KR20050047616A - Method for searching additional information of channel of broadcating signal receiver - Google Patents

Abstract

Disclosed is a channel search method of a broadcast receiver capable of retrieving additional information of a selected channel from an analog channel map and a digital channel map created according to a program and system information protocol. According to the present invention, the analog and digital channel search is automatically performed only by selecting the desired channel, so that the additional information of the analog and digital channels can be easily known, and the convenience of the product can be further improved.

Description

Channel Search Method for Broadcast Receivers {METHOD FOR SEARCHING ADDITIONAL INFORMATION OF CHANNEL OF BROADCATING SIGNAL RECEIVER}

The present invention relates to a channel search method of a broadcast receiver, and more particularly, to search for additional information of a selected channel from an analog channel map and a digital channel map created according to a program and system information protocol (PSIP). The present invention relates to a channel search method of a broadcast receiver.

 In general, an MPEG2-compatible digital broadcasting system basically transmits a program association table (PAT) and a program map table (PMT) defined in ISO 13818-1. In the case of a pay broadcasting system using a conditional access system (CAS), a conditional access table (CAT) is added. The European Video Broadcasting Standard (DVB), based on MPEG2, defines and uses additional tables on top of these three tables for program guides, grouping services, and additional data services. The system is configured by extracting only the tables that are defined as follows, adding some modifications, and adding new descriptors.

The American Broadcasting Standard (ATSC) is also MPEG-2 compatible system, so it is required to transmit PAT and PMT. It is possible to find the packet identifier (PID) of the desired channel only with the Channel Table. In this way, the ATSC digital television receiver can know the PID only with MGT and VCT, thereby minimizing the time from initial power-up to tuning.

Here, the PSIP of ATSC is the modulation method, carrier frequency, PID, service configuration, etc. of each channel that the receiver needs to know in order to receive the program, rating information to be applied to the program, and detailed information necessary for program guide configuration (program title, Start time, length, content summary), time information indicating current time, including the transmission period and transmission speed of these contents.

However, while satellite or cable broadcasting, a single system operator (SO) collects program information and transmits unified channel information and program guide information, PSIP is designed for ATSC terrestrial broadcasting and each program has its own program and system information. It only requires sending. That is, in the case of DVB compatible satellite broadcasting, if only one repeater is tuned to receive a program related table (PAT), program numbers for all programs provided by the current broadcast can be known, and the event information table (EIT: Event Information) of the repeater can be known. Table can extract the guide information for the entire program. ATSC, however, is tuned to the frequency of one station and receives only the Master Guide Table (MGT) and Virtual Channel Table (VCT), but only programs from that carrier frequency are defined. I didn't know.

Therefore, recently, in order to know additional information on all channels that can receive broadcasts, the ATSC-standard terrestrial digital television receives tables according to the program and system information protocol (PSIP) to obtain the entire channel map. In this way, through the configured channel 채널, additional information of all channels was known.

However, after determining whether each broadcast signal received through all the receivable channels is analog or digital, the respective analog and digital channel 멥 are formed according to the determined result, and the channel search through the channel 은 is performed to the user. By selecting one of the button for analog broadcasting tuning or the button for digital broadcasting tuning by selecting the desired channel, and after the channel search through the channel 수 additional information about the selected channel can be known, so searching for the additional information of the channel There was a complicated problem.

Accordingly, the present invention has been made in order to solve the above problems, the present invention is a channel search method of the broadcast receiver that can easily know the additional information of the selected channel because the analog and digital channel search is automatically performed only by selecting the desired channel The purpose is to provide.

