Portable Radio Stand-Alone Speech Recognition Controller
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Solution Overview
Problem
Existing portable radios face challenges in managing and navigating due to limited internet access, memory, processing capability, and power, making speech recognition systems inefficient for simple commands, especially in size, weight, and power (SWaP) constrained devices.
Innovation Solution
A radio system with a stand-alone speech recognition and text-to-speech (TTS) function, integrated into a portable housing, using a controller to store command and speech messages, and convert speech into text messages for transmission, operating at low bit rates and bandwidth, enabling hands-free and eyes-free operation without internet connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If speech recognition systems use internet connection and direct connection to speech database, then speech recognition accuracy is improved, but device complexity and power consumption increase
Solution Approach 1:
The patent extracts the speech recognition and text-to-speech functions from external internet servers and embeds them locally within the portable radio device. The controller contains built-in speech recognition algorithms and TTS synthesis capabilities, allowing the device to process speech commands and generate speech output independently without requiring connection to external databases or servers.
Solution Approach 2:
The portable radio becomes self-sufficient by incorporating its own speech recognition and TTS capabilities internally. The device processes speech inputs, converts them to text, and synthesizes speech outputs using its own controller resources, eliminating dependence on external internet infrastructure or base station connections for these functions.
2Measurement precision
If speech messages are transmitted using MELP vocoder at 2400 bit/s, then speech quality is improved, but data transmission time and memory requirements increase
Solution Approach 1:
The patent changes the bit rate parameter of the speech codec from conventional higher rates (such as MELP at 2400 bit/s) to a lower rate of 75 bit/s or less. This parameter change significantly reduces the data volume required for transmitting speech commands and responses, decreasing transmission time and memory requirements while maintaining adequate speech recognition and synthesis functionality for command-and-control operations.
3Weight of moving object
If portable radio operates with limited memory and processing capability, then device portability is improved, but speech recognition capability deteriorates
Solution Approach 1:
The patent implements a simplified speech recognition system that handles only specific command phrases and speech patterns relevant to radio operation, rather than attempting full general-purpose speech recognition. The controller is designed to recognize and process a limited vocabulary of pre-defined commands, which reduces computational requirements and memory usage while providing sufficient automation for the intended application.
Solution Approach 2:
The system adjusts processing parameters by operating at reduced bit rates (75 bit/s or less) and using optimized algorithms suitable for embedded controllers with limited resources. These parameter changes enable speech recognition functionality to operate within the constraints of portable device memory and processing capabilities.
4Adaptability or versatility
If radio system uses stand-alone speech recognition without internet access, then device independence is improved, but speech recognition accuracy deteriorates
Solution Approach 1:
The patent implements simplified speech patterns and command structures that can be reliably recognized with limited processing resources. Rather than attempting to replicate complex internet-based speech recognition accuracy, the system uses copied and adapted speech recognition algorithms optimized for embedded operation, focusing on recognizing specific predefined commands with high reliability.
Data Source
AI summary
A portable radio may include a radio frequency (RF) transmitter, an RF receiver, and an audio input transducer. A controller may store command messages and speech messages, implement a stand-alone, speech recognition and text-to-speech (TTS) function for the stored command messages and stored speech messages. The controller may also control at least one of an RF transmitter and RF receiver of a remote radio based upon an input command matching one of the stored command messages using the audio input transducer and the stand-alone speech recognition and TTS function, and convert a speech message matching one of the stored speech messages into a text message. The RF transmitter may send the text message to the remote receiver.