Control system of random screen

Abstract

The invention discloses a control system of a random screen. The control system comprises a sending end and a receiving display end. The transmitting end is provided with a television broadcast signal input module, a graphic audio processing module, a converter, a first core processing module and a power supply module, and can receive and process DVB-T2 and DVB-S2 signals, convert the signals into HDM I signals and send the HDM I signals to the receiving display end. And the receiving display end is provided with a second communication module, a second core processing module, a power amplifier module and a display screen, and can receive the HDM I signal, decode the HDM I signal and respectively output the decoded HDM I signal to the power amplifier module and the display screen. The system has the characteristics of wide signal receiving range, high processing precision, strong stability, flexibility and good expandability, and provides high-quality audio-visual experience for users. The invention also relates to specific circuit design and chip selection of a plurality of modules, so that efficient operation and signal quality of the system are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of free-to-use screen control, and in particular to a free-to-use screen control system. Background Art

[0002] With the rapid development of science and technology, smart home has become an important part of modern families. Smart home connects various devices in the home through the Internet of Things technology to achieve intelligent management and control. As a new type of smart display screen in the field of smart home, the development of its control system also conforms to the overall trend of smart home.

[0003] China Publication No. CN101753885A discloses a signal output device for a television, a television and a method, wherein the signal output device for the television generally includes a processing unit for processing an input signal to generate an LVDS signal and an audio signal. It is also equipped with a converter for converting the LVDS signal generated by the processing unit into an HDMI signal and outputting it through an HDMI signal output port. In addition, some devices can also convert the audio signal generated by the processing unit into an HDMI signal.

[0004] However, the above patents have the following shortcomings:

[0005] 1. Limited signal input sources: Its signal output device can usually only process signals in specific formats such as VAG, USB, HDMI, etc., and lacks the ability to receive and process TV broadcast signals such as DVB-T2 and DVB-S2.

[0006] 2. Insufficient signal processing accuracy and stability: Its signal reception and processing process is relatively simple, and lacks detailed signal reception and processing modules, resulting in the need to improve the accuracy and stability of signal processing.

[0007] 3. Limited system flexibility and scalability: Signal output devices usually lack the integration of core processing modules and communication modules, which limits the system's ability to process signals and connect and communicate with other devices or systems.

[0008] 4. Lack of complete control system solutions: It mainly focuses on the signal output device itself, but lacks consideration of the entire control system, including the integration of the transmitter and the receiving display, as well as the configuration of auxiliary components such as power supply.

[0009] Therefore, in view of the deficiencies in the prior art, the present invention proposes a control system for a free screen, aiming to solve the above problems and provide a more flexible, stable and scalable control system solution. Summary of the invention

[0010] The present invention overcomes the deficiencies of the above-mentioned technologies and provides a control system for a free screen.

[0011] To achieve the above object, the present invention adopts the following technical solutions:

[0012] A control system of a free screen includes a transmitting end 100 and a receiving display end 200, wherein the transmitting end 100 is provided with:

[0013] The TV broadcast signal input module 11 is used to receive DVB-T2 and DVB-S2 signals and process them into baseband signals, as well as perform demodulation and forward error correction processing;

[0014] A graphics and audio processing module 12, used for converting the processed television broadcast signal into an LVDS signal and an audio signal;

[0015] A converter 13, used for converting the LVDS signal and the audio signal into an HDMI signal;

[0016] The first core processing module 14 is used to receive the HDM I signal output by the converter 13 and send it to the receiving display terminal 200 through the first communication module 15; the power supply module 16 is used to supply power to the sending terminal 100;

[0017] The converter 13 includes an audio input unit 131, an LVDS input unit 132, a first signal processing unit 133 for converting an audio signal and an LVDS signal into an HDMI signal, and an HDMI signal output unit 134 for receiving and outputting the HDMI signal.

