KR0168317B1 - Sub-screen sound broadcasting auto-tunning circuit and method in television receiver - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television receiver having a picture in picture (PIP) function for simultaneously outputting a main screen and a sub-screen. Particularly, the present invention includes a sub-screen music broadcasting automatic tuning key for a viewer to perform music broadcasting on a sub-screen. The present invention relates to a sub-screen music broadcasting automatic tuning circuit of a television receiver and to a method for automatically searching and tuning a music broadcast of a sub-screen channel when a corresponding key is pressed for viewing.

The present invention further includes a pilot signal detection unit 30 configured to detect a pilot signal from the audio signal of the sub picture broadcast and apply the detection signal to the microprocessor 11; It is determined whether the PIP mode and the sub picture music broadcasting automatic tuning mode are selected by the signal from the key input unit 9, and when the modes are selected, the current sub picture by the signal from the pilot signal detection unit 30 is selected. It is determined whether the pilot signal is included in the audio signal of the channel, and if the pilot signal is not included in the audio signal of the current picture channel, the sub-tuner 3b is controlled to increase the sub picture channel by one step. In addition, it is determined whether the pilot signal is included in the sub-screen audio signal by the signal from the pilot signal detector 30, and the pilot of the music broadcast is included in the voice signal of the tuned current screen channel. When there is a signal, it is characterized by outputting the music broadcast of the current screen channel.

Description

Sub-screen music broadcasting automatic tuning circuit of television receiver and its method

1 is a schematic block diagram showing an internal configuration of a general television receiver.

2 is a block diagram of a television receiver equipped with automatic sub-screen music broadcasting means of the present invention.

3 is a flow chart for executing the sub-screen music broadcasting automatic tuning method of the television receiver of the present invention.

* Explanation of symbols for main parts of the drawings

1 antenna 2 RF amplifier

3a: main tuner 3b: subtuner

4: IF amplification unit 5: P / S separation unit

6: voice detector 7: image detector

9: key input unit 10: channel memory

11 microprocessor 12 OSD generator

19: synchronization signal detection unit 21: stereo sound processing unit

22: audio amplifier 23: image processing unit

24 mixer 25 CRT drive unit

26: main / second voice switching unit 27: screen multi-processing unit

30: pilot signal detector

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television receiver having a picture in picture (PIP) function for simultaneously outputting a main screen and a sub-screen. Particularly, the present invention includes a sub-screen music broadcasting automatic tuning key in a key input unit so that a viewer can broadcast music on a sub-screen. The present invention relates to a sub-screen music broadcasting automatic tuning circuit of a television receiver that enables a user to automatically search for and tune a music broadcast of a sub-screen channel when a corresponding key is pressed for viewing.

Recently, with the advent of cable TV, various broadcasting services are being implemented. Accordingly, viewers can select and watch their favorite music broadcasting.

In this situation, a lot of viewers who like music broadcasts are being created. When they watch TV, they mainly select and watch music broadcasts.

1 is a block diagram schematically showing the configuration of a general television receiver having a PIP function.

In the drawing, reference numeral 1 denotes an antenna, 2 denotes an RF amplifying unit for amplifying a radio frequency (RF) signal received through the antenna 1, and 3a and 3b denote the RF under control of a microprocessor 11 which will be described later. A main and sub-tuner for generating and outputting an IF (Intermediate Frequency) signal by selecting an RF signal of a broadcast to be watched from among the various RF signals from the amplifier 2.

Further, reference numeral 4 is an IF amplifying unit for amplifying the IF signal output from the main and sub-tuners 3a and 3b, and 5 is an image intermediate frequency signal PIF in the IF signal output from the IF amplifying unit 4. ) Is a P / S separation unit for separating an audio intermediate frequency signal (SIF), 6 is an audio detector for detecting an audio signal from the SIF signal, and 7 is an image detector for detecting an image signal from the PIF signal.

Reference numeral 9 denotes a key input unit for inputting various commands such as selecting a desired channel by the viewer, 10 denotes a channel memory in which predetermined channel data is stored, and 11 denotes an entire circuit according to a signal from the key input unit 9. The controlling microprocessor.

Reference numeral 12 denotes an R (Red), G (Green), B (Blue) signal and OSD blanking signal (Y ') corresponding to guide letters and figures in the control state in accordance with a control signal from the microprocessor (11). OSD output unit.

Reference numeral 21 denotes a voice signal output from the voice detector 6 and processes a voice signal such as a base, treble, and volume according to a control signal from the microprocessor 11. In the case where the audio signal is a signal, the audio processing unit performs processing, and 22 is an audio amplifying unit which amplifies the audio signal processed by the audio processing unit 21 and outputs it to the speaker.

