CN113163192B - HDMI interface testing device and system - Google Patents
HDMI interface testing device and system Download PDFInfo
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- CN113163192B CN113163192B CN202010076442.XA CN202010076442A CN113163192B CN 113163192 B CN113163192 B CN 113163192B CN 202010076442 A CN202010076442 A CN 202010076442A CN 113163192 B CN113163192 B CN 113163192B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
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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
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Abstract
The application belongs to the technical field of testing, and mainly provides a testing device and a testing system for an HDMI interface. The testing device controls the starting or closing of the ARC function of the HDMI through the main control module connected with the testing signal source, and the signal separation module respectively connected with the audio/video signal source, the HDMI and the main control module is arranged, so that an initial audio/video signal is sent to the HDMI, and an ARC audio signal to be tested generated by a mainboard to be tested according to the initial audio/video signal when the ARC function of the HDMI is started is sent to the main control module, so that the main control module can test the ARC function of the HDMI according to the ARC audio signal to be tested; moreover, the main control module can realize the test of the HDMI channel of the HDMI according to the HDMI audio/video signal to be tested generated by the mainboard to be tested when the ARC function of the HDMI is closed; and then under the condition of not carrying out the secondary plug of HDMI line, realized the test of HDMI interface ARC function and the test of HDMI passageway simultaneously, improved the efficiency of testing of HDMI interface.
Description
Technical Field
The application belongs to the technical field of testing, and particularly relates to a testing device and a testing system of an HDMI interface.
Background
An Audio Return Channel (ARC) function of a High Definition Multimedia Interface (HDMI) is a newly added function in an HDMI1.4 version specification, and an electronic device and an Audio playing device are connected through an HDMI cable, so that sound of the electronic device is transmitted back to the Audio playing device through an HEAC (usability LINE) Channel of an HDM, a coaxial cable or an optical fiber cable for transmitting Audio between the electronic device and the Audio playing device is omitted, and the High Definition Multimedia Interface (HDMI) is widely applied.
However, currently, in the process of testing the ARC function and the HDMI channel of the HDMI interface, the HDMI signal line needs to be plugged in and pulled out to complete the testing of the ARC function and the HDMI channel of the HDMI interface, which causes a problem of low testing efficiency of the HDMI interface.
Disclosure of Invention
The application provides a testing arrangement and test system of HDMI interface, can improve the efficiency of software testing of HDMI interface.
In a first aspect of the embodiments of the present application, a device for testing an HDMI interface is provided, where the HDMI interface is disposed on a motherboard to be tested; when the testing device tests the HDMI, the testing device is respectively connected with a testing signal source, an audio/video signal source and the HDMI; the test device includes:
the main control module is connected with the test signal source and used for receiving the test signal provided by the test signal source and controlling the on or off of the ARC function of the HDMI according to the test signal;
the signal separation module is respectively connected with the audio and video signal source, the HDMI interface and the main control module, and is used for receiving an initial audio and video signal provided by the audio and video signal source and sending the initial audio and video signal to the HDMI interface;
the signal separation module is further configured to receive an ARC audio signal to be tested, which is returned by the HDMI interface, and send the ARC audio signal to be tested to the main control module; when the ARC audio signal to be tested is the ARC function of the HDMI, the mainboard to be tested generates a return audio signal according to the initial audio and video signal;
the master control module is also used for generating an ARC test result of the HDMI according to the ARC audio signal to be tested;
the master control module is also used for receiving the HDMI audio and video signals to be tested sent by the mainboard to be tested and generating an HDMI channel test result of the HDMI interface according to the HDMI audio and video signals to be tested; when the ARC function of the HDMI interface is turned off, the to-be-tested mainboard generates an HDMI audio/video signal according to the initial audio/video signal.
In some embodiments of the present application, the signal separation module is connected to the audio/video signal source through a first HDMI line; the signal separation module is also connected with the HDMI through a second HDMI line.
