KR20000034298A - Device and method for selecting channels by using a vertical blanking time for television - Google Patents

Abstract

PURPOSE: A device and method for selecting channels by using a vertical blanking time for television is provided so that during a channel selection mode, a user can select only a channel corresponding to the frequency of each broadcasting station by storing the selected channel. CONSTITUTION: A decoder(19) decodes the data such as frequency and name of a broadcasting station, which are transmitted after being encoded with the intermediate frequency amplified by an IF amplifier(3). On a channel selecting mode, a control unit(15) selectees channels from the first to the last through a tuner(2) and judges whether a frequency of a selected channel is the same as a frequency of the data decoded by the decoder(19). If the frequency of the selected channel is the same as the frequency of the data decoded by the decoder(19), the control unit(15) stores the selected channel and displays the channel on CRT(12).

Description

Channel Tuning Device and Method Using Vertical Retrace Period of Television

The present invention relates to a channel tuning apparatus and method using a vertical retrace period of a television. More particularly, in a television having a channel tuning mode for tuning a channel, the channel is selected from an initial channel through a tuner in the channel tuning mode. If the frequency of the channel tuned by the tuner while tuning to the channel is the same as the frequency of the data decoded by the decoder, tune the channel by storing the tuned channel in memory and tuning only the channel of the frequency corresponding to each broadcasting station in the channel tuning mode. The present invention relates to a channel tuning apparatus and method using a vertical retrace period of a television.

1 shows an example of a circuit configuration of a general television in a block diagram.

As shown in FIG. 1, a television (TV) includes an antenna (1), a tuner (2), an IF amplifier (3), a P / S separation unit (4), a voice detector (5), and a voice processor ( 6), audio amplifier 7, speaker 8, image detector 9, image processor 10, CRT driver 11, CRT 12, remote controller 13, receiver 14, controller 15, the OSD generator 16, the mixer 17, and the memory 18 is configured.

The broadcast signal of the airwave is received by the antenna 1, and the broadcast signal received by the tuner 2 controlled by the control unit 15 is tuned. The IF amplification part 3 generally constitutes a chroma IC to a main IC, and amplifies an intermediate frequency (IF) signal output from the tuner 2, and the P / S separation part 4 includes a surface acoustic wave filter for the intermediate. The frequency IF is divided into an image intermediate frequency PIF and an audio intermediate frequency SIF.

The voice detector 5 detects the voice signal from the voice intermediate frequency (SIF), and the voice processor 6 detects the detected voice signal based on the control signal of the controller 15. And voice processing such as volume, and the voice amplifier 7 amplifies the processed voice signal and outputs it to the speaker 8.

The image detector 9 detects an image signal from an image intermediate frequency (PIF), and the image processor 10 detects the detected image signal according to a control signal of the controller 15, such as color, tint, and brightness. Processing is performed to output R (Red), G (Green), B (Blue) and luminance (Y) signals corresponding to the image signal, and the mixer 17 outputs the R, G, B and luminance (Y) signals. And R ', G', B 'and OSD blanking signal Y' generated from the OSD generator 16 by mixing and outputting the OSD generator 16 to the CRT 12 via the CRT driver 11. The image is displayed together with the predetermined OSD pattern data from the.

The remote controller 13 is equipped with a channel tuning mode key for the viewer to adjust the output volume, channel switching, or set the channel tuning mode, and transmits infrared signals to remotely control the whole other apparatus. By converting and outputting the electrical code signal from the receiver 14, the overall apparatus is controlled by the controller 15 according to the electrical code signal.

In the conventional television configured as described above, when the viewer operates the channel tuning mode key of the remote controller 13 to set the channel tuning mode or selects the main menu and then selects the channel tuning mode of the submenu to set the channel tuning mode. The channel is tuned to the initial channel by the tuner 2 by outputting a control signal for tuning the channel from the initial channel to the control unit 15.

Thereafter, the controller 15 determines whether a broadcast signal is input from the channel tuned through the tuner 2, and if the broadcast signal is not input, increases the channel by 1 and then increases the channel through the tuner 2. While tuning, when a broadcast signal is input from the tuned channel, the tuned channel is stored in the memory 18, and it is then determined whether the tuned channel is the final channel.

