CN114666415B - Data transmission method, display device and control device - Google Patents
Data transmission method, display device and control device Download PDFInfo
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- CN114666415B CN114666415B CN202210526106.XA CN202210526106A CN114666415B CN 114666415 B CN114666415 B CN 114666415B CN 202210526106 A CN202210526106 A CN 202210526106A CN 114666415 B CN114666415 B CN 114666415B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/03—Protocol definition or specification
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/26—Special purpose or proprietary protocols or architectures
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/015—High-definition television systems
Abstract
The invention discloses a data transmission method, display equipment and control equipment, wherein the method is applied to a high-definition multimedia interface (HDMI) receiving device in the display equipment and comprises the following steps: the method comprises the steps that a user-defined data packet transmitted by an HDMI transmitting device of the control equipment is received based on a target communication protocol, the target communication protocol is a communication protocol used for transmitting user-defined data beyond the specification of the HDMI protocol, and the HDMI receiving device is connected with the HDMI transmitting device based on an HDMI connecting line; and decoding the custom data packet based on the target communication protocol to obtain custom data in the custom data packet. The method can conveniently transmit the user-defined data between the display equipment and the control equipment on the basis of not additionally increasing hardware.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a data transmission method, display equipment and control equipment.
Background
In the existing High-Definition Multimedia Interface (HDMI) protocol, a Source/Sink (i.e., some ways of information interaction between a Data transmitting device and a Data receiving device) are defined, for example, interaction of Extended Display Identification Data (EDID) information, interaction of High-Bandwidth Digital Content Protection technology (HDCP) authentication information, interaction of Status and Control Data (SCDC) information, interaction of CEC information through a Consumer Electronics Control (CEC) Channel, and information transmission of information/Control information through a Minimized transmission Differential Signaling(s) Channel may be performed between the two devices through a Display Data Channel (DDC) in HDMI.
However, the above information interaction methods are only for the content specified in the HDMI protocol, and the above methods are not suitable for the content outside the protocol specification, for example, the user-defined content, so that when some user-defined content needs to be transmitted between the display device and the control device connected based on the HDMI connection line, an additional channel for information interaction is often needed for the two devices, which is not convenient enough and has a high hardware cost.
Disclosure of Invention
Therefore, the invention provides a data transmission method to solve the problems of inconvenience and high hardware cost possibly caused by the fact that the control equipment and the display equipment cannot transmit custom data based on an HDMI connecting line in the prior art.
In order to achieve the above object, a first aspect of the present invention provides a data transmission method applied to an HDMI receiving apparatus in a display device, the method including:
the method comprises the steps that a custom data packet transmitted by an HDMI transmitting device of the control equipment based on a target communication protocol is received, wherein the target communication protocol is a communication protocol used for transmitting custom data beyond the specification of the HDMI protocol, and the HDMI receiving device is connected with the HDMI transmitting device based on an HDMI connecting line;
and decoding the user-defined data packet based on the target communication protocol to obtain user-defined data in the user-defined data packet.
Optionally, the HDMI connection line includes sub-connection lines for transmitting differential signals;
the receiving control equipment HDMI transmitting device is based on the user-defined data packet of target communication protocol transmission, including:
and receiving the custom data packet through the sub-connecting line for transmitting the differential signal.
Optionally, the target communication protocol is obtained by self-defining a packet rule of a data portion in a preset type data packet;
the preset type data packet is a data packet in an HDMI protocol, wherein the corresponding use frequency of the data packet is lower than a preset threshold value.
Optionally, before the step of decoding the custom data packet based on the target communication protocol, the method further includes:
decoding the packet header of the data packet from the sub-connecting line for transmitting the differential signal to obtain the target packet type of the data packet;
and under the condition that the type of the target packet is consistent with that of the preset type data packet, determining that the data packet is a self-defined data packet.
Optionally, the preset type data packet includes at least one of the following: an ACP data packet in the HDMI protocol, an ISRC1 data packet in the HDMI protocol, an ISRC2 data packet in the HDMI protocol, and a Gamut Metadata data packet in the HDMI protocol.
Optionally, the custom data includes custom control information, and the custom control information is used for triggering the display device to execute a preset operation;
wherein the preset operation includes an operation for adjusting a display attribute of the display device.
