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    A method and apparatus for providing a camera accessory with compression
    71.
    发明专利
    A method and apparatus for providing a camera accessory with compression 未知

    公开(公告)号：AU1025701A

    公开(公告)日：2001-04-30

    申请号：AU1025701

    申请日：2000-10-16

    Applicant: ERICSSON TELEFON AB L M

    Inventor： CARLSSON TORSTEN ,  GUSTAFSSON KJELL ,  HOLLSTROM MAGNUS ,  LINGE ANDERS ,  TILLGREN MAGNUS ,  BENGTSSON HENRIK ,  MEDVED IVAN ,  WERGELAND SOFIE ,  LENNARTSSON OLA

    IPC: H04N5/225 ,  H04M1/00 ,  H04N7/14 ,  H04N7/50 ,  H04N7/26

    Abstract: A method and apparatus is described for providing a camera accessory to a wireless mobile terminal in a wireless radiocommunication system. The wireless mobile terminal has an image data interface and a physical interface for detachably coupling the camera accessory thereto. One or more frames of image data is captured in the camera accessory and compressed according to one or more compression formats. The captured and compressed frames are transferred to the wireless mobile terminal over the image data interface. The camera accessory does not include a display. Image data is captured in a predetermined format including a CIF format. Still image frames are compressed using a JPEG format and an image stream is compressed using an MPEG format. The captured and compressed frames are transferred to the wireless mobile terminal over the image data interface using respective predetermined formats including RGB CIF, YUV CIF, JPEG, MPEG, and MPEG-4 with CIF to QCIF conversion format. The image data interface includes a wired interface and wherein the camera accessory derives a power supply from the wireless mobile terminal or includes a wireless interface.

    APPARATUS IN A COMMUNICATION SYSTEM
    73.
    发明专利
    APPARATUS IN A COMMUNICATION SYSTEM 未知

    公开(公告)号：HK1025692A1

    公开(公告)日：2000-11-17

    申请号：HK00104727

    申请日：2000-07-27

    Applicant: ERICSSON TELEFON AB L M

    Inventor： MANNERSTRALE JACOB ,  ISBERG MARTIN ,  LINDQUIST BJORN ,  CARLSSON TORSTEN ,  HAGBERG HANS ,  JAKOBSSON PETER ,  KUNKEL LARS PETER ,  GUSTAFSSON KJELL

    IPC: H03D3/00 ,  H04B1/40 ,  H04B1/26 ,  H04B ,  H03D

    Abstract: The present invention relates to a receiver device comprising a receiver (104) adapted to receive radio signals in two frequency bands (FB1, FB2). The radio signals in one of the frequency bands (FB1) constitute communication signals for a radio system (AMPS, NMT) having a certain channel spacing, whereas the radio signals of the second frequency band (FB2) constitutes communication signals for a second radio system (PCS1900, DCS1800, GSM) having a second certain channel spacing. The receiver (104) comprises two inputs (108, 11) each intended for a radio system having different frequency bands and channel spacing. For radio signals occurring on one input (108), mixing is performed from the RF range directly to the baseband frequency range. For radio signals occurring on the second input (108) the mixing from the radio frequency range to the baseband frequency range is carried out through an intermediate frequency range. Further the receiver (104) comprises an output (112) intended to deliver baseband signals for both radio systems. The output (112) is connected to a baseband unit which is common to the radio systems. In the baseband unit, among other things, lowpass filtering, detection and neighbouring channel suppression are performed on the received radio signal that has been mixed down to the baseband frequency range.

    Demodulating received signals
    78.
    发明专利
    Demodulating received signals 未知

    公开(公告)号：GB2323502A

    公开(公告)日：1998-09-23

    申请号：GB9705581

    申请日：1997-03-18

    Applicant: ERICSSON TELEFON AB L M

    Inventor： GUSTAFSSON KJELL ,  ATARIUS ROOZBEH

    IPC: H03D3/00 ,  H03D7/16 ,  H04L25/06 ,  H04L27/22

    Abstract: A receiver circuit allows extracting information from baseband in phase and quadrature components of a received signal. Means are disclosed for removing (subtracting) constant disturbance (error) components I o , Q o from the baseband signal components, whilst retaining constant components in the signal. Application is in communications based on the AMPS mobile telephony standard.

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