[0018] Preferably, the receiving display terminal 200 is provided with:

[0019] The second communication module 21 is used to receive the HDMI signal and the control signal transmitted from the first communication module 15 in the transmitting end 100;

[0020] The second core processing module 22 is used to decode the received HDMI signal and extract the audio signal and LVDS signal respectively;

[0021] The power amplifier module 23 is used to receive the audio signal output by the second core processing module 22 and perform amplification processing;

[0022] The display screen 24 is used to receive and display the LVDS signal output by the second core processing module 22 ; wherein the first communication module 15 interacts and communicates with the second communication module 21 .

[0023] Preferably, the television broadcast signal input module 11 includes: a first receiving and processing module 111 for receiving and processing a DVB-T2 signal into a baseband signal, a second receiving and processing module 112 for receiving and processing a DVB-S2 signal into a baseband signal, and a third receiving and processing module 113 for demodulating and performing forward error correction on the baseband signal received and processed by the first receiving and processing module 111 and the second receiving and processing module 112.

[0024] Preferably, the first receiving and processing module 111 is a tuner chip circuit using a chip model ATBM253; the second receiving and processing module 112 is a digital satellite receiving chip circuit using a chip model RDA5815M; the third receiving and processing module 113 includes a demodulation and decoding chip UDM1 and its peripheral circuits, and the demodulation and decoding chip UDM1 is provided with: a demodulator input pin DEMOD_XI N, a demodulator output pin DEMOD_XOUT, a first automatic gain control pin AGC_T, a second automatic gain control pin AGC_S, a reset pin TCON0 / DEMOD_RSTN and a plurality of data transmission pins for transmitting serial transport stream data.

[0025] Preferably, the graphic audio processing module 12 includes: a first power management unit 121, a first voltage conversion unit 122, a first memory unit 123, a fourth signal processing unit 124, and a first extension unit 125; the first power management unit 121 is responsible for the power supply and management of the entire graphic audio processing module; the first voltage conversion unit 122 is responsible for the power supply and management of the entire graphic audio processing module 12, and the first memory unit 123 is responsible for processing the data transmission and communication between the graphic audio processing module 12 and the memory; the fourth signal processing unit 124 is respectively connected to the first memory unit 123 and the first extension unit 125; the first extension unit 125 is divided into a first function pin portion 1251 for serving as a standard interface of a digital TV receiver, a second function pin portion 1252 for EMMC storage, and a third function pin portion 1253 for serving as a USB interface.

[0026] Preferably, the first signal processing unit 133 includes: a conversion chip U7 with a chip model of LT2611UXC and its peripheral circuits.

[0027] Preferably, the transmitting end 100 is further provided with: a DDR storage module 17 , an EMMC storage module 18 , a USB module 19 and a gyroscope module 20 which are respectively connected to the first core processing module 14 .

[0028] Preferably, the gyroscope module 20 uses a motion sensor chip of model DA228EC.

[0029] Preferably, the first core processing module 14 includes:

[0030] A first data receiving unit 141, configured to receive an HDMI signal output by the converter 13;

[0031] The second signal processing unit 142 is used to decode and process the received HDMI signal;

[0032] The first data transmission unit 143 is used to send the processed data to the receiving display terminal 200 through the first communication module 15;

[0033] The first control unit 144 is used to coordinate and manage the work of the first data receiving unit 141 , the second signal processing unit 142 and the first data transmission unit 143 .

[0034] Preferably, the second core processing module 22 includes:

[0035] The second data receiving unit 221 is used to receive the HDMI signal from the second communication module 21;

[0036] The third signal processing unit 222 is used to decode and process the received HDMI signal to extract the audio signal and the LVDS signal;

[0037] A second data transmission unit 223, used to transmit the processed audio signal and LVDS signal to the power amplifier module and the display screen respectively;

[0038] The second control unit 224 is used to coordinate and manage the work of the second data receiving unit 221 , the third signal processing unit 222 and the second data transmission unit 223 .

