KR19980056950A - Automatic Tuning and Memory Channel Display Control Method of TV and VRS System - Google Patents

Abstract

The present invention relates to an automatic channel selection and memory channel display control method of a TV and VSI system, and automatically tuned and stored in a TV or VSI system having an automatic channel matching function for automatically tuning and storing a channel having a broadcast signal. This is for displaying all memory channels that are displayed on the OSD screen.

To this end, the present invention provides a function selection guide screen when a function selection key is pressed and waits for a function selection by a user; If the automatic channel matching mode is selected in the first step, it is determined whether or not the broadcasting signal is from the two channels, and the operation of storing the channel with the broadcasting signal and displaying all the memory channel numbers with the OSD is increased by one channel. Performing a second step repeatedly; When the operation of the second step is completed, the function selection guide screen is displayed again, and when the function selection key is pressed, the operation is terminated.

Description

Automatic Tuning and Memory Channel Display Control Method of TV and VRS System

The present invention relates to a method for controlling automatic channel selection and memory channel display of a TV and VSI system, and more particularly, to a TV or VSI system having an automatic channel matching function for automatically tuning and storing a channel having a broadcast signal. It is possible to display the memory channel which is automatically tuned and stored on the on-screen display (hereinafter referred to as OSD), so that up to which channel the TV or TV tuner channel of the user is tuned and stored. This is to inform the user so that it can be easily recognized.

In general, in order to perform the automatic channel fitting function, the conventional VSI includes a phase locked loop (PLL) IC, a frequency tuning circuit, a local oscillator, a frequency synthesis circuit, and the like, through the antenna as in the embodiment of FIG. A tuner unit 10 for selecting a desired channel from an RF signal by a frequency tuning voltage, and a PIF detector for detecting and outputting an intermediate frequency (PIF) of an image signal for a broadcast signal from a channel tuned by the tuner unit ( 20) and a video signal processor 30 and a video signal output unit 40 for separating and outputting the synchronization of the video signal from the IF output signal of the PIF detector and outputting the output signal to a desired video output terminal.

Then, the PLL IC of the tuner unit 10 is controlled to variably output the frequency tuning voltage while detecting the presence / absence of a synchronization signal output from the video signal processing unit 30 to determine the presence / absence of a broadcast signal. When selected, the microprocessor 70 is configured to control a series of channel selection operations that execute automatic fine tuning (AFT) by window search to set an optimum tuning voltage to end the channel tuning operation.

In addition, a key input unit for interfacing the microprocessor and the user, an OSD processor 50 for generating a character according to the OSD control signal of the microprocessor and supplying it to the video signal processor 30, and storing channel data and the like. It comprises a memory unit 60 for.

In the conventional automatic channel matching operation performed in VSI of this configuration, as shown in the flowchart of FIG. 2, when the function selection key included in the remote controller or the set is pressed, the channel matching is performed on the OSD screen. It will go through a series of OSD display outputs, which are automatically tuned to the channel. have.

That is, the microprocessor 70 first determines whether a function selection key is input by scanning a key input unit, and when the function selection key is pressed, select clock alignment, scheduled recording / cancellation, channel alignment, or other functions as shown in Table 1 below. The function selection guide screen can be displayed on the OSD and awaiting a selection operation by the user.

TABLE 1

At this time, if 3 of the digits are input by the user, the antenna input or general broadcasting and general broadcasting → cable broadcasting or cable broadcasting can be selected as shown in Table 2 below. Again waiting for the user to make a selection.

TABLE 2

In the channel alignment guide screen display state, the microprocessor 70 checks the key operation state again to determine whether to select the automatic channel alignment mode, and when the user presses the digit key 2 of the key input unit to select the automatic channel alignment mode. The initial channel value for automatic channel search is set to 2 to determine whether there is a broadcast signal of the corresponding channel.

At this time, if it is determined that there is a corresponding broadcast signal, the corresponding channel is stored in the memory and the channel value previously displayed in the OSD or the digitron is deleted, and the channel is automatically deleted with the currently set channel number as shown in Table 3 below. Message is displayed on the OSD screen.

TABLE 3

After that, the channel value is increased by 1, and the channel search and storage operation is continued until a certain value is exceeded (in this case, the case of 69 is described as an example), and when the value is exceeded, the function selection guide screen is displayed. When the function selection key is inputted once again, the operation can be completed.

However, in the automatic channel matching function, when the function selection key included in the remote control or the set is pressed, the OSD screen outputs a channel alignment → automatic channel alignment → automatic channel alignment progress guide message on the OSD screen. In the OSD screen, such as automatically adjusting channels, starting from channel 2 initially set, and tuning up and down by one channel, it is not easy to check how many channels the consumer tunes to. In order to check the automatic channel selection and the memorized channel by the function, it was troublesome because the user could recognize the channel only when selecting the channel at each confirmation.

