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1. 发明申请

US20130006622A1 ADAPTIVE CONFERENCE COMFORT NOISE 有权
标题翻译：适应会议舒适的噪音
公开(公告)号：US20130006622A1
公开(公告)日：2013-01-03
申请号：US13170567
申请日：2011-06-28
申请人： Hosam Khalil , Xiaoqin Sun , Hong Wang Sodoma , Warren Lam
发明人： Hosam Khalil , Xiaoqin Sun , Hong Wang Sodoma , Warren Lam
IPC分类号： G10L15/20
CPC分类号： G10L19/012 , H04M3/568 , H04M2203/352
摘要： A continuous comfort noise is provided that is overlaid for the entire duration of a conference call scenario. The comfort noise may be adapted to match the levels of the actual background noise detected on one or more of the conference call participant's devices on the transmitting end(s) of a conference call as well as the participants' speech levels. The comfort noise may also be adapted to the type of listening device employed on the receiving end of a conference call. The comfort noise level may be customized to an appropriate and comfortable level for the type of listening device being used, and the system may continuously mix the comfort noise with incoming audio signals for the entire duration of a conference call, lowering the comfort noise level gradually during speaking periods for additional user experience improvement.
摘要翻译：提供连续的舒适噪声，其在电话会议场景的整个持续时间内被覆盖。舒适噪声可以适于匹配在电话会议的发送端上的一个或多个电话会议参与者设备上检测到的实际背景噪声的电平以及参与者的语音电平。舒适噪声也可以适应于在电话会议的接收端采用的听音装置的类型。可以将舒适噪声水平定制为适用于所使用的听音装置类型的舒适水平，并且系统可以在电话会议的整个持续时间内将舒适噪声与输入音频信号连续混合，逐渐降低舒适噪声电平在演讲期间，为了增加用户体验。

2. 发明授权

US08589153B2 Adaptive conference comfort noise 有权
标题翻译：自适应会议舒适噪音
公开(公告)号：US08589153B2
公开(公告)日：2013-11-19
申请号：US13170567
申请日：2011-06-28
申请人： Hosam Khalil , Xiaoqin Sun , Hong Wang Sodoma , Warren Lam
发明人： Hosam Khalil , Xiaoqin Sun , Hong Wang Sodoma , Warren Lam
IPC分类号： G10L21/00
CPC分类号： G10L19/012 , H04M3/568 , H04M2203/352
摘要： A continuous comfort noise is provided that is overlaid for the entire duration of a conference call scenario. The comfort noise may be adapted to match the levels of the actual background noise detected on one or more of the conference call participant's devices on the transmitting end(s) of a conference call as well as the participants' speech levels. The comfort noise may also be adapted to the type of listening device employed on the receiving end of a conference call. The comfort noise level may be customized to an appropriate and comfortable level for the type of listening device being used, and the system may continuously mix the comfort noise with incoming audio signals for the entire duration of a conference call, lowering the comfort noise level gradually during speaking periods for additional user experience improvement.
摘要翻译：提供连续的舒适噪声，其在电话会议场景的整个持续时间内被覆盖。舒适噪声可以适于匹配在电话会议的发送端上的一个或多个电话会议参与者设备上检测到的实际背景噪声的电平以及参与者的语音电平。舒适噪声也可以适应于在电话会议的接收端采用的听音装置的类型。可以将舒适噪声水平定制为适用于所使用的聆听装置类型的舒适水平，并且系统可以在电话会议的整个持续时间内将舒适噪声与输入音频信号连续混合，逐渐降低舒适噪声电平在演讲期间，为了增加用户体验。

3. 发明申请

US20080040121A1 Sub-band voice codec with multi-stage codebooks and redundant coding 有权
标题翻译：具有多级码本和冗余编码的子带语音编解码器
公开(公告)号：US20080040121A1
公开(公告)日：2008-02-14
申请号：US11973690
申请日：2007-10-09
申请人： Tian Wang , Kazuhito Koishida , Hosam Khalil , Xiaoqin Sun , Wei-Ge Chen
发明人： Tian Wang , Kazuhito Koishida , Hosam Khalil , Xiaoqin Sun , Wei-Ge Chen
IPC分类号： G10L19/00
CPC分类号： G10L19/005 , G10L19/12 , G10L2019/0005
摘要： Techniques and tools related to coding and decoding of audio information are described. For example, redundant coded information for decoding a current frame includes signal history information associated with only a portion of a previous frame. As another example, redundant coded information for decoding a coded unit includes parameters for a codebook stage to be used in decoding the current coded unit only if the previous coded unit is not available. As yet another example, coded audio units each include a field indicating whether the coded unit includes main encoded information representing a segment of an audio signal, and whether the coded unit includes redundant coded information for use in decoding main encoded information.
摘要翻译：描述与音频信息的编码和解码相关的技术和工具。例如，用于解码当前帧的冗余编码信息包括仅与先前帧的一部分相关联的信号历史信息。作为另一示例，用于对已编码单元进行解码的冗余编码信息包括仅当前一编码单元不可用时才将用于解码当前编码单元的码本级的参数。作为另一示例，编码音频单元各自包括指示编码单元是否包括表示音频信号的段的主编码信息的字段，以及编码单元是否包括用于解码主编码信息的冗余编码信息。

