Bluetooth Speaker Base Voice Interaction Latency Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current Bluetooth speaker systems face challenges in ensuring both high-quality downlink audio playback and low latency in voice interaction, as the fixed data transmission bandwidth limits the uplink and downlink rates, particularly when using HFP for bidirectional communication, which fails to meet real-time voice interaction requirements and affects user experience.
Innovation Solution
A Bluetooth speaker base with a voice acquisition module, digital signal processing module, and Bluetooth chip that acquires voice data, determines the presence of a wake-up word, compresses the data based on a negotiated compression ratio, and sends it through a first profile to a mobile terminal for decompression and voice recognition, while maintaining high-quality downlink audio playback through a second profile, thereby improving user experience and meeting real-time voice interaction demands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If HFP is used for bidirectional Bluetooth communication, then voice interaction is enabled, but the uplink and downlink transmission rates are limited to 16 kbps, affecting real-time voice interaction requirements
Solution Approach 1:
The patent segments the communication function by introducing a separate voice interaction module that operates independently from the main HFP communication channel. This allows voice data to be transmitted through a dedicated low-latency path while HFP continues to handle audio playback, resolving the bandwidth limitation conflict
Solution Approach 2:
The patent introduces an intermediary processing layer that captures voice input directly from the microphone array and processes it separately from the HFP audio stream. This intermediary path enables voice commands to be transmitted without being constrained by HFP's 16 kbps rate limit
2Loss of time
If the Bluetooth speaker base acquires and processes voice data for wake-up recognition, then real-time voice interaction is improved, but the data transmission bandwidth is insufficient under fixed transmission rates
Solution Approach 1:
The patent implements preliminary voice processing at the speaker base, including wake-up word detection and feature extraction, before transmission. By preprocessing voice data locally and sending only essential features rather than raw audio, the system reduces transmission bandwidth requirements while maintaining real-time recognition performance
Solution Approach 2:
The patent dynamically adjusts transmission parameters based on voice activity detection. During voice interaction events, the system switches to a high-priority transmission mode with optimized compression ratios and packet sizes, effectively increasing usable bandwidth during critical moments without affecting normal playback performance
Data Source
AI summary
The present disclosure provides a Bluetooth speaker base, a method and a system for controlling a Bluetooth speaker base. The method includes: acquiring voice data, and determining whether the voice data includes a wake-up word, when positions of the Bluetooth speaker base and a Bluetooth speaker satisfy a preset condition; controlling the Bluetooth speaker base to enter a wake-up recognition state, and compressing the voice data based on a compression ratio, when the voice data includes the wake word; and sending the voice data compressed to a mobile terminal through a first profile, to cause the mobile terminal to decompress the voice data received, send the voice data decompressed to a server for voice recognition to obtain audio data, and send the audio data to the Bluetooth speaker for playback through a second profile.