KR20050092620A - Apparatus for displaying receiving power of broadcasting signal in mobile communication unit - Google Patents

Abstract

The present invention relates to a mobile communication terminal, and more particularly, to a mobile communication terminal having a broadcast signal receiving function.

The present invention, the operation unit; A display unit for displaying a menu and an operation state; A wireless communication unit for extracting a voice and data signal from a wireless signal transmitted and received through an antenna; A voice input / output unit configured to input and output a voice call signal from the wireless communication unit through a microphone and a speaker; A controller for controlling voice and data communication and controlling the entire system according to an operation signal or an operation state input from the keypad; A mobile communication terminal capable of receiving and outputting an over-the-air broadcast signal, comprising: an over-the-air broadcast signal receiver for extracting and outputting a video signal and an audio signal from a received broadcast signal, wherein the over-air broadcast signal receiver comprises: Detecting reception strength; And controlling, by the control unit, the reception strength of the broadcast signal to be displayed through the display unit.

Description

Signal strength display device for airwave broadcasting signal of mobile communication terminal {APPARATUS FOR DISPLAYING RECEIVING POWER OF BROADCASTING SIGNAL IN MOBILE COMMUNICATION UNIT}

The present invention relates to a mobile communication terminal, and more particularly, to a mobile communication terminal having a broadcast signal receiving function.

Currently, a mobile communication terminal having a function of receiving and outputting a broadcast signal (analog TV signal, multimedia broadcast signal, FM radio signal) has been developed and released.

In general, the mobile communication terminal displays the received strength level of the mobile communication signal (telephone communication, data communication) by shaping the antenna bar of the screen display unit.

However, the mobile communication terminal capable of TV reception or FM radio reception does not have a function of indicating a reception level.

The present invention has been made in such a situation, and an object thereof is to provide a method for displaying a reception strength of a broadcast signal by a mobile communication terminal.

Furthermore, another object of the present invention is to provide a method for displaying a reception strength of an analog TV broadcast signal, a digital multimedia broadcast signal, an FM radio broadcast signal, and various broadcast signals by a mobile communication terminal.

In order to achieve the above object, the present invention provides a display unit of a mobile communication terminal in which a reception intensity detected by an intermediate frequency signal processing unit which receives a broadcast signal signal of an intermediate frequency band, converts the signal into a baseband band, and outputs it as an analog broadcast signal Characterized in that to be output through.

The foregoing and further aspects of the present invention will become more apparent through the following embodiments. Hereinafter, the present invention will be described in detail with reference to the preferred embodiments described with reference to the accompanying drawings so that those skilled in the art can easily understand and reproduce.

1 is a diagram illustrating a configuration of a mobile communication terminal according to an embodiment of the present invention.

As shown, the mobile communication terminal according to the present embodiment is largely the configuration common to the existing mobile communication terminal, the phone control unit 110 and its subcircuits, the over-the-air broadcast signal receiving unit 120, the signal processing unit 111 ).

The accessory circuits include an operation unit 109, a display unit 270 for displaying menus and operating states, a wireless communication unit 113 for extracting voice and data signals from a radio signal transmitted and received through an antenna, and a wireless communication unit 113 from the wireless communication unit 113. And a voice input / output unit 115 for inputting and outputting a voice call signal through a microphone and a speaker.

The operation portion 109 and the display portion 117 composed of a liquid crystal display device or an LED output portion can have a conventional well-known configuration. In addition, the wireless communication unit 113 is configured to include an antenna and RF circuit for communication with the base station. In the present specification, the wireless communication unit 113 is interpreted to include not only various versions of the CDMA scheme but also existing schemes such as cellular, GSM, and W-CDMA schemes, as well as mobile communication schemes that will emerge in the future. The voice input / output unit 115 is a well-known configuration that processes digital voice data into an analog voice signal or vice versa and includes an additional circuit such as an audio amplifying circuit or a filter.

The baseband circuit of the wireless communication unit 113 and most of the circuits of the phone control unit 110 are commercially provided as a single integrated circuit. This integrated circuit, commonly referred to as an MSM chip, includes dedicated hardware to process communications therein, a digital signal processor and a general purpose microprocessor. Logically, these include a communication processing unit for controlling voice and data communication and a system control unit for controlling the entire system in accordance with an operation signal or an operation state input from the operation unit.

In one embodiment, the broadcast signal receiver 120 extracts and outputs a video signal and an audio signal from the received broadcast signal. The signal processor 111 processes a broadcast signal such as a video signal output from the broadcast signal receiver 120 and outputs the same through the display unit 117.

