Multi-channel multi-mode broadcast receiving device
By using a multi-channel, multi-mode broadcast receiver, the problems of complex design and inconvenient signal switching in vehicle-mounted DAB products have been solved, achieving seamless switching and full-area coverage of DAB signals, reducing design difficulty and certification costs, and improving user experience.
Patent Information
- Application Number
- CN202511294518.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-11
- Publication Date
- 2026-01-06
AI Technical Summary
Existing automotive DAB products are complex in design, making it difficult to meet EMC requirements, increasing design difficulty and certification costs, and providing a poor user experience when the DAB signal is weak, and failing to achieve multi-channel and seamless switching.
The broadcast receiver is a multi-channel, multi-mode device, including a microcontroller unit, a storage unit, a signal processing unit, and a power supply unit. It achieves seamless switching between DAB and FM signals through a dual-channel receiver chip and a signal demodulation unit, supports multi-channel and digital audio broadcasting standards from different regions, and uses the microcontroller unit for mode control and signal strength comparison.
It achieves seamless switching of DAB signals and full-area broadcast coverage, reducing design complexity and certification costs, and improving user experience.
Smart Images
Figure CN121283548A_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of digital broadcasting technology, and more specifically to a multi-channel, multi-mode broadcast receiving device. Background Technology
[0002] With the increasing export sales of new energy vehicles, most exported vehicles are required to have DAB (Digital Audio Broadcasting) functionality. DAB products on the market are divided into integrated and separate types. Currently, some in-vehicle DAB products use the printed circuit board (PCB) inside the vehicle's infotainment system controller, requiring PCB resources for DAB circuitry. Besides meeting the vehicle manufacturer's EMC (Electromagnetic Compatibility) requirements, the entire controller needs to pass many additional DAB tests and certifications, as well as various national regulations, indirectly increasing the design complexity and difficulty. Therefore, integrated designs are not the mainstream choice. A separate approach involves developing a separate DAB module, which connects to the vehicle's infotainment system via USB (Universal Serial Bus). The vehicle's infotainment system integrates the DAB APK (Android Package), enabling DAB functionality. The DAB module passes all certifications and regulations independently, reducing product design difficulty, testing and certification costs, and shortening the product development cycle.
[0003] Many products on the market are single-channel DAB products, which provide a very poor experience when the DAB signal is weak. They do not support seamless switching between multiple DAB signals, nor do they support seamless switching in areas covered only by FM signals. Summary of the Invention
[0004] In view of the above problems, this disclosure provides a multi-channel, multi-mode broadcast receiving device, comprising: a microcontroller unit connected to a storage unit via a bus, and connected to an in-vehicle integrated information processing system and a signal processing unit; a storage unit connected to the microcontroller unit via a bus and connected to the signal processing unit, for storing the startup code and preset chip configuration parameters of the signal processing unit for transmission to the microcontroller unit via the bus; a signal processing unit including a dual-channel receiving chip and a signal demodulation unit, connected to an antenna, and connected to the storage unit and the microcontroller unit, for converting the antenna's radio frequency signal into an audio signal for transmission to the microcontroller unit via FM broadcast mode or digital audio broadcast mode according to the control instructions of the microcontroller unit; and a power supply device, with an input power supply and an output power supply connected to the microcontroller unit, the signal processing unit, and the storage unit, for converting the input power supply into the operating voltage required by the device.
[0005] In the embodiments of this disclosure, a dual-channel receiver chip, connected to an antenna, a microcontroller unit, a storage unit, and a signal demodulation unit, is used to convert the antenna's radio frequency signal into an audio signal; and to send the status parameters of the radio frequency signal strength of the digital audio broadcast to the microcontroller unit so that the microcontroller unit can issue control commands to control the operating mode; the signal demodulation unit, connected to the microcontroller unit, the storage unit, and the dual-channel receiver chip, is used to demodulate the audio signal for transmission to the microcontroller unit; wherein, the dual-channel receiver chip integrates an FM broadcast receiver and a digital audio broadcast tuner; the operating mode includes at least one of an FM broadcast mode and a digital audio broadcast mode.
