KR20100035534A - Method for automatically selecting channel in a broadcasting receiver - Google Patents

Method for automatically selecting channel in a broadcasting receiver Download PDF

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Publication number
KR20100035534A
KR20100035534A KR1020080094967A KR20080094967A KR20100035534A KR 20100035534 A KR20100035534 A KR 20100035534A KR 1020080094967 A KR1020080094967 A KR 1020080094967A KR 20080094967 A KR20080094967 A KR 20080094967A KR 20100035534 A KR20100035534 A KR 20100035534A
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KR
South Korea
Prior art keywords
channel
broadcast
pip
tuner
tuning
Prior art date
Application number
KR1020080094967A
Other languages
Korean (ko)
Inventor
조필기
Original Assignee
주식회사 대우일렉트로닉스
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 대우일렉트로닉스 filed Critical 주식회사 대우일렉트로닉스
Priority to KR1020080094967A priority Critical patent/KR20100035534A/en
Publication of KR20100035534A publication Critical patent/KR20100035534A/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/426—Internal components of the client ; Characteristics thereof
    • H04N21/42607—Internal components of the client ; Characteristics thereof for processing the incoming bitstream
    • H04N21/4263—Internal components of the client ; Characteristics thereof for processing the incoming bitstream involving specific tuning arrangements, e.g. two tuners
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/445—Receiver circuitry for the reception of television signals according to analogue transmission standards for displaying additional information
    • H04N5/45—Picture in picture, e.g. displaying simultaneously another television channel in a region of the screen
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/50—Tuning indicators; Automatic tuning control

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

The present invention is an automatic channel tuning method of a broadcast receiving apparatus supporting at least two or more picture in picture (PIP) modes by using a tuner. When receiving and playing, automatic channel tuning is performed for each broadcasting channel using a different tuner to store channels for which synchronization signals are detected, and the PIP is not completed for all the broadcasting channels. It is to stop the automatic channel tuning operation on demand and to update the pre-stored channel map data using the channels stored in the memory, and to provide the PIP service based on the updated channel map data.

As described above, the present invention searches for a channel with a synchronization signal in an automatic channel tuning mode by using a tuner for supporting a PIP mode when watching a broadcast in a general broadcast mode, and updates previously stored channel map data by using the same. May update the channel map data without additional manipulation, thereby enhancing user convenience.

PIP, Channel, Tuning

Description

Automatic channel tuning method of broadcast receiving device {METHOD FOR AUTOMATICALLY SELECTING CHANNEL IN A BROADCASTING RECEIVER}

The present invention relates to a channel tuning method, and more particularly, to search for a channel having a synchronization signal in an automatic channel tuning mode by using a tuner for supporting a PIP mode when watching a broadcast in a general broadcasting mode, and then using the pre-stored channel. The present invention relates to an automatic channel tuning method of a broadcast receiving apparatus capable of updating channel map data.

In general, a TV receives a high frequency signal transmitted from a broadcasting station through an antenna and displays it on a screen. The color light of a subject sent to an image pickup tube is divided into an RGB signal, and is again made into a YIG signal in a matrix circuit.

In order to be easily separated from the YIG signal, the I and Q signals pass through a balanced modulator, respectively, to be different in phase, and then transmitted by mixing color burst signals, horizontal / vertical sync signals, and voice signals. do.

The transmitted composite video signal is received through an antenna, and amplified through a high frequency amplification step to increase sensitivity and selectivity, and improve the S / N ratio. In addition, YIQ signals are obtained through a series of processes, such as an image detection step and a band amplification step. The YIQ signals are synthesized at a constant rate, reproduced in an RGB signal, and sent to the CRT for display.

On the other hand, PIP (Picture In Picture) TV, which shows a broadcast screen of all channels as a sub screen in recent years, is being introduced.

PIP TV has a function of displaying multiple screens by PIP processing when a viewer selects a multi-screen mode using a screen selection button of a button while watching a broadcast program of a TV. When watching, if an operation such as changing a broadcast channel using a remote controller is performed, the TV displays an Arabic numeral-type OSD screen displaying the changed channel.

When a viewer wants to watch a broadcast program of another station while watching a regular broadcast, a cable broadcast, or a cable TV broadcast through a general PIP TV, the channel can be tuned or received by using the channel up / down buttons. Use the Auto Channel Tuning feature to memorize the channel and use the channel up / down buttons to tune the channel.

The channel setting method using the automatic channel tuning function receives an RF signal transmitted from a broadcasting station as a tuner, tunes only a channel with a signal, stores the tuned channel in memory, and stores it in memory when a user wants to select a channel. Extract the specified channel data.

Subsequently, when the broadcasting station changes the channel band and channel information, the user resets the channel data again using the automatic channel tuning function.

According to the conventional channel tuning method, when a channel band and channel information are changed in a broadcasting station, a user needs to execute an automatic channel tuning function to reset a channel. In particular, with the recent increase in the number of channels, the channel reset time takes longer even when using the differential channel tuning function, and the user often needs to reset the channel frequently because the channel is frequently changed from the signal channel state to the no signal channel state. .

