Bluetooth Receiver Signal Quality Segmentation for Data Loss Concealment
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Solution Overview
Problem
Bluetooth technologies with limited retransmission mechanisms and no error correction coding suffer from data loss during voice or audio transmission, leading to communication performance and reliability issues due to sudden interference in the 2.4 GHz frequency band.
Innovation Solution
A Bluetooth receiving method that processes load data based on signal quality of pre-stored data segments with failed CRC results, using those with good signal quality to conceal data loss and improve communication reliability when retransmission times are exhausted.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a limited retransmission mechanism without error correction coding is used for Bluetooth voice and audio transmission, then device complexity and power consumption are reduced, but data reliability deteriorates due to data loss in interference-prone environments
Solution Approach 1:
The patent applies preliminary action by pre-storing multiple versions of load data with different CRC results before transmission occurs. When data loss is detected, the receiver can immediately use the pre-stored good-quality data segments without waiting for retransmission, thus improving reliability while maintaining simple transmission mechanisms.
Solution Approach 2:
The patent changes the parameter of data quality assessment by introducing signal quality evaluation based on signal angle difference. Instead of treating all stored data equally, the system evaluates and selects data segments with better signal quality (smaller angle difference), thereby improving reliability through parameter-based selection rather than through complex error correction coding.
2Ease of operation
If packet loss concealment technology is used to conceal damage caused by data loss, then voice or audio quality is maintained, but communication reliability deteriorates because data loss cannot be prevented
Solution Approach 1:
The patent converts the harmful effect of data loss into a benefit by using the pre-stored data segments (which would normally be redundant) as a resource for recovery. When CRC failure occurs, the system beneficially reuses these pre-stored segments with good signal quality to reconstruct lost data, turning potential waste into a reliability-improving mechanism.
Solution Approach 2:
The patent introduces signal quality evaluation (based on signal angle difference) as an intermediary mechanism between data reception and audio output. This intermediary assesses the quality of pre-stored data segments and selects appropriate ones for concealment, bridging the gap between raw data and reliable audio reproduction without requiring complex error correction.
3Reliability
If multiple pre-stored load data with failed CRC results are processed based on signal quality, then data reliability is improved by selecting good-quality segments, but device complexity increases due to additional processing requirements
Solution Approach 1:
The patent applies segmentation by dividing load data into multiple data segments and evaluating the signal quality of each segment independently based on signal angle difference. This allows the system to process only necessary segments and select those with good quality, reducing overall processing complexity compared to evaluating entire data blocks.
Solution Approach 2:
The patent implements local quality assessment by evaluating signal quality at the segment level rather than treating all data uniformly. Each data segment is assessed individually based on its signal angle difference, allowing the system to identify and use only the locally good-quality segments, thereby improving reliability without requiring complex global processing.
Data Source
AI summary
A Bluetooth receiving method, a Bluetooth receiver, and a Bluetooth audio device are disclosed in the present invention. The Bluetooth receiving method includes: obtaining load data and a CRC result of the load data, and processing the load data based on signal quality of each of a plurality of data segments in one or more pre-stored load data having failed CRC results when the CRC result of the load data fails and a remaining retransmission time for the load data is no longer available. The signal quality is determined based on a signal angle difference before and after judgment for each of the plurality of data segments in each load data during demodulation. By using solutions provided in the present invention, damage caused by a data loss to a voice or audio can be concealed, and data reliability of limited retransmission of Bluetooth can be effectively improved, thereby improving Bluetooth communication performance.