KR980011345A - Index information recording and reproducing apparatus of video cassette recorder - Google Patents

Abstract

The present invention relates to an index information recording and reproducing apparatus for a video cassette recorder. To this end, the present invention is configured to record time information at a start time of each recording on an audio track together with an audio signal, and reproduce and separate the audio information during playback to display the audio information.

Therefore, the present invention has an advantage in that it can record time information of a time at which recording starts when recording is performed for a predetermined program, and also displays time information recorded at the time of playback, thereby allowing the user to use the time information.

Selectivity: 3rd degree

Description

Index information recording and reproducing apparatus of video cassette recorder

Fig. 1 is a view for explaining respective tracks of a cassette tape and signals recorded in the tracks; Fig.

FIG. 2 shows control signals recorded on a control track in FIG. 1; FIG.

FIG. 3 is a block diagram of an index information recording apparatus of a video cassette recorder according to a preferred embodiment of the present invention. FIG.

FIG. 4 is a block diagram of an index information reproducing apparatus of a video cassette recorder according to a preferred embodiment of the present invention. FIG.

DESCRIPTION OF THE REFERENCE NUMERALS

310, 440: Audio signal processing unit 320: Recording amp unit

330: Timers 340 and 490: Microcomputer

350: Mixer part 360: Deck part

410: High pass filter 420: Low pass filter

430: reproduction amplifier section 450: preamplifier section

460: buffer 470: serial-parallel decoder

480: memory 500: display unit

The present invention relates to a recording and reproducing apparatus for a video cassette recorder. More particularly, the present invention relates to a recording and reproducing apparatus for a video cassette recorder, which records time information for the recorded program on an audio track during a predetermined program recording, And an index information recording and reproducing apparatus of a video cassette recorder that provides convenience to the user.

In a video cassette recorder that has been developed and used in recent years, a time ratio in which a control signal is recorded on a control track of a cassette tape at the time of recording a predetermined program is varied at the point of time when recording starts and a control signal is recorded. So that the start point of each recorded program can be found using a method of searching for the starting point of the recorded program.

1, the cassette tape is composed of an audio track A, a video track C and a control track B, and a control (CTL) signal is supplied to the control track B of the cassette tape As shown in FIG. 2, at intervals of 6: 4, the intervals at which the CTL signals are recorded are differently recorded at the recording start point in the recording box. Then, at the time of reproduction, the CTL signals are retrieved as described above, When a CTL signal with a different interval ratio is detected, it is recognized that the point is the start point of the recorded program.

However, in this conventional method, only the point at which recording starts is recorded and recognized at the time of reproduction. Therefore, when the user wants to know other information such as when recorded information, the information is weak and inconvenient.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the conventional inconveniences and it is an object of the present invention to provide an information recording method and a recording medium for recording information on a time at which recording starts when a recording of a predetermined program is started, And an index information recording and reproducing apparatus of a video cassette recorder.

According to a preferred embodiment of the present invention, there is provided an apparatus for recording time information of an audio track at the start of recording of a predetermined program in a video cassette recorder, the apparatus comprising: A timer for counting a current time; a timer for counting a current time; and a timer for counting a current time, and a timer for counting a current time, A mixer unit for mixing the amplified audio signal provided from the recording amplifier unit and the digital signal provided from the microcomputer and outputting the amplified audio signal and the digital signal provided from the microcomputer unit, Output signal to the cassette tape And a deck section for recording on the dio track.

According to another aspect of the present invention, there is provided a cassette tape cassette tape cassette tape cassette tape cassette tape cassette tape cassette tape cassette tape cassette tape cassette tape cassette tape cassette tape cassette tape cassette tape cassette tape cassette cassette cassette cassette cassette cassette cassette cassette cassette cassette cassette cassette cassette cassette cassette cassette cassette cassette cassette cassette cassette cassette cassette cassette cassette cassette cassette cassette cassette cassette A deck unit for reproducing and outputting the time information of the digital recorded on the audio track together with the audio signal when playback of a predetermined program is started; A low pass filter for filtering and detecting time information of a digital signal reproduced and output from the deck unit; a high pass filter unit for filtering and outputting only the audio signal reproduced and output from the deck unit; It is possible to reproduce an audio signal An audio signal processing unit for processing and outputting an amplified audio signal provided from the reproduction amplifier unit and outputting the processed audio signal; and an audio signal processing unit for outputting the time information of the filtered digital provided from the low- A buffer for temporarily storing the amplified digital signal provided from the preamplifier and outputting the amplified digital signal; a serial-parallel decoder for decoding the digital signal provided from the buffer into parallel data; A memory for storing parallel data decoded into parallel data in the serial-parallel decoder; a microcomputer for reading and outputting parallel data representing the time information stored in the memory, Time information It includes parts of the display.

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

FIG. 3 is a block diagram of an index information recording apparatus of a video cassette recorder according to a preferred embodiment of the present invention.

3, the apparatus for recording index information of a video cassette recorder according to an exemplary embodiment of the present invention includes an audio signal processor 310, a recording amplifier 320, a timer 330, A mixer unit 350, and a deck unit 360. [0031]

The audio signal processing unit 310 processes and outputs the audio signal input from the external input complex or the audio signal contained in the broadcast signal.

The recording amplifier unit 320 amplifies the output signal of the audio signal processing unit by a predetermined level so as to be recordable, and provides the amplified signal to the mixer unit 350.

Then, the timer 330 counts the current time.

On the other hand, when recording of a predetermined program is started, the microcomputer 340 reads the current time at which recording starts from the timer 330 and provides the digital signal to the mixer unit 350 as a low frequency digital signal of 30 Hz or less.

