KR100770658B1 - Portable telephone for the receipt of dmb and method for the receipt - Google Patents

Abstract

A portable device for receiving DMB(Digital Multimedia Broadcasting) and a method thereof are provided to receive the DMB satisfactorily though the portable device get out of a receipt area. A portable device for receiving DMB(Digital Multimedia Broadcasting) comprises a storage unit(201), an antenna, a tuner(100), a decoding unit(202), a determining unit(203), a selecting unit(204) and an outputting unit(300). The storage unit(201) stores channel information for each area. The antenna receives DMB signals. The tuner(100) selects a specific channel regarding set DMB signals inputted from the antenna, and filters the DMB signals. The decoding unit(202) performs a channel decoding operation regarding the DMB signals inputted from the tuner(100) and then audio and data decoding operation for the DMB signals. The determining unit(203) determines whether the portable device corresponds to an area channel stored at the storage unit(201) according to the decoded data inputted from the decoding unit(202), measures field intensity of a current area or adjacent areas when receipt sensitivity gets lower, receives signals of an area where the field intensity is high, broadcasts signals via the same channel as a current receipt channel in case that the area where the field intensity is high and broadcasts signals via a default channel stored at the storage unit(201) in case that there does not exist the same channel as the current receipt channel in the adjacent areas. The determining unit(203) measures the field intensity of the current area or the adjacent areas, maintains a current area and channel in case that there does not exist signals of the adjacent areas, and repeats measuring field intensity of the current area or the adjacent areas in case that the receipt sensitivity gets lower after a set time has passed. The selecting unit(204) selects the determined area channel among the channels stored at the storage unit(201). The outputting unit(300) displays the broadcast selected by the selecting unit(204).

Description

Portable telephone for receiving digital multimedia broadcasting and a method of receiving the same {Portable telephone for the receipt of DMB and method for the receipt}

1 is a view for explaining a general DMB system,

2 is a diagram illustrating a DMB system for receiving terrestrial DMB according to the present invention;

3 is a block diagram of a mobile device for receiving DMB for selecting a regional channel according to the present invention;

4 is a diagram showing a DMB broadcast channel protocol applied to the present invention;

5 is a flowchart illustrating an operation of receiving a DMB according to the present invention.

Explanation of symbols on the main parts of the drawings

100: tuner 200: control device

201: storage unit 202: decoding means

203: Determination unit 204: Selection unit

The present invention relates to a portable device for receiving a digital multimedia broadcasting (DMB) and a method of receiving the same, and more particularly, to a portable device for receiving a DMB and a method for receiving the broadcast regardless of the departure of the reception area. It is about.

DMB receiving portable device defined in the present invention is a terminal having a DMB reception function for receiving a DMB by embedding a device capable of receiving the DMB in a chip provided in a portable terminal, and allowing viewing using an LCD. It refers to a device that can receive DMB by carrying a TV, a dedicated terminal or a PDA, a mobile phone.

DMB is a mobile multimedia broadcasting that can enjoy high quality voice (radio) and video service (TV) while moving. Promoted for the digitalization of radio, speed of about 380kbps is possible, so it can provide video service. TV receivers can be installed in some conventional cars, but the noise is severe due to a poor radio reception rate, or the reception is interrupted. Currently, DMB is being promoted to compensate for this. The DMB currently being tested is able to watch high-definition broadcasts without interruption.

Conventional DMB can be divided into satellite DMB and terrestrial DMB as shown in FIG. Terrestrial DMB is to catch and watch radio waves emitted from a transmission station like a regular TV. Satellite DMB is a method of spreading radio waves throughout the country through satellite. Terrestrial DMB delivers various contents such as music, text, and video through portable terminals such as small TVs and PDAs due to its excellent mobile reception characteristics. Can create breakthrough demand.

Satellite DMB provides multimedia broadcasting services including audio and additional data or video to fixed, mobile, and portable receivers through satellite, and provides various quality audio broadcasting services at low cost and covers a large area by using satellites. This can dramatically expand the audible range of existing broadcasts.

The difference between terrestrial DMB and satellite DMB is the same as that of general TV broadcasting and satellite TV broadcasting. That is, terrestrial DMB can be viewed without paying a license fee, but satellite DMB has to pay a certain amount due to satellite fee. In addition, satellite DMB has dozens to hundreds of channels while terrestrial waves have a limited number of channels.

