KR20050122549A - Digital multimedia broadcasting receiver of outside type - Google Patents

Abstract

The present invention relates to an external digital multimedia broadcasting receiver capable of viewing satellite DMB or terrestrial DMB broadcasting in a computer, a laptop, a mobile phone, a personal mobile terminal, and a television (TV) that do not support DMB reception. Satellite / terrestrial DMB receiver which selectively receives and outputs one of satellite DMB and terrestrial DMB signal transmitted from satellite or terrestrial base station, and satellite which demodulates the satellite DMB signal selected and output from the satellite / terrestrial DMB receiver into original signal DMB signal processing unit, terrestrial DMB signal processing unit for demodulating the terrestrial DMB signal selected and output from the satellite / terrestrial DMB receiving unit into the original signal, and the satellite / terrestrial DMB receiving unit according to the mode selection and channel selection signal transmitted by the user's remote controller. Provides a mode selection signal to select one of the satellite DMB and terrestrial DMB signals. Control to select and output, and control the demodulated signal according to the connected device ID and demodulated satellite DMB signal or terrestrial DMB signal to the rear end by using the remote control and the connected device ID output from the controller. Implement an external DMB receiver with an interface device interface that converts the signal into a suitable signal so that signal processing can be performed on an unsupported connected device, and delivers it to the connected device. DMB broadcasting and terrestrial DMB broadcasting can be watched.

Description

Digital multimedia broadcasting receiver of outside type

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an external digital multimedia broadcasting (hereinafter, abbreviated as "DMB") receiver. In particular, the present invention relates to a satellite DMB or terrestrial DMB in a laptop, personal portable terminal, and television (TV) that does not support DMB reception. The present invention relates to an external digital multimedia broadcasting receiver capable of receiving.

In general, the standard of digital broadcasting is divided into European DVB (Digital Video Broadcasting) method and American VSB (Vestigial Sideband Broadcasting) method. Among them, Korea adopts VSB as a standard for digital TV. In the case of DAB (Digital Audio Broadcasting), the DVB method is adopted as a standard, and DAB has evolved into a DMB capable of providing video services, although the concept was initially limited to radio broadcasting using satellites.

The DVB method improves the commonality of various media such as cable TV, satellite, terrestrial antenna and public antenna (SMATV). The encoding and compression of the signal is based on MPEG2. In addition, the subscriber management function (Conditional Access) is prescribed to be based on a common scrambling algorithm. The DVB system has substandards such as satellite digital TV broadcasting DVB-S (Satellite), digital cable TV broadcasting DVB-C (Cable), and terrestrial digital broadcasting DVB-T.

Digital system E specified in ITU-R BO.1130-4 RECOMMENDATION among the systems for DMB service converts satellite signals transmitted by DVB-S method into CDM (Code Division Multiplexing) signals that the terminal can receive and transmits them. Use a repeater. Repeaters that play this role are commonly referred to as gap fillers. The gap filler is a low power retransmission station that receives and retransmits radio waves emitted from a transmission station so that broadcasts can be received in an area where radio waves are shielded, such as a high density building and a tunnel.

Meanwhile, a brief description of a conventional method for receiving a satellite DMB or terrestrial DMB is as follows.

First, in order to receive satellite DMB, a multi-channel multimedia broadcasting is watched in a vehicle or other place with a personal terminal dedicated to receiving satellite DMB. It provides a multimedia service such as high quality audio broadcasting, high quality video broadcasting and various data services to mobile or fixed subscriber terminals (satellite DMB receiving terminals) using a path through satellite.

When 13.824 ~ 13.883 GHz broadcast signals are transmitted from satellites of the terrestrial satellite digital multimedia broadcasting center to the satellites, the satellites provide 12.214 ~ 12.239 GHz TDM signals for terrestrial relay stations to provide the terminal with high quality signals. The terminal transmits a signal of 2.630 ~ 2.655GHz for direct reception. The terrestrial relay station is a system for transmitting a signal for a terminal in an area where satellite signals cannot reach. The terrestrial relay station demodulates a time multiplex signal of 12.214 to 12.239 GHz and divides the code so that mobile reception can be performed even in a multi-fading environment such as an urban area. Modulate into multiple signal and output as 2.630 ~ 2.655GHz signal.

In addition, the terminal may use a variety of types, such as fixed or mobile or attached to the vehicle, and receives the signal directly from the satellite or through the ground relay station. The satellite DMB system as described above is a technology introduced for a service suitable for a mobile reception and a multi-fading environment, and can smoothly provide a service even in an urban area or a high-speed driving.

