KR100397477B1 - Television with sound interference cancellation - Google Patents

Abstract

The present invention relates to a television having a sound interference canceling function, comprising: a memory for storing a reference voice signal output from the P / S separation unit, and a P / S separation signal and a time delay audio signal stored in the memory. A comparison unit that compares the delayed memory that is received from the storage unit with the data outputted from the memory and the delayed memory, and whether or not a voice signal having the same component exists. A delay detector which detects a time difference between the same signals in the presence of a voice signal of the same component in the delay memory, and the same voice that is output later by the time difference detected after outputting a reference signal based on the time difference detected by the delay detector Voice control unit for outputting a control signal for removing sound interference, which is a signal, to this voice processing unit And including, a sound to be received has the effect of storage in the memory and the delay memory and compared to the output to determine if there is a delay in the audio component and removes it if there is a delay component of the interference sound stored data.

Description

Television with sound interference removing function

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television having a sound interference canceling function. In particular, the present invention relates to storing a received voice in a memory and a delay memory and comparing the stored data to determine whether there is a delay component in the speech, and when there is sound interference as a delay component. The present invention relates to a television having a sound interference cancellation function for removing and outputting the same.

In general, a television receives and demodulates a broadcast signal transmitted from a broadcasting station and outputs it as a video signal and an audio signal through a CRT and a speaker. A typical television that performs this function is a microcomputer for managing the overall operation of the system, an intermediate frequency processing module for processing video and audio intermediate frequencies (VIF and SIF), and a signal for restoring the received video signal to the original video signal. A video demodulation module and a deflection module for deflecting an image signal are included as components, and each module is separately configured to receive and process broadcast signals.

As shown in FIG. 1, the television as described above includes a key input unit 10, a microcomputer 20, a tuner unit 30, an IF detector 40, a P / S separation unit 50, and an image processing unit. 60, an image amplifier 70, an audio processor 80, and an audio amplifier 90.

The key input unit 10 outputs signals corresponding to various operation modes of the television selected by the user, for example, channel selection and sound output. The microcomputer 20 outputs the tuning voltage corresponding to the signal output from the key input unit 10 to the tuner unit 30 to be described later, and outputs the selected voltage to each part of the television according to the signal output from the key input unit 10. The control signal is output to ensure proper operation.

The tuner 30 tunes and outputs a frequency band corresponding to a control signal input from a broadcast signal input through an antenna. The IF detector 40 detects and outputs an intermediate frequency from the broadcast signal output from the tuner 30. The P / S separator 50 separates and outputs an image signal and an audio signal from the signal output from the IF detector 40.

The image processor 60 converts the image signal output from the P / S separation unit 30 into a signal that can be displayed through a predetermined process and outputs the converted signal. The image amplifier 70 amplifies the image signal output from the image processor 60 and outputs it to the monitor.

The voice processing unit 80 processes the voice signal output from the P / S separation unit 50 according to a predetermined processing process, and converts the voice signal into a signal that can be output through the speaker. The voice amplifier 90 amplifies the voice signal output from the voice processor 80 and outputs it to the speaker.

In the television configured as described above, the image output on the screen through the monitor can be adjusted such as tint, bright, color, and the like. When the user selects a desired screen state through the key input unit 10, the microcomputer 20 outputs a control signal corresponding to the signal output from the key input unit 10 to the image processor 60 to match the user's preference. Allows the image to be output to the monitor.

In addition, the user may select the strength and output method of the voice output through the speaker through the key input unit 10. The microcomputer 20 outputs an operation control signal to the voice processing unit 80 based on the signal output from the key input unit 10, and the intensity and output method of the voice output selected by the user, for example, a mono system or a stereo. The voice controlled according to the method, the surround method, and the like is output.

However, when two or more propagation paths from a transmitting antenna to a receiving antenna exist due to the reflection of radio waves from a building, a transmission line, or the like, ghosting occurs due to overlapping of the image output according to the secondary radio wave after the image output due to the primary radio wave. Similarly, in voice, there is a problem in that the same voice of the second wave following the first wave is output in the form of sound interference so that clean sound quality cannot be obtained.

Accordingly, an object of the present invention for solving the problems of the prior art as described above is to store the received voice in the memory and the delay memory and compare the stored data to determine whether the voice has a delay component, and the sound interference as a delay component The present invention provides a television having a sound interference canceling function that removes and outputs a clear sound quality, if any.

1 is a block diagram schematically showing a configuration of a general television;

Fig. 2 is a block diagram showing the configuration of a television with sound interference cancellation in accordance with a preferred embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

10, 10A: key input 20, 20A: microcomputer

30, 30A: Tuner part 40, 40A: IF detector part

50, 50A: P / S separation unit 60, 60A: image processing unit

70, 70A: video amplifier 80, 80A: audio processor

90, 90A: voice amplifier 100: memory

110: delay memory 120: comparison unit

130: delay detection unit 140: voice control unit

Television having a sound interference cancellation function of the present invention for achieving the above object, P / S separation unit for separating and outputting the video signal and the audio signal from the received broadcast signal and the audio output from the P / S separation unit A television comprising a voice processing unit for processing a signal to be output by a speaker, comprising: a memory for storing a reference voice signal output from the P / S separation unit, and a voice signal having a time delay and a signal stored in the memory. A comparison unit for comparing the delay memory received from the P / S separation unit and the data output from the memory and the delay memory and whether a voice signal having the same component exists; and a comparison result output from the comparison unit When the audio signal of the same component exists in the memory and the delay memory according to A delay detection unit for detecting a difference and a control signal for outputting a reference signal based on the time difference detected by the delay detection unit, and then outputting a control signal to the voice processing unit to remove sound interference, which is the same voice signal which is output later by the detected time difference. It includes a voice control unit.