In an exemplary embodiment, data may be interfaced between the signal processor 111 and the over-the-air broadcast signal receiver 120 using a serial bus. In one embodiment, the serial bus It is a bus. Called Inter-IC Is a two-wire, bidirectional serial bus that provides a communication link between integrated circuits. Philips is designed for high volume products such as TVs, VCRs and audio equipment. The bus was introduced 20 years ago.

In one embodiment, the broadcast signal inside the mobile communication terminal is distributed on the bus in a single format, which in one embodiment is YUV format. Accordingly, the over-the-air broadcast signal receiver 120 converts and outputs a broadcast signal into a YUV format, and the signal processor 111 receives and processes a signal of the YUV format.

In one embodiment, the broadcast signal receiving unit 120 includes a tuner unit 103 for demodulating the radio broadcast signal received from the antenna, a decoder unit 105 for decoding the demodulated broadcast signal and outputting it as digital data; And a broadcast signal receiving control unit 101 for controlling the operation in accordance with the control command signal from the apparatus.

The broadcast signal receiver 120 includes an antenna for receiving an air wave signal. This antenna may exist separately from the mobile communication antenna, or in the case of a strip patch antenna type, may be physically shared as one antenna.

The tuner unit 103 may be one of existing analog broadcast tuners such as NTSC and PAL, or a common tuner supporting both of them. In another embodiment, the tuner unit 103 may be a tuner supporting a mobile communication multimedia broadcasting signal such as a satellite based digital multimedia broadcasting (DMB) scheme or a wireless LAN based multimedia broadcasting. In addition, in a preferred embodiment of the present invention, the tuner unit 103 may be a tuner that supports the FM radio signal.

Description of the tuner unit 103 will be described later.

In one embodiment, the decoder unit 105 generates and outputs a digital YUV signal from the analog broadcast signal output of the tuner unit 103.

In one embodiment, the signal processor 111 receives the YUV format 8-bit broadcast data and buffers it in the internal memory, converts the TV signal of the progressive scan method into a sequential scan method, and converts them to the resolution of the display unit 117. And scale by interpolation and / or decimation to fit into and further include a codec for storing or decompressing data into internal memory. In one embodiment, the codec includes an MPEG encoder / decoder and a JPEG encoder / decoder for compressing, storing and reading the captured image frame as a still image. These can be implemented by the DSP and the core. In addition, the signal processor 111 may include a sharpness enhancement circuit for improving image quality, and a contrast and contrast adjustment function. Furthermore, it can include several simple functions for giving graphic effects. The signal processor 111 outputs the processed video broadcast data to the display unit 117 in a 16-bit RGB data format. In addition, according to a preferred embodiment of the present invention, in the case of a digital multimedia broadcasting signal, the signal processing unit 111 analogizes the processed voice broadcasting data and outputs it to the speaker through the audio output unit 107.

2 is a diagram illustrating a configuration of a tuner unit according to an embodiment of the present invention. Hereinafter, a description will be given with reference to FIG. 1.

The aerial TV signal received from the antenna passes through the UHF filter 201 and the VHF filter 203, and is separated into a signal of the UHF band and a signal of the VHF band, respectively. Signals in each band are filtered through their respective Low Noise Amplifiers (205, 207). The filtered signal is supplied to the PLL ice 209, mixed with the intermediate frequency, and demodulated in one step. In this case, an intermediate frequency for each signal is supplied from voltage controlled oscillators 211 and 213 for each band. The oscillation frequencies of these oscillators 211 and 213 are controlled by the broadcast signal reception control unit 101 which controls channel tuning (not shown in FIG. 2 above). The first demodulated signal is bandpass filtered by an IF (intermediate frequency) filter unit 215, and second demodulated by an IF signal processor 217 to be output as an analog broadcast signal. The operation of the IF signal processor 217 is controlled by the broadcast signal reception controller 101.

In one embodiment, if the received broadcast signal is an existing analog broadcast signal such as NTSC or PAL, the IF signal processor 217 outputs the demodulated analog video signal to the decoder 105 and demodulates the analog audio signal. The signal is output to the audio output unit 107. The audio output unit 107 amplifies the analog voice signal and outputs the same through a speaker.

According to an embodiment, when the received broadcast signal is a mobile communication multimedia broadcast signal such as a digital multimedia broadcasting (DMB) scheme or a wireless LAN-based multimedia broadcast, the decoder unit 105 may include an analog broadcast signal including video and audio. Output through

According to a preferred embodiment of the present invention, the IF signal processor 217 detects the reception strength of the received broadcast signal and outputs it to an external controller (broadcast signal reception control unit 101 according to the embodiment of FIG. 2).

