KR0147981B1 - Method for displaying progressing state on auto tuning - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method for displaying channel progress status during automatic channel tuning in a video device having a channel automatic tuning function. Tuning to the frequency of the lowest channel to be tuned when the tuning key signal is input; Detecting whether a synchronization signal is input to the tuned channel and storing fine tuned channel information when the synchronization signal is input; Calculating and displaying the currently tuned channel amount for all channels as a percentage; A method for displaying channel progress status during channel auto tuning, which includes repeating the frequency tuning process until the channel search is terminated by the user's key operation or until the channel search is completed while increasing the frequency of the channel to be tuned. to provide.

Description

How to display progress status when channel auto tuning

1 is a schematic block diagram of a video cassette recorder suitable for carrying out the present invention.

2 is a flowchart illustrating a process of displaying a progress state in automatic channel tuning according to a preferred embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

10: key input unit 20: microcomputer

30: storage unit 40: tuner unit

50: synchronization separation unit 60: image processing unit

70: OSD unit

The present invention relates to a display method for channel automatic tuning of a video device, and more particularly, to a method for displaying channel progress during automatic channel tuning so that a user can easily recognize the tuning progress through an OSD screen.

In general, automatic channel tuning of a video device sequentially scans from a Very High Frequency (VHF) low band to an Ultra High Frequecy (UHF) band and recognizes a channel to which a synchronization signal is input as a broadcast signal. By saving only the channel that exists, it is a function that provides the user with convenience when switching channels.

In the case of performing the conventional channel automatic tuning function as described above, the user is reminded by displaying a text using the On Screen Display (OSD) function.

However, the channel auto-tuning function is a function that memorizes a corresponding channel when there is an input of a broadcast signal while sequentially tuning a plurality of channels, and it takes boring to the user because it takes a relatively long time to complete the operation. In addition, there is an uncomfortable problem in which the user cannot recognize how much channel selection is currently in progress.

Accordingly, the present invention has been made to solve the above-described problems of the prior art, an object of the present invention is to proceed in the automatic channel tuning to display the channel tuning progress in the percentage conversion so that the user can know the channel automatic tuning It is to provide a status display method.

Features of the present invention to achieve this object. CLAIMS 1. A display method for automatic channel tuning in a video device, the method comprising: tuning to a frequency of a lowest channel to be tuned when an automatic tuning key signal due to a user's key operation is input; Detecting whether a synchronization signal is input to the tuned channel and storing fine tuned channel information when the synchronization signal is input; Calculating and displaying the currently tuned channel amount for all channels as a percentage; Repeating the frequency tuning process until the channel search is terminated by the user's key operation until the channel search is terminated or the channel search is terminated while increasing the frequency of the channel to be tuned.

1 is a schematic block diagram of a video cassette recorder suitable for carrying out the present invention. As shown in the figure, the video cassette recorder employed in the present invention includes a key input unit 10, a microcomputer 20, a storage unit 30, a tuner unit 40, a synchronous separation unit 50, and an image processing unit 60. ), The OSD unit 70.

In the figure, the key input section 10 is provided as a means for the user to perform a desired operation of the video cassette recorder. The key input section 10 includes a plurality of keys including a channel automatic tuning key and the like. Output the key signal.

In addition, the microcomputer 20 controls the overall operation of the video cassette recorder in response to the key signal from the key input unit 10, and provides a tuning signal for tuning a channel when the channel automatic tuning key signal is input from the key input unit 10. And a recording control signal for storing the channel information when the synchronization detection signal is input from the synchronization separation unit 50 to the storage unit 30.

In addition, the microcomputer 20 stores the tuned channel information, compares the total number of channels to be scanned with the number of channels tuned and stored up to now, converts them into percentages, and displays the current channel tuning progress in the percentages. The corresponding character control signal is output to the OSD unit 70.

Also. The storage unit 30 is a means for storing channel information tuned based on the recording control signal from the microcomputer 20.

