Image Transmission Apparatus Dynamic Bandwidth Quality
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Solution Overview
Problem
Existing image transmission systems face challenges in maintaining high refresh rates and image quality due to limited bandwidth, as they often require fixed compression ratios and extensive extension processing, which can lead to reduced image quality and increased bandwidth usage.
Innovation Solution
An image transmission apparatus that generates and compresses updated image data for specific regions, dynamically adjusts image quality based on available bandwidth, and stores quality and time information for selective retransmission, allowing for efficient use of bandwidth and maintaining image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If lossless compression method is used to transmit images without distortion, then image quality is maintained, but compressed image data size becomes larger than usable transmission bandwidth
Solution Approach 1:
The patent implements dynamic quality adjustment by switching between lossless and lossy compression modes based on real-time transmission conditions. The system can adaptively select compression methods and parameters to match available bandwidth, resolving the contradiction between maintaining image quality and fitting within transmission bandwidth constraints.
Solution Approach 2:
The system changes compression parameters dynamically by adjusting quality levels, compression ratios, and selection criteria for image blocks based on transmission bandwidth availability. This allows the system to optimize between image quality preservation and data size reduction according to actual transmission conditions.
2Quantity of substance
If bigger quantization unit is used to reduce compressed data size, then transmission bandwidth usage is reduced, but image quality deteriorates
Solution Approach 1:
The patent applies different compression qualities to different blocks of images based on their importance and change frequency. Critical blocks that change frequently maintain higher quality, while less important blocks use lower quality compression, achieving optimal balance between overall data size and perceived image quality.
Solution Approach 2:
The system transmits only the most essential image data (partial action) by selecting significant blocks for transmission rather than transmitting the complete image at full quality. This approach reduces total data volume while maintaining acceptable overall image quality through strategic prioritization.
3Productivity
If extension processing is used to obtain previous appearance of image, then high refresh rate and resolution can be maintained, but processing burden increases significantly
Solution Approach 1:
The system performs preliminary classification of image blocks into significant and non-significant categories before compression. By pre-determining which blocks need high-quality transmission based on change detection and importance assessment, the system avoids the heavy processing burden of full extension processing while still achieving high refresh rates.
Solution Approach 2:
The patent extracts only the essential information needed for transmission by identifying and transmitting only significant image blocks rather than processing the entire image. This extraction approach maintains high refresh rates while dramatically reducing processing requirements compared to full extension processing.
Data Source
AI summary
In an image transmission apparatus an image data generator generates image data that represents an image. An updated image data generator generates updated image data that represents an updated image of an updated region of the image. A compressor compresses the updated image data. A transmitter stores the updated image data that is compressed by the compressor. An updated image data storage stores the updated image data. A transmission result storage stores transmission result data that includes quality information and time information, the quality information relating to an image quality, the time information indicating when the updated image data is generated. A transmission data selector selects the updated image data stored in the updated image data storage, and sets the image quality of the updated image data selected, according to the transmission result data stored in the transmission result storage.