KR100229541B1 - Method and apparatus for timer recording of vcr - Google Patents

Abstract

The present invention relates to a reserved recording method and apparatus for a video cassette recorder for performing a reserved recording by determining a non-signaled section of a broadcast signal. The present invention provides a non-signed section of a start and end of a program to be reserved. A reservation recording method of a video cassette recorder which detects a signal and performs reservation recording, comprising: a reservation recording start process of starting recording of a program to be scheduled recording when the number of no signal sections is detected twice; And a scheduled recording end process of terminating recording of a program to be scheduled-recorded when the number of intervals of no signal is detected once, and the present invention further includes: a tuner for receiving and providing a broadcast signal corresponding to a reserved recording channel; An IF signal processor for separating and providing a broadcast signal provided from a tuner into an image signal and an audio signal; An image signal processor configured to process and provide an image signal provided by an IF signal processor; An image signal discrimination unit comparing a DC voltage of a predetermined level of the image signal provided by the image signal processing unit with a reference voltage and providing a logic signal for the presence or absence of an image signal; An audio signal determination unit for comparing a voltage corresponding to the audio signal level amplified by the audio signal provided by the audio signal processor with a reference voltage and providing a logic signal for the presence or absence of an audio signal; If the logic signal provided from the video signal discrimination unit and the audio signal discrimination unit is a signal for the absence of the video signal and the audio signal and is provided twice, it provides a deck control signal for starting the reservation recording, and discriminates the video signal discrimination unit and the audio signal. A microcomputer providing a deck control signal for terminating the scheduled recording when the logic signal provided by the unit is a signal for no video signal and an audio signal and is provided once; By including the deck unit driven according to the deck control signal provided by the microcomputer, it is possible to accurately perform scheduled recording.

Description

Scheduled recording method and apparatus of video cassette recorder

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reserved recording system of a video cassette recorder, and more particularly, to a reserved recording method and apparatus of a video cassette recorder for performing reserved recording by discriminating no signal sections of a broadcast signal.

As is well known, a video cassette recorder has a recording function for recording a composite video signal applied from a tuner tuned into a desired channel to a broadcast signal received through an antenna, and a composite video signal recorded on a magnetic tape. Has a playback function to display on a television monitor.

In addition, since the video cassette recorder has a reserved recording function, the reserved recording function includes reserved information inputted by a user (for example, a broadcast date, start time, end time, broadcast channel of a desired program, and recording speed of a desired program). Etc.) It is a function that can reserve and record a broadcast program in advance by setting, and it is a very advantageous function to automatically record a broadcast program desired by the user in the absence of the user, so that the user can play and watch it next time.

That is, when performing the reserved recording, as described above, when the reserved recording start time set by the reservation information is reached, the scheduled recording is performed by using the reserved recording speed of the broadcast signal of the set reserved channel.

However, if the scheduled recording time set by the user is set only for the time corresponding to the broadcast time of the scheduled recording program, the program to be scheduled recording is exactly recorded, that is, less recording or the scheduled recording time is scheduled recording program. In case of setting more than the airing time, there was a problem of recording unnecessary broadcast programs in addition to the reserved recording program.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and an object of the present invention is to start reservation recording when a start portion and an end portion of a program to be reserved recording are detected during a reservation recording, and an end portion of a program to be reserved recording. Provided is a reservation recording method and apparatus for a video cassette recorder for accurately performing reservation recording by terminating scheduled recording when the detection is detected.

A feature of the present invention for achieving the above object is a reservation recording method of a video cassette recorder for performing reservation recording by detecting a no-signal section at the beginning and end of a program to be reserved and recording, the number of the no-signal sections A scheduled recording start process of starting recording of the scheduled recording program when is detected twice; And a reservation recording end process of terminating recording of the program to be reserved and recorded when the number of sections of the non-signal is detected once.