In other words, satellite broadcasting transmits a video and audio signal produced by a broadcasting station through a transmitting earth station and transmits a signal to a receiving earth station in a distant place using a satellite, which is a low-orbiting satellite, as a repeater. The signal is transmitted to the satellite and the transmitted signal is received by the satellite and downstream through the S-band of 2 GHz to 4 GHz. On the other hand, terrestrial broadcasting transmits video and audio signals produced by a broadcasting station to a repeater, and the transmitted video signals and the like are downstream through the L-band.

Recently, at home, people enjoy watching high-definition broadcasts on HD TV, and when they are on the go, that is, when they are driving a car or watching a broadcast on a PDA, they are being broadcast to watch DMB. These digital broadcast signals are received by mobile and fixed digital broadcast receivers so that a user can watch various videos.

However, in case of terrestrial DMB terminal, when the user leaves the receiving area, the user needs to change the receiving area due to the deterioration or incompetence of the reception. .

Disclosure of Invention An object of the present invention is to solve the problems as described above, and a mobile device for receiving a DMB and a method of receiving the same, which can receive a broadcast by selecting a region and a broadcast having the best reception sensitivity using regional channel information. To provide.

Another object of the present invention is to provide a mobile device for receiving DMB and a method of receiving the same, which automatically change an area superior to a current reception area to maintain a good reception state.

In order to achieve the above object, the DMB receiving portable apparatus according to the present invention is a DMB receiving portable apparatus for receiving a terrestrial DMB transmitted from a broadcasting center of a terrestrial DMB operator, the storage means for storing channel information for each region; An antenna for receiving a DMB signal; A tuner that tunes to a specific channel and performs filtering on a predetermined DMB signal input from the antenna; Decoding means for performing channel decoding on the DMB signal input from the tuner, and then performing audio decoding and data decoding; It is determined whether it corresponds to a channel of an area stored in the storage means according to the decoded data inputted from the decoding means, and when the reception sensitivity decreases, the electric field strength of the current or neighboring area is examined to receive a signal of an area having a high electric field strength. If the region with high intensity is an adjacent region, broadcasting is performed in the same channel as the currently received channel, and if the same channel as the currently receiving channel is not in the neighboring region, broadcasting is performed by default in the storage means. The electric field strength of the neighboring region is checked to maintain the current region and channel when there is no signal of the neighboring region, and the field strength of the current or neighboring region is repeated when the reception sensitivity is reduced even after a certain time elapses. Judging means; Selecting means for selecting a channel of the region determined by the determining means from a channel stored in the storing means; And an output unit for displaying the broadcast selected by the selecting means.

In the mobile device for receiving DMB according to the present invention, the channel information of the region selected by the selecting means is displayed on the output unit.

In the mobile device for receiving DMB according to the present invention, the broadcasting center of the terrestrial DMB operator loads the receiving and neighboring area codes in MPEG-4 BiFS (Binary Format for Scene) which is a data area of a video service at regular intervals. Characterized in that the transmission.

In order to achieve the above object, the DMB reception method according to the present invention is a DMB reception method for receiving a terrestrial DMB transmitted from a broadcasting center of a terrestrial DMB operator to a DMB reception portable device in a portable device for receiving a DMB. (B) storing region-specific frequency and channel information corresponding to a region code in a memory of a storage unit, (b) tuning a specific channel to a predetermined DMB signal input from an antenna and performing filtering to check reception and electric field strength (C) determining, by the determination unit, electric field strengths of current and neighboring areas according to frequency and channel information corresponding to the area codes stored in the memory; In step (e), if the channel of the region having high electric field strength is received in step (d), it is the same as the channel received in the set area and step (b). If the selector selects to broadcast through the channel, and if there is no same channel as the channel received in the step (b), the selector selects the selected channel as a channel stored by default in the memory and outputs the selected signal to the output unit (f) (c) If there is no signal of the adjacent region in the current region and the channel, and after a certain time elapses even if the reception sensitivity is characterized in that it comprises the step of proceeding to step (c).

In the DMB receiving method according to the present invention, the output unit may further include displaying information on the changed region and channel by text.

The above and other objects and novel features of the present invention will become more apparent from the description of the specification and the accompanying drawings.

EMBODIMENT OF THE INVENTION Hereinafter, the structure of this invention is demonstrated according to drawing.

First, the concept of a DMB system for receiving terrestrial DMB according to the present invention will be described with reference to FIG. 2.

2 is a diagram illustrating a DMB system for receiving terrestrial DMB according to the present invention.