Optionally, after obtaining the custom data, the method further comprises:
and writing the custom data into a storage component of the display device.
In order to achieve the above object, a second aspect of the present invention also provides another data transmission method applied to an HDMI transmitting apparatus in a control device, the method including:
acquiring custom data to be sent;
coding the custom data based on a target communication protocol to obtain a custom data packet, wherein the target communication protocol is a communication protocol for transmitting custom data beyond the specification of the HDMI protocol;
sending the custom data packet to an HDMI receiving device of display equipment to trigger the HDMI receiving device to obtain the custom data by decoding the custom data packet;
wherein, the HDMI transmitting device and the HDMI receiving device are connected based on an HDMI connecting line.
In order to achieve the above object, a third aspect of the present invention also provides an HDMI receiving apparatus applied to a display device, the apparatus comprising:
the receiving module is used for receiving a custom data packet transmitted by an HDMI transmitting device of the control equipment based on a target communication protocol, wherein the target communication protocol is a communication protocol used for transmitting custom data beyond the specification of the HDMI protocol, and the HDMI receiving device is connected with the HDMI transmitting device based on an HDMI connecting line;
and the response module is used for decoding the custom data packet based on the target communication protocol to obtain custom data in the custom data packet.
In order to achieve the above object, a fourth aspect of the present invention also provides an HDMI transmitting apparatus applied to a control device, the apparatus comprising:
the acquisition module is used for acquiring custom data to be sent;
the encoding module is used for encoding the custom data based on a target communication protocol to obtain a custom data packet, wherein the target communication protocol is a communication protocol used for transmitting the custom data beyond the specification of the HDMI protocol;
the sending module is used for sending the custom data packet to an HDMI receiving device of display equipment so as to trigger the HDMI receiving device to obtain the custom data by decoding the custom data packet; wherein, the HDMI transmitting device and the HDMI receiving device are connected based on an HDMI connecting line.
In order to achieve the above object, a fifth aspect of the present invention also provides a display device comprising: an HDMI reception device;
the HDMI receiving apparatus is configured to perform the data transmission method according to any one of the first aspect of the present invention.
In order to achieve the above object, a sixth aspect of the present invention also provides a control apparatus comprising: an HDMI transmission device;
the HDMI transmitting apparatus is configured to execute the data transmission method according to the second aspect of the present invention.
To achieve the above object, the seventh aspect of the present invention further provides a computer readable medium, on which a computer program is stored, which when executed by a processor, implements the method of any one of the first or second aspects of the embodiments of the present invention.
The invention has the following advantages: according to the embodiment of the invention, hardware for information interaction does not need to be additionally arranged in the HDMI transmitting device and the HDMI receiving device, but the HDMI receiving device in the display equipment receives the custom data packet transmitted by the HDMI transmitting device of the control equipment based on the target communication protocol, wherein the target communication protocol can be a communication protocol for transmitting custom data beyond the specification of the HDMI protocol, and the custom data packet is decoded, so that the custom data transmitted by the HDMI transmitting device can be conveniently obtained on the basis of no additional hardware.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
Fig. 1 is a schematic flowchart of a data transmission method according to an embodiment of the present invention.
Fig. 2 is a schematic flowchart of determining a custom data packet according to an embodiment of the present invention.
Fig. 3 is a schematic flowchart of another data transmission method according to an embodiment of the present invention.
Fig. 4 is a schematic flow chart of data transmission processing according to an embodiment of the present invention.
Fig. 5 is a block diagram of an HDMI sink device according to an embodiment of the present invention.
Fig. 6 is a block diagram of an HDMI transmitter according to an embodiment of the present invention.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order; furthermore, the embodiments and features of the embodiments of the present invention may be arbitrarily combined with each other without conflict.
As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
When the terms "comprises" and/or "comprising … …" are used in this specification, the presence of stated features, integers, steps, operations, elements, and/or components are specified, but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present invention and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The embodiment of the invention provides a data transmission method, aiming at the problems of inconvenience and high hardware cost caused by the fact that hardware needs to be additionally added to display equipment and control equipment which are connected based on an HDMI (high-definition multimedia interface) connecting line to provide a channel for user-defined data interaction when user-defined content of some users needs to be transmitted between the two pieces of equipment in the related art. Please refer to fig. 1, which is a flowchart illustrating a data transmission method according to an embodiment of the present invention, where the method can be applied to an HDMI receiving apparatus in a display device.
