专利名称：Encoding apparatus and encoding method发明人：Takuya Kawashima,Masahiro Oshikiri申请号：US15079524申请日：20160324公开号：US09472200B2公开日：20161018
专利附图：
摘要：A threshold amplitude is calculated for each subband obtained by splitting anextension band. For each subband, an amplitude of transform coefficients is comparedwith the threshold amplitude to extract a transform coefficient having an amplitudelarger than the threshold amplitude as a representative transform coefficient. When a
number of the extracted representative transform coefficients is less than apredetermined number, the threshold amplitude is updated in accordance with anamount by which the number of the representative transform coefficients is less than thepredetermined number. A transform coefficient is extracted again using the updatedthreshold amplitude. For each of the subbands, a value of correlation is calculatedbetween the representative transform coefficient and a normalized core encoded low-band transform coefficient. A subband having a largest value of correlation is selectedwhen the number of the extracted representative transform coefficients reaches thepredetermined number.
申请人：PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
地址：Torrance CA US
国籍：US
代理机构：Greenblum & Bernstein P.L.C.
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