Network Microphone Voice Verification for Secure Media Playback
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Solution Overview
Problem
Existing voice-assisted media playback systems lack effective local verification mechanisms to authenticate user commands, leading to potential unauthorized control over media playback and privacy concerns due to reliance on remote voice verification services.
Innovation Solution
Implementing local voice biometric verification within network microphone devices to authenticate user commands independently of remote voice assistants, enabling secure and private control of media playback without sending raw user data to remote servers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If local voice biometric verification is implemented within network microphone devices, then user control and privacy are enhanced, but device complexity increases
Solution Approach 1:
The patent extracts the voice verification function from remote cloud services and implements it locally within the network microphone device. The voice verifier is integrated into the device's processing system, allowing biometric authentication to occur on-device without requiring continuous connection to remote servers. This extraction of the verification function to the local device level resolves the contradiction by enhancing privacy and control while managing complexity through on-device processing.
Solution Approach 2:
The network microphone device performs self-verification of voice commands using its integrated voice verifier. The device autonomously authenticates speakers against stored voice profiles without requiring external verification services. This self-service capability allows the device to independently determine whether a voice command should be executed, thereby enhancing user control and privacy while reducing dependency on complex remote infrastructure.
2Device complexity
If raw user data is sent to remote servers for verification, then centralized control is simplified, but privacy concerns increase
Solution Approach 1:
The patent extracts sensitive user voice data processing from remote servers and relocates it to the local network microphone device. The voice verifier operates locally to authenticate speakers, and only verification results (not raw voice data) are processed further. This extraction eliminates the need to send raw user biometric data to remote servers, thereby resolving the privacy concern while maintaining simplified control through local processing.
Solution Approach 2:
The voice verifier acts as an intermediary between the microphone array and the media playback control system. It processes voice inputs locally to determine speaker identity and authentication status before commands are executed. This intermediary function filters and processes sensitive data locally, preventing raw user data from being transmitted to remote servers while maintaining centralized control logic through the verification results.
3Object-affected harmful factors
If voice verification is performed locally, then privacy is protected, but processing time increases
Solution Approach 1:
The patent implements preliminary voice profile creation and storage during device setup or initial authentication. The voice verifier stores encrypted voice profiles locally, enabling rapid comparison against stored data during subsequent authentication events. This preliminary preparation of verification data eliminates the need for time-consuming remote verification processes during actual voice commands, thereby protecting privacy through local processing while minimizing processing time through pre-computed voice templates.
Data Source
Figure 1A
Figure 1B
Figure 2A~2B
AI summary
In one aspect, a network microphone device includes a plurality of microphones and is configured to capture a voice input via the one or more microphones, detect a wake word in the voice input, transmit data associated with the voice input to one or more remote computing devices associated with a voice assistant service, and receive a response from the one or more remote computing devices, the response comprising a playback command based on the voice input. The network microphone device may be configured to obtain verification information characterizing the voice input and, based on the verification information indicating that the voice input was spoken by an unverified user, functionally disable the NMD from performing the playback command.