Panel Loudspeaker Signal Processing for Overamplitude Reallocation
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Solution Overview
Problem
Existing panel loudspeaker systems face challenges in reproducing high-quality sounds while minimizing process load, as they often require significant computational resources for overamplitude detection and may experience sound pressure level degradation due to overamplitude issues, leading to potential blur or distortion in video displays.
Innovation Solution
A signal processing device and method that demultiplexes encoded data to extract audio signals and overamplitude flags for panel loudspeakers, adjusts audio signals based on these flags, and allocates sound pressure levels to adjacent panel loudspeakers to prevent overamplitude, thereby reducing computational load and maintaining sound quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If overamplitude detection is conducted at the reproduction-side device, then overamplitude can be detected to prevent panel vibration, but computation resource is required and process delay may occur
Solution Approach 1:
The patent applies preliminary action by performing overamplitude detection at the encoding side before audio signal transmission. The encoding-side device detects whether overamplitude will occur and generates overamplitude flags in advance, which are then transmitted to the reproduction-side device. This eliminates the need for complex real-time detection at the reproduction side, reducing computational resource requirements and process delay while maintaining detection accuracy.
2Reliability
If signal level is suppressed when overamplitude is detected, then overamplitude in the panel can be prevented, but desired sound pressure level cannot be obtained and sound quality degrades
Solution Approach 1:
The patent applies dimensionality change by redistributing audio signal power across multiple spatial dimensions (multiple panel loudspeakers) instead of simply reducing power in a single dimension (signal level suppression). When overamplitude is detected in one panel loudspeaker, the system allocates its audio signal to adjacent panel loudspeakers, thereby maintaining overall sound pressure level and sound quality while preventing overamplitude in the affected panel.
3Reliability
If panel vibration occurs in dark part of video, then reflection light appears blurred and video blur becomes obtrusive, but sound reproduction quality may be maintained
Solution Approach 1:
The patent applies local quality by implementing spatially selective signal allocation. Instead of uniformly reducing signal levels across all panel loudspeakers, the system identifies specific panels experiencing overamplitude and selectively reallocates only their audio signals to adjacent panels. This localized approach prevents video blur in affected areas while maintaining audio output quality in other regions, thereby addressing both video display quality and audio output quality simultaneously.
Data Source
AI summary
The present technology relates to a signal processing device, a signal processing method, and a program for enabling reproduction of high-quality sounds with a low process load. The signal processing device includes a demultiplexing section that extracts encoded audio signals and overamplitude flags, which have been generated for a plurality of respective panel loudspeakers and each indicate whether overamplitude will occur in the corresponding panel loudspeaker, by demultiplexing encoded data, a decoding section that decodes the encoded audio signals, and an adjustment section that adjusts audio signals to be supplied to the plurality of panel loudspeakers on the basis of the overamplitude flags and audio signals resulting from the decoding. The present technology is applicable to an encoding device and a decoding device.