CN108156402B - Transmitting and receiving device and audio and video wireless transmission system - Google Patents
Transmitting and receiving device and audio and video wireless transmission system Download PDFInfo
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- CN108156402B CN108156402B CN201711493029.8A CN201711493029A CN108156402B CN 108156402 B CN108156402 B CN 108156402B CN 201711493029 A CN201711493029 A CN 201711493029A CN 108156402 B CN108156402 B CN 108156402B
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 32
- 238000012545 processing Methods 0.000 claims abstract description 45
- 238000006243 chemical reaction Methods 0.000 claims abstract description 34
- 230000006978 adaptation Effects 0.000 claims abstract description 31
- 238000010586 diagram Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/38—Transmitter circuitry for the transmission of television signals according to analogue transmission standards
- H04N5/40—Modulation circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/455—Demodulation-circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
- H04N7/0125—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level one of the standards being a high definition standard
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- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a transmitting and receiving device and an audio and video wireless transmission system, wherein the transmitting device comprises a first protocol conversion module, a first processing unit, a first interface adaptation unit, a modulation module and a first antenna which are connected in sequence, and the first protocol conversion module comprises a signal source interface which is used for being connected with a video source; the first protocol conversion module is used for acquiring audio and video data from a video source and converting the audio and video data into HDMI protocol data; the first processing unit is used for converting HDMI protocol data into interface data, the format of the interface data is matched with that of the first interface adaptation unit, and the first interface adaptation unit is used for transmitting the interface data to the modulation module; the modulation module is used for modulating interface data and converting the modulated data into broadband radio frequency signals through the first antenna. The source interface can adopt a high transmission rate and a common interface, such as a type_C interface; and wireless transmission of audio and video signals can be realized, and greater convenience is provided for users.
Description
Technical Field
The invention relates to a multimedia transmission technology, in particular to a transmitting and receiving device and an audio and video wireless transmission system.
Background
With the upgrade of the interfaces of new generation intelligent devices such as mobile phones and notebook computers, for example, the upgrade of the traditional USB interface to a type_c high-speed interface, the intelligent devices can still satisfy the ultra-high definition video transmission. For example, the rate of type_C single line can reach 10Gbps, and the total rate of 4 lines can reach 40Gbps. However, the wired transmission distance of the interface of the intelligent device is short, for example, the wired transmission distance of type_c can only reach about 2 meters at most; and the wiring required for wired transmission also limits the use of high definition video transmission in some situations.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a transmitting and receiving device and an audio-video wireless transmission system, wherein a source interface can adopt a common interface with high transmission rate, such as a type_C interface; and wireless transmission of audio and video signals can be realized, and greater convenience is provided for users.
The invention adopts the following technical scheme:
the transmitting device comprises a first protocol conversion module, a first processing unit, a first interface adaptation unit, a modulation module and a first antenna which are sequentially connected, wherein the first protocol conversion module comprises a signal source interface, and the signal source interface is used for being connected with a video source;
the first protocol conversion module is used for acquiring audio and video data from a video source and converting the audio and video data into HDMI protocol data;
the first processing unit is used for converting HDMI protocol data into interface data, the format of the interface data is matched with the first interface adaptation unit, and the first interface adaptation unit is used for transmitting the interface data to the modulation module;
the modulation module is used for modulating interface data and converting the modulated data into broadband radio frequency signals through the first antenna.
Further, the source interface is a type_c interface, and the first protocol conversion module is configured to obtain audio/video data in a type_c format from a video source, and convert the audio/video data into HDMI protocol data.
Further, the first processing unit includes a first processor configured with an OFDM-MIMO baseband algorithm.
Further, the first interface adapting unit comprises a plurality of groups of first signal lines, and the first signal lines are provided with protection devices;
the uniform end of the first signal line is connected with the first processing unit, and the other end of the first signal line is connected with the modulation module.
Further, the first antenna is a 60Ghz broadband antenna, and the modulation module is used for modulating the interface data into a 60Ghz broadband radio frequency signal.
