Audio Signal Decoding with Combined Object Information
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Solution Overview
Problem
Conventional MCUs lack the ability to control gain and panning of downmix signals, resulting in high bandwidth requirements for decoding multi-object audio signals, which is inefficient and resource-intensive.
Innovation Solution
A method and apparatus that utilize object information, including object level, gain, and correlation information to modify downmix signals, allowing for efficient decoding of multi-object audio signals by generating downmix processing information and processing the combined downmix signal to control object gain and output in remote conferences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional MCU uses combined downmix signals for teleconference, then audio signal transmission is achieved, but the ability to control gain and panning of individual signals is lost
Solution Approach 1:
The patent segments the audio signal into multiple independent downmix signals (first downmix signal and second downmix signal), each carrying specific object information. This segmentation allows individual control of gain and panning for each signal component while maintaining the ability to process them collectively, thus resolving the contradiction between operational control and information preservation.
2Reliability
If apparatus decodes whole multi-object signals, then complete audio reconstruction is achieved, but wide bandwidth resource requirement increases
Solution Approach 1:
The patent extracts essential decoding information from the multi-object audio signal and transmits it separately as downmix signals with embedded object information. Instead of transmitting and decoding the entire high-bandwidth multi-object signal, the system extracts and transmits only the necessary components (downmix signals containing object level, gain, and panning information), thereby achieving complete audio reconstruction with reduced bandwidth consumption.
3Productivity
If conventional MCU processes downmix signals, then audio output is generated, but individual object signal control is impossible
Solution Approach 1:
The patent introduces dynamic control parameters (object level information, object gain information, and object panning information) that can be adjusted independently for each downmix signal. This dynamic control mechanism allows the system to maintain high processing efficiency while enabling flexible individual object signal control, as the control parameters can be modified in real-time without reprocessing the entire audio signal.
Data Source
AI summary
A method for decoding an audio signal comprises receiving a combined downmix, a combined object information, and a mix information, the combined downmix being generating using at least two downmix signals, the combined object information being made by combination of at least two sets of object information, generating a downmix processing information using the combined object information and the mix information, and processing the combined downmix using the downmix processing information.The method and an apparatus for decoding an audio signal comprising the combined downmix and the combined object information can control object gain and output in a remote conference and so on.The method and the apparatus for decoding audio signal that contains multi-object signals are fast and efficiently by reducing process time, computer resource, thereby relieving the resource requirement like the wide bandwidth by using the combined object information.