KR100298400B1 - How to display channel of digital TV - Google Patents

Abstract

The present invention relates to a method of displaying a channel of a digital TV that enables a user to easily select a channel, in which an analog / digital TV having a multi-picture function receives digital terrestrial waves and decodes and stores channel information selected by the user A step of performing multi-picture processing on the minor channels of the channel selected by the user and displaying the multi-picture on the screen, and displaying the channel selected by the user among the minor channels displayed in the multi-picture on the screen, It is possible to maximize user satisfaction and reliability by eliminating the inconvenience of selecting a channel.

Description

How to display channel of digital TV

The present invention relates to a television, and more particularly, to a channel display method of a digital TV.

The analogue receiver starts from a small model such as 14 inch, and is now showing it to consumers in various forms ranging from projection TV up to 60 inches.

However, current analog TVs are becoming larger and more sophisticated. First, in view of image quality, the quality of the current analog broadcast quality such as NTSC, PAL, or SECAM is deteriorated when viewed on a large TV. Experience.

Second, in terms of the limitation of broadcasting channels that can be provided in the future, current TV broadcasting channels are limited to about 80 combined with microwave and microwave channel bands. In the case of terrestrial waves, Only.

Third, there are limitations as unidirectional media.

That is to say, although the TV to date has only a function as a receiving medium, the demand for the bidirectional function by the appearance of the personal computer and the Internet has exploded, so that the future TV has a function as a bidirectional terminal.

Finally, the analog TV market is saturated.

In other words, current demand in Korea is more than 2 units per household, so no further demand can be expected.

[0004] As shown in FIG. 1, a general digital TV includes a front end 10 for inputting a digital RF signal, And a back end 20 for signal processing.

The front end unit 10 includes a tuner / link unit 11 for demodulating the RF signal received through the antenna, and the back end unit 20 processes the demodulated broadcast signal by digital signal processing, Audio decoder 23, an NTSC / PAL encoder 24, an OSD (On Screen Display) / graphics accelerator 25, a peripheral processor 26, An IEEE1394 27, a traffic controller 28, an application software data storage DRAM 29, an OSD data storage SRAM 30, and the like.

In operation of the digital TV configured as described above, a transport packet transmitted in QPSK modulation in the transmitter is input to the tuner / link unit 11 via the antenna.

Then, the transport packet corresponding to the broadcast program selected by the user using the remote controller is separated into the audio, video and system information (PSI) in the TP separator 21 under the control of the microcomputer 22 via the I ² C bus .

The audio data is output to the speaker via the video / audio decoder 23 and the amplifier (not shown), and the video data is output to the RGB / Y / C decoder 23 via the video / audio decoder 23 and the NTSC / PAL encoder 24. [ C, CVBS, or the like, and displayed by the user through a CRT or FPD (Flat Panel Display).

At the same time, the system information, that is, user information, caption data, teletext, broadcast guide information, and OSD data are displayed on the screen together with the video signal via the OSD /

Meanwhile, the peripheral device processor 26 interfaces with a remote controller, a GPIO, a smart card, a modem, and the like via an external input terminal to interface various broadcast information and user related information.

At this time, the traffic controller 28 controls the flow of the overall digital signal, and at the same time controls the memory access operation of the DRAM 29 and the SRAM 30.

Such a digital TV dramatically improves the image quality of an analog TV, providing a picture quality twice as high as that of an analog TV, and has no interference between adjacent channels, making it possible to use all of the previously unused channel areas.

In addition, according to Program Information Service Protocol (PSIP), which is a broadcasting supplementary information standard providing detailed information on a broadcasting program among Advanced Television Service Committees (ATSC) proposed in the United States in November 1997, (HD) digital broadcast program or four standard definition (SD) digital broadcast programs per channel in a 6-MHz band, thereby providing the advantage of providing hundreds of various services. It provides Internet services, home shopping, and home banking services, so analog channels are likely to be replaced by digital channels in the near future.

