Adaptive Complexity Video Decoder for Power-Constrained Devices
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Solution Overview
Problem
Portable electronic devices face challenges in decoding complex video algorithms and high-resolution video playback due to insufficient computing capability and high power consumption, necessitating efficient and cost-effective video decoders that can maintain acceptable quality.
Innovation Solution
An adaptive complexity video decoder and audio/video playback system that dynamically manage decoding complexity based on processing capability, reducing power consumption and complexity by operating components according to the resolution of reconstructed frames rather than original frames, and adjusting audio playback to synchronize with video decoding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the decoding algorithm complexity is increased to handle high-resolution video, then the video decoding quality is improved, but the power consumption and processing requirement increase
Solution Approach 1:
The patent implements dynamic complexity management where the video decoder adapts its processing complexity based on real-time conditions. The system dynamically switches between different decoding modes (e.g., high-quality mode for stationary scenes, low-power mode for moving scenes) to balance between decoding quality and power consumption, resolving the contradiction between maintaining high video quality and reducing energy usage.
Solution Approach 2:
The system changes operational parameters such as block size, transform size, and quantization precision adaptively. By adjusting these parameters based on scene characteristics and processing capability, the decoder maintains acceptable video quality while reducing computational complexity and power consumption when high precision is not required.
2Productivity
If the processing circuits operate at highest frequency to improve decoding speed, then the video playback performance is improved, but the power consumption increases
Solution Approach 1:
The system dynamically adjusts the operating frequency of processing circuits based on the current decoding task requirements. Instead of running at maximum frequency continuously, the system scales frequency according to scene complexity and decoding mode, maintaining productivity when needed while reducing power consumption during low-demand periods.
Solution Approach 2:
The decoder employs periodic analysis of video content to determine when high-performance decoding is necessary versus when power-saving mode is appropriate. This periodic evaluation allows the system to switch between high and low processing states, balancing productivity and energy efficiency.
3Manufacturing precision
If the decoder processes original frame resolution to maintain quality, then the video quality is improved, but the device complexity and cost increase
Solution Approach 1:
The patent applies different processing qualities to different regions and time periods. Rather than consistently processing at original resolution, the system applies high-quality decoding only when and where necessary (e.g., static scenes, key frames), while using simplified processing for dynamic regions and intermediate frames, thereby reducing overall device complexity requirements.
Solution Approach 2:
The system dynamically adapts the processing quality level based on scene characteristics and display requirements. By switching between high-quality and simplified decoding modes, the system maintains acceptable video quality without requiring the decoder to be designed for always processing at original resolution, thus reducing inherent device complexity.
Data Source
AI summary
A method for adaptively performing video decoding includes: performing decoding complexity management based upon parameter representing processing capability related to the adaptive complexity video decoder, in order to determine whether to reduce decoding complexity of at least one component of a plurality of components within an adaptive complexity video decoder; and selectively reducing decoding complexity of a portion of components within the adaptive complexity video decoder. An associated adaptive complexity video decoder and an associated adaptive audio/video playback system are also provided. In particular, the adaptive complexity video decoder includes a plurality of components and a decoding complexity manager. When needed, the decoding complexity manager delays audio playback of audio information.