the circuit realiration between multimedia output apparatus and multimedia receiver, and Multimedia Transmission System of the invention realizes most optimum distribution of resources, reduces the wasting of resources.
Description
Present patent application is the applying date on October 18th, 2013, Application No. 201310491804.1, entitled
The divisional application of the Chinese invention patent application of " one kind detects circuit and Multimedia Transmission System based on HDMI hot plugs ".
Technical field
Circuit and application are detected based on HDMI hot plugs the present invention relates to communication electronics field, more particularly to one kind
The Multimedia Transmission System of the detection circuit.
Background technology
At HDMI (HDMI, English name High Definition Multimedia Interface)
In, the equipment of the multi-medium datas such as output audio frequency and video is called Source equipment (i.e. multimedia output apparatus), reception sound is regarded
The equipment of the multi-medium datas such as frequency is referred to as Sink equipment (i.e. multimedia receiver).The heat of traditional multimedia output apparatus is inserted
Detection is pulled out to depend on the level of HPD (Hot plug hot plugs) port in detection HDMI to realize.I.e.：Multimedia is defeated
Go out the level change that equipment once detects HPD ports, just will be considered that multimedia receiver access, then multimedia is exported
Equipment carries out the transmission of HMDI data at once.That is, Source be indifferent to multimedia receiver resource whether for
Just whether idle condition, that is, be indifferent to whether multimedia receiver carries out the preparation for receiving multi-medium data, regardless of Sink
Dormancy (resource is in a kind of performance of busy state), multimedia output apparatus all can mechanically send multi-medium data.
The shortcoming of the mode of this hot plug is it will be apparent that it not only results in the mistake of data transfer, also to cause huge
The wasting of resources of multimedia output apparatus and multimedia receiver.
Although, can using the method that existing detection module is implanted into multimedia receiver, to detect that multimedia connects
The idle condition of the own resource of receiving unit is to judge whether that the receiving of HDMI signals, still, the detection mould can be carried out at once
The result that block is detected can not be fed back in multimedia output apparatus by existing telecommunication circuit, that is to say, that current is logical
Letter circuit can only be realized to be transmitted to the communication of multimedia receiver by multimedia output apparatus, and can not be realized based on many matchmakers
The own resource testing result of body receiving device and the control signal that triggers generation is delivered to the communication of multimedia output apparatus.
Based on this, electricity is detected present invention improves over the hot plug between multimedia output apparatus and multimedia receiver
Road, and then establish the telecommunication circuit of an achievable above two signal two-way communication.
The content of the invention
It is an object of the invention to open a kind of based on HDMI hot plugs detection circuit, set with realizing for multimedia output
The standby two-way communication between multimedia receiver.
The present invention also aims to disclose a kind of Multimedia Transmission System, to realize in multimedia output apparatus and
Carry out the transmission of multi-medium data when multimedia receiver is ready for ready again, and then realize to multimedia output apparatus and many
The most optimum distribution of resources of media receiver equipment, reduces the wasting of resources.
Based on the first above-mentioned purpose, circuit, the detection electricity are detected based on HDMI hot plugs the invention provides one kind
Road includes first information passage, and the first information passage includes first port and the 4th port of electrical connection, the first end
Mouth is connected with multimedia output apparatus, and the 4th port is connected with multimedia receiver, for realizing by described many
Media output devices export multi-medium data to the multimedia receiver；
The detection circuit also includes the second information channel, and second information channel is connected to the multimedia reception and set
Between standby and described multimedia output apparatus, including the first triode and the second port for connecting the multimedia output apparatus,
And the 3rd port including the second triode and the connection multimedia receiver, connect for realizing according to the multimedia
The change in electric correspondence of receiving unit exports high level or low level to the multimedia output apparatus, further realizes described
The multimedia output apparatus correspondence high level or low level carry out the output of the multi-medium data or not exported.
It is preferred that, the second port connects the first port and is grounded by first triode respectively, passes through
The second port correspondence output high level or low level are realized in the cut-off or conducting of first triode；
Second triode connects the 3rd port and the first triode respectively, passes through the level of the 3rd port
The on or off of second triode is realized in change, and correspondence control first triode is realized cut-off or turned on.
