KR19980049135U - VSI system with automatic channel switching - Google Patents

Abstract

The present invention relates to a VSI system having an automatic channel switching function. In the related art, when selecting a broadcasting system and a line system as an external signal source through a key input unit, a TV broadcasting system is selected after pressing a line and TV broadcasting key input. It was difficult to avoid the hassle of manipulating the keys by selecting the up / down keys.

The present invention provides a microcomputer 12 which switches to a broadcasting system mode and performs channel tuning when the channel key input of the key input unit 11 is present. A switch unit 15 for selecting a line and a broadcast system signal under control of a tuner, a tuner and eye unit 14 for providing a broadcast system signal to the switch unit 15, a line input terminal for providing a line system input, and a reception unit. SUMMARY OF THE INVENTION An object of the present invention is to provide a VSI system having a function of automatically switching a broadcast channel, which is configured to include a channel memory 13 storing a channel.

Description

VSI system with automatic channel switching

The present invention relates to a VSI system having a broadcast channel automatic switching function to receive a broadcast signal at the same time when the broadcast signal system is received when the broadcast signal system is received from the broadcast signal. By pressing the channel up / down key such as the remote control transmitter at the time, it is possible to automatically tune the broadcasting channel so that the trouble of selecting the line system and the broadcasting system by the switch operation is avoided.

The VSI system uses a remote control transmitter for performing various functions, and the remote control transmitter is equipped with many more function keys and ten keys than the key button switches provided on the set key side.

In one example, the conventional VSI system associated with this system has shown this as in FIG.

Here, a tuner 34 for receiving a regular broadcast signal from an antenna 33 of a VSI system and performing channel tuning, and a phase for controlling a phase locked loop (PLL) of the tuning signal provided from the tuner 34. The lock loop circuit 35, the microcomputer 32 for controlling the VSI system, the OSD part 41 for generating the OSD screen, and the like are provided.

The system also includes a VSI system memory 42, a key input unit 31 for operating various keys together with a remote control transmitter, a deck 36 for recording / playback deck operation, and a drive motor on the deck 36 side. The servo circuit 37 for controlling the light, the RF converter 38, the video block 39 for video signal processing, the TV receiver 40, and the like are formed.

In the conventional VSI system, when a user selects a video / audio signal source input from an external line and a video / audio signal provided by a broadcasting system, a user inputs a line system or a broadcasting system signal through a key input unit 31 such as a remote control transmitter. When selected, the microcomputer 32 recognizes this and controls the line / broadcast switch to selectively connect them to the back of the system circuit.If the system is currently keyed in to receive the line-based signal, the user switches to the broadcast-based signal. To select a line or broadcast signal, press the switch.

Therefore, in the related art, when the user switches from the current line system mode to the broadcast system mode, the user has to press the input selection switch and select a channel that he / she wants to see.

An object of the present invention is to automatically switch the line input to the broadcast input and to the channel stored in the channel memory when the user selects a channel using the remote control transmitter in the line signal reception mode in the system to improve the above problems. By allowing them to receive the key, they can avoid the cumbersome key operation in such a system.

In particular, the present invention provides a microcomputer for converting the broadcasting mode to the broadcasting system mode and performing channel tuning when the system has channel key input in the key input unit so as to realize the object of the above example, and the line and broadcasting system under the control of the microcomputer. A broadcasting channel comprising a switch section for selecting a signal, a tuner and an eye section for providing a broadcast system signal to the switch section, a line input terminal for providing a line system input, a channel memory storing a reception channel, and the like It is characteristic of VSIAL system with automatic switching function.

Hereinafter, more specific features of the present invention will be understood by describing the same in detail with the accompanying drawings.

1 is a circuit block diagram of a typical VCR (Video Cassette Recorder) system

2 is a system circuit block diagram of the present invention

3 is an embodiment of a broadcast channel switching processing program of the present invention

** Explanation of symbols on the main parts of the drawing **

11.Key Input 12.Microcomputer

13. Channel Memory 14. Tuner & Eye part

15. Switch section 16. Audio / video processing section

100. Broadcasting channel switching program

Figure 2 shows an excerpt of the main circuit of VSI system having a broadcast channel automatic switching function according to the present invention.

Here, if there is a channel key input of the key input unit 11, the microcomputer 12 switches to the broadcasting system mode in the current line mode and performs channel tuning, and selects the line and broadcasting signal under the control of the microcomputer 12. A switch unit 15, a tuner and eye unit 14 for providing a broadcast system signal to the switch unit 15, a line input terminal for providing a line system input, and a channel memory 13 storing a reception channel. ), And so on.

Here, reference numeral 16 is a video / audio processor for video / audio signal processing.

When the user presses a channel key provided in the key input unit 11 when the user switches from the current line system mode to the broadcast system mode as shown in FIG. 2, the microcomputer 12 immediately returns to the broadcast system mode if the current mode is a line system mode. Connect the switch section 15.

Therefore, the user can switch to the broadcasting system mode only by pressing the channel key in the line system mode. Then, when the up / down key of the key input unit 11 is pressed, the microcomputer 12 recognizes this and enters the channel memory 13. The stored channel data is provided to the tuner and the PIF part 14, and the tuner and the PIF part 14 scan the memorized channel by the frequency synthesis method.

In this case, when the user presses the up key, if the channels stored in the channel memory 13 are 2, 5, 6, 7, 9, 11, 13 channels, the channel scanning is performed while the channels are increased or decreased one by one. When is stopped on a channel, that channel is automatically received.

Meanwhile, the above operation is performed by the microcomputer 12 together with the broadcast channel switching processing program 100 as shown in FIG. 3, which checks whether the system is currently line-based broadcast. Check if the up / down key is pressed (steps 101 and 102), and if the user presses the up / down key thereafter, the switch unit 15 is connected from the line to the broadcasting system, and the channel stored in the channel memory is scanned to tune the tuner and the eye. It is provided to the unit 14 (step 103), whereby the user maintains the broadcast signal reception mode of the predetermined channel stored in the channel memory (steps 104 and 105).

This invention devises the convenience of key operation that can receive a certain channel by switching the line system mode to the broadcasting system mode by pressing the channel up / down key without additional key operation when the system is in the line system mode. You can have.

Claims (1)

In a VSI system including a key input unit, a micro computer, a tuner, and an IF unit, a micro computer which switches to the broadcasting system mode and performs channel tuning when the channel input is input by the key input unit 11 ( 12), a switch unit 15 for selecting a line and a broadcast system signal under the control of the microcomputer 12, a tuner and eye unit 14 for providing a broadcast system signal to the switch unit 15, and a line. A VSI system having an automatic channel switching function, comprising a line input stage for providing system input, and a channel memory 13 for storing a reception channel.