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    2.
    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.

    4.
    发明专利
    未知

    公开(公告)号：BR9908968A

    公开(公告)日：2000-12-05

    申请号：BR9908968

    申请日：1999-03-10

    Applicant: ERICSSON TELEFON AB L M

    Inventor： KARLSSON ANDERS

    IPC: H04B7/26 ,  H04B17/00 ,  H04L1/20 ,  H04W16/14 ,  H04W36/20 ,  H04W72/08 ,  H04Q7/38

    Abstract: The carrier-to-interference ratio in a radio communication system is estimated by using measurements of the received signal strength in a communication channel within periods of time when transmission is discontinued and measurements of the received signal strength in the communication channel within periods of time with transmission.

    5.
    发明专利
    未知

    公开(公告)号：SE9800939D0

    公开(公告)日：1998-03-20

    申请号：SE9800939

    申请日：1998-03-20

    Applicant: ERICSSON TELEFON AB L M

    Inventor： KARLSSON ANDERS

    IPC: H04B7/26 ,  H04B17/00 ,  H04L1/20 ,  H04W16/14 ,  H04W36/20 ,  H04W72/08 ,  H04Q

    Abstract: The carrier-to-interference ratio in a radio communication system is estimated by using measurements of the received signal strength in a communication channel within periods of time when transmission is discontinued and measurements of the received signal strength in the communication channel within periods of time with transmission.

    SPEECH QUALITY MEASUREMENT BASED ON RADIO LINK PARAMETERS AND OBJECTIVE MEASUREMENT OF RECEIVED SPEECH SIGNALS
    6.
    发明专利
    SPEECH QUALITY MEASUREMENT BASED ON RADIO LINK PARAMETERS AND OBJECTIVE MEASUREMENT OF RECEIVED SPEECH SIGNALS 未知

    公开(公告)号：CA2295084C

    公开(公告)日：2007-05-15

    申请号：CA2295084

    申请日：1998-06-23

    Applicant: ERICSSON TELEFON AB L M

    Inventor： UVLIDEN ANDERS ,  KARLSSON ANDERS ,  MINDE TOR BJORN ,  HEIKKILA GUNNAR

    IPC: H04W24/00

    Abstract: An improved method and system of measuring the perceived speech quality in mobile telecommunications network are disclosed herein. In an embodiment of the invention, the method uses both radio link parameters and an objective measuring technique performed on received signals to estimate the speech quality perceived by the end-user. A radio link processing stage extracts temporal information from a set of available radio link parameters such as the BER, FER, RxLev, handover statistics, soft information, and speech energy. Concurrently, a speech processing stage is used to process a sequence of original signals and received signals, obtained from the output of a telecommunications system. The signal sequences are processed by an objective measuring technique such as Perceptual Speech Quality Measure (PSQM). The outputs from the radio link processing and speech processing stages are utilized to calculate an estimate for speech quality.

    Handling variable delay in objective speech quality assessment
    7.
    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.

    SPEECH QUALITY MEASUREMENT BASED ON RADIO LINK PARAMETERS AND OBJECTIVE MEASUREMENT OF RECEIVED SPEECH SIGNALS
    9.
    发明专利
    SPEECH QUALITY MEASUREMENT BASED ON RADIO LINK PARAMETERS AND OBJECTIVE MEASUREMENT OF RECEIVED SPEECH SIGNALS 未知

    公开(公告)号：CA2295084A1

    公开(公告)日：1998-12-30

    申请号：CA2295084

    申请日：1998-06-23

    Applicant: ERICSSON TELEFON AB L M

    Inventor： HEIKKILAE GUNNAR ,  MINDE TOR BJOERN ,  KARLSSON ANDERS ,  UVLIDEN ANDERS

    IPC: H04W24/00 ,  H04Q7/34

    Abstract: An improved method and system of measuring the perceived speech quality in mobile telecommunications network are disclosed herein. In an embodiment of the invention, the method uses both radio link parameters and an objective measuring technique performed on received signals to estimate the speech quality perceived by the end-user. A radio link processing stage extracts temporal information from a set of available radio link parameters such as the BER, FER, RxLev, handover statistics, soft information, and speech energy. Concurrently, a speech processing stage is used to process a sequence of original signals and received signals, obtained from the output of a telecommunications system. The signal sequences are processed by an objective measuring technique such as Perceptual Speech Quality Measure (PSQM). The outputs from the radio link processing and speech processing stages are utilized to calculate an estimate for speech quality. Furthermore, a weight may be given to radio link processing and speech processing in accordance with their performance under various conditions such that the overall speech quality is calculated with respect to the best approach.

    10.
    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.

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