Speaker Bar Audio Processing for Bass and Spatial Enhancement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Portable electronics, such as laptops, often use small speaker bars that cannot produce surround sound effects or sufficient bass, resulting in poor sound quality due to their small form factor and inexpensive speakers with uneven frequency response and distortions.
Innovation Solution
A speaker bar controller processes audio data using a spatial enhancement system with a head-related transfer function filter and harmonics generator to enhance bass, equalize frequency response, and provide virtualization for a more immersive sound experience, even with small speakers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If small speakers are used in portable electronics to maintain compact form factor, then device portability is improved, but sound quality and bass response deteriorate
Solution Approach 1:
The patent applies parameter changes by processing audio signals through digital signal processing techniques including equalization to adjust frequency response, harmonics generation to synthesize bass frequencies, and spatial enhancement to create virtual surround sound. These parameter transformations allow small speakers to produce sound characteristics that mimic larger speaker systems.
Solution Approach 2:
The patent replaces the mechanical limitation of small speaker physical size with electronic/digital processing solutions. Instead of relying on larger physical speaker components to produce bass and surround sound, the system uses digital signal processing, harmonics generation, and virtualization algorithms to achieve similar acoustic effects from compact speakers.
2Ease of manufacture
If inexpensive speakers are used to reduce cost, then manufacturing cost is improved, but frequency response uniformity and distortion characteristics worsen
Solution Approach 1:
The patent implements feedback through equalization processing that compensates for the uneven frequency response characteristics of inexpensive speakers. By analyzing the speaker's actual frequency response and applying corrective filtering, the system compensates for manufacturing deficiencies and achieves more uniform sound output without requiring higher-quality (more expensive) speaker components.
3Reliability
If stereo audio data is processed through head-related transfer function filters for surround channel, then spatial immersion is improved, but processing complexity increases
Solution Approach 1:
The patent applies segmentation by separating audio processing into distinct channels and processing stages. Stereo channels are processed differently from surround channels, with HRTF filters applied specifically to surround channels to create spatial immersion. This segmented approach allows complex processing to be applied selectively where needed while maintaining simpler processing for other channels.
Data Source
AI summary
A sound reproduction apparatus comprising a loudspeaker bar having a plurality of loudspeakers. A loudspeaker bar controller coupled to the loudspeaker bar for processing audio data for the plurality of loudspeakers, the loudspeaker bar controller comprising a spatial enhancement/virtualization system for receiving a surround channel of audio data and processing the surround channel of audio data with a spatial generation/virtualization filter, wherein a left stereo channel of audio data and a right stereo channel of audio data are not processed with the head related transfer function filter. Bass is enhanced for small speakers which are not able to produce bass frequencies.