KR20000013993A - Channel displaying method of digital television receiver - Google Patents

Abstract

PURPOSE: A channel displaying method of a digital television receiver capable of easily performing a channel selection of a user is provided. CONSTITUTION: A channel displaying method of a digital television receiver which has a multi-picture function, the method comprising: receiving a digital ground wave and decoding and storing channel information selected by a user; displaying minor channels of a channel selected by the user in a multi picture mode; and displaying the channel selected by the user among minor channels displayed in a multi-picture mode on the screen.

Description

Channel Display Method of Digital TV

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

Analog receivers are being introduced to consumers in various forms, starting with small models like the 14-inch to projection TVs over 60 inches.

However, the current analog TV shows various problems as it becomes larger and more functionalized. First, in view of image quality, the quality of video quality is degraded when watching the current TV broadcasting quality such as NTSC, PAL or SECAM on a large TV. You can experience it.

Second, in view of the limit of broadcasting channels that can be serviced in the future, the number of currently allocated TV broadcasts is limited to about 80 in total in both microwave and microwave channel bands. It is only about.

Third, the limitation as a unidirectional medium is mentioned.

That is, TV until now has only a function as a reception medium, but as the demand for interactive functions explodes due to the appearance of personal computers and the Internet, future TVs are required to function as interactive terminals.

Finally, the saturation of the analog TV market.

In other words, Korea currently has more than 2 units of supply per household, so we cannot expect any more demand.

Accordingly, a digital TV has emerged as a solution for solving the problems of the analog TV market. As shown in FIG. 1, a general digital TV has a front end unit 10 for digital RF signal input. It consists of a back end 20 (Back End) for signal processing.

At this time, the front end unit 10 is composed of a tuner / link unit 11 for demodulating the RF signal received through the antenna, and the back end unit 20 digitally processes the demodulated broadcast signal to monitor and speaker. TP separator (21), microcomputer (22), video / audio decoder (23), NTSC / PAL encoder (24), OSD (On Screen Display) / Graphics accelerator (25), peripheral processor (26) And an IEEE 1394 27, a traffic controller 28, a DRAM 29 for application software data storage, an SRAM 30 for OSD data storage, and the like.

In addition, referring to the operation of the digital TV configured as described above, a transport packet transmitted after being QPSK modulated by the transmitter is input to the tuner / link unit 11 via an antenna.

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

Among them, the audio data is output to the speaker via the video / audio decoder 23 and an amplifier (not shown), and the image data is RGB, Y / via the video / audio decoder 23 and the NTSC / PAL encoder 24. It is output to C, CVBS, etc. and displayed for viewing by the user through CRT or Flat Panel Display (FPD).

At the same time, the system information, namely, user information, caption data, teletext, broadcast guide information, and OSD data, are also displayed on the screen together with the video signal via the OSD / graphic accelerator 25.

On the other hand, the peripheral processor 26 is connected to the remote control, GPIO, smart card, modem and the like through 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 digital signal as well as the memory access operation of the DRAM 29 and the SRAM 30.

Such digital TVs dramatically improve the video quality of analog TVs, providing more than twice as much clear image quality as analog TVs, and because there is no interference between adjacent channels, all channel areas that have not been used in the past can be used.

In addition, according to the Program Service Information Protocol (PSIP), a broadcasting supplementary information standard that provides detailed information about broadcast programs in the US Digital TV Standard Advanced Television Service Committe (ATSC) proposed in November 1997, One high-resolution (HD) digital broadcast program or four standard-definition (SD) digital broadcast programs can be transmitted per channel, that is, a 6 MHz band, which can provide hundreds of diverse services. By providing services such as Internet service, home shopping, and home banking, it is highly likely that analog channels will be replaced by digital channels in the near future, and explosive demand window is expected in the future.

At this time, the PSIP standard is described in more detail. Major channel numbers and minor channel numbers have been enacted for channel allocation. The major channel numbers are allocated to the 6 MHz band used for terrestrial broadcasting. The channel number represents a channel number, and the minor channel number represents a channel number allocated to a digital service channel transmitted through a 6 MHz band.

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

Therefore, using the TVRS (Terrestrial Virtual Channel Table), which is a digital channel information table provided by PSIP, major channel and minor channel information of a plurality of digital channels can be identified.

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 TVCT, and the major channel number of the broadcaster is allocated to 12, and the minor channel number is arbitrarily assigned to the broadcaster, such as 0,1,5,12,31.

In addition, the current ATSC standard is to transmit only the information on the channel owned by the broadcasting company, information on all channels other than the currently received broadcast channel is not updated.

That is, if the channel information of channel 11 is changed while the user is watching NBZD of physical channel 12, the changed channel 11 information cannot be updated.

