KR19990016103A - How to set channel of cable TV - Google Patents

Abstract

In the present invention, a satellite TV receiver capable of receiving a satellite broadcast signal and a cable TV broadcast signal detects whether an actual broadcast signal is input to each channel of the cable TV, and accordingly, sets a channel of the cable TV to which only the actual broadcast signal is provided. A search method, comprising: a first step of displaying a guide screen for each channel assigned to the cable TV when a channel guide key signal of the cable TV is input during the normal viewing mode of the satellite broadcasting receiver; When a channel search key signal for searching for an effective channel of the TV is input, a second step of sequentially tuning each channel of the cable TV provided through the transmission path to detect a synchronization signal, and each channel from which the synchronization signal is detected Sequentially store the channel information for the cable TV. A third step of updating the beam, and a fourth step of reading each channel information of the updated cable TV, and displays the updated channel guide screen according to the completion of the tuning process.

Description

How to set channel of cable TV

The present invention relates to a satellite broadcast receiver, and more particularly, in a satellite broadcast receiver capable of receiving a satellite broadcast signal and a digital CATV broadcast signal, a cable TV suitable for setting only a channel to which an actual broadcast signal is input among the channels provided to the CATV. It relates to a channel setting method of.

As is well known, satellite broadcasting is a broadcasting satellite that receives a broadcast signal from a ground station (broadcasting earth station) using a broadcasting satellite floating in a stationary orbit of 36,000 km over the equator, and can receive it directly from a satellite receiving antenna in each home. This system is a broadcasting method in which the information selection range is greatly expanded compared to the conventional terrestrial or cable broadcasting system.

Meanwhile, the bit stream provided from the satellite includes various information such as broadcast signals (video data and audio data), event information table (EIT), and time data table (TDT) for each channel. Information about broadcast channels, that is, channel names for broadcasting stations and program information for each channel is included and displayed on a screen according to a user's request.

The satellite broadcasting receiver used for the satellite broadcasting receives the bit stream provided from the satellite, processes the broadcast signal of the selected channel, and then provides the signal to a display device (for example, TV) to display on the screen. In addition to the signal, it is also possible to receive digital CATV broadcast signals.

Therefore, in the satellite broadcasting receiver capable of receiving the satellite broadcasting signal and the CATV broadcasting signal, the satellite broadcasting channel and the CATV broadcasting channel are respectively provided, and when the user inputs a key signal for calling the channel guide screen, the satellite broadcasting channel and The guide screen including the CATV broadcasting channel is displayed, and the user selects a desired channel with reference thereto.

However, each CATV channel information displayed in the conventional channel guide screen is displayed including a channel through which an actual broadcast signal is not input.

That is, for example, when a channel guide key signal of CATV is input in a state in which channels CH 1 to CH 50 are allocated as CATV broadcasting channels to CATV broadcasting in a satellite broadcasting receiver, the channel allocation key signals of CATV are allocated to CATV as shown in FIG. 4. All the channels CH 1 to CH 50 are displayed. In this case, there is an invalid channel to which no broadcast signal is input to each displayed CATV channel.

When displaying the CATV channel guide screen of the satellite broadcasting receiver, if only the channel to which the actual broadcast signal is input is detected and displayed, it is possible to provide convenience to the user and thereby satisfy various user's desires. Will be.

Accordingly, the present invention has been devised in view of the above, and when displaying the channel guide screen of CATV in the satellite broadcast receiver, it is possible to determine whether or not the actual broadcast signal input for each channel to display only the channel to which the broadcast signal is input. The purpose is to provide a channel setting method of the CATV.

In order to achieve the above object, the present invention provides a method for setting a channel of the digital cable TV in a satellite broadcast receiver for receiving and displaying a satellite broadcast signal provided from a satellite and a digital cable TV broadcast signal provided through a transmission path. When the channel guide key signal of the cable TV is input while the satellite broadcasting receiver is in the normal viewing mode, a first step of displaying a guide screen for each channel allocated to the cable TV, and the effective channel of the cable TV. When a channel search key signal for searching is input, a second step of sequentially tuning each channel of the cable TV provided through the transmission path to detect a synchronization signal, and sequentially storing each channel where the synchronization signal is detected Updating channel information for the cable TV; In step 3, when the tuning process is completed, the channel setting method of the cable TV comprises a fourth step of reading each channel information of the updated cable TV and displaying the updated channel guide screen accordingly.