The present invention can search for a channel with a synchronization signal in the automatic channel tuning mode by using a tuner for supporting the PIP mode when watching a broadcast in the general broadcast mode, and then update the pre-stored channel map data.

The automatic channel tuning method of the broadcast receiving apparatus according to the present invention is an automatic channel tuning method of a broadcast receiving apparatus supporting at least two or more picture in picture (PIP) modes using a tuner. When receiving and reproducing a broadcast program using any one of the tuners, performing automatic channel tuning with or without a synchronization signal for each broadcasting channel using another tuner, and storing the broadcasting channels from which the synchronization signal is detected; Stopping the automatic channel tuning operation when there is a PIP request when the channel tuning for all the broadcasting channels is not completed; updating the previously stored channel map data by using the stored broadcasting channels; Providing the PIP service based on the updated channel map data.

The present invention searches for a channel with a synchronization signal in an automatic channel tuning mode by using a tuner for supporting a PIP mode when watching a broadcast in a general broadcast mode, and updates previously stored channel map data by using the same. The channel map data can be updated without any manipulation to enhance user convenience.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

According to an embodiment of the present invention, an automatic channel for searching for a channel having a synchronization signal in an automatic channel tuning mode by using a tuner for supporting a PIP mode when watching a broadcast in a general broadcast mode and then using the automatic channel for updating previously stored channel map data The tuning method will be described.

1 is a block diagram of a broadcast receiving apparatus for explaining an automatic channel tuning method according to an embodiment of the present invention.

Referring to FIG. 1, the broadcast receiving apparatus includes an antenna 112, first and second tuner units 114 and 116, a video decoder 130, a controller 140, a key input unit 142, a memory 150, and an OSD. The generator 160, the mixer 170, and the display 180 are included.

The first and second tuners 114 and 116 tune the high frequency signals received from the antenna 112 according to the tuning control signal of the controller 140. In this case, the first tuner 114 is used for viewing the main screen, and the second tuner 116 is commonly used for automatic channel selection of the PIP screen.

The video decoder 130 detects the video signal from the broadcast signal tuned from the first and second tuners 114 and 116.

The control unit 140 performs channel search by applying the channel map data drawn from the memory 150 to the first and second tuner units 114 and 116, and the broadcast program received by the first tuner unit 114 The tuning control signal is applied to the second tuner unit 116 while being displayed. In particular, the controller 140 stores broadcast channels in which a video signal, that is, a synchronous signal, is detected from the second tuner 116 in a predetermined area of the memory 150, and the second tuner 116 automatically performs the channel setting operation. If the user operates the key input unit 142 to request the PIP mode, the user stops the automatic channel tuning operation by applying a tuning stop signal to the second tuner unit 116 and stores a channel stored in a predetermined region of the memory 150. The channel map data stored in the memory 150 is updated by using the above.

Meanwhile, the controller 140 performs channel search by applying the updated channel map data to the first and second tuner units 114 and 116 in the PIP mode, and when the automatic channel tuning operation is completed, the second tuner unit 116. ) And the channel map data are updated using the channels stored in the predetermined region of the memory 150 according to the automatic channel tuning operation.

The memory 150 stores the channel searched by the second tuner 116 according to the tuning control signal applied from the controller 140. At this time, the memory 150 preferably uses EEPROM (Electrically Erasable Programmable Read Only Memory).

The OSD generator 160 generates OSD pattern data corresponding to the channel setting menu and channel information generated by the controller 140.

The mixing unit 170 mixes the OSD pattern data generated by the OSD generator 160 with the video signal decoded by the video decoder 130.

The display unit 180 displays the video signal and the OSD pattern data generated by the mixing unit 170.

The key input unit 142 provides a user interface for controlling the overall operation of the broadcast receiving device such as a PIP mode request, a channel change being displayed on the screen, and the like.

A process of automatically setting a channel by the broadcast receiving device having the above configuration will be described with reference to FIG. 2.

2 is a flowchart illustrating an automatic channel tuning process of a broadcast reception device according to an embodiment of the present invention.

Referring to FIG. 2, in the normal broadcast play mode, the controller 140 applies channel map data to the first tuner 114 to perform channel searching, and the user selects a channel selected through manipulation of the key input unit 142. After receiving the broadcast by using the first tuner 114, the decoder decodes the video through the video decoder 130 and outputs the broadcast to the display 180, at step S200.

When the control unit 140 applies the tuning control signal to the second tuner unit 116 in the normal broadcast reproduction mode, the second tuner unit 116 sequentially processes the broadcast channels in the automatic channel tuning mode, that is, from the lowest channel. Tuning is performed sequentially (S202). Accordingly, the controller 140 stores the channels in which the synchronization signal is detected from the second tuner 116 that sequentially tunes the broadcast channels in a predetermined region of the memory 150 (S204).

