POC Derivation Using Non-Reference Flags in Video Coding
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Solution Overview
Problem
The increasing demand for high-resolution, high-quality images and videos, particularly in virtual reality and augmented reality, leads to higher data transmission and storage costs due to the increased amount of information required, necessitating a more efficient compression technique.
Innovation Solution
A method and apparatus for enhancing video/image coding efficiency by signaling picture order count (POC) information and non-reference picture flags, allowing for deriving a previous picture in decoding order to optimize compression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high resolution and high quality image/video are transmitted, then image quality is improved, but transmission cost increases
Solution Approach 1:
The patent extracts and transmits only the essential POC information and non-reference picture flags needed for decoding, rather than transmitting complete reference picture data. This selective extraction of critical information reduces transmission bandwidth requirements while maintaining the ability to reconstruct high-quality images and videos.
Solution Approach 2:
The patent changes the parameter representation by using POC (Picture Order Count) values and binary flags instead of transmitting full reference picture data. This parameter transformation enables efficient compression where complex visual information is represented through compact numerical and binary parameters, significantly reducing transmission costs while preserving image quality.
2Measurement precision
If more information is transmitted for high resolution images, then image quality is improved, but storage cost increases
Solution Approach 1:
The patent extracts only the essential POC information and non-reference picture flags from the complete video data structure. By storing only these critical parameters rather than redundant reference picture information, the system achieves efficient storage of high-quality video content with reduced space requirements.
Solution Approach 2:
The patent transforms complex video data into compact parameter representations using POC values and binary flags. This parameter encoding scheme allows high-resolution video to be stored efficiently by representing visual information through concise numerical and binary parameters rather than raw pixel data, significantly reducing storage costs.
3Productivity
If reference pictures are used for compression, then compression efficiency is improved, but complexity of managing reference pictures increases
Solution Approach 1:
The patent extracts only the essential identifying information (POC values and non-reference flags) from reference pictures, rather than managing complete reference picture data. This extraction approach maintains compression efficiency by preserving the necessary reference information while eliminating the complexity of managing full reference picture buffers and their associated metadata.
Solution Approach 2:
The patent transforms reference picture management from handling complex picture data structures to managing simple numerical parameters (POC values) and binary flags. This parameter simplification reduces the computational and memory complexity of reference picture management while maintaining the compression benefits of inter-picture referencing.
Data Source
AI summary
According to the disclosure of the present document, image information acquired via a bitstream includes POC information, and a non-reference picture flag related to whether a picture is not used as a reference picture. A POC value of a current picture is derived on the basis of the POC information, and the POC information includes POC information of a previous picture in decoding order for the current picture. The previous picture in the decoding order for deriving the POC value of the current picture may be limited to a picture where a value of the non-reference picture flag is 0. Accordingly, an incorrect POC value can be prevented from being derived in video/image coding.