Further, reference numeral 23 denotes a color, tint, brightness, etc. according to a control signal from the microprocessor 11 for the image signal output from the image detector 7. The image processing unit outputs R (Red), G (Green), and B (Blue) signals corresponding to the image signal, and 24 denotes R, G, B signals and OSD blanking signals Y output from the OSD generator 12. ') And a mixer for mixing and outputting the R, G, and B signals output from the image processor 23, and 25, a CRT driver for driving the CRT based on the R, G, and B signals output from the mixer 24. to be.

The conventional television receiver as described above operates only the main tuner 3a when the viewer watches only the broadcast of the main screen, but operates the two tuners by operating the sub-tuner 3b when watching the sub-screen with the PIP.

Reference numeral 26 denotes a main / sub audio switching unit for switching the main and sub audio signals under the control of the microprocessor 11 during the PIP operation, and 27 denotes a screen multi-processing based on the video signal of the main and sub screens. A screen multiple processing unit for switching the main and sub video signals under the control of the processor 11.

In other words, the main and sub-screens can be switched by the viewer's key input unit 9.

In the case of PIP broadcasting, it is common to output the main voice to the speaker and the sub voice to the headphones.

In the conventional television receiver as described above, in order to watch a general broadcast on a main screen and a music broadcast on a sub screen, a viewer operates a key of the key input unit 9 to select a music broadcast. There has been a problem in that the channel for outputting music broadcasting must be found while changing the broadcasting channel.

On the other hand, viewers who frequently watch music broadcasts often watch general broadcasts on the main screen while watching music broadcasts on the subscreen using headphones. In this case, in order to watch music broadcasts on the subscreen, Changing the channel several times makes you feel uncomfortable searching for music.

The present invention has been made in view of the above-described problems of the prior art, and when a viewer wants to watch a music broadcast in a sub-screen broadcast, the user presses a music broadcast tuning key provided in the key input unit while the PIP is selected to broadcast the sub-screen. It is an object of the present invention to provide a sub-screen music broadcasting automatic tuning circuit of a television receiver that automatically changes the channel to a channel of music broadcasting so that viewers can easily tune into sub-screen music broadcasting.

Another object of the present invention is to change the broadcast of the sub-screen to the channel of the music broadcast by pressing the music broadcast selection key provided in the key input unit when the PIP is selected when the viewer wants to watch the music broadcast in the broadcast of the sub-screen Disclosure of the Invention The present invention provides a method for automatically tuning sub-screen music broadcasting of a television receiver that facilitates viewers to select sub-screen music broadcasting.

The sub-screen music broadcasting automatic tuning circuit of the television receiver of the present invention for achieving the above object is provided with a sub-screen music broadcasting automatic tuning key in a key input unit when the viewer presses the corresponding key. Emit an infrared code signal; When the PIP mode and the sub-screen music broadcasting automatic tuning mode are selected by the key input unit, the pilot signal detection unit is configured to detect whether the pilot signal is included in the audio signal of the sub-screen and apply the detection signal to the microprocessor. It is provided with; The microprocessor may control the sub-tuner to perform channel-up step by step until there is a detection signal of the pilot signal from the pilot signal detection unit when the sub picture music broadcasting automatic tuning mode is selected.

The sub-screen music broadcasting automatic tuning method of the television receiver of the present invention for achieving the above another object has a PIP function and includes a key input unit, a microprocessor for controlling the entire apparatus, and a pilot signal in a sub-screen audio signal. In the television receiver comprising a pilot signal detection unit for detecting whether the detection signal is applied to the microprocessor and a synchronization signal detection unit for detecting whether the video signal of the sub-picture contains a synchronization signal and applying the detection signal to the microprocessor. The first step of determining whether the PIP mode is selected by the signal from the key input unit, the second step of determining whether the sub-screen music broadcasting automatic tuning mode is selected by the signal from the key input unit, the sub-screen music broadcasting automatic tuning mode Subscreen by signal from pilot signal detector when selected A third step of determining whether the pilot signal is included in the voice signal of the current channel; and in the third step, if the pilot signal is not included in the voice signal of the current screen channel, A fourth step of upgrading up, a fifth step of determining whether the current picture channel tuned by the signal from the synchronization signal detection unit is an effective channel with a broadcast signal, and an active channel with the current picture channel being a broadcast signal In the case of the sixth step of judging whether the pilot signal is included in the sub-screen audio signal by the signal from the pilot signal detection unit, and the pilot of the music broadcast in the voice signal to the voice signal of the selected current screen channel And a seventh step of outputting a music broadcast of the current picture channel when there is a signal.

