Abstract
During the COVID-19 pandemic, smart home requirements have shifted toward entertainment at home. The purpose of this research project was therefore to develop a robotic audio system for home automation. High-end audio systems normally refer to multichannel home theaters. Although multichannel audio systems enable people to enjoy surround sound as they do at the cinema, stereo audio systems have been popularly used since the 1980s. The major shortcoming of a stereo audio system is its narrow listening area. If listeners are out of the area, the system has difficulty providing a stable sound field. This is because of the head-shadow effect blocking the high-frequency sound. The proposed system, by integrating computer vision and robotics, can track the head movement of a user and adjust the directions of loudspeakers, thereby helping the sound wave travel through the air. Unlike previous studies, in which only a diminutive scenario was built, in this work, the idea was applied to a commercial 2.1 audio system, and listening tests were conducted. The theory and the simulation coincide with the experimental results. The approximate rate of audio quality improvement is 31%. The experimental results are encouraging, especially for high-pitched music.
Highlights
Autonomous Technology for 2.1Artificial intelligence (AI) enables electronic devices to perform tasks that typically require human intelligence
The proposed autonomous audio system cooperating with a crosstalk cancellation should show more merits, because most crosstalk cancellation systems were developed for a fixed listening location
The Massachusetts Institute of Technology (MIT) Media Lab measured transform functions with maxbit sequences having autocorrelation functions equal to a Dirac delta with an offset. If it is imum length (MLS) in an anechoic chamber.◦ maximum length sequences (MLS) signals are binary bit seassumed that hsequences αL and hαR are a pair of head-related impulse responses (HRIRs) from the angle α, the mix of a piece of stereo
Summary
Artificial intelligence (AI) enables electronic devices to perform tasks that typically require human intelligence. Smart home technology tends to focus on lighting, energy usage, and security; the concept of a fully integrated, semiautonomous entertainment system is appealing. Audio quality distortion occurs when electrodynamic speaker drivers do not direct sound to the listener. The use of a robotic mechanism enables the system to change the positions and directions of loudspeakers automatically, thereby generating the best listening area where the head of the listener is located. Unlike in the work of Kona et al [4], who used a replica monophonic speaker, robot toy, and mini smart house model, in this study, the stereophonic system was implemented in a real acoustic environment, and human participants were invited to take listening tests. The proposed autonomous audio system cooperating with a crosstalk cancellation should show more merits, because most crosstalk cancellation systems were developed for a fixed listening location. The digital filters for a crosstalk cancellation are not yet ready for real-time processing due to the limitations of the low-cost hardware
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