The channel search method of the broadcast receiver according to the present invention for achieving the above object,

A method for searching a channel after an analog channel map and a digital channel map is created according to a program and system information protocol,

a) receiving broadcast signals for all selectable channels to form and store analog channel maps and digital channel maps;

b) checking whether the power is supplied and the channel selected by the user is the same channel as the channel of the previously received broadcast signal;

c) If it is determined in step b) that the channel is not the same channel, if the selected channel is searched in the digital channel map and judged to be in the digital channel map, additional information of the selected channel in the digital channel 멥 is displayed on the screen. If the additional information is not found in the digital channel map, searching the analog channel map to determine that the additional information of the selected channel is in the analog channel map, and displaying the additional information of the selected channel in the analog channel map on the screen;

d) if it is determined in step c) that the selected channel is not in the analog channel map, if the tuning is successful after analogue tuning of the broadcast signal of the selected channel, displaying analog channel additional information on the screen;

e) If it is determined that the channel selected in step b) is the same channel as the channel currently being received, it is checked whether the channel being watched is a digital channel and if it is not a digital channel, if it is in the analog channel 멥, Displaying channel additional information on the channel 에 on a screen;

f) If it is determined in step e) that the channel being watched is not in the analog channel 하면, if the tuning is successful after digitally tuning the broadcast signal of the channel being watched, the channel additional information is displayed on the screen. If not successful, displaying no-signal channel additional information on the screen; And

g) If it is determined in step e) that the channel currently being received is a digital channel, if it is determined that the selected virtual channel is checked for other physical channels, tuning channel additional information for another physical channel having the selected virtual channel is performed. If the additional information about all the physical channels having the selected virtual channel is completed, if the additional information of all the physical channels is not completed, the next physical channel having the next selected virtual channel tunes the additional information. It is characterized by including the step of displaying on the screen.

According to the present invention, when the additional information on the selected channel and the same channel as the channel currently being received are received, it is determined that the virtual channel is selected so that the additional information of another physical channel having the selected virtual channel is automatically obtained from the analog and digital channels. The search is made so that the additional information of the analog and digital channels can be easily known, thereby further improving the convenience of the product.

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

1 is a diagram illustrating a configuration of a broadcast receiver to which the present invention is applied. As shown in FIG. 1, the broadcast receiver to which the present invention is applied includes an antenna 101, a tuner 103, and a tuner 103. When the received broadcast signal is digital, the digital broadcast processor 110 provided with the demultiplexer 111, the video decoder 113, and the audio decoder 115 that processes the received broadcast signal and the tuner 103 are provided. When the received broadcast signal is analog, an analog broadcast processor 120 provided by the image processor 121 and the audio processor 123 is provided to process the received broadcast signal.

In addition, the present invention further includes a controller 150 for determining whether the broadcast signals of all channels received through the tuner 103 are analog or digital channels and storing the broadcast signals in the memory unit 130 in the form of channel 멥. The controller 150 is provided to search for and display additional information of the selected channel through a search process of the analog channel 디지털 and the digital channel 저장된 stored in the memory 130.

In the broadcast receiver to which the present invention is applied as described above, broadcast signals of all channels receivable through the antenna 101 are first tuned through the tuner 103 and applied to all channels tuned by the tuner 103. The broadcast signal for the broadcast signal is supplied to the controller 150. When the broadcast signal for all the physical channels and the virtual channels is first tuned in a digital broadcast method, the controller 150 provides additional information about the channel of the digital broadcast signal. If the tuning is not successful, and the tuning is not successful, the additional information about the channel of the analog broadcast signal is stored in the memory 130 in the form of an analog channel 멥.

That is, a complete channel map may be formed only after the user selects 82 or more physical channels (PCs) at least once, and even if the configuration of the virtual channel is changed in the physical channel even after the complete channel map is configured, all the physical channels having the selected virtual channel are changed. You can also configure the channel tune by tuning the channel.

 After that, a predetermined time has elapsed, and the previously watched broadcast signal of the broadcast signal of the channel receivable through the antenna 101 is tuned by the tuner 103 and displayed on the screen.