According to another aspect of the present invention, there is provided a reserved recording apparatus of a video cassette recorder for performing reserved recording of a program to be reserved, comprising: a tuner for receiving and providing a broadcast signal corresponding to a reserved recording channel; An IF signal processor which separates and provides a broadcast signal provided from the tuner into an image signal and an audio signal; An image signal processor configured to process and provide an image signal provided by the IF signal processor; An audio signal processor configured to process and provide an audio signal provided by the IF signal processor; An image signal discrimination unit comparing a DC voltage of a predetermined level of the image signal provided by the image signal processing unit with a reference voltage and providing a logic signal for the presence or absence of an image signal; An audio signal determination unit comparing a voltage corresponding to an audio signal level amplified by the audio signal provided by the audio signal processor with a reference voltage and providing a logic signal for the presence or absence of an audio signal; If the logic signal provided from the video signal discrimination unit and the audio signal discrimination unit is a signal for the video signal and no audio signal and is provided twice, the deck control signal for starting reservation recording is provided, and the video signal discrimination unit and A microcomputer providing a deck control signal for terminating the scheduled recording when the logic signal provided from the audio signal determination unit is a signal for the video signal and no audio signal and is provided once; And a deck unit for driving in accordance with the deck control signal provided by the microcomputer.

The above objects and various advantages of the present invention will become more apparent from the preferred embodiments of the invention described below with reference to the accompanying drawings by those skilled in the art.

1 is a block diagram showing the configuration of a reserved recording apparatus of a video cassette recorder according to a preferred embodiment of the present invention.

2 is a flowchart for performing a reservation recording method of a video cassette recorder according to the present invention.

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

10: key input unit 20: micom

30 tuner 40 IF signal processor

50: video signal processor 60: video signal discrimination unit

70: audio signal processor 80: audio signal determination unit

90: deck

Hereinafter, with reference to the accompanying drawings will be described in detail the operation of the preferred embodiment according to the present invention.

1 is a block diagram showing the configuration of a reserved recording apparatus of a video cassette recorder according to the present invention, which corresponds to a key input unit 10 for providing a key signal pressed by a user and a key signal provided from the key input unit 10; A microcomputer 20 providing a control signal, a deck control signal corresponding to a logic signal for the presence or absence of a video signal and an audio signal, a tuner 30 for tuning a broadcast signal for a reserved channel, and a tuner ( The video signal provided from the IF (intemediate frequency) signal processor 40 and the IF signal processor 40 to demodulate and broadcast the broadcast signal provided by the control unit 30 are provided. The video signal processor 50 for processing and providing the logic signal for the presence or absence of the video signal provided by the video signal processor 50 to the microcomputer 20, the video signal determination unit 60, The audio signal processor 70, which processes and provides the audio signal provided by the IF signal processor 40, provides a logic signal for the presence or absence of an audio signal provided by the audio signal processor 70 to the microcomputer 20. The audio signal determination unit 80, and the deck unit 90 for driving in accordance with the deck control signal provided from the microcomputer 20.

The detailed description of the operation of the video cassette recorder according to the present invention configured as described above is as follows.

The key input unit 10 is composed of key metrics to provide a predetermined key signal that is pressed by the user, that is, a signal for reserved recording information to the microcomputer 20, and the microcomputer 20 provides a reserved recording provided by the key input unit 10. When the information, that is, the signal for the reserved recording channel information is provided, the channel tuning signal for tuning the reserved recording channel is provided to the tuner 30.

At this time, the tuner 30 tunes a channel corresponding to a channel tuning signal provided by the microcomputer 20, and provides a broadcast signal of the tuned channel to the IF signal processor 40. That is, the IF signal processor 40 demodulates the broadcast signal provided from the tuner 30, separates the broadcast signal from the image signal and the audio signal, and provides the signal to the image signal processor 50 and the audio signal processor 80.

That is, the image signal processor 50 processes the image signal provided from the IF signal processor 40 and provides the image signal to the image signal determiner 60, and the audio signal processor 70 supplies the IF signal. The audio signal provided from the signal processor 40 is processed and provided to the audio signal determiner 70.

At this time, the image signal discrimination unit 60 determines whether the image signal is present in the image signal provided by the image signal processing unit 50 and provides a logic signal corresponding to the determination result to the microcomputer 20 as described above. The clamp 61 fixes the image signal provided from the image signal processing unit 50 to a predetermined level and provides the predetermined leveled image signal to a low pass filter (LPF).

That is, the low pass filter 62 low-pass filters the image signal provided by the clamp 61 to the inverting (-) input terminal of the first comparator 63. At this time, the first comparator 63 compares the DC voltage and the reference voltage V _ref of the non-inverting (+) input terminal with respect to the low-pass filtered image signal of the predetermined level provided to the inverting (-) input terminal. .

As a result of the comparison, when the DC voltage provided to the inverting (-) input terminal is higher than the reference voltage V _ref of the non-inverting (+) input terminal, it is determined that there is an image signal and a low level logic signal is provided to the microcomputer 20. When the DC voltage provided to the inverting (-) input terminal is lower than the reference voltage V _ref of the non-inverting (+) input terminal, it is determined that there is no video signal and provides a high level logic signal to the microcomputer 20.

