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    RUNDFUNKEMPFÄNGER MIT DIGITALER SIGNALVERARBEITUNG
    1.
    发明授权
    RUNDFUNKEMPFÄNGER MIT DIGITALER SIGNALVERARBEITUNG 失效

    公开(公告)号：EP0642715B1

    公开(公告)日：2001-10-04

    申请号：EP94911066.2

    申请日：1994-03-22

    申请人： Blaupunkt-Werke GmbH

    发明人： CHAHABADI, Djahanyar ,  HERRMANN, Matthias ,  VOGT, Lothar

    IPC分类号： H04B1/16 ,  H04B1/10

    CPC分类号： H04B1/1661 ,  H04B1/1027

    摘要： In a radio receiver with digital signal processing, a received stereo multiplex signal and digitalized useful signals derived therefrom are processed at a first scanning rate. Auxiliary signals at least partially derived from the stereo multiplex signal are processed at a second scanning rate lower than the first scanning rate. The scanning rate of the processed auxiliary signals is increased up to the first scanning speed, and the processed auxiliary signals act as control signals at the first scanning rate on the stereo multiplex signal and useful signals.

    VERFAHREN ZUR ABLEITUNG EINES VON DER QUALITÄT EINES EMPFANGENEN MULTIPLEXSIGNALS ABHÄNGIGEN QUALITÄTSSIGNALS
    7.
    发明授权
    VERFAHREN ZUR ABLEITUNG EINES VON DER QUALITÄT EINES EMPFANGENEN MULTIPLEXSIGNALS ABHÄNGIGEN QUALITÄTSSIGNALS 失效
    FOR A质量的一个导程序接收到的信号多路信号质量依赖

    公开(公告)号：EP0691049B1

    公开(公告)日：1997-06-11

    申请号：EP94911061.3

    申请日：1994-03-22

    申请人： Blaupunkt-Werke GmbH

    发明人： CHAHABADI, Djahanyar ,  HERMANN, Matthias ,  VOGT, Lothar ,  Kässer, Jürgen

    IPC分类号： H04B1/16 ,  H04B1/30

    CPC分类号： H04H20/12 ,  H04H40/45

    摘要： In a circuit for deriving a quality signal dependent on the quality of a received multiplex signal in a stereo radio receiver. The multiplex signal contains a sum signal (L+R) in the base band, an auxiliary carrier modulated with a difference signal (L-R) and a pilot signal at half the frequency of the auxiliary carrier, the multiplex signal in digital form is multiplied by a reference carrier obtained from a scanning pulse generated in the radio receiver in two phase positions mutually offset by 90°. The mixed signals obtained by the multiplication are multiplied by a correction signal to form corrected mixed signals which are added and taken together with the sum signal to a matrix circuit to form stereo audio signals (L, R). The mixed signals are also multiplied by the other correction signal. The products of these multiplications are subtracted from each other and low-pass-filtered.