发明名称 |
SPEECH AUDIO ENCODING DEVICE, SPEECH AUDIO DECODING DEVICE, SPEECH AUDIO ENCODING METHOD, AND SPEECH AUDIO DECODING METHOD |
摘要 |
By the present invention, the number of encoding bits allocated to encoding of extended-band spectrum is reduced while degradation of sound quality in the extended band is suppressed. A band compression unit (105) creates combinations of sub-band spectra in pairs of two samples each in order from a low-range side in a band compression target sub-band, selects a spectrum having a large absolute-value amplitude among the combinations, and arranges the selected spectrum close to the low-range side on a frequency axis. A number-of-units recalculation unit (106) redistributes bits saved in the sub-band for which band compression was performed to a low range outside the extended band, and redistributes the number of units on the basis of the redistributed bits. |
申请公布号 |
WO2014068995(A1) |
申请公布日期 |
2014.05.08 |
申请号 |
WO2013JP06496 |
申请日期 |
2013.11.01 |
申请人 |
PANASONIC CORPORATION |
发明人 |
KAWASHIMA, TAKUYA;OSHIKIRI, MASAHIRO |
分类号 |
G10L19/032;G10L19/035 |
主分类号 |
G10L19/032 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|