CN220156554U - Analog and digital mixed receiving wireless transmission system - Google Patents
Analog and digital mixed receiving wireless transmission system Download PDFInfo
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- CN220156554U CN220156554U CN202320952156.4U CN202320952156U CN220156554U CN 220156554 U CN220156554 U CN 220156554U CN 202320952156 U CN202320952156 U CN 202320952156U CN 220156554 U CN220156554 U CN 220156554U
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Abstract
The utility model discloses an analog and digital mixed receiving wireless transmission system, which comprises: the device comprises a first radio frequency circuit, a second radio frequency circuit, a digital decoding module, an analog image transmission module, a baseband and information source decoding chip, a comparator, an FPGA chip, and a display module, wherein the digital decoding module and the analog image transmission module are respectively connected with the first radio frequency circuit and the second radio frequency circuit, the baseband and information source decoding chip are connected with the digital decoding module, the comparator is connected with the analog image transmission module, the FPGA chip is respectively connected with the comparator, the baseband and the information source decoding chip, and the display module is connected with the FPGA chip. The utility model lays out the traditional analog receiver and the emerging digital receiver on one device, adopts self-adaptive signal identification to identify whether the signal is sent by the digital transmitter or the signal sent by the analog transmitter, and further selects the digital interface output display or the analog interface output display according to the requirement.
Description
Technical Field
The utility model relates to the technical field of wireless image transmission, in particular to an analog and digital hybrid receiving wireless image transmission system.
Background
With the development of wireless image transmission systems in recent years, the demand field for wireless image transmission is also increasing. In particular, with the development of unmanned aerial vehicle, FPV, VR, video shooting and other applications in recent years, wireless transmission of video and images is also being newly changed. In particular the transition from analog to digital image transmission. Analog image transmission is initially emerging because of the free line image channel bandwidth limitations, and the susceptibility to external interference, and susceptibility to reflected signals, etc. But as the requirements of people on image quality are higher and higher, more digital image transmission is emerging in recent years. Some digital image transmission adopts a four-WIFI scheme, but the digital image transmission is generally influenced by a network, and the time delay is relatively large.
For the existing digital wireless image transmission, the image quality is much better than that of the analog image transmission, but the cost is higher. So for users seeking image quality, the cost requirements are not so high and digital image transmission schemes have been replaced. However, for users with high cost requirements, it is still necessary to use a device compatible with analog image transmission and digital image transmission in the case of continuing analog image transmission devices or arranging analog image transmission devices for many fields, which are not easy to replace in a large area.
Accordingly, the prior art has drawbacks and needs improvement.
Disclosure of Invention
The utility model aims to solve the technical problems that: the analog and digital hybrid receiving wireless image transmission system fully utilizes the advantages of the analog image transmission system and the digital image transmission system, and solves the problems of difficult layout and inconvenient maintenance of analog image transmission and digital image transmission in various fields.
The technical scheme of the utility model is as follows: there is provided an analog, digital hybrid receive wireless transmission system comprising: the device comprises a first radio frequency circuit, a second radio frequency circuit, a digital decoding module, an analog image transmission module, a baseband and information source decoding chip, a comparator, an FPGA chip, and a display module, wherein the digital decoding module and the analog image transmission module are respectively connected with the first radio frequency circuit and the second radio frequency circuit, the baseband and information source decoding chip are connected with the digital decoding module, the comparator is connected with the analog image transmission module, the FPGA chip is respectively connected with the comparator, the baseband and the information source decoding chip, and the display module is connected with the FPGA chip.
Further, the display module includes: and the IT66121 chip is connected with the HDMI display of the IT66121 chip.
Further, the display module includes: TW2865 chip, RCA display connected with said TW2865 chip.
Further, the first radio frequency circuit and the second radio frequency circuit both include: the antenna, with the antenna interface that the antenna is connected, with the first band pass filter circuit that the antenna interface is connected, with the first low noise amplifier circuit that the first band pass filter circuit is connected, with the WP4A+ power divider that the first low noise amplifier circuit is connected, with the radio frequency amplifier circuit that WP4A+ power divider is connected, with the pi decay (pi type attenuator) that radio frequency amplifier circuit is connected.
Further, the digital decoding module includes: and the second low-noise amplifier circuit is connected with the pi attenuation, the second band-pass filter circuit is connected with the second low-noise amplifier circuit, and the digital decoding chip is connected with the second band-pass filter circuit.
Further, the model of the digital decoding chip is DM6300, and the model of the baseband and source decoding chip is DM5680.
Further, the analog image transmission module adopts an MM238R chip.
By adopting the scheme, the utility model provides an analog and digital mixed receiving wireless image transmission system, wherein a traditional analog receiver and an emerging digital receiver are arranged on one device, and self-adaptive signal identification is adopted to identify whether signals are transmitted by a digital transmitter or signals transmitted by the analog transmitter, so that a digital interface output display or an analog interface output display is selected according to requirements.
Drawings
FIG. 1 is a functional block diagram of an embodiment of the present utility model.
Detailed Description
The utility model will be described in detail below with reference to the drawings and the specific embodiments.
Referring to fig. 1, the present embodiment provides an analog-digital hybrid receiving wireless transmission system, which includes: the device comprises a first radio frequency circuit, a second radio frequency circuit, a digital decoding module and an analog image transmission module 10 which are respectively connected with the first radio frequency circuit and the second radio frequency circuit, a baseband and information source decoding chip 11 connected with the digital decoding module, a comparator connected with the analog image transmission module 10, an FPGA chip 12 respectively connected with the comparator, the baseband and information source decoding chip 11, and a display module connected with the FPGA chip 12. The analog image transmission module 10 adopts an MM238R chip. The chip model adopted by the FPGA chip 12 is: XC7a50T-2CSG324.
