公开(公告)号：US5661809A

公开(公告)日：1997-08-26

申请号：US343413

申请日：1995-02-14

Applicant: Djahanyar Chahabadi ,  Matthias Herrmann ,  Lothar Vogt ,  Juergen Kaesser

Inventor： Djahanyar Chahabadi ,  Matthias Herrmann ,  Lothar Vogt ,  Juergen Kaesser

IPC: H03H17/04 ,  H03H17/02 ,  H04B1/10 ,  H04B1/16 ,  H04B1/26 ,  H04B1/30 ,  H04B1/64 ,  H04H20/88 ,  H04H5/00

CPC classification number: H04B1/1661 ,  H04B1/1027

Abstract: A radio receiver is provided having digital signal processing, a first and a second auxiliary signal derived from a received stereo multiplex signal, the first auxiliary signal being dependent upon the existence of signal components, whose frequency lies above the fundamental frequency range of the stereo multiplex signal, and the second auxiliary signal being dependent upon the symmetry of the sidebands of the stereo subcarrier. The first and the second auxiliary signal are combined to form an interference signal indicating the existence of interference. At least one control signal is derived from the interference signal to influence the audio signals acquired by decoding the stereo multiplex signal.

Abstract translation: PCT No.PCT / DE94 / 00324 Sec。 371日期：1995年2月14日 102（e）日期1995年2月14日PCT 1994年3月22日PCT公布。 公开号WO94 / 22231 日期1994年9月29日提供具有数字信号处理的无线电接收机，从接收的立体声多路复用信号导出的第一和第二辅助信号，第一辅助信号取决于信号分量的存在，其频率高于基频 立体声多路复用信号的范围，第二辅助信号取决于立体声副载波的边带的对称性。 第一和第二辅助信号被组合以形成指示干扰的存在的干扰信号。 从干扰信号导出至少一个控制信号，以影响通过解码立体声多路复用信号而获得的音频信号。

公开(公告)号：US5535280A

公开(公告)日：1996-07-09

申请号：US288554

申请日：1994-08-10

Applicant: Djahanyar Chahabadi ,  Lothar Vogt

Inventor： Djahanyar Chahabadi ,  Lothar Vogt

IPC: H04B1/10 ,  H03G3/34 ,  H04H5/00

CPC classification number: H03G3/345

Abstract: In a digital circuit which removes ignition noise from a multiplex signal in a radio receiver, especially in a car radio, the multiplex signal is supplied via a high-pass filter (3) and a squaring or absolute value determing circuit (4) as a digital signal with a sampling frequency that is a multiple of the frequency of the pilot tone. The high-pass filtered and squared or absolute value multiplex signal is compared to a short-time mean value of the high-pass filtered and squared (in absolute value) multiplex signal. A control signal S of predetermined duration is formed when deviations occur that are greater than a preset standard. The control signal S controls a correcting circuit in such a manner that sampling values of the multiplex signal occurring during the control signal are replaced with sampling values occurring during the previous period of the pilot tone, thereby masking the ignition noise.

Abstract translation: 在数字电路中，特别是在无线电接收机中，从多路复用信号中消除点火噪声，多路复用信号通过高通滤波器（3）和平方或绝对值确定电路（4）作为 数字信号的采样频率是导频音频率的倍数。 将高通滤波和平方或绝对值复用信号与高通滤波和平方（绝对值）复用信号的短时平均值进行比较。 当出现大于预设标准的偏差时，形成预定持续时间的控制信号S. 控制信号S以这样的方式控制校正电路，使得在控制信号期间发生的多路复用信号的采样值被替换为在导频音的前一周期期间发生的采样值，从而掩蔽点火噪声。

公开(公告)号：US5491755A

公开(公告)日：1996-02-13

申请号：US183029

申请日：1994-01-18

Applicant: Lothar Vogt ,  Matthias Herrmann

Inventor： Lothar Vogt ,  Matthias Herrmann

IPC: H03G3/02 ,  H03G5/00 ,  H03G9/00 ,  H03H17/00 ,  H03H17/02 ,  H04B1/00

CPC classification number: H03G5/005

Abstract: In a circuit for digital processing of audio signals in a radio receiver, preferably in a car radio, the audio signals pass through a digital filter designed as a tone control, whose frequency response can be controlled with supplied coefficients, and a volume control, whose transmission factor can be controlled with supplied control signals. If the high and/or low frequencies are raised, the transmission factor of the filter at medium frequencies can be correspondingly lowered. Volume control compensates for the reduction. The volume control may contain a digital and an analog portion.

Abstract translation: 在无线电接收机，优选在汽车无线电中的音频信号的数字处理电路中，音频信号通过设计成音调控制的数字滤波器，其频率响应可以用所提供的系数来控制，音量控制器 传输系数可以通过提供的控制信号进行控制。 如果提高高频和/或低频，则可以相应地降低中频滤波器的传输系数。 音量控制补偿减少。 音量控制可以包含数字和模拟部分。