CN111601099B - High-definition multimedia interface cable detection system and detection method thereof - Google Patents
High-definition multimedia interface cable detection system and detection method thereof Download PDFInfo
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- CN111601099B CN111601099B CN201910130320.1A CN201910130320A CN111601099B CN 111601099 B CN111601099 B CN 111601099B CN 201910130320 A CN201910130320 A CN 201910130320A CN 111601099 B CN111601099 B CN 111601099B
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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
- H04N17/004—Diagnosis, testing or measuring for television systems or their details for digital television systems
Abstract
A high-definition multimedia interface cable detection system comprises a source device, a high-definition multimedia interface cable to be detected and a receiving end device, wherein the source device is connected with the receiving end device through the high-definition multimedia interface cable to be detected. The source device first obtains a video resolution list supported by the receiving device, and then sequentially detects from the lowest video resolution to the highest video resolution in the video resolution list. And the source device transmits detection data to the receiving end device according to the detection parameters defined by the user, if the detection success information replied by the receiving end device is received after the detection data is transmitted, the video resolution detected at this time is available, the detected video resolution is further increased by one level, and the next round of detection is carried out until the detection failure information replied by the receiving end device is received or the source device finishes detecting the highest video resolution. The invention also discloses a detection method of the high-definition multimedia interface cable. The invention can effectively obtain the highest display parameter data available for the high-definition multimedia interface cable.
Description
Technical Field
The present invention relates to a detection system, and more particularly, to a high definition multimedia interface cable detection system and a detection method thereof.
Background
The standard of the high-definition multimedia interface is new, and the transmission speed of transmitting and receiving data through the high-definition multimedia interface cable is faster and faster. However, the user often cannot know whether the purchased high-definition multimedia interface cable meets the latest transmission speed standard and needs to purchase a new high-definition multimedia interface cable.
In addition, different manufacturers have different production materials and manufacturing modes, which cause the quality of high-definition multimedia interface cables on the market to be uneven. Because the quality of the high-definition multimedia interface cable cannot be detected, the user can only continue to purchase an expensive new high-definition multimedia interface cable, and the old high-definition multimedia interface cable is abandoned, so that the waste of resources is caused.
Disclosure of Invention
In view of the above, a high-definition multimedia interface cable detection system and a detection method thereof are needed, which enable a user to clearly understand the communication capability of a purchased high-definition multimedia interface cable.
The invention provides a high-definition multimedia interface cable detection system which is characterized by comprising a source device, a detection device and a detection module, wherein the source device is connected with the source device; a high-definition multimedia interface cable; the source device is connected with the source device through the high-definition multimedia interface cable, wherein the source device executes the following steps of acquiring a video resolution list supported by the receiving device by reading the extended display identification data of the receiving device; setting the detected video resolution to be the lowest video resolution according to the video resolution list; transmitting the detection parameters defined by the user to the receiving end device; transmitting detection data to the receiving end device according to the detection parameters; judging whether detection success information replied by the receiving end device is received or not; if the detection success information is received and the detected video resolution does not reach the highest video resolution in the video resolution list, the detected video resolution is increased by one level, and the detection data is continuously transmitted to the receiving end device according to the detection parameters.
The invention also provides a high-definition multimedia interface cable detection method, which is characterized in that the method is used for a source device, the source device is connected with a receiving end device through a high-definition multimedia interface cable, and the method comprises the following steps of acquiring a video resolution list supported by the receiving end device by reading the extended display identification data of the receiving end device; setting the detected video resolution to be the lowest video resolution according to the video resolution list; transmitting the detection parameters defined by the user to the receiving end device; transmitting detection data to the receiving end device according to the detection parameters; judging whether detection success information replied by the receiving end device is received or not; and if the detection success information is received and the detected video resolution does not reach the highest video resolution in the video resolution list, increasing the detected video resolution by one level, and continuously transmitting the detection data to the receiving end device according to the detection parameters.
Compared with the prior art, by using the high-definition multimedia interface cable detection system and the detection method, a user can automatically detect the quality of the high-definition multimedia interface cable by connecting a source device with a receiving end device through the high-definition multimedia interface cable to be detected by the source device.
Drawings
Fig. 1 is a schematic diagram of a high-definition multimedia interface cable detection system according to an embodiment of the invention.
Fig. 2 is a flowchart illustrating a method for performing high-definition multimedia interface cable detection by a source device according to an embodiment of the invention.