The receiving device comprises a second antenna, a demodulation module, a second interface adaptation unit and a second processing unit which are sequentially connected;
the second antenna is used for converting the acquired broadband radio frequency signal into data to be demodulated, the demodulation module is used for demodulating the data to be demodulated into data to be processed, and the format of the data to be processed is matched with the second interface adaptation unit;
the second interface adaptation unit is used for transmitting the data to be processed to the second processing unit, and the second processing unit is used for converting the data to be processed into HDMI playing data;
the second processing unit comprises an HDMI output interface, and is used for transmitting HDMI playing data to a playing device through the HDMI output interface.
Further, the receiving device further comprises a second protocol conversion module, and the second protocol conversion module is connected to the second processing unit;
the second protocol conversion module comprises a data output interface which is used for being connected with a data input interface of the playing device; the second protocol conversion module is configured to convert the HDMI play data into type_c play data, and send the type_c play data to the data output interface.
Further, the second processing unit includes a second processor configured with an OFDM-MIMO baseband algorithm.
Further, the second interface adapting unit comprises a plurality of groups of second signal lines, and the second signal lines are provided with protection devices;
the uniform end of the second signal wire is connected with the demodulation module, and the other end of the second signal wire is connected with the second processing unit.
An audio and video wireless transmission system comprises the transmitting device and the receiving device.
Compared with the prior art, the invention has the beneficial effects that: the transmitting device obtains audio and video data from a video source through a first protocol conversion module, converts the audio and video data into HDMI protocol data, the first processing unit can convert the HDMI protocol data into interface data matched with the first interface adaptation unit, the interface data are transmitted to the modulation module, and the modulation module and the first antenna output the processed audio and video data into broadband radio frequency signals. Thus, the source interface may employ a high transmission rate, using a popular interface, such as the type_c interface.
The receiving device can acquire the broadband radio frequency signal transmitted by the transmitting device through the second antenna and the demodulation module, and convert the broadband radio frequency signal into data to be processed, which is matched with the second interface adaptation unit, and then the second processing unit converts the data to be processed into HDMI playing data which can be played by the playing device.
The wireless transmission of audio and video signals can be realized, and greater convenience is provided for users.
Drawings
Fig. 1 is a schematic structural diagram of a transmitting device according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of the first interface adapting unit in fig. 1;
fig. 3 is a schematic structural diagram of a receiving device according to a second embodiment of the present invention;
fig. 4 is a schematic structural diagram of the second interface adaptation unit in fig. 3.
In the figure: 100. a transmitting device; 110. a first protocol conversion module; 120. a first processing unit; 130. a first interface adaptation unit; 140. a modulation module; 150. a first antenna; 200. a receiving device; 210. a second antenna; 220. a demodulation module; 230. a second interface adaptation unit; 240. a second processing unit; 241. an HDMI output interface; 250. a second protocol conversion module; 251. a data output interface; 10. a video source; 20. and a playing device.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and detailed description, wherein it is to be understood that, on the premise of no conflict, the following embodiments or technical features may be arbitrarily combined to form new embodiments.
Example 1
Fig. 1 shows a transmitting device 100, which includes a first protocol conversion module 110, a first processing unit 120, a first interface adapting unit 130, a modulation module 140 and a first antenna 150 sequentially connected, where the first protocol conversion module 110 includes a source interface, and the source interface is used to connect to a video source 10.
The first protocol conversion module 110 is configured to obtain audio and video data from the video source 10, and convert the audio and video data into HDMI protocol data.
As a preferred embodiment, the source interface is a type_c interface, and the first protocol conversion module 110 is configured to obtain audio/video data in a type_c format from the video source 10, and convert the audio/video data into HDMI protocol data.
the type_c interface and converting the audio/video data in the type_c format into HDMI protocol data can be implemented by the prior art, such as a related processor chip and algorithm, which are not described herein.