[0006] In embodiments of this disclosure, an FM broadcast receiver is used to convert the FM broadcast radio frequency signal into a digital audio I2S signal; and a digital audio broadcast tuner is used to convert the digital audio broadcast radio frequency signal into a digital I / Q intermediate frequency audio signal.
[0007] In embodiments of this disclosure, the FM broadcast mode is configured such that the FM broadcast receiver and the digital audio broadcast tuner operate simultaneously.
[0008] In embodiments of this disclosure, the signal demodulation unit is further configured to align the audio signal output from the FM broadcast receiver and the audio signal output from the digital audio broadcast tuner to obtain an output audio signal.
[0009] In embodiments of this disclosure, the digital audio broadcast mode is configured to operate at least two digital audio broadcast tuners simultaneously; the at least two digital audio broadcast tuners are respectively configured to digital audio broadcast standards of different regions.
[0010] In embodiments of this disclosure, the signal demodulation unit is further configured to compare the strengths of audio signals output from at least two digital audio broadcast tuners so as to use the higher-strength audio signal as the output audio signal.
[0011] In embodiments of this disclosure, the microcontroller unit is connected to the vehicle integrated information processing system via a universal serial bus.
[0012] In embodiments of this disclosure, the power supply device includes a first low-dropout linear regulator and a second low-dropout linear regulator. The first low-dropout linear regulator has its input connected to a power supply and its output connected to the second low-dropout linear regulator, a microcontroller unit, a universal serial bus, a signal demodulation unit, and a storage unit, for powering the first module of the second low-dropout linear regulator, the microcontroller unit, the universal serial bus, the signal demodulation unit, and the storage unit. The second low-dropout linear regulator has its output connected to a dual-channel receiver chip and a signal demodulation unit, for powering the second module of the dual-channel receiver chip and the signal demodulation unit.
[0013] In embodiments of this disclosure, a microcontroller unit is configured to receive and process information from an in-vehicle integrated information processing system; send control commands to a signal processing unit to control the operating mode based on a status signal transmitted by the signal processing unit; and send audio signals transmitted by the signal processing unit to the in-vehicle integrated information processing system; the operating mode includes at least one of an FM broadcast mode and a digital audio mode.
[0014] According to the multi-channel, multi-mode broadcast receiving device provided in this disclosure, the seamless switching between digital audio broadcasting (DAB) signals and frequency modulation (FM) broadcasting at least partially solves the technical problem of not being able to receive radio frequency signals when the DAB signal is weak, and achieves the technical effect of full-area broadcast coverage. Attached Figure Description
[0015] Figure 1 A schematic block diagram of a multi-channel, multi-mode broadcast receiving apparatus according to an embodiment of the present disclosure is shown.
[0016] Figure 2 The mounting surface of a broadcast receiving device according to an embodiment of the present disclosure is schematically shown;
[0017] Figure 3 A top view of a broadcast receiving apparatus according to an embodiment of the present disclosure is shown schematically;
[0018] Figure 4 The USB interface of the broadcast receiving device according to an embodiment of the present disclosure is schematically shown.
[0019] Figure 5 The diagram schematically illustrates the DAB / FM antenna interface of a broadcast receiving apparatus according to an embodiment of the present disclosure. Detailed Implementation
[0020] The embodiments of the present disclosure will now be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the disclosure. In the following detailed description, numerous specific details are set forth to provide a thorough understanding of the embodiments of the present disclosure for ease of explanation. However, it will be apparent that one or more embodiments may be practiced without these specific details. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concepts of the present disclosure.
[0021] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this disclosure. The terms “comprising,” “including,” etc., as used herein indicate the presence of the stated features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.
[0022] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein are to be interpreted in a manner consistent with the context of this specification, and not in an idealized or overly rigid way.
[0023] When using expressions such as "at least one of A, B and C", they should generally be interpreted in accordance with the meaning that is commonly understood by those skilled in the art (e.g., "a system having at least one of A, B and C" should include, but is not limited to, a system having A alone, a system having B alone, a system having C alone, a system having A and B, a system having A and C, a system having B and C, and / or a system having A, B and C, etc.).
