Command Analysis Device for Real-Time Speech Recognition
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Solution Overview
Problem
The existing command analysis systems in speech recognition for automobile infotainment systems experience a time lag between issuing a command and its execution due to the sequential nature of analysis post-speech recognition.
Innovation Solution
The command analysis device performs speech recognition in predetermined units to generate intermediate results, allowing for real-time analysis using intermediate and final result recognition rules, enabling command execution during ongoing speech input.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If speech recognition is performed on the complete speech signal before command analysis, then the accuracy of command recognition is improved, but the time lag between command issuance and execution increases
Solution Approach 1:
The command analysis unit performs preliminary command analysis on intermediate speech recognition results during the speech signal input process, before the complete speech recognition is finalized. This allows the system to identify and execute commands in advance, reducing the overall execution time while maintaining accuracy through subsequent verification against final recognition results.
Solution Approach 2:
The speech recognition process is divided into intermediate results (during input) and final results (after complete input). The command analysis unit operates on segmented intermediate results to enable early command detection, while the system architecture separates command analysis from complete speech recognition, allowing parallel processing and reduced waiting time.
2Reliability
If command analysis is performed after speech recognition completion, then the reliability of command execution is improved, but the productivity of the system decreases
Solution Approach 1:
The system performs preliminary command analysis on intermediate speech recognition results during the speech input process, identifying potential commands before complete recognition is finalized. This preliminary action enables early command execution while maintaining reliability through verification against final recognition results, thus improving both productivity and reliability simultaneously.
Solution Approach 2:
The command analysis unit receives feedback from both intermediate and final speech recognition results. By comparing intermediate command analysis with final recognition outcomes, the system verifies command accuracy and maintains high reliability while enabling faster execution through early intermediate analysis.
Data Source
AI summary
A command analysis device capable of shortening the time until a command is executed is provided. The command analysis device includes a speech recognition unit that performs, every time when a predetermined unit of a speech signal is input, speech recognition on the speech signal and acquires a partial speech recognition result which is an intermediate result, and a command analysis unit that verifies an intermediate result in light of a predetermined intermediate result recognition rule, and outputs an analysis result during the input of the speech signal when a command execution target and a command execution content are successfully analyzed are provided.