Fig. 3 is a flowchart illustrating a method for performing high-definition multimedia interface cable detection by a receiving end device according to an embodiment of the invention.
Description of the main elements
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100 |
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110 |
| Receiving |
120 |
| High-definition |
130 |
Detailed Description
Please refer to fig. 1, which is a diagram illustrating a detection system 100 according to an embodiment of the present invention. The detection system 100 includes the use of high definition multimedia interfacesA source device 110 and a sink device 120 that transmit and receive video, audio and/or control data via an HDMI (High Definition Multimedia Interface), wherein the source device 110 and the sink device 120 are connected via an HDMI cable 130. According to an embodiment of the present invention, the source device 110 is a set-top box or a television box, the sink device 120 is a television, and the HDMI cable 130 is an HDMI cable to be tested. In this embodiment, the HDMI cable 130 includes a Transition Minimized Differential Signaling (TMDS) line for transmitting Data content (including video signals and audio signals), a CEC line for transmitting a Consumer Electronics Control (CEC) command, and a Display Data Channel (DDC) for transmitting Extended Display Identification Data (EDID), i.e., an I of the HDM cable 1302A C bus, an HPD line transmitting a Hot Plug Detect (HPD) signal, and a 5V power line controlling a voltage at 5V with the source device 110 in order to Detect a connection condition.
In one embodiment, the command transmission between the source device 110 and the sink device 120 may be performed by the HDMI Consumer Electronic Control (CEC) standard. The CEC standard commands can be transmitted in two directions, i.e. from the source device 110 to the sink device 120, or from the sink device 120 to the source device 110. The details of the CEC standard are already established in the current HDMI standard, and therefore are not described herein again. In an embodiment, after the source device 110 is connected to the sink device 120 via the HDMI cable 130, a user can control the source device 110 and the sink device 120 via a single remote controller, and the source device 110 and the sink device 120 passively receive an instruction input by the user via the remote controller for performing a related action. In the present embodiment, an instruction that the user requests HDMI cable detection is used as a trigger condition for the source device 110 to start HDMI cable detection. For example, the source device 110 can determine an HDMI cable detection request from a user from a received remote controller signal and use it as a trigger condition for performing the HDMI cable 130 detection.
Please refer to fig. 2, which is a flowchart illustrating a method of the source device 110 performing the HDMI cable 130 detection according to an embodiment of the present invention.
Step S210, via I in the HDMI cable 1302The C bus reads the EDID of the sink device 120 to obtain a list of video resolutions that the sink device 120 can support.
In step S220, the source device 110 sets the detected video resolution to the lowest video resolution that can be supported by the sink device 120 and starts detecting. The source device 110 also transmits text regarding the start of HDMI cable detection via On Screen Display (OSD) control supported by the CEC standard, so as to Display the text On the Screen of the sink device 120. The text may be "to start HDMI cable detection" or any other predetermined content to inform the user that HDMI cable detection is about to be performed. In addition, the source device 110 also transmits detection parameters to the sink device 110 via a Vendor Specific Command (Vendor Specific Command) supported by the CEC standard.
In one embodiment, the source device 110 transmits detection parameters including detection data amount and detection samples (Pattern) to the sink device 120. The detection data volume and the detection sample can be customized by a user. For example, a user may customize the amount of test data to be X megabytes (Mbyte) and customize the test samples to include Y0, Y1, and Y2. In one embodiment, predetermined detection parameters may also be used. For example, the amount of detection data transmitted by the source device 110 is 0 × 0000 megabyte, which indicates that detection is to be performed at a preset X — 1024; the inspection samples Y0, Y1 and Y2 transmitted by the source device 110 are all 0 × 0000, which indicates that the inspection samples A, B and C in table 1 below are inspected, wherein the inspection samples A, B and C are data contents that are easy to detect whether there is mutual interference and transmission error between high-speed signal lines due to the quality relationship of the wire.
[ TABLE 1 ]
When the receiving end device 120 receives the detection parameters, the received detection parameters are used as detection conditions with good protocols for detection.
In step S230, the source device 110 transmits detection data to the sink device 120 according to the agreed detection parameters. In one embodiment, the source device 110 may transmit detection data via a TMDS data channel in the HDMI cable 130.
Step S240, determining whether the receiving device 120 receives the message that the detection is successful.