On the other hand, the method for receiving terrestrial DMB also, similar to the well-known satellite DMB receiving method, the terrestrial DMB reception terminal must be provided to receive the terrestrial DMB.

In other words, in order to receive satellite DMB or terrestrial DMB, it is possible to receive satellite DMB or terrestrial DMB only by using a dedicated DMB terminal, and DMB broadcasting is received in current laptops, personal portable terminals and televisions which do not have a DMB receiving function. Can not.

Therefore, users who own a laptop, personal portable terminal, or television that do not currently have a DMB reception function must purchase an expensive DMB dedicated terminal separately to watch satellite DMB or terrestrial DMB. This is very burdensome for the user.

Accordingly, an object of the present invention is to provide an external digital multimedia broadcasting receiver capable of watching satellite DMB or terrestrial DMB broadcasting in a laptop, a personal mobile terminal, and a TV that do not support DMB reception.

"External digital multimedia broadcasting receiver" according to the present invention for achieving the above object,

A satellite / terrestrial DMB receiver for selectively receiving and outputting one of satellite DMB and terrestrial DMB signals transmitted from a satellite or terrestrial base station;

A satellite DMB signal processor for demodulating the satellite DMB signal selected and output by the satellite / terrestrial DMB receiver into an original signal;

A terrestrial DMB signal processor for demodulating the terrestrial DMB signal selected and output by the satellite / terrestrial DMB receiver into an original signal;

Provides a mode selection signal to the satellite / terrestrial DMB receiver according to the mode selection and channel selection signal transmitted by the user's remote controller to select and control one of the satellite DMB and terrestrial DMB signals to control the output, and the satellite DMB signal processor and the terrestrial wave A control unit for controlling an operation of the DMB signal processing unit, and outputting the connected device ID selected by the user and a demodulated satellite DMB signal or a terrestrial DMB signal to a rear stage;

And a connection device interface unit for converting a demodulated signal according to the connection device ID output from the control unit into a signal suitable for signal processing in a connected device that does not support DMB reception and delivering the signal to the connection device. do.

In the above, the satellite / terrestrial DMB receiver,

A mode selector which generates a switching control signal and a mode select signal (channel select signal) according to the mode select signal output from the controller;

A satellite DMB tuner module for tuning and outputting a satellite DMB signal transmitted from a satellite according to a mode selection signal provided by the mode selection unit;

A terrestrial DMB tuner module for tuning and outputting a terrestrial DMB signal transmitted from a terrestrial base station according to a mode selection signal provided by the mode selector;

A first switch and a second switch configured to connect the satellite DMB signal output from the satellite DMB tuner module or the terrestrial DMB signal output from the terrestrial DMB tuner module to a rear end according to the switching control signal output from the mode selector. It is done.

In the above, the interface device interface unit,

A signal converter converting the demodulated signal according to the connected device ID output from the controller into one of a USB interface signal, an intermediate frequency (IF) signal, an S-VHS signal, and a TCP / IP signal for the Internet;

A USB interface module for transferring a USB interface signal selectively output from the signal converter to a USB-enabled connection device that does not support DMB reception;

An IF interface module for transferring an intermediate frequency (IF) signal selectively output from the signal converter to an IF-enabled access device that does not support DMB reception;

An S-VHS interface module for transmitting an S-VHS signal selectively output from the signal converter to an S-VHS-enabled access device that does not support DMB reception;

Characterized in that the TCP / IP interface module for transmitting a TCP / IP signal for the Internet selectively output from the signal converter to a wired / wireless Internet router that does not support DMB reception.

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

1 is a conceptual diagram illustrating the concept of the present invention.

Here, reference numeral 110 denotes a satellite transmitting satellite DMB signals, reference numeral 120 denotes a terrestrial base station transmitting terrestrial DMB signals, and reference numeral 200 denotes a satellite DMB transmitted from the satellite 110 and the terrestrial base station 120. Represents an external DMB receiver that receives a signal or terrestrial DMB signal and delivers it to an access device 300 that does not support DMB reception. Reference numeral 400 denotes a user remotely selecting a satellite DMB / terrestrial DMB mode and selecting a channel. Represents the remote control to select the external device.

In the above description, the connection device 300 represents a notebook 310, a personal portable terminal 320, a television 330, a wired / wireless internet router 340, etc., which are not supported for DMB reception.

According to the present invention configured as described above, when a user remotely selects a satellite DMB or terrestrial DMB signal with a remote controller 400 and selects a channel and an access device, the satellite transmitted by the satellite 110 from the external DMB receiver 200 is selected. After receiving the DMB signal and the terrestrial DMB signal transmitted from the terrestrial base station 120, the DMB reception is performed by converting the signal into a signal suitable for the access device 300 that does not support DMB reception and interfacing to the corresponding access device 300. It will be able to receive satellite DMB or terrestrial DMB broadcasts from unsupported laptops, personal handheld devices, or devices connected to televisions or wireless Internet routers.

