Smart Rearview Mirror FM Audio Frequency Synchronization
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Solution Overview
Problem
The existing smart rearview mirror systems face challenges in automatically maintaining FM carrier frequency synchronization between the smart rearview mirror and vehicle-mounted devices, leading to issues like audio signal not playing or deteriorated quality.
Innovation Solution
An audio play method and device that automatically detect and adjust FM carrier frequency synchronization by sending a frequency adjustment request from the smart rearview mirror to the vehicle-mounted device via a wireless connection, ensuring both devices operate on the same FM carrier frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual tuning is used to synchronize FM carrier frequency between smart rearview mirror and vehicle-mounted device, then frequency synchronization can be achieved, but user time consumption increases and user experience deteriorates
Solution Approach 1:
The system automatically detects frequency drift and sends adjustment requests between the smart rearview mirror and vehicle-mounted device, enabling self-correction of frequency synchronization without requiring user intervention. The terminal device autonomously monitors playback quality and initiates frequency adjustments when drift is detected.
Solution Approach 2:
The system implements a feedback mechanism where the terminal device monitors the quality of audio playback and detects frequency drift conditions. Based on this feedback, the system automatically triggers frequency adjustment requests to maintain synchronization, creating a closed-loop control system that continuously maintains optimal frequency alignment.
2Reliability
If manual tuning is used to maintain FM carrier frequency synchronization, then frequency alignment can be restored, but operation complexity increases for users
Solution Approach 1:
The system performs automatic frequency drift detection and adjustment, making the frequency synchronization process self-service. The terminal device and vehicle-mounted device communicate autonomously to detect and correct frequency misalignment, completely eliminating the need for users to perform manual tuning operations.
Solution Approach 2:
The system introduces an automatic frequency adjustment mechanism as an intermediary between the smart rearview mirror and vehicle-mounted device. This intermediary automatically detects frequency drift and coordinates frequency adjustments, shielding users from the complexity of frequency synchronization operations.
3Reliability
If FM frequency drift occurs between smart rearview mirror and vehicle-mounted device, then audio playback quality deteriorates, but automatic detection and adjustment mechanisms are needed to prevent this
Solution Approach 1:
The terminal device monitors audio playback quality and detects frequency drift through feedback mechanisms. When drift is detected, the system automatically generates and sends frequency adjustment requests to the vehicle-mounted device, creating a closed-loop control system that maintains playback quality without requiring complex user-side modifications.
Solution Approach 2:
The system performs preliminary frequency drift detection and adjustment before significant quality deterioration occurs. By continuously monitoring and proactively adjusting frequency alignment, the system prevents playback quality issues rather than reacting to them after they manifest.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enhances the reliability of audio playback by ensuring real-time FM carrier frequency synchronization without requiring user intervention, thereby improving user experience.
Implementation Method 1
the smart rearview mirror may send an MP3 (Moving Picture Experts Group Audio Layer-3, MP3) song to a vehicle-mounted device in an FM manner
Implementation Method 2
the vehicle-mounted device receives the MP3 song, completes FM demodulation, and plays the MP3 song
Data Source
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AI summary
This application discloses an audio play method and a device, and relates to the field of terminal technologies, to resolve a problem that FM carrier frequency synchronization cannot be automatically implemented between a second device and a first device. The method is applied to a first device, and the first device disables an audio play function of the first device. The method includes: sending, by the first device, a to-be-played audio signal to a second device in a frequency modulation FM manner, so that the second device plays the to-be-played audio signal; receiving, by the first device, an audio signal from an environment in which the first device is located; and if the first device determines that the received audio signal does not match the to-be-played audio signal, sending, by the first device, a frequency adjustment request to the second device, where the frequency adjustment request is used to instruct the second device to implement FM carrier frequency synchronization between the second device and the first device.