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] 1. The system of this case has added a TV broadcast signal input module, which can receive and process two common TV broadcast signals, DVB-T2 and DVB-S2, convert them into baseband signals, and perform demodulation and forward error correction processing, so as to expand the signal reception range and application scenarios of the system. The processed TV broadcast signals are converted into LVDS signals and audio signals respectively through the graphic audio processing module, and then converted into HDMI signals through the converter, so that the system of this case has a more detailed division in the signal processing process, which not only improves the efficiency of signal processing, but also ensures the stability and improvement of signal quality. The setting of the converter enables the system to not only have the ability to convert LVDS signals into HDMI signals, but also supports the conversion of audio signals at the same time, so as to be able to completely output HDMI signals containing video and audio information, providing users with a richer audio-visual experience. The setting of the first core processing module and the first communication module realizes the centralized management of the reception, processing and transmission of HDMI signals, so as to improve the flexibility and scalability of the system, and also provides the possibility of seamless connection with other devices. The setting of the power supply module provides stable and reliable power support for the transmitting end 100. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a structural diagram of the control system in this case.

[0042] Figure 2 It is the circuit diagram of the first receiving and processing module in this case.

[0043] Figure 3 This is the circuit diagram of the second receiving and processing module in this case.

[0044] Figure 4 It is the circuit diagram of the third receiving and processing module in this case.

[0045] Figure 5 This is a circuit diagram of the first power management unit of the graphic audio processing module of this case.

[0046] Figure 6 It is a circuit diagram of the first voltage conversion unit of the graphic audio processing module of the present invention.

[0047] Figure 7 This is a circuit diagram of the first memory unit of the graphic audio processing module of this case.

[0048] Figure 8 It is a circuit diagram of the fourth signal processing unit of the graphic audio processing module of this case.

[0049] Fig. 9 It is a circuit diagram of the first expansion unit of the graphic audio processing module in this case.

[0050] Fig.10This is the circuit diagram of the converter in this case.

[0051] Fig.11 It is a structural diagram of the first core processing module of this case.

[0052] Fig.12 It is a structural diagram of the second core processing module of this case. DETAILED DESCRIPTION

[0053] The features of the present invention and other related features are further described in detail below through embodiments to facilitate understanding by those skilled in the art:

[0054] Embodiment 1

[0055] like Figure 1 As shown, a control system of a free screen includes a transmitting end 100 and a receiving display end 200, wherein the transmitting end 100 is provided with:

[0056] The TV broadcast signal input module 11 is used to receive and process DVB-T2 and DVB-S2 signals into baseband signals / intermediate frequency signals, and perform demodulation and forward error correction processing;

[0057] A graphics and audio processing module 12, used for converting the processed television broadcast signal into an LVDS signal and an audio signal;

[0058] A converter 13, used for converting the LVDS signal and the audio signal into an HDMI signal;

[0059] The first core processing module 14 is used to receive the HDM I signal output by the converter 13 and send it to the receiving display terminal 200 through the first communication module 15;

[0060] The power module 16 is used to supply power to the transmitting end 100 .

[0061] The converter 13 includes an audio input unit 131, an LVDS input unit 132, a first signal processing unit 133 for converting an audio signal and an LVDS signal into an HDMI signal, and an HDMI signal output unit 134 for receiving and outputting the HDMI signal.

[0062] As described above, the system of this case is equipped with a TV broadcast signal input module 11, which can receive and process two common TV broadcast signals, DVB-T2 and DVB-S2, convert them into baseband signals, and perform demodulation and forward error correction processing, so as to expand the signal receiving range and application scenarios of the system. The processed TV broadcast signal is converted into LVDS signal and audio signal respectively through the graphic audio processing module 12, and then converted into HDMI signal uniformly through the converter 13, so that the system of this case has a more detailed division in the signal processing process, which not only improves the efficiency of signal processing, but also ensures the stability and improvement of signal quality. The setting of the converter 13 enables the system to not only have the ability to convert LVDS signal into HDMI signal, but also supports the conversion of audio signal, so as to be able to completely output HDMI signal containing video and audio information, providing users with a richer audio-visual experience. The setting of the first core processing module 14 and the first communication module 15 realizes the centralized management of receiving, processing and sending HDMI signal, so as to improve the flexibility and scalability of the system, and also provides the possibility of seamless connection with other devices. The power module 16 is provided to provide stable and reliable power support for the transmitting end 100 .