Meanwhile, as described above, the audio signal determination unit 80 determines whether an audio signal is present in the audio signal provided by the audio signal processing unit 70 and provides a logic signal corresponding to the determination result to the microcomputer 20.

That is, the amplifier 81 of the audio signal determiner 80 amplifies the audio signal provided by the audio signal processor 70 to a predetermined level and provides the low pass filter 82 to the low pass filter 82. The provided audio signal of a predetermined level is low-pass filtered and provided to the inverting (-) input terminal of the second comparator 83. In this case, the second comparator 83 compares the DC voltage and the reference voltage V _ref of the non-inverting (+) input terminal with respect to the low-pass filtered image signal of a predetermined level provided to the inverting (−) input terminal. .

As a result of the comparison, when the DC voltage provided to the inverting (-) input terminal is higher than the reference voltage V _ref of the non-inverting (+) input terminal, it is determined that there is an audio signal, and a low level logic signal is provided to the microcomputer 20. When the DC voltage provided to the inverting (-) input terminal is lower than the reference voltage V _ref of the non-inverting (+) input terminal, it is determined that there is no audio signal and provides a high level logic signal to the microcomputer 20.

At this time, the logic signal provided to the microcomputer 20 from the image signal discrimination unit 60 and the audio signal discrimination unit 80 may be set differently in system design. Will understand.

On the other hand, the microcomputer 20 determines that the video signal determination unit 60 and the audio signal determination unit 80 is a low level logic signal is provided twice, the deck control for starting the scheduled recording by determining that the start of the program to be scheduled recording When the signal is provided to the deck unit 90 and the low level logic signal is provided once by the video signal determining unit 60 and the audio signal determining unit 80, it is determined that the end of the program to be scheduled recording is scheduled. The deck control signal for ending is provided to the deck unit 90.

Therefore, the deck unit 90 operates in the reserved recording start mode and the reserved recording end mode according to the deck control signal provided from the microcomputer 20.

2 is a flowchart for performing a reservation recording method of a video cassette recorder according to the present invention, FIG. 2A is a flowchart illustrating a method of starting reservation recording of a video cassette recorder according to the present invention, and FIG. 2B is a video cassette according to the present invention. As a flowchart of the reserved recording end method of the recorder, it will be described in detail with reference to the block diagram shown in FIG.

First, the reservation recording start process according to the present invention is as follows.

If the number of non-signal sections 1α, i.e., a section where no video signal and audio signal is detected, is zero (step 200a), the microcomputer 20 proceeds to step 201a and uses the internal timer. The time is counted and the process proceeds to step 202a.

The microcomputer 20 proceeds to step 202 and determines whether the current time counted in step 201a corresponds to a time obtained by subtracting the preset recording start time and the preset time. That is, the microcomputer 20 sets a time corresponding to the difference between the scheduled recording start time and the preset time, for example, when the scheduled recording start time is 9:00 pm and the preset time is 30 minutes. Since the time corresponding to the preset time difference is 8:30 pm, if the current time counted is 8:30 pm, the process proceeds to step 203a to determine whether an image signal is detected.

That is, the microcomputer 20 determines whether the logic signal provided from the image signal discrimination unit 60 is a high level logic signal, that is, a logic signal indicating that there is no video signal. When the logic signal is provided, the process proceeds to step 204a to determine whether the logic signal provided from the audio signal determination unit 60 is a logic signal of a high level.

As a result of the determination, if the logic signals provided from the image signal discrimination unit 60 and the audio signal discrimination unit 80 are high level logic signals, the microcomputer 20 increases the number of non-signal sections 1α in step 200a by one. In step 206a, the number of the no signal sections 1α is counted to determine whether the number of the no signals is two.

That is, if the high level logic signal is provided from the image signal discrimination unit 60 and the audio signal discrimination unit 80 twice, the microcomputer 20 proceeds to step 207a to initialize the number of no signal sections 1α. In operation 208a, a deck control signal for driving in the reserved recording start mode is provided to the deck unit 90.

After performing the reservation recording start process of the video cassette recorder according to the present invention according to the flowchart shown in FIG. 1A, the reservation recording end process of the video cassette recorder is as follows.

