CN112653924A - HDMI receiving method and device - Google Patents
HDMI receiving method and device Download PDFInfo
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- CN112653924A CN112653924A CN202011483295.4A CN202011483295A CN112653924A CN 112653924 A CN112653924 A CN 112653924A CN 202011483295 A CN202011483295 A CN 202011483295A CN 112653924 A CN112653924 A CN 112653924A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
- H04N21/4363—Adapting the video or multiplex stream to a specific local network, e.g. a IEEE 1394 or Bluetooth® network
- H04N21/43632—Adapting the video or multiplex stream to a specific local network, e.g. a IEEE 1394 or Bluetooth® network involving a wired protocol, e.g. IEEE 1394
- H04N21/43635—HDMI
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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 discloses HDMI receiving method and device is applied to the receiving terminal, and the receiving terminal includes odd number collection module and even number collection module, and the receiving terminal passes through HDMI interface connection transmitting terminal, the method includes: the method comprises the steps of receiving transmission information sent by a sending end, wherein the transmission information comprises a plurality of transmission data, generating a first detection data group by using an odd number acquisition module to acquire transmission data with preset data quantity from the plurality of transmission data, generating a second detection data group by using an even number acquisition module to acquire the transmission data with the preset data quantity from the plurality of transmission data, judging whether the first detection data group and the second detection data group contain a preset standard transmission data group, receiving the data sent by the sending end by using the odd number acquisition module when the first detection data group contains the preset standard data group, and receiving the data sent by the sending end by using the even number acquisition module when the second detection data group contains the preset standard data group.
Description
Technical Field
The present application relates to the field of computer technologies, and in particular, to an HDMI receiving method and apparatus.
Background
The High Definition Multimedia Interface (HDMI [1]) is a fully digital video and audio transmission Interface, which can transmit uncompressed audio and video signals. The HDMI can be used for set-top boxes, DVD players, personal computers, televisions, game hosts, comprehensive amplifiers, digital stereos, televisions and other equipment. HDMI can send audio frequency and video signal simultaneously, because audio frequency and video signal adopt same wire rod, simplifies the installation degree of difficulty of system's circuit greatly.
In the existing video and audio receiving process realized by using the HDMI, certain mutual delay exists in many occasions between the clock and data of the HDMI and between TMDS channels, part of ASIC chips are output, and the clock and the data do not have good alignment relation, so that errors exist in data receiving through the HDMI.
Disclosure of Invention
The technical problem to be solved by the embodiment of the application is to solve the problem that in the existing video and audio receiving process realized by using an HDMI interface, certain mutual delay exists in many occasions between the clock and data of the HDMI and between TMDS channels, part of ASIC chips are output, the clock and the data do not have a good alignment relation, and the data can be received by the HDMI interface in an error manner.
In order to solve the above problem, an embodiment of the present application provides an HDMI receiving method, which is applied to a receiving end, where the receiving end includes an odd number acquisition module and an even number acquisition module, and the receiving end is connected to a transmitting end through an HDMI interface, and the method includes:
receiving transmission information sent by a sending end, wherein the transmission information comprises a plurality of transmission data;
acquiring transmission data of a preset data amount from the plurality of transmission data through an odd number acquisition module to generate a first detection data group, and acquiring the transmission data of the preset data amount from the plurality of transmission data through an even number acquisition module to generate a second detection data group; the first detection data group and the first data in the second detection data group are separated by one data bit in the plurality of transmission data;
judging whether the first detection data group and the second detection data group contain a preset standard transmission data group or not;
and when the first detection data group comprises the preset standard data group, receiving the data sent by the sending end through the odd number acquisition module, and when the second detection data group comprises the preset standard data group, receiving the data sent by the sending end through the even number acquisition module.
Further, the plurality of transmission data are N transmission data, N > 0, N is a preset integer, the acquiring, by an odd number acquisition module, transmission data of a preset data amount from the plurality of transmission data to generate a first detection data set, and the acquiring, by an even number acquisition module, transmission data of a preset data amount from the plurality of transmission data to generate a second detection data set includes:
acquiring M transmission data from a first transmission data in the N transmission data by the odd number acquisition module to generate a first detection data group, and acquiring M transmission data from a second transmission data in the N transmission data by the even number acquisition module to generate a second detection data group; wherein N is more than or equal to M and more than 0, and M is a preset integer.
