Multi-Channel Audio Level Control With Automatic Auxiliary Balancing
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Solution Overview
Problem
Existing audio control systems for multiple channels require users to manually adjust sound levels for each channel, making it impractical to manage multiple audio channels simultaneously, especially during events like commercial breaks or changes in content.
Innovation Solution
A device with user-controlled selection means for a main channel and automatic level adjustment means for auxiliary channels, allowing the user to control only the main channel to achieve a suitable overall sound level, reducing user effort and the number of control keys needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual control keys are provided for each audio channel, then each channel can be controlled independently, but the device complexity and number of control keys increase significantly
Solution Approach 1:
A single control key is designed to perform multiple functions: it can select different audio channels and adjust their volume levels sequentially. When the user presses the key, it cycles through channels (P1, P2, P3) and automatically adjusts each channel's volume in turn, allowing one key to replace what would traditionally require multiple dedicated keys for each channel.
Solution Approach 2:
The control system dynamically changes its behavior based on the current state. The single control key adapts its function depending on which channel is currently selected and what the current volume levels are, providing context-dependent control that reduces the need for static, dedicated controls for each channel.
2Ease of operation
If separate volume control is provided for each channel, then precise individual control is achieved, but user effort and time required for adjustment increase
Solution Approach 1:
The system pre-establishes volume relationships between channels. When a user selects a main channel, the system automatically determines appropriate volume levels for auxiliary channels based on predetermined relationships, eliminating the need for users to manually adjust each channel's volume from scratch.
Solution Approach 2:
The system provides automatic feedback control where the volume of auxiliary channels is continuously adjusted based on the selected main channel's volume level. This creates a self-regulating system that maintains appropriate volume balance without requiring continuous manual intervention.
3Device complexity
If all channels are given equal volume control, then simplicity is maintained, but interference between channels increases and content-specific adjustment is lost
Solution Approach 1:
Different volume treatment is applied to different channels based on their role. The main channel receives full volume treatment while auxiliary channels have their volumes automatically reduced relative to the main channel. This localized differentiation reduces interference while maintaining overall system simplicity.
Solution Approach 2:
The system dynamically changes volume parameters based on channel selection. When a main channel is selected, the system adjusts the volume parameter of auxiliary channels relative to it, creating content-specific volume relationships that reduce interference without requiring complex control structures.
Data Source
AI summary
A device (1) is arranged for controlling the sound levels of a group of audio channels including a user selected main channel (MC) and at least one auxiliary channel (AC1; AC2). The audio channels can be rendered simultaneously. The device comprises automatic level adjustment means (12, 13) for adjusting the sound level of the at least one auxiliary channel relative to the main channel. The level adjustment means (12, 13) may be arranged for adapting the respective sound levels to the content or signal characteristics of each associated audio channel.