Rectangular Slice Size Signaling for Efficient Image Encoding
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Solution Overview
Problem
The increasing demand for high-resolution and high-quality images leads to a significant increase in transmission and storage costs due to the rise in the amount of transmitted information, necessitating high-efficient image compression technologies.
Innovation Solution
An image encoding/decoding method and apparatus that selectively encodes size information of a slice, including width and height information in units of tile columns and rows, with the encoding/decoding efficiency improved by determining slice sizes based on whether the slice is the last tile column or row of a picture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If size information of all slices is encoded in the bitstream, then decoding accuracy is improved, but transmission cost and bitstream length increase
Solution Approach 1:
The patent extracts only the necessary size information for non-last slices from the bitstream, while the size of the last slice is implicitly determined by the picture dimensions and the sizes of preceding slices, thereby reducing the quantity of transmitted data while maintaining decoding accuracy
Solution Approach 2:
The last slice's size information is derived self-service from the picture parameters and previously decoded slice sizes, eliminating the need to explicitly encode and transmit this information in the bitstream
2Measurement precision
If size information of all slices is encoded in the bitstream, then decoding accuracy is improved, but storage cost increases
Solution Approach 1:
The patent extracts only the necessary size information for non-last slices from the bitstream, while the size of the last slice is implicitly determined by the picture dimensions and the sizes of preceding slices, thereby reducing the quantity of transmitted data while maintaining decoding accuracy
Solution Approach 2:
The last slice's size information is derived self-service from the picture parameters and previously decoded slice sizes, eliminating the need to explicitly encode and transmit this information in the bitstream
3Quantity of substance
If selective encoding of slice size information is performed, then transmission cost is reduced, but device complexity increases
Solution Approach 1:
The patent changes the encoding parameter strategy by conditionally encoding slice size information based on the slice's position (whether it is the last slice), using different encoding approaches for different parameter conditions to reduce overall bitstream length
Data Source
AI summary
Disclosed herein are an image encoding/decoding method and apparatus. An image decoding method performed by an image encoding apparatus may include acquiring size information indicating a size of a current slice corresponding to at least a portion of a current picture from a bitstream and determining the size of the current slice based on the size information.