摘要:
An apparatus (100) for determining a converted spatial audio signal, the converted spatial audio signal having an omnidirectional audio component (W') and at least one directional audio component, from an input spatial audio signal, the input spatial audio signal having an input audio representation (W) and an input direction of arrival (φ). The apparatus (100) comprises an estimator (110) for estimating a wave representation (W) comprising a wave field measure and a wave direction of arrival measure based on the input audio representation (W) and the input direction of arrival (φ). The apparatus (100) further comprises a processor (120) for processing the wave field measure and the wave direction of arrival measure to obtain the omnidirectional audio component (W') and the at least one directional component (X;Y;Z).
摘要:
It is shown an audio processor 50 for processing an audio signal 55. The audio processor comprises an audio signal phase measure calculator 60 configured for calculating a phase measure 80 of an audio signal for a time frame 75a, a target phase measure determiner 65 for determining a target phase measure 85 for said time frame 75a, and a phase corrector 70 configured for correcting phases 45 of the audio signal 55 for the time frame 75a using the calculated phase measure 80 and the target phase measure 85 to obtain a processed audio signal 90.
摘要:
It is described an audio processor 50' for processing an audio signal 55. The audio processor 50' comprises a target phase measure determiner 65' for determining a target phase measure 85' for the audio signal 55 in a time frame 75, a phase error calculator 200 for calculating a phase error 105' using a phase of the audio signal 55 in the time frame 75 and the target phase measure 85', and a phase corrector 70' configured for correcting the phase of the audio signal 55 in the time frame using the phase error 105'.
摘要:
It is shown a decoder 110" for decoding an audio signal 32. The decoder 110"comprises a first target spectrum generator 65a for generating a target spectrum 85a" for a first time frame of a subband signal of the audio signal 32 using first correction data 295a. A first phase corrector 70a for corrects a phase 45 of the subband signal in the first time frame of the audio signal 32 determined with a phase correction algorithm, wherein the correction is performed by reducing a difference between a measure of the subband signal in the first time frame of the audio signal 32 and the target spectrum 85a". An audio subband signal calculator 350 calculates the audio subband signal 355 for the first time frame using a corrected phase 91a for the time frame and for calculating audio subband signals 355 for a second time frame different from the first time frame using the measure of the subband signal 85a" in the second time frame or using a corrected phase calculation in accordance with a further phase correction algorithm different from the phase correction algorithm.
摘要:
It is shown a calculator 270 for determining phase correction data 295 for an audio signal 55. The calculator comprises a variation determiner 275 for determining a variation of a phase of the audio signal 55 in a first and a second variation mode, a variation comparator 280 for comparing a first variation 290a determined using the first variation mode and a second variation 290b determined using the second variation mode, and a correction data calculator 285 for calculating the phase correction data 295 in accordance with the first variation mode or the second variation mode based on a result of the comparing.
摘要:
An apparatus (100) for determining a spatial output multi-channel audio signal based on an input audio signal and an input parameter. The apparatus (100) comprises a decomposer (110) for decomposing the input audio signal based on the input parameter to obtain a first decomposed signal and a second decomposed signal different from each other. Furthermore, the apparatus (100) comprises a renderer (110) for rendering the first decomposed signal to obtain a first rendered signal having a first semantic property and for rendering the second decomposed signal to obtain a second rendered signal having a second semantic property being different from the first semantic property. The apparatus (100) comprises a processor (130) for processing the first rendered signal and the second rendered signal to obtain the spatial output multi-channel audio signal.
摘要:
An apparatus (100) for merging a first spatial audio stream with a second spatial audio stream to obtain a merged audio stream comprising an estimator (120) for estimating a first wave representation comprising a first wave direction measure and a first wave field measure for the first spatial audio stream, the first spatial audio stream having a first audio representation and a first direction of arrival. The estimator (120) being adapted for estimating a second wave representation comprising a second wave direction measure and a second wave field measure for the second spatial audio stream, the second spatial audio stream having a second audio representation and a second direction of arrival. The apparatus (100) further comprising a processor (130) for processing the first wave representation and the second wave representation to obtain a merged wave representation comprising a merged wave field measure and a merged direction of arrival measure, and for processing the first audio representation and the second audio representation to obtain a merged audio representation, and for providing the merged audio stream comprising the merged audio representation and the merged direction of arrival measure.
摘要:
A spatial audio processor for providing spatial parameters based on an acoustic input signal comprises a signal characteristics determiner and a controllable parameter estimator. The signal characteristics determiner is configured to determine a signal characteristic of the acoustic input signal. The controllable parameter estimator for calculating the spatial parameters for the acoustic input signal in accordance with a variable spatial parameter calculation rule is configured to modify the variable spatial parameter calculation rule in accordance with the determined signal characteristic.