Audio Decoding Apparatus Using Location-Based Signal Filters
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Solution Overview
Problem
Current technologies lack a convenient and easy way to integrate modern audio processing techniques with modern recording and reproduction techniques, limiting the application of advanced audio signal processing methods in various audio data handling scenarios.
Innovation Solution
A decoding and encoding apparatus that uses a filter provider to calculate signal filters based on the locations of actuators and sensors, and applies these filters to encoded audio signals to adapt them for optimal reproduction and recording, utilizing techniques such as wave field synthesis and virtual microphone processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If modern audio processing techniques are integrated with recording and reproduction techniques, then audio processing capability is improved, but device complexity increases
Solution Approach 1:
The patent introduces a calculator as an intermediary processing unit that receives digital content from recording devices and adapts it for reproduction. This intermediary component enables the integration of modern audio processing techniques without requiring direct complex integration between recording and reproduction systems, thus managing system complexity while improving audio processing capability.
Solution Approach 2:
The system adapts digital content by changing parameters such as channel configuration, spatial distribution, and signal characteristics based on the reproduction session requirements. This parameter-based adaptation allows flexible integration of audio processing techniques across different devices and scenarios without increasing fundamental system complexity.
2Manufacturing precision
If audio signals are adapted to different reproduction sessions, then audio quality is improved, but processing time increases
Solution Approach 1:
The system performs preliminary calculations and filter generation during the encoding phase, preparing adaptation parameters in advance. By pre-calculating the necessary transformations and storing them as metadata, the actual audio adaptation during playback requires less real-time processing, thus improving audio quality while minimizing processing time delays.
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
Enables the combination of modern audio processing techniques with recording and reproduction methods, allowing for personalized and optimized audio experiences across different devices and scenarios, including real-time multichannel communication and flexible digital content handling.
Implementation Method 1
The virtual microphone processor is configured to apply Green's function for calculating the virtual microphone signals
Implementation Method 2
the filter provider is configured to divide the transfer functions in the time domain into an early reflection part and a late reflection part
Data Source
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AI summary
The invention refers to a decoding apparatus (200) for decoding encoded audio signals (992). The decoding apparatus (200) is configured to provide decoded audio signals (990) and comprises a filter provider (201) and a filter applicator (202). The filter provider (201) is configured to provide a signal filter (W(repro)) based on locations of actuators (L1, L2, L3, L4, L5) used for reproducing the decoded audio signals (990) and based on locations associated with the encoded audio signals (992) The filter applicator (202) is configured to apply the signal filter (W(repro)) to the encoded audio signals (992) in order to provide adapted audio signals (994). The decoded audio signals (990) are based on the adapted audio signals (994). The invention further refers to an encoding apparatus and to corresponding methods.