基本信息:
- 专利标题： CODING GENERIC AUDIO SIGNALS AT LOW BITRATES AND LOW DELAY
- 申请号：EP24167694.9 申请日：2011-10-24
- 公开(公告)号：EP4372747A3 公开(公告)日：2024-08-14
- 发明人： VAILLANCOURT, Tommy , JELINEK, Milan
- 申请人： VoiceAge EVS LLC , VoiceAge EVS GmbH & Co. KG
- 申请人地址： US Newport Beach, CA 92660 620 Newport Center Drive Suite 1100
- 专利权人： VoiceAge EVS LLC,VoiceAge EVS GmbH & Co. KG
- 当前专利权人： VoiceAge EVS LLC,VoiceAge EVS GmbH & Co. KG
- 当前专利权人地址： US Newport Beach, CA 92660 620 Newport Center Drive Suite 1100
- 代理机构： Bosch Jehle Patentanwaltsgesellschaft mbH
- 优先权： US 637910P 2010.10.25
- 分案原申请号： 17175692.7 2017.06.13;11835383.8 2011.10.24
- 主分类号： G10L19/08
- IPC分类号： G10L19/08 ; G10L19/20 ; G10L19/02
摘要：
A mixed time-domain / frequency-domain coding device and method for coding an input sound signal, wherein a time-domain excitation contribution is calculated in response to the input sound signal. A cut-off frequency for the time-domain excitation contribution is also calculated in response to the input sound signal, and a frequency extent of the time-domain excitation contribution is adjusted in relation to this cut-off frequency. Following calculation of a frequency-domain excitation contribution in response to the input sound signal, the adjusted time-domain excitation contribution and the frequency-domain excitation contribution are added to form a mixed time-domain / frequency-domain excitation constituting a coded version of the input sound signal. In the calculation of the time-domain excitation contribution, the input sound signal may be processed in successive frames of the input sound signal and a number of sub-frames to be used in a current frame may be calculated. Corresponding encoder and decoder using the mixed time-domain / frequency-domain coding device are also described.
公开/授权文献:
- EP4372747A2 CODING GENERIC AUDIO SIGNALS AT LOW BITRATES AND LOW DELAY 公开/授权日：2024-05-22
IPC结构图谱:
| G | 物理 |
| --G10 | 乐器；声学 |
| ----G10L | 语言分析或合成；语言识别 |
| ------G10L19/00 | 用于冗余度下降情形的语音分析—合成技术；语音编码或解码 |
| --------G10L19/04 | .利用预测技术 |
| ----------G10L19/08 | ..激励函数的确定或编码；长期预测参数的确定或编码 |