Video Decoder Mode Switching for Lossy Reference Frames
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Solution Overview
Problem
Existing video decoding technologies face challenges in balancing power consumption and visual quality, particularly when using reference frames for decoding, as lossless compression methods consume more power without significant visual impact, while lossy compression may degrade image quality.
Innovation Solution
Implementing a video decoder that operates in two modes: a first mode using lossless reference frames for optimal quality and a second mode using lossy reference frames for power savings, with techniques to minimize visual degradation, such as lossy compression of chroma components and toggling between modes to maintain image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If lossless compression is used for reference frames, then visual quality is maintained, but power consumption increases
Solution Approach 1:
The video decoder dynamically switches between first mode (lossless reference frames) and second mode (lossy reference frames) based on power availability and quality requirements. The system adapts its operation mode in real-time, transitioning from lossless to lossy compression when power is constrained, and vice versa when quality is prioritized, resolving the contradiction between power consumption and visual quality maintenance
Solution Approach 2:
The system changes the compression parameter of reference frames from lossless to lossy based on operational conditions. By adjusting the compression level parameter dynamically, the system can operate in first mode with lossless compression for high quality, or switch to second mode with lossy compression for power savings, thereby resolving the technical contradiction between these two opposing requirements
2Use of energy by moving object
If lossy compression is used for reference frames, then power consumption is reduced, but visual quality degrades
Solution Approach 1:
The video decoder implements dynamic mode switching between first mode (lossless) and second mode (lossy) based on real-time power and quality requirements. When power consumption needs to be reduced, the system transitions to second mode using lossy reference frames, and can switch back to first mode when quality is prioritized, dynamically resolving the contradiction between power savings and quality maintenance
Solution Approach 2:
The system adjusts the compression parameter of reference frames dynamically, changing from lossless to lossy compression based on operational conditions. By modifying this parameter, the system achieves power reduction through lossy compression when needed, while maintaining the ability to revert to lossless compression for quality-critical operations, thus resolving the technical contradiction
Data Source
AI summary
A device for decoding video data includes an integrated circuit (IC) comprising a video decoder, and a memory that is external to the IC and coupled to the IC. The video decoder is configured to in a first mode, decode a first frame based on a first reference frame stored in the memory, and in a second mode, decode a second frame based on a second lossy reference frame, wherein the second lossy reference frame is generated based on decompression of a lossy compressed reference frame.