The mixer unit 350 mixes the amplified audio signal provided from the recording amplifier unit 320 and the digital signal indicating the time information of the start time of the recording provided from the microcomputer 340 and outputs the mixed signal to the deck unit 360, The unit 360 records this on the audio track of the cassette tape.

FIG. 4 is a block diagram of an index information reproducing apparatus of a video cassette recorder according to another embodiment of the present invention.

4, the index information reproducing apparatus of the video cassette recorder according to the present invention includes a deck unit 360, a high pass filter (HPF) 410, a low pass filter 420, a reproduction amplifier unit 430, An audio signal processor 440, a preamplifier 450, a buffer 460, a serial-parallel decoder 470, a memory 480, a microcomputer 490, and a display unit 500.

The time information when the recording of the predetermined program is started on the audio track of the cassette tape by the index information recording apparatus of the video cassette recorder shown in FIG. 3 is recorded together with the audio signal as a low frequency digital signal of 30 Hz or less The cassette tape is reproduced by the index information reproducing apparatus of the video cassette recorder according to the present invention as follows.

When the reproduction of a predetermined program is started, the deck unit 360 reproduces the digital time information recorded on the audio track along with the audio signal and outputs the reproduced audio signal to the high pass filter 410 and the low pass filter 420.

The low pass filter 420 filters and outputs a digital signal representing time information among the signals reproduced and output from the deck unit 360 to the preamplifier 450. The digital signal representing the time information at the time of recording is 30 Hz or less It is designed to pass only low frequency signals up to 30 Hz.

The high pass filter 410 filters only the raw audio signal reproduced and output from the deck unit 360 and outputs the raw audio signal to the reproduction amplifier unit 430. The reproduction amplifier unit 430 receives the high frequency audio signal from the high pass filter unit 410 Amplifies the provided audio signal to a predetermined level so as to be reproducible, and provides the amplified audio signal to the audio signal processing unit 440. The audio signal processor 440 processes the amplified audio signal provided from the reproduction amplifier 430 to provide a speaker (not shown) and transmits the audio signal through a speaker.

The preamplifier 450 amplifies the digital signal representing the filtered time information provided from the low pass filter 420 to a predetermined level and provides the amplified digital signal to the buffer 460. The buffer 460 amplifies the preamplifier 450 . When the last bit is input, the stored data is output to the serial-parallel decoder 470. The serial-parallel decoder 470 outputs the stored data to the serial-parallel decoder 470 .

The serial-parallel decoder 470 decodes the serial digital signals provided from the buffer into parallel data and provides the parallel data to the memory 480. The memory 480 decodes the serial data into parallel data, And stores the parallel data.

The microcomputer 490 processes parallel data representing time information of the memory 480 so as to be readable and displayable and outputs the data to the display unit 500. The display unit 500 displays the time information provided from the microcomputer 490 So that the user can use the time information.

Meanwhile, the display unit 500 may be a screen having a digitron or an OSD (on screen display) IC.

Therefore, the present invention has an advantage in that it can record time information of a time at which recording starts when recording is performed for a predetermined program, and also displays time information recorded at the time of playback, thereby allowing the user to use the time information.

While the present invention has been particularly shown and described with reference to certain preferred embodiments thereof, those skilled in the art will appreciate that various modifications and changes can be made without departing from the spirit and scope of the invention as set forth in the following claims.

Claims (5)

An apparatus for recording time information of a start time of a predetermined program in an audio track of a video cassette recorder, the apparatus comprising: an audio signal processing unit for processing and outputting an audio signal input from an external input terminal or an audio signal in a broadcast signal 310; A recording amplifier 320 for amplifying the output signal of the audio signal processor 310 so as to be recordable; A timer 330 for counting the current time; A microcomputer 340 for reading the current time from the timer 330 when the recording of the predetermined program is started and outputting it as a digital signal; A mixer unit 350 for mixing and outputting the amplified audio signal provided from the recording amplifier unit 320 and the digital signal provided from the microcomputer 340; And a deck unit (360) for recording the output signal of the mixer unit (350) on the audio track of the cassette tape. The index information recording apparatus of claim 1, wherein the frequency of the digital signal output from the microcomputer (340) is 30 Hz or less. There is provided an apparatus for reproducing and displaying the time information when the time information when the recording of a predetermined program is started on the audio track of the cassette tape is reproduced on the cassette tape recorded with the audio signal as a digital signal of a predetermined low frequency A deck unit 360 for reproducing the time information of the digital recorded on the audio track together with the audio signal when the reproduction of the predetermined program is started, and outputting the reproduced audio signal; A low pass filter (420) for filtering and detecting time information of digital among the signals reproduced and output from the deck unit (360); A high pass filter (410) for filtering and outputting only an audio signal among signals reproduced and output from the deck unit (360); A reproducing amplifier 430 for amplifying the audio signal provided from the high pass filter 410 to a predetermined level so as to be reproducible; An audio signal processor 440 for processing and outputting the amplified audio signal provided from the reproduction amplifier 430; A preamplifier 450 for amplifying time information of the filtered digital provided from the low-pass filter 420 to a predetermined level; A buffer 460 for temporarily storing the amplified digital signal provided from the preamplifier 450 and outputting the amplified digital signal; A serial-parallel decoder 470 for decoding the digital signal provided from the buffer 460 into parallel data; A memory 480 for storing parallel data decoded by the serial-parallel decoder 470 into parallel data; A microcomputer 490 for reading and outputting the parallel data representing the time information stored in the memory 480 so as to be displayable; And a display unit (500) for displaying time information provided from the microcomputer (490). The apparatus of claim 3, wherein the display unit (500) is a digitron. The apparatus of claim 3, wherein the display unit (500) is a screen having an on-screen display (OSD) IC. ※ Note: It is disclosed by the contents of the first application.