公开(公告)号：EP1832055A4

公开(公告)日：2012-02-22

申请号：EP05854790

申请日：2005-12-15

申请人： DILITHIUM NETWORKS PTY LTD

发明人： JABRI MARWAN A ,  WONG ALBERT C ,  KENRICK BRODY ,  JONGBLOED ROBERT ,  JACK DAVID

IPC分类号： H04L12/28 ,  H04L12/56 ,  H04L29/06

CPC分类号： H04Q3/0045 ,  H04L29/06027 ,  H04L65/1009 ,  H04L65/1069 ,  H04Q2213/13109 ,  H04Q2213/13204 ,  H04Q2213/13248 ,  H04Q2213/13337 ,  H04Q2213/13396

公开(公告)号：EP1483758A4

公开(公告)日：2007-04-11

申请号：EP03711590

申请日：2003-03-12

申请人： DILITHIUM NETWORKS PTY LTD

发明人： JABRI MARWAN A ,  WANG JIAN WEI ,  GEORGY SAMEH ,  IBRAHIM MICHAEL

IPC分类号： G10L19/02 ,  G10L19/14 ,  G10L19/08

CPC分类号： G10L19/173 ,  G10L19/09

摘要： An apparatus for processing adaptive codebook pitch lag from one CELP based standard to another CELP based standard. The apparatus has various modules that perform at least the functionality described herein. The apparatus includes a time-base subframe checker inspection module, which is adapted to associate one or more incoming subframes with an outgoing subframes of a destination codec. The apparatus also has a decision module coupled to the time-base subframe inspection module. The decision module is adapted to determine a desired pitch lag parameter from a plurality of pitch lag parameters among respective two or more incoming subframes. The apparatus has a pitch lag selection module coupled to the decision module. The pitch lag selection module is adapted to select the desired pitch lag parameter.

公开(公告)号：EP1554809A4

公开(公告)日：2007-11-21

申请号：EP03757539

申请日：2003-10-24

申请人： DILITHIUM NETWORKS PTY LTD

发明人： JABRI MARWAN A ,  CHONG-WHITE NICOLA ,  WANG JIANWEI

IPC分类号： G06F17/00 ,  G10L19/10 ,  G10L19/14 ,  H03M7/30

CPC分类号： G10L19/173

摘要： An apparatus and method for mapping CELP parameters between a source codec and a destination codec. The apparatus includes an LSP mapping module, an adaptive codebook mapping module coupled to the LSP mapping module, and a fixed codebook mapping module coupled to the LSP mapping module and the adaptive codebook mapping module. The LSP mapping module includes an LP overflow module and an LSP parameter modification module. The adaptive codebook mapping module includes a first pitch gain codebook. The fixed codebook mapping module includes a first target processing module, a pulse search module, a fixed codebook gain estimation module, a pulse position searching module.

公开(公告)号：EP1523808A4

公开(公告)日：2011-01-19

申请号：EP03764716

申请日：2003-07-15

申请人： DILITHIUM NETWORKS PTY LTD

发明人： BROWN STEPHEN F ,  JABRI MARWAN A

IPC分类号： H04N7/32 ,  H03M7/40 ,  H04B1/66 ,  H04N20060101 ,  H04N7/12 ,  H04N7/26 ,  H04N7/30 ,  H04N7/50

CPC分类号： H04N19/59 ,  H04N19/107 ,  H04N19/132 ,  H04N19/176 ,  H04N19/40 ,  H04N19/426 ,  H04N19/48 ,  H04N19/513 ,  H04N19/55 ,  H04N19/593 ,  H04N19/61 ,  H04N19/85

公开(公告)号：EP1464047A4

公开(公告)日：2005-12-07

申请号：EP03705707

申请日：2003-01-08

申请人： DILITHIUM NETWORKS PTY LTD

发明人： JABRI MARWAN A ,  WANG JIANWEI ,  GOULD STEPHEN

IPC分类号： G10L19/16 ,  H03M7/30 ,  G10L19/14

CPC分类号： G10L19/173

摘要： Transcoding a CELP based compressed voice bitstream from source codec to destination codec relate to embodiments of a system and method. The method includes processing a source codec input bitstream to unpack (1) CELP parameters from the input CELP bistream and may interpolate (2) the unpacked CELP parameters from is a difference of destination codec parameters and source codec parameters exists. If the method maps (4) CELP from source codec format to a destination codec format, the parameter mapping strategy may be singly preset or selected (3). The method inludes encoding the CELP parameters for the destination codec and processing a destination CELP bitstream by packing (7) the CELP parameters for the destination codec.