KR19990026320A - VSI system with channel confirmation function using audio - Google Patents

Abstract

The present invention relates to a VSI system having a channel checking function using audio, wherein when a broadcasting confirmation key and a channel number are input when the VSI system is set to a playback mode, the video / video is continuously played. By changing only the audio switch of the audio signal processing means to the high frequency mode so that the audio signal of the broadcast channel is output in line with the video signal currently being reproduced, the user can selectively control the audio switch to stop the tape play operation and receive the current signal. This is to check the program of the channel.

To this end, the present invention includes a key input unit having a broadcast confirmation key for setting a broadcast channel confirmation mode; A video / audio signal processing unit which is one-chip so as to easily change a path of an audio signal and a video signal by only changing data during playback using serial data; If the broadcast confirmation key and channel number are input during tape playback, the serial data is changed while tape playback is continued, and the audio output selection switch of the video / audio signal processing unit is set to the RF mode for a certain period of time. And a microprocessor incorporating a series of audio switch control programs to control the control.

Description

VSI System with Channel Check Function Using Audio

The present invention relates to a VSI system that can identify a TV broadcast channel by using an audio signal during tape playback. More specifically, when the broadcast system has a play mode set, the broadcast confirmation key and the channel number are inputted. With the tape playing continuously, only the audio switch of the video / audio signal processing means is changed to the high frequency mode so that the audio signal of the broadcast channel is output in line with the video signal currently being played. The present invention relates to a VSI system having a channel identification function using audio to selectively control an audio switch to check a program of a channel currently being received.

In general, the VSA system is connected to an antenna input terminal and an RF output terminal as shown in FIG. 1, and includes an RF modulator, a tuner circuit, an IF detector, and the like for an image of a broadcast signal from a channel tuned in the tuner circuit. RF / tuner / IF unit 10 which detects the intermediate frequency (IF) of the signal or converts it into a signal suitable for the cathode ray tube of the TV and outputs the video signal and audio signal in the tape playback mode or the recording mode. A video head 61 for recording, a preamplifier 60 and an audio head 62 are provided.

And an audio output selection switch 20 for switching the broadcast signal or the tape reproduction signal of the RF / tuner / IF unit according to a PB mode or an RF mode operation controlled by a microprocessor and the audio output selection switch selected from the audio output selection switch. The video / audio signal processor 30 separates the video / audio signal and outputs it to the line output terminal.

The microprocessor 50 controls the switching operation of the audio output selection switch according to the operation mode while controlling playback and recording operations through the deck mechanism, and a key input unit 40 for interfacing the microprocessor with a user. Consists of including.

In the tape playback operation performed in VSI of this configuration, when the playback mode is selected through the key input unit 40, the microprocessor 50 drives the deck mechanism, and at the same time, the audio output selection switch 20 and the video / audio By outputting both control signals PB EE to the signal processor 30 at a logic high level, the video and audio output selector switches are set to the playback mode, so that the video head 61 and the audio head of the deck mechanism ( The video and audio playback signals played back at 62) are output to the outside through the line output terminal, so that the tape playback signals can be viewed through the TV.

In the tape reproducing operation as described above, the microprocessor recognizes a state in which the reproducing stop key is input or the end sensor is detected, thereby releasing the tape reproducing mode.

In addition, when the tape is played back, the microprocessor checks whether a play stop key or a pause key is input, and executes a control operation by a key input signal only when it corresponds to it, and does not stop the operation by another channel increase / decrease key. .

Therefore, if the channel increase / decrease key is input from an external user in the state of executing the play mode as described above, the microprocessor cannot determine the corresponding key input state. Therefore, in the conventional VSI, to check the broadcast channel during the play mode. In this case, first, the play mode is canceled by pressing the play stop key and then the channel increase / decrease key is used to confirm the desired broadcast.

On the other hand, in the case of VSI with picture in picture function, if you select the PIP function while watching the signal being played on the tape, there was a method of checking the program of the broadcasting channel that is currently broadcasting through the sub picture. There have been problems such as the addition of a lot of external circuits.

Accordingly, the present invention has been made to solve the above problems, and the present invention provides a broadcast confirmation key for setting a broadcast channel confirmation mode in a key input means, and changes the data during playback using serial data. It is equipped with one-chip video / audio signal processing means to easily change the path of the video signal, and when the VSI system is set to playback mode, the video continues to play tape when the broadcast confirmation key and channel number are input. By changing only the audio switch of the audio signal processing means to the high frequency mode, the audio signal of the broadcasting channel is outputted along with the video signal currently being reproduced, so that the user can selectively control the audio switch to check the program of the current reception channel. Identify channels using one audio It is an object of the present invention to provide a VSI system having a function.

In order to achieve the above object, the present invention provides a key input unit including a broadcast confirmation key for setting a broadcast channel confirmation mode; A video / audio signal processing unit which is one-chip so as to easily change a path of an audio signal and a video signal by only changing data during playback using serial data; If the broadcast confirmation key and channel number are input during tape playback, the serial data is changed while tape playback is continued, and the audio output selection switch of the video / audio signal processing unit is set to the RF mode for a certain period of time. Provided is a VSI system having a channel identification function using audio including a microprocessor in which a series of audio switch control programs are controlled.

