Panoramic Video Boundary Fill Adaptation
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Solution Overview
Problem
Panoramic videos require efficient compression techniques due to their large data volume and high distortion, which is not adequately addressed by traditional video encoding methods, leading to difficulties in transmission and storage.
Innovation Solution
The method employs multi-mode boundary fill techniques during inter-frame prediction in panoramic video encoding and decoding, adaptively selecting boundary fill methods based on reference sample coordinates to optimize image boundary fill and improve compression efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional video encoding methods are used for panoramic videos, then the encoding process is simple, but the compression efficiency is insufficient due to large data volume and high distortion
Solution Approach 1:
The patent segments the panoramic video encoding process into multiple modes (intra-mode and inter-mode boundary fill methods). The image is divided into current image blocks that are processed using different encoding strategies based on their position and characteristics, allowing optimized compression for each segment while maintaining overall simplicity
Solution Approach 2:
The patent applies different boundary fill methods locally based on the position of reference samples. When reference samples are within the reference image, one method is used; when they extend beyond boundaries, another method is applied. This local differentiation improves compression efficiency without significantly increasing overall system complexity
2Quantity of substance
If block encoding is used to reduce transmission area, then transmission requirements are reduced, but encoding efficiency decreases
Solution Approach 1:
The patent dynamically adapts the boundary fill method based on the coordinates of reference samples. The encoding process automatically switches between different fill methods (horizontal, vertical, or planar) depending on the specific block position and reference sample locations, optimizing the balance between transmission data volume and encoding efficiency for each block
3Productivity
If encoding block size is increased to improve encoding efficiency, then encoding efficiency improves, but transmission area increases leading to larger data volume
Solution Approach 1:
The patent changes the boundary fill parameters adaptively based on reference sample coordinates. By adjusting the fill method parameter (选择不同的边界填充方法) according to the specific block characteristics, the system achieves better compression ratios for larger blocks without proportionally increasing transmission data volume
Data Source
AI summary
Methods and devices are disclosed for panoramic video coding and decoding based on multi-mode boundary fill. If a predicted image block of a current image block is obtained by inter-frame prediction. The inter-frame prediction includes a boundary fill step of adaptively selecting a boundary fill method according to coordinates of a reference sample when the reference sample of a pixel in the current image block is outside the boundary of a corresponding reference image, to obtain a sample value of the reference sample. The panoramic video encoding and decoding method and device based on multi-mode boundary fill in the present invention make full use of the characteristic that horizontal image contents in a panoramic video are cyclically connected to optimize an image boundary fill method, such that the encoding can adaptively select a more reasonable boundary fill method according to the coordinates of a reference sample, thereby improving compression efficiency.