公开(公告)号：DE3688980D1

公开(公告)日：1993-10-07

申请号：DE3688980

申请日：1986-10-30

Applicant: IBM

Inventor： ROSSO MICHELE ,  GALAND CLAUDE

IPC: G10L19/02 ,  G10L19/00 ,  H03M1/12 ,  H03M7/30 ,  H04B1/66 ,  H04B14/04

Abstract: A process for multirate subband encoding voice signals. At least a portion of the original signal bandwidth is plit into p sub-bands the contents of which is to be coded using dynamic allocation of quantizing levels throughout the sub-bands. Let's assume the signal is to be coded for a set of coding rates R(1) Then the sub-band samples S(i,j) are quantized according to 1(i; R(K). And, finally the obtained quantized sub-band samples are embedded into a multirate frame.

公开(公告)号：DE3783905T2

公开(公告)日：1993-08-19

申请号：DE3783905

申请日：1987-03-05

Applicant: IBM

Inventor： GALAND CLAUDE ,  ROSSO MICHELE ,  LIETHOUDT THIERRY ,  ELIE PHILIPPE ,  LANCON EMMANUEL ,  CREPY HUBERT

IPC: G01H3/04 ,  G10L19/08 ,  G10L9/14

公开(公告)号：CA1285071C

公开(公告)日：1991-06-18

申请号：CA535921

申请日：1987-04-29

Applicant: IBM

Inventor： GALAND CLAUDE ,  MENEZ JEAN

IPC: H04B14/04 ,  G10L19/06 ,  H03M7/30 ,  G10L9/00

Abstract: The voice signal is analyzed to derive therefrom a low frequency base band signal, linear prediction coefficients and HF descriptors. Said HF descriptors include HF energy indications as well as indications relative to the phase shift between the low frequency and the high frequency band. Said HF descriptors are used during the voice synthesis operation to provide an inphase HF bandwidth component to be added to the base band prior to be used for driving a linear prediction synthesis filter tuned using said linear prediction parameters. Fig. 2 FR 9 85 008

公开(公告)号：FR2389277A1

公开(公告)日：1978-11-24

申请号：FR7713995

申请日：1977-04-29

Applicant: IBM FRANCE

Inventor： CROISIER ALAIN ,  ESTEBAN DANIEL ,  GALAND CLAUDE

IPC: H03M1/00 ,  G10L19/02 ,  H03M7/30 ,  H04B1/66 ,  H04B14/04 ,  H03K13/01

Abstract: A coding process, given a total number of available bits per unit time, allocates to each of a plurality of signal channels a number of bits proportional to information in the channel. The process is useful for transcoding BCPCM (Block Coded PCM) voice signals for lower bit rate and conserving transmission channel bandwidth.

公开(公告)号：DE60130844D1

公开(公告)日：2007-11-22

申请号：DE60130844

申请日：2001-07-05

Applicant: IBM

Inventor： GALAND CLAUDE ,  LE PENNEC JEAN-FRANCOIS

IPC: H04L45/02

Abstract: Data communication system of the type wherein a plurality of contiguous transmission networks constitute an Autonomous System (AS) using the Open Shortest Path First (OSPF) protocol for the exchange of information. The system is divided into several areas including an area 0 or backbone responsible for distributing routing information between the other areas. The backbone is divided into two sub-areas and comprises at least a pair of adjacent splitting routers. The first splitting router is included in one sub-area and the second splitting router is included in the other sub-area. The topological data base of each splitting router is configured to define a high metric for the link between the splitting routers in order to prevent any type of data traffic other than link-state messages (LSA) from being transmitted between the splitting routers.

公开(公告)号：DE69331054D1

公开(公告)日：2001-12-06

申请号：DE69331054

申请日：1993-07-30

Applicant: IBM

Inventor： GALAND CLAUDE ,  SCOTTON PAOLO

IPC: H04L12/24 ,  H04L12/56

Abstract: The object of the invention is to perform an automatic decomposition of a packet switching network in backbone nodes and subareas nodes to speed up the routing path search without degrading the optimization criterion of the routing algorithm and without generating additional control messages on the network. Currently, routing algorithms compute all the available paths in the network, from the source node to the destination node before to select an optimal route. However, networks are rarely fully meshed. They are usually built around a hierarchical structure : a set of nodes, interconnected by high throughput lines, are used to build a backbone with a high degree of meshing and then, local nodes are grouped in geographical subareas themselves attached to the backbone. Routing algorithms can take advantage of this particular network topology to drastically reduce the complexity of paths computation. For a given connection, only a limited number of nodes are defined as usable and are taken in account by the algorithm in its path calculation.

公开(公告)号：CA2153446A1

公开(公告)日：1996-03-20

申请号：CA2153446

申请日：1995-07-07

Applicant: IBM

Inventor： DUAULT MAURICE ,  GALAND CLAUDE

IPC: H04Q3/00 ,  H04L12/56 ,  H04Q11/04

Abstract: The invention relates to a method for dynamically changing the bit rate or bandwidth of constant bit rate data structures in an Asynchronous Transfer Mode (ATM) communications environment. The method is caracterized in that it includes the steps of: a) defining within said data channel a Change Indicator (CI) indicative of an end user's request for a bit rate change within said data structures; b) continuously transmitting said Change Indicator from the source side to the destination side, along with the data structures on said data channel; c) upon receipt at said destination side of a user's request of a bit rate change, modifying the value of said Change Indicator; d) at said source side, acknowledging the modification of the value of said Change Indicator, whereby the transmission of data structures continues on the data channel with a new constant bit rate .

公开(公告)号：DE3853161D1

公开(公告)日：1995-03-30

申请号：DE3853161

申请日：1988-10-19

Applicant: IBM

Inventor： GALAND CLAUDE ,  MENEZ JEAN ,  ROSSO MICHELE

IPC: H03M7/30 ,  G06T9/00 ,  G10L19/06 ,  G10L9/14

Abstract: A signal vector quantizing coder (CELP) is provided with an adaptive codebook originally loaded with preselected codewords. The codebook is split into a fixed contents portion and a fixed length adaptive contents portion. During coding operations, the codewords dynamically selected for coding the coder input signal are shifted into the fixed length adaptive codebook section for codebook contents updating purposes.

公开(公告)号：CA2123441A1

公开(公告)日：1995-01-31

申请号：CA2123441

申请日：1994-05-12

Applicant: IBM

Inventor： GALAND CLAUDE ,  SCOTTON PAOLO

IPC: H04L12/24 ,  H04L12/56

Abstract: The object of the invention is to perform an automatic decomposition of a packet switching network in backbone nodes and subareas nodes to speed up the routing path search without degrading the optimization criterion of the routing algorithm and without generating additional control messages on the network. Currently, routing algorithms compute all the available paths in the network, from the source node to the destination node before to select an optimal route. However, networks are rarely fully meshed. They are usually built around a hierarchical structure : a set of nodes, interconnected by high throughput lines, are used to build a backbone with a high degree of meshing and then, local nodes are grouped in geographical subareas themselves attached to the backbone. Routing algorithms can take advantage of this particular network topology to drastically reduce the complexity of paths computation. For a given connection, only a limited number of nodes are defined as usable and are taken in account by the algorithm in its path calculation.

公开(公告)号：DE3851887D1

公开(公告)日：1994-11-24

申请号：DE3851887

申请日：1988-07-18

Applicant: IBM

Inventor： ROSSO MICHELE ,  GALAND CLAUDE

IPC: G06F3/16 ,  G10L19/06 ,  H03M1/12 ,  H03M7/30 ,  H04B14/04 ,  H04Q1/457 ,  G10L9/14