When the previously viewed broadcast signal is changed by the user, the controller 150 receiving the channel of the broadcast signal tuned by the current tuner 103 checks whether the selected channel is the same as the channel currently being viewed, and is not the same. The digital channel 저장된 stored in the memory unit 130 and the analog channel map are sequentially searched. If the digital channel 멥 or the analog channel 가 has additional information of the selected channel, the additional information of the selected channel is displayed on the screen. If there is no information, if the tuning is successful by tuning the broadcast signal in an analog manner, the additional information of the channel included in the selected broadcast signal is received again and displayed on the screen.

The controller 150 determines that the virtual channel of the physical channel being viewed is selected when the selected channel is the same as the channel currently being watched (when the channel is selected as the same channel as the channel being watched). If it is not a digital channel, it checks whether it is a channel and searches the analog channel map. If there is additional information of the selected channel in the analog channel 표시, the additional information of the selected channel is displayed on the screen. If the tuning is successful by digitally tuning the signal, if it is checked whether there is additional information of the channel included in the broadcast signal of the selected channel, the additional information of the selected virtual channel is displayed on the screen.

In addition, if there is no additional information of a channel included in the selected broadcast signal, the channel additional information of no signal is displayed on the screen.

When the controller 150 determines that the additional information of the channel currently being viewed is a digital channel, the controller 150 checks whether there is another physical channel including the selected virtual channel, and if there is another physical channel, the controller 150 has the selected virtual channel. The broadcast signal of another physical channel is tuned to display additional information of the virtual channel on the screen. However, if it is determined that there is no other channel, the analog channel 아날로그 is searched and if it is determined that there is additional information of the selected channel in the analog channel ,, the additional information of the channel in the analog channel 시키고 is displayed on the screen. Display additional information on the screen.

After the additional information of the channel is displayed on the screen through the above process, the broadcast signal of the selected channel is transmitted to the demultiplexer 111 when the digital broadcast signal is demodulated and separated into individual bit strings of video data, audio data, and additional information. The separated video data and audio data are decoded by the video decoder 113 and the audio decoder 115, respectively, and then output through the cathode ray tube CRT and the speaker SP.

When the broadcast signal of the selected channel is an analog channel under the control of the controller 150, the broadcast signal is determined to be an analog broadcast signal and supplied to the image processor 121 and the audio processor 123, respectively. After the video signal is processed to be displayed on the screen, the analog signal is output through the cathode ray tube (CRT), and the audio processor 123 amplifies the audio signal among the analog broadcast signals to a predetermined level to generate the speaker SP. Is output via

2 is a flowchart illustrating a channel search process of a broadcast receiver according to the present invention. This will be described with reference to the channel search process.

First, when power is supplied to the broadcast receiver (step 301), broadcast signals for all selectable channels are received to form an analog channel map and a digital channel map and store them in the memory unit 130 (step 303).

If a channel is selected by the user, it is checked by the controller 150 whether the selected channel is the same channel as the channel of the broadcast signal currently being viewed (step 305), and if it is determined that the channel is not the same channel, the step ( Proceed to 307).

In step 307, if the received channel is searched in the digital channel map and determined to be in the digital channel map (step 309), the additional information of the received digital channel in the digital channel 디스플레이 is displayed on the screen (step 311). If it is determined that the receiving channel is not in the digital channel map, the search is performed in the analog channel map (step 313). If it is determined that the receiving channel is in the analog channel map (step 315), the additional information of the analog channel in the analog channel map is determined. Display on the screen (step 317).

On the other hand, if it is determined in step 315 that there is no analog channel 멥, the controller 150 tunes the selected channel in an analog manner (step 319), and if the tuning is successful (step 321), the step 317 Proceed to) to display additional information of analog channel on the screen.

If it is determined in step 305 that the selected channel is the same channel as the channel currently being viewed, it is determined that the virtual channel of the channel currently being watched is selected to check whether the channel being watched is the digital channel (step 323), where If it is determined that it is not a digital channel, the analog channel map is searched (step 327), and if it is determined that there is additional information of the channel selected in the analog channel ((step 329), the process proceeds to the step 317 and the additional information of the analog channel. Is displayed on the screen.

