Output Layer Parameter Set Referencing in Image Decoding
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Solution Overview
Problem
The increasing demand for high-resolution and high-quality images leads to an increase in transmission and storage costs due to the rise in the amount of transmitted information or bits, necessitating high-efficient image compression technology.
Innovation Solution
An image encoding/decoding method and apparatus that determines whether to reference a parameter set for improved encoding/decoding efficiency, involving the generation and transmission of bitstreams, and the use of computer-readable recording media to store and decode these bitstreams for image reconstruction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If image resolution and quality are improved, then image quality is enhanced, but transmission cost and storage cost increase
Solution Approach 1:
The patent segments the bitstream into multiple layers with different importance levels. Critical layers contain essential image information for basic reconstruction, while non-critical layers contain additional detail information. This segmentation allows the system to transmit only necessary layers based on available bandwidth and storage capacity, thereby maintaining image quality while reducing the quantity of transmitted information.
Solution Approach 2:
The patent applies different compression ratios and quality levels to different regions or layers of the image data. Important regions or layers are preserved with higher quality and less compression, while less important regions undergo higher compression. This local quality approach ensures that critical image information is maintained while reducing overall data volume for transmission and storage.
2Productivity
If compression ratio is increased, then transmission efficiency is improved, but decoding complexity increases
Solution Approach 1:
The patent divides the compressed bitstream into multiple layers that can be independently decoded. The decoder can selectively process only the necessary layers based on system capabilities and requirements, avoiding the need to decode the entire highly-compressed bitstream. This layered segmentation reduces decoding complexity while maintaining transmission efficiency through high compression ratios.
Solution Approach 2:
The patent performs preliminary organization of compressed data into a layered structure during encoding, preparing the bitstream for efficient selective decoding. This preliminary action allows the decoder to quickly identify and process only the required portions of the compressed data without having to analyze or decode unnecessary information, thereby reducing decoding complexity while preserving transmission efficiency.
Data Source
AI summary
An image encoding/decoding method and apparatus is provided. An image decoding method performed by an image decoding apparatus comprises determining reference availability of the parameter set for decoding the image coding data and decoding the image coding data based on the reference availability.