It is preferred that, the colelctor electrode of first triode connects the second port and the first port respectively, described
The grounded emitter of first triode；
The colelctor electrode of second triode connects the base stage of the first port and the first triode, described second respectively
The grounded emitter of triode, the base stage of second triode connects the 3rd port.
It is preferred that, the second port is grounded by a divider resistance.
It is preferred that, the colelctor electrode of first triode connects the first port by another divider resistance.
It is preferred that, the colelctor electrode of second triode and the 4th port are accessed by current-limiting resistance parallel connection respectively
The first port.
It is preferred that, NPN triode is respectively adopted in first triode and second triode.
It is preferred that, the minimum cut-in voltage of first triode and second triode is respectively 1.8V, most high point
Power-off pressure is respectively 0.8V, and the collector current secure threshold after conducting is respectively 10mA.
It is preferred that, the first port and the 4th port are connected to a filter capacitor, each filter capacitor
Ground connection.
Based on the second above-mentioned purpose, the invention provides a kind of Multimedia Transmission System, the system includes many matchmakers
Body receiving device, multimedia output apparatus and described above based on HDMI hot plugs detect circuit, wherein：
The receiving module for receiving multi-medium data is provided with the multimedia receiver and described for detecting
The whether idle detection module of multimedia receiver resource；
Output module for exporting multi-medium data is provided with the multimedia output apparatus and for controlling whether
Export the control module of the multi-medium data；
In the detection circuit based on HDMI hot plugs, its first port connects the output module, and its second port connects
The control module is connect, its 3rd port connects the detection module, its 4th port connects the receiving module；
After the multimedia receiver detects the connection of first information Path Setup, and the detection module is detected
To the multimedia receiver resource be in idle condition when, the detection module draws high the level of the 3rd port,
And then second triode ON is driven, further drive first triode to end, it is height to cause the second port
Level, the control module detects the high level of the second port, and the second information channel sets up connection, the output module
Export the multi-medium data；
After the multimedia receiver detects the connection of first information Path Setup, and the detection module is detected
To the multimedia receiver resource be in busy state when, the detection module drags down the electricity of the 3rd port
It is flat, and then drive second triode to end, first triode ON is further driven, causes the second port to be
Low level, the control module is detected after the low level of the second port, and the output module does not export the multimedia
Data.
In summary, what the present invention was provided detects circuit based on HDMI hot plugs, is ensuring the of transmitting multimedia data
On the basis of the normal work of one information channel, also realized by the second information channel for multimedia receiver to multimedia
The transmission of output equipment feedback information, and then realize the two-way communication that hot plug detects circuit.
Further, the second information channel of the invention can be directly connected to by the mating reaction of two triodes
On first information passage, the level for borrowing the first information passage is realized, electricity is equipped with without being individually for the second information channel
Source so that the structure of hot plug detection circuit is more simplified.
Further, the Multimedia Transmission System that the present invention is also provided, it is to be based on HDMI hot plugs to described
The concrete application of circuit is detected, under the mating reaction of detection module and control module, is realized when multimedia receiver prepares
Multimedia output apparatus starts to transmit multi-medium data when ready, and multimedia is defeated when multimedia receiver is not ready to ready
Go out transmission of the equipment without multi-medium data, and then adequately achieve multimedia receiver and multimedia output apparatus most
Distribute rationally, effectively prevent because multimedia receiver is not ready to the ready wasting of resources with regard to carrying out multimedia data transmission.
Brief description of the drawings
Fig. 1 is the theory diagram that the present invention detects circuit based on HDMI hot plugs；
Fig. 2 is the schematic diagram of embodiment one that the present invention detects circuit based on HDMI hot plugs；
Fig. 3 is the schematic diagram of embodiment two that the present invention detects circuit based on HDMI hot plugs；
Fig. 4 is the embodiment schematic diagram of Multimedia Transmission System of the present invention.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to embodiment party of the present invention
Formula is described in further detail.
