KR101208501B1 - Method and Digital Broadcasting Terminal for Automatically Changing Channel for Broadcasting - Google Patents

Abstract

The present invention relates to a method for automatically changing a broadcast channel and a terminal for digital broadcasting.

The present invention includes the steps of (a) receiving a broadcast frame; (b) extracting a transmitter identifier from the broadcast frame; (c) comparing the transmitter identifier extracted in step (b) with a previous transmitter identifier; And (d) changing the broadcast channel to a corresponding channel of the broadcast channel list corresponding to the transmitter identifier extracted in the step (b) when the transmitter identifier does not match. Characterized in that.

As described above, according to the present invention, even if the broadcast transmitter or repeater transmitting the broadcast frame is changed, the present invention provides an effect of continuing to receive the previously provided broadcast without searching for a broadcast channel or changing the broadcast channel.

Digital broadcast, channel, transmitter identifier

Description

Method and Digital Broadcasting Terminal for Automatically Changing Channel for Broadcasting}

1 is a schematic diagram showing a change of a service area of a mobile multimedia broadcasting service;

2 is a frame structure diagram showing a structure of a broadcast frame including a transmitter identifier according to a preferred embodiment of the present invention;

3 is a block diagram schematically showing an internal configuration of a digital broadcasting terminal for automatically changing a broadcast channel according to an embodiment of the present invention;

4 is a flowchart schematically illustrating a process of automatically changing a broadcast channel according to a preferred embodiment of the present invention.

Description of the Related Art

302: memory 304: key input unit

306: control unit 308: display unit

310: wireless circuit unit 312: digital broadcast receiving unit

 The present invention relates to a method for automatically changing a broadcast channel and a terminal for digital broadcasting. More specifically, a method of automatically changing a broadcast channel to a channel corresponding to a transmitter identifier of a broadcast transmitter or repeater that can be serviced when the transmitter identifier is changed by changing the transmitter identifier so as to be identified for each broadcast transmitter or repeater and digitally. It relates to a broadcast terminal.

Recently, due to the rapid development of communication and broadcasting technologies and the convergence of the communication and broadcasting fields, a service for conveniently watching digital broadcasting on the go has been provided. Based on the digital broadcasting technology, the newly emerged mobile multimedia broadcasting service is a multimedia mobile broadcasting service of audio, video, and data capable of receiving CD-quality high quality radio, TV video, and text broadcasting anytime, anywhere.

Mobile multimedia broadcasting service currently being used in digital broadcasting is divided into terrestrial digital multimedia broadcasting (TDMB) service and satellite digital multimedia broadcasting (SDMB) service according to transmission method and network configuration. However, the mobile multimedia broadcasting service has been changed worldwide, such as DAB (Digital Audio Broadcasting), IBOC (In-Band On-Channel), ISDB-T, DVB-T, DVB-H, etc. Or in preparation for implementation.

Among them, the terrestrial mobile multimedia broadcasting service is a service that transmits and receives broadcast radio waves using a transmitter or repeater installed on the ground, and provides high quality voice, text and video services anytime, anywhere, and based on excellent mobile reception characteristics, It is a service that can deliver various contents such as texts and videos through portable and fixed terminals such as small TVs, PDAs, and mobile phones.

However, in the case of a digital broadcasting service having a narrow service area (coverage), such as a terrestrial mobile multimedia broadcasting service, since local broadcasting stations have no choice but to provide broadcasting services, channels may be different for each region even in the same broadcasting station.

Referring to FIG. 1, which is a schematic diagram illustrating a change of a service area of a mobile multimedia broadcasting service, is as follows.

For example, a service area capable of transmitting a broadcast by the broadcast transmitter A and a service area capable of transmitting a broadcast by the broadcast transmitter B have a different radius, and the broadcast service is performed by the broadcast transmitter B and the channel serving the broadcast by the broadcast transmitter A. The channels served are different. Therefore, when the user watches the broadcast on the terminal and moves from the service area of the broadcast transmitter A to the service area of the broadcast transmitter B, the broadcast channel is changed so that the user cannot maintain the broadcast unless the channel is changed.

That is, when a user receives a digital broadcasting service and moves to an area where a channel is changed while watching a broadcast, the broadcasting channel is changed and the broadcasting service is interrupted. There is a problem of changing to a corresponding broadcast channel by searching for a separate channel.