[0063] like Figure 1 As shown, the receiving display terminal 200 is provided with:

[0064] The second communication module 21 is used to receive the HDMI signal and the control signal transmitted from the first communication module 15 in the transmitting end 100;

[0065] The second core processing module 22 is used to decode the received HDMI signal and extract the audio signal and the video signal respectively;

[0066] The power amplifier module 23 is used to receive the audio signal output by the second core processing module 22 and perform amplification processing;

[0067] The display screen 24 is used to receive and display the LVDS signal output by the second core processing module 22. The second communication module 21 and the first communication module 15 are both common Wi F i modules; the power amplifier module 23 and the display screen 24 are common settings and are not described here one by one. In specific implementation, the receiving display terminal 200 is also provided with a power supply module. The first communication module 15 interacts with the second communication module 21. At the same time, the second communication module 21 of the receiving display terminal 200 can also send a corresponding control signal to the first communication module 15 of the transmitting terminal 100.

[0068] As described above, the second communication module 21 is set up to stably receive the HDMI signal from the transmitting end 100, ensuring the integrity and accuracy of the signal during the transmission process, and providing a basis for subsequent decoding and display. The second core processing module 22 is set up to accurately decode the received HDMI signal and separate the audio signal and the LVDS signal, which not only improves the efficiency of signal processing, but also ensures the independent processing of the audio and video signals, thereby improving the overall sound quality and picture quality. The power amplifier module 23 amplifies the audio signal output by the second core processing module 22, making the audio output clearer and louder. The display screen 24 can receive the LVDS signal output by the second core processing module 22 and display it with high quality. As a low voltage differential signal, the LVDS signal has the advantages of fast transmission speed and strong anti-interference ability, and can ensure that the display screen presents a clear and delicate picture. This design provides users with a more realistic and vivid visual experience. At the same time, due to the ability to process LVDS signals, the receiving display end 200 also has high flexibility when connected to other devices that support LVDS signals.

[0069] like Figures 3 to 7 As shown, the television broadcast signal input module 11 includes: a first receiving and processing module 111 for receiving and processing a DVB-T2 signal into a baseband signal, a second receiving and processing module 112 for receiving and processing a DVB-S2 signal into a baseband signal, and a third receiving and processing module 113 for demodulating and performing forward error correction on the baseband signal received and processed by the first receiving and processing module 111 and the second receiving and processing module 112.

[0070] like Figure 2 As shown, the first receiving processing module 111 is a tuner chip circuit using a chip model of ATBM253; specifically, it includes a chip main circuit part 1111, a voltage management circuit part 1112, an I2C interface filter circuit part 1113 for signal filtering and denoising on the I2C bus, a tuner filter circuit part 1114 for filtering the two frequencies of 24MHz and 144MHz, a signal conversion part 1115 and a crystal oscillator circuit part 1116.

[0071] like Figure 3 As shown, the second receiving and processing module 112 is a digital satellite receiving chip circuit using a chip model RDA5815M;

[0072] like Figure 4As shown, the third receiving processing module 113 includes a demodulation and decoding chip UDM1 and its peripheral circuits. The demodulation and decoding chip UDM1 is provided with: a demodulator input pin DEMOD_XI N, a demodulator output pin DEMOD_XOUT, a first automatic gain control pin AGC_T, a second automatic gain control pin AGC_S, a reset pin TCON0 / DEMOD_RSTN and a plurality of data transmission pins for transmitting serial transport stream TS data, thereby forming a data transmission pin part 1130. Specifically, the serial transport stream TS data is the digital video and audio information output from the demodulator and sent to the graphics and audio processing module. The chip model used is Hi 3138V200 chip, which is similar to the Hi 3130V200 chip.

