IMPROVED SUBBAND BLOCK BASED HARMONIC TRANSPOSITION
专利「IMPROVED SUBBAND BLOCK BASED HARMONIC TRANSPOSITION」由 Dolby International AB 持有，当前状态为已注册，申请号 P/877。LaoBiz 老商通提供老挝知识产权信息检索与企业关联查询。
Patent “IMPROVED SUBBAND BLOCK BASED HARMONIC TRANSPOSITION” is held by Dolby International AB; status: 已注册. Search Laos IP records on LaoBiz.
P/877
图样
基础信息
- 类型
- 专利
- 申请号
P/877- 状态
- 已注册
- 申请人
- Dolby International AB
- 代理机构
- ACTIP (LAO) IP CO, LTD.
- 申请日期
- 2022-12-09
- 注册号
P/877- 公开/公告日
- 2024-10-24
- 注册/授权日
- 2024-09-20
- 届满日
- 2042-12-09
- 国际分类
- G10L 19/02 · G10L 21/04 · G10L 25/18 · G10L 19/022 · G10L 19/032
- 商品 / 服务
- —
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摘要
The present document relates to audio source coding systems which make use of a
harmonic transposition method for high frequency reconstruction (HFR), as well as to digital
effectprocessors,e.g.exciters,wheregenerationofharmonicdistortionaddbrightnesstothe processedsignal,andtotimestretcherswhereasignaldurationisprolongedwithmaintained spectral content. A system and method configured to genemte a time stretched and'/or frequency transposed signal from an input signal is described' The system comprises an analysis filterbank (101) confrgured to provide an analysis subband signal from the input signal; wherein the analysis subband signal comprises a plurality of complex valued analysis samples, each having a phase and a magnitude' Furthermore' the system comprises a subband processing unit (102) configured to determine a synthesis subband signal from the analysis subband signal using a subband transposition factor Q and a subband stretch factor S ' The subbandprocessingunit(102)performsablockbasednonlinearprocessingwhereinthe magnitudeofsamplesofthesynthesissubbandsigralaredeterminedfromthemagnitudeof corresponding samples of the analysis subband sigral and a predetermined sample of the analysis subband signal' In addition' the system comprises a synthesis filte$ank (103) configured to generate the time stretched and/or frequency transposed signal from the synthesis subband signal'
The present document relates to audio source coding systems which make use of a
harmonic transposition method for high frequency reconstruction (HFR), as well as to digital
effectprocessors,e.g.exciters,wheregenerationofharmonicdistortionaddbrightnesstothe processedsignal,andtotimestretcherswhereasignaldurationisprolongedwithmaintained spectral content. A system and method configured to genemte a time stretched and'/or frequency transposed signal from an input signal is described' The system comprises an analysis filterbank (101) confrgured to provide an analysis subband signal from the input signal; wherein the analysis subband signal comprises a plurality of complex valued analysis samples, each having a phase and a magnitude' Furthermore' the system comprises a subband processing unit (102) configured to determine a synthesis subband signal from the analysis subband signal using a subband transposition factor Q and a subband stretch factor S ' The subbandprocessingunit(102)performsablockbasednonlinearprocessingwhereinthe magnitudeofsamplesofthesynthesissubbandsigralaredeterminedfromthemagnitudeof corresponding samples of the analysis subband sigral and a predetermined sample of the analysis subband signal' In addition' the system comprises a synthesis filte$ank (103) configured to generate the time stretched and/or frequency transposed signal from the synthesis subband signal'