Referring to Fig. 1, circuit is detected based on HDMI hot plugs the invention discloses one kind, the detection circuit 100 includes the
One information channel 110, the first information passage 110 includes the first port Port1 and the 4th port Port4 of electrical connection (such as
Shown in Fig. 2), the first port Port1 is connected with multimedia output apparatus 200, the 4th port Port4 and multimedia
Receiving device 300 is connected, and is exported for realizing from the multimedia output apparatus 200 to the multimedia receiver 300
Multi-medium data.On this basis, the detection circuit 100 also includes the second information channel 120, second information channel
120 are connected between the multimedia receiver 300 and the multimedia output apparatus 200, for realizing according to described many
The change in electric of media receiver equipment 300 is entered to the multimedia output apparatus 200 correspondence output high level or low level
One step realizes that the correspondence of multimedia output apparatus 200 high level or low level carry out the output of the multi-medium data
Or do not export.Accordingly, the detection circuit 100 has the information channel 120 of first information passage 110 and second, adequately achieves
The two-way communication of multimedia receiver 300 and multimedia output apparatus 200.
Referring to Fig. 1 and Fig. 2, the present invention detects the embodiment one of circuit based on HDMI hot plugs, and the embodiment is the base
A kind of preferred scheme of circuit is detected in HDMI hot plugs, the program passes through two triode mating reactions, you can complete protecting
Demonstrate,prove on the basis of the existing normal work of first information passage 110, reverse information conveyance is realized by the second information channel 120, its
Circuit structure is simple, and information transfer is fast accurate, and especially, the preferred scheme is connected directly between on first information passage 110,
Without the power supply of the second information channel 120 of ad hoc supply, circuit is further optimized.
Specifically：Second information channel 120 includes the first triode Q1 and connects the multimedia output apparatus
200 second port Port2, and the 3rd port including the second triode Q2 and the connection multimedia receiver 300
Port3.The second port Port2 connects the first port Port1 and is grounded by the first triode Q1, institute respectively
Stating the first triode Q1 can end or turn on, corresponding, and the second port Port2 can correspond to the high electricity of output respectively
Flat or low level；The second triode Q2 connects the 3rd port Port3 and the first triode Q1 respectively, by described
The on or off of the second triode Q2, correspondence control the described 1st are realized in 3rd port Port3 level change
Pole pipe Q1 realizes cut-off or turned on.
During specific connection, for example, it can be but be not limited to connected mode as shown in Figure 2：The first triode Q1's
Colelctor electrode connects the second port Port2 and the first port Port1 respectively, and the emitter stage of the first triode Q1 connects
Ground；The colelctor electrode of the second triode Q2 connects the first port Port1 and the first triode Q1 base stage respectively, described
Second triode Q2 grounded emitter, the base stage of the second triode Q2 connects the 3rd port Port3.
The first port Port1 being connected during specific works and the 4th port Port4 constitutes the first information and led to
Road 110, the multi-medium data is transmitted from the first port Port1 to the 4th port Port4；3rd port
Port3 level change, can control the on or off of the second triode Q2, and then correspondence controls the one or three pole
Pipe Q1 cut-off or conducting, finally realizes second port Port2 correspondence output high level or low level, and the is realized with this
Signal transmission of two information channels 120 from the 3rd port Port3 to the second port Port2.
Referring to Fig. 3, the present invention detects the embodiment two of circuit based on HDMI hot plugs, and the detection circuit is in embodiment
On the basis of further improvement, the technical scheme disclosed in embodiment one falls within the present embodiment, the skill disclosed in embodiment one
Description is not repeated in art scheme.
This embodiment increases two divider resistances of R135 and R136 and R133 and two current-limiting resistances of R134.Wherein：
The 4th port Port4 accesses the first port Port1 by a current-limiting resistance R133, for protecting multimedia reception to set
Standby 300 voltage detecting port；The colelctor electrode of the second triode Q2 passes through another current-limiting resistance R134 connections described first
Port Port1, that is, access the first port Port1, the current-limiting resistance R134 that two current-limiting resistances are in parallel
For protecting the second triode Q2, i.e., for ensuring that its collector current is no more than secure threshold during the second triode Q2 conductings；
The colelctor electrode of the first triode Q1 is by another divider resistance R135 connections first port Port1, for protecting the
One triode Q1, i.e., for ensuring when the first triode Q1 is turned on, the electric current of its colelctor electrode is no more than secure threshold；Institute
State second port Port2 to be grounded by a divider resistance R136, in the case of being not turned in Q2, Port2 is maintained height
The state of level, prevents Port2 from uncertain voltage status occur, that is to say, that divider resistance R136 is used to ensure Port2 ends
Mouthful level only show as high level or low level state, prevent state in the middle of high level and low level and
Cause electric circuit inspection result inaccurate.
