KR19990043345A - How to select output device of composite television - Google Patents

Abstract

The present invention relates to a composite television, and more particularly, to an output device of a video image signal. In general, when a wake-up time is recorded on a television, a television broadcast is played at wake-up time, and when a wake-up time is recorded on a video tape, a VCR is played at the wake-up time. Accordingly, in the present invention, when a wake-up time is recorded and recorded on the composite television, the VCR is played when a video tape is inserted into the VCR during the wake-up time. A method for selecting an output device of a composite television is presented.

Description

How to select output device of composite television

The present invention selects a video signal output device at the wake-up time by recording and recording the wake-up time using a composite television. In particular, when a video tape is inserted into the deck of the VCR, the video tape of the VCR is played and the video tape is recorded on the deck of the VCR. The present invention relates to a method for selecting an output device of a composite television that selects a television broadcasting channel and plays a television broadcasting if the is not inserted.

In general, the TVCR, which is a composite television, is an integrated type of a TV (Television) and a Video Cassette Recorder (VCR), and is supplied with a single power supply and is controlled by a system control (hereinafter referred to as Syscon). ) And a timer microcomputer (hereinafter referred to as timer [Timer]) that controls the entire system of TVCR. Each component is operated, and recording and playback of television broadcast signals, recording and playback of other cassette tapes, As a device used for broadcast recording, reservation recording, and absence recording of a channel, an AC bias method with low noise is adopted because there is no residual magnetic field due to a bias magnetic field even when recording on a cassette tape. The recording of the audio signal is relatively narrow in frequency range of 20-20000 Hz, and the phase relationship is not a problem. This being done the alternating-current bias method because. However, the frequency modulation (FM) recording method has been adopted for recording video signals because its frequency range is wide, about 0-4 MHz, and strict phase characteristics are required to faithfully reproduce waveforms. On the other hand, recording a television signal using a VCR is to record a control signal for generating an audio signal, a video signal of a television, and various control signals at the time of reproduction at different positions of the video tape. The configuration of the VCR for recording each of the above signals on a video tape is as follows.

1 is a block diagram of a recording unit of a VCR for recording a television signal on videotape. The configuration for recording the audio signal of the television, the configuration for recording the video signal, and the configuration for recording the control signal are divided. The recording apparatus is provided with an audio signal processing unit 1 for receiving an audio signal input from a television or the like and processing the signal into a type of signal suitable for recording on magnetic tape. An audio signal recording unit comprising an additional oscillator 2 and an audio head 3 for recording the audio signal output from the oscillator 2 on magnetic tape; A composite video signal processor 4 for IF amplification and Y / C separation processing of a composite video signal input from a television, etc., and a luminance signal processor for FM modulation and processing the luminance signal output from the composite video signal processor 4 above; 5) and an FM modulator 6, a color signal processor 7 and a low pass converter 8 for performing low-pass conversion on the color signal output from the composite video signal processor 4, and the FM converter 6 above. A video recording unit comprising a mixing unit 9 for mixing the luminance signal output from the low frequency conversion unit 8 and a color signal output from the low pass conversion unit 8, and a video head 10 for recording the video signal mixed in the mixing unit 9; A vertical synchronous signal processing unit 11 for processing a vertical synchronous signal input from a television or the like, a countdown 12 for downgrading the vertical synchronous signal input from the vertical synchronous signal processing unit 11 to 1/2, and And a control recording section composed of a control head 13 for recording a control signal capable of generating various control signals at the time of reproduction of the videotape by means of the countdown 12 signal.

FIG. 2 is a diagram relating to a recording state of a video tape recorded by the recording apparatus of FIG. When the video tape reproduces the audio signal recorded in the longitudinal direction and the recorded video tape at a position corresponding to the video signal recorded in the edge musque manner in the longitudinal direction on the entire tape and the video signal recorded at the upper end of the tape, A control signal recorded in the longitudinal direction of the tape is recorded to generate a control signal capable of performing a convenient function or the like.

The present invention relates to a method for reproducing a videotape recorded by the above method, and an object of the present invention is to reserve and record a morning wakeup time in a composite television to a deck of a VCR included in the wakeup time. The present invention provides a method for selecting a composite television output device that plays back a VCR when a video tape is inserted and selects a television broadcast channel so that a television broadcast can be played if a video tape is not inserted into the deck of the VCR.

1 is a block diagram of a recording apparatus of a general VCR.

2 is a diagram for explaining a recording state of a video tape;

Figure 3 is a block diagram schematically showing an output device selection device of a complex television according to the present invention

4 is a flowchart illustrating a method for selecting an output device of a composite television according to the present invention.

* Explanation of symbols for main parts of the drawings

100: tuner circuit section 110: intermediate frequency IC section

120: chroma IC unit 130: color signal driver

140: Winner 150: Timer

160: remote controller 170: VCR Y / C IC unit

180: sheath cone 200: signal recording unit

200a: head amplifier IC 200b: video head

200c: Audio processing IC unit 200d: Audio head

200e: control amplifier 200f: control head

Hereinafter will be described in detail with reference to the accompanying drawings for the configuration and operation of the embodiment for achieving the above object of the present invention.

