Multichannel Audio Encoding Using Consistent Core and Residual Processing
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Solution Overview
Problem
The existing MPEG surround encoding technique requires different encoding and decoding techniques for core audio signals and residual signals, leading to increased complexity at both the encoding and decoding ends.
Innovation Solution
A method and apparatus that detect the type of spatial extension data in an audio signal, allowing for the appropriate decoding of core audio data and residual coding data using the same decoding method, and encode multichannel audio signals by generating core and residual data and encoding them using a consistent encoding method based on the core audio object type.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different encoding techniques are used for core audio signals and residual signals according to MPEG surround standards, then compatibility with existing equipment is maintained, but complexity at both encoding and decoding ends increases
Solution Approach 1:
The patent applies universality by enabling a single decoding technique to handle both core audio signals and residual signals. The decoder is designed to universally process different signal types through a unified algorithm, eliminating the need for separate decoding paths and reducing overall system complexity while maintaining support for multiple audio formats
Solution Approach 2:
The patent merges the previously separate encoding and decoding processes for core audio and residual signals into unified processes. By combining these operations and using consistent techniques across both signal types, the patent reduces the number of distinct processing stages and simplifies the overall system architecture
2Adaptability or versatility
If multiple encoding techniques (BSAC, AAC, MP3) are supported for core audio signals, then versatility and adaptability are improved, but the complexity of managing and decoding residual signals increases
Solution Approach 1:
The patent creates a universal residual signal decoding mechanism that works independently of the core audio encoding technique used. This universal approach allows the system to support multiple core audio formats (BSAC, AAC, MP3) while maintaining a single, simplified residual signal processing path that does not multiply complexity with each additional format
Data Source
AI summary
A method, medium, and apparatus encoding and/or decoding a multichannel audio signal. The method includes detecting the type of spatial extension data included in an encoding result of an audio signal, if the spatial extension data is data indicating a core audio object type related to a technique of encoding core audio data, detecting the core audio object type; decoding core audio data by using a decoding technique according to the detected core audio object type, if the spatial extension data is residual coding data, decoding the residual coding data by using the decoding technique according to the core audio object type, and up-mixing the decoded core audio data by using the decoded residual coding data. According to the method, the core audio data and residual coding data may be decoded by using an identical decoding technique, thereby reducing complexity at the decoding end.