Upmixing of audio signals
First Claim
1. A method of upmixing an audio signal, comprising:
- decomposing the audio signal into a diffuse signal and a direct signal;
determining complexity of the audio signal;
generating an audio bed at least in part based on the diffuse signal, the audio bed including a height channel;
extracting an audio object from the direct signal;
estimating metadata of the audio object, the metadata including height information of the audio object;
determining at least one of a diffuse gain for the audio signal based on the complexity, an object gain for the audio signal based on the complexity, or a height gain for the audio signal based on the complexity; and
rendering the audio bed and the audio object as an upmixed audio signal, wherein the audio bed is rendered to at least one predefined position and the audio object is rendered according to the metadata.
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Abstract
Example embodiments disclosed herein relates to upmixing of audio signals. A method of upmixing an audio signal is described. The method includes decomposing the audio signal into a diffuse signal and a direct signal, generating an audio bed at least in part based on the diffuse signal, the audio bed including a height channel, extracting an audio object from the direct signal, estimating metadata of the audio object, the metadata including height information of the audio object; and rendering the audio bed and the audio object as an upmixed audio signal, wherein the audio bed is rendered to a predefined position and the audio object is rendered according to the metadata. Corresponding system and computer program product are described as well.
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Citations
9 Claims
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1. A method of upmixing an audio signal, comprising:
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decomposing the audio signal into a diffuse signal and a direct signal; determining complexity of the audio signal; generating an audio bed at least in part based on the diffuse signal, the audio bed including a height channel; extracting an audio object from the direct signal; estimating metadata of the audio object, the metadata including height information of the audio object; determining at least one of a diffuse gain for the audio signal based on the complexity, an object gain for the audio signal based on the complexity, or a height gain for the audio signal based on the complexity; and rendering the audio bed and the audio object as an upmixed audio signal, wherein the audio bed is rendered to at least one predefined position and the audio object is rendered according to the metadata. - View Dependent Claims (2, 3, 4, 5, 6, 9)
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7. A method of upmixing an audio signal, comprising:
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decomposing the audio signal into a diffuse signal and a direct signal; generating an audio bed at least in part based on the diffuse signal, the audio bed including a height channel; extracting an audio object from the direct signal; estimating metadata of the audio object, the metadata including height information of the audio object and rendering the audio bed and the audio object as an upmixed audio signal, wherein the audio bed is rendered to at least one predefined position and the audio object is rendered according to the metadata, wherein the decomposing the audio signal comprises; applying a first decomposition process to obtain the diffuse signal; and applying a second decomposition process to obtain the direct signal, the first decomposition process having less diffuse-to-direct leakage than the second decomposition process. - View Dependent Claims (8)
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Specification