The embodiment also add two filter capacitors C147 and C148, for improve first information passage 110 transmit it is many
The accuracy of media data, specifically, the first port Port1 and the 4th port Port4 are connected to a filtering
Electric capacity, each filter capacitor ground connection.
It is preferred that, the type selecting standard of above-mentioned device：
R133：100 Ω precision no requirement (NR)s.R134：10K Ω precision no requirement (NR)s.
R135：1K Ω precision no requirement (NR)s.R136：270K Ω precision no requirement (NR)s.
C147：10nF/16V precision no requirement (NR)s.C148：100nF/16V precision no requirement (NR)s.
Q1/Q2：Concrete model is PDTC114EU, is a kind of digital triode of NPN type of built-in 10K Ω biasing resistors, most
Small cut-in voltage 1.8V, maximum shut-off voltage 0.8V, collector current secure threshold is 10mA during triode ON.
, can be on the basis of its normal work be ensured, compared with the reduction energy consumption of limits using above-mentioned model standard.
Referring to Fig. 4, the embodiment of Multimedia Transmission System of the present invention is that the present invention detects electricity based on HDMI hot plugs
The concrete application on road, the embodiment is specifically that the application on circuit base is detected with the HDMI hot plugs described in embodiment two, real
Apply the technical scheme disclosed in example two and fall within the present embodiment, description is not repeated in the technical scheme disclosed in embodiment two.
The system includes multimedia receiver 300, multimedia output apparatus 200 and the detection electricity as described in embodiment two
Road 100, wherein：
Receiving module 310 for receiving multi-medium data is provided with the multimedia receiver 300 and for examining
Survey the whether idle detection module 320 of the resource of multimedia receiver 300；
Output module 210 for exporting multi-medium data is provided with the multimedia output apparatus 200 and for controlling
Whether system exports the control module 220 of the multi-medium data；
In the detection circuit 100, including first information passage 110 (referring to Fig. 1) and the second information channel 120 (referring to
Fig. 1).Wherein described first information passage 110 includes the first port Port1 and the 4th port Port4 of electrical connection, described first
Port Port1 is connected with multimedia output apparatus 200, and the 4th port Port4 is connected with multimedia receiver 300
Connect, second information channel 120 includes the first triode Q1 and connects the second port of the multimedia output apparatus 200
Port2, and the 3rd port Port3 including the second triode Q2 and the connection multimedia receiver 300.First port
The Port1 connections output module 210, the second port Port2 connections control module 220, the 3rd port Port3 connections institute
State detection module 320, the 4th port Port4 connections receiving module 310.During specific works, when multimedia output apparatus 200
And/or it is that 5V, the 4th port Port4 voltage are also 5V that multimedia receiver 300, which detects first port Port1 voltages,
When, you can judge there is the insertion of HDMI signals, the i.e. first information between multimedia output apparatus 200 and multimedia receiver 300
Passage 110 is set up.
Fig. 1 and Fig. 4 are refer to, after the foundation connection of first information passage 110 is detected, if detection module 320 is detected
The resource of the multimedia receiver 300 is in busy state, and such as dormancy or resource are being used, can not received many
Media data.Now the 3rd port Port3 is low level, and the base voltage of the second triode Q2 is low so that second
Triode Q2 ends, and the first triode Q1 base stage accesses first port Port1 formation paths by current-limiting resistance R134, therefore
First triode Q1 base voltage is 5V, and then drives the first triode Q1 to turn on, the first triode Q1 of conducting current collection
Electrode current is 5mA, and second port Port2 is grounded by the first triode Q1 turned on, therefore second port Port2 output
For low level.The control module 220 is detected after the low level of the second port Port2, you can judge the multimedia
Receiving device 300 is not ready to ready, and now the output module 210 does not export the multi-medium data.