In general, the IF signal processor 217, which receives a broadcast signal of an intermediate frequency band, converts it into a baseband band and outputs it as an analog broadcast signal, has a function of detecting a reception strength of a received broadcast signal. The IF signal processor 217 may be implemented by a commercially available chipset. The broadcast signal reception strength detection signal may be an automatic gain control (AGC) signal.

Meanwhile, according to a preferred embodiment of the present invention, the received broadcast signal may be an FM radio signal.

According to an advantageous aspect of the present invention, the tuner unit 103 supports the FM TV broadcast signal as well as the analog TV broadcast signal or the digital multimedia broadcast signal.

The FM radio broadcast signal is, for example, passed through the UHF filter 201 and the UHF LNA 205, and the filtered signal is supplied to the PLL Icy 209, and the channel tuned oscillation corresponding to the FM radio signal from the UHF 211. Depending on the frequency, it is mixed in the PLL chassis 209 and demodulated in one step.

According to a preferred embodiment, the IF signal processor 217 supports an FM TV broadcast signal as well as an analog TV broadcast signal or a digital multimedia broadcast signal. The IF signal processor 217 may be implemented by a commercially available chipset.

1, the broadcast signal reception control unit 101 outputs the reception strength information of the broadcast signal to the phone control unit 110. The phone controller 110 controls the reception strength of the broadcast signal to be displayed through the display unit 117.

According to an embodiment, the phone controller 110 may include an algorithm for mapping the number of antenna bars of the display unit 117 according to the reception strength of the broadcast signal. At this time, the antenna bar for displaying the broadcast signal reception strength may be displayed at the position of the antenna bar of the existing mobile communication reception strength, and in some cases, a new antenna bar position may be prepared for the reception of the broadcast signal.

According to an embodiment, the phone controller 110 may control the display unit 117 to display a reception region and an unreception region according to the reception strength of the broadcast signal.

For example, the phone controller 110 internally stores a reception test value measured for each reception strength, and checks the received broadcast signal reception strength value to display a reception area if the reception threshold is greater than or equal to a reception threshold. If not, the display unit 117 displays an unreceivable area.

According to an embodiment, the display unit 117 includes an LED output unit, and the phone controller 110 may control the LED output according to the reception strength of the broadcast signal.

For example, the phone controller 110 may control the reception of the broadcast signal so that the blue LED is output when the reception is possible and the red LED is output when the reception is impossible.

As described above, according to the preferred embodiment of the present invention, the mobile communication terminal can display the reception strength of the analog TV broadcast signal, the digital multimedia broadcast signal, the FM radio broadcast signal, and various broadcast signals, and can receive the broadcast signal. There is an effect that can inform the user whether or not.

Although the present invention has been described with reference to the accompanying drawings, it should not be construed as being limited thereto, but should be construed to cover many modifications that are obvious from this.

1 is a diagram illustrating a configuration of a mobile communication terminal according to an embodiment of the present invention.

2 is a view showing the configuration of a tuner unit according to an embodiment of the present invention.

Claims (8)

An operation unit; A display unit for displaying a menu and an operation state; A wireless communication unit for extracting a voice and data signal from a wireless signal transmitted and received through an antenna; A voice input / output unit configured to input and output a voice call signal from the wireless communication unit through a microphone and a speaker; A controller for controlling voice and data communication and controlling the entire system according to an operation signal or an operation state input from the keypad; A mobile communication terminal capable of receiving and outputting an over-the-air broadcast signal, including at least a broadcast signal receiver for extracting and outputting a video signal and an audio signal from a received broadcast signal. The airwave broadcasting signal receiving unit, Detecting reception strength of the broadcast signal; The control unit, And performing an operation of controlling the reception strength of the broadcast signal to be displayed through the display unit. The method according to claim 1, The reception strength of the broadcast signal is The airwave broadcasting signal receiving unit is provided by the intermediate frequency signal processing unit for receiving a broadcast signal of the intermediate frequency band, converts to a baseband band and outputs it as an analog broadcast signal; Broadcast signal reception strength display device. The method according to claim 2, The broadcast signal, It is an analog TV broadcast signal; over-the-air broadcast signal reception strength display device of a mobile communication terminal. The method according to claim 2, The broadcast signal, It is a digital multimedia broadcasting signal; The over-the-air broadcasting signal reception strength display device of a mobile communication terminal. The method according to claim 2, The broadcast signal, And a FM radio broadcast signal. The method according to claim 1, The control unit, And controlling the reception area and the reception area not to be displayed through the display unit according to the reception strength of the broadcast signal. The method according to claim 1, The display unit, An LED output; The control unit, And controlling the output of the LED according to the reception strength of the broadcast signal. The method according to claim 1, The control unit, And varying the number of antenna bars of the display unit according to the reception strength of the broadcast signal.