发明名称 |
SIGNAL PROCESSING DEVICE AND METHOD, ENCODING DEVICE AND METHOD, DECODING DEVICE AND METHOD, AND PROGRAMS THEREFOR |
摘要 |
The present invention relates to a signal processing apparatus and a signal processing method, an encoder and an encoding method, a decoder and a decoding method, and a program capable of reproducing music signal having a better sound quality by expansion of frequency band. A sampling frequency conversion unit converts a sampling frequency of an input signal, and a sub-band division circuit divides the input signal after the sampling conversion into sub-band signals of sub-bands having the number corresponding to the sampling frequency. A pseudo high band sub-band power calculation circuit calculates pseudo high band sub-band powers based on low band signals of the input signal and coefficient tables having coefficients for the respective high band sub-bands. Apseudo high band sub-band power difference calculation circuit compares high band sub-band powers and the pseudo high band sub-band powers to each other and selects a coefficient table from plural coefficient tables. In addition, a coefficient index which specifies the coefficient table is encoded and set as high band encoded data. The present invention can be applied to an encoder. |
申请公布号 |
EP2560166(B1) |
申请公布日期 |
2015.03.18 |
申请号 |
EP20110768825 |
申请日期 |
2011.04.11 |
申请人 |
SONY CORPORATION |
发明人 |
YAMAMOTO YUKI;CHINEN TORU;HONMA HIROYUKI;MITSUFUJI YUHKI |
分类号 |
G10L21/0388;G10L19/02;G10L19/16;G10L21/02;G10L21/038 |
主分类号 |
G10L21/0388 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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