After the foundation connection of first information passage 110 is detected, and the detection module 320 detects the multimedia
The resource of receiving device 300 be in idle condition when, namely detect the multimedia receiver 300 it is ready when, institute
The level that detection module 320 draws high the 3rd port Port3 is stated, turns on the second triode Q2, now the two or three pole
Pipe Q2 collector current is 0.5mA, and the first triode Q1 base stage is grounded by the second triode Q2 turned on, Ye Jila
Low first triode Q1 base voltage, ends the first triode Q1, now second port Port2 passes through pressure limiting resistance
R135 connection first ports Port1 formation paths, the level of the second port Port2 is height, i.e., close to 5V.The control mould
Block 220 is detected after the high level of the second port Port2, you can judge that the multimedia receiver 300 is ready,
The output module 210 exports the multi-medium data.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the scope of the present invention.It is all
Any modification, equivalent substitution and improvements made within the spirit and principles in the present invention etc., are all contained in protection scope of the present invention
It is interior.
Claims (10)
1. one kind detects circuit based on HDMI hot plugs, the detection circuit includes first information passage, and the first information leads to
Road includes first port and the 4th port of electrical connection, and the first port is connected with multimedia output apparatus, and the described 4th
Port is connected with multimedia receiver, defeated from the multimedia output apparatus to the multimedia receiver for realizing
Go out multi-medium data, it is characterised in that
It is described detection circuit also include the second information channel, second information channel be connected to the multimedia receiver and
Between the multimedia output apparatus, including the first triode and the second port for connecting the multimedia output apparatus, and
The 3rd port including the second triode and the connection multimedia receiver, sets for realizing according to the multimedia reception
Standby change in electric correspondence exports high level or low level to the multimedia output apparatus, further realizes many matchmakers
The body output equipment correspondence high level or low level carry out the output of the multi-medium data or not exported.
2. according to claim 1 detect circuit based on HDMI hot plugs, it is characterised in that the second port connects respectively
Connect the first port and be grounded by first triode, institute is realized by the cut-off or conducting of first triode
State second port correspondence output high level or low level；
Second triode connects the 3rd port and the first triode respectively, is changed by the level of the 3rd port
The on or off of second triode is realized, correspondence control first triode is realized cut-off or turned on.
3. according to claim 2 detect circuit based on HDMI hot plugs, it is characterised in that
The colelctor electrode of first triode connects the second port and the first port respectively, first triode
Grounded emitter；
The colelctor electrode of second triode connects the base stage of the first port and the first triode, the two or three pole respectively
The grounded emitter of pipe, the base stage of second triode connects the 3rd port.
4. according to claim 2 detect circuit based on HDMI hot plugs, it is characterised in that the second port passes through one
Divider resistance is grounded.
5. according to claim 4 detect circuit based on HDMI hot plugs, it is characterised in that the collection of first triode
Electrode connects the first port by another divider resistance.
6. according to claim 2 detect circuit based on HDMI hot plugs, it is characterised in that the collection of second triode
The first port is accessed in electrode and the 4th port by current-limiting resistance parallel connection respectively.
7. according to claim 2 detect circuit based on HDMI hot plugs, it is characterised in that first triode and institute
State the second triode and NPN triode is respectively adopted.
8. according to claim 2 detect circuit based on HDMI hot plugs, it is characterised in that first triode and institute
The minimum cut-in voltage respectively 1.8V of the second triode is stated, maximum shut-off voltage is respectively 0.8V, the colelctor electrode electricity after conducting
It is respectively 10mA to flow secure threshold.
9. circuit is detected based on HDMI hot plugs according to claim 2-8 is any, it is characterised in that the first port
A filter capacitor, each filter capacitor ground connection are connected to the 4th port.
