Adaptive Frame/Field Reference Index Assignment in MBAFF
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In Macroblock Adaptive Frame/Field Coding (MBAFF), the existing methods face challenges in determining the maximum number of reference indices and assignment commands for both frame and field coding, leading to inadequate reference index determination.
Innovation Solution
A moving picture coding method that adaptively switches between frame and field coding on a block-by-block basis, where frame reference indices are used to assign field reference indices, with specific values assigned based on field parity, allowing for effective use of frame reference indices in field coding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If frame reference indices are used for field coding in MBAFF, then coding efficiency is improved, but the determination of maximum number of reference indices becomes complex
Solution Approach 1:
The patent applies universality by making frame reference indices serve dual purposes: they function as frame reference indices when frame coding is used, and as field reference indices when field coding is used. This multi-functionality eliminates the need for separate field reference indices, simplifying the reference index determination while maintaining coding efficiency in MBAFF.
Solution Approach 2:
The patent changes the parameter interpretation of reference indices based on the coding mode. By changing the parameter from frame-based to field-based reference indexing when switching to field coding, the system can reuse the same reference index structure for both coding modes, resolving the complexity of determining separate maximum numbers of reference indices.
2Measurement precision
If separate field reference indices are determined, then field coding accuracy is improved, but device complexity increases
Solution Approach 1:
The patent makes the frame reference indices universal by enabling them to serve as field reference indices when field coding is applied. This eliminates the need for separate field reference indices while maintaining the accuracy required for field coding, as the same reference index mechanism is adapted to work with field-based temporal redundancy reduction.
Solution Approach 2:
The patent uses the frame reference indices as an intermediary that mediates between the frame coding structure and field coding requirements. By interpreting the same reference indices differently based on the coding mode, the system avoids the complexity of managing separate reference index sets while achieving field coding accuracy.
3Productivity
If reference indices are assigned based on field parity, then field coding efficiency is improved, but the complexity of index assignment increases
Solution Approach 1:
The patent applies local quality by assigning field reference indices based on field parity (even or odd fields). This localized differentiation allows efficient field coding by matching reference fields with appropriate parity, while the overall system complexity is managed by using a unified reference index assignment mechanism that adapts to local field requirements.
Data Source
AI summary
A moving picture coding method for coding a picture with switching between frame coding and field coding adaptively on a block-by-block basis includes: determining the maximum number of reference indices for field coding for specifying fields which are to be referred to at the time of field coding, using the maximum number of reference indices for frame coding for specifying frames which are to be referred to at the time of frame coding; and assigning to fields the reference indices for field coding for specifying fields which are to be referred to at the time of field coding, within a range of the determined maximum number thereof, using the reference indices for frame coding for specifying frames which are to be referred to at the time of frame coding.