Signal Path Delay Compensation for Synchronized Audio Decoding
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Solution Overview
Problem
In multi-channel audio systems, time delays during signal processing can cause degradation of audio quality due to mismatches in time synchronization between downmix signals and spatial information across different domains.
Innovation Solution
The solution involves compensating for time synchronization differences by delaying either the downmix signal or the spatial information, using a downmix coding identifier to determine the appropriate decoding scheme and domain conversion, ensuring that the downmix signal and spatial information are synchronized in the encoding domain, thereby preventing audio quality degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If downmix signal processing (time-to-frequency domain conversions) is performed, then audio coding efficiency is improved, but time delay occurs relative to other downmix signals and spatial parameters
Solution Approach 1:
The patent applies preliminary action by calculating and storing time delay values before the actual signal processing occurs. The system determines the time delay that will result from domain conversions in advance, and uses this pre-calculated delay information to synchronize the downmix signal with spatial parameters during the encoding process, preventing synchronization issues rather than correcting them later.
Solution Approach 2:
The patent introduces an intermediary time delay compensation mechanism that acts as a mediator between the frequency domain processed downmix signal and the time domain spatial parameters. This intermediary component calculates the elapsed time of domain conversions and applies appropriate delay adjustments to ensure temporal alignment between signals that have undergone different processing paths.
2Adaptability or versatility
If domain conversion of downmix signal is performed, then decoding flexibility is improved, but time synchronization accuracy deteriorates
Solution Approach 1:
The system performs preliminary calculation of time delay values based on the specific domain conversion operations that will be applied to the downmix signal. By determining the elapsed time of conversions in advance, the system can compensate for synchronization errors while maintaining the flexibility to apply different decoding schemes and domain conversions as needed.
Solution Approach 2:
The patent dynamically adjusts time delay parameters based on the actual domain conversion operations performed on the downmix signal. The system changes the time delay parameter to match the elapsed time of the specific conversion process used, allowing the system to maintain accurate synchronization while supporting multiple decoding schemes and domain conversion options.
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.