In an embodiment, the steps S230 and S240 further include the following specific detecting steps:
(1) the source device 110 transmits the detection data of the detection sample Y0 to the sink device 120 for a detection data amount of X megabytes, and the sink device 120 verifies whether the content of the received detection data is incorrect. If the verification is correct, the sink device 120 notifies the source device 110 to continue transmitting the detection data;
(2) the source device 110 transmits the detection data of the detection sample Y1 to the sink device 120 for a detection data amount of X megabytes, and the sink device 120 verifies whether the content of the received detection data is incorrect. If the verification is correct, the sink device 120 notifies the source device 110 to continue transmitting the detection data; and
(3) the source device 110 transmits the detection data of the detection sample Y2 to the sink device 120 for a detection data amount of X megabytes, and the sink device 120 verifies whether the content of the received detection data is incorrect. If the verification is correct, the sink device 120 replies a message indicating that the source device 110 successfully detects the data.
If the sink device 120 verifies that the received detection data is incorrect in any of the above process steps, the sink device 120 replies a message indicating that the source device 110 failed in the detection.
In step S240, if the source device 110 determines that the detection success message replied by the sink device 120 is received, the process continues to step S250; if the source device 110 determines that the detection success message replied by the sink device 120 is not received, the process continues to step S260. In an embodiment, if the source device 110 does not receive the detection success message returned by the sink device 120, the source device 110 may receive the detection failure message returned by the sink device 120.
In step S250, the source device 110 further determines whether the detected video resolution has reached the highest video resolution that the sink device 120 can support. If the source device 110 determines that the detected video resolution has not reached the highest video resolution that can be supported by the sink device 120, then step S270 is performed; if the source device 110 determines that the detected video resolution has reached the highest video resolution that can be supported by the sink device 120, the process continues to step S260.
In step S260, when the source device 110 does not receive the detection success message returned by the sink device 120, or when the source device 110 determines that the detection process has reached the highest video resolution that can be supported by the sink device 120, the source device 110 displays the highest display parameter data available for the HDMI cable 130 on the screen of the sink device 120 through the on-screen display control supported by the CEC standard, so as to facilitate the user to know the detection result of the HDMI cable 130. In one embodiment, the source device 110 displays the highest video resolution that can be supported by the HDMI cable 130 on the screen of the sink device 120 via an on-screen display control supported by the CEC standard. For example, when the source device 110 does not receive the detection success information returned by the sink device 120, in step S260, the video resolution detected in the previous time is displayed or the video resolution detected this time is down-regulated by one level as the highest display parameter data available for the HDMI cable 130; if the detected video resolution is the lowest video resolution, the highest display parameter data that is not available for the HDMI cable 130 is displayed. When the source device 110 has received the detection success message returned by the sink device 120 and the detected video resolution has reached the highest video resolution that the sink device 120 can support, in step S260, the highest video resolution is displayed as the highest display parameter data available for the HDMI cable 130.
In step S270, when the source device 110 determines that the detected video resolution has not reached the highest video resolution that the sink device 120 can support, the detected video resolution is increased by one step, and the detection is started again in step S230.
Please refer to fig. 3, which is a flowchart illustrating steps of a detection method of the sink device 120 corresponding to the source device 110 in fig. 2 according to an embodiment of the present invention.
In step S310, the sink device 120 performs detection on the HDMI cable 130 according to the received detection parameter as a detection parameter in good agreement with the source device 110.
In step S320, the sink device 120 receives the detection data transmitted by the source device 110.
In step S330, the receiving end device 120 verifies whether the received detection data is correct according to the agreed detection parameters. If the received detection data conforms to the agreed detection data amount and detection sample, continuing to perform step S340; otherwise, the process continues to step S350.
In step S340, the receiving device 120 replies with a message that the source device 110 successfully detects.
In step S350, the sink device 120 replies to the source device 110 with a message of failed detection.
To summarize, the source device 110 starts detecting the HDMI cable 130 at the lowest video resolution that can be supported by the sink device 120, and ends the detection of the HDMI cable 130 when there is a problem in the HDMI cable 130, or when high-resolution detection data exceeding the transmission capacity that can be supported by the HDMI cable 130 is transmitted and received, or when all the video resolutions that can be supported by the sink devices have been detected by the detection process, so as to effectively know the highest video resolution that can be supported by the HDMI cable 130. In addition, the detection method provided by the invention can be compatible with the current HDMI standard, and can reduce the resource waste caused by idle HDMI cables or repeated purchase of HDMI cables.