4. 发明申请

US20060271354A1 Audio codec post-filter 有权
标题翻译：音频编解码后置滤波器
公开(公告)号：US20060271354A1
公开(公告)日：2006-11-30
申请号：US11142603
申请日：2005-05-31
申请人： Xiaoqin Sun , Tian Wang , Hosam Khalil , Kazuhito Koishida , Wei-Ge Chen
发明人： Xiaoqin Sun , Tian Wang , Hosam Khalil , Kazuhito Koishida , Wei-Ge Chen
IPC分类号： G10L19/14
CPC分类号： G10L19/26
摘要： Techniques and tools are described for processing reconstructed audio signals. For example, a reconstructed audio signal is filtered in the time domain using filter coefficients that are calculated, at least in part, in the frequency domain. As another example, producing a set of filter coefficients for filtering a reconstructed audio signal includes clipping one or more peaks of a set of coefficient values. As yet another example, for a sub-band codec, in a frequency region near an intersection between two sub-bands, a reconstructed composite signal is enhanced.
摘要翻译：描述了处理重建音频信号的技术和工具。例如，使用至少部分地在频域中计算的滤波器系数在时域中对重构音频信号进行滤波。作为另一示例，产生用于对重构音频信号进行滤波的滤波器系数的集合包括限定一组系数值的一个或多个峰值。作为另一示例，对于子带编解码器，在两个子带之间的交叉点附近的频率区域中，重构的复合信号被增强。

5. 发明申请

US20060271373A1 Robust decoder 有权
公开(公告)号：US20060271373A1
公开(公告)日：2006-11-30
申请号：US11142602
申请日：2005-05-31
申请人： Hosam Khalil , Tian Wang , Kazuhito Koishida , Xiaoqin Sun , Wei-Ge Chen
发明人： Hosam Khalil , Tian Wang , Kazuhito Koishida , Xiaoqin Sun , Wei-Ge Chen
IPC分类号： G10L21/00
CPC分类号： G10L21/045 , G10L19/005
摘要： Techniques and tools related to delayed or lost coded audio information are described. For example, a concealment technique for one or more missing frames is selected based on one or more factors that include a classification of each of one or more available frames near the one or more missing frames. As another example, information from a concealment signal is used to produce substitute information that is relied on in decoding a subsequent frame. As yet another example, a data structure having nodes corresponding to received packet delays is used to determine a desired decoder packet delay value.

6. 发明申请

US20060271359A1 Robust decoder 有权
公开(公告)号：US20060271359A1
公开(公告)日：2006-11-30
申请号：US11197792
申请日：2005-08-04
申请人： Hosam Khalil , Tian Wang , Kazuhito Koishida , Xiaoqin Sun , Wei-Ge Chen
发明人： Hosam Khalil , Tian Wang , Kazuhito Koishida , Xiaoqin Sun , Wei-Ge Chen
IPC分类号： G10L21/02
CPC分类号： G10L21/045 , G10L19/005
摘要： Techniques and tools related to delayed or lost coded audio information are described. For example, a concealment technique for one or more missing frames is selected based on one or more factors that include a classification of each of one or more available frames near the one or more missing frames. As another example, information from a concealment signal is used to produce substitute information that is relied on in decoding a subsequent frame. As yet another example, a data structure having nodes corresponding to received packet delays is used to determine a desired decoder packet delay value.

7. 发明申请

US20060271355A1 SUB-BAND VOICE CODEC WITH MULTI-STAGE CODEBOOKS AND REDUNDANT CODING 有权
标题翻译：具有多级代码和冗余编码的子带语音编解码器
公开(公告)号：US20060271355A1
公开(公告)日：2006-11-30
申请号：US11142605
申请日：2005-05-31
申请人： Tian Wang , Kazuhito Koishida , Hosam Khalil , Xiaoqin Sun , Wei-Ge Chen
发明人： Tian Wang , Kazuhito Koishida , Hosam Khalil , Xiaoqin Sun , Wei-Ge Chen
IPC分类号： G10L19/00
CPC分类号： G10L19/005 , G10L19/12 , G10L2019/0005
摘要： Techniques and tools related to coding and decoding of audio information are described. For example, redundant coded information for decoding a current frame includes signal history information associated with only a portion of a previous frame. As another example, redundant coded information for decoding a coded unit includes parameters for a codebook stage to be used in decoding the current coded unit only if the previous coded unit is not available. As yet another example, coded audio units each include a field indicating whether the coded unit includes main encoded information representing a segment of an audio signal, and whether the coded unit includes redundant coded information for use in decoding main encoded information.
摘要翻译：描述与音频信息的编码和解码相关的技术和工具。例如，用于解码当前帧的冗余编码信息包括仅与先前帧的一部分相关联的信号历史信息。作为另一示例，用于对已编码单元进行解码的冗余编码信息包括仅当前一编码单元不可用时才将用于解码当前编码单元的码本级的参数。作为另一示例，编码音频单元各自包括指示编码单元是否包括表示音频信号的段的主编码信息的字段，以及编码单元是否包括用于解码主编码信息的冗余编码信息。

