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    Handling variable delay in objective speech quality assessment
    1.
    发明专利
    Handling variable delay in objective speech quality assessment 未知

    公开(公告)号：AU1319801A

    公开(公告)日：2001-05-08

    申请号：AU1319801

    申请日：2000-10-24

    Applicant: ERICSSON TELEFON AB L M

    Inventor： KARLSSON ANDERS ,  LUNDBERG JONAS ,  STEINARSON ARNE

    IPC: G10L19/00 ,  H04L1/24 ,  H04L1/20

    Abstract: A speech quality estimation technique that employs an arbitrary, speech quality estimation algorithm. The speech quality estimation technique analyzes a reference speech signal and a test speech signal, and based on this analysis, identifies the level of continuous delay variation, if any, and the location of and size of any intermittent delay variations along the test signal. The reference speech signal and/or the test speech signal are adjusted to account for continuous delay variation and intermittent delay variations, such that the reference speech signal and the test signal are similarly scaled with respect to the time domain. The reference speech signal and the test speech signal are then compared for the purpose of generating a speech quality estimation. The resulting speech quality estimation is then adjusted based on the level of continuous delay variation and any intermittent delay variations.

    3.
    发明专利
    未知

    公开(公告)号：DE60026058D1

    公开(公告)日：2006-04-20

    申请号：DE60026058

    申请日：2000-10-24

    Applicant: ERICSSON TELEFON AB L M

    Inventor： KARLSSON ANDERS ,  LUNDBERG JONAS ,  STEINARSON ARNE

    IPC: G10L19/00 ,  H04L1/20 ,  H04L1/24

    Abstract: A speech quality estimation technique that employs an arbitrary, speech quality estimation algorithm. The speech quality estimation technique analyzes a reference speech signal and a test speech signal, and based on this analysis, identifies the level of continuous delay variation, if any, and the location of and size of any intermittent delay variations along the test signal. The reference speech signal and/or the test speech signal are adjusted to account for continuous delay variation and intermittent delay variations, such that the reference speech signal and the test signal are similarly scaled with respect to the time domain. The reference speech signal and the test speech signal are then compared for the purpose of generating a speech quality estimation. The resulting speech quality estimation is then adjusted based on the level of continuous delay variation and any intermittent delay variations.

    5.
    发明专利
    未知

    公开(公告)号：DE60026058T2

    公开(公告)日：2006-09-28

    申请号：DE60026058

    申请日：2000-10-24

    Applicant: ERICSSON TELEFON AB L M

    Inventor： KARLSSON ANDERS ,  LUNDBERG JONAS ,  STEINARSON ARNE

    IPC: G10L19/00 ,  H04L1/20 ,  H04L1/24

    Abstract: A speech quality estimation technique that employs an arbitrary, speech quality estimation algorithm. The speech quality estimation technique analyzes a reference speech signal and a test speech signal, and based on this analysis, identifies the level of continuous delay variation, if any, and the location of and size of any intermittent delay variations along the test signal. The reference speech signal and/or the test speech signal are adjusted to account for continuous delay variation and intermittent delay variations, such that the reference speech signal and the test signal are similarly scaled with respect to the time domain. The reference speech signal and the test speech signal are then compared for the purpose of generating a speech quality estimation. The resulting speech quality estimation is then adjusted based on the level of continuous delay variation and any intermittent delay variations.

    6.
    发明专利
    未知

    公开(公告)号：SE0402988L

    公开(公告)日：2006-06-09

    申请号：SE0402988

    申请日：2004-12-08

    Applicant: ERICSSON TELEFON AB L M

    Inventor： LUNDBERG JONAS ,  HANNU HANS ,  NOHLGREN ANDERS

    IPC: H04L69/40 ,  H04M7/00 ,  H04W4/10 ,  H04W84/08 ,  H04W88/02

    Abstract: The present invention relates to a method and a user equipment arranged to communicate with at least a second user equipment in a VoIP service data transmission in a wireless communication system using a VoIP service, provided by an application server. The method comprises the steps of: receiving transmissions in form of a media stream from the at least one second user equipment; storing the data of the media stream; detecting whether an interruption of said transmissions having at least a minimum length has occurred during the VoIP service data transmission or expecting that an interruption of said transmissions having at least a minimum length will occur during the VoIP service data transmission, and if such an interruption is detected or expected, using a non-normative playout rate of the data at playout, thereby obtaining a more efficient interactivity in the user communication.

    7.
    发明专利
    未知

    公开(公告)号：SE520531C2

    公开(公告)日：2003-07-22

    申请号：SE0101677

    申请日：2001-05-11

    Applicant: ERICSSON TELEFON AB L M

    Inventor： LUNDBERG JONAS ,  NOHLGREN ANDERS

    IPC: G06F13/00 ,  G06F17/30

    Abstract: A method for presentation of media objects of a multimedia presentation document (104) in a device (105) for presentation of such documents. The media objects are stored in storage means (102), which are remotely located from said device (105) and connected to a network infrastructure (103). The method comprises the steps of: providing said multimedia presentation document with metadata relating to properties of the media objects; processing said metadata in the presentation device (105); determining when to fetch each of said media objects from the storage means (102) to the presentation device (105) via the network infrastructure (103) based on said processing; fetching the media objects from the storage means (102) at the determined moments and presenting the fetched media objects in the presentation device (105). The invention also relates to a multimedia presentation system, a multimedia presentation document, a computer program product and a multimedia presentation device.

    9.
    发明专利
    未知

    公开(公告)号：SE0101677D0

    公开(公告)日：2001-05-11

    申请号：SE0101677

    申请日：2001-05-11

    Applicant: ERICSSON TELEFON AB L M

    Inventor： LUNDBERG JONAS ,  NOHLGREN ANDERS

    IPC: G06F13/00 ,  G06F17/30 ,  G06F

    Abstract: A method for presentation of media objects of a multimedia presentation document (104) in a device (105) for presentation of such documents. The media objects are stored in storage means (102), which are remotely located from said device (105) and connected to a network infrastructure (103). The method comprises the steps of: providing said multimedia presentation document with metadata relating to properties of the media objects; processing said metadata in the presentation device (105); determining when to fetch each of said media objects from the storage means (102) to the presentation device (105) via the network infrastructure (103) based on said processing; fetching the media objects from the storage means (102) at the determined moments and presenting the fetched media objects in the presentation device (105). The invention also relates to a multimedia presentation system, a multimedia presentation document, a computer program product and a multimedia presentation device.

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