Title:
信号生成システム及び信号生成方法
Document Type and Number:
Japanese Patent JP6429966
Kind Code:
B2
Abstract:
The invention provides an efficient implementation of cross-product enhanced high-frequency reconstruction (HFR), wherein a new component at frequency QΩ + rΩ0 is generated on the basis of existing components at Ω and Ω + Ω0. The invention provides a block-based harmonic transposition, wherein a time block of complex subband samples is processed with a common phase modification. Superposition of several modified samples has the net effect of limiting undesirable intermodulation products, thereby enabling a coarser frequency resolution and/or lower degree of oversampling to be used. In one embodiment, the invention further includes a window function suitable for use with block-based cross-product enhanced HFR. A hardware embodiment of the invention may include an analysis filter bank (101), a subband processing unit (102) configurable by control data (104) and a synthesis filter bank (103).
Inventors:
Willemoes, Larche
Application Number:
JP2017184543A
Publication Date:
November 28, 2018
Filing Date:
September 26, 2017
Export Citation:
Assignee:
Dolby International Arb
International Classes:
G10L21/043; G10L21/038; G10L21/0388; G10L21/04
Domestic Patent References:
| JP2001127641A |
Foreign References:
| WO2010081892A2 |
Other References:
HUAN ZHOU,FINALIZATION OF CE ON QMF BASED HARMONIC TRANSPOSER,93. MPEG MEETING,2010年 7月22日,NO.M17807
Attorney, Agent or Firm:
Tadashige Ito
Tadahiko Ito
Shinsuke Onuki
Tadahiko Ito
Shinsuke Onuki