In addition, the controller 140 determines whether automatic channel tuning is completed, that is, whether a synchronization signal is detected for all broadcast channels, and determines whether channel tuning is completed accordingly (S206).

As a result of the determination in S206, when the automatic channel tuning operation is not completed, the controller 140 determines whether the user has a PIP mode request through the operation of the key input unit 142 (S208).

As a result of the determination of S208, when there is a PIP mode request, the control unit 140 applies a tuning stop signal to the second tuner unit 116 to stop the automatic channel tuning operation (S210) and the predetermined region of the memory 150. The channel map data is updated (S212) using the channels stored in the controller, and the updated channel map data is applied to the first and second tuner units 114 and 116. Accordingly, the first and second tuners 114 and 116 receive the broadcast program of the channel selected by the user and display the program in the PIP mode through the video decoder 130, the mixing unit 170, and the display unit 180 ( S214). That is, the broadcast program received by the first tuner unit 114 is displayed on the main screen, and the broadcast program received by the second tuner unit 116 is displayed on the sub-screen.

In addition, the controller 14 determines whether there is a PIP mode stop request by operating the user key input unit 142 (S216).

As a result of the determination of S216, if there is a PIP mode stop request, the process proceeds to S202 to perform a subsequent step, that is, the control unit 140 applies a tuning control signal to the second tuner unit 116 to stop the channel selection. The channel is sequentially tuned to detect the presence of a synchronization signal, and the channel in which the synchronization signal is detected is stored in the memory 150.

If it is determined in S216 that there is no PIP mode stop request, the process proceeds to S214 and continues to provide a broadcast in the PIP mode.

On the other hand, when it is determined in S206 that the automatic channel tuning is completed, the control unit 140 applies the tuning stop signal to the second tuner unit 116 to stop the automatic channel tuning operation and also stores the channels stored in the memory 150. The pre-stored channel map data is updated using the operation S218.

If there is no PIP mode request as a result of the determination in S208, the flow advances to S202 to continue automatic channel tuning operation.

In the embodiment of the present invention, a broadcast receiving apparatus having two tuners has been described as an example, but the present invention is also applicable to a broadcast receiving apparatus supporting a PIP mode, that is, a broadcast receiving apparatus having two or more tuners.

According to an embodiment of the present invention, by searching for a channel having a synchronization signal in the automatic channel tuning mode by using a tuner for supporting the PIP mode when watching a broadcast in a general broadcast mode, and updating the previously stored channel map data using the same. The user can update the channel map data without any manipulation.

The present invention has been limited to the embodiments of the present invention, but it is obvious that the technology of the present invention can be easily modified by those skilled in the art. Such modified embodiments should be included in the technical spirit described in the claims of the present invention.

1 is a block diagram of a broadcast receiving apparatus for explaining an automatic channel tuning method according to an embodiment of the present invention.

2 is a flowchart illustrating an automatic channel tuning process by a broadcast receiving device according to an embodiment of the present invention.

Description of the Related Art

112 antenna 114 first tuner section

116: second tuner unit 130: video decoder

140: control unit 142: key input unit

150: memory 160: OSD generator

170: mixing unit 180: display unit

Claims (3)

As an automatic channel tuning method of a broadcast receiving apparatus supporting at least two or more picture in picture (PIP) modes using a tuner, When receiving and playing back a broadcast program using one tuner, performing automatic channel tuning using a different tuner with or without synchronization signal detection for each broadcast channel; Storing broadcast channels from which the synchronization signal is detected; Stopping the automatic channel tuning operation when the PIP request is made while the channel tuning for all the broadcasting channels is not completed; Updating previously stored channel map data by using the stored broadcast channels and providing the PIP service based on the updated channel map data. Automatic channel tuning method of a broadcast receiving device comprising a. The method of claim 1, The automatic channel tuning method, If there is no PIP mode request until the automatic channel tuning for all broadcast channels is completed, stopping the operation of the other tuner and updating the channel map using the stored broadcast channels; Automatic channel tuning method of a broadcast receiving device comprising a. The method of claim 1, The automatic channel tuning method, And when the PIP termination request is made, performing automatic channel tuning from the broadcast channel where the automatic channel tuning is stopped by driving the other tuner and storing the automatic channel tuning in the memory.
KR1020080094967A 2008-09-26 2008-09-26 Method for automatically selecting channel in a broadcasting receiver KR20100035534A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020080094967A KR20100035534A (en) 2008-09-26 2008-09-26 Method for automatically selecting channel in a broadcasting receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020080094967A KR20100035534A (en) 2008-09-26 2008-09-26 Method for automatically selecting channel in a broadcasting receiver

Publications (1)

Publication Number Publication Date
KR20100035534A true KR20100035534A (en) 2010-04-05

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Application Number Title Priority Date Filing Date
KR1020080094967A KR20100035534A (en) 2008-09-26 2008-09-26 Method for automatically selecting channel in a broadcasting receiver

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