Multi-Resolution Audio Recording for Device Compatibility
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Solution Overview
Problem
Conventional smartphones are limited to fixed audio recording settings, restricting audio resolution to 16-bit dynamic range and 48 kHz sample rate, which prevents playback on devices with higher resolution capabilities and limits sharing of audio files across different devices.
Innovation Solution
An apparatus and method that record multiple audio tracks with different resolution settings within a single file, allowing users to select tracks based on playback compatibility, using audio circuitry to process and store signals from microphones with varying configurations, including downsampling and dynamic range adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If audio recording is done with fixed high resolution settings, then audio quality is improved, but compatibility with devices having lower playback capabilities deteriorates
Solution Approach 1:
The audio signal is segmented into multiple tracks with different resolution settings within a single file. Each track represents a different resolution version (e.g., high resolution 24-bit/96kHz and low resolution 16-bit/48kHz), allowing the audio content to be divided into compatible segments for different playback devices.
Solution Approach 2:
The audio file contains multiple versions of the same audio signal with different parameters (sampling rate and bit depth). By changing these parameters to create multiple tracks, the system enables high-quality recording while maintaining compatibility with various playback devices that have different resolution capabilities.
2Adaptability or versatility
If multiple audio tracks with different resolutions are recorded, then adaptability to different devices is improved, but device complexity increases
Solution Approach 1:
The system performs preliminary processing during recording by creating multiple resolution versions of the audio signal simultaneously. This preliminary action of generating multiple tracks during capture eliminates the need for complex post-processing or conversion when playing back on different devices, as the appropriate resolution track is already prepared.
Solution Approach 2:
The audio recording system is designed to perform multiple functions simultaneously: it records high-resolution audio for high-end devices and low-resolution audio for standard devices within the same recording session. This multi-functionality allows a single recording system to serve diverse playback requirements without requiring separate recording sessions or complex real-time processing.
3Device complexity
If fixed audio resolution settings are used, then device complexity is reduced, but loss of information occurs when playing on higher resolution devices
Solution Approach 1:
The audio information is segmented into multiple resolution tracks, preserving both high-resolution and low-resolution versions. This segmentation ensures that no audio information is lost during recording, as the high-resolution track retains all original details while the low-resolution track provides compatibility for standard devices.
Solution Approach 2:
By recording multiple tracks with different parameters (bit depth and sampling rate), the system preserves complete audio information at high resolution while also creating downsampled versions. This approach prevents information loss because the original high-resolution data is retained in the high-resolution track, which can be used by capable devices without any quality degradation.
Data Source
AI summary
An apparatus including at least one microphone; audio circuitry connected to the at least one microphone; and a memory connected to the audio circuitry. The audio circuitry is configured to output a first audio track and at least one second audio track. The audio circuitry is configured to form the first audio track from an output signal, provided by the at least one microphone, by processing the output signal with a first audio configuring, and where the audio circuitry is configured to form the at least one second audio track from the output signal, provided by the at least one microphone, without the first audio configuring. The memory is configured to store the first audio track and the at least one second audio track together.