At this time, in more detail, the PSIP standard defines a major channel number and a minor channel number for channel allocation. The major channel number is allocated to the 6 MHz band used for terrestrial broadcast And a minor channel number indicates a channel number assigned to a digital service channel transmitted through the 6 MHz band.

However, ATSC assigns a specific value to each broadcaster for a major channel, while a minor channel number can be changed from time to time by allowing a broadcaster to manage a minor channel assignment.

Therefore, by using the terrestrial virtual channel table (TVCT), which is a digital channel information table provided in the PSIP, major channel and minor channel information of a plurality of digital channels can be grasped.

Major channel number Minor channel number Short name Carrier frequency (MHz) Channel TS ID Program number flag Service type Source ID Explanation 12 0 NBZ 205.25 0X0AAO 0X0AA0 . Analog 20 Channel name 12 One NBZD 620.31 0X0AA1 0X00F1 . Digital 21 Channel Name / Service Location 12 5 NBZ-S 620.31 0X0AA1 0X00F2 . Digital 22 Channel Name / Service Location 12 12 NBZ-M 620.31 0X0AA1 0X00F3 . Digital 23 Channel Name / Service Location 12 31 NBZ-H 620.31 0X0AA1 0X00F8 . Digital 24 Channel Name / Service Location

Table 1 shows an example of the TVCT. The major channel number of the broadcasting company is assigned 12, and the minor channel number is arbitrarily assigned to the broadcasting company as 0,1,5,12,31.

Also, in the current ATSC standard, only the information about the channel required by the broadcasting company is transmitted, and information on all channels other than the currently received broadcasting channel can not be updated.

That is, when the channel information of the 11th channel is changed while the current user is viewing the NBZD of the physical channel 12, the information of the changed channel 11 can not be updated.

Since the digital channel according to the related art has a major channel and a corresponding minor channel, a user must select a major channel number and a minor channel number in order to view one of them. There is a problem that the user is confused in selecting a channel and inconvenience is increased.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a channel display method of a digital TV that facilitates user's channel selection.

1 is a block diagram showing a configuration of a general digital television

2 is a flowchart showing a channel display method of a digital TV according to the first embodiment of the present invention.

3 is a view showing an example of screen display according to Fig. 2

4 is a flowchart showing a channel display method of a digital TV according to a second embodiment of the present invention.

5 is a view showing an example of screen display according to Fig. 4

According to an aspect of the present invention, there is provided an analog / digital TV having a multi-picture function, the method comprising: receiving a digital terrestrial wave to decode and store channel information selected by a user; And displaying a channel selected by the user among the minor channels displayed on the screen in the multi-picture mode on the entire screen.

According to another aspect of the present invention, there is provided a digital TV, comprising: receiving digital terrestrial waves to decode and store channel information selected by a user; displaying a major channel of a channel selected by the user on the entire screen; Displaying the channel information of the minor channel on the major channel screen in the OSD form and displaying the minor channel selected by the user on the full screen according to the minor channel information displayed in the OSD form.

Hereinafter, a channel display method of a digital TV according to an embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 2 is a flowchart illustrating a channel display method of a digital TV according to a first embodiment of the present invention, and FIG. 3 is a diagram illustrating an example of screen display according to FIG.

As shown in FIG. 2, the microcomputer firstly determines whether a channel up / down key signal is inputted (S11) or not if a channel selection number key signal is inputted (S13). When a channel up / down key signal is inputted, the control unit applies a control signal to each part of the TV so that the corresponding channel is selected and digital signal processed (S12).

If the channel selection number key signal is input (S13), the digital channel information table, that is, the channel information of the corresponding major channel allocated to the TVCT is decoded and stored in the memory (S14).

Next, the number of the minor channels included in the major channel is checked, and the image information is sequentially decoded and stored in the respective field memories, and simultaneously displayed as a still picture of a multi picture mode type as shown in FIG. 3 (S15).

