- 专利标题: Audio encoder and decoder using a frequency domain processor, a time domain processor, and a cross processing for continuous initialization
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申请号: US16290587申请日: 2019-03-01
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公开(公告)号: US11410668B2公开(公告)日: 2022-08-09
- 发明人: Sascha Disch , Martin Dietz , Markus Multrus , Guillaume Fuchs , Emmanuel Ravelli , Matthias Neusinger , Markus Schnell , Benjamin Schubert , Bernhard Grill
- 申请人: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
- 申请人地址: DE Munich
- 专利权人: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
- 当前专利权人: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
- 当前专利权人地址: DE Munich
- 代理机构: Haynes and Boone, LLP
- 优先权: EP14178819 20140728
- 主分类号: G10L19/02
- IPC分类号: G10L19/02 ; G10L19/022 ; G10L19/18 ; G10L19/24 ; G10L19/028 ; G10L19/04 ; G10L19/083 ; G10L19/26 ; G10L19/038 ; G10L19/00 ; G10L21/038
摘要:
An audio encoder for encoding an audio signal includes: a first encoding processor for encoding a first audio signal portion in a frequency domain, wherein the first encoding processor includes: a time frequency converter for converting the first audio signal portion into a frequency domain representation having spectral lines up to a maximum frequency of the first audio signal portion; a spectral encoder for encoding the frequency domain representation; a second encoding processor for encoding a second different audio signal portion in the time domain; a cross-processor for calculating, from the encoded spectral representation of the first audio signal portion, initialization data of the second encoding processor, so that the second encoding processing is initialized to encode the second audio signal portion immediately following the first audio signal portion in time in the audio signal; a controller configured for analyzing the audio signal and for determining, which portion of the audio signal is the first audio signal portion encoded in the frequency domain and which portion of the audio signal is the second audio signal portion encoded in the time domain; and an encoded signal former for forming an encoded audio signal including a first encoded signal portion for the first audio signal portion and a second encoded signal portion for the second audio signal portion.