As shown in FIG. 2, a user supplies power to a terminal to receive terrestrial DMB broadcasting and stores local information provided in the memory.

If the user's reception status is uneven while the user is on the move, the terminal selects the region and broadcast with the best reception sensitivity using the regional information provided by the operator and the region-specific channel information stored by the operator, and shows the broadcast. Display the reception area change history on the display in text.

Next, the configuration of the DMB receiving portable device used in the present invention in the DMB system shown in FIG. 2 will be described with reference to FIGS. 3 and 4.

3 is a block diagram of a mobile device for receiving DMB for selecting a channel for each region according to the present invention, and FIG. 4 is a diagram illustrating a DMB broadcasting channel protocol applied to the present invention.

In FIG. 3, the mobile device for receiving DMB according to the present invention tunes a specific channel to an antenna for receiving a terrestrial DMB transmitted from a broadcasting center of a terrestrial DMB operator and a predetermined DMB signal input from the antenna and performs filtering. It is input to the control device 200 via the tuner 100.

The control apparatus 200 performs channel decoding on the DMB signal input from the storage unit 201 and the tuner 100 having a memory device such as a conventional RAM or ROM to store channel information for each region, and then decodes the audio. A deciding unit 202 and a deciding unit 203 which determine whether or not it corresponds to a channel of an area stored in the storage unit 201 according to the decoding data inputted from the decoding means 202. And a selection unit 204 for selecting a channel of a region determined by the storage unit 201 in the storage unit 201, and is displayed on the LCD window of the output unit 300 to display a broadcast selected by the selection unit 204. do. 3, reference numeral 400 denotes an input unit including a keypad or an electronic pen for inputting or selecting necessary information.

That is, the DMB receiving portable device according to the present invention stores the region and channel information as a digital code in the storage unit 201 shown in FIG. The determination unit 203, which is a determination means, selects a channel of adjacent regions stored in the storage unit 201, which is a storage means, so that the electric field strength (receive sensitivity) is superior to the current reception area. Is selected so as to maintain a good reception state by the selection unit 204, which is a selection means.

In addition, the control apparatus 200 receives the reception of the other region by the determination unit 203 during the automatic search for the adjacent region due to the poor reception sensitivity in preparation for a temporary decrease in the reception sensitivity due to the shadow area or the overlapping area in the reception area. If no sensitivity is found, the current receive channel is maintained.

That is, in the broadcasting center of the terrestrial DMB operator according to the present invention, the reception and neighboring area codes are loaded and transmitted in MPEG-4 BiFS (Binary Format for Scene), which is a data area of a video service, at regular time intervals. If the reception state is uneven due to the decrease in reception sensitivity, the selection unit 204 receives a broadcast of the adjacent areas stored in the storage unit 201 of the mobile device for receiving DMB. By selecting and outputting the broadcast to the output unit 300, and shows the change in the reception area, the changed channel information on the LCD of the output unit 300 as a text.

 At this time, if there are a large number of adjacent areas, the determination unit 203 checks the reception sensitivity of the current area and all adjacent areas and selects the area having the best reception sensitivity.

In the determination unit 203, the area inspection time is made as short as possible, and if there is no signal, inspection is performed in units of 30 seconds.

The channel information is stored in the storage unit 201 in the storage area 201 to maintain the same channel even during automatic roaming (roaming), if there is no same channel automatically changes to the default stored channel (default).

Whether to set the automatic roaming system and regional channel information can be changed in the configuration program of the terminal.

That is, the information is transmitted in a manner of being included in MPEG-4 BiFS, which is a multimedia object transport protocol, in the local DMB transport protocol as shown in FIG. The transmission information is transmitted at regular intervals according to the table below to compare the channel information for each region stored in the storage unit 201 of the DMB receiving mobile device to have current reception area information and neighboring area information. In case of failure, automatic roaming is performed.

(Table 1) Roaming Information

Next, the operation of the configuration shown in Figs. 3 and 4 will be described with reference to Fig. 5.

5 is a flowchart illustrating an operation of receiving a DMB according to the present invention.

First, the determination unit 203 performs channel decoding on the DMB signal input from the tuner 100 which tunes a specific channel to the predetermined DMB signal input from the antenna and performs filtering, and then performs audio decoding and data decoding. The reception state and the electric field strength of the received signal decoded by the decoding means 202 for performing the operation are checked (S10).

