专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

21. 发明申请

US20100228557A1 Method and apparatus for audio decoding 有权
标题翻译：用于音频解码的方法和装置
公开(公告)号：US20100228557A1
公开(公告)日：2010-09-09
申请号：US12772197
申请日：2010-05-01
申请人： Zhe Chen , Fuliang Yin , Xiaoyu Zhang , Jinliang Dai , Libin Zhang
发明人： Zhe Chen , Fuliang Yin , Xiaoyu Zhang , Jinliang Dai , Libin Zhang
IPC分类号： G10L19/00
CPC分类号： G10L19/24 , G10L21/038
摘要： A method for decoding an audio signal includes: obtaining a lower-band signal component of an audio signal corresponding to a received code stream when the audio signal switches from a first bandwidth to a second bandwidth which is narrower than the first bandwidth; extending the lower-band signal component to obtain higher-band information; performing a time-varying fadeout process on the higher-band information to obtain a processed higher-band signal component; and synthesizing the processed higher-band signal component and the obtained lower-band signal component. With the methods provided in the embodiments of the invention, when an audio signal has a switch from broadband to narrowband, a series of processes such as bandwidth detection, artificial band extension, time-varying fadeout process, and bandwidth synthesis, may be performed to make the switch to have a smooth transition from a broadband signal to a narrowband signal so that a comfortable listening experience may be achieved.
摘要翻译：一种对音频信号进行解码的方法包括：当音频信号从第一带宽切换到比第一带宽窄的第二带宽时，获得对应于接收到的码流的音频信号的低频带信号分量; 扩展低频带信号分量以获得更高频带信息; 对所述较高频带信息执行时变衰落处理以获得处理的较高频带信号分量; 并且合成所处理的较高频带信号分量和所获得的低频信号分量。利用本发明的实施例提供的方法，当音频信号具有从宽带到窄带的切换时，可以执行诸如带宽检测，人造带扩展，时变渐变处理和带宽合成之类的一系列处理使开关从宽带信号到窄带信号的平滑过渡，从而可以实现舒适的听觉体验。

IPRDB

热门服务

关于我们

友情链接

联系方式