3 is a block diagram of an apparatus for selecting an output device of a composite television according to the present invention.

The present invention provides a high frequency amplifying unit for amplifying a high frequency signal, which is a composite video signal received from an antenna, a mixing unit for converting an input signal amplified from the high frequency amplifying unit and a local oscillation frequency from a local oscillating unit to convert to an intermediate frequency and the mixing unit. A tuner circuit section 100 composed of a local oscillation section for supplying a signal for frequency conversion to the apparatus; An intermediate frequency IC unit 110 connected to the tuner circuit unit 100 and amplifying and processing an intermediate frequency signal which is a complex video signal applied from the tuner circuit unit 100; A chroma IC unit 120 connected to the intermediate frequency IC unit 110 and performing color demodulation processing on a composite video signal applied from the intermediate frequency IC unit 110; The color signal driver 130 and the color signal driver 130 which are connected to the chroma IC unit 120 and perform a driving operation to display the RGB output color signal of the chroma IC unit 120 on the water pipe 140. An image tube 140 on which an image signal is displayed;

On the other hand, the remote controller 160 having a button for switching on and off the power of the composite television; A timer (150) for applying a control signal to the chroma IC unit (130) and the sheath cone (180) when the on-change signal of the power is applied from the remote controller (160); A scicon 180 that interfaces with the timer 150 and generates a control signal necessary for the operation of the VCR; A video head 200b for reading a video signal recorded on a video track of a video tape; An audio head 200d for reading out an audio signal recorded on an audio track of a videotape; A control head 200f for reading a control signal recorded on a control track of the video tape; A head amplifier IC unit 200a connected to the video head and amplifying and outputting a video signal applied from the video head 200b; An audio processing IC unit (200c) connected to the audio head (200d) for improving output characteristics of an audio signal applied from the audio head (200d); A control amplifier 200e connected to the control head 200f and amplifying a signal for a morning wake-up applied from the control head 200f; It is composed of a VCR Y / C IC unit 170 which detects and demodulates the video and audio signals applied from the head amplifier IC unit 200a and the audio processing IC unit 200c and applies them to the chroma IC unit 120. do.

Referring to FIG. 3, first, a method mainly used for receiving a broadcast signal using the tuner circuit unit 100 is a frequency synchronization method (FS), and the FS method uses a timer for each channel. When a user inputs a reference frequency corresponding to the user and selects a broadcast channel, the tuner circuit unit 100 receives the broadcast by transmitting the reference frequency of the corresponding channel as data. Here, in more detail about the components of the tuner circuit unit 100, the high-frequency signal received from the antenna is characterized by the characteristic impedance of the feeder (Feeder) through the input circuit (not shown) of the tuner circuit unit 100 and the high frequency amplification unit The input impedance is matched and output to the high frequency amplifying unit, and the high frequency amplifying unit increases the gain of the received high frequency signal, improves selectivity, and prevents image disturbance. In addition, the S / N ratio is improved, and the local oscillation frequency output from the local oscillator is prevented from being radiated to the antenna to affect other receivers. The signal amplified by the high frequency amplification unit and the frequency output from the local oscillator are input to a mixing unit, and the mixing unit mixes the high frequency signal and the local oscillation unit frequency to generate an intermediate frequency corresponding to the difference between two frequencies. And print it out. In addition, the intermediate frequency IC unit 110 having the intermediate frequency output from the tuner circuit unit 100 as an input may amplify the applied intermediate frequency to increase sensitivity and increase selectivity to increase image output. In addition, the image signal output from the intermediate frequency IC unit 110 is input to the chroma IC unit 120 and processed as a signal suitable for displaying a composite video signal on the water pipe 140, the chroma IC unit ( The RGB color signal processed and output by the color signal 120 is performed to display the RGB color signal from the color signal driver 130 on the water pipe 140.

The above is a block diagram illustrating a process of displaying a composite video signal transmitted from a broadcasting station on a receiving tube. Hereinafter, a method of selecting a composite television output device according to the present invention is first switched on and off to the remote controller 160. When the button is provided and switched from above, the timer 150 controls the block diagram related to the television system, and the ciscon 180, which receives the control signal through the interface with the timer 150, controls the VCR set. .