2 is a block diagram showing the configuration of an external digital multimedia broadcasting receiver according to the present invention.

As shown therein, a satellite / terrestrial DMB receiver 210 for selectively receiving and outputting one of the satellite DMB and terrestrial DMB signals transmitted from the satellite 110 or the terrestrial base station 120; A satellite DMB signal processor 220 which demodulates the satellite DMB signal selected and output by the satellite / terrestrial DMB receiver 210 into an original signal; A terrestrial DMB signal processor 230 for demodulating the terrestrial DMB signal selected and output by the satellite / terrestrial DMB receiver 210 into an original signal; A mode selection signal is provided to the satellite / terrestrial DMB receiver 210 according to the mode selection and channel selection signal transmitted by the user to the remote controller 400 to select and control one of the satellite DMB and terrestrial DMB signals, and to control the output. Controls the operation of the DMB signal processor 220 and the terrestrial DMB signal processor 230, and outputs the connected device ID and demodulated satellite DMB signal or terrestrial DMB signal selected by the user using the remote controller 400 to the rear stage. A controller 240; An interface device interface for converting a demodulation signal into a signal suitable for signal processing in the connection device 300 that does not support DMB reception according to the connection device ID output from the control unit 240 and delivering the demodulated signal to the connection device 300. Section 250; The control unit 240 and the power supply unit 260 for supplying the power required for the portion requiring power.

In the above, the satellite / terrestrial DMB receiver 210, as shown in Figure 3,

A mode selector 211 for generating a switching control signal and a mode select signal (channel select signal) according to the mode select signal output from the controller 240; A satellite DMB tuner module 212 for tuning and outputting a satellite DMB signal transmitted from the satellite 110 according to a mode selection signal provided from the mode selector 211; A terrestrial DMB tuner module 213 for tuning and outputting the terrestrial DMB signal transmitted from the terrestrial base station 120 according to the mode selection signal provided by the mode selector 211; The satellite DMB signal output from the satellite DMB tuner module 212 or the terrestrial DMB signal output from the terrestrial DMB tuner module 213 according to the switching control signal output from the mode selector 211 is connected to the rear end. It consists of first and second switches 214 and 215.

In addition, the connection device interface 250, as shown in FIG.

A signal that converts the demodulated signal according to the connected device ID output from the controller 240 into one of a USB interface signal, an intermediate frequency (IF) signal, an S-VHS signal, and a TCP / IP signal for the Internet and outputs the signal. A converter 255; A USB interface module 251 for transferring a USB interface signal selectively output from the signal converter 255 to a USB-enabled connection device 310 that does not support DMB reception; An IF interface module 252 for transferring an intermediate frequency (IF) signal selectively output from the signal converter 255 to an IF-enabled access device 320 that does not support DMB reception; An S-VHS interface module 253 for transmitting the S-VHS signal selectively output from the signal converter 255 to an S-VHS-enabled access device 330 which is not supported for DMB reception; Receiving satellite DMB / terrestrial DMB signal from a TCP / TP-enabled device that does not support DMB reception by transmitting a TCP / IP signal for the Internet selectively output from the signal converter 255 to the wired / wireless internet router 340. It consists of a TCP / IP interface module 254 that enables this.

The operation of the external digital multimedia broadcasting receiver according to the present invention configured as described above will be described in detail with reference to FIGS. 1 to 3 as follows.

First, the power supply unit 260 makes the power supplied to the microprocessor 241 in the control unit 240 and other parts requiring power to supply the power appropriately. The power applied to the power supply unit 260 is a home AC power source, a vehicle DC power source, a battery power source, and an internal power source of the connected equipment.

When power is supplied, the microprocessor 241 in the control unit 240 initializes the system, and the user operates the remote control unit 400 through the remote control signal receiver 244 (satellite DMB selection mode, terrestrial DMB selection mode, After receiving the channel selection mode, the connected device selection mode) signal, the control module 242 generates a control signal and transmits the mode selection signal to the satellite / terrestrial DMB receiver 210.

Here, the remote controller 400 may be any remote control of an RF signal method, a Bluetooth signal method, and an infrared data (IRDA) method, and the remote control signal receiver 244 may also be the RF signal method and a Bluetooth signal method. It is implemented to receive a signal of an infrared data (IRDA) remote control. Here, since the remote controller 400 and the remote control signal receiver 244 are well known technologies, detailed description thereof will be omitted.