According to the sub-screen music broadcasting automatic tuning circuit of the television receiver of the present invention and the method, when the viewer wants to watch the music broadcasting on the sub-screen, pressing the PIP key and the sub-screen music broadcasting automatic tuning key of the sub-screen Since the broadcast is automatically changed and tuned to a music broadcast, viewers can conveniently search for and tune into the music broadcast.

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

2 is a block diagram of a television receiver equipped with automatic sub-screen music broadcasting means of the present invention.

As shown, other configurations except for the sub-screen music broadcasting automatic tuning means according to the present invention are the same as those of FIG. 1 as described above, in the following description, the same components as in FIG. Shall be.

In the drawings, reference numeral 1 denotes an antenna, 2 denotes an RF amplifier, 3a and 3b denotes a main and sub tuner, 4 denotes an IF amplifier, 5 denotes a P / S separation unit, 6 denotes a voice detector for detecting a voice signal, and 7 denotes An image detector for detecting a video signal, 9 is a key input unit, 11 is a microprocessor for controlling the entire circuit, 12 is an OSD generator, 21 is a voice processor for processing the audio signal output from the voice detector 6, 22 is a voice amplifier which amplifies the processed voice signal and outputs the same to the speaker.

Further, reference numeral 23 denotes an image processor which processes the image signal output from the image detector 7 and outputs R, G, and B signals, 24 denotes a mixer, 25 denotes a CRT driver, and 26 denotes a main / second voice switching. Part 27 is a screen multiple processing unit.

In addition to the above general configuration, the television receiver of the present invention detects the pilot included in the audio signal of the sub-screen broadcast and applies the detected signal to the microprocessor 11 to the broadcast signal of the effective channel. A synchronization signal detection unit 19 is further configured to apply a detection signal to the microprocessor 11 when detecting the synchronization signal necessarily included in the video signal.

In addition, the key input unit 9 is provided with a sub-screen music broadcasting automatic tuning key to emit a corresponding infrared code signal when a viewer presses the corresponding key. The microprocessor 11 has a sub-screen music broadcasting automatic tuning mode. When selected, the sub-tuner 3b is controlled from the pilot signal detection unit 30 until a detection signal of the pilot signal is detected, thereby channeling up the sub-screen channel step by step.

When the viewer selects the PIP mode and the sub-screen music broadcasting automatic tuning mode by using the sub-screen music broadcasting automatic tuning circuit of the present invention configured as described above, the sub-screen channel of the music broadcasting is automatically selected. The method of searching for and selecting the channel will be described with reference to the flowchart of FIG. 3.

First, the microprocessor 11 determines whether it is in the PIP mode by the signal from the key input unit 9 (first step, S1).

When the PIP key of the key input unit 9 is pressed, the corresponding signal is input to the microprocessor 11 to perform PIP operation. Therefore, the microprocessor 11 determines whether the PIP mode is selected by the signal from the key input unit 9. You can judge.

Next, the microprocessor 11 determines whether the sub picture music broadcasting automatic tuning mode is selected by the signal from the key input unit 9 (second step, S2).

When the sub-screen music broadcasting automatic tuning key of the key input section 9 is pressed, the corresponding signal is input to the microprocessor 11, so the microprocessor 11 automatically selects the sub-screen music broadcasting automatic tuning by the signal from the key input section 9. It may be determined whether the mode is tuned.

When the sub picture music broadcasting automatic tuning mode is selected in the above step, the microprocessor 11 determines whether the pilot signal is included in the voice signal of the current picture channel by the signal from the pilot signal detector 30. (Step 3, S3).

At present, music broadcasting transmits a pilot signal to the voice signal. In addition, when the pilot signal is included in the audio signal of the sub-screen, the pilot signal detector 30 detects the signal and applies the signal to the microprocessor 11.

Accordingly, the microprocessor 11 may determine whether the pilot signal is included in the voice signal of the current screen channel by the signal from the pilot signal detector 30. That is, it may be determined whether the broadcast of the current screen channel is a music broadcast.

Next, in the third step, when the pilot signal is not included in the audio signal of the current sub picture channel, the microprocessor 11 controls the sub tuner 3b to up the sub picture channel by one step (up). 4th step, S4).

If the pilot signal is not included in the audio signal of the sub picture protection, the sub picture channel is upgraded one step to search for the next channel because the broadcast of the current sub picture channel is not a music broadcast.

The microprocessor 11 then determines whether the current picture channel selected by the signal from the synchronization signal detection unit 19 is a valid channel with a broadcast signal (step S5).