However, if it is determined in step 329 that the additional information of the virtual channel selected in the analog channel 가 does not exist, the broadcast signal of the digital channel selected digitally is tuned (step 331), and if the tuning is successful (step 333). It is checked whether there is additional information (step 335).

If it is determined in step 335 that there is additional information, the additional information of the virtual channel is displayed on the screen (step 337). If it is determined that there is no additional information, the non-signal additional information is displayed on the screen (step 339).

On the other hand, if it is determined that the digital channel through step 323, it is checked whether there is another physical channel having the selected virtual channel (step 341), and if it is determined that no other physical channel exists, the analog channel 한 is searched After (step 343), if it is determined to exist in the analog channel (step 345), the process proceeds to the step 317 to display additional information of the analog channel on the screen, and if it does not exist in the step 345, the step Proceeding to 339, the non-signal additional information is displayed on the screen.

If it is determined through operation 341 that there are a plurality of other physical channels, the broadcast signal of the first physical channel among the other plurality of physical channels is tuned to display additional information on the selected virtual channel of the first physical channel. Is checked, and it is checked whether or not tuning of other multiple physical channels has been completed (step 349). Here, if it is determined that the program has ended, the program is terminated. If it is determined that the program has not ended, the process proceeds to step 347.

As described above, in the channel search method of the broadcast receiver according to the present invention, the additional information of the channel selected by the user is automatically performed by the analog and digital channel search. It is possible to obtain an effect that can further improve the convenience of the product accordingly.

1 is a diagram showing the configuration of a broadcast receiver to which the present invention is applied.

2 is a flowchart illustrating a channel search process of a broadcast receiver according to the present invention.

<Description of the symbols for the main parts of the drawings>

101: antenna 103: tuner

110: digital broadcast processor 111: demultiplexer

      113: Video Decoder 115: Audio Decoder

120: analog broadcast processing unit 121: video processing unit

123: audio processing unit 130: memory unit

150: control unit

Claims (1)

A method for searching a channel after an analog channel map and a digital channel map is created according to a program and system information protocol, a) receiving broadcast signals for all selectable channels to form and store analog channel maps and digital channel maps; b) checking whether the power is supplied and the channel selected by the user is the same channel as the channel of the previously received broadcast signal; c) If it is determined in step b) that the channel is not the same channel, if the selected channel is searched in the digital channel map and judged to be in the digital channel map, additional information of the selected channel in the digital channel 멥 is displayed on the screen. If the additional information is not found in the digital channel map, searching the analog channel map to determine that the additional information of the selected channel is in the analog channel map, and displaying the additional information of the selected channel in the analog channel map on the screen; d) if it is determined in step c) that the selected channel is not in the analog channel map, if the tuning is successful after analogue tuning of the broadcast signal of the selected channel, displaying analog channel additional information on the screen; e) If it is determined that the channel selected in step b) is the same channel as the channel currently being received, it is checked whether the channel being watched is a digital channel and if it is not a digital channel, if it is in the analog channel 멥, Displaying channel additional information on the channel 에 on a screen; f) If it is determined in step e) that the channel being watched is not in the analog channel 하면, if the tuning is successful after digitally tuning the broadcast signal of the channel being watched, the channel additional information is displayed on the screen. If not successful, displaying no-signal channel additional information on the screen; And g) If it is determined in step e) that the channel currently being received is a digital channel, if it is determined that the selected virtual channel is checked for other physical channels, tuning channel additional information for another physical channel having the selected virtual channel is performed. If the additional information about all the physical channels having the selected virtual channel is completed, if the additional information of all the physical channels is not completed, the next physical channel having the next selected virtual channel tunes the additional information. The channel search method of the broadcast receiver comprising the step of displaying on the screen.