In some embodiments of the present application, the generating an ARC test result of the HDMI interface according to the ARC audio signal to be tested includes: and carrying out audio decoding processing on the ARC audio signal to be tested to obtain a first decoded audio signal, comparing the first decoded audio signal with a first reference audio signal to obtain a comparison result, and generating an ARC test result of the HDMI according to the comparison result.
In some embodiments of the present application, the generating an HDMI channel test result of the HDMI interface according to the to-be-tested HDMI audio/video signal includes: decoding the audio signal in the HDMI audio/video signal to be tested to obtain a second decoded audio signal, and comparing the second decoded audio signal with a second reference audio signal to obtain an audio comparison result; decoding the video signal in the HDMI audio/video signal to be tested to obtain a decoded video signal, and comparing the decoded video signal with a reference video signal to obtain a video comparison result; and generating an HDMI channel test result of the HDMI interface according to the audio comparison result and the video comparison result.
In some embodiments of the present application, the receiving a test signal provided by the test signal source and controlling the on of the ARC function of the HDMI interface according to the test signal includes: receiving an ARC test signal provided by the test signal source, and sending an ARC function starting instruction to the mainboard to be tested according to the ARC test signal; and the ARC function starting instruction is used for controlling the starting of the ARC function of the HDMI.
In some embodiments of the present application, the receiving a test signal provided by the test signal source and controlling the ARC function of the HDMI interface to be turned off according to the test signal includes: receiving an HDMI channel test signal provided by the test signal source, and sending an ARC function closing instruction to the mainboard to be tested according to the HDMI channel test signal; and the ARC function closing instruction is used for controlling the ARC function of the HDMI to be closed.
In some embodiments of the present application, the main board to be tested is provided with an audio output port and a video output port.
In some embodiments of the present application, after the ARC function of the HDMI interface is turned on, an audio output port of the motherboard to be tested is turned off; and after the ARC function of the HDMI is closed, an audio output port of the mainboard to be tested is opened.
In some embodiments of the present application, the receiving an HDMI audio/video signal to be tested includes: and receiving the HDMI audio and video signals to be tested output by the audio output port and the video output port of the mainboard to be tested.
In a second aspect of the embodiments of the present application, there is provided a test system for an HDMI interface, the test system including: the testing device comprises a testing signal source, an audio and video signal source and the HDMI interface; the HDMI is arranged on the mainboard to be tested; when testing the HDMI interface, the testing device is respectively connected with the testing signal source, the audio/video signal source and the HDMI interface.
According to the testing device and the testing system of the HDMI, the main control module connected with the testing signal source is arranged to control the on or off of the ARC function of the HDMI, and the signal separation modules respectively connected with the audio and video signal source, the HDMI and the main control module are arranged; then, the signal separation module is used for sending an initial audio and video signal to the HDMI, and an ARC audio signal to be tested generated by the mainboard to be tested according to the initial audio and video signal when the ARC function of the HDMI is started is sent to the main control module, so that the main control module can test the ARC function of the HDMI according to the ARC audio signal to be tested; moreover, the master control module can realize the test of the HDMI channel of the HDMI according to the HDMI audio/video signal to be tested generated by the mainboard to be tested when the ARC function of the HDMI is closed; and then under the condition of not carrying out the secondary plug of HDMI line, realized the test of HDMI interface ARC function and the test of HDMI passageway simultaneously, improved the efficiency of testing of HDMI interface.
Drawings
Fig. 1 is a schematic diagram illustrating a testing principle of a conventional HDMI interface according to an embodiment of the present application;
fig. 2 is a schematic diagram illustrating a testing principle of a testing apparatus for an HDMI interface according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a test system of an HDMI interface according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
In order to explain the technical means of the present application described above, the following description will be given by way of specific examples.
At present, in the testing process of the ARC function of the HDMI interface, the returned audio to be tested is usually sent to the audio playing device through the HDMI cable to play the audio, so as to determine whether the ARC function of the HDMI interface is normal, however, in this testing manner, it is necessary to manually determine whether the audio played by the audio playing device is normal, and when the production line has a large sound, the audio cannot be accurately determined. In addition, in this test mode, since the returned audio to be tested needs to be sent to the audio playing device through the HDMI cable, the HDMI cable needs to be connected to the audio playing device, but cannot be connected to the audio/video signal source, so that when the ARC function of the HDMI interface is tested, the HDMI cable needs to be connected to the audio/video signal source again, and the test of the HDMI channel of the HDMI interface can be implemented.
