LED Matrix Synchronization with MIDI Audio Data
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Solution Overview
Problem
Existing electronic equipment face challenges in synchronizing light emission with audio playback due to the large data size of waveform music files, which can lead to prolonged transmission times and increased processing loads, especially when using infrared wireless microphones or MIDI files for controlling light intensity.
Innovation Solution
The integration of a light emitting device and an audio output unit within electronic equipment, where the audio output unit refers to a music file describing music data, allowing the control unit to analyze and synchronize light emission with audio playback without requiring dedicated data for light control, using a matrix array of LEDs and pulse width modulation to achieve synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If waveform music data is transmitted to electronic equipment, then audio playback quality is improved, but data transmission time and processing load increase significantly
Solution Approach 1:
The patent extracts only the essential audio information from complete waveform data by using MIDI format, which contains only note on/off timing, pitch, and volume information rather than full waveform data. This extraction approach maintains sufficient audio playback quality while dramatically reducing data transmission time and size.
Solution Approach 2:
Instead of transmitting complete waveform data and then processing it, the patent inverts the approach by transmitting only essential musical event information (MIDI data) and generating the audio output from these compressed instructions, thereby achieving efficient transmission without sacrificing playback functionality.
2Measurement precision
If waveform music data is used for light control, then synchronization accuracy is improved, but device complexity and processing requirements increase
Solution Approach 1:
The patent extracts only the timing and intensity information needed for light synchronization from complete audio data by using MIDI event timestamps and volume values. This extraction eliminates the need for complex real-time waveform processing while maintaining precise synchronization control for light emitting devices.
Solution Approach 2:
The patent uses MIDI data as a simplified copy or representation of full audio waveform data, containing only the essential musical event information needed for synchronization purposes. This copying approach reduces processing complexity while preserving the temporal and intensity information required for accurate light control.
3Measurement precision
If dedicated control data for light emission is created separately, then light control precision is improved, but data transmission volume and processing load increase
Solution Approach 1:
The patent makes the MIDI data universal by using it for both audio playback control and light emission control simultaneously. The same MIDI event information (timing, pitch, volume) serves dual purposes, eliminating the need for separate dedicated control data and thereby reducing overall data transmission volume while maintaining precise control for both functions.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enables efficient synchronization of light emission with audio playback, reducing processing loads and data transmission volume, while providing audiovisual entertainment by controlling LEDs in response to music data, such as MIDI files, without the need for extra control data, thus enhancing user experience.
Implementation Method 1
electronic equipment provided with the function of controlling light emission from the light emitting devices
Implementation Method 2
an audio output unit which outputs audio by referring to a music file describing music data
Data Source
AI summary
Electronic equipment includes a processing unit which controls light emission from LEDs by referring to music data described in a music file such as a MIDI file. The processing unit controls light emission from the LEDs by detecting the occurrence of sound described in the music file. Light emission from the LEDs may be controlled in accordance with tone data and/or a track number included in the music file. Alternatively, light emission from the LEDs may be controlled in accordance with volume data.