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公开(公告)号：WO2010108458A1
公开(公告)日：2010-09-30
申请号：PCT/CN2010/071373
申请日：2010-03-27
CPC classification number: G10L25/78 , G10H1/0008 , G10H2210/046 , G10H2250/031 , G10L2025/783
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公开(公告)号：WO2008089705A1
公开(公告)日：2008-07-31
申请号：PCT/CN2008/070170
申请日：2008-01-23
CPC classification number: G10L19/18 , G10L19/0212 , G10L19/022 , G10L19/04
Abstract: An encoding method comprises acquiring an encoding data of data length for an overlapping portion of a corresponding previous frame based on the determined data length of the overlapping portion of the encoding data related to a current frame and a corresponding previous frame, after the previous frame is encoded with a first encoding mode and the current frame is encoded with a second encoding mode; the acquired encoding data from the previous frame and the encoding data of the current frame are encoded with the second encoding mode to acquire an encoding result. There are also a corresponding decoding method and an encoding apparatus, a decoding apparatus.
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公开(公告)号：WO2009089728A1
公开(公告)日：2009-07-23
申请号：PCT/CN2008/073728
申请日：2008-12-25
Applicant: 华为技术有限公司 , 西安电子科技大学 , 马鸿飞 , 郭庆巍 , 张海波 , 张波 , 许丽净 , 张清 , 许剑峰 , 李伟 , 杜正中 , 胡晨 , 杨毅 , 苗磊 , 齐峰岩
IPC: H04N7/52
CPC classification number: G10L21/038
Abstract: A method for high frequency band replication, which comprises: to filter the audio or voice signal to gain the low frequency sub-band and the high frequency sub-band; to determine the strategy of spectral band replication; to gain the correlation between said low frequency sub-band and high frequency sub-band according to said determined strategy of spectral band replication, and to select the low frequency sub-band as the replication frequency band for the high frequency sub-band according to said correlation, and to output the information of high frequency band replication parameters which includes the correspondence relation of the selected frequency band. The present invention else provides a method for high frequency band replication, which comprises: to receive the information of high frequency band replication parameters which includes the correspondence relation of the selected frequency band, and said correspondence relation of the selected frequency band is the relation between the high frequency sub-band and the corresponding low frequency sub-band thereof, which is determined by the correlation; In the high band, to replicate the high frequency sub-band by the low frequency sub-band according to said information of high frequency band replication parameters which includes the correspondence relation of the selected frequency band. Accordingly, the present invention provides a coder and decoder. The solution of the embodiment of the present invention can fulfill the high frequency replication more exactly.
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公开(公告)号：WO2009033375A1
公开(公告)日：2009-03-19
申请号：PCT/CN2008/070867
申请日：2008-05-04
IPC: G10L19/00
CPC classification number: G10L19/005 , G10L19/0204
Abstract: A method and apparatus of frame error concealment for highband signal are provided. The method comprises: computing the periodic intension of highband signal's pitch period information about lowband signal; judging whether the periodic intension is larger than or equal to the presetting threshold or not; if it is, executing the frame error concealment to highband signal of current lost frame using the method of pitch period repeating; if it is not, executing the error frame concealment to highband signal of current lost frame using the method of previous frame data repeating.
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公开(公告)号：WO2008151568A1
公开(公告)日：2008-12-18
申请号：PCT/CN2008/071253
申请日：2008-06-10
CPC classification number: H04L1/0083 , G10L19/005
Abstract: A frame compensation method is provided, which includes the following steps: obtaining the length of a lost frame and a correct frame; judging the length of a correct frame is integral power times of two of the length of a lost frame, then obtaining the data sequence whose length is same as the length of the lost frame according to the correct frame; compensating the lost frame according to the said data sequence, obtaining the compensated data frame. A frame compensation system is also provided, which includes: a first length obtaining module, a second length obtaining module, a data sequence obtaining module and compensation module. Lost frames with various formats are compensated according to correct frames with various formats, so that the limitation of the prior art that the lost frame with single format is justly compensated according to the correct frame with single format is conquered, and the effect of the data frame after compensation is better than that of filling comfort noise.
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Patent Agency Ranking
公开(公告)号：WO2008138263A1
公开(公告)日：2008-11-20
申请号：PCT/CN2008/070925
申请日：2008-05-09
IPC: G10L19/00
CPC classification number: G10L19/012
Abstract: A method for generating comfort noise parameters includes obtaining an energy feature value and a spectrum feature value of each frame of a series of frames including current frame (S201); selecting one energy feature value from the obtained energy feature value of each frame as an energy parameter of the current comfort noise; selecting a spectrum feature value from the obtained spectrum feature values of each frame, making a spectrum parameter of the corresponding frame of the selected spectrum feature value as the spectrum parameter of the current comfort noise (S202). A device for generating comfort noise is provided.
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公开(公告)号：WO2008110109A1
公开(公告)日：2008-09-18
申请号：PCT/CN2008/070458
申请日：2008-03-10
CPC classification number: G10L19/083
Abstract: A method for smoothing gains in a speech decoder includes: calculating speech parameter variation factors of current speech frame, and initially modifying a fixed code book gain of said current speech frame (201); determining the status of the current speech frame based on said speech parameter variation factors (202); smoothing the fixed code book gain of the current speech frame by using the fixed code book gain which is initially modified and a smoothing factor which is set for the status of the speech frame (203).
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公开(公告)号：WO2008110114A1
公开(公告)日：2008-09-18
申请号：PCT/CN2008/070470
申请日：2008-03-11
CPC classification number: G10L19/038 , H04N19/94
Abstract: A quantization encoding decoding method and device, mainly include: in the quantization encoding end, if the closest point value is not included in a base codebook, the encoding operation is performed by a processing mode of splitting the closest point value; in the quantization decoding end, the decoding operation is performed by a corresponding processing mode.
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公开(公告)号：WO2008067735A1
公开(公告)日：2008-06-12
申请号：PCT/CN2007/003798
申请日：2007-12-26
Abstract: A classing method for sound signal includes: receiving the sound signal, determining updating rate of background noise according to a spectral distribution parameter of a background noise and a spectral distribution parameter of the sound signal; updating the noise parameter according the updating rate, and classing the sound signal according to a sub-band energy parameter and the updated noise parameter. A classing device for sound signal applies above method.
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公开(公告)号：WO2008110116A1
公开(公告)日：2008-09-18
申请号：PCT/CN2008/070473
申请日：2008-03-11
CPC classification number: H04N19/94
Abstract: An implementing method for quantizing encoding a grid vector comprises selecting a new basic codebook in which all point within RE 8 point set are included directly and indirectly, their value in any dimension are less than or equal to 3, and the fourth level hyperspherical points in the basic codebook are entirely odd number point, so that part of the nearest neighbour points are only processed via a corresponding odd number quantizing, and then may be included within the basic codebook. There is also a corresponding decoding method and an encoding device, a decoding device.
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