1 is a channel TV search method suitable for applying the channel setting method of the cable TV according to an embodiment of the present invention,

2 is a view showing an example on the channel guide screen of the cable TV according to an embodiment of the present invention,

3 is a flowchart illustrating a channel setting process of a cable TV in a preferred embodiment of the present invention;

4 is a diagram illustrating an example of a guide screen for a cable TV channel in a conventional satellite broadcasting receiver.

＊ Explanation of symbols for main parts of drawing

10: key input unit 20: micom

30 tuner and demodulator 40 sync signal detector

50: memory 60: OSD

70: MPEG decoder 80: signal processor

The above and other objects and various advantages of the present invention will become more apparent from the preferred embodiments of the present invention described below with reference to the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a satellite broadcasting receiver suitable for applying a method for displaying channel information of a cable TV according to an exemplary embodiment of the present invention, and includes a key input unit 10, a microcomputer 20, a tuner, and a demodulator 30. And a synchronization signal detection unit 40, a memory unit 50, an OSD unit 60, an MPEG decoder 70, and a signal processing unit 80.

The key input unit 10 is composed of key metrics on a remote controller or its own panel to generate a corresponding key signal to the microcomputer 20 by a user's manipulation, and in particular, CATV registered in the memory unit 50 to be described later. And a function key for displaying various menu screens and a key for deleting respective channel information.

The microcomputer 20 supplies a control signal for performing a function corresponding to the key signal from the key input unit 10, a tuning control signal for tuning the broadcast channel, and a control signal for driving the OSD unit 60. The control signal is generated according to the presence or absence of the synchronization signal detected by the synchronization signal detection unit 40 to be described later.

The tuner and demodulator 30 is a complex tuner capable of receiving a satellite broadcast signal received through a satellite antenna (not shown) and a CATV broadcast signal provided through a transmission path. The bit stream of the corresponding channel is tuned, and then demodulated and provided to the MPEG decoder 70. At this time, the sync signal detector 40 is provided from the broadcast signal of the decoded CATV output from the tuner and the demodulator 30. The synchronization signal is detected and provided to the microcomputer 20.

Meanwhile, the MPEG decoder 70 separates and decodes the broadcast signal provided from the above-described tuner and demodulator 30 into an audio signal, a video signal, and various program information, and provides the decoded signal to the signal processor 80. Data for various types of information provided from 60 are also provided to the signal processing unit 80 after a predetermined signal processing process.

In addition, the signal processor 80 converts the digital video signal of the frame unit provided by decoding from the MPEG decoder 70 into an NTSC or PAL signal and displays it on a monitor (not shown), and decoded from the MPEG decoder 70. The audio signal is converted into an analog signal and output to the speaker not shown.

The memory unit 50 registers / updates various channel information decoded and output from the above-described MPEG decoder 70, deletes the channel information of the registered CATV under the control of the microcomputer 20, and then again the microcomputer 20 The stored channel and channel name are outputted under the control of).

In the satellite broadcasting receiver configured as described above, during the normal viewing mode in which a specific channel of the satellite broadcast signal or the CATV broadcast signal selected by the user is displayed through a predetermined signal processing process, the user operates the key input unit 10 to control the CATV. When the channel guide screen is called, the microcomputer 20 reads the channel information stored in the memory unit 50 based on the input key signal and provides the channel information to the OSD unit 60. The OSD unit 60 The input channel information is composed of OSD data and provided to the MPEG decoder 70.

In addition, the MPEG decoder 70 displays the OSD data on a monitor not shown through the signal processor 80 through a predetermined signal processing process, and the channel guide screen to be displayed is satellite broadcast as shown in FIG. 4. The channel guide screen of CATV is displayed, including all channels assigned to CATV at the receiver.

At this time, when the user inputs a channel search key signal to register only a broadcast channel to which an actual broadcast signal is input in each channel of the displayed CATV, the microcomputer 20 receives each of the CATV received by the tuner and the demodulator 30. A control signal for tuning the channel is generated, and the tuner and demodulator 30 tunes each channel of the CATV under the control of the microcomputer 20.