Figure 1 is a block diagram showing a part of the configuration of the conventional VSIS system shown

Figure 2 is a block diagram showing a partial excerpt of the configuration of VSI system according to the present invention

3 is an operation flowchart for explaining a channel identification function using audio of a VSI system according to the present invention;

* Explanation of symbols for main parts of the drawings

10: RF / tuner / IF section 20: Audio output selection switch

30A: video / audio signal processing unit 40A: key input unit

50A: microprocessor 60: preamplifier

61: video head 62: audio head

Hereinafter, a configuration of a VSI system having a channel checking function using audio according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a block diagram showing a partial configuration of a VSI system according to the present invention. The RF / tuner / IF unit 10, the video head 61, the preamplifier 60, and the audio head 62 are shown in FIG. Is provided in the same manner as the conventional case, and is configured by adding a broadcast confirmation key (K1) to the key input unit (40A) that can set the broadcast channel confirmation mode even during playback.

The video / audio signal processing unit 30A, which has one-chip audio output selection switch and video / audio signal processing IC, can easily change the path of the audio signal and the video signal only by changing the data during playback using serial data, and tape playback. If the broadcast confirmation key and the channel number are input, the serial data is changed while the tape is being played back, and the audio output selection switch of the video / audio signal processing unit is set to the RF mode for a certain time and then returned to its original position. The microprocessor 50A incorporating a series of audio switch control programs is shown.

FIG. 3 is a flowchart illustrating an overall operation flow of the microprocessor of FIG. 2 in order to explain a channel identification function using audio of a VSI system according to the present invention. Steps S311-S313, a second step (S314, S315) of determining whether a channel number is input while outputting a guide message when a broadcast confirmation key is input as a result of determination, and an RF when a channel number to be checked is input as a result of the determination. The third step (S316-S317) of setting the selection channel by controlling the / tuner / IF unit and changing the serial data, setting the audio output selection switch of the video / audio signal processing unit to the RF mode and checking the time; As a result of the time check, a fourth step (S318, S319) is performed to control the audio output selection switch to return to the PB mode when a certain time elapses. This indicates an audio switch control program.

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

First, when the tape playback mode is selected (Y branch of S311), the microprocessor 50A sets the audio output selection switch of the video / audio signal processor 30A to PB mode by using the serial data (S312). In the state where the tape play mode is being executed, the microprocessor 50A checks the key input state to determine whether the broadcast confirmation key is input (S313).

In this case, when the broadcast confirmation key is input as a result of the determination of the first step (Y branch of S313), a guide message for inputting a channel number to be checked is output (S314), and the key input is waited while determining whether the channel number is input (S315). .

If the channel number to be checked in the state of waiting for key input is input (Y branch of S315), the RF / tuner / IF unit 10 is controlled to set the selected channel while the tape is being played (S316) and the channel desired by the user. The RF / tuner / IF unit 10 allows the RF / tuner to be received by changing the serial data and setting the audio output selection switch of the video / audio signal processor 30A to the RF mode (S317). The audio signal of the channel received from the / IF unit 10 is controlled to be output through the audio output selection switch of the video / audio signal processing unit 30A to the speaker of the TV, and it is checked whether a predetermined time has elapsed (S318). do.

Therefore, the video signal played back from the tape goes to the line output terminal through the video output selection switch, and the audio signal of the broadcasting channel selected by the user goes out to the line output terminal through the audio output selection switch. The signal is output, but the speaker outputs the audio signal of the channel tuned by the tuner.

When a predetermined time elapses as a result of the time counting (Y branch of S318), the microprocessor 50A sends serial data to the video / audio signal processing unit 30A again to control the audio output selection switch to the home position in the PB mode (S319). In addition, the video signal and the audio signal reproduced from the tape are controlled to exit to the line output terminal through the video output selection switch and the audio output selection switch of the video / audio signal processing unit 30A, respectively, and all the operations are terminated.

Therefore, at this time, the video signal played back from the tape goes to the line output terminal through the video output selector switch, and the audio signal of the broadcast channel selected by the user is cut off from the audio output selector switch. Since the line output terminal, the tape playback signal is normally output from the TV screen and the speaker.

According to the present invention as described above, when the broadcast system is set in the playback mode, when the broadcast confirmation key and the channel number are input, only the audio switch of the video / audio signal processing means is in high frequency mode while the video tape is continuously played. Since the audio signal of the broadcasting channel is outputted along with the video signal currently being reproduced, the user can selectively check the broadcasting channel program by controlling the audio switch without stopping the tape playing operation. .

Claims (2)

A key input unit having a broadcast confirmation key for setting a broadcast channel confirmation mode; A video / audio signal processing unit which is one-chip so as to easily change a path of an audio signal and a video signal by only changing data during playback using serial data; If the broadcast confirmation key and channel number are input during tape playback, the serial data is changed while tape playback is continued, and the audio output selection switch of the video / audio signal processing unit is set to the RF mode for a certain period of time. 24. A VSI system having a channel checking function using audio including a microprocessor having a series of audio switch control programs which are controlled to be controlled. The method of claim 1, wherein the microprocessor comprises: a first step of determining whether a broadcast confirmation key is input when the tape is being played; A second step of determining whether a channel number is input while outputting a guide message for inputting a channel number to be checked when a broadcast confirmation key is input as a result of the determination of the first step; If the channel number to be checked is inputted as a result of the determination of the second step, the audio / tuner / IF unit is controlled to control the RF / tuner / IF unit to set the selection channel, and the serial data is changed to select the audio output of the video / audio signal processing unit. Setting a switch to the RF mode and counting a predetermined time; A V having a channel checking function using audio, wherein the audio switch control program includes a fourth step of controlling the audio output selection switch to return to the PB mode when a predetermined time elapses as a result of the counting in the third step. Sial system.