专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

32. 发明专利

DE602004007786T2 未知
公开(公告)号：DE602004007786T2
公开(公告)日：2008-04-30
申请号：DE602004007786
申请日：2004-03-12
申请人： NOKIA CORP
发明人： JELINEK MILAN , SALAMI REDWAN
IPC分类号： G10L19/08 , G10L19/14

33. 发明专利

DE602004007786D1 未知
公开(公告)号：DE602004007786D1
公开(公告)日：2007-09-06
申请号：DE602004007786
申请日：2004-03-12
申请人： NOKIA CORP
发明人： JELINEK MILAN , SALAMI REDWAN
IPC分类号： G10L19/08 , G10L19/14

34. 发明专利

AT368279T 未知
公开(公告)号：AT368279T
公开(公告)日：2007-08-15
申请号：AT04719892
申请日：2004-03-12
申请人： NOKIA CORP
发明人： JELINEK MILAN , SALAMI REDWAN
IPC分类号： G10L19/08 , G10L19/14

35. 发明专利

BRPI0418449A 未知
公开(公告)号：BRPI0418449A
公开(公告)日：2007-05-22
申请号：BRPI0418449
申请日：2004-12-29
申请人： NOKIA CORP
发明人： JELINEK MILAN
IPC分类号： G10L21/0232
摘要： In one aspect thereof the invention provides a method for noise suppression of a speech signal that includes, for a speech signal having a frequency domain representation dividable into a plurality of frequency bins, determining a value of a scaling gain for at least some of said frequency bins and calculating smoothed scaling gain values. Calculating smoothed scaling gain values includes, for the at least some of the frequency bins, combining a currently determined value of the scaling gain and a previously determined value of the smoothed scaling gain. In another aspect a method partitions the plurality of frequency bins into a first set of contiguous frequency bins and a second set of contiguous frequency bins having a boundary frequency there between, where the boundary frequency differentiates between noise suppression techniques, and changes a value of the boundary frequency as a function of the spectral content of the speech signal.

36. 发明专利

HK1082315A1 Method and device for gain quantization in variable bit rate wideband speech coding 未知
公开(公告)号：HK1082315A1
公开(公告)日：2006-06-02
申请号：HK06101938
申请日：2006-02-15
申请人： NOKIA CORP
发明人： JELINEK MILAN , SALAMI REDWAN
IPC分类号： G10L19/08 , G10L19/14

37. 发明专利

BR0317652A 未知
公开(公告)号：BR0317652A
公开(公告)日：2005-12-06
申请号：BR0317652
申请日：2003-12-18
申请人： NOKIA CORP
发明人： JELINEK MILAN
IPC分类号： G10L19/038 , G10L19/12 , G10L19/14 , G10L19/02
摘要： The exemplary embodiments of this invention relate to a method and device for quantizing linear prediction parameters in variable bit-rate sound signal coding, in which an input linear prediction parameter vector is received, a sound signal frame corresponding to the input linear prediction parameter vector is classified, a prediction vector is computed, the computed prediction vector is removed from the input linear prediction parameter vector to produce a prediction error vector, and the prediction error vector is quantized. Computation of the prediction vector comprises selecting one of a plurality of prediction schemes in relation to the classification of the sound signal frame, and processing the prediction error vector through the selected prediction scheme. The exemplary embodiments of this invention further relate to a method and device for dequantizing linear prediction parameters in variable bit-rate sound signal decoding.

