Orientation-Aware Audio Soundstage Mapping for Mobile Devices
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Modern mobile devices typically operate in mono sound mode when using the loud speaker, limiting the audio experience for users playing stereo sound content, as the auxiliary speaker is turned off in this mode, and existing orientation-aware technologies primarily focus on display adjustments rather than audio enhancements.
Innovation Solution
A mobile device with orientation-aware audio mapping capability, utilizing an auxiliary and loud speaker, along with a processor and sensor, to dynamically send mapped audio outputs as mono or stereo signals, with customizable power distribution between the speakers based on device orientation, and a crossover to divide audio signals into channels for optimal distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the auxiliary speaker is turned off when the loud speaker is operating, then the device operates in mono sound mode which simplifies audio processing, but the user experience is degraded when playing stereo sound content
Solution Approach 1:
The system dynamically switches between mono and stereo modes based on device orientation. When the device is held horizontally, the system activates stereo mode by routing audio signals to both the loud speaker and auxiliary speaker. When held vertically, it switches to mono mode using only the loud speaker. This dynamic adaptation resolves the contradiction by allowing the system to simplify processing when needed while enabling stereo capability when appropriate.
Solution Approach 2:
The system changes the audio output configuration parameter based on orientation detection. The processor receives orientation information from sensors and adjusts the audio routing parameters accordingly - switching between mono and stereo output modes. This parameter change allows the system to adapt its audio processing complexity and stereo capability based on actual usage conditions.
2Adaptability or versatility
If the device uses built-in sensors for orientation awareness, then the device can respond dynamically to changing orientation, but the response is currently limited to display adjustments rather than audio enhancements
Solution Approach 1:
The existing orientation sensing capability, originally designed solely for display orientation adjustments, is extended to also control audio output configuration. The same sensors that detect device orientation now trigger both display reorientation and audio mode switching (mono/stereo). This multi-functional use of the sensing system enhances audio experience quality without adding separate sensing hardware.
3Adaptability or versatility
If the processor sends mapped audio output to both aux speaker and loud speaker for stereo sound, then stereo audio capability is enhanced, but the device complexity increases
Solution Approach 1:
The audio signal processing is segmented into different routing paths based on orientation. The processor divides the audio output into stereo channels when in horizontal orientation, routing left and right channels to appropriate speakers. When in vertical orientation, the system segments the output to use only the loud speaker in mono mode. This segmentation approach manages complexity by activating full stereo processing only when necessary.
Data Source
AI summary
A mobile device with orientation aware audio mapping capability is disclosed. The mobile device has an aux speaker, a loud speaker, a sensor for device orientation detection, and a processor (or processors) coupled to the sensor and the speakers. Depending on the device orientation, the processor sends a mapped audio output to the speakers. The mapped audio output may be a mono audio signal or a stereo audio signal. The stereo audio output signal may be a stereo audio output signal with a balanced or biased audio power distribution between the aux speaker and the loud speaker.