Since the digital channel according to the related art has major channels and minor channels, the user must select a major channel number and a minor channel number in order to watch one of them. Since the minor channel number can be changed by the broadcasting company, There is a problem in that the user selects a channel, causing confusion and increasing discomfort.

Accordingly, an object of the present invention is to provide a channel display method of a digital TV, which is designed to solve the above-mentioned problems.

1 is a block diagram showing the configuration of a typical digital TV

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

3 is a view showing an example of the screen display according to FIG.

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 diagram showing an example of the screen display according to FIG.

The present invention provides an analog / digital TV with a multi-picture function, receiving digital terrestrial waves, decoding and storing channel information selected by a user, and displaying minor channels of a channel selected by the user in a multi-picture mode. And displaying the channel selected by the user on a full screen among the minor channels displayed in the multi picture mode on the screen.

In still another aspect of the present invention, a digital TV receives a digital terrestrial wave, decodes and stores channel information selected by a user, displays a major channel of a channel selected by the user on a full screen, and corresponds to previously stored channel information. And 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.

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 a screen display according to FIG. 2.

In the channel display method of the digital TV according to the first embodiment of the present invention, as shown in FIG. 2, first, the microcomputer determines whether a channel up / down key signal is input (S11) or a channel selection numeric key signal is input. In operation S13, when a channel up / down key signal is input, a control signal is applied to each part of the TV so that the corresponding channel is tuned and processed digitally and displayed on the full screen (S12).

On the other hand, when the determination result (S13), when the channel selection numeric key signal is input, 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 corresponding memory (S14).

Subsequently, the number of minor channels included in the major channel is checked, and the image information is sequentially decoded and stored in each field memory to be simultaneously displayed as a still picture in the form of a multi picture mode as shown in FIG. 3. (S15).

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

In addition, 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).

Subsequently, when the user selects one of the minor channels by pressing the direction key (S17), the edge of the corresponding minor channel screen is highlighted and the continuous video information is decoded and processed to display the video (S18).

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

At this time, the key signal input unit or the remote controller of the digital TV according to the present invention includes a direction key for selecting one of the above-described 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.

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 a screen display according to FIG. 4.

In the channel display method of the digital TV according to the second embodiment of the present invention, as shown in FIG. 4, the microcomputer first determines whether a channel up / down key signal is input (S31) or a channel select numeric key signal is input. (S33), when the channel up / down key signal is input, the control signal is applied to each part of the TV so that the corresponding channel is selected and processed by the digital video signal (S32).

On the other hand, when the determination result (S33), when the channel selection numeric key signal is input, 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 corresponding memory (S34).

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

Channel numbers, broadcast station names, and program names of all minor channels among the previously stored channel information are sequentially displayed on the screen as shown in FIG. 5 (S36).

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

The channel display method of the digital TV according to the present invention displays all the minor channel programs transmitted to the channel selected by the user in a multi-picture form or an OSD form together with the program title, so that the programs included in the broadcasting channel selected by the user can be quickly displayed. Accurate and easy to grasp and can select and watch the desired program with a simple key operation to solve the inconvenience of the user's channel selection to maximize the user's product satisfaction and reliability.

Claims (6)

In analog / digital TV with multi-picture function, Receiving digital terrestrial waves and decoding and storing channel information selected by a 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 the user on a full screen among the minor channels displayed in the multi-picture mode on the screen. The method of claim 1, In the step of displaying the minor channels on the screen in a multi-picture mode, a channel selected by the user among the minor channels displayed in the multi-picture mode on the screen is displayed as a video. The method of claim 2, The boundary portion of the minor channel screen displayed as the moving picture is displayed on the OSD or is processed by highlighting the boundary line of the digital TV channel characterized in that it is distinguished from the minor channel of the still image. The method of claim 1, Displaying the minor channels on the screen in the multi-picture mode may include displaying the minor channels on the screen in the multi-picture mode and simultaneously displaying the respective minor channel numbers, broadcasting station names, and program names assigned to the digital channel information table. The channel display method of the digital TV, characterized by further comprising the step of displaying on. In digital TV, Receiving digital terrestrial waves and decoding and storing channel information selected by a user; Displaying the major channel of the channel selected by the user on a full screen and displaying channel information of the corresponding minor channel among previously stored channel information on the major channel screen in an OSD form; And displaying a minor channel selected by a user on a full screen according to the minor channel information displayed in the OSD form. The method of claim 5, Displaying the channel information of the corresponding minor channel among the pre-stored channel information on the major channel screen in the OSD form is displaying the program name assigned to the previously stored digital channel information table on the major channel screen in the OSD form. The channel display method of the digital TV.