Multi-Stream Audio Video Power Management via Stream Segmentation
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Solution Overview
Problem
Conventional power reduction techniques in digital devices, such as video players, are inadequate as they do not account for specific application contexts, leading to inefficient power conservation, especially when processing high-definition video and audio streams.
Innovation Solution
A method that allows digital audio/video devices to operate in multiple power consumption modes by selectively processing digital streams using different algorithms, where in reduced power mode, less computationally intensive processing is applied to auxiliary streams, while maintaining normal processing for primary streams, thereby reducing dynamic power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional power reduction techniques (lower frequency clock signals, shutting down circuit portions, reducing supply voltage) are applied to digital devices, then power consumption is reduced, but the techniques fail to deliver adequate power reduction for multi-stream audio/video processing because they do not account for specific application contexts
Solution Approach 1:
The patent segments the digital stream processing into primary streams and secondary streams, allowing different processing modes for each. Primary streams are processed in normal power mode while secondary streams are processed in reduced power mode, enabling differentiated power management based on stream importance rather than applying uniform power reduction to all circuits
Solution Approach 2:
The patent dynamically adjusts the processing mode for secondary streams based on detected power consumption modes. The system transitions between normal and reduced power processing for secondary streams according to available power resources, enabling adaptive power management that responds to changing power conditions while maintaining primary stream quality
2Manufacturing precision
If high definition video and audio streams are processed with full decoding and processing, then quality and feature set are improved, but dynamic power consumption by decoder hardware increases substantially
Solution Approach 1:
The patent applies different processing qualities to different streams: primary streams receive full-quality decoding and processing to maintain high video quality, while secondary streams receive reduced-quality processing with fewer decoding steps. This local differentiation of processing quality allows the system to maintain overall acceptable quality while reducing power consumption for less critical streams
3Adaptability or versatility
If multiple digital streams are processed simultaneously in normal mode, then all features and improvements are provided, but power consumption increases
Solution Approach 1:
The patent applies partial processing action to secondary streams by performing fewer decoding and processing steps compared to primary streams. This partial action provides basic functionality for secondary streams while consuming less power, allowing the system to offer multiple features simultaneously but with differentiated processing intensity based on power availability
Data Source
AI summary
A method of managing power consumption in a video device capable of displaying encoded multi-stream video is disclosed. Power reduction is achieved by limiting the amount of video and audio decoding and processing performed on at least some of the encoded streams, by taking particular application contexts into account. In a normal power consumption mode, audio/video data from all streams are decoded and digitally processed for output. In response to detecting a reduced power consumption mode, audio/video from at least some of the streams are processed in a modified manner to reduce power consumption.