In order to solve this problem, an object of the present invention is to provide a broadcast channel with a channel corresponding to a transmitter identifier of a broadcast transmitter or repeater that can be serviced when the transmitter identifier is changed by changing the transmitter identifier so that it can be identified for each broadcast transmitter or repeater. To provide a way to automate this.

In addition, an object of the present invention is to digitally change the broadcast channel to a channel corresponding to the transmitter identifier of the broadcast transmitter or repeater that can be serviced when the transmitter identifier is changed by changing the transmitter identifier so as to be identified for each broadcast transmitter or repeater. The present invention provides a broadcasting terminal.

In order to achieve this object, the present invention comprises the steps of (a) receiving a broadcast frame; (b) extracting a transmitter identifier from the broadcast frame; (c) comparing the transmitter identifier extracted in step (b) with a previous transmitter identifier; And (d) changing the broadcast channel to a corresponding channel of the broadcast channel list corresponding to the transmitter identifier extracted in the step (b) when the transmitter identifier does not match. It is characterized by.

In addition, the present invention provides a digital broadcasting terminal, comprising: a digital broadcasting receiver for receiving a broadcast frame and transmitting the same to a controller; A memory for storing a transmitter identifier and a broadcast channel list corresponding to the transmitter identifier; And receiving the broadcast frame from the digital broadcast receiver, extracting a transmitter identifier from the broadcast frame, comparing the extracted transmitter identifier with a previous transmitter identifier, and comparing the extracted transmitter identifier with a corresponding channel in the broadcast channel list corresponding to the extracted transmitter identifier. The present invention has a feature of providing a digital broadcasting terminal for automatically changing a broadcast channel, comprising a control unit for changing a broadcast channel.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to designate the same or similar components throughout the drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

2 is a frame structure diagram illustrating a structure of a broadcast frame including a transmitter identifier according to a preferred embodiment of the present invention.

As shown in FIG. 2, the transmitter identifier may be stored in a null symbol that is part of a sync channel of a broadcast frame transmitted from a broadcast transmitter or a repeater. Alternatively, a phase shift value stored in a phase reference symbol that is part of a synchronization channel of a broadcast frame may be stored differently according to each broadcast transmitter or repeater. When extracted and analyzed, an identifier for identifying which broadcast transmitter or repeater is defined as a transmitter identifier. The term having the above meaning is not limited to the transmitter identifier. Here, the transmitter refers to a subject transmitting a broadcast frame (or broadcast signal) and is not limited to the broadcast transmitter or the repeater.

3 is a block diagram schematically illustrating an internal configuration of a digital broadcasting terminal for automatically changing a broadcasting channel according to an exemplary embodiment of the present invention.

As shown in FIG. 3, the terminal includes a memory 302, a key input unit 304, a controller 306, a display unit 308, a wireless circuit unit 310, a digital broadcast receiver 312, and the like.

The memory 302 stores a predetermined program for controlling the overall operation of the terminal, and stores data input and output when the overall operation of the terminal is performed by the controller 306 in a predetermined area.

In the memory 302 according to the preferred embodiment of the present invention, the transmitter identifier and the broadcast channel lists corresponding to the transmitter identifier are stored so that the transmitter identifier or the broadcast channel list is provided to the controller at the request of the controller. In addition, the memory 302 may store a transmitter identifier and a broadcast channel list of a broadcast transmitter or repeater transmitting the current broadcast as current broadcast information.

For example, the transmitter identifier of the broadcast transmitter A is called transmitter A, and the corresponding broadcast channel list is SBS broadcast 10a, KBS broadcast 10b, MBC broadcast 10c, and the transmitter identifier B of the broadcast transmitter B is transmitter B. The channel information corresponding to the SBS broadcast 11a, the KBS broadcast 11b, and the MBC broadcast 11c as the broadcast channel list corresponding thereto may be stored in the memory in the form of a matching table between the transmitter and the broadcast channel list.

The key input unit 304 has a plurality of key buttons for inputting a number such as a phone number, and the user selects a desired channel and generates corresponding key data when the predetermined key is pressed and outputs it to the control unit 306. do. In addition, the key input unit 304 may be configured as a keypad, a jog shuttle, a point stick or a touch screen.

The display unit 308 includes a liquid crystal display unit for displaying a variety of information, and is a part for informing the user by displaying the current state of the terminal to control the user appropriately. The liquid crystal display displays various types of information such as power supply status, radio wave reception strength, date and time, current mode status, and other user information. The display unit 308 according to an exemplary embodiment of the present invention may display a broadcast program received from a broadcast transmitter.

