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Circuit applied to display apparatus and associated signal processing method

a display apparatus and circuit technology, applied in electrical apparatus, digital transmission, orthogonal multiplex, etc., can solve the problems of inability to determine whether a received signal is impulsive interference, severe affecting image display, etc., to achieve accurate detection of impulsive interference, accurate determination of whether a received signal is, and long burst duration

Inactive Publication Date: 2018-10-18
XUESHAN TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0004]It is an object of the present invention to provide a circuit applied to a display apparatus and an associated signal processing method capable of accurately determining whether a received signal is affected by impulsive interference, and more particularly, capable of accurately detecting impulsive interference having extremely long burst durations, so as to solve the issues of the prior art.

Problems solved by technology

In the Digital Video Broadcasting—Second Generation Terrestrial (DVB-T2) standard, impulsive interference is regarded as an issue that severely affects image display.
However, for certain types of impulsive interference, the conventional detection method may result in misjudgment.
However, when the energy of such impulsive interference is weak, these test items may be overwhelmed by normal signals such that whether a received signal has impulsive interference cannot be determined simply through detecting the amplitude intensity of the received signal.

Method used

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  • Circuit applied to display apparatus and associated signal processing method
  • Circuit applied to display apparatus and associated signal processing method
  • Circuit applied to display apparatus and associated signal processing method

Examples

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Embodiment Construction

[0016]FIG. 1 shows a block diagram of a circuit 100 applied to a display apparatus according to an embodiment of the present invention. As shown in FIG. 1, the circuit 100 includes an analog front-end circuit 110, a cyclic prefix removing circuit 120, a time-domain / frequency-domain conversion circuit 130, a pilot capturing circuit 140, a data capturing circuit 142, an impulsive interference detection circuit 150, a microprocessor 160, a channel estimation circuit 170, an equalizer 180, a signal-to-noise ratio (SNR) estimation circuit 190, a de-interleaving circuit 192, a de-mapping circuit 194, a decoder 196 and a frame processing circuit 198. In this embodiment, the circuit 100 is a receiver, which disposed in a television or in a set-top box (STB) and is compliant with the Digital Television Broadcasting-Second Generation Terrestrial (DVB-T2) standard. After processing an analog input signal from an antenna, the circuit 100 generates an output signal to a back-end processing circu...

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PUM

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Abstract

A circuit applied to a display apparatus includes a front-end circuit, a conversion circuit and an impulsive interference detection circuit. The front-end circuit converts an analog input signal into a digital input signal. The conversion circuit, coupled to the front-end circuit, converts the digital input signal from a time domain to a frequency domain to generate a frequency-domain signal. The impulsive interference detection circuit, coupled to the conversion circuit, detects a noise intensity of the frequency-domain signal to generate a detection result, which is used to determine whether the analog input signal has impulsive interference.

Description

[0001]This application claims the benefit of Taiwan application Serial No. 106112126, filed Apr. 12, 2017, the subject matter of which is incorporated herein by reference.BACKGROUND OF THE INVENTIONField of the Invention[0002]The invention relates in general to signal processing in a display apparatus, and more particularly to an impulsive interference detection circuit applied to a display apparatus and an associated signal processing method.Description of the Related Art[0003]In the Digital Video Broadcasting—Second Generation Terrestrial (DVB-T2) standard, impulsive interference is regarded as an issue that severely affects image display. Impulsive interference has large sudden and periodical amplitudes, and is usually generated by factors in the ambient environment, e.g., an operating washing machine or dishwasher, and a fast automobile passing by. FIG. 1 shows a schematic diagram of impulsive interference. In FIG. 1, the impulsive interference includes multiple burst durations ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H04B1/10H04L27/26
CPCH04B1/1027H04L27/2649H04J11/0066H04L27/2647
Inventor YANG, TZU-YILAI, KO-YINTUNG, TAI-LAI
Owner XUESHAN TECH INC
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