公开(公告)号：AU3578800A

公开(公告)日：2000-09-14

申请号：AU3578800

申请日：2000-02-25

Applicant: ERICSSON TELEFON AB L M

Inventor： WESTBERG LARS ,  SVANBRO KRISTER ,  SUNDQVIST JIM

IPC: H04L1/00 ,  H04L12/56 ,  H04L29/06

Abstract: The soft state of a header compression scheme in a communication system carrying packet traffic including a real time communication signal can be updated (63) during periods of communication signal inactivity (62), during which there is no need to transmit the communication signal. The header compression soft state can also be updated by stealing bits (83, 84) from the communication signal to carry the header update information (73). If the communication signal includes source encoded data, the header compression soft state can be updated selectively (126) based on the bit rate (122, 124) of a codec that produced the source encoded data.

公开(公告)号：AU2132100A

公开(公告)日：2000-07-31

申请号：AU2132100

申请日：1999-12-07

Applicant: ERICSSON TELEFON AB L M

Inventor： SORQVIST PATRIK ,  SVENSSON TOMAS ,  SUNDQVIST JIM ,  ERIKSSON ANDERS

IPC: H04M1/60 ,  H04M1/00 ,  H04M9/08

Abstract: Adaptive gain control techniques provide correctly adjusted audio signal levels during the entirety of an Internet telephony conversation and are resilient to background noise and loudspeaker echo. Disclosed techniques can account for multiple near-end speakers, as well as changes in near-end environment. In an exemplary embodiment, an adaptive gain controller includes a gain control processor configured to adjust an analog gain for a microphone output signal based on measurements of the microphone output signal and on measurements of a loudspeaker input signal.

公开(公告)号：CA2356620A1

公开(公告)日：2000-07-06

申请号：CA2356620

申请日：1999-12-07

Applicant: ERICSSON TELEFON AB L M

Inventor： SVENSSON TOMAS ,  SORQVIST PATRIK ,  SUNDQVIST JIM ,  ERIKSSON ANDERS

IPC: H04M1/60 ,  H04M1/00 ,  H04M9/08

Abstract: Adaptive gain control techniques provide correctly adjusted audio signal levels during the entirety of an Internet telephony conversation and are resilient to background noise and loudspeaker echo. Disclosed techniques can account for multiple near-end speakers, as well as changes in near-end environment. In an exemplary embodiment, an adaptive gain controller include s a gain control processor configured to adjust an analog gain for a microphon e output signal based on measurements of the microphone output signal and on measurements of a loudspeaker input signal.

公开(公告)号：SE0002016D0

公开(公告)日：2000-05-31

申请号：SE0002016

申请日：2000-05-31

Applicant: ERICSSON TELEFON AB L M

Inventor： SUNDQVIST JIM ,  LENNESTAAL HAAKAN ,  NOHLGREN ANDERS ,  LINDQVIST MORGAN ,  WANG WEI

IPC: H04L12/64 ,  G10L

Abstract: The present invention relates to a receiver system in a communication system supporting packet-based communicatior (e.g., an IP-network), including a receiver, speech decoder ( 40 ) and a jitter buffer ( 20 ) for handling delay variations in the reception of a speech signal consisting of packets containing frames with encoded speech. A jitter buffer controller ( 50 ) is provided for keeping information about the functional size of the jitter buffer ( 20 ) and for providing the speech decoder ( 40 ) with control information, such that the speech decoder ( 40 ), based on that information. provides a dynamic adaptation of the size of the jitter buffer ( 20 ) using the received encoded, packetized speech signal. The invention also relates to a method of adapting the functional size of the jitter buffer of a receiver system.

公开(公告)号：DE19781715T1

公开(公告)日：1999-04-29

申请号：DE19781715

申请日：1997-04-11

Applicant: ERICSSON TELEFON AB L M

Inventor： EKUDDEN ERIK ,  MINDE TOR BJOERN ,  HELLWIG KARL ,  SUNDQVIST JIM

IPC: H04B7/005 ,  H04L1/00 ,  H04L1/20 ,  G10L9/18

Abstract: In a digital cellular radio communication system, a base station selects a speech/channel encoding mode based on measurements of the local radio environment. The mobile station determines the selected mode by trial decoding possible modes to find the most probable mode and uses the same mode for transmission to the base station on the return link. The coding gain/loss obtained by this mode switching may be used to adjust the output power of transmitters, thereby reducing the overall interference level in the system.

公开(公告)号：FI982316A0

公开(公告)日：1998-10-26

申请号：FI982316

申请日：1998-10-26

Applicant: ERICSSON TELEFON AB L M

Inventor： EKUDDEN ERIK ,  MINDE TOR BJOERN ,  HELLWIG KARL ,  SUNDQVIST JIM

IPC: H04B7/005 ,  H04L1/00 ,  H04L

Abstract: In a digital cellular radio communication system, a base station selects a speech/channel encoding mode based on measurements of the local radio environment. The mobile station determines the selected mode by trial decoding possible modes to find the most probable mode and uses the same mode for transmission to the base station on the return link. The coding gain/loss obtained by this mode switching may be used to adjust the output power of transmitters, thereby reducing the overall interference level in the system.

公开(公告)号：FI982316A

公开(公告)日：1998-10-26

申请号：FI982316

申请日：1998-10-26

Applicant: ERICSSON TELEFON AB L M

Inventor： EKUDDEN ERIK ,  MINDE TOR BJOERN ,  HELLWIG KARL ,  SUNDQVIST JIM

IPC: H04B7/005 ,  H04L1/00 ,  H04L

Abstract: In a digital cellular radio communication system, a base station selects a speech/channel encoding mode based on measurements of the local radio environment. The mobile station determines the selected mode by trial decoding possible modes to find the most probable mode and uses the same mode for transmission to the base station on the return link. The coding gain/loss obtained by this mode switching may be used to adjust the output power of transmitters, thereby reducing the overall interference level in the system.