Further, after determining whether the first detection data set and the second detection data set include a preset standard data set, the method further includes:
when the first detection data group comprises the preset standard data group, emptying the even number acquisition module and closing the even number acquisition module;
and when the second detection data group comprises the preset standard data group, emptying the odd number acquisition module and closing the odd number acquisition module.
Further, N is 12 and M is 10.
Further, the predetermined standard transmission data set includes a control code in the HDMI protocol and/or a video synchronization code in front of video data in the HDMI protocol.
The utility model provides a HDMI receiving arrangement, is applied to the receiving terminal, the receiving terminal includes odd number collection module and even number collection module, the receiving terminal passes through the HDMI interface connection transmitting terminal, the device includes:
the transmission information receiving module is used for receiving transmission information sent by a sending end, and the transmission information comprises a plurality of transmission data;
the detection data set generation module is used for acquiring transmission data with preset data quantity from the plurality of transmission data through the odd number acquisition module to generate a first detection data set, and acquiring the transmission data with the preset data quantity from the plurality of transmission data through the even number acquisition module to generate a second detection data set; the first detection data group and the first data in the second detection data group are separated by one data bit in the plurality of transmission data;
the judging module is used for judging whether the first detection data group and the second detection data group contain a preset standard transmission data group or not;
and the receiving module is used for receiving the data sent by the sending end through the odd number acquisition module when the first detection data group contains the preset standard data group, and receiving the data sent by the sending end through the even number acquisition module when the second detection data group contains the preset standard data group.
Further, the plurality of transmission data are N transmission data, N > 0, N is a preset integer, and the detection data group generation module includes:
the detection data group generation submodule is used for acquiring M transmission data from the first transmission data in the N transmission data through the odd number acquisition module to generate a first detection data group, and acquiring M transmission data from the second transmission data in the N transmission data through the even number acquisition module to generate a second detection data group; wherein N is more than or equal to M and more than 0, and M is a preset integer.
Further, the apparatus further comprises:
the first emptying processing module is used for emptying the even number acquisition module and closing the even number acquisition module when the first detection data group comprises the preset standard data group;
and the second emptying processing module is used for emptying the odd number acquisition module and closing the odd number acquisition module when the second detection data group comprises the preset standard data group.
Further, N is 12 and M is 10.
Further, the predetermined standard transmission data set includes a control code in the HDMI protocol and/or a video synchronization code in front of video data in the HDMI protocol.
Compared with the prior art, the embodiment is applied to the receiving end which comprises an odd number acquisition module and an even number acquisition module, the receiving end is connected with the sending end through the HDMI interface, the transmission information sent by the sending end is received, the transmission information comprises a plurality of transmission data, the transmission data with the preset data volume is collected from the plurality of transmission data through the odd number collection module to generate a first detection data group, acquiring transmission data with a preset data amount from a plurality of transmission data through an even number acquisition module to generate a second detection data group, judging whether the first detection data group and the second detection data group contain a preset standard transmission data group or not, when the first detection data group comprises a preset standard data group, the data sent by the sending end is received through the odd number acquisition module, and when the second detection data group comprises a preset standard data group, receiving data sent by the sending end through an even number acquisition module. And then through discerning the standard transmission data set that sets for in advance, the initial position of the data that the sending end sent has accurately been discerned, has avoided the received data mistake that the delay caused.
Drawings
Fig. 1 is a schematic diagram of an HDMI link transmission framework according to an embodiment;
fig. 2 is a schematic diagram illustrating an alignment relationship between a clock and data in a transmission link according to an embodiment;
fig. 3 is a schematic block diagram of an HDMI receiving system according to an embodiment;
fig. 4 is a schematic flowchart illustrating steps of an HDMI receiving method according to an embodiment;
fig. 5 is a schematic diagram of an embodiment of receiving transmission data through HDMI;
fig. 6 is a flowchart illustrating an HDMI receiving method according to an embodiment;
fig. 7 is a schematic structural diagram of an HDMI receiving apparatus according to an embodiment.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
A High Definition Multimedia Interface (HDMI) is a fully digital video and audio transmission Interface, and can transmit uncompressed audio and video signals. The HDMI can be used for set-top boxes, DVD players, personal computers, televisions, game hosts, comprehensive amplifiers, digital stereos, televisions and other equipment. HDMI can send audio frequency and video signal simultaneously, because audio frequency and video signal adopt same wire rod, simplifies the installation degree of difficulty of system's circuit greatly.
