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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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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：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：WO2008089696A1
公开(公告)日：2008-07-31
申请号：PCT/CN2008/070142
申请日：2008-01-18
CPC classification number: G10L19/005 , G10L19/09 , G10L19/107
Abstract: A decoding method includes: receiving data frames from a coding end, if occurring a bad frame, computing and determining a pitch lag parameter of the bad frame, performing the decoding operation according to the determined pitch lag parameter of the bad frame, obtaining the decoded data, in which the processing procedure for determining the pitch lag parameter of the bad frame includes: firstly determining the number of successive bad frames occurred and the pitch lag parameter of previous frame, then adjusting the pitch lag parameter of said previous frame according to the number of said successive bad frames and a predetermined adjustment strategy, computing and obtaining the pitch lag parameter of the current bad frame; said predetermined adjustment strategy is that the pitch lag parameter of the current bad frame which is determined following the number change of successive bad frames fluctuates in a range of setting value.
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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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Patent Agency Ranking
公开(公告)号：WO2008067763A1
公开(公告)日：2008-06-12
申请号：PCT/CN2007/071171
申请日：2007-12-04
CPC classification number: G10L19/005
Abstract: A decoding method includes the following steps: data frames from the encoded end are received; if bad frames occurred, spectral parameters of current bad frames are calculated and determined, decoding operation is performed according to the calculated spectral parameters of the bad frames to obtain the decoded data, in which, the processing procedure for determining spectral parameters of the bad frames includes the following steps: firstly, the number of the successive bad frames at present, determined spectral parameters of previous good frames of bad frames and a constant mean of spectral parameters are determined; next, the spectral parameters of good frames are self-adaptive shifted towards the constant mean of the spectral parameter according to the number of the successive bad frames, and the spectral parameter information of the current bad frames is calculated and obtained. A decoding device applies the above method.
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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：WO2008138267A1
公开(公告)日：2008-11-20
申请号：PCT/CN2008/070931
申请日：2008-05-09
IPC: G01L19/14
CPC classification number: G10L19/26
Abstract: A post-processing method for realizing fundamental tone enhancement includes: obtaining a gain of decoded signal (1), judging if the gain exceeds a predetermined threshold (2), and processing long-term post-filtering for the decoded signal and outputting after determining that the gain exceeds the predetermined threshold (3).
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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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