Radio Communication System Data Insertion in Audio Frames
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Solution Overview
Problem
Existing radio communication systems designed for digital audio communication limit data communication speed, and when an existing radio apparatus without fast data mode support receives packets with data for communication inserted in audio frames, it decodes this data as audio, resulting in abnormal sounds.
Innovation Solution
A radio communication system that inserts data for data communication into audio frames, excluding a specific position in the audio frame, and uses unique data in that position, allowing existing radio apparatuses to retrieve and concatenate data portions correctly, reducing abnormal sounds to a non-practical level.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data for data communication is inserted into audio frames to increase communication speed, then the communication speed of data communication is improved, but existing radio apparatuses that do not support fast data mode will decode the data as audio and output abnormal sounds
Solution Approach 1:
The patent applies local quality by inserting unique data only at a specific position (5th position) within the audio frame structure, while maintaining audio signal data at other positions. This localized modification allows fast data mode apparatuses to identify and extract data correctly without causing abnormal sounds in legacy apparatuses that process the entire frame as audio.
Solution Approach 2:
The unique data at the 5th position acts as an intermediary marker that enables fast data mode apparatuses to distinguish between audio frames containing data communication and standard audio frames. This intermediary element allows selective processing without requiring changes to the overall audio frame structure, thus avoiding harmful effects on legacy equipment.
2Productivity
If data for data communication is inserted into audio frames, then high-speed data communication is enabled, but compatibility with existing radio apparatuses is reduced
Solution Approach 1:
The patent segments the audio frame into multiple positions, with the 5th position reserved for unique data and other positions for audio signal data. This segmentation allows existing apparatuses to process only the audio portions while fast data mode apparatuses can extract data from the segmented structure, maintaining compatibility across different device types.
Solution Approach 2:
The audio frame structure is designed to serve multiple functions: it can carry audio signal data for legacy apparatuses and simultaneously embed data communication information for fast data mode apparatuses. The unique data at the 5th position enables the same frame structure to be universally compatible while supporting enhanced functionality.
Data Source
AI summary
When operating the radio communication system in a mode for transmitting data for data communication instead of audio signal data, a transmission unit of a radio apparatus generates a packet in which data for data communication is inserted in positions in an audio frame, except for a given position, and in a data frame, and unique data is inserted in the given position in the audio frame. Also, data that is likely to cause an error when the data inserted in the audio frame is decoded by using an audio codec is used as the unique data.