The radio circuit unit 310 is a circuit for transmitting and receiving voice and control information with a base station wirelessly. A signal transmitted from an external terminal or a base station is received through an antenna and transmitted to the controller 306, or data stored in the memory 302 is output through the antenna.

The digital broadcast receiver 312 receives a broadcast frame transmitted by the broadcast transmitter or the repeater and transmits it to the controller 306.

The controller 306 is the most essential part of the terminal and controls the overall operation of the terminal. The controller 306 includes an arithmetic logic operator, a register, a program counter, a command decoder, a control circuit, and all operations of the terminal are properly performed. To control.

The controller 306 according to an exemplary embodiment of the present invention may extract a transmitter identifier stored in a null symbol included in a broadcast frame received from the digital broadcast receiver 312. In addition, the transmitter identifier may be extracted using a phase shift value included in a phase reference symbol of a synchronization channel of the broadcast frame received from the digital broadcast receiver 312.

In addition, the controller 306 compares the extracted transmitter identifier and the previous transmitter identifier as described above, and if there is a mismatch, calls the broadcast channel list corresponding to the extracted transmitter identifier among the broadcast channel lists stored in the memory and lists the channels listed in the list. The broadcast channel may be changed to a channel corresponding to a broadcast channel previously broadcast. Here, the previous transmitter identifier refers to a transmitter identifier of a broadcast transmitter or repeater that has transmitted a broadcast frame before leaving the service area. For example, when the mobile station receives the SBS broadcast from the broadcast transmitter A and moves while entering the service area of the broadcast transmitter B while moving out of the service area of the broadcast transmitter A, the previous transmitter identifier is transmitter A which is the identifier of the broadcast transmitter A. The extracted transmitter identifier will be transmitter B which is an identifier of the broadcast transmitter B. In addition, changing the channel here may mean the same as changing the broadcast frequency band used for transmitting the broadcast in the broadcast transmitter or repeater.

In this case, the controller 306 compares the broadcast channel list called from the memory with the broadcast channel list previously broadcast, and changes the broadcast channel if it does not match, and maintains the previous broadcast channel if the broadcast channel list matches. It may be. In addition, the controller 306 may store the transmitter identifier and the broadcast channel list extracted before the broadcast channel is changed in the memory as current broadcast information.

4 is a flowchart schematically illustrating a process of automatically changing a broadcast channel according to a preferred embodiment of the present invention.

While receiving and watching a broadcast, a new broadcast frame is received while moving (S402). For example, if a user moves out of the broadcast transmitter A's service area and moves to the broadcast transmitter B's service area, the broadcast frame is transmitted by the broadcast transmitter B.

When the broadcast frame is received, the transmitter identifier is extracted from the broadcast frame (S404). For example, in the case of a broadcast frame transmitted from the broadcast transmitter B, the transmitter identifier may be determined as the transmitter B and extracted. Here, the transmitter identifier may extract a transmitter identifier stored in a null symbol of a broadcast frame, or may extract a transmitter identifier by analyzing a phase shift value included in a phase reference symbol of a synchronization channel.

The transmitter identifier extracted in step S404 and the transmitter identifier previously broadcasted are compared with each other (S406). For example, if the user was previously in the service area of broadcast transmitter A, the transmitter identifier of the previous broadcast transmitter is transmitter A, and if the current moving near area is the service area of broadcast transmitter B, the extracted transmitter identifier would be transmitter B.

If it is determined in step S406 that the transmitter identifiers do not match, the broadcast channel list corresponding to the extracted transmitter identifier is called from the memory (S408). For example, as described above, when the transmitter identifier of the previous broadcast transmitter is transmitter A and the transmitter identifier of the current broadcast transmitter is transmitter B, since the transmitter identifiers do not match, the broadcast channel corresponding to transmitter B stored in the memory A list (a list of SBS broadcasts 11a, KBS broadcasts 11b and MBC broadcasts 11c) is called.

The called broadcast channel list is compared with the broadcast channel list corresponding to the transmitter identifier of the broadcast transmitter transmitting the previous broadcast frame (S410). For example, the broadcast channel list corresponding to the called transmitter B (list of SBS broadcast 11a, KBS broadcast 11b, MBC broadcast 11c) and the broadcast channel list corresponding to transmitter A which is the transmitter identifier of the previous broadcast transmitter A (A list in which SBS broadcast is 10a, KBS broadcast 10b and MBC broadcast is set to 10c) can be compared.