For example, as shown in fig. 1, in the testing process of the ARC function of the HDMI interface, the returned audio to be tested needs to be sent to an audio playing device through an HDMI cable (shown by a solid line in fig. 1) to play the audio, so as to determine whether the ARC function of the HDMI interface is normal, and then the HDMI cable is plugged into an audio/video signal source (shown by a dotted line in fig. 1) to test the HDMI channel of the HDMI interface, that is, the HDMI cable needs to be plugged and unplugged twice, so that the testing efficiency of the HDMI interface is low.
Based on this, this application embodiment provides a testing arrangement and test system of HDMI interface, need not to carry out the secondary plug of HDMI line, can effectively improve the efficiency of software testing of HDMI interface.
As shown in fig. 2, which is a schematic diagram illustrating a testing principle of the testing apparatus 20 for an HDMI interface provided in the embodiment of the present application, the HDMI interface 231 is disposed on the motherboard 23 to be tested and connected to the motherboard to be tested; when testing the HDMI 231 arranged on the motherboard 23 to be tested, the testing device 20 of the HDMI 231 is connected to the testing signal source 21, the audio/video signal source 22, and the HDMI 231, and may include a main control module 201 and a signal separation module 202.
Specifically, the main control module 201 is connected to the test signal source 21, and is configured to receive the test signal provided by the test signal source 21, and control the ARC function of the HDMI interface 231 to be turned on or turned off according to the test signal.
For example, the main control module receives an ARC test signal provided by the test signal source, and sends an ARC function starting instruction to the mainboard to be tested by using a serial port communication protocol according to the ARC test signal, so as to control the ARC function of the HDMI interface to be started; or receiving an HDMI channel test signal provided by the test signal source, and sending an ARC function closing instruction to the mainboard to be tested by using a serial communication protocol according to the HDMI channel test signal so as to control the ARC function of the HDMI interface to be closed. The HDMI interface is an HDMI interface to be tested, and can be integrated on a mainboard (mainboard to be tested) of an electronic device such as a television, a television set-top box, a computer and the like.
The signal separation module 202 is connected to the audio/video signal source 22, the HDMI interface 231, and the main control module 201, and is configured to receive an initial audio/video signal provided by the audio/video signal source and send the initial audio/video signal to the HDMI interface 231.
For example, as shown in fig. 2, the signal separation module 202 may be connected to the audio/video signal source 22 through a first HDMI line, connected to the HDMI interface 231 through a second HDMI line, and connected to the main control module 201 through a cable; and receives an initial audio/video signal provided by the audio/video signal source through the first HDMI line, and transmits the initial audio/video signal to the HDMI interface 231 through the second HDMI line.
The signal separation module 202 is further configured to receive an ARC audio signal to be tested returned by the HDMI interface 231, and send the ARC audio signal to be tested to the main control module; when the ARC audio signal to be tested is the ARC function of the HDMI, the mainboard to be tested generates a return audio signal according to the initial audio and video signal; therefore, the main control module generates an ARC test result of the HDMI according to the ARC audio signal to be tested, and the test of the ARC function of the HDMI is realized.
Specifically, in this application embodiment, when the test signal that the test signal source provided to host system is ARC test signal, show that the test of HDMI interface ARC function need be carried out this moment, host system can send ARC function according to the ARC test signal that the test signal source that receives provided to the mainboard that awaits measuring and open the instruction, control the ARC function of HDMI interface is opened. Moreover, the signal separation module 202 sends the received initial audio/video signal provided by the audio/video signal source 22 to the HDMI interface 231 through the second HDMI cable, so that the initial audio/video signal is processed by the motherboard 23 to be tested, an ARC audio signal to be tested is generated, the ARC audio signal to be tested is directly returned to the signal separation module 202 through the second HDMI cable by using the ARC function of the HDMI interface, and the ARC audio signal to be tested is sent to the main control module by the signal separation module 202, so that the main control module generates the ARC test result of the HDMI interface according to the ARC audio signal to be tested, thereby realizing the test of the ARC function of the HDMI interface.