As shown in fig. 1, the data transmission method provided by the embodiment of the present invention may include the following steps S101 to S102, which are described in detail below.
Step S101, receiving a custom data packet transmitted by an HDMI transmitting device of the control equipment based on a target communication protocol, wherein the target communication protocol is a communication protocol used for transmitting custom data beyond the specification of the HDMI protocol, and the HDMI receiving device is connected with the HDMI transmitting device based on an HDMI connecting line.
The custom data outside the specification of the HDMI protocol may be any type of data to be transmitted by the user, for example, may be custom control information, where the custom control information is used to trigger the display device to perform a preset operation, and the preset operation may be, for example, an operation for adjusting a display attribute of the display device, where the display attribute may be, for example, a resolution, a display mode, or the like.
In the embodiment of the invention, the HDMI connecting line comprises a sub connecting line for transmitting differential signals; the receiving control equipment HDMI transmitting device is based on the user-defined data packet of target communication protocol transmission, including: and receiving the custom data packet through the sub-connecting line for transmitting the differential signal.
In the embodiment of the invention, the target communication protocol can be obtained by self-defining the packet rule of the data part in the preset type data packet; the preset type data packet may be a data packet in the HDMI protocol, where the corresponding use frequency is lower than a preset threshold.
In the related art, when the HDMI transmitting apparatus and the HDMI receiving apparatus connected based on the HDMI connection line are performing information exchange, control information/Infoframe information may be generally transmitted according to Transition Minimized Differential Signaling (TMDS) data defined in the HDMI protocol. In such an information transmission method, information is generally transmitted through the sub-connection lines for transmitting differential signals in the HDMI connection line, wherein the sub-connection lines can be divided into four groups, three of the four groups are sub-connection lines for transmitting TMDS data based on differential signals, and the other group is a sub-connection line for transmitting clock signals based on differential signals, and video (video) data, audio (audio) data, control data packets (crtl packets), and auxiliary data packets (Infoframe packets) can be currently transmitted through the four groups of sub-connection lines.
Existing HDMI protocols typically define a large number of types of packets. For example, as shown in table 1 below, in version 1.4 of the HDMI protocol, it supports 17 types of packets.
Table 1, schematic table of packet types supported by version 1.4 of HDMI protocol:
as shown in the above schematic table of the type of packets supported by version 1.4 of the HDMI protocol, the supported packets are respectively composed of a header (head) of 3 bytes and a data section (data) of 28 bytes, and based on the plurality of types of packets, the user can transmit prescribed TMDS data between the control device and the display device based on the HDMI protocol.
However, currently, when TMDS data transmission is performed based on the HDMI protocol, although the HDMI protocol supports multiple types of data packets, many data packets are rarely used, for this reason, in the embodiment of the present invention, in order to fully utilize each type of data packet supported in the HDMI protocol, a target communication protocol is obtained by redefining a packet rule of a data portion in a data packet whose usage frequency is lower than a preset threshold in the data packet supported by the HDMI protocol, so that user-defined data of a user can be conveniently transmitted directly based on the target communication protocol without additionally adding any hardware for information interaction to the HDMI transmitting apparatus and the HDMI receiving apparatus, where the preset threshold may be set according to a specific implementation condition, and is not particularly limited herein.
In some embodiments, the preset type of data packet may include at least one of: ACP data packets in the HDMI protocol, ISRC1 data packets in the HDMI protocol, ISRC2 data packets in the HDMI protocol, and Gamut Metadata data packets in the HDMI protocol.
In addition, in the embodiment of the present invention, when the HDMI transmitting apparatus of the control device transmits data to the HDMI receiving apparatus of the display device connected via the HDMI connection line, the HDMI transmitting apparatus of the control device may specifically transmit the custom data based on the following procedure: acquiring custom data to be sent; coding the custom data based on a target communication protocol to obtain a custom data packet; and sending the custom data packet to an HDMI receiving device of the display equipment to trigger the HDMI receiving device to obtain the custom data by decoding the custom data packet.
