Dynamic Voice Command Vocabulary for Vehicle HMI
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Solution Overview
Problem
Conventional vehicle human-machine interfaces with speech recognition modules are limited by static, predefined vocabularies and menu structures, which can distract drivers and fail to efficiently access continuously updated online digital contents, especially in vehicles with autonomous driving capabilities.
Innovation Solution
A flexible human-machine interface with a speech recognition module that recognizes natural-language command words, including dynamically updated keywords associated with digital contents, using a keywording module to analyze and abstractly describe digital content, allowing for expanded vocabulary and access to online retrievable digital content without permanent storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a speech recognition module with a predefined vocabulary is used, then the system can recognize specific command words, but the vocabulary is limited and cannot adapt to dynamically updated online digital contents
Solution Approach 1:
The patent implements a dynamic vocabulary update mechanism where the speech recognition module's command vocabulary is automatically expanded with keywords extracted from online digital contents. This allows the system to adapt to new content without manual reconfiguration, resolving the contradiction between vocabulary adaptability and system complexity by making the vocabulary dynamic rather than static.
Solution Approach 2:
The system performs self-updating of its command vocabulary by automatically extracting keywords from online digital contents and integrating them into the speech recognition module. This self-service mechanism eliminates the need for manual vocabulary updates while maintaining adaptability to new content, thereby resolving the technical contradiction.
2Ease of operation
If a hierarchical menu structure is used, then the functional systems are well-organized, but multiple menu entries must be spoken which distracts the driver
Solution Approach 1:
The patent extracts the essential function of accessing online digital contents from the traditional hierarchical menu structure. By directly recognizing keywords related to digital contents and bypassing intermediate menu navigation steps, the system reduces the number of speech commands required while maintaining organized access to functions, thereby reducing driver distraction.
Solution Approach 2:
The system pre-loads and prepares online digital contents and their associated keywords before the driver needs to access them. This preliminary action allows the speech recognition module to directly match driver commands with pre-prepared content options, eliminating the need for sequential menu navigation and reducing operational time and distraction.
3Adaptability or versatility
If online digital contents are accessed without permanent storage, then the system remains flexible and up-to-date, but the contents cannot be reliably retrieved and displayed
Solution Approach 1:
The patent implements a feedback mechanism where the system continuously monitors and retrieves updates of online digital contents. By establishing a reliable communication channel between the vehicle system and external content sources, the system ensures that keywords and content data are accurately retrieved and displayed while maintaining flexibility and up-to-date information.
Data Source
AI summary
The disclosure relates to a human-machine interface (HMI) for a vehicle having a microphone for registering a command word spoken by a driver or further occupant of the vehicle and a control unit, which has a speech recognition module for recognizing multiple specific command words.