A multi-channel broadcast and television signal monitoring system based on SOC integration

Abstract

The utility model relates to the technical field of radio and television signal monitoring, and specifically, to a multi-channel radio and television signal monitoring system based on SOC integration, including: an SOC control circuit, multiple digital demodulation circuits and multiple FM / AM demodulation circuits; wherein the multiple digital demodulation circuits and multiple FM / AM demodulation circuits are electrically connected to the SOC control circuit respectively. The utility model integrates multiple digital demodulation circuits and multiple FM / AM demodulation circuits with the SOC control circuit, and realizes efficient coordination between various modules through close electrical connection, which not only simplifies the system structure, reduces the size of the equipment, and reduces power consumption, but also improves the anti-interference ability of the system through integrated design, and enhances stability and reliability.

Description

Technical Field

[0001] The utility model relates to the technical field of broadcasting and television signal monitoring, in particular to a SOC-based integrated multi-channel broadcasting and television signal monitoring system. Background Art

[0002] Radio and television signal monitoring plays a vital role in the operation and maintenance of radio and television networks. With the continuous development of radio and television technology, the types of signals are increasing and the formats are becoming more complex. Traditional radio and television signal monitoring systems face many challenges. For example, the system lacks effective recognition and processing capabilities for diverse signal formats, resulting in limited monitoring coverage. The discrete system design leads to poor stability and reliability, weak anti-interference ability, and is difficult to adapt to the development needs of modern radio and television networks. Based on this, in response to the above problems, we designed a multi-channel radio and television signal monitoring system based on SOC integration. Utility Model Content

[0003] The purpose of the utility model is to provide a multi-channel radio and television signal monitoring system based on SOC integration, which integrates multiple digital demodulation circuits and multiple FM / AM demodulation circuits with the SOC control circuit, and realizes efficient coordination between various modules through close electrical connection, which not only simplifies the system structure, reduces the equipment size, and reduces power consumption, but also the integrated design improves the system's anti-interference ability and enhances stability and reliability.

[0004] The embodiments of the present invention are implemented by the following technical solutions:

[0005] A multi-channel broadcast and television signal monitoring system based on SOC integration includes: a SOC control circuit, multiple digital demodulation circuits and multiple FM / AM demodulation circuits; wherein the multiple digital demodulation circuits and multiple FM / AM demodulation circuits are electrically connected to the SOC control circuit respectively.

[0006] Optionally, the digital demodulation circuit includes: a filter, an amplifier, an analog-to-digital converter and a digital signal processor connected in sequence; wherein the filter is used to filter noise in the radio and television signal, the amplifier is used to amplify the filtered radio and television signal, the analog-to-digital converter is used to convert the amplified radio and television signal from an analog signal to a digital signal, the digital signal processor is used to demodulate and decode the digitized radio and television signal, and the digital signal processor is electrically connected to the SOC control circuit.

[0007] Optionally, the digital demodulation circuit also includes: a clock recovery circuit; the clock recovery circuit is electrically connected to the digital signal processor and the SOC control circuit respectively, and the clock recovery circuit is used to extract clock information from the broadcasting and television signal processed by the digital signal processor.

[0008] Optionally, the clock recovery circuit includes: a phase detector, a loop filter and a voltage-controlled oscillator; the phase detector is used to compare the phase difference between the broadcast television signal processed by the digital signal processor and the output of the voltage-controlled oscillator to generate an error signal, the loop filter is used to filter out the high-frequency noise output by the phase detector, and the voltage-controlled oscillator is used to adjust the oscillation frequency according to the output voltage of the loop filter to generate a synchronous clock signal; the digital signal processor is connected to an input terminal 1 of the phase detector, the output terminal of the voltage-controlled oscillator is connected to an input terminal 2 of the phase detector, the output terminal of the phase detector is connected to the input terminal of the loop filter, and the output terminal of the loop filter is connected to the input terminal of the voltage-controlled oscillator.

[0009] Optionally, the digital demodulation circuit also includes: an error correction circuit; the error correction circuit is electrically connected to the digital signal processor and the SOC control circuit respectively, and the error correction circuit is used to detect and correct errors in the broadcasting and television signals processed by the digital signal processor.