[0024] First, the technical terms used in this article are explained as follows:
[0025] DAB is an abbreviation for Digital Audio Boardcasting. It is the third generation of broadcasting technology after AM and FM broadcasting, and a completely new digital broadcasting system. A digital radio assembly is required to achieve DAB digital broadcasting functionality (it must meet the ETSI EN 300 401 Radio Broadcasting Systems / ETSI EN303 345-4 Broadcast Sound Receivers standards, frequency band Brand III 174-240 MHz).
[0026] Figure 1 This schematically illustrates a structural block diagram of a multi-channel, multi-mode broadcast receiving device according to an embodiment of the present disclosure. The embodiment of the present disclosure provides a multi-channel, multi-mode broadcast receiving device, including: a microcontroller unit (MCU), connected to a storage unit via a bus, and connected to an in-vehicle integrated information processing system (IVI) and a signal processing unit; a storage unit (Flash), connected to the MCU via a bus and connected to the signal processing unit, for storing the startup code and preset chip configuration parameters of the signal processing unit for transmission to the MCU via the bus; a signal processing unit, including a dual-channel receiver chip (FM+DAB 2 Tunner) and a signal demodulation unit, connected to an antenna (ANT), and connected to the storage unit and the MCU, for converting the antenna's radio frequency signal into an audio signal for transmission to the MCU via FM broadcast mode or digital audio broadcast mode according to the control instructions of the MCU; and a power supply device, with an input power supply and an output connected to the MCU, the signal processing unit, and the storage unit, for converting the input power supply into the operating voltage required by the device.
[0027] like Figures 2-5As shown, the product structure consists of an upper cover and a lower cover, which are internally secured to the PCBA (Printed Circuit Board Assembly) and fastened with screws. The entire USB product's circuitry comprises input / output connectors, a power conversion section, an MCU processing unit, an FM / DAB signal receiving and conversion unit (i.e., a dual-channel receiver chip), a signal demodulation unit, and a Flash unit. The product design is miniaturized, allowing it to function as a standalone product via USB, suitable for installation in various vehicles. Its small size meets the functional configuration requirements of both OEM and aftermarket applications.
[0028] In this embodiment, the storage unit (Flash unit) stores the startup code of the demodulation unit and the FM / DAB signal receiving and conversion unit chip. The startup code is pre-programmed, and upon power-up, the state configuration is consistently written into the chip. The storage unit pre-stores the startup code and configuration parameters to ensure that each unit can quickly load the preset logic after power-up.
[0029] Through the embodiments of this disclosure, the technical problem of being unable to receive radio frequency signals when the DAB signal is weak is at least partially solved by seamless switching between digital audio broadcasting (DAB) signals and FM broadcasting, thus achieving the technical effect of full-area broadcast coverage.
[0030] Based on the above embodiments, a dual-channel receiver chip, connected to an antenna, a microcontroller unit, a storage unit, and a signal demodulation unit, is used to convert the antenna's radio frequency signal into an audio signal; it sends the status parameters of the radio frequency signal strength of the digital audio broadcast to the microcontroller unit so that the microcontroller unit can issue control commands to control the operating mode; the signal demodulation unit, connected to the microcontroller unit, storage unit, and dual-channel receiver chip, is used to demodulate the audio signal for transmission to the microcontroller unit; wherein, the dual-channel receiver chip integrates an FM broadcast receiver and a digital audio broadcast tuner; the operating mode includes at least one of an FM broadcast mode and a digital audio broadcast mode.
[0031] Through the embodiments of this disclosure, the dual-channel chip feeds back the DAB signal strength to the MCU, enabling the MCU to issue mode switching instructions based on the actual signal state, providing a basis for seamless switching. The dual tuner chips operate independently in FM receiver and DAB tuner modes, respectively. The FM receiver outputs a digital audio I2S signal, and the DAB tuner outputs a digital I / Q intermediate frequency audio signal. Both audio outputs are sent to the subsequent demodulator chip.
[0032] Based on the above embodiments, the FM broadcast mode is configured so that the FM broadcast receiver and the digital audio broadcast tuner work simultaneously.