Since the synchronization signal detection unit 19 detects an image signal of the current picture channel and applies the detection signal to the microprocessor 11, the microprocessor 11 generates a signal by the signal from the synchronization signal detection unit 19. It is possible to determine whether or not the video signal of the sub picture channel has a synchronization signal. That is, it may be determined whether the current picture channel is an effective channel having a broadcast signal.

In this step, when the current sub picture channel is an effective channel having a broadcast signal, the microprocessor 11 determines whether the pilot signal is included in the audio signal of the sub picture broadcast by the signal from the pilot signal detection unit 30. (Step 6, S6).

The voice signal of the current music broadcast necessarily includes a pilot signal as described above. In addition, since the pilot signal detector 30 detects the pilot signal in the audio signal of the sub picture broadcast and applies the signal to the microprocessor 11, the microprocessor 11 may detect the pilot signal from the pilot signal detector 30. It is possible to determine whether the pilot signal is included in the audio signal of the sub picture broadcast by the signal of.

If there is a pilot signal in the audio signal of the selected current picture channel, the music broadcast of the current picture channel is output (step S7).

If the pilot signal is included in the audio signal of the sub picture broadcast, the channel is stopped because the broadcast of the current channel is a music broadcast, and the music broadcast of the current channel is output. At this time, if the pilot signal is not included in the voice signal, the process returns to the fourth step and the channel is increased one step to repeatedly perform the fourth and fifth operations.

Among the above-described steps, the operation of the fifth step is not necessarily executed. That is, even after performing the operation of the fourth step, the same result can be obtained even if the operation of the fourth step is performed.

As described above, the sub-screen music broadcasting automatic tuning circuit of the television receiver according to the present invention and a method thereof allow the viewer to watch a general broadcast on the main screen and a music broadcast on the sub-screen. Pressing the sub-screen music broadcasting auto tuning key automatically changes the sub-screen broadcasting channel to the channel of the music broadcasting.

Therefore, the present invention will have an effect that the viewer can easily tune to the sub-screen music broadcasting.

The present invention is not limited only to the embodiments described, and it will be apparent to those skilled in the art that various changes and modifications can be made by those skilled in the art without departing from the spirit and scope of the invention. Should fall within the scope of the claims.

Claims (3)

A key input unit 9 having a PIP function, a microprocessor 11 for controlling the entire apparatus, and a synchronization signal detector 19 for detecting a synchronization signal included in an image signal and applying a detection signal to the microprocessor 11. In the television receiver comprising a), the sub-screen music broadcasting automatic tuning key is provided in the key input unit 9 so as to emit the infrared code signal when the viewer presses the corresponding key; When the PIP mode and the sub picture music broadcasting automatic tuning mode are selected by the key input unit 9, it is detected whether the pilot signal is included in the audio signal of the sub picture and the detection signal is applied to the microprocessor 11. A pilot signal detector 30 is further provided; When the sub picture music broadcasting auto-tuning mode is selected, the microprocessor 11 controls the sub tuner 3b until the sub signal channel is detected from the pilot signal detector 30 to detect the sub picture channel. A sub picture music broadcasting automatic tuning circuit of a television receiver, characterized in that channeling is performed step by step. It has a PIP function and detects whether the pilot signal is included in the key input unit 9, the microprocessor 11 for controlling the entire apparatus, and the audio signal of the sub-screen, and applies a detection signal to the microprocessor 11. In the television receiver comprising a pilot signal detection unit 30 and a synchronization signal detection unit 19 for detecting whether a synchronization signal is included in the video signal of the sub-screen and applying the detection signal to the microprocessor 11, the key input unit in the television receiver. A first step of determining whether the PIP mode is selected by the signal from (9); a second step of determining whether the sub-screen music broadcasting automatic tuning mode is selected by the signal from the key input unit 9; A third step of judging whether the pilot signal is included in the audio signal of the current picture channel by the signal from the pilot signal detection unit 30 when the tuning mode is selected; In the third step, when the pilot signal is not included in the voice signal of the current sub picture channel, the fourth step of controlling the sub-tuner 3b to up the sub picture channel by one step, the synchronization signal detector A fifth step of determining whether the current picture channel tuned by the signal from 19 is an effective channel with a broadcast signal; and the pilot signal detector 30 when the current picture channel is an effective channel with a broadcast signal. A sixth step of judging whether the pilot signal is included in the sub-screen audio signal by the signal from the sub-screen audio signal, and if the voice signal of the tuned current screen channel has the pilot signal of music broadcasting in the voice signal. And a seventh step of outputting the music broadcast of the screen channel. The method of claim 2, wherein after performing the operation of the fourth step, the operation of the sixth step is performed without determining whether the selected channel is an effective channel.