发明名称 |
AUDIO SIGNAL ENCODER, AUDIO SIGNAL DECODER, METHOD FOR ENCODING OR DECODING AN AUDIO SIGNAL USING AN ALIASING-CANCELLATION |
摘要 |
An audio signal decoder (200) for providing a decoded representation (212) of an audio content on the basis of an encoded representation (310) of the audio content comprises a transform domain path (230, 240, 242, 250, 260) configured to obtain a time-domain representation (212) of a portion of the audio content encoded in a transform-domain mode on the basis of a first set (220) of spectral coefficients, a representation (224) of an aliasing-cancellation stimulus signal and a plurality of linear-prediction-domain parameters (222). The transform domain path comprises a spectrum processor (230) configured to apply a spectrum shaping to the first set of spectral coefficients in dependence on at least a subset of the linear-prediction-domain parameters, to obtain a spectrally-shaped version (232) of the first set of spectral coefficients. The transform domain path comprises a first frequency-domain-to-time-domain converter (240) configured to obtain a time-domain representation of the audio content on the basis of the spectrally-shaped version of the first set of spectral coefficients. The transform domain path comprises an aliasing-cancellation stimulus filter configured to filter (250) the aliasing-cancellation stimulus signal (324) in dependence on at least a subset of the linear-prediction-domain parameters (222), to derive an aliasing-cancellation synthesis signal (252) from the aliasing-cancellation stimulus signal. The transform domain path also comprises a combiner (260) configured to combine the time-domain representation (242) of the audio content with the aliasing-cancellation synthesis signal (252), or a post-processed version thereof, to obtain an aliasing reduced time-domain signal.
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申请公布号 |
CA2778382(A1) |
申请公布日期 |
2011.04.28 |
申请号 |
CA20102778382 |
申请日期 |
2010.10.19 |
申请人 |
FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V.;VOICEAGE CORPORATION;KONINKLIJKE PHILIPS ELECTRONIC N.V.;DOLBY INTERNATIONAL AB |
发明人 |
BESSETTE, BRUNO;NEUENDORF, MAX;GEIGER, RALF;GOURNAY, PHILIPPE;LEFEBVRE, ROCH;GRILL, BERNHARD;LECOMTE, JEREMIE;BAYER, STEFAN;RETTELBACH, NIKOLAUS;VILLEMOES, LARS;SALAMI, REDWAN;DEN BRINKER, ALBERTUS C.;DEN BRINKER, ALBERTUS C. |
分类号 |
G10L19/14;G10L19/00;G10L19/02 |
主分类号 |
G10L19/14 |
代理机构 |
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