It should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (4)
1. A high definition multimedia interface cable detection system, the system comprising:
a source device;
a high-definition multimedia interface cable; and
a sink device connected to the source device through the high-definition multimedia interface cable, wherein the source device performs the following steps:
acquiring a video resolution list supported by the receiving end device by reading the extended display identification data of the receiving end device;
setting the detected video resolution to be the lowest video resolution according to the video resolution list;
transmitting user-defined detection parameters to the receiving end device, wherein the detection parameters comprise detection data volume and detection samples;
transmitting detection data to the receiving end device via a minimized transmission differential signaling data channel of the high-definition multimedia interface cable according to the detection parameters, wherein the detection data comprises repeating the detection samples by the detection data amount;
judging whether detection success information replied by the receiving end device is received or not;
when the detection success information is judged to be received and the detected video resolution does not reach the highest video resolution in the video resolution list, the detected video resolution is increased by one level, and the detection data is continuously transmitted to the receiving end device according to the detection parameters;
when the detection success information is judged to be received and the detected video resolution reaches the highest video resolution in the video resolution list, displaying the highest display parameter data available for the high-definition multimedia interface cable on a screen of the receiving end device as the highest video resolution through screen display control of a consumer electronics control standard; and
and when the successful detection information is judged not to be received, displaying the highest display parameter data available for the high-definition multimedia interface cable on the screen of the receiving end device by screen display control of a consumer electronics control standard, wherein the highest display parameter data unavailable for the high-definition multimedia interface cable is displayed when the detected video resolution is the lowest video resolution and is reduced by one level from the detected video resolution.
2. The inspection system of claim 1, wherein the inspection parameters are transmitted via vendor specific commands of a consumer electronics control standard.
3. A high-definition multimedia interface cable detection method is used for a source device, the source device is connected with a receiving terminal device through a high-definition multimedia interface cable, and the method comprises the following steps:
acquiring a video resolution list supported by the receiving end device by reading the extended display identification data of the receiving end device;
setting the detected video resolution to be the lowest video resolution according to the video resolution list;
transmitting user-defined detection parameters to the receiving end device, wherein the detection parameters comprise detection data volume and detection samples;
transmitting detection data to the receiving end device via a minimized transmission differential signaling data channel of the high-definition multimedia interface cable according to the detection parameters, wherein the detection data comprises repeating the detection samples by the detection data amount;
judging whether detection success information replied by the receiving end device is received or not; and
when the detection success information is judged to be received and the detected video resolution does not reach the highest video resolution in the video resolution list, the detected video resolution is increased by one level, and the detection data is continuously transmitted to the receiving end device according to the detection parameters;
when the detection success information is judged to be received and the detected video resolution reaches the highest video resolution in the video resolution list, displaying the highest display parameter data available for the high-definition multimedia interface cable on a screen of the receiving end device as the highest video resolution through screen display control of a consumer electronics control standard; and
and when the successful detection information is judged not to be received, displaying the highest display parameter data available for the high-definition multimedia interface cable on the screen of the receiving end device by screen display control of a consumer electronics control standard, wherein the highest display parameter data unavailable for the high-definition multimedia interface cable is displayed when the detected video resolution is the lowest video resolution and is reduced by one level from the detected video resolution.
4. The detection method of claim 3, wherein the detection parameter is transmitted via a vendor specific command of a CEC standard.
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| CN106105248A (en) * | 2014-03-12 | 2016-11-09 | Lg电子株式会社 | For utilizing HDMI to send and receiving the apparatus and method of data |
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| KR100846450B1 (en) * | 2006-08-31 | 2008-07-16 | 삼성전자주식회사 | Method for automatically selecting resolution and video receving apparatus thereof |
| TWI415449B (en) * | 2011-03-10 | 2013-11-11 | Sunplus Technology Co Ltd | Tv system and associated control method |
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| CN103491435A (en) * | 2013-09-10 | 2014-01-01 | 深圳创维数字技术股份有限公司 | Method and device for determining resolution of set-top box |
| CN106105248A (en) * | 2014-03-12 | 2016-11-09 | Lg电子株式会社 | For utilizing HDMI to send and receiving the apparatus and method of data |
| CN107424548A (en) * | 2017-09-25 | 2017-12-01 | 郑州云海信息技术有限公司 | The test system and method for a kind of monitor resolution |
| CN109274962A (en) * | 2018-11-01 | 2019-01-25 | 深圳创维数字技术有限公司 | Output resolution ratio determines method, apparatus, equipment and computer readable storage medium |
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