If the deck unit 90 is in the reserved recording mode in step 200b, the microcomputer 20 proceeds to step 201b to count the current time, and proceeds to step 202b to count the current time of the scheduled recording end time and the preset time. If the current time counted in step 201b is the time corresponding to the difference between the reserved recording end time and the preset time, the process proceeds to step 203b.

At this time, the microcomputer 20 proceeds to step 203b and determines whether a high level logic signal, that is, a logic signal for no video signal, is provided by the image signal discrimination unit 60. In step 204b, the audio signal determination unit 80 determines whether a logic signal of a high level, that is, a logic signal for no audio signal is provided.

As a result of the determination, when a high level logic signal is provided from the audio signal determination unit 80, the process proceeds to step 205b to provide a deck control signal for driving in the reserved recording end mode.

As described above, the reservation recording method of the video cassette recorder according to the present invention detects the number of no-signal sections in which the video signal and the audio signal are not detected from the broadcast signal of the program to be reserved and recorded, and the number of the no-signal sections is two. If detected once, the scheduled recording of the program to be reserved is started, and if the number of no-signal sections is detected once, the scheduled recording of the program to be scheduled-recorded is terminated, thereby making it possible to accurately perform scheduled recording.

While the invention has been shown and described with respect to certain preferred embodiments, it will be apparent to those skilled in the art that various modifications, changes and omissions can be made without departing from the spirit and scope of the invention.

Claims (4)

A method of recording a video cassette recorder in which a video cassette recorder performs reserved recording by detecting an unsigned section at the beginning and end of a program to be reserved. A scheduled recording start process of starting recording of the scheduled recording program when the number of the non-signal sections is detected twice; And And a scheduled recording end process of terminating recording of the program to be scheduled-recorded when the number of sections of the non-signal is detected once. 2. The method of claim 1, wherein the reservation recording start process comprises: a time counting step of counting a current time when the number of the no-signal intervals is zero, and a count time of the time counting step is a difference between a preset recording start time and a preset time; A time comparison step of determining whether the time is equal to the time; and as a result of the time comparison step, if the current time counted is equal to the time difference between the scheduled recording start time and the preset time, the program to be scheduled recorded Determining whether or not the video signal is detected in the video signal detection step, if the video signal is not detected in the video signal detection step of determining whether or not the audio signal detection step for determining whether to detect the audio signal for the program to be scheduled recording In the determining whether the audio signal is detected, the audio signal Detecting no signal number twice if not detected, and starting reservation recording mode for starting the scheduled recording for the program to be reserved when the number of no signals is detected twice; Schedule recording method of a video cassette recorder, characterized in that. The method of claim 1, wherein the scheduled recording end process comprises: a time counting step of counting a current time and determining whether a count time of the time counting step is equal to a time corresponding to a difference between the reserved recording end time and a preset time; Comparing the time, as a result of the time comparison, if the counted current time is equal to the time difference between the scheduled recording end time and the preset time, the image for determining whether to detect the video signal for the program to be scheduled recording An audio signal detection step of detecting an audio signal with respect to a program to be reserved recording if the video signal is not detected in the signal detection step, the video signal detection step, or if the audio signal is not detected in the audio signal detection step Ending Scheduled Recording Mode Exiting Scheduled Recording Mode Scheduled recording method of a video cassette recorder comprising. A reserved recording device of a video cassette recorder for performing reserved recording of a program to be reserved. A tuner for receiving and providing a broadcast signal corresponding to a reserved recording channel; An IF signal processor for separating and providing a broadcast signal provided by the tuner into an image signal and an audio signal; An image signal processor configured to process and provide an image signal provided by the IF signal processor; An audio signal processor configured to process and provide an audio signal provided by the IF signal processor; An image signal discrimination unit comparing a DC voltage of a predetermined level of the image signal provided by the image signal processing unit with a reference voltage and providing a logic signal for the presence or absence of an image signal; An audio signal determination unit comparing a voltage corresponding to an audio signal level amplified by the audio signal provided by the audio signal processor with a reference voltage and providing a logic signal for the presence or absence of an audio signal; If the logic signal provided from the video signal discrimination unit and the audio signal discrimination unit is a signal for the video signal and no audio signal and is provided twice, the deck control signal for starting reservation recording is provided, and the video signal discrimination unit and A microcomputer providing a deck control signal for terminating the scheduled recording when the logic signal provided from the audio signal determination unit is a signal for the video signal and no audio signal and is provided once; And And a deck unit for driving in accordance with a deck control signal provided by the microcomputer.