KR20060057084A - Mobile phone for receiving composite video signal - Google Patents

Abstract

The present invention provides a mobile communication terminal capable of receiving a composite video signal for a television through a wired ICC connector, comprising: an LCD screen for displaying text and images; A tuner which receives a composite video signal for television transmitted through a plurality of channels, selects one channel among the plurality of channels according to the channel control signal, and transmits the composite video signal received through the selected channel to the ICC connector; And a controller for outputting a channel control signal for controlling channel selection of the tuner to the tuner through the ICC connector, and displaying a composite image signal of a specific channel transmitted from the tuner and connected through the ICC connector on the LCD screen.

Mobile communication, terminal, tuner, TV, video

Description

Mobile phone terminal for receiving a video signal for a TV

1 is a block diagram of a mobile communication terminal for receiving a video signal for a television according to an embodiment of the present invention.

FIG. 2 is a configuration diagram of the tuner in FIG. 1. FIG.

3 is a flowchart illustrating a process of receiving a composite video signal through a mobile communication terminal according to the present invention.

4A and 4B illustrate screens for explaining a process of receiving a composite video signal by a mobile communication terminal according to the present invention.

Explanation of symbols on the main parts of the drawings

11: keypad 12: memory

13: control unit 14: LCD screen

15: RF processor 16: speaker

17: microphone 18, 23: first and second ICC connector

20: tuner 21: tuning section

22: video decoder

The present invention relates to a mobile communication terminal for receiving a video signal for television, and more particularly, to a mobile communication terminal capable of receiving a composite video signal for television via an ICC connector for connecting data transmitted by wire.

In order to adapt to the rapidly developing digital civilization environment, modern people must acquire a lot of knowledge. That is, computers, mobile communication terminals, PDAs, notebook computers, MP3 players, digital cameras, digital TVs, digital recorders, USB portable hard devices, and the Internet are the products of the above-mentioned digital civilization. And knowledge of how to use and use it.

On the other hand, the best civilization among these products is the computer, followed by the mobile terminal. In other words, the mobile communication terminal is a device that enables communication between different counterparts regardless of time and place, and thus the mobile terminal has been increasing in popularity and use day by day.

In addition, not only providing a call but also supporting various data transmission functions, camera functions, and entertainment functions, etc., has become an essential portable device of modern people. Recently, in order to provide users with more various communication services through a mobile communication terminal, a technology for adding a function of receiving a composite video signal for television to a mobile communication terminal has been proposed.                         

Typical TV receivers are TV tuner modules that receive TV signals and output composite video signals, video decoders that convert composite video signals to digital devices, and PCI (Peripheral Component Interconnection) to deliver digital image data to a computer. A) consists of an interface chip.

Accordingly, in the conventional mobile communication terminal, the composite video signal transmitted through a plurality of channels must be directly received by wireless, and thus an antenna for TV reception and a tuner have to be built in. In the case of embedding the equipment for TV reception, the mobile communication terminal has a problem that the internal configuration is very complicated, the volume and weight are increased, and the product price is increased.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a mobile communication terminal capable of receiving a composite video signal for television via a wired ICC connector.

Another object of the present invention is to provide a mobile communication terminal capable of increasing the reception sensitivity of a composite video signal for television by receiving a composite video signal received by an outdoor antenna for a television via an ICC connector.

Another object of the present invention is to provide a mobile communication terminal that can be implemented by externally implementing a tuner for receiving and tuning a composite video signal for television to the ICC connector, thereby increasing the utility of the ICC connector.

It is another object of the present invention to receive a composite video signal received by a television antenna via a wire without going through a wireless communication service provided by a wireless communication provider, without paying a separate wireless communication service fee for watching TV. Provided is a mobile communication terminal capable of watching over-the-air broadcasting at a relatively low cost.

According to an aspect of the present invention, there is provided a mobile communication terminal including an ICC connector for connecting various data transmitted through a wire, comprising: a liquid crystal display for displaying text and images; A tuner which receives a composite video signal for television transmitted through a plurality of channels, selects one channel among the plurality of channels according to a channel control signal, and transmits the composite video signal received through the selected channel to the ICC connector; And outputting a channel control signal for controlling channel selection of the tuner to the tuner through the ICC connector, and displaying a composite video signal of a specific channel transmitted from the tuner and connected through the ICC connector on the LCD screen. And a control unit.