In this embodiment, the display module includes: an IT66121 chip 13, and an HDMI display 14 chip-connected to the IT66121 chip 13.
In this embodiment, the display module further includes: TW286515, RCA display 16 connected with TW2865 chip 15.
In this embodiment, the first radio frequency circuit and the second radio frequency circuit each include: an antenna 17, an antenna interface SMA18 connected to the antenna 17, a first band-pass filter circuit (BPF 1) 19 connected to the antenna interface SMA18, a first low noise amplifier circuit (LNA 1) 20 connected to the first band-pass filter circuit (BPF 1) 19, a WP4a+ power divider 21 connected to the first low noise amplifier circuit (LNA 1) 20, a radio frequency amplifier circuit 22 connected to the WP4a+ power divider 21, and pi 23 (pi-type attenuator) connected to the radio frequency amplifier circuit 22.
In this embodiment, the digital decoding module includes: a second low noise amplifier circuit (LNA 2) 24 connected to the pi-stage 23, a second band-pass filter circuit (BPF 2) 25 connected to the second low noise amplifier circuit (LNA 2) 24, and a digital decoding chip 26 connected to the second band-pass filter circuit (BPF 2) 25. The model of the digital decoding chip is DM6300, and the model of the baseband and source decoding chip 11 is DM5680.
The signals transmitted and received by the wireless digital image transmission and the wireless analog image transmission are subjected to a first radio frequency circuit and a second radio frequency circuit, namely, the signals are attenuated from the antenna 17- > the antenna interface SMA- > the BPF1- > the LNA1- > the WP4A+ power divider- > the RFSW- > pi. The digital circuit signal is filtered by the second low noise amplifier circuit and the second pass filter, then sent to the digital decoding chip DM6300, decoded by the digital decoding chip, sent to the DM5680 chip for baseband channel decoding and source decoding, finally recovered video signal and sent to the FPGA chip 12 for processing. In order to obtain better image quality, two paths of analog radio frequency signals are sent to the FPGA for processing through a comparator to select signals with good analog image signals. The analog video signal is converted into DVP signal by TW2865 chip and sent to FPGA. The analog video signal and the high-definition digital video signal processed by the FPGA are output to the HDMI TX chip ITE66121 according to the user selection, and the DVP signal is converted into an HDMI signal for display.
In summary, the present utility model provides an analog-digital hybrid receiving wireless transmission system, which lays out a traditional analog receiver and an emerging digital receiver on a device, and adopts adaptive signal recognition to recognize whether the signal is transmitted by a digital transmitter or a signal transmitted by an analog transmitter, so as to select whether the digital interface outputs to display or the analog interface outputs to display according to the requirement.
The foregoing description of the preferred embodiment of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (7)
1. An analog-to-digital hybrid receive wireless transmission system, comprising: the device comprises a first radio frequency circuit, a second radio frequency circuit, a digital decoding module, an analog image transmission module, a baseband and information source decoding chip, a comparator, an FPGA chip, and a display module, wherein the digital decoding module and the analog image transmission module are respectively connected with the first radio frequency circuit and the second radio frequency circuit, the baseband and information source decoding chip are connected with the digital decoding module, the comparator is connected with the analog image transmission module, the FPGA chip is respectively connected with the comparator, the baseband and the information source decoding chip, and the display module is connected with the FPGA chip.
2. An analog, digital hybrid receive wireless transmission system according to claim 1, wherein said display module comprises: and the IT66121 chip is connected with the HDMI display of the IT66121 chip.
3. An analog, digital hybrid receive wireless transmission system according to claim 1, wherein said display module comprises: TW2865 chip, RCA display connected with said TW2865 chip.
4. The analog-to-digital hybrid receive wireless transmission system of claim 1, wherein the first rf circuit and the second rf circuit each comprise: the antenna, with the antenna interface that the antenna is connected, with the first band pass filter circuit that the antenna interface is connected, with the first low noise amplifier circuit that the first band pass filter circuit is connected, with the WP4A+ power divider that the first low noise amplifier circuit is connected, with the radio frequency amplifier circuit that WP4A+ power divider is connected, with the pi decline that the radio frequency amplifier circuit is connected.
5. The analog, digital hybrid receive wireless transmission system of claim 4, wherein said digital decoding module comprises: and the second low-noise amplifier circuit is connected with the pi attenuation, the second band-pass filter circuit is connected with the second low-noise amplifier circuit, and the digital decoding chip is connected with the second band-pass filter circuit.
6. The analog-to-digital hybrid receive wireless transmission system of claim 5, wherein said digital decoding chip is model DM6300 and said baseband and source decoding chip is model DM5680.
7. An analog and digital hybrid receive wireless transmission system according to claim 1, wherein the analog transmission module employs an MM238R chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320952156.4U CN220156554U (en) | 2023-04-24 | 2023-04-24 | Analog and digital mixed receiving wireless transmission system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320952156.4U CN220156554U (en) | 2023-04-24 | 2023-04-24 | Analog and digital mixed receiving wireless transmission system |
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| Publication Number | Publication Date |
|---|---|
| CN220156554U true CN220156554U (en) | 2023-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202320952156.4U Active CN220156554U (en) | 2023-04-24 | 2023-04-24 | Analog and digital mixed receiving wireless transmission system |
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| CN (1) | CN220156554U (en) |
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2023
- 2023-04-24 CN CN202320952156.4U patent/CN220156554U/en active Active
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