In this embodiment of the application, the main control module 201 is further configured to receive an HDMI audio/video signal to be tested sent by the motherboard to be tested, and generate an HDMI channel test result of the HDMI interface according to the HDMI audio/video signal to be tested; when the ARC function of the HDMI interface is closed, the mainboard to be tested generates HDMI audio and video signals according to the initial audio and video signals.
Specifically, in this embodiment of the application, after the testing of the ARC function of the HDMI interface is completed, the test signal source may perform the testing of the HDMI channel of the HDMI interface by providing an HDMI channel test signal to the main control module. At this time, the main control module may send an ARC function closing instruction to the main board to be tested according to the received HDMI channel test signal provided by the test signal source, and control the ARC function of the HDMI interface to be closed. And, the signal separation module 202 sends the received initial audio/video signal provided by the audio/video signal source 22 to the HDMI interface 231 through the second HDMI line. After the initial audio/video signal is processed, the main board 23 to be tested generates an HDMI audio/video signal to be tested, and sends the HDMI audio/video signal to be tested to the main control module 201 by using the audio transmission interface and the video transmission interface on the main board 23 to be tested, so that the main control module generates an HDMI channel test result of the HDMI interface according to the HDMI audio/video signal to be tested, thereby realizing the test of the HDMI channel of the HDMI interface.
It should be noted that, in the embodiment of the present application, the main board 23 to be tested is provided with an audio output port and a video output port. After the ARC function of the HDMI is started, an audio output port of the mainboard to be tested is closed; at the moment, the ARC audio signals to be tested can be transmitted back to the signal separation module through the ARC function of the HDMI through the second HDMI line, and the ARC audio signals to be tested are transmitted to the main control module through the signal separation module, so that the ARC function of the HDMI can be tested. After the ARC function of the HDMI interface is closed, the audio output port of the mainboard to be tested is opened, at the moment, the HDMI audio and video signals to be tested can be sent to the main control module through the audio output port and the video output port of the mainboard to be tested respectively through the audio transmission line and the video transmission line, and therefore testing of the HDMI channel of the HDMI interface is completed.
In some embodiments of the present application, the generating, by the main control module, an ARC test result of the HDMI interface according to the ARC audio signal to be tested may specifically include: the master control module carries out audio decoding processing on the ARC audio signal to be tested to obtain a first decoded audio signal, compares the first decoded audio signal with a first reference audio signal to obtain a comparison result, and generates an ARC test result of the HDMI according to the comparison result.
For example, the waveform of the first decoded audio signal is compared with the waveform of the first reference audio signal, and when the waveform of the first decoded audio signal is consistent with the waveform of the first reference audio signal, it is determined that the ARC function of the HDMI interface is normal; and when the waveform of the first decoded audio signal is inconsistent with the waveform of the first reference audio signal, determining that the ARC function of the HDMI interface is abnormal.
In some embodiments of the present application, the main control module generates the HDMI channel test result of the HDMI interface according to the to-be-tested HDMI audio/video signal, and may specifically include: decoding the audio signal in the HDMI audio/video signal to be tested to obtain a second decoded audio signal, and comparing the second decoded audio signal with a second reference audio signal to obtain an audio comparison result; decoding the video signal in the HDMI audio/video signal to be tested to obtain a decoded video signal, and comparing the decoded video signal with a reference video signal to obtain a video comparison result; and generating an HDMI channel test result of the HDMI interface according to the audio comparison result and the video comparison result.