[0033] Based on the above embodiments, the signal demodulation unit is also used to align the audio signal output by the FM broadcast receiver and the audio signal output by the digital audio broadcast tuner to obtain the output audio signal.
[0034] In the embodiments disclosed herein, one channel of the chip operates in FM receiver tuner mode and another channel operates in DAB tuner mode. The FM receiver outputs digital audio to the back-end DAB seamless receiver demodulator. The signal demodulation unit performs data and audio demodulation and completes the alignment of analog FM and digital DAB audio signals, thereby achieving seamless signal reception and switching between digital audio and FM broadcasting, and realizing broadcast coverage throughout the entire area.
[0035] Based on the above embodiments, the digital audio broadcasting mode is configured to allow at least two digital audio broadcasting tuners to operate simultaneously; the at least two digital audio broadcasting tuners are respectively configured to digital audio broadcasting standards of different regions.
[0036] In this embodiment, the export market for DAB products is the EU and the Middle East, requiring certifications such as CE / RoHS / TDRA / Reach / UAE.S 5021 / SASO 2938 / GSO 2693. The main application market is in the passenger car sector, but it can also be used in other commercial vehicles and other fields. By configuring different digital audio broadcast tuners to different regional standards, the digital audio broadcast tuner has strong compatibility and can obtain stronger radio frequency signals for the signal demodulation unit to output stronger audio signals.
[0037] Based on the above embodiments, the signal demodulation unit (Decoder) is also used to compare the strength of the audio signals output by at least two digital audio broadcast tuners so as to use the audio signal with higher strength as the output audio signal.
[0038] Through the embodiments of this disclosure, the dual-channel receiver chip operates independently in two regional DAB tuner modes. The DAB tuner outputs digital intermediate frequency (IF) audio signals to the back-end DAB seamless receiver for data and audio demodulation. It also performs signal strength comparison of the digital DAB audio signals from the two regions and switches to the stronger signal frequency. This enables comparison of strong and weak DAB signals, automatic channel switching, and seamless switching, enhancing end-user satisfaction.
[0039] Based on the above embodiments, the microcontroller unit is connected to the vehicle integrated information processing system via a universal serial bus.
[0040] Through embodiments of this disclosure, a split design is achieved using a USB design.
[0041] Based on the above embodiments, the power supply device includes a first low-dropout linear regulator and a second low-dropout linear regulator; the first low-dropout linear regulator (IDO 3.3V) is connected to the power supply at its input and to the second low-dropout linear regulator (IDO 1.8V), microcontroller unit, universal serial bus, signal demodulation unit, and storage unit at its output, and is used to power the first module of the second low-dropout linear regulator, microcontroller unit, universal serial bus, signal demodulation unit, and storage unit; the second low-dropout linear regulator is connected to the dual-channel receiver chip and signal demodulation unit at its output, and is used to power the second module of the dual-channel receiver chip and signal demodulation unit.
[0042] Through the embodiments of this disclosure, the vehicle controller is connected to the DAB product via a shielded twisted pair cable through the dedicated USB HSD interface to complete the power supply; the central control vehicle controller outputs 5V power, which is converted into the operating voltage required by the system through an LDO power chip.
[0043] Based on the above embodiments, the microcontroller unit is used to receive and process information from the vehicle integrated information processing system; send control commands to the signal processing unit to control the operating mode according to the status signals transmitted by the signal processing unit; and send audio signals sent by the signal processing unit to the vehicle integrated information processing system; the operating mode includes at least one of FM broadcast mode and digital audio mode.
[0044] Through the embodiments of this disclosure, the MCU unit controls the power supply and performs register configuration and operating status control of the dual-channel signal receiver and audio demodulation chip via the SPI interface.
[0045] Those skilled in the art will understand that the features described in the various embodiments and / or claims of this disclosure can be combined or combined in various ways, even if such combinations or combinations are not explicitly described in this disclosure. In particular, the features described in the various embodiments and / or claims of this disclosure can be combined or combined in various ways without departing from the spirit and teachings of this disclosure. All such combinations and / or combinations fall within the scope of this disclosure.