10. a kind of Multimedia Transmission System, it is characterised in that the system includes multimedia receiver, multimedia and exported
Equipment and as described in claim 2-9 based on HDMI hot plugs detect circuit, wherein：
The receiving module for receiving multi-medium data is provided with the multimedia receiver and for detecting many matchmakers
The whether idle detection module of body receiving device resource；
The output module for exporting multi-medium data is provided with the multimedia output apparatus and for controlling whether output
The control module of the multi-medium data；
In the detection circuit based on HDMI hot plugs, its first port connects the output module, its second port connection institute
Control module is stated, its 3rd port connects the detection module, its 4th port connects the receiving module；
After the multimedia receiver detects the connection of first information Path Setup, and the detection module detects institute
When the resource for stating multimedia receiver is in idle condition, the detection module draws high the level of the 3rd port, and then
Second triode ON is driven, further drives first triode to end, it is high level to cause the second port,
The control module detects the high level of the second port, and the second information channel sets up connection, the output module output
The multi-medium data；
After the multimedia receiver detects the connection of first information Path Setup, and the detection module detects institute
When the resource for stating multimedia receiver is in busy state, the detection module drags down the level of the 3rd port, enters
And drive second triode to end, first triode ON is further driven, it is low electricity to cause the second port
Flat, the control module is detected after the low level of the second port, and the output module does not export the multi-medium data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710090368.5A CN106980559B (en) | 2013-10-18 | 2013-10-18 | HDMI (high-definition multimedia interface) -based hot plug detection circuit and multimedia data transmission system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710090368.5A CN106980559B (en) | 2013-10-18 | 2013-10-18 | HDMI (high-definition multimedia interface) -based hot plug detection circuit and multimedia data transmission system |
| CN201310491804.1A CN103577289B (en) | 2013-10-18 | 2013-10-18 | HDMI (high-definition multimedia interface)-based hot plug detection circuit and multimedia data transmission system using same |
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| CN201310491804.1A Division CN103577289B (en) | 2013-10-18 | 2013-10-18 | HDMI (high-definition multimedia interface)-based hot plug detection circuit and multimedia data transmission system using same |
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| CN106980559A true CN106980559A (en) | 2017-07-25 |
| CN106980559B CN106980559B (en) | 2020-08-14 |
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| CN201310491804.1A Active CN103577289B (en) | 2013-10-18 | 2013-10-18 | HDMI (high-definition multimedia interface)-based hot plug detection circuit and multimedia data transmission system using same |
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| US11763773B2 (en) | 2021-06-15 | 2023-09-19 | Asustek Computer Inc. | Computer device and multi-computer system |
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| CN106980559B (en) * | 2013-10-18 | 2020-08-14 | 歌尔科技有限公司 | HDMI (high-definition multimedia interface) -based hot plug detection circuit and multimedia data transmission system |
| CN106155179A (en) * | 2015-04-23 | 2016-11-23 | 鸿富锦精密工业(武汉)有限公司 | Noise signal filtering circuit |
| CN104994320B (en) * | 2015-06-12 | 2018-05-15 | 青岛海信电器股份有限公司 | A kind of HDMI service equipments |
| CN105279055B (en) * | 2015-10-20 | 2019-01-29 | 昆山龙腾光电有限公司 | A kind of hot plug detection adjusting circuit |
| CN108777773B (en) * | 2018-06-21 | 2022-03-01 | 深圳Tcl新技术有限公司 | Serial port debugging circuit based on HDMI socket and television |
| CN109546504A (en) * | 2018-12-20 | 2019-03-29 | 潍坊歌尔电子有限公司 | Connecting line, equipment to be powered, electronic equipment and method of supplying power to |
| CN111818287A (en) * | 2020-07-03 | 2020-10-23 | 深圳市炬力北方微电子有限公司 | Wireless video and audio transmitter and wireless video and audio transmission method |
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| CN203573307U (en) * | 2013-10-18 | 2014-04-30 | 青岛歌尔声学科技有限公司 | Hot plug detection circuit based on HDMI and multimedia data transmission system |
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| US20090177818A1 (en) * | 2008-01-04 | 2009-07-09 | Daeyun Shim | Discovery of electronic devices utilizing a control bus |
| CN103259999A (en) * | 2012-02-20 | 2013-08-21 | 联发科技（新加坡）私人有限公司 | Hot plug detection (HPD) signal output control method and high definition multimedia interface (HDMI) receiving end device and system |
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| CN103577289A (en) | 2014-02-12 |
| CN103577289B (en) | 2017-04-19 |
| CN106980559B (en) | 2020-08-14 |
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