Considering that the packet sent by the HDMI sending apparatus to the HDMI receiving apparatus may still include a packet normally specified by the HDMI protocol, before implementing step S101, in order to avoid an erroneous parsing process, after the HDMI receiving apparatus receives the packet sent by the HDMI sending apparatus, the packet may be checked to determine whether the packet is a custom packet generated based on the target communication protocol, and how the HDMI receiving apparatus determines the custom packet will be described below.
As shown in fig. 2, in the embodiment of the present invention, the HDMI sink device may determine whether the packet is a custom packet based on the following steps: step S201, decoding the packet header of the data packet from the sub-connecting line for transmitting the differential signal to obtain the target packet type of the data packet; step S202, under the condition that the type of the target packet is consistent with that of the preset type data packet, the data packet is determined to be a user-defined data packet.
For example, in the case where the preset-type packet is a packet of which the packet type is "0 x 06" as shown in table 1, the HDMI sink device may determine that the packet is a custom packet in the case where the target packet type in the header of the received packet is "0 x 06", and perform the present step S101; on the other hand, if the type of the target packet in the header of the received packet is not "0 x 06", which indicates that the packet is not a custom packet, the HDMI sink device may decode the packet based on the normal HDMI protocol instead of the target communication protocol provided in the embodiment of the present invention. Of course, this is merely an example, in some embodiments, in a case that there are a plurality of preset type packets, the HDMI sink device may also check whether the received packet is a custom packet by checking whether a target packet type obtained by decoding is any one of the plurality of preset type packets, which is not limited herein.
After the HDMI sink device determines that the received packet is a custom packet, step S102 can be executed.
And S102, decoding the custom data packet based on the target communication protocol to obtain the custom data in the custom data packet.
Under the condition that the HDMI receiving device determines that the received data packet is the custom data packet, the custom data packet can be analyzed and processed based on the target communication protocol to obtain custom data in the custom data packet.
In some embodiments, the HDMI receiving apparatus may write the custom data directly into a storage component of the display device after receiving the custom data.
In addition, in some embodiments, in the case that the customization data is the customization control information, the display device may perform a preset operation based on the customization control information in the case that the customization control information is obtained by monitoring. For example, the operation of adjusting the display attribute is performed, and is not limited herein.
In addition, in the embodiment of the present invention, another data transmission method is also provided, which can be applied to an HDMI sending apparatus in a control device, please refer to fig. 3, which is a flowchart illustrating another data transmission method provided in the embodiment of the present invention. As shown in fig. 3, the data transmission method includes the following steps S301 to S303:
step S301, obtaining custom data to be sent.
Step S302, the custom data is coded based on a target communication protocol to obtain a custom data packet, wherein the target communication protocol is a communication protocol used for transmitting the custom data outside the specification of the HDMI protocol.
Step S303, sending the custom data packet to an HDMI receiving device of the display equipment to trigger the HDMI receiving device to obtain custom data by decoding the custom data packet; the HDMI transmitting device and the HDMI receiving device are connected based on an HDMI connecting line.
In summary, based on the data transmission method provided in the embodiments of the present invention, it is not necessary to additionally add hardware for information interaction in the HDMI transmitting device and the HDMI receiving device, but the HDMI receiving device in the display device receives a custom data packet transmitted by the HDMI transmitting device of the control device based on a target communication protocol, where the target communication protocol may be a communication protocol for transmitting custom data outside the specification of the HDMI protocol, and the custom data packet is decoded, so that the custom data transmitted by the HDMI transmitting device can be conveniently obtained without additionally adding hardware.
For convenience of understanding, the data transmission method according to the embodiment of the present invention is described below with reference to fig. 4, where in fig. 4, an HDMI transmitting apparatus is applied to a control device, an HDMI receiving apparatus is applied to a display device, and a destination communication protocol is exemplified by a communication protocol that redefines a packet packing rule of a data portion of a packet having a packet type of "0 x 06" in the HDMI protocol so as to support at least transmission resolution information.
As shown in fig. 4, in a case where the user desires to directly adjust the resolution of the display device through the control device for saving operation, it may transmit resolution information "1920 × 1080" as custom data to the HDMI transmitting apparatus through the control device, and the HDMI transmitting apparatus acquires the resolution information as custom data by performing step S401; then, step S402 is executed to generate a packet type "0 x 06" in the packet header based on the target communication protocol, and the data portion includes the custom data packet of the resolution information; after that, step S403 is performed to transmit the custom packet to the HDMI sink of the display apparatus.
