KR100651883B1 - The display device for having fm transmitter and method for controlling the same - Google Patents

Abstract

A video device and a method for controlling the same are provided to fundamentally suppress the generation of field claims due to the image interference of a frequency modulation-transmitter. A frequency search unit(308) searches channel frequencies of a broadcasting signal inputted from a video device and frequency modulation-transmitter channel frequencies. A memory(309) stores the searched channel frequencies and the searched frequency modulation-transmitter channel frequencies. A determining unit(310) determines whether there are identical frequencies among the stored channel frequencies and the stored frequency modulation-transmitter channel frequencies. A channel switching unit(311) sets the farthest frequency from the identical frequencies to one of the frequency modulation-transmitter channel frequencies.

Description

Video device with FM-TV function and its control method {The display device for having FM transmitter and method for controlling the same}

1 is a flow chart (flow chart) showing a control method of a video device having an FM-TX function according to the prior art;

FIG. 2 is a diagram illustrating a screen in which noise is generated in a video device having an FM-TX function according to the related art.

3 is a block diagram showing the configuration of a video device having an FM-TX function according to the present invention;

4 is a flowchart (flow chart) showing a control method of an image device having an FM-TX function according to the present invention;

* Explanation of symbols for main parts of drawings *

301: video device 302: tuner

303: Video / audio processing unit 304: FM-TX unit

305: display unit 306: speaker

307: control unit 308: frequency search unit

309: memory section 310: judgment section

311: Channel changer 320: FM receiver

The present invention relates to a video device, and more particularly, to a video device having an FM-TX function and a control method thereof.

1 is a flowchart (flow chart) showing a control method of a video device having an FM-TX function according to the prior art. Hereinafter, referring to FIG. 1, a control method of a video device having an FM-TX function according to the prior art will be described.

Here, the image device having the FM-TX function means a device that allows the image device to wirelessly transmit an audio stereo signal of a TV broadcast to FM stereo and be received by an FM radio or the like. In recent years, it can be said to be a function of a video apparatus that has been spotlighted due to various conveniences.

In executing the FM-TX function, the user may first set the FM-TX channel frequency (S101).

In addition, the video apparatus may transmit a signal modulated to FM in response to the FM-TX channel frequency (S102).

In operation S103, the video apparatus may output a broadcast screen corresponding to the channel frequency of the broadcast signal selected by the user while continuing the operation S102.

However, the above-described image apparatus with the FM-TX function and its control method have the following problems.

When the tuned FM-TX channel frequency and the multiplier frequency of the channel signal of the broadcast signal coincide, noise may occur on the channel screen of the matched broadcast signal, and a plurality of field claims may be caused by the image interference of the FM-TX. There was a problem that (Field Claim) could occur. The screen in which the noise is generated is illustrated in FIG. 2.

In more detail, the FM / TX channel frequency that matches the multiplication frequency of the channel frequency of the broadcast signal may be introduced into the video / audio processing unit on the line connecting the video / audio processing unit and the FM-TX unit in the video apparatus. And, the introduced FM-TX frequency has a problem that can be expressed as noise (noise) through the display.

For example, even when a rod antenna is applied, noise may occur more severely, and thus the FM-TX function itself may become meaningless.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to generate noise on a broadcast screen even when the tuned FM-TX channel frequency and the multiplication frequency of the channel frequency of the broadcast signal match. It is to provide a video device having an FM-TX function and a control method thereof that can prevent the source, and eliminate the source of a plurality of field claims due to the image interference of the FM-TX.

It is still another object of the present invention to provide an image device having an FM-TX function and a method of controlling the same, which can implement the present invention programmatically, thereby minimizing the cost for implementing the present invention. will be.

In order to achieve the above object, the present invention provides a frequency retrieval unit for retrieving the channel frequencies of the broadcast signal input to the video device and the frequency modulation-transmitter (FM-TX) channel frequency, and multiplying the channel frequencies of the retrieved broadcast signal A memory unit for storing frequencies, the retrieved FM-TX channel frequencies, a determination unit for determining whether there is a matching frequency among the stored multiplication frequencies and the FM-TX channel frequencies, and the matching frequency It provides a video device having an FM-TX function, characterized in that it comprises a channel switching unit for setting the frequency located at the farthest distance from the FM-TX channel frequency.

The multiplication frequencies of the channel frequencies of the broadcast signal are preferably frequency values obtained by dividing the channel frequencies of the broadcast signal by a natural number.

It is preferable that the said natural number is 1, 2, 3.

