Audio Content Switching Volume Fading Method
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Solution Overview
Problem
Content-presentation devices face issues with abrupt content switches, leading to audio artifacts due to discontinuities in audio signals, which can be mitigated by adjusting the volume settings during the transition periods.
Innovation Solution
Implementing a method where the content-presentation device fades out the first audio-content component's volume to zero over a first time interval and increases the second audio-content component's volume from zero over a second time interval, aligning with the switch times to minimize audible artifacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If abrupt content switching is implemented, then content presentation speed and productivity are improved, but audio artifacts and signal discontinuities occur
Solution Approach 1:
The system performs preliminary volume fading actions before the actual content switch occurs. By fading out the first audio content volume to zero and fading in the second audio content volume from zero during designated time intervals surrounding the switch time, the system prepares the audio signal in advance to avoid abrupt discontinuities and artifacts during the transition.
Solution Approach 2:
Volume fading acts as an intermediary mechanism between the first and second audio content signals. Instead of directly switching from one signal to another, the system uses volume modulation as an intermediate step that smoothly transitions the audio signal, eliminating the harsh discontinuity that would otherwise occur at the switch point.
2Object-generated harmful factors
If volume fading is applied during content transitions, then audio artifacts are reduced, but transition time increases
Solution Approach 1:
The system applies volume fading for specific durations (first time interval before switch time, second time interval after switch time) rather than continuously. By limiting the fading action to these specific partial time intervals surrounding the switch, the system reduces audio artifacts without unnecessarily extending the total transition time beyond what is required for the switch event itself.
Data Source
AI summary
In one aspect, a method includes receiving first content at a content-presentation device and presenting the first content, the first content comprising a first audio-content component. The content-presentation device may receive second content comprising a second audio-content component. The content-presentation device may determine a switch time at which to switch from presenting the first content to presenting the second content. During a first time interval prior to the switch time and ending at the switch time, the volume of the first audio-content component may be decreased to zero. At the switch time, the content-presentation device may switch from presenting the first content to presenting the second content. During a second time interval beginning at the switch time and ending at a second time after the switch time, the volume of the second audio-content component may be increased from zero to a non-zero volume level.