According to the present invention having such a configuration, when watching over-the-air broadcasts wirelessly through a wireless communication system, not only the reception sensitivity is low, but also additional equipment for receiving over-the-air reception should be provided in the mobile communication terminal, which makes the internal configuration of the product complicated. In order to solve the problem of high manufacturing cost, the external tuner is implemented as an external type. This tuner is connected to the mobile communication terminal through the ICC connector and receives the composite video signal through the coaxial cable. There is an advantage that can be connected to a mobile communication terminal by receiving a composite video signal transmitted from a broadcasting station.

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

1 is a block diagram of a mobile communication terminal for receiving a video signal for a television according to an embodiment of the present invention.

Referring to FIG. 1, the mobile communication terminal of the present invention stores a keypad 11 for inputting a user command related to reception of a television composite video signal, a call service, various additional services, and the like, and stores text and video information. A control unit 13 for controlling reception of a composite video signal for television, and for providing a call and various additional services according to a user's instruction input through the memory 12 and the keypad 11, and a control unit ( 13 is a liquid crystal display (LCD) 14 for displaying texts and images transmitted by 13), and baseband signals transmitted by the control unit 13 are converted into high frequency signals and transmitted to the outside and received through a base station. A radio frequency processor 15 for converting a high frequency signal into a baseband signal and connecting it to the controller 13, a speaker 16 for outputting various sound signals transmitted by the controller 13 to the outside, User and a voice, and a microphone 17 for inputting various kinds of sound signals, the 1 ICC connector 18 for connecting the data received over the wire to control unit 13.

In addition, the mobile communication terminal of the present invention tunes the composite video signal received through the outdoor antenna for television (channel) for each channel and transmits it to the control unit 13, but controls the plurality of channels under the control of the control unit 13. The tuner 20 transmits the composite video signal received through any one channel among the received composite video signals to the controller 13 through the first ICC connector 18.

On the keypad 11, keys for inputting numbers, symbols, characters, etc., keys for selecting various menus and executing various functions are arranged, and these keys generate key signals when a specific key is pressed by the user. Transfer to control unit 13. That is, the user inputs through the keypad 11 a user command relating to television reception, channel selection and the like for implementing the present invention.

The memory 12 stores text and image information and various programs transmitted by the control unit 13, and stores a phone book and various additional service information in the file area. The execution code area stores an execution program for providing a call and various additional services, and also stores an execution program for receiving a composite video signal for television, a program for channel selection of a television, and the like.

The control unit 13 controls the reception of the composite video signal for television and the channel selection of the television according to a user's instruction input through the keypad 11, which will be described below.

When the user instructs reception of the television composite video signal using the key on the keypad 11, the control unit 13 executes the television execution program stored in the memory 11. When the television execution program is executed in this way, the control unit 13 converts the signal connection system of the first ICC connector 18 into a signal connection system for connecting the tuner 20 to receive a composite video signal for television. Convert                     

In this state in which the first ICC connector 18 is converted into the television signal connection system, the control unit 13 controls the tuner 20 to receive the television composite video signal according to the user's instruction. At this time, the tuner 20 transmits the composite video signal received for each channel through the outdoor antenna for television to the control unit 13 through the first ICC connector 18, but the channel control signal is not input from the control unit 13. If not, the composite video signal of the channel set as the default is transmitted to the controller 13. If the user selects any one of the plurality of channels using the key, the control unit 13 selects the composite video signal of the channel selected by the user from among the composite video signals received by the tuner 20 through the plurality of channels. Control to transmit.

As described above, when the tuner 20 transmits the composite video signal of a specific channel to the controller 13 through the first ICC connector 18, the controller 13 transmits the received composite video signal to the LCD screen 14 in real time. If the audio signal included in the composite video signal is displayed, the controller 13 outputs the audio signal to the outside through the speaker 16.

The first ICC connector 18 is composed of 24 pins, which are distinguished to receive signals transmitted to multiple signal connection systems, for example, for UART port, USB port, and hands-free. Port and so on. Here, the pins for the UART port connect signals transmitted through the signal system of the UART connection method, the pins for the USB port connect signals transmitted through the signal system of the USB connection method, and the handsfree pins indicate the hands free (not shown). Connect the signal transmitted / received through

However, when the user instructs the reception of the composite video signal for television using the key, the control unit 13 converts the signal system of the first ICC connector 18 as follows.