The above objects and various advantages of the present invention will become more apparent from the preferred embodiments of the invention described below with reference to the accompanying drawings by those skilled in the art.

Hereinafter, a preferred embodiment according to the present invention will be described with reference to the accompanying drawings.

2 shows a television according to a preferred embodiment of the present invention, a key input unit 10A, a microcomputer 20A, a tuner unit 30A, an IF detector 40A, a P / S separation unit 50A, and an image processing unit 60A. ), An image amplifier 70A, an audio processor 80A, an audio amplifier 90A, a memory 100, a delay memory 110, a comparator 120, a delay detector 130, and an audio controller 140 It includes.

As described in the related art, the key input unit 10A outputs signals corresponding to various operation modes of the television selected by the user, and the microcomputer 20A outputs signals for controlling the overall operation of the television according to the user's request. do.

The tuner unit 30A tunes and outputs a frequency band corresponding to a control signal input from a broadcast signal input through an antenna, and the IF detector 40A detects an intermediate frequency in the broadcast signal output from the tuner unit. The P / S separator 50A separates the video signal and the audio signal from the signal output from the IF detector.

The voice processing unit 80A processes and outputs a voice signal output from the P / S separation unit according to a predetermined processing process, and the voice amplifier 90A adjusts the voice signal output from the voice processing unit according to a user's preference. Amplify and output to the speaker.

On the other hand, the memory 100 stores the voice signal output from the P / S separation unit, the delay memory 110 is a signal stored in the memory 100 and the voice signal with a slight time delay the P / S Saves the input from the S separator. In general, the time delay here is when a radio wave is reflected from a building, a transmission line, or the like, and there are two propagation paths from a transmitting antenna to a receiving antenna. It means the time difference between. However, since the time difference varies from region to region, a procedure for comparing data stored in the two memories is necessary to identify the time difference.

The comparator 120 compares the two voice signals to determine how much time difference there is between the same signal stored in the memory 100 and the delay memory 110. The delay detector 130 detects a time difference between two identical voice signals based on a comparison result output from the comparator 120. The voice controller 140 outputs a control signal to the voice processor based on the time difference detected by the delay detector 130 to remove a sound interference, which is the same voice signal that is output after a reference signal and is later output by the detected time difference. .

Now, the operation of the television with sound interference cancellation function according to the present invention will be described in detail.

First, a broadcast signal obtained by synthesizing a video signal and an audio signal is separated from the P / S separation unit through an antenna, a tuner unit, and an IF detector, and processed as a video signal and an audio signal, respectively. At this time, before the voice signal is processed by the voice processor, the voice signal undergoes a procedure of eliminating sound interference according to the present invention.

The voice signal is separated from the P / S separation unit and output to the voice processing unit, and also to the memory and the delay memory to determine whether the same voice signal is received with a slight time difference. That is, the voice signal received at the reference time is stored in the memory, and the received voice signal is stored in the delay memory at some time difference from the time. The delay detection unit determines whether or not it is received.

Then, if it is determined by the delay detector that the same voice signal is received with a time difference, the delay detector outputs the result to the voice controller and the voice controller outputs a reference signal based on the time difference detected by the delay detector. After that, the control unit outputs a control signal to remove the sound interference, which is the same voice signal that is output later by the detected time difference.

The voice processor removes a sound interference component that is delayed by the time difference from a reference signal with respect to an input voice signal according to a control signal output from the voice controller so as to output clean sound quality.

As described above, the present invention has been described with reference to preferred embodiments, but the present invention is not limited thereto, and the present invention may be embodied in various forms by adding various limitations or additions without departing from the technical spirit of the present invention. It is apparent to those skilled in the art to which the present invention pertains.

A television having a sound interference canceling function according to the present invention operating as described above stores a received reference voice signal in a memory, and a voice signal with a time delay therefrom in a delay memory and compares the stored data. It is determined whether there is a delay component between the same voice signals, and if there is a sound interference as a delay component, the noise is removed and outputted, thereby obtaining a clean sound quality instead of a voice mixed with noise by the sound interference.

Claims (1)

A television comprising a P / S separation unit for separating and outputting a video signal and an audio signal from a received broadcast signal, and a audio processing unit for processing an audio signal output from the P / S separation unit to be output by a speaker. A memory for storing a reference voice signal output from the P / S separator; A delay memory for receiving and storing a signal stored in the memory and a voice signal having a time delay from the P / S separator; A comparison unit which receives data output from the memory and the delay memory and compares whether a voice signal having the same component exists; A delay detector for detecting a time difference between the same signals in the case where a voice signal having the same component exists in the memory and the delay memory according to the comparison result output from the comparison unit; And a voice controller configured to output a reference signal based on the time difference detected by the delay detector and to output a control signal to the voice processor to remove sound interference, which is the same voice signal which is output later by the detected time difference. Television with a sound interference cancellation function.