Downmix Signal Delay Compensation Across Audio Processing Domains
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Solution Overview
Problem
In multi-channel audio systems, time delays during signal processing can cause degradation in audio quality due to mismatches in time synchronization between downmix signals and spatial information across different domains.
Innovation Solution
The implementation of a system that includes a domain converter and a delay processor to compensate for time delays in signal processing paths, ensuring that downmix signals and spatial information are synchronized, either by delaying the downmix signal or the spatial information, to maintain proper time alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If downmix signal is converted from first domain to second domain, then audio signal processing flexibility is improved, but time delay occurs between downmix signal and spatial information
Solution Approach 1:
The patent applies preliminary action by calculating and storing the elapsed time of domain conversion in advance. The delay processor uses this pre-calculated time value to compensate for the time delay between the downmix signal and spatial information, ensuring that the synchronization correction can be applied efficiently without real-time computation overhead.
Solution Approach 2:
The patent introduces an intermediary delay processor that acts as a mediator between the domain converter and the audio signal combination stage. This intermediary component receives the downmix signal, applies the necessary time delay compensation based on the elapsed time, and outputs the synchronized signal for combination with spatial information.
2Manufacturing precision
If domain conversion is performed on downmix signal, then multi-channel audio quality is improved, but time synchronization between downmix signal and spatial information deteriorates
Solution Approach 1:
The patent implements feedback by using the calculated elapsed time of domain conversion as feedback information. This elapsed time value is fed back to the delay processor, which uses it to determine the appropriate compensation delay amount, creating a closed-loop synchronization system that ensures accurate time alignment.
Solution Approach 2:
The patent applies parameter changes by dynamically adjusting the delay time parameter of the downmix signal based on the elapsed time of domain conversion. The delay processor modifies the time domain parameter of the signal to compensate for the synchronization mismatch introduced by domain conversion operations.
3Measurement precision
If time delay compensation is applied to downmix signal, then time synchronization is improved, but device complexity increases
Solution Approach 1:
The patent reduces complexity by performing preliminary calculation of the elapsed time and storing it for later use. This pre-computation approach eliminates the need for complex real-time measurements and calculations during the signal processing stage, simplifying the overall system architecture.
Solution Approach 2:
The system applies self-service by automatically determining and applying the appropriate delay compensation without requiring external intervention or complex control mechanisms. The delay processor autonomously uses the elapsed time information to synchronize the signals, reducing the need for additional complex synchronization control logic.
Data Source
AI summary
The disclosed embodiments include systems, methods, apparatuses, and computer-readable mediums for compensating one or more signals and/or one or more parameters for time delays in one or more signal processing paths.