As a result, when the tuned channel is not the final channel, the controller 15 increases the channel by 1 and then tunes the increased channel through the tuner 2, and when the tuned channel is the final channel, After the channel tuning mode is completed, the main menu is returned.

However, in the conventional television configured and performed as described above, a broadcasting station transmits a broadcast signal at a high frequency so that a multiple (for example, 2 times, 3 times) frequency is also transmitted along with the frequency corresponding to the broadcasting station. Therefore, in the channel tuning mode, there is a problem that the channel of the multiple frequency is tuned together with the channel of the frequency corresponding to the broadcasting station.

Accordingly, the present invention is to solve this problem, in the case of channel tuning mode when the channel is tuned from the initial channel to the last channel through the tuner while the frequency of the channel tuned by the tuner is the same as the frequency of the data decoded by the decoder. It is an object of the present invention to provide a channel tuning apparatus and method using a vertical retrace period of a television for storing tuned channels in a memory to tune only channels of frequencies corresponding to each broadcasting station in the channel tuning mode.

1 is a block diagram showing an example of a circuit configuration of a general television;

2 is a block diagram showing the configuration of a channel tuning apparatus using a vertical retrace period of a television according to an embodiment of the present invention;

3a and 3b is a view for explaining the vertical retrace period according to an embodiment of the present invention,

4 is a flowchart showing the configuration of a channel tuning method using a vertical retrace period of a television according to an embodiment of the present invention.

<Description of the code | symbol about the principal part of drawing>

1: antenna 2: tuner

3: IF amplification unit 4: P / S separation unit

9: Image detector 10: Image processor

11: CRT drive unit 12: CRT

13: remote control 14: receiver

15: control unit 16: OSD generation unit

17: Mixer 18: Memory

19: decoder

In order to achieve the above object, a channel tuning apparatus using a vertical retrace period of a television according to an embodiment of the present invention, after the intermediate frequency signal tuned by the tuner is amplified by the IF amplifying unit, the P / S separation unit The channel tuning mode in which the intermediate frequency and the image intermediate frequency are separated, and the image intermediate frequency separated by the P / S separation unit is detected as an image signal by the image detector and then processed by the image processor to display the image on the CRT. A television comprising: a decoder for decoding data transmitted by being encoded in an intermediate frequency signal amplified by the IF amplifier; When the channel tuning mode is set, the channel tuned by the tuner is judged whether the frequency of the channel tuned by the tuner is equal to the frequency of the data decoded by the decoder while tuning the channel from the initial channel to the final channel through the tuner. If the frequency of the same as the frequency of the data decoded by the decoder characterized in that it comprises a control unit for storing the selected channel and displaying on the CRT.

In order to achieve the above object, a channel tuning method using a vertical retrace period of a television according to an embodiment of the present invention is provided in a television having a channel tuning mode for tuning a channel: when the channel tuning mode is set, the channel N Tuning to the initial channel (S1); Determining whether the frequency of the tuned channel N is equal to the frequency of the decoded data after the channel N is tuned to the initial channel in the step S1; Increasing the channel N by one if the frequency of the channel N tuned in the step S2 is not equal to the frequency of the decoded data (S3); Storing the tuned channel N if the frequency of the channel N tuned in step S2 is equal to the frequency of the decoded data (S4); Displaying the tuned channel (N) stored after the tuned channel (N) is stored in the step (S4) (S5); After the tuned channel N stored in the step S5 is displayed, it is determined whether the tuned channel N is the final channel, and when the tuned channel N is not the final channel, the process returns to step S3. It characterized in that it comprises a step (S6).

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

2 is a block diagram showing the configuration of a channel tuning apparatus using a vertical retrace period of a television according to an embodiment of the present invention.

As shown in FIG. 2, the channel tuning apparatus using the vertical retrace period of the television according to the present invention includes an antenna 1, a tuner 2, an IF amplifier 3, a P / S separation unit 4, Audio detector 5, audio processor 6, audio amplifier 7, speaker 8, video detector 9, video processor 10, CRT driver 11, CRT 12, remote controller 13, a receiver 14, a controller 15, an OSD generator 16, a mixer 17, a memory 18, and a decoder 19.