[0010] Optionally, the error correction circuit includes: an encoder and a decoder connected in sequence; the encoder is connected to the digital signal processor, and the decoder is connected to the SOC control circuit, the encoder is used to encode the radio and television signal processed by the digital signal processor, and the decoder is used to decode, detect errors and correct the radio and television signal processed by the digital signal processor.

[0011] Optionally, the FM / AM demodulation circuit includes: an antenna, a radio frequency amplifier, a mixer, a local oscillator, an intermediate frequency amplifier, an FM demodulator, an AM demodulator and an audio amplifier; the antenna is connected to the radio frequency amplifier, the radio frequency amplifier and the local oscillator are respectively connected to the mixer, the mixer is connected to the intermediate frequency amplifier, the intermediate frequency amplifier is respectively connected to the FM demodulator and the AM demodulator, the FM demodulator and the AM demodulator are respectively connected to the audio amplifier, and the audio amplifier is connected to the SOC control circuit.

[0012] The technical solution of the embodiment of the utility model has at least the following advantages and beneficial effects:

[0013] The utility model integrates multiple digital demodulation circuits and multiple FM / AM demodulation circuits with a SOC control circuit, and realizes efficient coordination between various modules through close electrical connection, which not only simplifies the system structure, reduces the size of the equipment, and reduces power consumption, but also improves the anti-interference ability of the system through the integrated design, and enhances stability and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1A schematic diagram of the principle of a multi-channel broadcast and television signal monitoring system based on SOC integration provided by the utility model;

[0015] Figure 2 This is a specific implementation example diagram of the SOC control circuit provided by the utility model. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0017] like Figure 1 As shown, the utility model provides one of the embodiments: a multi-channel radio and television signal monitoring system based on SOC integration, including: a SOC control circuit, a 6-channel digital demodulation circuit and a 6-channel FM / AM demodulation circuit; wherein the 6-channel digital demodulation circuit and the 6-channel FM / AM demodulation circuit are electrically connected to the SOC control circuit respectively.

[0018] In this embodiment, the digital demodulation circuit includes: a filter, an amplifier, an analog-to-digital converter and a digital signal processor connected in sequence; wherein the filter is used to filter noise in the radio and television signal, the amplifier is used to amplify the filtered radio and television signal, the analog-to-digital converter is used to convert the amplified radio and television signal from an analog signal to a digital signal, the digital signal processor is used to demodulate and decode the digitized radio and television signal, and the digital signal processor is electrically connected to the SOC control circuit.

[0019] During implementation, radio and television signals are received through an antenna and filtered out of noise and interference. The filtered signal is amplified by an amplifier to a suitable amplitude for subsequent circuit processing. The amplified analog signal is converted into a digital signal by an ADC for digital processing. The DSP (digital signal processor) demodulates and decodes the digitized signal to extract useful information such as audio and video. The clock recovery circuit extracts clock information from the received signal to ensure the synchronization of data transmission. The error correction circuit detects and corrects errors that may occur during data transmission to improve the reliability of data transmission.

[0020] Furthermore, the digital demodulation circuit also includes: a clock recovery circuit; the clock recovery circuit is electrically connected to the digital signal processor and the SOC control circuit respectively, and the clock recovery circuit is used to extract clock information from the broadcast and television signal processed by the digital signal processor.

[0021] The clock recovery circuit comprises: a phase detector, a loop filter and a voltage-controlled oscillator; the phase detector is used to compare the phase difference between the broadcast television signal processed by the digital signal processor and the output of the voltage-controlled oscillator to generate an error signal; the loop filter is used to filter out the high-frequency noise output by the phase detector; the voltage-controlled oscillator is used to adjust the oscillation frequency according to the output voltage of the loop filter to generate a synchronous clock signal; the digital signal processor is connected to the first input terminal of the phase detector, the output terminal of the voltage-controlled oscillator is connected to the second input terminal of the phase detector, the output terminal of the phase detector is connected to the input terminal of the loop filter, and the output terminal of the loop filter is connected to the input terminal of the voltage-controlled oscillator.