The video device having the FM-TX function may further include a display unit for outputting a list of remaining FM-TX channel frequencies, except for the matching frequencies.

In order to achieve the above object, the present invention comprises the steps of retrieving the channel frequency and the frequency modulation-transmitter (FM-TX) channel frequencies of the broadcast signal input to the video device, and the multiplied frequency of the channel frequencies of the retrieved broadcast signal Storing the retrieved FM-TX channel frequencies, determining whether there is a matching frequency among the stored multiplication frequencies and the FM-TX channel frequencies, and furthest from the matching frequencies. It provides a control method of a video device having an FM-TX function, characterized in that it comprises the step of setting the frequency located in the distance to the FM-TX channel frequency.

The multiplication frequencies of the channel frequencies of the broadcast signal are preferably frequency values obtained by dividing the channel frequencies of the broadcast signal by a natural number.

It is preferable that the said natural number is 1, 2, 3.

Preferably, the method of controlling the video device having the FM-TX function may further include outputting a list of remaining FM-TX channel frequencies, except for the corresponding frequencies.

Therefore, according to the present invention, noise can be prevented from occurring due to image interference due to the FM-TX frequency, and the cost for the implementation of the present invention can be minimized.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention that can specifically realize the above object will be described.

3 is a block diagram showing the configuration of a video device having an FM-TX function according to the present invention. Referring to Figure 3, the signal flow between the components of a video device having an FM-TX function will be described.

As shown in FIG. 3, the main components of the present invention are illustrated, and basic components and signal flows for receiving and displaying a general broadcast signal in a video device are omitted or simplified. However, although the illustration and detailed description of the basic components are omitted or simplified, those skilled in the art can understand the video device having the FM-TX function according to the present invention despite FIG.

The imaging device 301 is a device in which the present invention is implemented and includes components to be described later. There is no particular limitation on the video device 301, but it is preferable that the video device 301 has an FM-TX function.

The tuner unit 302 tunes to a frequency of a certain radio wave (or electric signal), and serves to select and take out only the radio wave.

The video / audio processor 303 controls video and audio data of a predetermined radio wave selected by the tuner 302 to be output through the display 305 and the speaker 306, respectively.

The display unit 305 may display the video data output through the image / audio processor 303.

The speaker 306 may output audio data output through the video / audio processor 303.

The FM-TX unit 304 may convert the audio data received from the video / audio processor 303 into a signal modulated by FM and transmit the same.

The FM receiver 320 may receive and output the FM signal.

More specifically, it will be described with respect to the video device having an FM-TX function of the present invention.

The frequency searcher 308 may search for channel frequencies of a broadcast signal captured through an antenna (not shown) of the video device 301. In addition, the frequency searching unit 308 may simultaneously search for FM-TX channel frequencies captured through the FM-TX unit 304.

However, for convenience of explanation, it is assumed here that the channel frequencies of the broadcast signal are 187.25MHZ, 193.25MHZ, 199.25MHZ, 211.25MHZ, 223.25MHZ, and the FM-TX channel frequencies are 96.2MHZ, 96.4MHZ, 96.6MHZ, Let's assume 105.4MHZ, 105.6MHZ.

The memory unit 309 may store multiplication frequencies of channel frequencies of the found broadcast signal and the retrieved FM-TX channel frequencies.

The multiplication frequencies of the channel frequencies of the broadcast signal may be defined as frequency values obtained by dividing the channel frequencies of the broadcast signal by a natural number. In particular, the natural number may be 1, 2, 3, in which case the multiplication frequencies of the channel frequencies of the broadcast signal may be as shown in Table 1 below.

TABLE 1

Channel frequency of broadcast signal 187.25MHZ 193.25MHZ 199.25MHZ 211.25MHZ 223.25MHZ ÷ 1 187.25MHZ 193.25MHZ 199.25MHZ 211.25MHZ 223.25MHZ ÷ 2 93.63MHZ 96.63MHZ 99.63MHZ 105.63MHZ 111.63MHZ ÷ 3 62.42MHZ 64.42MHZ 66.42MHZ 70.42MHZ 74.42MHZ

The determination unit 310 may determine whether there is a matching frequency among the multiplication frequencies stored in the memory unit 309 and the FM-TX channel frequencies.

Among the multiplying frequencies of Table 1 and the hypothesized FM-TX channel frequencies, almost identical ones of the FM-TX channel frequencies may be 96.6 MHZ and 105.6 MHZ. However, to what extent it can be considered as a match here may be determined in consideration of the amount of noise (noise) generated by the overlapping range.

