Methods and apparatuses for encoding and decoding object-based audio signals
First Claim
1. An audio decoding method comprising:
- receiving, by an audio decoding apparatus, a downmix signal comprising at least one object signal, and object-based side information generated when the at least one object signal is downmixed into the downmix signal;
receiving, by the audio decoding apparatus, control information for controlling position or level of at least one object signal;
receiving, by the audio decoding apparatus, a HRTF (Head-Related Transfer Function) being a transfer function which describes the transmission of sound waves between a sound source at an arbitrary position and the eardrum;
generating, by the audio decoding apparatus, binaural parameter information using the object-based side information, the control information and the HRTF; and
generating, by the audio decoding apparatus, a binaural signal by processing the downmix signal using the binaural parameter information, wherein the binaural signal is virtual 3D signal.
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Abstract
Provided are an audio encoding method and apparatus and an audio decoding method and apparatus in which audio signals can be encoded or decoded so that sound images can be localized at any desired position for each object audio signal. The audio decoding method generating a third downmix signal by combining a first downmix signal extracted from a first audio signal and a second downmix signal extracted from a second audio signal; generating third object-based side information by combining first object-based side information extracted from the first audio signal and second object-based side information extracted from the second audio signal; converting the third object-based side information into channel-based side information; and generating a multi-channel audio signal using the third downmix signal and the channel-based side information.
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Citations
12 Claims
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1. An audio decoding method comprising:
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receiving, by an audio decoding apparatus, a downmix signal comprising at least one object signal, and object-based side information generated when the at least one object signal is downmixed into the downmix signal; receiving, by the audio decoding apparatus, control information for controlling position or level of at least one object signal; receiving, by the audio decoding apparatus, a HRTF (Head-Related Transfer Function) being a transfer function which describes the transmission of sound waves between a sound source at an arbitrary position and the eardrum; generating, by the audio decoding apparatus, binaural parameter information using the object-based side information, the control information and the HRTF; and generating, by the audio decoding apparatus, a binaural signal by processing the downmix signal using the binaural parameter information, wherein the binaural signal is virtual 3D signal. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An audio decoding apparatus comprising:
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a demultiplexer receiving a downmix signal comprising at least one object signal, and object-based side information generated when the at least one object signal is downmixed into the downmix signal; a parameter converter configured to; receive control information for controlling position or level of at least one object signal, receive a HRTF (Head-Related Transfer Function) being a transfer function which describes the transmission of sound waves between a sound source at an arbitrary position and the eardrum, generate binaural parameter information using the object-based side information, the control information and the HRTF, and, generate a binaural signal by processing the downmix signal using the binaural parameter information, wherein the binaural signal is virtual 3D signal. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification