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    8.
    发明专利
    未知

    公开(公告)号：EE04510B1

    公开(公告)日：2005-06-15

    申请号：EEP9900423

    申请日：1998-03-16

    Applicant: TELIA AB

    Inventor： THOLIN PER ,  BAHLENBERG GUNNAR ,  DILLNER ERIK ,  JOHANSSON MAGNUS ,  LJUNGGREN LIS-MARI ,  TONVALL HARRY ,  WESTER PER-OLA

    IPC: H04L12/70 ,  H04N5/00 ,  H04N7/24 ,  H04N7/52 ,  H04Q11/04 ,  H04L12/56 ,  H04N7/62

    Abstract: The invention provides a MPEG-2 broadband multimedia terminal for audiovisual communication, or distribution, including a MPEG-2 encoder, a MPEG-2 decoder, a workstation for the presentation of audio, visual and data signals generated by the MPEG-2 decoder, and a control unit for overall management and control of said terminal. The MPEG-2 encoder and decoder have architectures for implementation of ATM-adapted system layer multiplexing and demultiplexing, respectively. The encoder includes a multiplexing unit for packeting and multiplexing audio and video signals in accordance with MPEG-2 and for generating a MPEG-2 transport stream for application to an ATM Adaption Layer (AAL). The multiplexing unit is adapted to divide each MPEG-2 data packet, in the MPEG-2 transport stream, into a number of separate data packets for application to the AAL and to add a status byte to each of the data packets prior to application to the AAL. The MPEG-2 decoder, wherein MPEG-2 system layer decoding includes demultiplexing of the different elementary streams contained within the system layer, and wherein AAL SAR-PDU payload units, extracted from ATM cells, are converted into MPEG-2 data packets, is adapted to convert the AAL SAR-PDU payload units into MPEG-2 data packets, on a cell basis, as part of the MPEG-2 demultiplexing. The AAL SAR-PDU payload units may each include a status byte which indicates, by means of a VCI, the channel over which an associated cell has been transmitted. The status byte may also indicates if an associated data block contains a MPEG-2 packet header.

    10.
    发明专利
    未知

    公开(公告)号：SE9700981L

    公开(公告)日：1998-09-19

    申请号：SE9700981

    申请日：1997-03-18

    Applicant: TELIA AB

    Inventor： THOLIN PER ,  BAHLENBERG GUNNAR ,  DILLNER ERIK ,  JOHANSSON MAGNUS ,  LJUNGGREN LIS-MARIE ,  TONWALL HARRY ,  WESTER PER-OLA

    IPC: H04L12/70 ,  H04N5/00 ,  H04N7/24 ,  H04N7/52 ,  H04Q11/04 ,  H04N7/62 ,  H04L12/56

    Abstract: The invention provides a MPEG-2 broadband multimedia terminal for audiovisual communication, or distribution, including a MPEG-2 encoder, a MPEG-2 decoder, a workstation for the presentation of audio, visual and data signals generated by the MPEG-2 decoder, and a control unit for overall management and control of said terminal. The MPEG-2 encoder and decoder have architectures for implementation of ATM-adapted system layer multiplexing and demultiplexing, respectively. The encoder includes a multiplexing unit for packeting and multiplexing audio and video signals in accordance with MPEG-2 and for generating a MPEG-2 transport stream for application to an ATM Adaption Layer (AAL). The multiplexing unit is adapted to divide each MPEG-2 data packet, in the MPEG-2 transport stream, into a number of separate data packets for application to the AAL and to add a status byte to each of the data packets prior to application to the AAL. The MPEG-2 decoder, wherein MPEG-2 system layer decoding includes demultiplexing of the different elementary streams contained within the system layer, and wherein AAL SAR-PDU payload units, extracted from ATM cells, are converted into MPEG-2 data packets, is adapted to convert the AAL SAR-PDU payload units into MPEG-2 data packets, on a cell basis, as part of the MPEG-2 demultiplexing. The AAL SAR-PDU payload units may each include a status byte which indicates, by means of a VCI, the channel over which an associated cell has been transmitted. The status byte may also indicates if an associated data block contains a MPEG-2 packet header.

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