The first processing unit 120 is configured to convert HDMI protocol data into interface data, where the format of the interface data is matched with the first interface adaptation unit 130, and the first interface adaptation unit 130 is configured to transmit the interface data to the modulation module 140.
As a preferred embodiment, the first processing unit 120 comprises a first processor configured with an OFDM-MIMO baseband algorithm.
The OFDM-MIMO technology uses multiple sets of transmit antennas and multiple sets of receive antennas. Such a design may provide a spatial diversity effect and multiple spatial channels provided by multiple groups of antennas may be difficult to attenuate all at the same time. It is a quite effective way to solve the impact of signal attenuation on transmission. And the bit stream is divided into a plurality of branches by serial-parallel conversion, and each branch is required to undergo OFDM processes such as coding, interleaving, quadrature Amplitude Modulation (QAM) mapping, pilot signal insertion, IFFT conversion, cyclic prefix addition and the like.
The OFDM-MIMO algorithm itself belongs to the prior art and will not be described in detail. The embodiment of the invention realizes the modulation algorithm with ultra-high bandwidth by using the OFDM-MIMO algorithm, so that the transmitting device 100 can provide higher data transmission rate, and therefore, the non-compression zero-delay transmission of the 4k30hz video can be realized based on the transmitting device 100.
As a preferred embodiment, as shown in fig. 2, the first interface adaptation unit 130 includes a plurality of groups of first signal lines, and protection devices are disposed on the first signal lines. The first signal line has one end connected to the first processing unit 120 and the other end connected to the modulation module 140. In this embodiment, the first interface adaptation unit 130 includes four sets of first signal lines txc_n and txc_ P, TX0 _0_n and TX 0_P, TX 1_N and TX 1_P, TX 2_N and TX 2_P; the protection device is implemented by a low capacitance ESD protection chip, such as an RClamp0524P chip.
The format of the interface data is matched with the first interface adapting unit 130, specifically, the first processing unit 120 converts the HDMI protocol data into interface data that can be transferred by multiple signal lines, so as to realize the matching of electrical characteristics between the interfaces, so as to meet the requirements of the OFDM-MIMO technology.
The modulation module 140 is configured to modulate the interface data and convert the modulated data into a wideband radio frequency signal through the first antenna 150.
As a preferred embodiment, the first antenna 150 is a 60Ghz broadband antenna, and the modulation module 140 is configured to modulate the interface data to a 60Ghz broadband radio frequency signal. The antenna technology and the modulation of the radio frequency signal can be realized by the prior art, and are not described in detail.
Further, the first antenna 150 may be a dual polarized antenna, so that the problem of orientation of millimeter wave transmission can be better solved.
In the transmitting device 100 provided in the embodiment of the present invention, the first protocol conversion module 110 converts the audio and video data obtained from the video source 10 into HDMI protocol data, the first processing unit 120 may convert the HDMI protocol data into interface data matched with the first interface adapting unit 130, and transmit the interface data to the modulation module 140, and then the modulation module 140 and the first antenna 150 output the processed audio and video data as a wideband radio frequency signal. Therefore, the source interface can adopt a high transmission rate and a common interface such as a type_C interface is used; and the audio and video signals can be transmitted wirelessly, thereby providing greater convenience for users.
Example two
The receiving apparatus 200 shown in fig. 3 includes a second antenna 210, a demodulation module 220, a second interface adaptation unit 230, and a second processing unit 240, which are sequentially connected.
The second antenna 210 is configured to convert the acquired wideband radio frequency signal into data to be demodulated.
The second antenna 210 is a 60Ghz broadband antenna as a preferred embodiment. Further, the second antenna 210 may be a dual polarized antenna, which may better solve the problem of orientation of millimeter wave transmission.
The demodulation module 220 is configured to demodulate data to be demodulated into data to be processed, where a format of the data to be processed is matched with the second interface adaptation unit 230.
The antenna technology and the solution of the radio frequency signal can be implemented by the prior art, and will not be described in detail.
