TV Gain Management Unit Using Lookup Table for Channel Audio
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Solution Overview
Problem
Traditional TV sets require frequent manual adjustments of amplifier gain values due to varying audio energy outputs across channels, leading to user inconvenience and increased complexity and cost with existing automatic compensation systems.
Innovation Solution
A TV set with a gain management unit that includes a central processing unit, gain control unit, tuner, storage unit, and command input unit, which automatically adjusts and updates gain values by reading predetermined values from a setting table, amplifying audio signals, and calculating integrated gain values based on user inputs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If automatic gain compensation is implemented, then manual adjustment operations are reduced, but device complexity and cost increase
Solution Approach 1:
The system pre-calculates and stores integrated gain values for each channel in a lookup table during manufacturing or initial setup. When a channel is selected, the pre-computed gain value is directly applied without requiring real-time audio analysis or complex calculations, thus achieving automatic gain management with minimal additional hardware complexity.
Solution Approach 2:
The TV set automatically reads the selected channel number, retrieves the corresponding pre-stored integrated gain value from the lookup table, and applies it to the audio amplifier without user intervention. This self-service mechanism eliminates manual adjustment operations while avoiding the complexity of real-time audio energy detection and calculation circuits.
2Measurement precision
If complex automatic compensation systems are used, then gain management accuracy improves, but manufacturing cost increases
Solution Approach 1:
Integrated gain values are pre-calculated and stored in a simple lookup table during manufacturing. This approach achieves accurate gain management for each channel without requiring complex real-time processing hardware, thereby reducing manufacturing costs while maintaining precision.
Solution Approach 2:
Instead of implementing complex real-time audio analysis and calculation systems, the invention uses a simplified copy of the desired outcome - a lookup table containing pre-computed gain values that replicate the effect of complex real-time processing with minimal hardware.
3Measurement precision
If real-time audio energy calculation is performed, then dynamic gain adjustment accuracy improves, but processing time and complexity increase
Solution Approach 1:
The system performs gain value calculations in advance and stores them in a lookup table. When a channel is selected, the pre-computed value is instantly retrieved without requiring real-time audio energy calculation, thus achieving accurate gain adjustment with minimal processing time and no user-perceptible delay.
Solution Approach 2:
The system prepares and stores all necessary gain values in advance during manufacturing or initialization. This beforehand cushioning ensures that when a channel is selected, the appropriate gain value is immediately available without requiring time-consuming real-time calculations, thus eliminating processing delays.
Data Source
AI summary
The present invention relates to method for managing gain value for each channel of a TV set, includes steps: signaling a tuner to receive broadcasting signals of the channel in response to a channel selection command; reading a predetermined gain value of the channel from a setting table; amplifying and outputting audio signals extracted from the broadcasting signals of the channel according to the predetermined gain value of the channel; signaling a gain control unit to adjust a current gain value to an adjusted gain value if receiving a gain adjustment command; amplifying the audio signals of the channel according to the adjusted gain value; calculating an integrated gain value according to the adjusted gain value and the predetermined gain value; and updating the predetermined gain value of the channel using the integrated gain value. The present invention also provides a corresponding TV set.