Deblocking Filter Parameter Signaling in Video Coding
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Solution Overview
Problem
The increasing demand for high-resolution and high-quality images and videos, such as UHD images and videos of 4K or 8K, leads to higher data transmission and storage costs. Additionally, the need for efficient compression technologies is exacerbated by the growing interest in immersive media like VR and AR content.
Innovation Solution
A method and apparatus for improving video/image coding efficiency by efficiently signaling deblocking filter parameter information. This involves deriving deblocking filter parameter information based on flag information in sequence and picture parameter sets, and using this information to perform deblocking filtering on reconstructed pictures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If high-resolution and high-quality images and videos are transmitted using existing wired or wireless wideband lines or storage media, then image and video quality is improved, but transmission costs and storage costs are increased
Solution Approach 1:
The patent extracts only the essential deblocking filter parameter information needed for reconstruction and transmits it separately from the main image data. By separating the parameter signaling from the full parameter transmission, the patent reduces the amount of data that needs to be transmitted and stored while maintaining the ability to reconstruct high-quality images and videos at the receiving end
Solution Approach 2:
The patent changes the parameter representation by using flag information to indicate the presence or absence of deblocking filter parameters. Instead of transmitting complete parameter sets regardless of need, the system dynamically adjusts parameter transmission based on whether the parameters are present in the bitstream, thereby optimizing transmission efficiency while preserving image quality
2Measurement precision
If deblocking filter parameter information is fully signaled in the bitstream, then deblocking filtering accuracy is improved, but data transmission volume is increased
Solution Approach 1:
The patent enables the decoding apparatus to self-determine whether deblocking filter parameters are present in the bitstream by checking flag information. The system serves itself by automatically adapting to the presence or absence of parameters without requiring external control signals, thereby reducing transmission overhead while maintaining filtering accuracy when parameters are available
Solution Approach 2:
The patent applies partial action by transmitting only the necessary deblocking filter parameter information rather than complete parameter sets. The flag-based approach allows the system to transmit parameters selectively - only when needed - thereby reducing data transmission volume while maintaining sufficient filtering accuracy for high-resolution content
Data Source
AI summary
A method by which a decoding device decodes an image, according to the present document, comprises the steps of: obtaining image information from a bitstream; generating a reconstructed picture of the current picture; deriving deblocking filter parameter information related to deblocking filter parameters on the basis of the image information; and performing deblocking filtering on the reconstructed picture on the basis of the deblocking filter parameters so as to generate a modified reconstructed picture.