Mobile Device Chip Power Saving Audio Playback DMA Circuit
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Solution Overview
Problem
Current mobile devices face significant challenges in reducing power consumption during audio playback, with additional multimedia chips increasing costs and existing power management methods offering only minimal reductions in power usage.
Innovation Solution
A mobile device chip incorporating a main processor, a multimedia processor, and a direct memory access (DMA) circuit, which operates in a power-saving mode by reducing clock signal frequency and activating the multimedia processor to handle audio playback independently, thereby minimizing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If an additional multimedia chip is added to reduce power consumption, then power usage during audio playback is reduced, but the cost of the mobile phone is highly increased
Solution Approach 1:
The main processor is designed to perform multiple functions including both general computing tasks and audio playback processing. By integrating audio processing capabilities into the main processor, the system eliminates the need for a separate multimedia chip while maintaining the ability to handle audio playback efficiently with reduced power consumption.
2Device complexity
If power management is improved without additional multimedia processor, then cost is reduced, but the reduced power consumption is very small and power wastage is still very considerable
Solution Approach 1:
The system dynamically switches between different operational modes: normal mode where the main processor handles all tasks, and power-saving mode where the multimedia processor is activated specifically for audio playback. This dynamic adaptation allows the system to optimize power consumption based on the current operational requirements without permanently increasing device complexity.
Solution Approach 2:
A clock control unit is introduced as an intermediary component that manages clock signal distribution between the main processor and multimedia processor. This mediator enables efficient coordination between processors, allowing the system to activate only the necessary processing unit for audio tasks while maintaining cost-effectiveness by avoiding additional multimedia chips.
3Use of energy by moving object
If clock signal frequency is reduced to save power, then power consumption is reduced, but processing speed is slowed down
Solution Approach 1:
The processing system is segmented into two independent processors: the main processor for general computing tasks and the multimedia processor for audio-specific operations. This segmentation allows each processor to operate independently with optimized clock frequencies - the main processor maintains high speed for computing tasks while the multimedia processor can operate at lower frequencies specifically for audio playback, thereby reducing overall power consumption without compromising processing speed for different task types.
Data Source
AI summary
A mobile device chip is provided. The mobile device chip includes a main processor, a multimedia processor, and a direct memory access (DMA) circuit. The multimedia processor is electrically coupled to the main processor. The DMA circuit accesses storage, and the DMA circuit is electrically coupled to the multimedia processor. When the mobile device chip operates in a normal mode, the main processor provides file accessing information of at least part of an audio file stored in the storage to the multimedia processor. When the mobile device chip operates in a power-saving mode, the multimedia processor obtains the data of the at least part of the audio file stored in the storage through the DMA circuit according to the file accessing information provided by the main processor.