The second interface adapting unit 230 is configured to transmit the data to be processed to the second processing unit 240, and the second processing unit 240 is configured to convert the data to be processed into HDMI playback data.
As a preferred embodiment, as shown in fig. 4, the second interface adaptation unit 230 includes a plurality of groups of second signal lines, and protection devices are disposed on the second signal lines; the second signal line has one end connected to the demodulation module 220 and the other end connected to the second processing unit 240.
The format of the data to be processed is matched with the second interface adapting unit 230, specifically, the demodulating module 220 demodulates the data to be demodulated into the data to be processed which can be transmitted by the multipath signal lines, so as to realize the matching of the electrical characteristics between the interfaces, and make the data to be demodulated meet the requirements of the OFDM-MIMO technology.
The embodiment of the invention realizes the modulation algorithm with ultra-high bandwidth by using the OFDM-MIMO algorithm, so that the receiving device 200 can provide higher data transmission rate, and therefore, the non-compression zero-delay transmission of the 4k30hz video can be realized based on the receiving device 200.
In the present embodiment, the second interface adaptation unit 230 includes four sets of second signal lines ck_n and ck_ P, D0_n and d0_ P, D1 _1_n and d1_ P, D2_n and d2_p; the protection device is implemented by a low capacitance ESD protection chip, such as an RClamp0524P chip.
As a preferred embodiment, the second processing unit 240 also includes a second processor configured with an OFDM-MIMO baseband algorithm. So as to integrate the data to be processed transmitted by a plurality of groups of second signal lines and convert the data to HDMI playing data.
In this embodiment, the second processing unit 240 includes an HDMI output interface 241, and the second processing unit 240 is configured to transmit HDMI playback data to the playback device 20 through the HDMI output interface 241, such as an audio-video display of the HDMI interface for playback.
The receiving device 200 provided in the embodiment of the present invention may obtain, through the second antenna 210 and the demodulation module 220, the wideband radio frequency signal transmitted by the transmitting device 100 in the first embodiment, and convert the wideband radio frequency signal into the data to be processed matched with the second interface adapting unit 230, and then the second processing unit 240 converts the data to be processed into HDMI playing data that can be played by the playing device 20. The wireless transmission of audio and video signals can be realized, and greater convenience is provided for users.
As a preferred embodiment, as shown in fig. 3, the receiving apparatus 200 further includes a second protocol conversion module 250, and the second protocol conversion module 250 is connected to the second processing unit 240.
In the present embodiment, the second protocol conversion module 250 includes a data output interface 251, where the data output interface 251 is used to connect with a data input interface of the playing device 20; the second protocol conversion module 250 is configured to convert the HDMI playback data into type_c playback data, and send the type_c playback data to the data output interface 251. Namely, the receiving device 200 also has a type_c interface, and can be connected with the playing device 20 with the type_c interface, so that the ultra-high-definition audio/video transmission distance of the type_c interface is prolonged; the receiving device 200 can flexibly match with an audio-video display of an HDMI interface or an audio-video display of a type_C interface at the same time.
Example III
The transmitting device 100 and the receiving device 200 provided in the embodiment of the present invention may cooperate with each other to implement an audio/video wireless transmission system, which includes the transmitting device 100 in the first embodiment and the receiving device 200 in the second embodiment.
The transmitting device 100 converts the audio and video data acquired from the video source 10 into HDMI protocol data through the first protocol conversion module 110, the first processing unit 120 may convert the HDMI protocol data into interface data matched with the first interface adaptation unit 130, and transmit the interface data to the modulation module 140, and then the modulation module 140 and the first antenna 150 output the processed audio and video data as a wideband radio frequency signal. Thus, the source interface may employ a high transmission rate, using a popular interface, such as the type_c interface.
The receiving apparatus 200 may acquire the wideband radio frequency signal transmitted by the transmitting apparatus 100 through the second antenna 210 and the demodulation module 220, and convert the wideband radio frequency signal into the data to be processed matched with the second interface adaptation unit 230, and then the second processing unit 240 converts the data to be processed into HDMI playback data that can be played by the playback apparatus 20. The wireless transmission of audio and video signals can be realized, and greater convenience is provided for users.