In the existing video and audio receiving process implemented by using an HDMI interface, certain mutual delay exists in many occasions between a clock and data of the HDMI and between Transition-minimized differential signaling (TMDS) channels, a part of Application Specific Integrated Circuit (ASIC) chips output the signals, and the clock and the data do not have a good alignment relationship, so that errors exist in receiving the data through the HDMI interface.
Embodiments of the present application are particularly directed to the following problems:
based on a Field Programmable Gate Array (FPGA) device, video and audio reception realized by using an HDMI interface, a Phase Locked Loop (PLL) in the FPGA and a clock output by the PLL are limited, and particularly, only 1 to 2 PLLs exist in some FPGAs, which results in insufficient clock resources. In many situations, certain mutual delay exists between the clock and data of the HDMI and between TMDS channels, and the clock and the data do not have good alignment relation when part of ASIC chips are output.
At present, the scheme for realizing HDMI reception by using FPGA is more, and the implementation method is based on sampling by double clock output by PLL, restoring data, and depending on the pixel relationship between the pixel clock transmitted by HDMI and the pixel in the clock, restoring after using the data sampled by double edges, extracting control _ token, info frame, and video frame of HDMI from the restored data.
The structure of the IOB of the FPGA is an IDDR structure, each time, a clock and data are 2 bits sampled, so that the phase of a clock which is 5 times of the output of a PLL (phase locked loop) and the phase of an input pixel clock are required to be in strict alignment relation, the decoded data are just aligned to the data of a rising edge and a falling edge, and the pixel clock is strictly aligned to 10 bits of the pixel clock.
In HDMI reception in ASIC, PLL uses different phase relations of multiple 5 times clocks to sample, and makes up the alignment relation between pixel clock and data channel, and PLL in FPGA and PLL output clock channel are limited, when clock resource of FPGA uses too much, PLL does not have enough clock for other purpose, resulting in system function defect or selecting higher end FPGA to implement.
If the deviation between the edge of the output clock of the PLL in the FPGA and the data is more than half period or more than 1 bit deviation exists between the data channels, the correct data can not be correctly decoded or the data channels can not be output simultaneously.
As shown in fig. 1, a schematic diagram of an HDMI link transmission framework is shown, in which at least 4 pairs of TMDS links, a pair of clocks and three pairs of data channels are required in an HDMI transmission link. As shown in fig. 2, a schematic diagram of clock and DATA alignment in a transmission link is shown, where TMDS _ CLK is clock, TMDS _ DATA is DATA, and the clock to DATA rate ratio is 1: 10.
If the PLL needs to use the source synchronous mode according to the clock and data alignment relationship in fig. 2, the recovered parallel clock and the serial clock need to have a strict 0 degree phase alignment relationship, and the recovered parallel clock and the HDMI received link clock are also strictly aligned.
To solve the above problem, as shown in fig. 3, an architecture diagram of an HDMI receiving system according to an embodiment includes: a receiving end 1 and a transmitting end 2. The receiving end 1 is connected with the transmitting end 2, and the connection can be electric connection or wireless connection. In an embodiment, an even number acquisition module acquires transmission data of a preset data amount from a plurality of transmission data to generate a second detection data group, and determines whether the first detection data group and the second detection data group contain a preset standard transmission data group, when the first detection data group contains the preset standard data group, the odd number acquisition module receives data sent by a sending end, and when the second detection data group contains the preset standard data group, the even number acquisition module receives data sent by the sending end. And then through discerning the standard transmission data set that sets for in advance, the initial position of the data that the sending end sent has accurately been discerned, has avoided the received data mistake that the delay caused.