[0073] As described above, the first receiving processing module 111 adopts the ATBM253 tuner chip circuit, which integrates multiple key functions such as chip main circuit, voltage management, I2C interface filtering, tuner filtering, signal conversion and crystal oscillator circuit, and realizes high integration. The second receiving processing module 112 uses the setting of the RDA5815M digital satellite receiving chip circuit, so that the second receiving processing module 112 has functions such as variable gain LNA low noise amplifier, orthogonal down converter, variable intermediate frequency gain amplifier, variable low pass filter, reference oscillator, VCO voltage controlled oscillator, synthesizer and output baseband amplifier, so as to automatically adjust the gain according to the signal strength, and remove noise and interference through precise filtering, so as to ensure the purity and accuracy of the signal. Among them, the first receiving processing module includes an I 2C interface filtering circuit and a tuner filtering circuit, which are respectively used for signal filtering and denoising on the I 2C bus, and filtering the two frequencies of 24MHz and 144MHz, which helps to improve the signal quality and ensure the accuracy and stability of data transmission. The demodulation and decoding chip UDM1 in the third receiving and processing module is provided with a first automatic gain control pin AGC_T and a second automatic gain control pin AGC_S, so as to automatically adjust the gain according to the strength of the input signal, ensuring that the signal maintains an appropriate level during transmission, thereby improving the sensitivity and stability of signal reception. The third receiving and processing module transmits the serial transmission stream TS data through multiple data transmission pins. The serial transmission method helps to achieve high-speed and efficient data transmission while reducing system complexity.

[0074] like Figure 6 and Figure 7As shown, the graphic audio processing module 12 includes: a first power management unit 121, a first voltage conversion unit 122, a first memory unit 123, a first signal processing unit 124, and a first extension unit 125; the first power management unit 121 is responsible for the power supply and management of the entire graphic audio processing module; the first voltage conversion unit 122 is responsible for the power supply and management of the entire graphic audio processing module 12, and the first memory unit 123 is responsible for processing the data transmission and communication between the graphic audio processing module 12 and the memory; the first signal processing unit 124 is connected to the first memory unit 123 and the first extension unit 125 respectively; the first extension unit 125 is divided into a first function pin part 1251 for a standard interface of a digital TV receiver, a second function pin part 1252 for EMMC storage, and a third function pin part 1253 for a USB interface.

[0075] As described above, the video source receiving and processing module 13 adopts the chip model ADV7612, which can not only receive and decode high-definition video signals, but also has functions such as color space conversion, video scaling, image enhancement and noise reduction, so as to effectively improve the video quality, and can adapt to different display devices, and can be widely used in LCD TVs, monitors, audio and video interface converters and other multimedia applications, thereby improving the competitiveness of the sending card 1 or control system in this case. The first signal transmission protection circuit 134, the second signal transmission protection circuit 135 and the TVS array model RCLAMP7534P are set to ensure that extremely low clamping voltage positive and negative ESD pulses are provided to prevent sensitive circuits in electronic equipment from being affected by ESD. At the same time, by directly adopting the TVS array of RCLAMP7534P, there is no need to design other protection circuits, and the circuit structure is simple.

[0076] like Figure 8 As shown, the first signal processing unit 133 includes: a conversion chip U7 with a chip model of LT2611UXC and its peripheral circuits. In specific implementation, the converter 13 also includes a debugging interface circuit 135 and a third power management circuit 136. In this way, by using the LT2611UXC chip, the LVDS signal can be efficiently converted into an HDMI2.0 signal to meet the requirements of high-definition video transmission. By adding the debugging interface circuit 135, the debugging and testing process is more convenient, which helps to quickly locate and solve problems.

[0077] like Figures 9 to 11As shown, the transmitting end 100 is further provided with: a DDR storage module 17, an EMMC storage module 18, a USB module 19 and a gyroscope module 20 respectively connected to the first core processing module 14. The gyroscope module 20 adopts a motion sensor chip of model DA228EC. The DDR storage module 17, the EMMC storage module 18, and the USB module 19 are existing common modules and are not described one by one here.

