Display Audio Signal Processing with Frequency-Dependent Gain
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Solution Overview
Problem
Conventional audio systems, such as home-theater systems, face challenges in providing realistic sound and surround sound effects due to space limitations and the complexity of cable connections, and alternatives like sound bars and headphones struggle to accurately process and distribute audio signals to achieve comprehensive sound rendering, especially in varying listening environments.
Innovation Solution
A display apparatus equipped with omnidirectional speakers on one side and directional speakers on the back, which use a signal processor to generate and adjust channel gains in the frequency domain, reducing the separation of the auditory image and providing a more natural sound experience by varying the channel gain based on frequency, thus enhancing the realism and depth of sound.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If virtualization technique is applied during sound rendering, then the sound can be output through limited speaker units, but the acoustic effects are limited due to variations in body information and listening environments
Solution Approach 1:
The patent applies local quality by adjusting the channel gain of specific frequency components (particularly high frequencies above 2kHz) differently from other frequencies. This frequency-selective gain adjustment compensates for environmental variations and body information differences, providing consistent acoustic effects across different listening conditions without requiring full virtualization techniques.
2Device complexity
If loudspeakers are mounted on the front bezel of the display panel, then the audio platform is integrated, but the position of the auditory image is restricted to inside the front display
Solution Approach 1:
The patent uses frequency-based dimensionality to overcome spatial restrictions. By adjusting the channel gain of high-frequency components (above 2kHz) independently, the system creates virtual sound sources that can be positioned in different spatial locations, effectively adding an auditory dimension that transcends the physical front-bezel speaker placement.
3Adaptability or versatility
If head-related transfer function customizing technique is employed, then personalized sound experience is achieved, but physical limits prevent constant acoustic effects due to system specifications and additional customization requirements
Solution Approach 1:
The patent changes the parameter of channel gain specifically for high-frequency components (above 2kHz) to achieve personalized sound effects. This parameter adjustment provides adaptability to different users and environments without requiring complex HRTF customization, system specification changes, or additional customization procedures.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively reduces the separation of the auditory image and provides a more natural and immersive sound experience by adjusting channel gains according to frequency, improving sound quality and realism in environments where traditional home-theater systems are not feasible.
Implementation Method 1
a frequency converter configured to generate channel signals of a frequency domain by converting the generated two or more channel signals through frequency conversion
Implementation Method 2
a directional speaker configured to reproduce a rendered channel signal, among the rendered two or more channel signals, as audible sound
Data Source
AI summary
An apparatus for outputting an audio signal includes: a channel processor configured to generate two or more channel signals from audio data; a signal processor configured to render the generated two or more channel signals; and a directional speaker configured to reproduced a rendered channel signal as an audible sound. The signal processor may include a frequency converter configured to generate a channel signal of a frequency domain by converting the generated two or more channel signals through frequency conversion, and a re-panner configured to change a channel gain of at least one of the generated channel signals by as much as an adjustment value for the channel gain, wherein the adjustment value is monotonically changed as a frequency of the channel signal of the frequency domain increases.