If the reception is satisfactory in step S10, the received local station and the adjacent area code are stored in the storage unit 201 (S20), and the reception state is maintained (S30). The DMB receiving portable device according to the present invention stores and sells frequency and channel information for each region in the memory of the storage unit 201 at the time of sale.

If the reception is not good in step S10, the determination unit 203 determines whether or not roaming is set (S40). When roaming is set in step S40, the electric field strength of the current and neighboring areas is checked (inspected) according to the frequency and channel information corresponding to the area code (S50).

If the roaming setting is not performed in step S40, the current area received by the mobile device for receiving DMB is maintained (S60).

If there is a signal by checking the electric field strength in step S50, the determination unit 203 receives the channel of the region having a high electric field strength (S70). On the other hand, if there is no signal by checking the electric field strength in step S50, and maintains the local station and the channel and proceeds to step 40 after about 30 seconds to repeat the above process (S80).

In step S70, when the channel of the region having high electric field strength is received, the selection unit 204 selects to broadcast in the set region and channel, outputs the selected signal to the output unit 300, and at the same time, information about the changed region and channel. Also output to the output unit 300 so that the user recognizes the changed region and channel (S90).

In addition, the changed region and channel information may be configured to be automatically stored in the storage unit 201 for automatic roaming later.

As mentioned above, although the invention made by this inventor was demonstrated concretely according to the said Example, this invention is not limited to the said Example and can be variously changed in the range which does not deviate from the summary.

That is, in the above embodiment, the embodiment of the terrestrial DMB transmitted by the broadcasting center of the terrestrial DMB service provider has been described. However, the present invention is not limited thereto, and the present invention may be applied to the DMB transmitted by the broadcasting center of the satellite DMB service provider. to be.

As described above, according to the portable device for receiving a DMB and the method for receiving the same according to the present invention, an effect of always being able to receive DMB satisfactorily can be obtained even if the receiving area is separated.

Claims (5)

DMB reception portable device that receives terrestrial DMB transmitted from broadcasting center of terrestrial DMB service provider, Storage means for storing regional channel information; An antenna for receiving a DMB signal; A tuner that tunes to a specific channel and performs filtering on a predetermined DMB signal input from the antenna; Decoding means for performing channel decoding on the DMB signal input from the tuner, and then performing audio decoding and data decoding; It is determined whether it corresponds to a channel of an area stored in the storage means according to the decoded data inputted from the decoding means, and when the reception sensitivity decreases, the electric field strength of the current or neighboring area is examined to receive a signal of an area having a high electric field strength. If the area with high intensity is an adjacent area, broadcasting is performed on the same channel as the currently received channel, and if the same channel as the currently receiving channel is not in an adjacent area, broadcasting is performed by default on the storage means. Checking the electric field strength of the current or neighboring area to maintain the current area and channel when there is no signal in the adjacent area, and checking the electric field strength of the current or neighboring area when the reception sensitivity decreases even after a certain time elapses; Determining means for repeating from; Selecting means for selecting a channel of the region determined by the determining means from a channel stored in the storing means; And And an output unit for displaying the broadcast selected by the selection means. The method of claim 1, And the channel information of the region selected by the selection means is displayed on the output unit. The method of claim 1, The broadcasting center of the terrestrial DMB operator is a mobile device for receiving DMB, characterized in that the transmission and reception of the adjacent area code to the MPEG-4 BiFS, which is the data area of the VIDEO Service at regular intervals. A DMB reception method for receiving a terrestrial DMB transmitted from a broadcasting center of a terrestrial DMB operator with a mobile device for receiving DMB. (a) storing regional frequency and channel information corresponding to a region code in a memory of the storage unit; (b) checking a reception state and an electric field strength by tuning a specific channel to a predetermined DMB signal input from an antenna and performing filtering; (c) determining, by the determination unit, electric field strengths of current and adjacent regions according to frequency and channel information corresponding to region codes stored in the memory; (d) receiving a channel in a region of high field strength in the current or adjacent region, (e) When receiving the channel of the region having high electric field strength in step (d), the selector selects to broadcast in the same channel as the channel received in the set area and step (b), and the channel received in step (b) If there is no identical channel, the selector is selected as a channel stored by default in the memory and the selected signal is output to the output unit. (f) a step of maintaining the current region and channel if there is no signal in the adjacent region in step (c), and proceeding to step (c) if the reception sensitivity is reduced even after a certain time elapses. Receiving method. The method of claim 4, wherein The output unit further comprises the step of displaying the information on the changed region and channel by text.

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