The decoder 19 encodes the intermediate frequency signal amplified by the IF amplifier 3 and decodes the data (for example, frequency and broadcasting station name) transmitted together, and the controller 15 controls the channel selection mode by the viewer. Is set, the channel is tuned through the tuner 2 from the initial channel to the final channel, and the tuner 2 determines whether the frequency of the channel tuned by the tuner 2 is equal to the frequency of the data decoded by the decoder 19. If the frequency of the channel tuned by) is equal to the frequency of the channel decoded by the decoder 19, the tuned channel is stored in the memory 18 and then displayed to display the tuned channel stored in the memory 18. Output a control signal.

The OSD generator 16 outputs the R ', G', B 'and OSD blanking signals Y' corresponding to the tuned channels stored in the memory 18 by the control signal of the controller 15. (17) and the tuned channel stored in the memory 18 in the CRT 12 via the CRT driver 11 are displayed as OSD pattern data.

3A and 3B are diagrams for explaining the vertical retrace period according to an embodiment of the present invention.

FIG. 3A illustrates a conventional conventional retrace period. As shown in FIG. 3A, a broadcast signal of a general NTSC system moves from an end point of a vertical scan that scans a screen from top to bottom to a start point of the next vertical scan. When the horizontal scan is finished in the vertical blank time, the horizontal synchronization signal for switching to the next horizontal scan and the vertical synchronization signal for transferring to the next vertical scan are sent.

3B is a diagram illustrating a vertical retrace period according to an embodiment of the present invention. As shown in FIG. 3B, when a broadcast station transmits a broadcast signal, data (eg, C) of the vertical retrace period is transmitted. For example, frequency and station name) are sent.

In the channel tuning apparatus using the vertical retrace period of the television according to the embodiment of the present invention configured as described above, the viewer operates the channel tuning mode key of the remote controller 13 to set the channel tuning mode or selects the main menu. When the channel tuning mode is set by selecting the channel tuning mode of the submenu, the control unit 15 outputs a control signal for tuning the channel to the initial channel.

Accordingly, the tuner 2 tunes the channel to the initial channel by the control signal of the controller 15, and the decoder 19 tunes the tuner 2 and then amplifies the channel by the IF amplifier 3. It decodes the data (e.g., frequency, broadcast station name) encoded with the frequency signal and transmitted together.

Next, the controller 15 determines whether the frequency of the channel tuned by the tuner 2 is equal to the frequency of the data decoded by the decoder 19, so that the frequency of the channel tuned by the tuner 2 is determined by the decoder ( If the frequency of the data decoded by 19) is equal to the frequency of the stored data, the tuned channel is stored in the memory 18 and then a control signal for displaying the tuned channel stored in the memory 18 is output.

Accordingly, the OSD generator 16 receives the R ', G', B 'and OSD blanking signals Y' corresponding to the tuned channel stored in the memory 18 by the control signal of the controller 15. By outputting the tuned channel stored in the memory 18 in the CRT 12 via the mixer 17 and the CRT driver 11 as OSD pattern data (e.g., channel and broadcast station name 11 MBC). Is displayed.

Thereafter, the controller 15 determines whether the tuned channel is the last channel, and if the tuned channel is not the final channel, increases the channel by one and tunes the increased channel through the tuner 2, while the tuned channel is tuned. In the case of the last channel, the control unit 15 returns to the main menu after the channel tuning mode is completed.

On the other hand, if the frequency of the channel tuned by the tuner is the same as the frequency of the data decoded by the decoder, the control unit does not display the tuned channel stored in the memory after storing the tuned channel in the memory, the tuned channel It may be configured to determine whether this channel is the last channel and to display the tuned channel stored in the memory as a whole when the tuned channel is the last channel.

4 is a flowchart illustrating a channel tuning method using a vertical retrace period of a television according to an embodiment of the present invention.

When the channel tuning mode is set in FIG. 4, the channel N is tuned to the initial channel in step S1, and the channel N is tuned in step S2 after the channel is tuned to the initial channel in step S1. It is determined whether the frequency of is equal to the frequency of the decoded data.

That is, when the channel selection mode is set by the viewer, the control unit tunes the channel N to the initial channel through the tuner, and then determines whether the frequency of the channel tuned by the tuner is the same as the frequency of the data decoded by the decoder.