As shown in fig. 4, a schematic flow chart of an HDMI receiving method proposed in this embodiment is applied to a receiving end, where the receiving end includes an odd number acquisition module and an even number acquisition module, the receiving end is connected to a transmitting end through an HDMI interface,
the method specifically comprises the following steps:
in an example of the present application, the plurality of transmission data are N transmission data, N > 0, N is a preset integer, the acquiring, by an odd number, a first detection data set from the transmission data of the plurality of transmission data acquisition preset data amounts, and the acquiring, by an even number, a second detection data set from the transmission data of the plurality of transmission data acquisition preset data amounts includes:
acquiring M transmission data from a first transmission data in the N transmission data by the odd number acquisition module to generate a first detection data group, and acquiring M transmission data from a second transmission data in the N transmission data by the even number acquisition module to generate a second detection data group; wherein N is more than or equal to M and more than 0, and M is a preset integer.
In an example of the present application, N is 12, and M is 10.
in an example of the present application, the predetermined standard transmission data set includes a control code in the HDMI protocol and/or a video synchronization code in front of video data valid in the HDMI protocol.
The above-described embodiments of the present application will be illustrated below by way of an example, and it should be noted that the present application is not limited to the following example.
Referring to fig. 5, TMDS _ CLK is the HDMI link clock, s _ clkx5 is the ideal sampling clock, PLL _ pclk is the PLL output data parallel clock, and PLL _ pclkx5 is the sampling clock after the PLL output. Pdata is ideal HDMI received data, which is strictly aligned to the link clock, Pdata _ sft is phase shift of 1 bit, rx _ odd and rx _ even are sampled data, and cnt _ en is a sampling reference signal.
Referring to fig. 6, a clock counting criterion is locked by moving a data bit relationship, if received data tmds _ pdat12bit [11:2] (i.e. receiving transmission information sent by a sending end, the transmission information including a plurality of transmission data) is equal to CTRL _ TOKEN of a channel (i.e. determining whether the first detection data group and the second detection data group include a preset standard transmission data group), the counting criterion of an odd bit is cleared, if the data has a deviation of 1 bit, tmds _ pdat12bit [10:1] is equal to CTRL _ TOKEN of the changed channel, at this time, an even counting criterion is cleared (i.e. when the first detection data group includes the preset standard data group, the data sent by the sending end is received by the odd collecting module, and when the second detection data group includes the preset standard data group, receiving the data sent by the sending end through the even number acquisition module). Because CTRL _ TOKEN and GUARD _ BAND are unique sequences in the channel, either the odd standard or the even standard is valid, the sampling standard is selected according to the odd standard, and the subsequent data such as video is always serial data in the channel according to the counting standard, so that the odd type data or the even row data is selected from the recovered data finally to recover the video pixel stream.
All data are firstly converted in a bit serial-to-parallel mode to complete serial-to-parallel conversion of the data. The odd and even sampling modules realize the left-right sliding of different data, and simultaneously, the data passes through the detection module to see whether the TOKEN is detected, if the TOKEN is detected, the TOKEN selection module is told to select corresponding odd and even sampling. The reference sampling module selects odd-even sampling signals, makes reference odd numbers, outputs signals and latches sampled parallel data.
If bit deviation is caused between the HDMI channel and the HDMI channel due to the relationship of wires, PCB plate leads and the like, correct pixel streams can be recovered by sampling the technology, meanwhile, in order to make synchronization of output channels well, the recovered data is checked by using a control code as a buffer area, a small buffer area technology is used, and synchronization of the channels is controlled by sampling modes such as multi-reading or few-reading and the like.
Compared with the prior art, the embodiment is applied to the receiving end which comprises an odd number acquisition module and an even number acquisition module, the receiving end is connected with the sending end through the HDMI interface, the transmission information sent by the sending end is received, the transmission information comprises a plurality of transmission data, the transmission data with the preset data volume is collected from the plurality of transmission data through the odd number collection module to generate a first detection data group, acquiring transmission data with a preset data amount from a plurality of transmission data through an even number acquisition module to generate a second detection data group, judging whether the first detection data group and the second detection data group contain a preset standard transmission data group or not, when the first detection data group comprises a preset standard data group, the data sent by the sending end is received through the odd number acquisition module, and when the second detection data group comprises a preset standard data group, receiving data sent by the sending end through an even number acquisition module. And then through discerning the standard transmission data set that sets for in advance, the initial position of the data that the sending end sent has accurately been discerned, has avoided the received data mistake that the delay caused.
