Adaptive Cache Index Configuration for Motion Picture Processing
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Solution Overview
Problem
Current cache management systems experience high cache miss rates during motion compensation processes, especially when dealing with multiple reference pictures, leading to decreased system performance due to inefficient data retrieval from main memory.
Innovation Solution
A cache management system comprising an analysis module and a control module that generates cache miss analysis information and adjusts the index content configuration of the cache to reduce cache misses by optimizing the distribution of data across cache lines based on the analysis of horizontal, vertical, and time dislocation misses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a direct mapped cache is used to store reference data, then the cache structure is simple and fast, but cache miss rate increases when handling multiple reference pictures
Solution Approach 1:
The patent applies dynamics by making the cache index configuration adjustable and adaptive. The system dynamically modifies the index content configuration based on detected cache miss patterns, transitioning from a static direct-mapped cache to a dynamically reconfigurable cache that adapts to different reference picture access patterns, thereby resolving the contradiction between simple structure and high hit rate.
Solution Approach 2:
The patent changes the parameter of index content configuration to resolve the contradiction. By analyzing cache miss causes (horizontal dislocation, vertical dislocation, time dislocation) and adjusting the index field contents accordingly, the system optimizes cache mapping for multiple reference pictures while maintaining the speed benefits of direct-mapped cache structure.
2Reliability
If the cache size is increased to accommodate more reference data, then cache hit rate improves, but system cost and complexity increase
Solution Approach 1:
Instead of increasing cache size, the patent changes the index content configuration parameters to improve cache utilization efficiency. By optimizing how address bits are mapped to index fields based on observed access patterns, the system achieves better cache hit rates with the existing cache capacity, avoiding the complexity and cost of larger cache implementations.
Solution Approach 2:
The patent implements a feedback mechanism where cache miss information is analyzed and used to adjust the index configuration. This closed-loop approach allows the cache system to self-optimize based on actual usage patterns, improving hit rate without requiring additional hardware resources or increased cache size.
3Device complexity
If the index content configuration is fixed, then the cache structure is simple, but cache miss rate increases due to dislocation issues
Solution Approach 1:
The patent transforms the static index configuration into a dynamic one that adapts to different access patterns. The system detects dislocation misses (horizontal, vertical, time) and adjusts the index content configuration accordingly, enabling the cache to handle multiple reference pictures efficiently without requiring a completely complex restructure.
Solution Approach 2:
The patent performs preliminary analysis of cache access patterns to identify dislocation issues before they cause performance degradation. By detecting and addressing horizontal, vertical, and time dislocation misses in advance, the system proactively optimizes the index configuration to prevent future cache misses, rather than reacting after performance has already degraded.
Data Source
AI summary
A signal processing system for motion pictures includes a signal processing module, a cache, an analysis module and a control module. The signal processing module performs a signal processing process on motion picture data. The cache temporarily stores a set of reference data that is required for processing the motion picture during the signal processing process. The analysis module generates cache miss analysis information associated with the signal processing process and the cache. The control module determines an index content configuration of the cache according to the cache miss analysis information.