Selectable Bit-Width Sound Recording for Clipping and Noise Control
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Solution Overview
Problem
Terminal devices face challenges in achieving optimal sound recording effects due to environmental sound pressure levels that can cause clipping or noise masking, and many devices lack higher-bitwidth audio recording capabilities.
Innovation Solution
The terminal device provides flexible adjustment of signal gain through selectable bit widths and implements analog and digital gain adjustments to extend the dynamic range, reducing clipping and noise interference, and allows users to set recording sound quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the terminal device uses fixed-bit width recording, then the device complexity is reduced, but the adaptability to different environmental sound pressure levels deteriorates
Solution Approach 1:
The patent implements dynamic bit width adjustment by providing multiple recording modes (16-bit, 24-bit, 32-bit) that can be selected based on environmental sound pressure levels. The system transitions from fixed-bit width to variable-bit width recording, allowing the recording parameters to adapt dynamically to different recording scenarios, thereby resolving the contradiction between device complexity and adaptability.
Solution Approach 2:
The patent changes the bit width parameter of the recording system from a fixed value to a variable value that can be adjusted according to environmental conditions. By providing different bit width options (16-bit for low sound pressure, 24-bit for medium sound pressure, 32-bit for high sound pressure), the system optimizes recording quality for different scenarios without significantly increasing device complexity.
2Measurement precision
If the terminal device increases signal gain to capture small sound signals, then the recording of small signals is improved, but clipping distortion occurs for large sound signals
Solution Approach 1:
The patent implements dynamic gain adjustment by providing multiple gain modes (1x, 2x, 4x, 8x) that can be selected based on environmental sound pressure levels. For small sound signals, higher gain (e.g., 8x) is applied to improve detection precision, while for large sound signals, lower gain (e.g., 1x) is used to prevent clipping distortion. This dynamic adjustment resolves the contradiction between detecting small signals and avoiding distortion.
Solution Approach 2:
The patent changes the gain parameter from a fixed value to a variable value that can be adjusted according to environmental conditions. By providing different gain options (1x, 2x, 4x, 8x), the system optimizes signal amplification for different scenarios, improving small signal detection while preventing large signal clipping.
3Object-generated harmful factors
If the terminal device decreases signal gain to prevent clipping of large sound signals, then clipping distortion is reduced, but small sound signals are lost in noise
Solution Approach 1:
The patent implements dynamic gain adjustment where the gain factor is selected based on the environmental sound pressure level. For large sound signals, lower gain (e.g., 1x) is applied to prevent clipping distortion, while for small sound signals, higher gain (e.g., 8x) is used to improve detection precision. This dynamic approach resolves the contradiction between preventing clipping and detecting small signals.
Solution Approach 2:
The patent changes the gain parameter from a fixed value to a variable value that adapts to environmental conditions. By providing multiple gain options (1x, 2x, 4x, 8x), the system can optimize the gain setting for each recording scenario, preventing clipping for large signals while maintaining detection precision for small signals.
4Measurement precision
If the terminal device uses higher bit width recording, then the sound quality is improved, but the data storage requirement increases
Solution Approach 1:
The patent changes the bit width parameter from a fixed high value to a variable value that can be selected based on recording requirements. By providing options for 16-bit, 24-bit, and 32-bit recording, users can balance sound quality against data storage requirements, storing only the necessary amount of data for each specific recording scenario.
Solution Approach 2:
The patent implements dynamic bit width selection where the bit width is adjusted according to the environmental sound pressure level and recording requirements. For scenarios requiring high precision, higher bit widths (24-bit, 32-bit) are used, while for less demanding scenarios, lower bit width (16-bit) suffices, thereby optimizing the balance between sound quality and storage requirements.
Data Source
AI summary
Embodiments of the present invention provide a sound recording method and apparatus. The method includes: displaying, by a terminal device, a first interface, where the first interface includes a first control, and the first control includes: a first option used for selecting a recording whose output specification is sound quality with a first bit width, and a second option used for selecting a recording whose output specification is sound quality of a second bit width; and processing, by the terminal device in a case that the terminal device receives an operation of selecting the first option, a recording obtained by a microphone, to obtain a recording with the first bit width; or processing, by the terminal device in a case that the terminal device receives an operation of selecting the second option, a recording obtained by a microphone, to obtain a recording with the second bit width.