Meanwhile, the satellite / terrestrial DMB receiver 210 receiving the mode selection signal may be connected to one of the satellite DMB tuner module 212 or the terrestrial DMB tuner module 213 according to the mode selection signal applied from the mode selector 211. An operation signal is applied and the first switch 214 or the second switch 215 is turned on correspondingly.

If the satellite DMB signal is received, the satellite DMB tuner module 212 operates to tune and output the satellite DMB signal transmitted from the satellite 110, and the satellite DMB signal thus output is turned on. The switch 214 is transmitted to the satellite DMB signal processor 220 at a later stage.

Similarly, when terrestrial DMB signal is received, the terrestrial DMB tuner module 213 operates to tune and output the terrestrial DMB signal transmitted from the terrestrial base station 120, and the terrestrial DMB signal thus output is turned on. It is transmitted to the terrestrial DMB signal processor 230 at a later stage through the two switches 215.

Here, the first and second switches 214 and 215 operate in correspondence with the satellite DMB tuner module 212 and the terrestrial DMB tuner module 213. For example, when the satellite DMB tuner module 212 operates, only the first switch 214 is turned on, and when the terrestrial DMB tuner module 2130 operates, only the second switch 215 is turned on. .

On the other hand, when receiving a satellite DMB signal, the analog-to-digital converter 221 in the satellite DMB signal processing unit 220 converts the analog satellite DMB signal transmitted through the first switch 214 into a digital signal corresponding thereto. To the satellite DMB signal processing module 222. The satellite DMB signal processing module 222 demodulates the digital satellite DMB signal input according to a program stored in the memory 223 into an original signal, and transmits the demodulated signal to the microprocessor 241 in the controller 240. Here, reference numeral 224 denotes a voltage controlled oscillator (VCXO) that generates an oscillation clock and provides it to the satellite DMB signal processing module 222. Since the configuration of the satellite DMB signal processing unit 220 is the same as the technical configuration for processing the known satellite DMB signal, a detailed description thereof will be omitted.

In addition, when receiving the terrestrial DMB signal, the analog-to-digital converter 231 in the terrestrial DMB signal processor 230 converts the analog terrestrial DMB signal transmitted through the second switch 215 into a corresponding digital signal. To the terrestrial DMB signal processing module 232. The terrestrial DMB signal processing module 232 demodulates the digital terrestrial DMB signal input according to a program stored in the memory 234 into an original signal, and transmits the demodulated signal to the microprocessor 241 in the controller 240. Here, reference numeral 233 denotes a voltage controlled oscillator (VCXO) which generates an oscillation clock and provides it to the terrestrial DMB signal processing module 232. Since the configuration of the terrestrial DMB signal processing unit 230 is the same as the technical configuration for processing a known terrestrial DMB signal, a detailed description thereof will be omitted.

The microprocessor 241 transmits the selectively applied satellite DMB demodulation signal or terrestrial DMB demodulation signal to the interface device interface 250. At this time, the microprocessor 241 provides the connected device interface unit 250 with the connected device ID corresponding to the connected device selected by the user using the remote controller 400.

The signal converter 255 in the interface device 250 recognizes the connection device ID (unique number) provided by the microprocessor 241, and demodulates the satellite DMB signal output from the microprocessor 241. Alternatively, the terrestrial DMB signal is converted into a signal corresponding to the recognized connected device, and the USB interface module 251, the IF interface module 252, the S-VHS interface module 253, and the TCP / IP interface module 254 of the rear stage are converted. Alternatively, deliver).

That is, when the recognized connection device ID is an ID indicating that the computer (PC) or notebook 310 uses the USB signal, the input demodulation signal is converted into a USB type signal and transferred to the USB interface module 251. do.

Then, the USB interface module 251 transmits the transmitted USB signal to a USB-enabled connection device (for example, a notebook) 310 that does not support DMB reception.

In addition, when the recognized connection device ID is an ID indicating that the mobile device or the personal portable terminal 320 uses the IF signal, the input demodulation signal is converted into an IF signal and transmitted to the IF interface module 252.

Then, the IF interface module 252 delivers the transmitted intermediate frequency (IF) signal to an IF-enabled access device (eg, a personal mobile terminal) 320 that does not support DMB reception.

In addition, when the recognized connection device ID is a television 330 or a monitor indicating the use of the S-VHS signal, the input demodulation signal is converted into an S-VHS signal and the S-VHS interface module 253 is used. To pass).

Then, the S-VHS interface module 253 transmits the transmitted S-VHS signal to an S-VHS-enabled access device (eg, a television) 330 that is not supported for DMB reception.

