KR0155682B1 - Broadcasting channel searching method - Google Patents

Abstract

The present invention relates to a method for searching a broadcast channel in a broadcast receiver, comprising: a key input step of introducing a command for searching for a broadcast channel carrying a broadcast signal, and an initial channel for storing a currently input channel number and setting it as an initial channel; A set step, a channel scan step of scanning all channels while displaying the channel corresponding to the tuning data by detecting the presence of a synchronization signal by sequentially increasing the channel one by one from the initial channel, and a broadcast in which the synchronization signal is detected. Including the channel number display step of displaying the channel number on the OSD, the desired channel can be tuned directly by looking at the displayed channel number so that channels not stored in the channel memory can be easily tuned.

Description

Broadcast channel search method

1 is a flow chart showing a broadcast channel search method according to the present invention.

FIG. 2 is a system diagram for explaining the flowchart diagram of FIG. 1. FIG.

* Explanation of symbols for main parts of the drawings

10: remote control transmitter 20: micom

30 tuner 40 on-screen display

50: mixing part

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a broadcast channel search method in a broadcast receiver, and more particularly, to a broadcast channel search method capable of displaying and searching a channel having a broadcast by scanning all broadcast channels.

In a conventional broadcast receiver, a method of tuning a broadcast channel may be divided into several methods.

In the case of a broadcast receiver that does not have an automatic program function or a channel memory function, a channel that is tuned into a broadcast channel is manually tuned directly or a channel is sequentially increased to tune a desired channel.

On the other hand, in the case of a broadcast receiver equipped with an automatic program or a channel memory function for storing a channel with a broadcast with a single key operation, the channel that is not needed after storing all channels for which the broadcast is received by the automatic program is deleted. Use to erase or use the channel memory function to tune to and store the desired channel on which the broadcast has been carried out, and to tune to the memorized channel. As a result, the station is directly tuned.

At this time, in a broadcast receiver with an automatic program or channel memory function, if a channel with a broadcast is known, the broadcast channel can be easily tuned. Otherwise, the stored program can be changed again using the automatic program from the beginning. Channels that are not remembered or memorized were tenkeys, and there was a hassle of checking them one by one.

In order to overcome the above problems, the present invention is to provide a broadcast channel search method for displaying all the channels with a broadcast for a predetermined time after scanning all channels with a broadcast and displaying the channel number using the OSD There is this.

In order to achieve the above object, the broadcast channel search method of the present invention is a key input step for introducing a command for searching for a broadcast channel carrying a broadcast signal, and an initial channel for storing the current channel number and setting it as an initial channel. A set step, a channel scan step of sequentially scanning the channel corresponding to the tuning data by detecting the presence of a synchronization signal by sequentially increasing the channel by one channel, and scanning all channels while displaying a predetermined time, and a broadcast in which the synchronization signal is detected. And a channel number display step of displaying the channel number on the OSD.

Hereinafter, a broadcast channel searching method according to the present invention will be described with reference to the accompanying drawings.

1 is a flowchart showing a broadcast channel search method according to the present invention.

According to FIG. 1, the key input step is made of step S1, the initial channel set step is made of steps S2 to S3, the channel scan step is made of steps S5 to S9, and the channel display step is made to steps S10 to S13. Corresponding.

2 is a system diagram for explaining a flowchart of the broadcast channel search method of FIG.

According to FIG. 2, when a broadcast channel scan key set in the remote control transmitter (also called a remote controller) 10 is input, key data corresponding to this broadcast channel scan mode is transmitted to the microcomputer 20. FIG.

The microcomputer 20 receives key data of the remote control transmitter 10 and controls the tuner 30 and the on-screen display unit 40.

The tuner 30 inputs tuning data corresponding to a frequency band of a channel on which a broadcast is performed from the microcomputer 20 and tunes with a high frequency signal (also called RF: Radio Frequency signal) received through an aerial line (ANTENNA: ANT). When synchronized with data, the control signal is transmitted to the microcomputer 20 through the synchronization signal control signal output terminal 31.

The on-screen display 40 (hereinafter referred to as OSD) 40 inputs data output from the microcomputer 20 to generate a text signal.

The mixer 50 mixes the broadcast signal output from the tuner 30 and the text signal output from the OSD 40 under the control of the microcomputer 20 and outputs the mixed signal to the display apparatus (not shown).

The operation of the system for searching the broadcast channel of FIG. 2 will be described in detail with reference to the flowchart of FIG.

The microcomputer 20 checks whether data corresponding to the channel scan key is input from the remote control transmitter 10 (step S1), and if key data is input, the currently tuned channel data is stored as RAM (RAM: Random Access Memory). Is stored (step S2), and the initial channel is set (step S3).

At this time, the microcomputer 20 transmits the prescribed broadcast frequency, that is, channel tuning data, for the channel to the tuner 30 (step S2).

The tuner 30 inputs a strobe signal of the strobe output terminal 21 of the microcomputer 20, a clock signal of the clock terminal 22, and tuning data of the data output terminal 23, and receives the high frequency received through the aerial line ANT. When the signal and the tuning data are synchronized, the control signal of the control signal output terminal 31 is output to the microcomputer 20 (step S5), the selected channel data is stored in the RAM (step S6), and the screen of the display device is displayed. The selected channel is displayed for 5 seconds (step S7).

It checks whether the tuned channel is the last channel (step S8), and if it is not the last channel, feeds back the channel data by increasing the channel data by one.

The tuned channel is the last channel, and the channel data memorized when the scan key data is input is read from the RAM and tuned to the channel (step S10).

In the OSD 40, data corresponding to the channel number of the clock signal of the strobe signal clock terminal 25 of the strobe signal output terminal 24 and the synchronization signal stored in the RAM of the data output terminal 26 is received from the microcomputer 20. Input, generate a channel number and display it on the display device through the mixing unit 50 (step S11), determine whether the channel number display time has passed 8 seconds (step S12), and clears the OSD if 8 seconds have passed. (Step S13).

As described above, in the broadcast channel search method according to the present invention, when the channel scan key data is input by the key input means, all channels are displayed while scanning the entire channel, and the broadcast channel is displayed after the scan. All channel numbers that are present are displayed on the display using the OSD, and the channels not stored in the channel memory can be easily tuned by viewing the displayed channel numbers and tuning the desired channels directly.

Claims (1)

A key input step of receiving a command for searching for a broadcast channel carrying a broadcast signal, an initial channel set step of storing a current channel number and setting it as an initial channel, and one channel from the initial channel of the initial channel set step The channel scan step of scanning all channels while displaying the channel corresponding to the tuning data by detecting the presence of the synchronization signal while increasing the sequence sequentially, and displaying the channel number containing the broadcast where the synchronization signal was detected by tuning to the original channel. And a channel number displaying step.