Compensation Data Transmission for QAM Bandwidth Optimization
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Solution Overview
Problem
Television service providers face challenges in maximizing the number of channels on a QAM bandwidth region due to unpredictable bandwidth variations, leading to potential quality drops and the need for lossy recompression, which compromises content quality.
Innovation Solution
Transmitting compensation values in a separate frequency band allows customer equipment to partially or fully reverse compression, maintaining content quality without additional bandwidth usage in the content QAM.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If lossy recompression is applied to reduce bandwidth usage, then bandwidth capacity is maintained, but content quality deteriorates
Solution Approach 1:
The patent extracts the harmful lossy compression artifacts from the transmission process by separating compensation data into a distinct data stream. This compensation data contains the information that was lost during compression, allowing receivers to restore quality without requiring the provider to transmit additional bandwidth for uncompressed content.
Solution Approach 2:
The patent introduces compensation data as an intermediary element between the compressed content and the final decoded output. This compensation data acts as a mediator that enables quality restoration at the receiver端, resolving the contradiction between bandwidth efficiency and content quality by providing a separate mechanism for quality enhancement that does not consume additional content bandwidth.
2Productivity
If more channels are multiplexed onto a QAM bandwidth region, then channel capacity increases, but bandwidth overflow risk increases causing quality drops
Solution Approach 1:
The patent implements a feedback mechanism where compensation data is generated based on the actual compression performed and transmitted alongside the compressed content. This feedback loop allows receivers to automatically compensate for compression artifacts, enabling providers to maintain higher channel densities on QAM bandwidth regions without sacrificing quality stability, as the compensation mechanism dynamically adjusts to bandwidth constraints.
3Reliability
If fewer channels are placed on each QAM bandwidth region, then quality stability improves, but bandwidth utilization efficiency decreases
Solution Approach 1:
The patent changes the parameter of quality representation by separating the quality preservation function from the original content stream. By transmitting compensation data as a separate entity with its own data structure and transmission parameters, the system enables high channel density while maintaining quality stability, as the compensation mechanism operates independently of the content bandwidth allocation.
Data Source
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AI summary
In a data transmission system such as a television service provider system, compensation value data corresponding to information lost during lossy compression of program content (which may or may not already be compressed prior to the lossy compression) may be sent to a customer along with the lossy-compressed content. At the customer end, the compensation value data may be used during decompression to provide higher quality content to the customer than would otherwise be experienced without access to the compensation values.