As shown in fig. 7, a schematic diagram of an HDMI receiving apparatus provided in this embodiment of the present application is applied to a receiving end, where the receiving end includes an odd number acquisition module and an even number acquisition module, and the receiving end is connected to a transmitting end through an HDMI interface, and the apparatus specifically includes the following modules:
a transmission information receiving module 701, configured to receive transmission information sent by a sending end, where the transmission information includes multiple pieces of transmission data;
a detection data set generating module 702, configured to acquire transmission data of a preset data amount from the multiple transmission data through an odd number acquisition module to generate a first detection data set, and acquire transmission data of a preset data amount from the multiple transmission data through an even number acquisition module to generate a second detection data set; the first detection data group and the first data in the second detection data group are separated by one data bit in the plurality of transmission data;
a determining module 703, configured to determine whether the first detection data set and the second detection data set include a preset standard transmission data set;
a receiving module 704, configured to receive, through the odd number acquisition module, data sent by the sending end when the first detection data group includes the preset standard data group, and receive, through the even number acquisition module, data sent by the sending end when the second detection data group includes the preset standard data group.
In an example of the present application, the plurality of transmission data is N transmission data, N > 0, and N is a preset integer, and the detection data group generating module 702 includes:
the detection data group generation submodule is used for acquiring M transmission data from the first transmission data in the N transmission data through the odd number acquisition module to generate a first detection data group, and acquiring M transmission data from the second transmission data in the N transmission data through the even number acquisition module to generate a second detection data group; wherein N is more than or equal to M and more than 0, and M is a preset integer.
In an example of the present application, the apparatus further includes:
the first emptying processing module is used for emptying the even number acquisition module and closing the even number acquisition module when the first detection data group comprises the preset standard data group;
and the second emptying processing module is used for emptying the odd number acquisition module and closing the odd number acquisition module when the second detection data group comprises the preset standard data group.
In an example of the present application, N is 12, and M is 10.
In an example of the present application, the predetermined standard transmission data set includes a control code in the HDMI protocol and/or a video synchronization code in front of video data valid in the HDMI protocol.
Compared with the prior art, the embodiment is applied to the receiving end which comprises an odd number acquisition module and an even number acquisition module, the receiving end is connected with the sending end through the HDMI interface, the transmission information sent by the sending end is received, the transmission information comprises a plurality of transmission data, the transmission data with the preset data volume is collected from the plurality of transmission data through the odd number collection module to generate a first detection data group, acquiring transmission data with a preset data amount from a plurality of transmission data through an even number acquisition module to generate a second detection data group, judging whether the first detection data group and the second detection data group contain a preset standard transmission data group or not, when the first detection data group comprises a preset standard data group, the data sent by the sending end is received through the odd number acquisition module, and when the second detection data group comprises a preset standard data group, receiving data sent by the sending end through an even number acquisition module. And then through discerning the standard transmission data set that sets for in advance, the initial position of the data that the sending end sent has accurately been discerned, has avoided the received data mistake that the delay caused.
In an embodiment, an electronic device is provided, comprising a processor, a memory and a computer program stored in the memory and configured to be executed by the processor, the processor implementing the steps of an HDMI receiving method as in the above embodiments when executing the computer program.
In an embodiment, a computer-readable storage medium is provided, which is characterized by comprising a stored computer program, wherein when the computer program runs, the apparatus where the computer-readable storage medium is located is controlled to execute the steps of the HDMI receiving method in the above embodiment.