[0022] During implementation, the broadcast and television signal processed by the digital signal processor contains clock information, but there may be jitter and noise. Therefore, the phase difference between the input signal and the output of the voltage-controlled oscillator is compared through a phase detector to generate an error signal. The error signal is filtered out through a loop filter to remove high-frequency noise and stabilize the loop. The filtered error signal controls the frequency of the voltage-controlled oscillator so that its output is synchronized with the clock of the input signal. The output of the voltage-controlled oscillator is the recovered clock signal, which is used for synchronous data transmission.

[0023] Furthermore, the digital demodulation circuit also includes: an error correction circuit; the error correction circuit is electrically connected to the digital signal processor and the SOC control circuit respectively, and the error correction circuit is used to detect and correct errors in the broadcast television signal processed by the digital signal processor.

[0024] The error correction circuit includes: an encoder and a decoder connected in sequence; the encoder is connected to the digital signal processor, and the decoder is connected to the SOC control circuit. The encoder is used to encode the radio and television signals processed by the digital signal processor, and the decoder is used to decode, detect errors and correct the radio and television signals processed by the digital signal processor.

[0025] During implementation, the encoder at the transmitting end encodes and adds redundant information to the radio and television signal processed by the digital signal processor, and the decoder at the receiving end detects and corrects errors in the received data according to the preset encoder encoding rules and the added redundant information. It can be understood that the encoder and decoder here can be executed according to the preset functions, or they can be manually intervened by the management personnel. The encoding here can adopt Hamming code, BCH code, RS code, etc., without specific limitation. The error correction circuit designed by this embodiment can improve the reliability of radio and television signal transmission and reduce the impact of errors on data integrity.

[0026] In this embodiment, the FM / AM demodulation circuit includes: an antenna, a radio frequency amplifier, a mixer, a local oscillator, an intermediate frequency amplifier, an FM demodulator, an AM demodulator and an audio amplifier; the antenna is connected to the radio frequency amplifier, the radio frequency amplifier and the local oscillator are respectively connected to the mixer, the mixer is connected to the intermediate frequency amplifier, the intermediate frequency amplifier is respectively connected to the FM demodulator and the AM demodulator, the FM demodulator and the AM demodulator are respectively connected to the audio amplifier, and the audio amplifier is connected to the SOC control circuit.

[0027] During implementation, the radio and television signals received by the antenna include FM and AM radio frequency signals. The radio frequency amplifier amplifies the received weak radio frequency signal to a suitable amplitude for subsequent circuit processing. At the same time, the local oscillator generates a local oscillation signal with a frequency close to the radio frequency signal. The mixer mixes the radio frequency signal with the local oscillation signal to generate two new frequencies: one is the sum of the two frequencies, and the other is the difference between the two frequencies, namely the intermediate frequency, which is lower than the radio frequency and is easy to amplify and process. The intermediate frequency amplifier amplifies the intermediate frequency signal output by the mixer to a suitable amplitude. The FM demodulator and the AM demodulator demodulate the FM signal and the AM signal respectively. The FM demodulator used in this embodiment is a discriminator, and the AM demodulator uses an envelope detector. The demodulated audio signal is amplified by the audio amplifier, and then the speaker or other audio equipment is driven by the SOC to restore the sound of the radio and television program.

[0028] Specifically, Figure 2As shown, the SOC control circuit used in this embodiment is specifically: Zynq7020 series, core board CPU model XC7Z020-2CLG400 I, CLG400 package, operating temperature range of -40℃~100℃, number of pins is 400, size is 17mm*17mm. The SOC control circuit is connected to the industrial-grade SPINORFLASH through the QSPI0 (CS0) bus on the PS end; the SOC control circuit is connected to the industrial-grade eMMC through the SDIO1 bus on the PS end, using a 4-bit data line; the SOC control circuit is connected to 2 industrial-grade DDR3 through the DDR bus on the PS end, each using a 16-bit data line, a total of 32 bits; the SOC control circuit uses 2 industrial-grade crystal oscillator clock frequencies of 33.33MHz and 24MHz; the 8-bit parallel data interface USB0ULPI on the PS end of the SOC control circuit is connected through the PHY chip Converted into USB high-speed transceiver bus; SOC control circuit monitors power supply power (voltage, current) through I2C bus, and uses 1NA220AIDGS for power consumption monitoring; SOC control circuit mounts an EEPROM through I2C bus to store board information (factory information, board hardware parameters, etc.), and is designed using AT24C02 chip; SOC control circuit is equipped with 32.768kHz passive clock and button battery to provide clock information for Zynq system; SOC control circuit monitors board temperature through I2C interface; SOC control circuit communicates with WI FI module through USB interface, the module is stable and mature with low power consumption; SOC control circuit communicates with Bluetooth module through serial port interface.