For example, the waveform of the second decoded audio signal may be compared with the waveform of a second reference audio signal, the data of the decoded video signal may be compared with the data of the reference video signal, and when the waveform of the second decoded audio signal coincides with the waveform of the second reference audio signal and the data of the decoded video signal coincides with the data of the reference video signal, it may be determined that the HDMI channel of the HDMI interface is normal; and when the waveform of the second decoded audio signal is inconsistent with the waveform of the second reference audio signal, or when the data of the decoded video signal is inconsistent with the data of the reference video signal, determining that the HDMI channel of the HDMI interface has an abnormality.
As shown in fig. 3, an embodiment of the present application further provides a test system for an HDMI interface, where the test system may include: the test signal source 21, the audio/video signal source 22, and the HDMI interface test apparatus described in the above embodiments. The HDMI is arranged on the mainboard to be tested; when testing the HDMI interface disposed on the motherboard to be tested, the testing device 20 is connected to the testing signal source 21, the audio/video signal source 22, and the HDMI interface.
It should be noted that, for convenience and simplicity of description, the specific working process of the HDMI interface test system described above may refer to the corresponding process of the HDMI interface test device described in fig. 2, and is not described herein again.
According to the testing device and the testing system of the HDMI, the main control module connected with the testing signal source is arranged to control the opening or closing of the ARC function of the HDMI, the signal separation modules connected with the audio and video signal source, the HDMI and the main control module are arranged, then the initial audio and video signals are sent to the HDMI by the signal separation modules, and the ARC audio signals to be tested generated by the mainboard to be tested according to the initial audio and video signals when the ARC function of the HDMI is opened are sent to the main control module, so that the main control module can test the ARC function of the HDMI according to the ARC audio signals to be tested; moreover, the master control module can realize the test of the HDMI channel of the HDMI according to the HDMI audio/video signal to be tested generated by the mainboard to be tested when the ARC function of the HDMI is closed; and then under the condition of not carrying out the secondary plug of HDMI line, realized the test of HDMI interface ARC function and the test of HDMI passageway simultaneously, improved the efficiency of testing of HDMI interface.
In addition, in this application embodiment, through the master control module to await measuring ARC audio signal and the mode that awaits measuring HDMI audio and video signal carries out the analysis, directly generate the test result of HDMI interface ARC function to and the test result of HDMI passageway, do not need the audio frequency of artifical judgement audio playback equipment broadcast to be normal, avoided when producing the line sound great, appear can't to await measuring ARC audio signal and await measuring HDMI audio and video signal and carry out the problem of accurate judgement, further improved the efficiency of software defined media interface's test.
The above-mentioned embodiments are only specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think of the technical scope of the present application, and all the technical solutions can be easily changed or replaced within the technical scope of the present application, and all the technical solutions are covered in the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (5)
1. The HDMI interface is arranged on a mainboard to be tested; the testing arrangement is right when the HDMI interface tests, respectively with test signal source, audio frequency and video signal source with HDMI interface connection, its characterized in that, the testing arrangement includes:
the main control module is connected with the test signal source and used for receiving the test signal provided by the test signal source and controlling the ARC function of the HDMI to be turned on or turned off according to the test signal;
the signal separation module is respectively connected with the audio and video signal source, the HDMI interface and the main control module and is used for receiving an initial audio and video signal provided by the audio and video signal source; the signal separation module is connected with the audio and video signal source through a first HDMI line and is connected with the HDMI through a second HDMI line;
the signal separation module is further used for sending the received initial audio and video signal provided by the audio and video signal source to the HDMI through the second HDMI line, so that the initial audio and video signal is processed by the mainboard to be tested, and an ARC audio signal to be tested is generated;
