Hearing-Based Audio Signal Quantization for Lower Wireless Traffic
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Solution Overview
Problem
Electronic devices experience delays and corruption of audio signals due to distance and interference in short-range wireless communication, leading to increased data traffic and potential deterioration of sound quality.
Innovation Solution
An electronic device processes audio signals by dividing audible frequency bands based on user hearing characteristics, applying different quantization bit numbers for each band, and generating a bitstream for transmission to an external device, with inverse-quantization performed on received bitstreams to restore the audio signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the amount of encoded data is increased to provide high-quality audio service, then audio quality is improved, but traffic on the radio channel increases
Solution Approach 1:
The patent applies different quantization bit numbers to different frequency bands based on user hearing characteristics. Specifically, frequency bands where users are more sensitive receive higher quantization precision (more bits), while less sensitive bands receive lower precision (fewer bits). This local differentiation of quality maintains high perceived audio quality while reducing overall data traffic compared to uniform high-quality encoding.
Solution Approach 2:
The patent changes the quantization parameter (bit number) dynamically based on frequency band and user hearing characteristics. By adjusting the quantization bit number according to the sensitivity of each frequency band, the system optimizes the balance between audio quality and data transmission volume, achieving high quality where needed while minimizing overall traffic.
2Ease of manufacture
If uniform quantization is applied across all frequency bands, then encoding is simple, but audio quality deteriorates in sensitive frequency bands
Solution Approach 1:
The patent divides the audio signal into multiple frequency bands and applies different quantization bit numbers to each band based on user hearing sensitivity. This allows the system to maintain simplicity in the encoding framework while achieving high audio quality in sensitive frequency bands through localized precision enhancement.
Solution Approach 2:
The patent segments the audio frequency spectrum into multiple bands and applies different quantization strategies to each segment. This segmentation allows the system to optimize quality where needed while maintaining overall encoding efficiency, resolving the contradiction between simplicity and quality.
3Measurement precision
If high quantization bit numbers are used for all frequency bands, then audio quality is maintained, but data volume increases
Solution Approach 1:
The patent applies high quantization bit numbers only to frequency bands where users are sensitive, while using lower bit numbers for less sensitive bands. This localized application of high precision maintains audio quality in critical bands while significantly reducing overall data volume compared to uniform high-precision encoding.
Solution Approach 2:
The patent dynamically changes the quantization bit number parameter based on frequency band and user hearing characteristics. This parameter optimization ensures high audio quality where needed while minimizing data volume through reduced precision in less critical bands.
Data Source
AI summary
A method for controlling an electronic device is provided. The control method includes obtaining a quantization bit number for each division audible frequency band dividing an audible frequency band based on the preset user's hearing characteristic, performing quantization using a quantization bit number corresponding to an audio signal, for each division audible frequency band extracted from an audio signal output by reproduction of audio content, and generating an audio signal quantized for each division audible frequency band as a bitstream and transmitting the bitstream to an external electronic device through a radio channel.