Multi-Channel Audio Encoding with Dynamic Block Switching
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Solution Overview
Problem
Current methods lack an effective way to signal divided audio signals, making it difficult to process them effectively, especially during transient periods where signal characteristics change abruptly.
Innovation Solution
A method for generating an encoded audio signal that includes basic configuration information for multi-channel audio coding and extension configuration information identified by a type identifier, allowing for efficient signaling of division information through block, band, and channel division using division IDs and non-division IDs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If signals are compressed without division in stationary periods, then compression efficiency is improved, but signal distortion occurs in transient periods
Solution Approach 1:
The patent applies dynamic block switching to adapt the processing granularity to signal characteristics. The encoder dynamically selects between long blocks (for stationary periods with high compression efficiency) and short blocks (for transient periods with low distortion), making the system adaptable to changing signal conditions rather than using a fixed processing approach
Solution Approach 2:
The patent segments the audio signal into different block sizes (long and short blocks) that can be selectively applied. By dividing the signal processing into different temporal segments with different block lengths, the system can optimize compression for stationary portions while maintaining quality for transient portions
2Reliability
If signals are divisionally processed in transient periods, then signal distortion is prevented, but signaling complexity increases due to lack of detailed division information methods
Solution Approach 1:
The patent extracts only the essential division information needed for block, band, and channel segmentation. Instead of signaling all possible division details, it selectively transmits only the critical parameters (such as block size indicators, band division flags, and channel assignment information) required to reconstruct the divided signal structure at the decoder
Solution Approach 2:
The patent establishes a predefined framework for signal division where the encoder and decoder agree on possible division structures in advance. This preliminary arrangement allows the encoder to simply signal which pre-defined division pattern is used, rather than describing the entire division structure, thereby reducing signaling complexity
3Loss of information
If extension configuration information is added for division signaling, then division information completeness is improved, but data transmission overhead increases
Solution Approach 1:
The patent applies extension configuration information selectively only when division is actually performed. Instead of always transmitting complete configuration data, the system adds extension information locally and conditionally - for example, adding band division information only when bands are divided, or channel configuration only when channel processing is applied, thereby providing complete division information only where needed
Data Source
AI summary
A method for generating an encoded audio signal, and a method for processing the same during the multi-channel audio coding are disclosed. The present invention provides the method for generating an encoded audio signal comprising: including basic configuration information requisite for a multi-channel audio coding process; and including extension configuration information, wherein the extension configuration information includes configuration information of extension environment which is identified by a type identifier (ID).