Of the 24 pins of the first ICC connector 18, four pins are converted for channel control signal connection to allow the channel control signal output from the control unit 13 to be transmitted to the tuner 20, and eight pins are tuner. A digital composite video signal transmitted from 20 is converted for the digital composite video signal connection, and two pins are converted for a power supply for supplying power of a battery (not shown) to the tuner 20; The two pins are converted to broadcast type control signals for connecting the broadcast type control signals output from the control unit 13, that is, control signals for selecting over-the-air or cable broadcasts to the tuner 20. The pins other than the pins whose signal connection schemes have been changed among the 24 pins remain in the default state, but these pins can also be converted in accordance with the function added to the control unit 13.

As described above, when the user instructs the termination of the broadcast reception using a key while the signal connection system of the pins of the first ICC connector 18 is converted, the control unit 13 transmits the signal through the first ICC connector 18. The broadcast reception is terminated and the pins of the first ICC connector 18 are converted back to the default state, that is, the UART port, the USB port, the hands-free port, and the like.

The configuration of the tuner 20 connected to the first ICC connector 18 having such a structure will be described with reference to FIG. 2.

As shown in FIG. 2, the tuner 20 receives an analog composite video signal for television transmitted through a plurality of channels, and receives the analog composite video signal received according to a channel control signal provided from the controller 13. A tuning unit 21 for outputting an analog composite video signal received through a specific channel, and converting the analog composite video signal of a specific channel tuned by the tuning unit 21 into a digital composite video signal and transmitting it to the control unit 13. The video decoder 22 and various control signals transmitted from the control unit 13 are connected to the tuning unit 21, and a digital composite video signal converted by the video decoder 22 is connected to the control unit 13. 2 ICC connector 23 is provided.

The tuner 20 further includes a connection terminal 24 for connecting the composite video signal received through the television outdoor antenna or the composite video signal transmitted through a cable from a cable broadcasting station to the tuner 20. However, the connection terminal 24 is connected to the tuner 20 through a coaxial cable. In addition, the connection terminal 24 is connected to a connection terminal (not shown) provided at one end of the coaxial cable connected to the outdoor antenna for television, or connected to a connection terminal (not shown) provided at one end of the coaxial cable for cable broadcasting.

The tuning unit 21 receives a composite video signal of all channels transmitted to an over-the-air broadcasting station or a cable broadcasting station, and outputs an analog composite video signal of a channel designated by the control unit 13 among the composite video signals received through a plurality of channels. Output to (22).

The video decoder 22 converts the analog composite video signal output from the tuning unit 21 into a digital composite video signal in order for the control unit 13 to recognize the composite video signal, and then connects the second ICC connector 23. Transfer to the control unit 13 through.

The tuner 20 is driven by a power source of the battery applied through the first and second ICC connectors 18 and 23, but is not necessarily limited thereto, and may be implemented to be driven by another power source such as, for example, a battery. Can be.                     

The second ICC connector 23 is connected to the first ICC connector 18 and has the same pin structure and signal connection structure as the first ICC connector 18.

A process of receiving a composite video signal for a television through the mobile communication terminal having the configuration as described above will be described in detail with reference to FIG.

Referring to Fig. 3, when a user instructs reception of a composite video signal for television using a key on the keypad 11, the control unit 13 sets the television reception mode (S301). In the setting process S301, when the user presses the menu key, the controller 13 displays the menu items stored in the memory 12 on the LCD screen 14 as shown in FIG. 4A, at which time the user presses the key. When the TV (TV) reception item is selected, the control unit 13 executes the execution program for the television stored in the memory 11.

When the television reception mode is set, the control section 13 first converts the signal connection system of the pins constituting the first ICC connector 18 as described above (S302). In the conversion process S302, the control unit 13 converts the signal connection system of the first ICC connector 18 regardless of whether the first and second ICC connectors 18 and 23 are connected, in which case the first and second ICC connectors 18 and 23 are converted. The second ICC connectors 18 and 23 have the same signal connection system.

In the television reception mode, when the user selects the over-the-air broadcasting from the over-the-air broadcasting or the cable broadcasting using the key, the control unit 13 sets the over-the-air control signal for setting the over-the-air broadcasting mode and controlling to receive the composite video signal for over-the-air broadcasting. The transmission is transmitted to the tuning unit 21 through the second ICC connectors 18 and 23 (S303). In the transmission process (S303), when the user selects the TV reception item from the menu item shown in Fig. 4A, the control unit 13 sets the menu item, i.e., airwaves set in the sub path of the selected TV reception item as shown in Fig. 4B. The broadcast item and the cable broadcast item are displayed on the LCD screen 14. In this case, the user presses a key to select a broadcast that he wants to watch, for example, an airwave broadcasting item.

