Circuit applied to display device and related signal processing method
A display device and a signal processing technology, applied in the field of signal processing, can solve the problems of not being able to correctly determine signal pulse interference, misjudging it as pulse interference, etc.
Inactive Publication Date: 2019-04-02
MEDIATEK INC
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Problems solved by technology
In the prior art, it is judged whether there is pulsed interference by detecting whether the noise intensity in the signal is higher than a fixed threshold value, but the judgment of such pulsed interference may cause misjudgment
For example, when the threshold is set high and the energy of the impulsive interference in the signal is weak, the impulsive interference may be regarded as part of the general noise because it is lower than the threshold, and then As a result, it is impossible to correctly determine whether the signal has pulsed interference; on the other hand, if the threshold is set low, it is possible to misjudge general noise as pulsed interference
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[0041] As mentioned in the prior art, using a fixed threshold to judge the pulsed interference is likely to cause misjudgment. Therefore, the present invention proposes a method for dynamically determining the threshold to solve the problems in the prior art. In one embodiment, since the noise of the signal includes general noise (for example, Additive white Gaussian noise (AWGN)) and impulsive interference, this embodiment first determines the strength of the normal noise, and then The strength of the normal noise is then multiplied by a scaling parameter (for example, 2) to generate a threshold, which is then used to determine whether the signal has impulsive interference (for example, noise above this threshold indicates impulsive interference). However, when the signal has impulsive interference and the intensity of the impulsive interference is weak, the intensity of general noise is likely to overwhelm the impulsive interference. In this case, the determined threshold ma...
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The invention discloses a receiver circuit applied to a display device and a related signal processing method. A noise detection circuit and a critical value determination circuit are included. The noise detection circuit is used for carrying out noise detection on a received signal to generate multiple noise intensity values respectively; the critical value determination circuit is used for determining a critical value according to the multiple noise intensity values for judging whether the received signal has impulse interference; the critical value determination circuit comprises a sequencing circuit and a selection circuit; the sequencing circuit is used for sequencing the multiple noise intensity values; the selection circuit is used for selecting the Mth noise intensity value in sequence in the multiple noise intensity values as a specific noise intensity value; and the critical value determination circuit determines the critical value according to the specific noise intensity value.
Description
technical field [0001] The present invention relates to signal processing inside a display device, in particular to a circuit for pulse interference detection and a related signal processing method applied to a display device. Background technique [0002] In the second-generation digital mobile TV standard (DVB-T2), impulsive interference (impulsive interference) is regarded as a problem that seriously affects image display. Impulsive interference has sudden and periodic strong amplitudes, and It is usually generated by the surrounding environment, such as running washing machines, dishwashers, and whizzing cars...etc. If the impulsive interference can be effectively detected, there is an opportunity to control the signal processing method of the subsequent circuit to reduce the impact of the impulsive interference. In the prior art, it is judged whether there is pulsed interference by detecting whether the noise intensity in the signal is higher than a fixed threshold, bu...
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Login to View More IPC IPC(8): H04N5/14H04N5/44H04N17/00
CPCH04N5/14H04N5/44H04N17/004
Inventor 杨子颐赖科印童泰来
Owner MEDIATEK INC