If the frequency of the channel N tuned in the step S2 is not the same as the frequency of the decoded data, the channel N is increased by one in step S3, and the frequency of the tuned channel N is decoded. If the frequency is equal to the stored channel (N) in step S4.

That is, when the frequency of the channel (N) tuned by the tuner is not the same as the frequency of the data decoded by the decoder, the control unit increases the channel (N) by 1 and then tunes the increased channel (N) through the tuner. On the other hand, when the frequency of the channel (N) tuned by the tuner is equal to the frequency of the data decoded by the decoder, the tuned channel (N) is stored in the memory.

After the channel N tuned in step S4 is stored, the tuned channel N stored in step S5 is displayed.

That is, after the tuned channel N is stored, the controller outputs a control signal for displaying the tuned channel stored in the memory, and the OSD generator outputs the control signal to the tuned channel stored in the memory. By outputting the corresponding R ', G', B 'and OSD blanking signals (Y'), the tuned channels stored in the memory in the CRT via the mixer and the CRT driver are used to display the OSD pattern data (e.g., channels and broadcasting stations). Name (11 MBC).

When the tuned channel N stored in the step S5 is displayed, it is determined whether the tuned channel N is the last channel in step S6, and the tuned channel N is not the final channel. Returning to S3), if the tuned channel N is the last channel, the channel tuning mode is completed and then the main menu is returned.

That is, after the tuned channel N stored in the memory is displayed, the controller determines whether the tuned channel N is the final channel, and if the tuned channel N is not the final channel, increases the channel N by one. After the channel is tuned, the increased channel is tuned through the tuner. When the tuned channel N is the final channel, the controller returns to the main menu after the channel tuning mode is completed.

On the other hand, the channel tuning apparatus and method using the vertical retrace period of the television according to the present invention is not limited to the NTSC method, but may be configured in the DAL method, SECAM method, etc. If various data such as the current time and broadcast time are sent to the outside, various data such as the current time and broadcast time may be decoded and displayed by the decoder of the television.

According to the configuration and operation of the channel tuning apparatus and method using the vertical retrace period of the television according to the embodiment of the present invention described above, tuning is performed by the tuner while tuning the channel from the initial channel to the final channel through the tuner in the channel tuning mode. If the frequency of the channel is equal to the frequency of the data decoded by the decoder, the tuned channel is stored in the memory to tune the channel so that only the channel of the frequency corresponding to each broadcasting station can be tuned in the channel tuning mode. .

Claims (2)

After the intermediate frequency signal tuned by the tuner 2 is amplified by the IF amplifier 3, the P / S separation unit 4 separates the audio intermediate frequency and the image intermediate frequency, and the P / S separation unit 4 In a television having a channel selection mode in which an image intermediate frequency separated from the &lt; RTI ID = 0.0 &gt;) is detected as an image signal by the image detector 9 and then processed by the image processor 10 to display an image on the CRT 12. : A decoder (19) for decoding the data transmitted by being encoded in the intermediate frequency signal amplified by the IF amplifier (3); And When the channel tuning mode is set, whether or not the frequency of the channel tuned by the tuner 2 is equal to the frequency of the data decoded by the decoder 19 while tuning the channel through the tuner 2 from the initial channel to the final channel. And a control unit 15 for determining and storing the tuned channel and displaying it on the CRT 12 when the frequency of the channel tuned by the tuner 2 is equal to the frequency of the data decoded by the decoder 19. And a channel tuning apparatus using the vertical retrace period of the television. For televisions with channel tuning mode for tuning channels: Tuning the channel N to an initial channel when the channel tuning mode is set (S1); Determining whether the frequency of the tuned channel N is equal to the frequency of the decoded data after the channel N is tuned to the initial channel in the step S1; Increasing the channel N by one if the frequency of the channel N tuned in the step S2 is not equal to the frequency of the decoded data (S3); Storing the tuned channel N if the frequency of the channel N tuned in step S2 is equal to the frequency of the decoded data (S4); Displaying the tuned channel (N) stored after the tuned channel (N) is stored in the step (S4) (S5); And After the tuned channel N stored in the step S5 is displayed, it is determined whether the tuned channel N is the final channel, and when the tuned channel N is not the final channel, the process returns to step S3. And a step (S6). The channel tuning method using the vertical retrace period of the television.