The above embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present invention are intended to be within the scope of the present invention as claimed.
Claims (7)
1. A transmitting device, characterized by: the video source comprises a first protocol conversion module, a first processing unit, a first interface adaptation unit, a modulation module and a first antenna which are sequentially connected, wherein the first protocol conversion module comprises a signal source interface, and the signal source interface is used for being connected with a video source;
the first protocol conversion module is used for acquiring audio and video data from a video source and converting the audio and video data into HDMI protocol data;
the first processing unit is used for converting HDMI protocol data into interface data, the format of the interface data is matched with the first interface adaptation unit, and the first interface adaptation unit is used for transmitting the interface data to the modulation module;
the modulation module is used for modulating interface data and converting the modulated data into broadband radio frequency signals through the first antenna;
the first interface adapting unit comprises a plurality of groups of first signal wires, and the first signal wires are provided with protection devices;
the uniform end of the first signal line is connected with the first processing unit, and the other end of the first signal line is connected with the modulation module.
2. The transmitting device of claim 1, wherein: the information source interface is a type_C interface, and the first protocol conversion module is used for acquiring audio and video data in a type_C format from a video source and converting the audio and video data into HDMI protocol data.
3. The transmitting device of claim 2, wherein: the first processing unit includes a first processor configured with an OFDM-MIMO baseband algorithm.
4. A transmitting device according to any one of claims 1-3, characterized in that: the first antenna is a 60Ghz broadband antenna, and the modulation module is used for modulating interface data into a 60Ghz broadband radio frequency signal.
5. A receiving device characterized by: the device comprises a second antenna, a demodulation module, a second interface adaptation unit and a second processing unit which are sequentially connected;
the second antenna is used for converting the acquired broadband radio frequency signal into data to be demodulated, the demodulation module is used for demodulating the data to be demodulated into data to be processed, and the format of the data to be processed is matched with the second interface adaptation unit;
the second interface adaptation unit is used for transmitting the data to be processed to the second processing unit, and the second processing unit is used for converting the data to be processed into HDMI playing data;
the second processing unit comprises an HDMI output interface, and is used for transmitting HDMI playing data to a playing device through the HDMI output interface;
the second interface adaptation unit comprises a plurality of groups of second signal wires, and protection devices are arranged on the second signal wires;
the uniform end of the second signal wire is connected with the demodulation module, and the other end of the second signal wire is connected with the second processing unit;
the system also comprises a second protocol conversion module, wherein the second protocol conversion module is connected with the second processing unit;
the second protocol conversion module comprises a data output interface which is used for being connected with a data input interface of the playing device; the second protocol conversion module is configured to convert the HDMI play data into type_c play data, and send the type_c play data to the data output interface.
6. The receiving apparatus of claim 5, wherein: the second processing unit includes a second processor configured with an OFDM-MIMO baseband algorithm.
7. An audio and video wireless transmission system is characterized in that: comprising a transmitting device according to any of claims 1-4 and a receiving device according to any of claims 5-6.
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| CN201711493029.8A CN108156402B (en) | 2017-12-30 | 2017-12-30 | Transmitting and receiving device and audio and video wireless transmission system |
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| CN201711493029.8A CN108156402B (en) | 2017-12-30 | 2017-12-30 | Transmitting and receiving device and audio and video wireless transmission system |
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| CN108156402B true CN108156402B (en) | 2024-03-22 |
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| CN111083170A (en) * | 2019-12-31 | 2020-04-28 | 深圳市朗强科技有限公司 | Method and equipment for sending and receiving multimedia data |
| CN112866194A (en) * | 2020-12-31 | 2021-05-28 | 浙江声研科技有限公司 | WiFi6 multifunctional signal protocol box based on 5G |
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| CN108156402A (en) | 2018-06-12 |
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