At this time, the still image is obtained by repeatedly decoding the image information of the corresponding minor channel stored in the field memory and performing screen processing.

Then, each minor channel number, broadcasting station name, and program name of the previously stored channel information are displayed at the bottom of the corresponding minor channel screen (S16).

When the user presses a direction key to select one of the minor channels (S17), the border of the corresponding minor channel screen is highlighted, and the continuous image information is decoded and displayed to display as a moving picture (S18).

When the user completes the selection of the minor channel and presses the full screen display key (S19), the microcomputer clears the current multi-picture mode and displays the corresponding minor channel on the entire screen (S20).

At this time, the key signal input unit or remote controller of the digital TV according to the present invention includes a direction key for selecting one of the minor channels and a full screen display key for displaying the selected minor channel over the entire screen.

Hereinafter, a channel display method of a digital TV according to a second embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 4 is a flowchart illustrating a channel display method of a digital TV according to a second embodiment of the present invention, and FIG. 5 is a diagram illustrating an example of screen display according to FIG.

As shown in FIG. 4, the microcomputer first determines whether a channel up / down key signal is input (S31) or not if a channel selection number key signal is input, according to the second embodiment of the present invention. (S33). When the channel up / down key signal is inputted, the television receives the control signal to display the channel on the full screen so that the channel is selected and the digital video signal is processed (S32).

If the channel selection number key signal is input (S33), the digital channel information table, that is, the channel information of the corresponding major channel allocated to the TVCT is decoded and stored in the memory (S34).

Subsequently, the first minor channel among the minor channels included in the major channel is demodulated, and the image information is digitally processed and displayed on the entire screen (S35).

Then, the channel number, broadcasting station name, and program name of all minor channels among the previously stored channel information are sequentially displayed on the screen as shown in FIG. 5 (S36).

Subsequently, the user selects one of the minor channels using the channel up / down key and presses the full screen display key (S37), and displays the corresponding minor channel on the entire screen (S38).

The channel display method of the digital TV according to the present invention displays all of the minor channel programs transmitted to the channel selected by the user in a multi-picture format or OSD format together with the program title, It is possible to accurately and easily grasp the program, and the desired program can be selected and watched only by a simple key operation, thereby eliminating the inconvenience caused by the selection of the user's channel, thereby maximizing the user's satisfaction and reliability of the product.

Claims (6)

In an analog / digital TV having a multi-picture function, Receiving digital terrestrial waves and decoding and storing channel information selected by the user; Displaying minor channels of the channel selected by the user on a screen in a multi-picture mode; And displaying a channel selected by a user among the minor channels displayed in the multi-picture mode on the screen on the full screen. The method according to claim 1, Wherein the channel selected by the user among the minor channels displayed in the multi-picture mode on the screen in the step of displaying the minor channels on the screen in the multi-picture mode is displayed as a moving picture. 3. The method of claim 2, Wherein the boundary portion of the minor channel screen displayed by the moving picture displays a boundary line of the OSD type or highlights the boundary line to distinguish it from the minor channel of the still image. The method according to claim 1, Wherein the step of displaying the minor channels in the multi-picture mode comprises the steps of displaying a minor channel in a multi-picture mode on the screen, simultaneously displaying each minor channel number assigned to the digital channel information table, The method of claim 1, further comprising the step of displaying the channel on the digital TV. On the digital TV, Receiving digital terrestrial waves and decoding and storing channel information selected by the user; Displaying a major channel of the channel selected by the user on the entire screen and simultaneously displaying channel information of a corresponding minor channel among the pre-stored channel information on the major channel screen in an OSD form; And displaying the selected minor channel on the entire screen according to the minor channel information displayed in the OSD format. 6. The method of claim 5, The step of displaying the channel information of the corresponding minor channel among the previously stored channel information on the major channel screen in the OSD form is a step of displaying the program name allocated to the previously stored digital channel information table on the major channel screen in OSD form A method of displaying a channel on a digital TV.