If it is determined in step S412 that the broadcast channel list does not match, the broadcast channel list called in step S408 and the transmitter identifier extracted in step S404 are stored in the memory as current broadcast information (S412). For example, a broadcast channel list corresponding to the transmitter B and the transmitter B (a list of SBS broadcast 11a, KBS broadcast 11b and MBC broadcast 11c) is stored as current broadcast information.

Subsequently, the broadcast channel is changed from the called broadcast channel list to a channel corresponding to the broadcast channel that the user is watching (S414). For example, if the user was watching the SBS broadcast, the broadcast channel is changed from 10a to 11a so that the user can watch the broadcast content as it is if the broadcast content being served is the same. However, if the broadcast content being serviced is different, the broadcast transmitter B may be changed to the broadcast content being serviced. If the broadcast channel list matches or the corresponding channel matches the previous channel, the previous channel may be maintained without changing the channel separately.

The subject transmitting the broadcast frame may be a relay as well as a broadcast transmitter. In addition, the content transmitted in the broadcast frame may be a variety of content, such as music, text, video. In addition, the broadcast service according to the present invention is not only terrestrial digital multimedia broadcasting (TDMB) service but also digital audio broadcasting (DAB), in-band on-channel (IBC), ISDB-T, DVB-T, and DVB-H. May include services.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

As described above, according to the present invention, even if the broadcast transmitter or repeater transmitting the broadcast frame is changed, the present invention provides an effect of continuing to receive the previously provided broadcast without searching for a broadcast channel or changing the broadcast channel.

Claims (13)

Receiving a broadcast frame; Extracting a transmitter identifier from the broadcast frame using a phase shift value included in a phase reference symbol of a sync channel of the received broadcast frame; Comparing the extracted transmitter identifier with a previous transmitter identifier; And If the extracted transmitter identifier does not match the previous transmitter identifier, changing the broadcast channel to a corresponding channel in the broadcast channel list corresponding to the extracted transmitter identifier; How to. The method of claim 1, wherein the extracting step, And extracting the transmitter identifier included in a null symbol in the broadcast frame using the phase shift value. delete The method of claim 1, wherein the changing the broadcast channel, Calling a broadcast channel list corresponding to the extracted transmitter identifier from a memory; Comparing the called broadcast channel list with a previous broadcast channel list; And If the called broadcast channel list does not match the previous broadcast channel list, changing a broadcast channel to a corresponding channel of the called broadcast channel list. 5. The method of claim 4, Before changing the broadcast channel, storing the extracted transmitter identifier and the broadcast channel list corresponding to the extracted transmitter identifier as current broadcast information in a memory. The method of claim 1, The transmitter identifier is a method for automatically changing a broadcast channel, characterized in that the identifier of the broadcast transmitter or repeater transmitting the broadcast frame. A digital broadcast receiver for receiving a broadcast frame; A memory storing a transmitter identifier and a broadcast channel list corresponding to the transmitter identifier; And Extracts a transmitter identifier from the broadcast frame by using a phase shift value included in a phase reference symbol of a sync channel of the received broadcast frame, and extracts the transmitter identifier and the previous transmitter identifier If does not match, the control unit for changing the broadcast channel to a corresponding channel of the broadcast channel list corresponding to the extracted transmitter identifier; Digital broadcasting terminal for automatically changing the broadcast channel comprising a. The method of claim 7, wherein And the control unit extracts the transmitter identifier included in a null symbol in the broadcast frame using the phase shift value. delete The method of claim 7, wherein If the extracted transmitter identifier and the previous transmitter identifier do not coincide, the controller calls the broadcast channel list corresponding to the extracted transmitter identifier from the memory. . 11. The method of claim 10, If the broadcast channel list corresponding to the extracted transmitter identifier and the broadcast channel list corresponding to the previous transmitter identifier do not match, the controller changes the broadcast channel. terminal. The method of claim 7, wherein And the controller is configured to automatically change a broadcast channel, wherein the broadcast channel list corresponding to the extracted transmitter identifier and the extracted transmitter identifier is stored as current broadcast information in the memory. The method of claim 7, wherein And the transmitter identifier is an identifier of a broadcast transmitter or an identifier of a repeater.

Images