TV Audio Controller Speaker Segmentation Noise Reduction
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Solution Overview
Problem
Existing digital TVs lack the ability to control sound levels based on user preference, leading to unwanted sound output and difficulty in adjusting levels for specific speakers or program genres, such as foreign language programs where native speakers' pronunciation is important.
Innovation Solution
A video display apparatus with a sound level control function that includes a tuner, DeMux, sound data extractor, controller, and audio signal processor, allowing users to select sound adjustment modes to vary the sound levels of specific speakers or eliminate background noise through user interface settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the digital TV outputs sound according to the magnitude the user has set, then the user can control the overall sound level, but the user cannot control the sound level of specific speakers or program genres
Solution Approach 1:
The patent segments the audio signal into multiple speaker channels (e.g., speaker 1, speaker 2, speaker 3) and allows independent sound level control for each speaker. The controller divides the audio signal according to speaker information and applies different sound levels to each segment, enabling users to adjust individual speaker volumes while maintaining overall control.
Solution Approach 2:
The patent implements dynamic sound level adjustment based on program genre and speaker identity. The controller automatically varies sound levels in real-time according to the detected program type (e.g., news, entertainment, foreign language) and selected speaker, allowing the system to adapt to different viewing conditions and user preferences dynamically.
2Reliability
If the digital TV outputs every sound from the broadcast, then complete audio information is provided, but the user cannot eliminate unwanted background noises
Solution Approach 1:
The patent extracts and separates the desired speaker's audio signal from the mixed broadcast audio. The controller identifies the selected speaker's voice in the audio signal and extracts it for enhanced output, while suppressing or eliminating background noises and other speakers' voices. This allows users to focus on specific speakers while filtering out unwanted sounds.
3Measurement precision
If the user increases the audio level to hear native speakers clearly in foreign language programs, then pronunciation accuracy improves, but other sounds become too loud
Solution Approach 1:
The patent applies different sound levels to different speakers locally rather than uniformly increasing all audio. When a user selects a specific speaker (e.g., native speaker) for enhanced clarity, the controller increases the sound level only for that speaker's audio segment while maintaining or reducing the volume of other speakers and background sounds, achieving localized audio enhancement.
Data Source
AI summary
The present invention relates in general to an video display apparatus, more particularly, to an video display apparatus having an sound level control function according to program genre or speaker of a received broadcast program.