Audio Channel Decoding with Virtual Channel Skipping
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Solution Overview
Problem
Current media signal processing methods transfer unnecessary spatial information when encoding channels less than the compressible channels, leading to inefficient bit transmission and increased decoding operations.
Innovation Solution
The method sets a virtual value for channels that are not to be transferred and omits decoding for these channels, allowing only valid channels to be decoded, thereby reducing unnecessary bit transmission and decoding operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If spatial information is transferred for all channels including virtual channels, then complete channel reconstruction is possible, but unnecessary bit transmission occurs
Solution Approach 1:
The patent extracts and identifies virtual channels from the channel configuration, then excludes them from spatial information transfer. The encoder determines which channels are virtual versus real, and only transfers spatial information for real channels, thereby removing the unnecessary data transmission while preserving complete information for actual channel reconstruction.
Solution Approach 2:
The patent applies different quality levels of spatial information transfer to different channels based on their validity. Real channels receive full spatial information for accurate reconstruction, while virtual channels receive no spatial information transfer. This localized differentiation optimizes bit transmission by matching information quality to channel requirements.
2Stability of the object's composition
If decoding is performed for all channels including virtual channels, then channel configuration consistency is maintained, but decoding operation quantity increases
Solution Approach 1:
The decoding apparatus extracts and identifies which channels are virtual versus real based on the transmitted channel configuration information. Once identified, the decoder performs reconstruction operations only for real channels, extracting the necessary spatial information from the bitstream and applying it only where needed, thereby reducing overall decoding operation quantity.
Solution Approach 2:
The patent applies different decoding operation levels to different channels based on their validity. Real channels undergo full decoding and spatial reconstruction operations, while virtual channels are identified and skipped from reconstruction operations. This localized processing maintains configuration consistency for the overall channel structure while optimizing computational efficiency by focusing operations only where necessary.
Data Source
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AI summary
The present invention relates to a method of processing a media signal and apparatus therefor. A media signal decoding method according to the present invention includes detecting a channel having a valid value of the multi-channels to be generated and generating the detected channel having the valid value from the downmix signal and the spatial information signal. Accordingly, the present invention is able to reduce a decoding operation quantity by detecting which one of the channels to be generated from a transferred media signal is set to a virtual value and omitting decoding for the generation of the channel set to the virtual value.