8. 发明申请

US20080040105A1 Sub-band voice codec with multi-stage codebooks and redundant coding 有权
公开(公告)号：US20080040105A1
公开(公告)日：2008-02-14
申请号：US11973689
申请日：2007-10-09
申请人： Tian Wang , Kazuhito Koishida , Hosam Khalil , Xiaoqin Sun , Wei-Ge Chen
发明人： Tian Wang , Kazuhito Koishida , Hosam Khalil , Xiaoqin Sun , Wei-Ge Chen
IPC分类号： G10L19/12
CPC分类号： G10L19/005 , G10L19/12 , G10L2019/0005
摘要： Techniques and tools related to coding and decoding of audio information are described. For example, redundant coded information for decoding a current frame includes signal history information associated with only a portion of a previous frame. As another example, redundant coded information for decoding a coded unit includes parameters for a codebook stage to be used in decoding the current coded unit only if the previous coded unit is not available. As yet another example, coded audio units each include a field indicating whether the coded unit includes main encoded information representing a segment of an audio signal, and whether the coded unit includes redundant coded information for use in decoding main encoded information.

9. 发明申请

US20060271357A1 Sub-band voice codec with multi-stage codebooks and redundant coding 有权
标题翻译：具有多级码本和冗余编码的子带语音编解码器
公开(公告)号：US20060271357A1
公开(公告)日：2006-11-30
申请号：US11197914
申请日：2005-08-04
申请人： Tian Wang , Kazuhito Koishida , Hosam Khalil , Xiaoqin Sun , Wei-Ge Chen
发明人： Tian Wang , Kazuhito Koishida , Hosam Khalil , Xiaoqin Sun , Wei-Ge Chen
IPC分类号： G10L19/12
CPC分类号： G10L19/005 , G10L19/12 , G10L2019/0005
摘要： Techniques and tools related to coding and decoding of audio information are described. For example, redundant coded information for decoding a current frame includes signal history information associated with only a portion of a previous frame. As another example, redundant coded information for decoding a coded unit includes parameters for a codebook stage to be used in decoding the current coded unit only if the previous coded unit is not available. As yet another example, coded audio units each include a field indicating whether the coded unit includes main encoded information representing a segment of an audio signal, and whether the coded unit includes redundant coded information for use in decoding main encoded information.
摘要翻译：描述与音频信息的编码和解码相关的技术和工具。例如，用于解码当前帧的冗余编码信息包括仅与先前帧的一部分相关联的信号历史信息。作为另一示例，用于对已编码单元进行解码的冗余编码信息包括仅当前一编码单元不可用时才将用于解码当前编码单元的码本级的参数。作为另一示例，编码音频单元各自包括指示编码单元是否包括表示音频信号的段的主编码信息的字段，以及编码单元是否包括用于解码主编码信息的冗余编码信息。

10. 发明申请

US20050131696A1 Frequency domain postfiltering for quality enhancement of coded speech 有权
公开(公告)号：US20050131696A1
公开(公告)日：2005-06-16
申请号：US11045907
申请日：2005-01-28
申请人： Hong Wang , Vladimir Cuperman , Allen Gersho , Hosam Khalil
发明人： Hong Wang , Vladimir Cuperman , Allen Gersho , Hosam Khalil
IPC分类号： G10L19/02 , G10L11/00 , G10L19/14 , G10L21/02 , H03M7/30 , G10L13/06
CPC分类号： G10L19/26 , G10L21/0364
摘要： A method and system of performing postfiltering in the frequency domain to improve the quality of a speech signal, especially for synthesized speech resulting from codecs of low bit-rate, is provided. The method comprises LPC tilt computation and compensation methods and modules, a formant filter gain computation method and module, and an anti-aliasing method and module. The formant filter gain calculation employs an LPC representation, an all-pole modeling, a non-linear transformation and a phase computation. The LPC used for deriving the postfilter may be transmitted from an encoder or may be estimated from a synthesized or other speech signal in a decoder or receiver. The invention may be implemented in a linked decoder and encoder. A separate LPC evaluation unit that is responsible for processing and or deriving the LPC may be implemented within the invention.

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