The foregoing is a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations are also regarded as the protection scope of the present application.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
Claims (10)
1. The HDMI receiving method is applied to a receiving end, the receiving end comprises an odd number acquisition module and an even number acquisition module, the receiving end is connected with a transmitting end through an HDMI interface, and the method comprises the following steps:
receiving transmission information sent by a sending end, wherein the transmission information comprises a plurality of transmission data;
acquiring transmission data of a preset data amount from the plurality of transmission data through an odd number acquisition module to generate a first detection data group, and acquiring the transmission data of the preset data amount from the plurality of transmission data through an even number acquisition module to generate a second detection data group; the first detection data group and the first data in the second detection data group are separated by one data bit in the plurality of transmission data;
judging whether the first detection data group and the second detection data group contain a preset standard transmission data group or not;
and when the first detection data group comprises the preset standard data group, receiving the data sent by the sending end through the odd number acquisition module, and when the second detection data group comprises the preset standard data group, receiving the data sent by the sending end through the even number acquisition module.
2. The HDMI receiving method according to claim 1, wherein the plurality of transmission data are N transmission data, N > 0, N being a preset integer, and wherein the acquiring, by an odd number acquisition module, transmission data of a preset data amount from the plurality of transmission data to generate a first detection data set, and the acquiring, by an even number acquisition module, transmission data of a preset data amount from the plurality of transmission data to generate a second detection data set comprises:
acquiring M transmission data from a first transmission data in the N transmission data by the odd number acquisition module to generate a first detection data group, and acquiring M transmission data from a second transmission data in the N transmission data by the even number acquisition module to generate a second detection data group; wherein N is more than or equal to M and more than 0, and M is a preset integer.
3. The HDMI receiving method according to claim 1, wherein said determining whether the first detection data set and the second detection data set include a predetermined standard data set further comprises:
when the first detection data group comprises the preset standard data group, emptying the even number acquisition module and closing the even number acquisition module;
and when the second detection data group comprises the preset standard data group, emptying the odd number acquisition module and closing the odd number acquisition module.
4. The HDMI receiving method according to claim 2, wherein N is 12 and M is 10.
5. The HDMI receiving method of claim 1, wherein the predetermined standard transmission data set comprises a control code in the HDMI protocol and/or a video synchronization code in the HDMI protocol in which video data is valid as a preamble.
6. The utility model provides a HDMI receiving arrangement, its characterized in that is applied to the receiving terminal, the receiving terminal includes odd number collection module and even number collection module, the receiving terminal passes through the HDMI interface connection transmitting terminal, the device includes:
the transmission information receiving module is used for receiving transmission information sent by a sending end, and the transmission information comprises a plurality of transmission data;
the detection data set generation module is used for acquiring transmission data with preset data quantity from the plurality of transmission data through the odd number acquisition module to generate a first detection data set, and acquiring the transmission data with the preset data quantity from the plurality of transmission data through the even number acquisition module to generate a second detection data set; the first detection data group and the first data in the second detection data group are separated by one data bit in the plurality of transmission data;
the judging module is used for judging whether the first detection data group and the second detection data group contain a preset standard transmission data group or not;
and the receiving module is used for receiving the data sent by the sending end through the odd number acquisition module when the first detection data group contains the preset standard data group, and receiving the data sent by the sending end through the even number acquisition module when the second detection data group contains the preset standard data group.
7. The HDMI reception apparatus according to claim 6, wherein the plurality of transmission data is N transmission data, N > 0, N being a preset integer, and the detection data group generation module comprises:
the detection data group generation submodule is used for acquiring M transmission data from the first transmission data in the N transmission data through the odd number acquisition module to generate a first detection data group, and acquiring M transmission data from the second transmission data in the N transmission data through the even number acquisition module to generate a second detection data group; wherein N is more than or equal to M and more than 0, and M is a preset integer.
8. The HDMI reception apparatus according to claim 6, further comprising:
the first emptying processing module is used for emptying the even number acquisition module and closing the even number acquisition module when the first detection data group comprises the preset standard data group;
and the second emptying processing module is used for emptying the odd number acquisition module and closing the odd number acquisition module when the second detection data group comprises the preset standard data group.
9. The HDMI sink device of claim 7, wherein N is 12 and M is 10.
10. The HDMI receiver of claim 6, wherein the predetermined standard transmission data set comprises a control code in the HDMI protocol and/or a video synchronization code in the HDMI protocol before the video data is valid.
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