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Method and circuit device for reducing reception interferences, for receiving radio broadcasting signal

A technology for radio broadcasting and receiving interference, especially in the field of multipath and receiving interference in the input signal, it can solve the problem of unbalanced sound image, and achieve the effect of improving gain and resisting imbalance.

Inactive Publication Date: 2004-07-28
VOLKSWAGEN AG
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Problems solved by technology

[0003] This known method has the disadvantage that when the high-frequency content of the audio signal produced by the audio unit is reduced as required, the sound image will be changed unfavorably (the sound image is "unbalanced"), whereby make the soundgram unbalanced

Method used

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  • Method and circuit device for reducing reception interferences, for receiving radio broadcasting signal
  • Method and circuit device for reducing reception interferences, for receiving radio broadcasting signal
  • Method and circuit device for reducing reception interferences, for receiving radio broadcasting signal

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Embodiment Construction

[0016] 1 shows an embodiment of a circuit arrangement generally designated 1 for carrying out a method for selecting and reducing reception interference, in particular multipath reception interference, of audio signals, which circuit arrangement is essentially divided into It is a detection unit 10, a processing unit 20 and an audio unit 30, wherein the detection signal generated by the detection unit 10 is input to the processing unit 20, and the audio unit 30 is received from the frequency modulator 31 An audio signal is produced in the demodulated radio broadcast signal, and this audio signal is input to the audio amplifier 40, and the output signal of the audio amplifier 40 is then input to the mode and method of FIG. in the speaker shown. The detection unit 10 has a multipath reception interference detector 11 with which multipath reception interferences can be detected in a known manner and which will likewise not be described in detail, and a control signal MWS which ch...

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Abstract

The invention relates to a method for detecting and reducing reception interferences, especially multiway reception interferences, in an input signal (E) of a radio receiver. According to said method, a reception interference of this type is detected in a detector device (10) and a corresponding detector signal (MWS, AMS, MKS) is transmitted to a processing device (20) which then evaluates this detector signal (MWS, AMS, MKS). A corresponding control signal (S) is then generated by the processing device (20) and transmitted to an audio unit (30), which generates an audio signal lying in a frequency interval delimited by a lower limit frequency (GO") and an upper limit frequency (GO'). The audio unit (30) lowers the level of the audio signal (A) generated by the same using the input signal (E) within the frequency range above a lowered upper limit frequency (G1', G2') below the aforementioned upper limit frequency (GO') of the audio signal (A). According to the invention, the level of the audio signal (A) is lowered in the range below a lower limit frequency that has been raised above the aforementioned lower limit frequency (GO") at the same time as the level of the audio signal (A) is lowered in the frequency range above the lowered upper limit frequency (G1', G2').

Description

technical field [0001] The invention relates to a method for identifying and reducing reception disturbances, in particular multipath reception disturbances, in the input signal of a radio broadcasting receiver, wherein the occurrence of such reception disturbances is detected in a detection unit and the corresponding detected The signal is input to a processing unit that analyzes the detection signal, and a corresponding control signal is generated by the processing unit at the same time, and sent to an audio unit that can generate an audio signal, and the audio signal is located in a Within the frequency interval defined by the lower limit frequency and the upper limit frequency, and wherein, for a lowered upper limit frequency located below the upper limit frequency of the audio signal, the frequency range above it is reduced by the audio unit The level of the audio signal generated by the audio unit from the input signal within. Background technique [0002] A method of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03G3/32H04B1/00H04B1/12H04B1/16H04B17/00
CPCH03G3/32H04B17/00H04B1/16H04B1/00H04B1/12H03G9/30H03G2201/206H03G2201/204
Inventor D·拜尔
Owner VOLKSWAGEN AG
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