the signal separation module is also used for receiving the ARC audio signals to be tested, which are returned by the HDMI, and sending the ARC audio signals to be tested to the master control module; when the ARC audio signal to be tested is the ARC function of the HDMI, the mainboard to be tested generates a return audio signal according to the initial audio and video signal;
the master control module is also used for generating an ARC test result of the HDMI according to the ARC audio signal to be tested;
the master control module is also used for receiving the HDMI audio/video signals to be tested sent by the mainboard to be tested and generating an HDMI channel test result of the HDMI interface according to the HDMI audio/video signals to be tested; when the ARC function of the HDMI interface is closed, the to-be-tested mainboard generates an HDMI audio/video signal to be tested after processing the initial audio/video signal;
the generating an ARC test result of the HDMI interface according to the ARC audio signal to be tested includes:
carrying out audio decoding processing on the ARC audio signal to be tested to obtain a first decoded audio signal, comparing the first decoded audio signal with a first reference audio signal to obtain a comparison result, and generating an ARC test result of the HDMI according to the comparison result;
the generating of the HDMI channel test result of the HDMI interface according to the to-be-tested HDMI audio/video signal comprises the following steps:
decoding the audio signal in the HDMI audio/video signal to be tested to obtain a second decoded audio signal, and comparing the second decoded audio signal with a second reference audio signal to obtain an audio comparison result; decoding the video signal in the HDMI audio/video signal to be tested to obtain a decoded video signal, and comparing the decoded video signal with a reference video signal to obtain a video comparison result; generating an HDMI channel test result of the HDMI according to the audio comparison result and the video comparison result;
the receiving the test signal provided by the test signal source and controlling the starting of the ARC function of the HDMI interface according to the test signal includes: receiving an ARC test signal provided by the test signal source, and sending an ARC function starting instruction to the mainboard to be tested according to the ARC test signal; the ARC function starting instruction is used for controlling the starting of an ARC function of the HDMI;
the receiving the test signal provided by the test signal source and controlling the closing of the ARC function of the HDMI interface according to the test signal includes: receiving an HDMI channel test signal provided by the test signal source, and sending an ARC function closing instruction to the mainboard to be tested according to the HDMI channel test signal; and the ARC function closing instruction is used for controlling the ARC function of the HDMI to be closed.
2. The test apparatus of claim 1, wherein the motherboard under test is provided with an audio output port and a video output port.
3. The test apparatus of claim 2,
after the ARC function of the HDMI is started, the audio output port of the mainboard to be tested is closed;
and after the ARC function of the HDMI is closed, an audio output port of the mainboard to be tested is opened.
4. The testing device of claim 3, wherein said receiving an HDMI audio video signal to be tested comprises:
and receiving the HDMI audio and video signals to be tested output by the audio output port and the video output port of the mainboard to be tested.
5. A test system for an HDMI interface, the test system comprising: a test signal source, an audio-visual signal source and a test apparatus according to any one of claims 1 to 4; the HDMI is arranged on the mainboard to be tested; and when the testing device tests the HDMI, the testing device is respectively connected with the testing signal source, the audio and video signal source and the HDMI.
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| CN202121718U (en) * | 2011-06-30 | 2012-01-18 | 苏州冠捷科技有限公司 | HDMI/ARC function detection tool and detection system |
| CN203535957U (en) * | 2013-10-30 | 2014-04-09 | 京东方科技集团股份有限公司 | An apparatus for detecting an audio return function of an HDMI interface |
| US10565153B2 (en) * | 2014-11-18 | 2020-02-18 | Caavo Inc | Auto detection and adaptive configuration of HDMI ports |
| CN205232386U (en) * | 2015-11-16 | 2016-05-11 | Tcl通力电子（惠州）有限公司 | An apparatus for detecting an audio return function of a HDMI interface |
| CN106341686B (en) * | 2016-09-13 | 2018-06-26 | 广州视源电子科技股份有限公司 | ARC test method for electronic device and signal generator for ARC test |
| CN106303518A (en) * | 2016-10-21 | 2017-01-04 | 广州视源电子科技股份有限公司 | Television circuit board line detection system |
| CN106331698A (en) * | 2016-10-21 | 2017-01-11 | 广州视源电子科技股份有限公司 | Television circuit board line detection method and system |
| CN106597170B (en) * | 2016-12-26 | 2019-10-15 | Tcl王牌电器(惠州)有限公司 | The test method and device of ARC function |
| WO2019125920A1 (en) * | 2017-12-21 | 2019-06-27 | Dolby Laboratories Licensing Corporation | Audio device for hdmi |
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