[0046] The embodiments of this disclosure have been described above. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of this disclosure. Although various embodiments have been described above, this does not mean that the measures in the various embodiments cannot be used advantageously in combination. The scope of this disclosure is defined by the appended claims and their equivalents. Various substitutions and modifications can be made by those skilled in the art without departing from the scope of this disclosure, and all such substitutions and modifications should fall within the scope of this disclosure.
Claims
1. A multi-channel multi-mode broadcast receiving apparatus, characterized by comprising: include: The microcontroller unit is connected to the storage unit via a bus, and is also connected to the in-vehicle integrated information processing system and signal processing unit. The storage unit is connected to the microcontroller unit and the signal processing unit via a bus. It is used to store the startup code and preset chip configuration parameters of the signal processing unit for transmission to the microcontroller unit via the bus. The signal processing unit includes a dual-channel receiving chip and a signal demodulation unit, which are connected to the antenna, a storage unit, and a microcontroller unit. It is used to convert the radio frequency signal of the antenna into an audio signal for transmission to the microcontroller unit through FM broadcast mode or digital audio broadcast mode, according to the control instructions of the microcontroller unit. The power supply unit connects to a power source at the input and to a microcontroller unit, signal processing unit, and storage unit at the output. It is used to convert the input power source into the operating voltage required by the device.
2. The apparatus of claim 1, wherein, The dual-channel receiver chip is connected to the antenna, the microcontroller unit, the storage unit, and the signal demodulation unit. It is used to convert the antenna's radio frequency signal into an audio signal and to send the status parameters of the radio frequency signal strength of the digital audio broadcast to the microcontroller unit so that the microcontroller unit can issue control commands to control the operating mode. The signal demodulation unit is connected to the microcontroller unit, the storage unit, and the dual-channel receiver chip, and is used to demodulate the audio signal for transmission to the microcontroller unit. The dual-channel receiver chip integrates an FM radio receiver and a digital audio radio tuner; the operating mode includes at least one of an FM radio mode and a digital audio radio mode.
3. The apparatus of claim 2, wherein, The FM broadcast receiver is used to convert the FM broadcast radio frequency signal into a digital audio I2S signal; the digital audio broadcast tuner is used to convert the digital audio broadcast radio frequency signal into a digital I / Q intermediate frequency audio signal.
4. The apparatus of claim 2, wherein, The FM broadcast mode is configured so that the FM broadcast receiver and the digital audio broadcast tuner work simultaneously.
5. The apparatus of claim 4, wherein, The signal demodulation unit is also used to align the audio signal output from the FM radio receiver and the audio signal output from the digital audio radio tuner to obtain the output audio signal.
6. The apparatus of claim 2, wherein, The digital audio broadcasting mode is configured to allow at least two digital audio broadcasting tuners to operate simultaneously; the at least two digital audio broadcasting tuners are configured to use digital audio broadcasting standards of different regions.
7. The apparatus of claim 5, wherein, The signal demodulation unit is also used to compare the strength of audio signals output from at least two digital audio broadcast tuners so that the audio signal with the higher strength can be used as the output audio signal.
8. The apparatus of claim 1, wherein, The microcontroller unit is connected to the vehicle integrated information processing system via a universal serial bus.
9. The apparatus of claim 8, wherein, The power supply unit includes a first low-dropout linear regulator and a second low-dropout linear regulator; The first low-dropout linear regulator has its input connected to a power supply and its output connected to a second low-dropout linear regulator, a microcontroller, a universal serial bus, a signal demodulation unit, and a storage unit. It is used to power the first module of the second low-dropout linear regulator, the microcontroller, the universal serial bus, the signal demodulation unit, and the storage unit. The second low-dropout linear regulator has its output connected to the dual-channel receiver chip and the signal demodulation unit, and is used to power the second module of the dual-channel receiver chip and the signal demodulation unit.
10. The apparatus of claim 1, wherein, The micro control unit is used for receiving and processing information of the vehicle integrated information processing system, sending control instructions to the signal processing unit for controlling the working mode according to the state signal transmitted by the signal processing unit, sending the audio signal transmitted by the signal processing unit to the vehicle integrated information processing system, and the working mode at least includes one of the frequency modulation broadcast mode and the digital audio mode.