[0029] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A multi-channel broadcast and television signal monitoring system based on SOC integration, characterized in that: include: SOC control circuit, multiple digital demodulation circuits and multiple FM / AM demodulation circuits; wherein the multiple digital demodulation circuits and multiple FM / AM demodulation circuits are electrically connected to the SOC control circuit respectively.

2. The SOC-based integrated multi-channel broadcast and television signal monitoring system according to claim 1 is characterized in that: The digital demodulation circuit includes: a filter, an amplifier, an analog-to-digital converter and a digital signal processor connected in sequence; wherein the filter is used to filter noise in the radio and television signal, the amplifier is used to amplify the filtered radio and television signal, the analog-to-digital converter is used to convert the amplified radio and television signal from an analog signal to a digital signal, the digital signal processor is used to demodulate and decode the digitized radio and television signal, and the digital signal processor is electrically connected to the SOC control circuit.

3. The SOC-based integrated multi-channel broadcast and television signal monitoring system according to claim 2 is characterized in that: The digital demodulation circuit also includes: a clock recovery circuit; the clock recovery circuit is electrically connected to the digital signal processor and the SOC control circuit respectively, and the clock recovery circuit is used to extract clock information from the broadcast television signal processed by the digital signal processor.

4. The SOC-based integrated multi-channel broadcast and television signal monitoring system according to claim 3 is characterized in that: The clock recovery circuit comprises: a phase detector, a loop filter and a voltage-controlled oscillator; the phase detector is used to compare the phase difference between the broadcast television signal processed by the digital signal processor and the output of the voltage-controlled oscillator to generate an error signal; the loop filter is used to filter out the high-frequency noise output by the phase detector; the voltage-controlled oscillator is used to adjust the oscillation frequency according to the output voltage of the loop filter to generate a synchronous clock signal; the digital signal processor is connected to the first input terminal of the phase detector, the output terminal of the voltage-controlled oscillator is connected to the second input terminal of the phase detector, the output terminal of the phase detector is connected to the input terminal of the loop filter, and the output terminal of the loop filter is connected to the input terminal of the voltage-controlled oscillator.

5. The SOC-based integrated multi-channel broadcast and television signal monitoring system according to claim 4 is characterized in that: The digital demodulation circuit also includes: an error correction circuit; the error correction circuit is electrically connected to the digital signal processor and the SOC control circuit respectively, and the error correction circuit is used to detect and correct errors in the broadcast television signal processed by the digital signal processor.

6. The SOC-based integrated multi-channel broadcast and television signal monitoring system according to claim 5 is characterized in that: The error correction circuit includes: an encoder and a decoder connected in sequence; the encoder is connected to the digital signal processor, and the decoder is connected to the SOC control circuit. The encoder is used to encode the radio and television signals processed by the digital signal processor, and the decoder is used to decode, detect errors and correct the radio and television signals processed by the digital signal processor.

7. The SOC-based integrated multi-channel broadcast and television signal monitoring system according to any one of claims 1 to 6, characterized in that: The FM / AM demodulation circuit includes: an antenna, a radio frequency amplifier, a mixer, a local oscillator, an intermediate frequency amplifier, an FM demodulator, an AM demodulator and an audio amplifier; the antenna is connected to the radio frequency amplifier, the radio frequency amplifier and the local oscillator are respectively connected to the mixer, the mixer is connected to the intermediate frequency amplifier, the intermediate frequency amplifier is respectively connected to the FM demodulator and the AM demodulator, the FM demodulator and the AM demodulator are respectively connected to the audio amplifier, and the audio amplifier is connected to the SOC control circuit.

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