公开(公告)号：DE60028380T2

公开(公告)日：2007-03-29

申请号：DE60028380

申请日：2000-06-29

Applicant: ERICSSON TELEFON AB L M

Inventor： SUNDQVIST JIM

IPC: H04L29/06 ,  H04L12/56 ,  H04L12/64 ,  H04L29/08

Abstract: A source encoder schedules its access to a network IP stack. During that scheduled period, the source encoder blocks the transport of non-real-time TCP and UDP packets. After at least one real-time packet has been transported through the stack, the source encoder allows the non-real-time packets to access the physical layer until the beginning of the next scheduled period. Consequently, the packet transport delay is reduced significantly, which results in a substantial increase in throughput.

公开(公告)号：DE69930929T2

公开(公告)日：2006-12-07

申请号：DE69930929

申请日：1999-04-28

Applicant: ERICSSON TELEFON AB L M

Inventor： EKUDDEN ERIK ,  SVENSSON TOMAS ,  SUNDQVIST JIM

IPC: G10L19/12 ,  H04L12/56 ,  G10L19/00 ,  H04L1/00 ,  H04L1/22 ,  H04L12/64

Abstract: A decoder improves delayed packet concealment in a packet network by using two decoder sections. A first decoder section bases its decoding during the concealment phase on erroneous filter states and a set of speech parameters, whereas a second decoder section bases its decoding on saved and updated filter states and the same speech parameters. The outputs of the two decoder sections are thereafter combined to form the final speech signal. This decoding strategy produces a speech signal with smooth transitions from delayed to non-delayed packets and uses information from the most recent packets for speech generation.

公开(公告)号：DE60027875D1

公开(公告)日：2006-06-14

申请号：DE60027875

申请日：2000-02-25

Applicant: ERICSSON TELEFON AB L M

Inventor： WESTBERG LARS ,  SVANBRO KRISTER ,  SUNDQVIST JIM

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

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：FI116434B

公开(公告)日：2005-11-15

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 ,  H04L12/20 ,  G10L15/24

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：SE522794C2

公开(公告)日：2004-03-09

申请号：SE0100633

申请日：2001-02-23

Applicant: ERICSSON TELEFON AB L M

Inventor： LENNESTAAL HAAKAN ,  SUNDQVIST JIM ,  ARNGREN TOMMY

IPC: H04L12/18 ,  H04L29/06 ,  H04L29/08 ,  H04L12/16 ,  H04Q11/04

公开(公告)号：CA2385616A1

公开(公告)日：2001-04-05

申请号：CA2385616

申请日：2000-08-11

Applicant: ERICSSON TELEFON AB L M

Inventor： AYADURAI VICKNESAN ,  SVANBRO KRISTER ,  JONSSON LARS-ERIK ,  HARASZTI ZSOLT ,  SUNDQVIST JIM

IPC: H04L29/06 ,  H04L12/56 ,  H04L12/801

Abstract: In packet communication paths (18) that include header compression, header fields of packets to be communicated are altered. The alteration of the head er fields (14) does not disturb their functionality, and its transparent to the header compression scheme of the packet communication path (18). The altered header fields (14) are provided for compression by the header compression scheme, resulting in improved performance of the header compression scheme. Performance improvements can also be achieved in packet communication paths (18) that do not use header compression, by violating the integrity of heade r fields in packets to be transmitted over the packet communication path (18).

公开(公告)号：AU6039500A

公开(公告)日：2001-01-30

申请号：AU6039500

申请日：2000-06-29

Applicant: ERICSSON TELEFON AB L M

Inventor： SUNDQVIST JIM

IPC: H04L12/56 ,  H04L12/64 ,  H04L29/06 ,  H04L29/08

Abstract: A source encoder schedules its access to a network IP stack. During that scheduled period, the source encoder blocks the transport of non-real-time TCP and UDP packets. After at least one real-time packet has been transported through the stack, the source encoder allows the non-real-time packets to access the physical layer until the beginning of the next scheduled period. Consequently, the packet transport delay is reduced significantly, which results in a substantial increase in throughput.

公开(公告)号：SE9902630L

公开(公告)日：2001-01-09

申请号：SE9902630

申请日：1999-07-08

Applicant: ERICSSON TELEFON AB L M

Inventor： NOHLGREN ANDERS ,  SUNDQVIST JIM

IPC: H04L29/08 ,  H04B14/04 ,  H04J3/06 ,  H04L7/00 ,  H04L12/64 ,  H04Q11/04

Abstract: The invention is concerned with a method and an apparatus, wherein information data is sent between at least two transceivers in a telecommunication system. The information data is transmitted from the sender of a transceiver to the receiver of one or more other transceivers in form of digital signals having a given sampling frequency. The signals are played out by the receiver in a controlled way. The invention is mainly characterized by estimation of the sender's sampling rate at the sending side of a transceiver, transmitting the estimation to the receiving side of an another transceiver, and controlling the playout of the information data at the receiving side by means of the sampling rate estimated at the sending side to avoid delays and/or interrupts in the presentation. The invention is especially suitable in connection with packet based networks wherein the information data is sent between the transceivers in the telecommunication system in form of packet data frames, such as audio frames.

公开(公告)号：SE0004838D0

公开(公告)日：2000-12-22

申请号：SE0004838

申请日：2000-12-22

Applicant: ERICSSON TELEFON AB L M

Inventor： SUNDQVIST JIM ,  JANSSON FREDRIK

IPC: G10L19/24 ,  H04L

Abstract: A method for generating speech packets and a communication apparatus implementing the method and functioning as a first node of a communication system. A first stream of digital speech samples having a first sample rate is provided ( 201 ). If the first sample rate is determined ( 202 ) as not matching a required sample rate, said speech packets are generated ( 204 ) based on a second stream of digital speech samples generated ( 203 ) by performing sample rate conversion of the first stream of digital speech samples.

公开(公告)号：CA2363591A1

公开(公告)日：2000-08-31

申请号：CA2363591

申请日：2000-02-25

Applicant: ERICSSON TELEFON AB L M

Inventor： SUNDQVIST JIM ,  WESTBERG LARS ,  SVANBRO KRISTER

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 th e communication signal to carry the header update information (73). If the communication signal includes source encoded data, the header compression so ft state can be updated selectively (126) based on the bit rate (122, 124) of a codec that produced the source encoded data.