Audio Signal Decoding with Selective Headers and Timeslot Mapping
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Solution Overview
Problem
Existing audio signal decoding technologies face challenges in reproducing audio signals from random timing points due to non-changeable configuration information, inefficient signal compression, and reduced transfer efficiencies caused by unnecessary information in spatial information signals.
Innovation Solution
The proposed solution involves an audio signal decoding apparatus that selectively includes a spatial information signal in a header and uses a variable bit number to represent the position of a timeslot for parameter application, reducing the information quantity required for downmix signal arrangement and mapping multi-channel audio signals to speakers efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If configuration information is inserted in an audio signal once and kept non-changeable, then the audio signal can be decoded with stable configuration, but the audio signal cannot be reproduced from random timing points
Solution Approach 1:
The patent makes the header dynamically selectable based on the reproduction scenario. The encoding apparatus determines whether to include a header based on whether random timing point reproduction is required, and the decoding apparatus adapts its processing accordingly. This dynamic approach resolves the contradiction between stable configuration decoding and random timing point reproduction capability.
Solution Approach 2:
The patent segments the audio signal structure into optional header components and mandatory parameter sets. By making the header a selectable segment rather than a fixed component, the system can include configuration information only when needed for random timing point reproduction, while allowing efficient decoding when the header is omitted.
2Reliability
If spatial information signal is always included in the audio signal, then complete spatial information is available for decoding, but signal compression and transfer efficiencies are reduced due to unnecessary information
Solution Approach 1:
The patent extracts the header containing configuration information from the mandatory structure and makes it optional. The encoding apparatus determines whether to include the header based on the specific application scenario, and the decoding apparatus processes the signal accordingly. This extraction allows the system to achieve high compression efficiency by omitting unnecessary headers while maintaining the ability to include complete spatial information when required.
3Ease of manufacture
If fixed bit number is used to represent timeslot position, then the representation is simple and consistent, but the information quantity required for downmix signal arrangement is increased
Solution Approach 1:
The patent changes the parameter representation from fixed bit number to variable bit number based on the actual timeslot position. When the timeslot position is small, fewer bits are required, reducing the information quantity for downmix signal arrangement. This parameter change maintains representation simplicity through standardized variable-length encoding while optimizing the information quantity required.
Data Source
AI summary
The invention relates to a method for decoding an audio signal, to allow an audio signal to be compressed and transferred more efficiently. The inventive method comprises steps of receiving an audio signal with spatial information signal, obtaining location information using the number of time slot and parameter of audio signal, establishing a multi-channel audio signal by applying spatial information signal to down-mix signal, and performing a multi-channel array for a multi-channel audio signal in response to the output channel.