SoC Audio Codec USB FM Signal Jitter Reduction
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Solution Overview
Problem
Conventional USB Type-C headphones face interference and inconvenience in receiving FM signals due to the USB port's impact on RF modules and the need for system resource allocation, leading to reduced audio quality and inefficient charging.
Innovation Solution
A System on Chip (SoC) integrating a wired transceiver module, a wireless FM demodulation module, and an audio information codec module, which shares a clock system to accurately demodulate and decode both USB data packets and FM signals, reducing jitter and system resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the USB Type-C port is used for receiving FM signals through the user device, then the FM signal reception is enabled, but the USB port interferes with the RF module and reduces audio quality
Solution Approach 1:
The patent divides the audio signal reception into two independent paths: one for USB digital audio and another for FM radio reception. The FM reception function is segmented into a separate module with dedicated RF circuitry, antenna, and demodulation components, independent of the USB Type-C connection path. This segmentation eliminates interference between the USB port and RF module, allowing both functions to operate simultaneously without degrading audio quality.
2Adaptability or versatility
If the USB Type-C connection is used for FM signal transmission, then FM reception is achieved, but the charging function becomes inconvenient
Solution Approach 1:
The patent implements a universal headphone design that supports multiple functions simultaneously: USB digital audio reception, FM radio reception with independent demodulation, and charging through the same USB Type-C port. The system can operate in different modes (USB audio only, FM only, or both together) without requiring separate connections or cables, making the charging process convenient while maintaining full FM reception capability.
3Reliability
If separate modules are used for USB and FM processing, then signal processing is comprehensive, but the number of components and system complexity increases
Solution Approach 1:
The patent merges the USB audio processing module and FM demodulation module into a single integrated system within the headphone device. Both modules share common components such as the digital signal processor, audio output amplifier, and speaker drivers. The USB Type-C port serves as a universal interface for both power/data transmission and FM antenna connection, reducing the total component count while maintaining comprehensive signal processing capabilities for both USB and FM sources.
Data Source
AI summary
Embodiments of systems and methods for transmission of audio information are disclosed herein. In one example, a System on Chip (SoC) includes a wired transceiver module, a wireless module, a Frequency Modulation (FM) demodulation module, and an audio information codec module operatively coupled to the wired transceiver and the FM demodulation module. The wired transceiver module is configured to receive a data packet corresponding to first audio information. The wireless module is configured to receive an FM signal, corresponding to second audio information. The FM demodulation module is configured to output the second audio information based on demodulating the FM signal. The audio information codec module is configured to decode the first audio information and the second audio information based on the data packet and the demodulated FM signal, respectively.