Therefore, the present invention has been created to solve the above problems, the present invention is a TV or VSI system with an automatic channel matching function that can automatically tune and store a channel with a broadcast signal, which is automatically tuned and stored By displaying the memory channel on the OSD screen, the user can tell the user how many channels of the TV or V tuner tuner are tuned and stored so that the user can easily recognize the TV and VSI. It is an object of the present invention to provide a method for controlling automatic channel selection and storage channel display in a system.

In order to achieve the above object, the present invention provides a function selection guide screen by pressing a function selection key and waiting for a function selection by a user; If the automatic channel matching mode is selected in the first step, the operation determines whether the broadcasting signal is present or not from the two channels so that only the channel with the broadcasting signal is memorized and the memory channel number is displayed on the OSD by one channel. Performing a second step repeatedly; When the operation of the second step is completed, the function selection guide screen is displayed again, and when the function selection key is pressed, the third step of terminating the operation is performed. to provide.

1 is a block diagram schematically showing some components of a conventional VSI system

2 is a flowchart illustrating an automatic channel selection and memory channel display method of a conventional VSA system.

FIG. 3 is a flowchart illustrating a method for controlling automatic channel selection and memory channel display in a BS system according to an exemplary embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

10: tuner unit 20: PIF detection unit

30: video signal processing unit 40: video signal output unit

50: OSD (On Screen Display) processing unit

60: memory 70: microprocessor

Hereinafter, a method for controlling automatic channel selection and memory channel display of a TV and VSI system according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 3 is a flowchart illustrating a method for controlling automatic channel selection and memory channel display in a TV and VSI system according to an embodiment of the present invention. In the first step of the drawing, a function selection guide screen is displayed by pressing a function selection key. Step (S31-S32) and the step (S33-S34) to determine whether the automatic channel matching mode is selected while determining whether the user selects the desired function using the OSD screen.

The second step is performed when the automatic channel fitting mode is selected in the first step. The step (S35-S36) of determining whether a broadcast signal is present from the initial two channels (S35-S36), and if there is a broadcast signal, determines the corresponding channel. (S37-S38) and when the memory operation is finished or there is no broadcast signal as a result of the determination, the channel search memory and the OSD are increased up to the last channel. The display operation is repeatedly performed (S39-S40).

Next, when the operation of the second step is completed, the third step includes a step of launching the function selection guide screen again (S41), and ending the operation (S42) when the function selection key is pressed on the OSD screen. It is shown.

The operation of the present invention as described above is as follows.

First, the automatic channel matching and memory function is performed when the user presses a function selection key provided on the remote controller or the set. In the present invention, when the function selection key is pressed in the microprocessor 70, the above-described OSD screens are described in Tables 1 to 3. As in the use example of Table 3, the first and second steps of the function selection → automatic channel matching → automatic channel matching are displayed.

At this time, in the message display state such that the channel is automatically adjusted, the microprocessor 70 performs channel auto-tuning starting from the initial channel 2 and goes up by one channel, and automatically remembers the channel with the broadcast signal. When the automatic channel search and memory operation is performed, if there is a broadcast signal in the channel currently being searched, the microprocessor 70 stores the corresponding channel with the broadcast signal in the memory unit. Thereafter, an operation of displaying all channel numbers stored in the memory unit 60 (channel numbers previously searched and stored and channel numbers currently searched and stored) on the OSD screen is performed as shown in Table 4 below.

TABLE 4

In addition, the OSD display operation is repeatedly displayed every time a channel having a broadcast signal is searched, so that an external user is currently performing the automatic channel matching and storage function or how many channels are automatically searched and stored. Make it easy to see.

The above automatic channel matching and memory function is repeatedly performed from the initial value of 2 channels to the last channel while increasing by 1 channel, and returns to the function selection screen. When the function selection key is pressed, the third step of terminating all operations is performed. Will be implemented.

According to the present invention as described above by displaying all the storage channels automatically tuned and stored in the TV or VSI system with automatic channel matching function that can automatically tune and store the channel with a broadcast signal on the OSD screen, It provides the advantage that the user can easily check the channel being searched or the channel stored in search.

Claims (1)

Pressing the function selection key brings up the function selection guide screen and selects the automatic channel matching mode in step 1 of waiting for the user to select a function. The second step of repeating the operation to the last channel while increasing the operation of memorizing a channel and displaying all the memorized channel numbers by the OSD by one channel, and when the operation of the second step is completed, the function selection guide screen is displayed again. And the third step of terminating the operation when the function selection key is pressed.