The synchronization signal detector 40 detects the synchronization signal from the broadcast signal of each channel tuned and demodulated by the tuner and the demodulator 30, and the microcomputer 20 detects the synchronization signal from the synchronization signal detector 40. By storing each channel to be stored in the memory unit 50, the CATV channel guide information is updated.

When the search process for each channel assigned to the CATV is completed in the satellite broadcast receiver through the above-described process, the microcomputer 20 reads the CATV channel guide information stored in the memory unit 50 to the OSD unit 60. The OSD unit 60 converts CATV channel information into OSD data and provides them to the MPEG decoder 70 and the signal processor 80, thereby displaying the updated channel guide screen as shown in FIG.

That is, as shown in the figure, a CATV channel guide screen including only channels through which actual CATV broadcast signals are input is displayed among the channels of the satellite broadcast receivers allocated to CATV.

3 is a flowchart illustrating a channel setting process of a cable TV according to an exemplary embodiment of the present invention, which will be described in detail with reference to the accompanying drawings.

During the normal viewing mode in which the satellite broadcast receiver receives and displays the satellite broadcast signal or the CATV broadcast signal (step 301), when the channel guide key signal of the CATV for displaying each channel of the CATV is input (step 303), it is assigned to the CATV. The guide screen for each channel is displayed on the screen through the OSD unit 60 (step 305).

In the state where the channel guidance screen for CATV is displayed through the above-described process, if a predetermined time elapses without a key signal for executing a specific command (step 309), the microcomputer 20 controls After the currently displayed channel guide screen is turned off, the mode changes to the normal viewing mode of the initial step 301 (step 311).

If the user inputs a CATV channel search key signal for displaying only a channel to which an actual broadcast signal is input (step 307), the tuner and demodulator 30 is controlled by the microcomputer 20. Tunes each channel of the CATV provided through the transmission path (step 313), and the synchronization signal detector 40 detects the synchronization signal from each of the tuned CATV broadcast channel signals (step 315).

Each channel information from which the synchronization signal is detected is stored in the memory unit 50 under the control of the microcomputer 20. That is, the above-described steps 313 to 317 are repeatedly performed to tune each channel allocated to the CATV, and each channel in which the synchronization signal is detected is stored in the memory unit 50 under the control of the microcomputer 20.

When the tuning for each channel of the CATV is terminated through the above-described process (step 319), the microcomputer 20 reads the CATV channel information stored in the memory unit 50 and provides it to the OSD unit 60 for updating. The displayed CATV channel guide screen is displayed on a monitor not shown (step 323).

In addition, when the CATV channel guide screen is called by the user after the information on the channel into which the actual broadcast signal of the CATV is input is stored in the memory unit 50 through the above-described process, the CATV channel guide information stored in the memory unit 50 is stored. Based on this, the channel guide screen of the CATV to which the actual broadcast signal is input is displayed.

As described above, according to the present invention, the satellite broadcasting receiver capable of receiving the CATV broadcast signal determines whether the broadcast signal is input to each channel of the CATV and displays a channel guide screen including only the channel to which the actual broadcast signal is input. There is an effect that can provide convenience when the user selects a channel.

Claims (2)

A method of setting a channel of a digital cable TV in a satellite broadcast receiver for receiving and displaying a satellite broadcast signal provided from a satellite and a digital cable TV broadcast signal provided through a transmission path, A first step of displaying a guide screen for each channel allocated to the cable TV when a channel guide key signal of the cable TV is input during the normal viewing mode of the satellite broadcasting receiver; A second step of detecting a synchronization signal by sequentially tuning each channel of the cable TV provided through the transmission line when a channel search key signal for searching for an effective channel of the cable TV is input; A third step of sequentially storing each channel from which the synchronization signal is detected and updating channel information on the cable TV; And the fourth step of reading the channel information of the updated cable TV and displaying the updated channel guide screen according to the tuning process. The channel setting of the cable TV according to claim 1, further comprising: automatically turning off the displayed guide screen when a predetermined time elapses without the channel search key signal being input. Way.