In addition, when the recognized connection device ID is an ID indicating that the wired / wireless internet router 340 uses a TCP / IP signal, the input demodulation signal is converted into a TCP / IP signal and the TCP / TP interface module is used. Forward to 254.

Then, the TCP / IP interface module 254 transmits the transmitted TCP / IP signal to the wired / wireless internet router 340, so that a satellite DMB signal or terrestrial wave is used in a device using a TCP / IP signal that is not supported for DMB reception. Allow the DMB signal to be received.

This will allow satellite DMB broadcasting and terrestrial DMB broadcasting to be viewed using an external DMB receiver according to the present invention even in existing computers (PCs), laptops, mobile phones, personal portable terminals, televisions, monitors, etc., which do not support DMB reception. .

According to the present invention described above, the satellite DMB signal or the terrestrial DMB signal can be easily interfaced to a device not supported by the DMB reception.

As a result, it is possible to easily watch satellite DMB broadcasting or terrestrial DMB broadcasting in computers, laptops, mobile phones, personal portable terminals, monitors, and televisions, which are not previously supported with DMB reception.

1 is a conceptual diagram illustrating the concept of the present invention,

2 is a block diagram showing the configuration of an external digital multimedia broadcasting receiver according to the present invention;

3 is a block diagram illustrating a configuration of an embodiment of each part of FIG. 2.

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

200 ..... External DMB Receiver

210 ..... Satellite / Terrestrial DMB Receiver

220 ..... Satellite DMB Signal Processing Unit

230 ..... Terrestrial DMB Signal Processing Unit

240 ..... Controls

250 ..... Interface device

300 ..... Equipment

Claims (3)

In the receiver for receiving digital multimedia broadcasting (DMB) transmitted through a satellite or terrestrial base station, A satellite / terrestrial DMB receiver for selectively receiving and outputting one of satellite DMB and terrestrial DMB signals transmitted from the satellite or terrestrial base station; A satellite DMB signal processor for demodulating the satellite DMB signal selected and output by the satellite / terrestrial DMB receiver into an original signal; A terrestrial DMB signal processor for demodulating the terrestrial DMB signal selected and output by the satellite / terrestrial DMB receiver into an original signal; Provides a mode selection signal to the satellite / terrestrial DMB receiver according to the mode selection and channel selection signal transmitted by the user's remote controller to select and control one of the satellite DMB and terrestrial DMB signals to control the output, and the satellite DMB signal processor and the terrestrial wave A control unit for controlling an operation of the DMB signal processing unit, and outputting the connected device ID selected by the user and a demodulated satellite DMB signal or a terrestrial DMB signal to a rear stage; And a connection device interface unit for converting a demodulated signal according to the connection device ID output from the control unit into a signal suitable for signal processing in a connected device that does not support DMB reception and delivering the signal to the connection device. External digital multimedia broadcasting receiver. According to claim 1, The satellite / terrestrial wave DMB receiving unit, A mode selector which generates a switching control signal and a mode select signal (channel select signal) according to the mode select signal output from the controller; A satellite DMB tuner module for tuning and outputting a satellite DMB signal transmitted from a satellite according to a mode selection signal provided by the mode selection unit; A terrestrial DMB tuner module for tuning and outputting a terrestrial DMB signal transmitted from a terrestrial base station according to a mode selection signal provided by the mode selector; A first switch and a second switch configured to connect the satellite DMB signal output from the satellite DMB tuner module or the terrestrial DMB signal output from the terrestrial DMB tuner module to a rear end according to the switching control signal output from the mode selector. External digital multimedia broadcasting receiver. The method of claim 1, wherein the interface device interface unit, A signal converter converting the demodulated signal according to the connected device ID output from the controller into one of a USB interface signal, an intermediate frequency (IF) signal, an S-VHS signal, and a TCP / IP signal for the Internet; A USB interface module for transferring a USB interface signal selectively output from the signal converter to a USB-enabled connection device that does not support DMB reception; An IF interface module for transferring an intermediate frequency (IF) signal selectively output from the signal converter to an IF-enabled access device that does not support DMB reception; An S-VHS interface module for transmitting an S-VHS signal selectively output from the signal converter to an S-VHS-enabled access device that does not support DMB reception; The TCP / IP signal selectively output from the signal converter is transferred to a wired / wireless internet router that does not support DMB reception so that a satellite DMB signal or a terrestrial DMB signal can be received from a device connected to the wired / wireless internet router. External digital multimedia broadcasting receiver, characterized in that consisting of a TCP / IP interface module.