Meanwhile, the tuner unit 40 tunes the broadcast high frequency signal induced by the antenna based on the tuning signal from the microcomputer 20 and outputs the received video signal.

The sync separator 50 separates the sync signal from the video signal output from the tuner 40 and outputs the sync detection signal to the microcomputer 20 when the sync signal is detected.

In addition, the image processor 60 processes the image signal received by the tuner 40 as a displayable signal and outputs the same.

Finally, the OSD unit 70 generates a text signal based on the text control signal from the microcomputer 20 to display the text on the screen, and outputs the text signal by mixing with the video signal from the video processor 60.

Next, a process of displaying the progress status during automatic channel tuning according to the preferred embodiment of the present invention in the video cassette recorder including the above-described configuration unit will be described in detail with reference to the flowcharts of FIGS. 1 and 2.

First, the microcomputer 20 determines whether the channel automatic tuning key signal resulting from the user's channel automatic tuning key operation is applied from the key input unit 10 (step 200), and if applied, the microcomputer 20 enters the channel automatic tuning mode. Perform

For channel automatic tuning, the microcomputer 20 applies a tuning signal to the tuner unit 40 to tune the channel of the lowest frequency in order to start scanning from the channel of the lowest frequency (step 202).

Next, the tuner unit 40 outputs a video signal received by being tuned to a channel corresponding to the tuning signal from the microcomputer 20, and the sync separator 50 outputs a video signal output from the tuner unit 40. The synchronous signal is separated and transmitted to the microcomputer 20 to transmit the synchronous detection signal.

At this time, the microcomputer 20 determines whether the synchronization signal is input as the synchronization detection signal (step 204).

Then, when the synchronization signal is detected in the step 204, the channel fine tuning is performed between the microcomputer 20 and the tuner unit 40 (step 206), and a write control signal is applied to the storage unit 30 to finally receive the synchronization signal. Information about the channel tuned to is stored (step 208).

Next, in order to indicate the current channel tuning progress, the percentage of the channel tuned and stored in the step 208 is advanced among the channels to be scanned as a percentage (100 * total channels / currently scanned channels). (206).

Then, the microcomputer 20 applies the text control signal to the OSD unit 70 to display the channel tuning progress based on the percentage calculated in step 206 (step 212).

Then, the OSD unit 70 generates a text signal representing the percentage calculated in the step 206 based on the text control signal from the microcomputer 20, and mixes it with the video signal from the image processor 60 to output the text signal. do.

At this time, the user can check the current channel tuning state through the monitor, and thus, it is possible to predict whether the channel automatic tuning is terminated at what time and determine whether to continue channel tuning according to the situation.

Next, it is checked whether the user presses the channel tuning key of the key input section 10 again to terminate channel tuning, and further checks whether there is a channel to be scanned to continue tuning the next channel (step 214). If there is no input of the channel tuning key signal for termination or the channel to be scanned remains, the flow returns to step 202 to scan the next channel to continue the automatic tuning function.

On the other hand, in step 214, if the channel tuning key signal for channel tuning termination is input or there is no channel to be scanned, the OSD screen is removed and the channel automatic tuning function is terminated (step 216).

On the other hand, in the embodiment of the present invention is displayed on the monitor screen by using the OSD function to display the channel selection progress state to the user, it can be modified by using other display means.

As described above, according to the present invention, the user can easily check and recognize the tuning progress by the percentage displayed by the OSD character on the monitor screen during channel automatic tuning.

Claims (1)

CLAIMS 1. A display method for automatic channel tuning in a video device, the method comprising: tuning to a frequency of a lowest channel to be tuned when an automatic tuning key signal due to a user's key operation is input; Detecting whether a synchronization signal is input to the tuned channel, and finely adjusting the synchronization signal to store tuned channel information; Calculating and displaying the currently tuned channel amount for all channels as a percentage; Proceeding state of automatic channel tuning, including repeating the frequency tuning process until the channel search is terminated by the user's key operation or until the channel search is completed while increasing the frequency of the channel to be tuned. Display method.