At this time, the channel switching unit 311 may set the frequency (96.2MHZ) located farthest from the corresponding frequencies 96.6MHZ, 105.6MHZ as the FM-TX channel frequency.

Of course, the FM-TX channel frequency may be set to any one of the remaining frequencies 96.2MHZ, 96.4MHZ and 105.4MHZ except for the matching frequencies 96.6MHZ and 105.6MHZ. However, the reason why the FM-TX channel frequency is set to the farthest frequency (96.2MHZ) as described above is to prevent noise on the screen of the video device as much as possible.

In addition, the display unit 305 may output a list of frequencies 96.2MHZ, 96.4MHZ, and 105.4MHZ except for the corresponding frequencies 96.6MHZ and 105.6MHZ, thereby maximizing user convenience. .

4 is a flowchart (flow chart) illustrating a control method of an image device having an FM-TX function according to the present invention. Referring to Figure 4, it will be described a control method of a video device having an FM-TX function according to the present invention.

However, since there is a part overlapping with the above description of Figure 3, a detailed description thereof will be omitted. However, those skilled in the art will be able to understand and implement the control method of the video device having the FM-TX function according to the present invention despite such omission.

A signal for executing the automatic frequency search function may be input (S401). Here, the signal will be referred to as a signal for executing the present invention, the signal may be input by the user pressing a separate button, or the moment the FM-TX function of the video device is executed, the signal is automatically input It may be.

When the signal is input, channel frequencies and FM-TX channel frequencies of the broadcast signal may be searched for (S402).

The multiplied frequencies of the found broadcast signal channel frequencies and the found FM-TX channel frequencies may be stored (S403).

Among the stored multiplication frequencies and the FM-TX frequencies, it may be determined whether there is a matching frequency (S404).

As a result of the determination (S404), when there is a matching frequency, the frequency located at the longest distance from the matching frequencies may be set as the FM-TX channel frequency (S405). Alternatively, any frequency among the remaining FM-TX channel frequencies except for the matching frequencies may be set as the FM-TX channel frequency.

In addition, except for the matching frequencies, the remaining FM-TX channel frequencies may be displayed (S406). At this time, the user of the video apparatus may view the displayed frequencies and select a specific FM-TX channel frequency.

The present invention is not limited to the above-described embodiments, and can be modified by those skilled in the art as can be seen from the appended claims, and such modifications are within the scope of the present invention. .

Referring to the effects of the video device having an FM-TX function and the control method according to the present invention described above are as follows.

According to the present invention, even when the tuned FM-TX channel frequency and the multiplication frequency of the channel frequency of the broadcast signal coincide, the noise is prevented from occurring on the broadcast screen, and the present invention can be implemented programmatically. As a result, there is an effect that can minimize the cost for the implementation of the present invention.

Claims (8)

A frequency searcher for searching channel frequencies of a broadcast signal input to an image device and frequency modulation-transmitter (FM-TX) channel frequencies; A memory unit for storing multiplication frequencies of channel frequencies of the found broadcast signal and the retrieved FM-TX channel frequencies; A determination unit that determines whether there is a matching frequency among the stored multiplication frequencies and the FM-TX channel frequencies; And And a channel switcher for setting a frequency located at a distance farthest from the corresponding frequencies to an FM-TX channel frequency. The method of claim 1, The multiplication frequencies of the channel frequencies of the broadcast signal, And a frequency value obtained by dividing channel frequencies of the broadcast signal by a natural number. The method of claim 2, The natural number is, 1, 2, 3, characterized in that the video device with FM-TX function. The method of claim 1, And a display unit for outputting a list of remaining FM-TX channel frequencies, except for the matching frequencies. Retrieving channel frequencies and frequency modulation-transmitter (FM-TX) channel frequencies of a broadcast signal input to the video device; Storing multiplied frequencies of channel frequencies of the found broadcast signal and the retrieved FM-TX channel frequencies; Determining whether there is a matching frequency among the stored multiplication frequencies and the FM-TX channel frequencies; And And setting a frequency located at a distance farthest from the corresponding frequencies to an FM-TX channel frequency. The method of claim 5, The multiplication frequencies of the channel frequencies of the broadcast signal, And a frequency value obtained by dividing channel frequencies of the broadcast signal by a natural number. The method of claim 6, The natural number is, 1, 2, 3, characterized in that the control method of a video device having an FM-TX function. The method of claim 5, And outputting a list of remaining FM-TX channel frequencies, except for the matching frequencies.

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