After the HDMI receiving apparatus of the display device receives the custom data packet, step S404 may be executed first, and the packet header of the custom data packet is decoded to obtain the packet type of the custom data packet; and executing step S405 to determine whether the packet type is "0 x 06"; if yes, step S406 is executed to decode the custom packet based on the target communication protocol, and obtain resolution information "1920 × 1080" in the data portion; after obtaining the resolution information, it may perform step S407 of writing the resolution information into a storage component of the display device.
And the display device may adjust its screen resolution to "1920 × 1080" in the case of listening to the writing of the resolution information in its storage component.
It should be noted that, the steps of the above methods are divided for clarity, and the implementation may be combined into one step or split some steps, and the steps are divided into multiple steps, so long as the steps include the same logical relationship, which is within the protection scope of the present patent; it is within the scope of this patent to add insignificant modifications or introduce insignificant designs to the algorithms or processes, but not to change the core designs of the algorithms and processes.
An embodiment of the present invention further provides an HDMI receiving apparatus, which may be applied to a display device, and as shown in fig. 5, the HDMI receiving apparatus 500 may include: a receiving module 501 and a responding module 502.
The receiving module 501 is configured to receive a custom data packet transmitted by an HDMI transmitting device of a control device based on a target communication protocol, where the target communication protocol is a communication protocol used for transmitting custom data outside the specification of the HDMI protocol, and the HDMI receiving device is connected to the HDMI transmitting device based on an HDMI connection line.
The response module 502 is configured to decode the custom data packet based on the target communication protocol to obtain custom data in the custom data packet.
In some embodiments, the HDMI connection line includes sub-connection lines for transmitting differential signals, and the receiving module 501, when receiving the custom packet transmitted by the HDMI transmitting apparatus of the control device based on the target communication protocol, may be configured to: and receiving the custom data packet through the sub-connecting line for transmitting the differential signal.
In some embodiments, the HDMI receiving apparatus 500 may further include a packet determining module configured to: decoding the packet header of the data packet from the sub-connecting line for transmitting the differential signal to obtain the target packet type of the data packet; and under the condition that the type of the target packet is consistent with that of the preset type data packet, determining that the data packet is a self-defined data packet.
In some embodiments, the HDMI receiving apparatus 500 may further comprise a storage processing module configured to: after obtaining the custom data, writing the custom data into a storage component of a display device.
The functions or modules included in the HDMI receiving apparatus provided in the embodiment of the present invention may be used to execute the method described in the embodiment of the first aspect of the present invention, and for concrete implementation and technical effects, reference may be made to the description of the embodiment of the method above, and for brevity, details are not described here again.
An embodiment of the present invention further provides an HDMI transmitting apparatus, which may be applied to a control device, and as shown in fig. 6, the HDMI transmitting apparatus 600 may include: an obtaining module 601, an encoding module 602, and a sending module 603.
The obtaining module 601 is configured to obtain custom data to be sent.
The encoding module 602 is configured to perform encoding processing on the custom data based on a target communication protocol to obtain a custom data packet, where the target communication protocol is a communication protocol used for transmitting custom data outside the specification of the HDMI protocol.
The sending module 603 is configured to send the custom data packet to an HDMI receiving apparatus of a display device, so as to trigger the HDMI receiving apparatus to obtain the custom data by decoding the custom data packet; wherein, the HDMI transmitting device and the HDMI receiving device are connected based on an HDMI connecting line.
The functions or modules included in the HDMI transmitting apparatus provided in the embodiment of the present invention may be used to execute the method described in the second aspect of the method embodiment, and for concrete implementation and technical effects, reference may be made to the description of the method embodiment above, and for brevity, details are not described here again.
Each module in the present embodiment is a logical module, and in practical applications, one logical unit may be one physical unit, may be a part of one physical unit, or may be implemented by a combination of a plurality of physical units. In addition, in order to highlight the innovative part of the present invention, elements that are not so closely related to solving the technical problems proposed by the present invention are not introduced in the present embodiment, but this does not indicate that other elements are not present in the present embodiment.