[0078] As mentioned above, the DDR storage module is set up so that it can be used as an external memory interface to connect the CPU and other components to provide large-capacity, high-speed data storage and access capabilities; at the same time, it can provide a higher data transmission rate than the traditional static random access memory SRAM, thereby speeding up the speed of data access, improving the response speed and overall performance of the system. The EMMC storage module 18 is set up so that the system has high-speed data transmission capabilities and can provide stable and reliable data storage and access. The USB module 19 is set up to facilitate the connection of various external devices, such as storage devices, input devices, etc., so that users can exchange data and expand functions. The gyroscope module 20 is set up to provide accurate positioning, direction and posture information, and provide necessary data support for the motion control and navigation functions of the device. The gyroscope module 20 uses the DA228EC motion sensor chip because the DA228EC chip is made of advanced micromachining technology and single crystal silicon, and has excellent stability and reliability, so that the gyroscope module can maintain stable performance in various complex environments and provide reliable data support for users.

[0079] like Fig.11 and Fig.12 As shown, the first core processing module 14 includes:

[0080] A first data receiving unit 141, configured to receive an HDMI signal output by the converter 13;

[0081] The second signal processing unit 142 is used to decode and process the received HDMI signal;

[0082] The first data transmission unit 143 is used to send the processed data to the receiving display terminal 200 through the first communication module 15;

[0083] The first control unit 144 is used to coordinate and manage the work of the first data receiving unit 141 , the second signal processing unit 142 and the first data transmission unit 143 .

[0084] The second core processing module 22 includes:

[0085] The second data receiving unit 221 is used to receive the HDMI signal from the second communication module 21;

[0086] The third signal processing unit 222 is used to decode and process the received HDMI signal to extract the audio signal and the LVDS signal;

[0087] A second data transmission unit 223, used to transmit the processed audio signal and LVDS signal to the power amplifier module and the display screen respectively;

[0088] The second control unit 224 is used to coordinate and manage the work of the second data receiving unit 221 , the third signal processing unit 222 and the second data transmission unit 223 .

[0089] As described above, the first data receiving unit 141 of the first core processing module 14 of this case is set up so as to receive the HDMI signal output by the converter 13, ensure the accurate reception and transmission of the signal, improve the efficiency and stability of signal reception, and reduce the possibility of signal loss or error. The second signal processing unit 142 is set up so that the system can support HDMI signal input in multiple formats and output the processed high-quality data. The first data transmission unit 143 sends the processed data to the receiving display terminal 200 through the first communication module 15, ensuring the reliability and stability of data transmission. The second data receiving unit 221 of the second core processing module 22 is set up so as to receive the HDMI signal from the second communication module, which enables the system to support the input of multiple signal sources. The third signal processing unit 222 is set up so as to not only decode the video and audio data in the HDMI signal, but also extract the LVDS signal, which is a signal format specifically used for display screen driving, further enabling the system to support the connection of multiple display devices and audio devices, and output high-quality video and audio signals.

[0090] In summary, through a series of innovations and improvements, the system in this case has achieved comprehensive reception and processing of TV broadcast signals, perfect conversion of HDMI signals, integration of core processing and communication modules, and independent configuration of power modules. These improvements have jointly improved the overall performance of the system and provided users with a better and more convenient audio-visual experience.

[0091] As mentioned above, this case protects a control system of a free-form screen, and all technical solutions that are the same or similar to this case should be deemed to fall within the protection scope of this case.

Claims

1. A control system for a free screen, characterized in that: The invention comprises a transmitting end (100) and a receiving display end (200), wherein the transmitting end (100) is provided with: A television broadcast signal input module (11) is used to receive DVB-T2 and DVB-S2 signals and process them into baseband signals, as well as perform demodulation and forward error correction processing; A graphics and audio processing module (12), used for converting the processed television broadcast signal into an LVDS signal and an audio signal; A converter (13), used for converting LVDS signals and audio signals into HDMI signals; A first core processing module (14) is used to receive the HDMI signal output by the converter (13) and send it to the receiving display end (200) through the first communication module (15); a power supply module (16) is used to supply power to the sending end (100); The converter (13) includes an audio input unit (131), an LVDS input unit (132), a first signal processing unit (133) for converting an audio signal and an LVDS signal into an HDMI signal, and an HDMI signal output unit (134) for receiving and outputting the HDMI signal.

