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    51.
    发明专利
    未知

    公开(公告)号：DE3883519T2

    公开(公告)日：1994-03-17

    申请号：DE3883519

    申请日：1988-03-08

    Applicant: IBM

    Inventor： BOTTAU FRANCOISE ,  GALAND CLAUDE ,  ROSSO MICHELE

    IPC: G10L19/06 ,  G10L19/12 ,  G10L9/14

    Abstract: The voice signal s(n) is filtered through a short-term predictive filter (13) tuned with PARCOR derived coefficients computed over a pre-emphasized s(n), said filter (13) providing a short-term residual r(n). Said r(n) signal is then processed through a first Code-Excited/Long-Term Predictive coder providing first couples of table address and gain data (k1, g1)'s. An error signal r min (n) is then derived by subtracting coded/decoded data from uncoded data. Then said error signal is processed through a second Code-Excited/ Long-Term Predictive coder providing second couples of data (k2, g2)'s. Full rate coding is achieved by multiplexing both couples (k1, g1)'s and (k2, g2)'s into a multi-rate frame; while switching to a lower rate is achieved through a mere delation of (g2, k2)'s from the full rate frame.

    52.
    发明专利
    未知

    公开(公告)号：DE3785189D1

    公开(公告)日：1993-05-06

    申请号：DE3785189

    申请日：1987-04-22

    Applicant: IBM

    Inventor： GALAND CLAUDE

    IPC: G10L21/04 ,  G10L7/00

    Abstract: A speech frequency bandwidth is split into a series of consectuive narrow sub-bands and each band is processed to derive from it phase samples and magnitude samples representative of the signal contents, and expressed in polar coordinates. The contents are slowed down or speeded up respectively by repeating phase and magnitude samples, or deleting them from the contents at a rate depending upon the desired slowing-down or speeding-up rate. Each sub-band of phase/magnitude data is then recombined to form a new sub-band signal, and the sub-band signals are recombined to form speech, slowed-down or speeded up relative to the input. Pref. the processing includes deriving an analytical signal comprising in-phase and quadrative components using complex quadrative mirror filters (COMF) and sampling-down by dropping every other sample.

    55.
    发明专利
    未知

    公开(公告)号：DE69331054T2

    公开(公告)日：2002-06-20

    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.

    56.
    发明专利
    未知

    公开(公告)号：DE69329709D1

    公开(公告)日：2001-01-04

    申请号：DE69329709

    申请日：1993-04-29

    Applicant: IBM

    Inventor： BASSO CLAUDE ,  CALVIGNAC JEAN ,  GALAND CLAUDE ,  GIROIRD DIDIER ,  VERPLANKEN FABRICE

    IPC: G06F13/00 ,  G06F15/16 ,  G06F15/177 ,  H04L12/18

    Abstract: A communications system comprises a memory which is shared by a plurality of users, each one receiving and transmitting messages to each other. In the present system, a message is composed of a plurality of data buffers stored in the memory and each data buffer is controlled and mapped to a unique direct control block (DCB) which stores the characteristics of said data buffer. The chaining of the DCB forms the whole message which may be multicast to a plurality of users. Therefore, in order to improve the performance of such communications system, one may duplicate the message as many times as necessary without re-writing the data in the personal storage of each user by using an indirect control block (ICB) which represents the message duplicated. Each ICB stores the characteristics of the message duplicated and points to a DCB. A field in the DCB enables to count the number of duplication of the message. The DCB and ICB stores different fields which are required in order to perform the operations of lease control block from the free queues, the operations of message enqueue in the user queue, the operations of message dequeue from the user queue, and the operations of message release to the free queues. Two separate free queues FDCBQ and FICBQ chaining the free DCB and ICB are provided and are controlled by two control blocks FDQCB and FIQCB. The present apparatus and method may also be used for multicasting data buffer which composes a message by adding new fields in the ICB. In this case, the message to be multicast may have a content different from the original one, which requires therefore that to each ICB correspond a unique DCB.

    57.
    发明专利
    未知

    公开(公告)号：AT144870T

    公开(公告)日：1996-11-15

    申请号：AT93480087

    申请日：1993-06-30

    Applicant: IBM

    Inventor： GALAND CLAUDE ,  MAUDUIT DANIEL ,  PAUPORTE ANDRE ,  SPAGNOL VICTOR ,  LEBIZAY GERALD ,  MUNIER JEAN-MARIE ,  SAINT-GEORGES ERIC

    IPC: H04L29/06

    Abstract: A high performance data packet buffering method and a programmable data communication adapter for high speed packet transmission networks are disclosed. The line adapter includes programmable processing means, for receiving and transmitting data packets of fixed or variable length. This system is characterized in that it comprises means for buffering (132) said data packets, means for identifying said buffering means and said data packets in said buffering means, means for queueing (Figure 15) in storing means (131) said identifying means in a single instruction, means for dequeueing (Figure 16) from said storing (131) means said identifying means in another single instruction , means for releasing said buffering means, Each instruction comprises up to three operations executed in parallel by said processing means : an arithmetical and logical (ALU) operation on said identifying means, a memory operation on said storing means, and a sequence operation.

    58.
    发明专利
    未知

    公开(公告)号：DE3853161T2

    公开(公告)日：1995-08-17

    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.

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