Wireless Display Reception With Local APL Recovery
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Solution Overview
Problem
In wireless display systems, the transmission of average picture level (APL) data is often disrupted by obstacles or signal interference, leading to image quality deterioration such as flickering due to mismatched image frames and APL data.
Innovation Solution
The wireless reception device generates APL data independently when the transmission is poor, using previously calculated APL values from stored image data to ensure stable image output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wireless communication standards operate in the 2.4 GHz ISM band, then global compatibility and ease of operation are improved, but communication reliability deteriorates due to interference from home appliances and other wireless devices
Solution Approach 1:
The patent implements dynamic frequency selection (DFS) that continuously monitors the radio environment and automatically switches operating frequencies to avoid interference. The system dynamically adjusts the carrier frequency based on detected interference levels from microwave ovens, Bluetooth devices, and other sources, maintaining reliable communication while operating in the unlicensed 2.4 GHz band.
Solution Approach 2:
The patent changes multiple communication parameters including frequency hopping patterns, transmission power levels, and modulation schemes based on channel conditions. By dynamically adjusting these parameters in response to interference detection, the system maintains reliable communication links while operating in the congested ISM band.
2Manufacturing precision
If screen resolution and audio quality are improved in wireless display systems, then image and sound quality are enhanced, but bandwidth requirements increase leading to higher data loss in packet-based wireless communication
Solution Approach 1:
The patent implements forward error correction (FEC) and packet redundancy mechanisms that encode error correction data in advance before transmission. By pre-calculating and embedding correction codes in the transmitted data stream, the system can reconstruct lost or corrupted high-resolution video and audio packets without requiring retransmission, thus maintaining quality while accounting for wireless packet loss.
Solution Approach 2:
The patent implements automatic repeat request (ARQ) mechanisms where the receiving device monitors packet integrity and requests retransmission of lost or corrupted data. The transmitting device uses this feedback to re-send critical video and audio packets, ensuring that high-quality multimedia content is delivered reliably over the lossy wireless channel.
Data Source
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AI summary
A wireless reception device, according to the present disclosure, can autonomously generate APL data for a video signal, when the wireless reception device cannot receive APL data transmitted by a wireless transmission device due to deterioration and disconnection of a wireless signal.