2. The control system of the free screen according to claim 1 is characterized in that: The receiving and displaying end (200) is provided with: A second communication module (21) is used to receive HDMI signals and control signals transmitted from the first communication module (15) in the transmitting end (100); The second core processing module (22) is used to decode the received HDMI signal and extract the audio signal and the LVDS signal respectively; A power amplifier module (23), used for receiving the audio signal output by the second core processing module (22) and performing amplification processing; A display screen (24) is used to receive and display the LVDS signal output by the second core processing module (22); wherein the first communication module (15) interacts with the second communication module (21).

3. The control system of the free screen according to claim 1 is characterized in that: The television broadcast signal input module (11) comprises: a first receiving and processing module (111) for receiving and processing a DVB-T2 signal into a baseband signal, a second receiving and processing module (112) for receiving and processing a DVB-S2 signal into a baseband signal, and a third receiving and processing module (113) for demodulating and performing forward error correction on the baseband signal received and processed by the first receiving and processing module (111) and the second receiving and processing module (112).

4. The control system of the free screen according to claim 3 is characterized in that: The first receiving and processing module (111) is a tuner chip circuit using a chip model ATBM253; the second receiving and processing module (112) is a digital satellite receiving chip circuit using a chip model RDA5815M; the third receiving and processing module (113) comprises a demodulation and decoding chip UDM1 and its peripheral circuits, wherein the demodulation and decoding chip UDM1 is provided with: a demodulator input pin DEMOD_XIN, a demodulator output pin DEMOD_XOUT, a first automatic gain control pin AGC_T, a second automatic gain control pin AGC_S, a reset pin TCON0 / DEMOD_RSTN and a plurality of data transmission pins for transmitting serial transmission stream data.

5. The control system of the free screen according to claim 1 is characterized in that: The graphic audio processing module (12) comprises: a first power management unit (121), a first voltage conversion unit (122), a first memory unit (123), a fourth signal processing unit (124), and a first expansion unit (125); the first power management unit (121) is responsible for power supply and management of the entire graphic audio processing module; the first voltage conversion unit (122) is responsible for power supply and management of the entire graphic audio processing module (12); the first memory unit (123) is responsible for processing data transmission and communication between the graphic audio processing module (12) and the memory; the fourth signal processing unit (124) is connected to the first memory unit (123) and the first expansion unit (125) respectively; the first expansion unit (125) is divided into a first functional pin portion (1251) used as a standard interface of a digital television receiver, a second functional pin portion (1252) used for EMMC storage, and a third functional pin portion (1253) used as a USB interface.

6. The control system of the free screen according to claim 1, characterized in that: The first signal processing unit (133) comprises: a conversion chip U7 with a chip model of LT2611 UXC and its peripheral circuits.

7. The control system of the free screen according to claim 1, characterized in that: The transmitting end (100) is further provided with: a DDR storage module (17), an EMMC storage module (18), a USB module (19) and a gyroscope module (20) which are respectively connected to the first core processing module (14).

8. The control system of the free screen according to claim 7, characterized in that: The gyroscope module (20) adopts a motion sensor chip of model DA228EC.

9. The control system of the free screen according to claim 1, characterized in that: The first core processing module (14) comprises: A first data receiving unit (141), used for receiving an HDMI signal output by the converter (13); A second signal processing unit (142), configured to decode and process the received HDMI signal; A first data transmission unit (143), used for sending the processed data to a receiving display terminal (200) via a first communication module (15); The first control unit (144) is used to coordinate and manage the work of the first data receiving unit (141), the second signal processing unit (142) and the first data transmission unit (143).

10. The control system of the free screen according to claim 2, characterized in that: The second core processing module (22) comprises: A second data receiving unit (221), used for receiving an HDMI signal from a second communication module (21); A third signal processing unit (222) is used to decode and process the received HDMI signal to extract an audio signal and a LVDS signal; A second data transmission unit (223) is used to transmit the processed audio signal and LVDS signal to the power amplifier module and the display screen respectively; The second control unit (224) is used to coordinate and manage the work of the second data receiving unit (221), the third signal processing unit (222) and the second data transmission unit (223).

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