Smart Blanking for Background Noise in Wireless Communication
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Solution Overview
Problem
Current wireless communication systems face challenges in conserving bandwidth while maintaining voice quality, as they continuously transmit 1/8 rate frames for background noise information, which increases overhead and reduces system capacity.
Innovation Solution
The method involves selectively dropping or 'blanking' background noise frames and updating them only when necessary, using a smart blanking apparatus that filters and compares energy and spectral differences to determine when to transmit new frames, thereby reducing unnecessary data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous transmission of 1/8 rate frames is used to communicate background noise information, then voice quality is maintained, but bandwidth requirements increase and system capacity decreases
Solution Approach 1:
The patent extracts and transmits only the essential background noise information (prototype frames) rather than continuously transmitting all 1/8 rate frames. By identifying and removing redundant frame transmissions, the system maintains voice quality while significantly reducing bandwidth consumption.
Solution Approach 2:
Instead of continuous transmission, the patent implements periodic transmission of background noise frames based on change detection. Frames are transmitted periodically only when the background noise characteristics change beyond a threshold, converting continuous transmission into event-driven periodic transmission.
2Reliability
If all 1/8 rate frames are transmitted to ensure accurate background noise reproduction, then speech quality is maintained, but overhead increases and system capacity is reduced
Solution Approach 1:
The patent implements a feedback mechanism where the transmitter monitors background noise changes and compares them against threshold criteria. Based on this feedback, the system intelligently determines whether to transmit a frame or skip transmission, optimizing the balance between speech quality and system capacity.
Solution Approach 2:
The patent changes the transmission parameter from fixed-rate continuous transmission to variable-rate transmission based on background noise stability. When background noise parameters remain stable within thresholds, transmission is suppressed; when parameters change significantly, transmission is triggered.
3Quantity of substance
If background noise frames are blanked to reduce overhead, then bandwidth requirements are reduced, but accurate reproduction of background noise becomes challenging
Solution Approach 1:
The patent performs preliminary analysis of background noise stability before deciding to blank frames. By pre-evaluating whether noise characteristics have changed beyond thresholds, the system ensures that blanking decisions are made only when safe, maintaining reproduction accuracy while reducing bandwidth.
Solution Approach 2:
The system uses its own monitoring capabilities to detect when background noise remains stable and can be safely blanked. The transmitter self-regulates transmission based on its own observations of noise stability, eliminating the need for continuous external verification.
Data Source
AI summary
The present invention comprises a method of communicating background noise comprising the steps of transmitting background noise, blanking subsequent background noise data rate frames used to communicate the background noise, receiving the background noise and updating the background noise. In another embodiment, the present invention comprises an apparatus for communicating background noise comprising a vocoder, at least one smart blanking apparatus operably connected to the vocoder, a de jitter buffer operably connected to the smart blanker; and a network stack operably connected to the input of the de jitter buffer and the an output of the smart blanking apparatus.