An embodiment of the present invention further provides a display device, which includes an HDMI receiving apparatus, configured to execute the data transmission method according to any one of the first aspect of the embodiments of the present invention, where the HDMI receiving apparatus may be, for example, the HDMI receiving apparatus 500 described above.
Embodiments of the present invention also provide a control device, including an HDMI transmitting apparatus for executing the data transmission method according to the second aspect of the embodiments of the present invention, where the HDMI transmitting apparatus may be, for example, the HDMI transmitting apparatus 600 described above.
The present embodiment also provides a computer readable medium having stored thereon a computer program which, when executed by a processor, implements the method of any of the above embodiments.
It will be understood by those of ordinary skill in the art that all or some of the steps of the above inventive method, systems, functional modules/units in the apparatus may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed by several physical components in cooperation. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Those skilled in the art will appreciate that although some embodiments described herein include some features included in other embodiments instead of others, combinations of features of different embodiments are meant to be within the scope of the embodiments and form different embodiments.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (8)
1. A data transmission method is applied to a high-definition multimedia interface (HDMI) receiving device in a display device, and the method comprises the following steps:
the method comprises the steps that a custom data packet transmitted by an HDMI transmitting device of the control equipment based on a target communication protocol is received, wherein the target communication protocol is a communication protocol used for transmitting custom data beyond the specification of the HDMI protocol, and the HDMI receiving device is connected with the HDMI transmitting device based on an HDMI connecting line;
decoding the custom data packet based on the target communication protocol to obtain custom data in the custom data packet;
the target communication protocol is obtained by self-defining a packet rule of a data part in a preset type data packet, wherein the preset type data packet is a data packet of which the corresponding use frequency is lower than a preset threshold value in an HDMI protocol;
the preset type data packet comprises at least one of the following items: ACP data packets in the HDMI protocol, ISRC1 data packets in the HDMI protocol, ISRC2 data packets in the HDMI protocol, and Gamut Metadata data packets in the HDMI protocol.
2. The method according to claim 1, wherein the HDMI connection line comprises sub-connection lines for transmitting differential signals;
the receiving control equipment is characterized in that the HDMI sending device transmits a custom data packet based on a target communication protocol, and the receiving control equipment comprises:
and receiving the custom data packet through the sub-connecting line for transmitting the differential signal.
3. The method of claim 2, wherein before the decoding the custom packet based on the target communication protocol, the method further comprises:
decoding the packet header of the data packet from the sub-connecting line for transmitting the differential signal to obtain the target packet type of the data packet;
and under the condition that the type of the target packet is consistent with that of the preset type data packet, determining that the data packet is a self-defined data packet.
4. The method of claim 1, wherein the customization data includes customization control information, and the customization control information is used for triggering the display device to execute a preset operation;
wherein the preset operation includes an operation for adjusting a display attribute of the display device.
5. The method of claim 1, wherein after obtaining the custom data, the method further comprises:
and writing the custom data into a storage component of the display equipment.
6. A data transmission method applied to an HDMI transmitting apparatus in a control device, the method comprising:
acquiring custom data to be sent;
coding the custom data based on a target communication protocol to obtain a custom data packet, wherein the target communication protocol is a communication protocol for transmitting custom data beyond the specification of the HDMI protocol;
sending the custom data packet to an HDMI receiving device of display equipment to trigger the HDMI receiving device to obtain the custom data by decoding the custom data packet;
the HDMI transmitting device and the HDMI receiving device are connected based on an HDMI connecting line; the target communication protocol is obtained by self-defining a packet rule of a data part in a preset type data packet, wherein the preset type data packet is a data packet of which the corresponding use frequency is lower than a preset threshold value in an HDMI protocol;
the preset type data packet comprises at least one of the following items: an ACP data packet in the HDMI protocol, an ISRC1 data packet in the HDMI protocol, an ISRC2 data packet in the HDMI protocol, and a Gamut Metadata data packet in the HDMI protocol.
7. A display device, comprising: an HDMI reception device;
the HDMI sink device is configured to perform the data transmission method according to any one of claims 1 to 5.
8. A control apparatus, characterized by comprising: an HDMI transmission device;
the HDMI transmitting apparatus is configured to execute the data transmission method according to claim 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210526106.XA CN114666415B (en) | 2022-05-16 | 2022-05-16 | Data transmission method, display device and control device |
Applications Claiming Priority (1)
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