SPS Signaling for Inter-Layer Prediction in Image Decoding
Find Innovative SolutionsGenerate Solutions
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 increased amount of transmitted information, necessitating high-efficient image compression technology.
Innovation Solution
An image encoding/decoding method and apparatus that determines the presence of a video parameter set (VPS) referenced by a sequence parameter set (SPS) to derive inter layer prediction information, improving encoding/decoding efficiency by efficiently signaling the SPS and transmitting a bitstream.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If high-resolution and high-quality images are transmitted, then image quality is improved, but transmission cost and storage cost increase
Solution Approach 1:
The patent changes the parameter of image resolution and quality by using inter-layer prediction from a lower resolution layer to generate higher resolution predictions, allowing quality improvement without proportionally increasing the amount of transmitted information
Solution Approach 2:
The patent segments the image into different resolution layers (base layer and enhancement layers) where the base layer contains essential information and enhancement layers add detail, enabling selective transmission and processing of information at different quality levels
2Reliability
If sequence parameter set (SPS) information is fully signaled, then decoding accuracy is improved, but signaling complexity increases
Solution Approach 1:
The patent applies partial action by signaling inter-layer prediction information only when necessary (when VPS is present and sps_video_parameter_set_id > 0), rather than always signaling all possible parameters, thus reducing signaling complexity while maintaining decoding accuracy when needed
Solution Approach 2:
The decoding apparatus determines the presence of VPS and derives inter-layer prediction information autonomously based on the signaled parameters, without requiring explicit signaling of all prediction parameters, reducing complexity while maintaining functionality
Data Source
AI summary
An image encoding/decoding method and apparatus are provided. An image decoding method according to the present disclosure is performed by an image decoding apparatus. The image decoding method comprises determining whether a video parameter set (VPS) referenced by a sequence parameter set (SPS) is present, deriving information on inter layer prediction, based on the determination as to whether the video parameter set referenced by the sequence parameter set is present, and reconstructing an image based on the information on inter layer prediction.