The video head 200b reads the video signal recorded on the video track of the videotape, and the video signal read from the video head 200b is amplified by the head amplifier IC unit 200a. The audio head 200b reads the audio signal recorded on the audio track of the video tape, and the audio signal read from the audio head 200b is applied to the audio processing IC unit 200c and processed as a signal suitable for output. do. The output signals of the head amplifier IC unit 200a and the audio processing IC unit 200c are applied to the VCR Y / C IC unit 170, demodulated, and then output to the chroma IC unit 120, thereby receiving a water pipe 140. ) Is displayed. The control head 200f reads a control signal for controlling the video and audio signals recorded on the control track of the video tape, amplifies the control signal from the control amplifier 200e, and outputs the control signal to the sheath cone 180. On the other hand, when the wake-up time is recorded in the composite television composed of the blocks as described above, the wake-up time recorded in the reservation is stored in the ypyrom (not shown) of the timer 150, and the wakeup time stored in the ypyrom is a timer. The current time and the set time are counted from 150, and if the scheduled recorded wake-up time counted from the same as the current time is outputted, the broadcast signal is output. Apply the control signal first. The ciscon 180 receiving the control signal applies a control signal to the signal reproducing unit 200 to insert a video tape into a deck unit (not shown) through the video, audio, and control heads 200b, 200d, and 200f. Check if it is

When the video tape is inserted into the deck part from the above, the signal reproducing unit 200 reads the video, audio, and control signals of the video tape and processes the signal, and then the control signal is transferred to the VCR Y / C IC through the sheath cone 180. Applied to the unit 170, the video / audio signal is directly applied to the VCR Y / C IC unit 170. Therefore, the video audio control signal applied to the VCR Y / C IC unit 170 is applied to the chroma IC unit 120, demodulated into an RGB color signal, and displayed on the receiving tube 140. On the other hand, when no video tape is inserted into the deck, the timer 150 applies a control signal to the tuner circuit unit 100, the intermediate frequency IC unit 110, and the chroma IC unit 120 to receive the selected channel. And display at 140.

4 is a flowchart illustrating a method for selecting an output device of a complex television according to the present invention. First, the flowchart is a step of switching off the power of the complex television (S100), and a wake-up time searched by searching for a wake-up time when the complex television is turned off. Power-up switching step (S300), the power-on switching step (S300) for switching on the power if the wake-up time from the wake-up time check step (S200), and the power-on switching step (S300) If there is a video tape on the deck of the VCR, there is a video tape check step (S400), and if there is a video tape from the video tape playback step (S500) and the video tape, and if there is a video tape, If there is no video tape from the checking step (S400), selecting a TV channel (S700), and selecting a channel when the channel is selected from the channel selecting step (S700). And television broadcasting output step (S800) such that the channel is broadcast, a step (S600) to determine the switching off power to the power button input.

Referring to the flow chart of the method of selecting a composite television output device made as described above, the power-off switching step (S100) is a state in which the power of the composite television before the wake-up time is off, the wake-up time check step (S200) The timer 150 searches the wakeup time recorded in the composite television and the video tape to confirm the found wakeup time.

In the power-on switching step (S300), a wakeup is searched from the wakeup time checking step (S200), and the power is turned on at the found wakeup time.

In step S400, the video tape inserted into the deck is checked from the video head 200b, the audio head 200d, and the control head 200f of the signal reproducing unit 200.

If there is a video tape from the tape checking step (S400), the video tape is played back in the videotape playback step (S500). In the broadcast step (S800), the broadcast signal for the television channel selected above is displayed through the water pipe 140, and in the power button input step (S600) when the power button is applied from the external input unit, the power is switched off.

As described above, the present invention has the effect that the user can watch the desired video tape during the wake-up time recorded from the composite television, and when there is no tape, the wake-up function can be performed by a television broadcast program. have.

Claims (2)

In the method for performing morning wake-up with television and VCR at wake-up time reserved for composite television, Switching off the power of the composite television (S100), Searching for wake-up time when the composite television is turned off (S200); A power-on switching step (S300) of switching on power when the wake-up time is checked from the wake-up time checking step (S200); When the power is switched on from the power-on switch step (S300), the video tape check step (S400) to check whether there is a video tape on the deck of the VCR, A videotape reproducing step (S500) for reproducing the videotape if there is a videotape from above; If there is no video tape from the video tape check step (S400) step of selecting a TV channel (S700), A television broadcast output step (S800) for broadcasting the selected channel when a channel is selected from the channel selection step (S700); Checking the power button input to turn off the power (S600) characterized in that the output device selection method of the composite television. 2. The video tape reproducing step (S500) is characterized in that the video head 200b reads the video signal recorded on the video track of the video tape, and the video signal read from the video head 200b is the head amplifier IC unit. Amplifying by 200a, The audio head 200b reads the audio signal recorded in the audio track of the videotape, and the audio signal read from the audio head 200b is applied to the audio processing IC unit 200c and processed into a signal suitable for output. Wow, The control head 200f reads the control signal recorded in the control track of the videotape and applies the control signal to the control amplifier 200e. The control signal applied to the amplifier 200e by the control is amplified by the sheath cone 180. Is applied to control the video and audio signals, The output signals of the head amplifier IC unit 200a and the audio processing IC unit 200c are applied to the VCR Y / C IC unit 170, demodulated, and then output to the chroma IC unit 120 to be received by the water pipe 140. Method for selecting an output device of a composite television, characterized in that consisting of a process displayed.