In the over-the-air broadcasting mode, the tuning unit 21 receives an analog composite video signal received through the television outdoor antenna, but receives all of the composite video signals transmitted through a plurality of channels (S304). In the reception process 304, the tuning unit 21 is receiving the composite video signal for over-the-air broadcasting, but if the control unit 13 is set to the cable broadcasting mode, the tuning unit 21 is via a coaxial cable from the cable broadcasting station. Receive composite video signals of all channels.

The tuning unit 21 outputs only the composite video signal received through any one channel among the plurality of received channels to the video decoder 22 (S305). In the output process (S305), if the user selects any one of the channels for over-the-air broadcasting using the keys on the keypad 11, the control unit 13 is a channel for controlling to receive the composite video signal of the channel selected by the user The control signal is transmitted to the tuning unit 21 through the first and second ICC connectors 18 and 23, and in accordance with the channel control signal, the tuning unit 21 performs the video decoder 22 only on the analog composite video signal of a specific channel. ) If the user does not select a specific channel, the control unit 13 also does not transmit the channel control signal. In this case, the tuning unit 21 outputs only the analog composite video signal of the predetermined default channel.

The video decoder 22 converts the analog composite video signal of the channel tuned by the tuning unit 20 into a digital composite video signal, and then, to the controller 13 through the first and second ICC connectors 18 and 23. It transmits (S306).

When the composite video signal of a specific channel is received through the tuner 20 as described above, the controller 13 outputs the received composite video signal in real time so that the user can view it (S307). In the output process (S307), the composite video signal is displayed on the liquid crystal display 14, and if the audio signal included in the composite video signal is included, the controller 13 outputs the audio signal to the speaker 16.

Although the technical spirit of the present invention has been described in detail according to the above-described preferred embodiment, it should be noted that the above-described embodiment is for the purpose of description and not of limitation. In addition, those skilled in the art will understand that various embodiments are possible within the scope of the technical idea of the present invention.

As described above, according to the present invention, a mobile communication terminal receives a composite video signal received through an outdoor antenna for receiving air waves through an ICC connector and a composite video signal transmitted from a cable broadcasting station, thereby wirelessly receiving the composite video signal for airwave broadcasting. It is possible to provide clearer picture quality than when receiving, and to watch over-the-air broadcasts for free.

Claims (6)

A mobile communication terminal having a first connection portion for connecting various data transmitted through a wire, LCD screen for displaying text and images; A tuner which receives a composite video signal for television transmitted through a plurality of channels, selects one channel among a plurality of channels according to a channel control signal, and transmits the composite video signal received through the selected channel to the first connection unit; And A channel control signal for controlling channel selection of the tuner is output to the tuner through the first connection unit, and a composite video signal of a specific channel transmitted from the tuner and connected through the first connection unit is displayed on the LCD screen. Control to display Mobile communication terminal comprising a. The method of claim 1, The tuner is, A tuning unit for receiving an analog composite video signal for television transmitted through a plurality of channels, and outputting an analog composite video signal received through a specific channel among analog composite video signals received according to a channel control signal provided from the control unit; A video decoder for converting an analog composite video signal of a specific channel tuned by the tuning unit into a digital composite video signal and transmitting the digital composite video signal to the controller; And A second connection unit connected to the first connection unit, for connecting various control signals transmitted from the control unit to the tuning unit, and for connecting the digital composite image signal converted by the video decoder to the control unit; Mobile communication terminal comprising a. The method of claim 2, And a broadcast receiving command input from the outside, wherein the control unit converts the signal connection system of the first connection unit to the same as the signal connection system of the second connection unit. The method of claim 2, The tuning unit is characterized in that for receiving a composite video signal received through a plurality of channels via a coaxial cable. The method of claim 2, And the tuning unit outputs a composite video signal of a channel set as a default when a channel control signal is not input from the controller. The method according to any one of claims 1 to 5, And a control unit converts the signal connection system of the first connection unit back to the default signal connection system before conversion when an end command of broadcast reception is input from the outside.

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