38. 发明专利

BR0315179A 未知
公开(公告)号：BR0315179A
公开(公告)日：2005-08-23
申请号：BR0315179
申请日：2003-10-09
申请人： NOKIA CORP
发明人： JELINEK MILAN
IPC分类号： G01L19/14 , G10L19/02 , G10L19/14 , G10L21/02 , G10L25/90 , G10L19/00
摘要： A source-controlled Variable bit-rate Multi-mode WideBand (VMR-WB) codec, having a mode of operation that is interoperable with the Adaptive Multi-Rate wideband (AMR-WB) codec, the codec comprising: at least one Interoperable full-rate (I-FR) mode, having a first bit allocation structure based on one of a AMR-WB codec coding types; and at least one comfort noise generator (CNG) coding type for encoding inactive speech frame having a second bit allocation structure based on AMR-WB SID_UPDATE coding type. Methods for i) digitally encoding a sound using a source-controlled Variable bit rate multi-mode wideband (VMR-WB) codec for interoperation with an adaptative multi-rate wideband (AMR-WB) codec, ii) translating a Variable bit rate multi-mode wideband (VMR-WB) codecsignal frame into an Adaptive Multi-Rate wideband (AMR-WB) signal frame, iii) translating an Adaptive Multi-Rate wideband (AMR-WB) signal frame into a Variable bit rate multi-mode wideband (VMR-WB) signal frame, and iv) translating an Adaptive Multi-Rate wideband (AMR-WB) signal frame into a Variable bit rate multi-mode wideband (VMR-WB) signal frame are also provided.

39. 发明专利

AU2004309431A1 Method and device for speech enhancement in the presence of background noise 未知
公开(公告)号：AU2004309431A1
公开(公告)日：2005-07-14
申请号：AU2004309431
申请日：2004-12-29
申请人： NOKIA CORP
发明人： JELINEK MILAN
IPC分类号： G10L21/0232
摘要： In one aspect thereof the invention provides a method for noise suppression of a speech signal that includes, for a speech signal having a frequency domain representation dividable into a plurality of frequency bins, determining a value of a scaling gain for at least some of said frequency bins and calculating smoothed scaling gain values. Calculating smoothed scaling gain values includes, for the at least some of the frequency bins, combining a currently determined value of the scaling gain and a previously determined value of the smoothed scaling gain. In another aspect a method partitions the plurality of frequency bins into a first set of contiguous frequency bins and a second set of contiguous frequency bins having a boundary frequency there between, where the boundary frequency differentiates between noise suppression techniques, and changes a value of the boundary frequency as a function of the spectral content of the speech signal.

40. 发明专利

HK1069472A1 Signal modification method for efficient coding ofspeech signals 未知
公开(公告)号：HK1069472A1
公开(公告)日：2005-05-20
申请号：HK05101816
申请日：2005-03-02
申请人： NOKIA CORP
发明人： TAMMI MIKKO , JELINEK MILAN , LAFLAMME CLAUDE , RUOPPILA VESA
IPC分类号： G10L19/12
摘要： For determining a long-term-prediction delay parameter characterizing a long term prediction in a technique using signal modification for digitally encoding a sound signal, the sound signal is divided into a series of successive frames, a feature of the sound signal is located in a previous frame, a corresponding feature of the sound signal is located in a current frame, and the long-term-prediction delay parameter is determined for the current frame while mapping, with the long term prediction, the signal feature of the previous frame with the corresponding signal feature of the current frame. In a signal modification method for implementation into a technique for digitally encoding a sound signal, the sound signal is divided into a series of successive frames, each frame of the sound signal is partitioned into a plurality of signal segments, and at least a part of the signal segments of the frame are warped while constraining the warped signal segments inside the frame. For searching pitch pulses in a sound signal, a residual signal is produced by filtering the sound signal through a linear prediction analysis filter, a weighted sound signal is produced by processing the sound signal through a weighting filter, the weighted sound signal being indicative of signal periodicity, a synthesized weighted sound signal is produced by filtering a synthesized speech signal produced during a last subframe of a previous frame of the sound signal through the weighting filter, a last pitch pulse of the sound signal of the previous frame is located from the residual signal, a pitch pulse prototype of given length is extracted around the position of the last pitch pulse of the sound signal of the previous frame using the synthesized weighted sound signal, and the pitch pulses are located in a current frame using the pitch pulse prototype.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式