KR20000033633A - Method for displaying time information of video cassette recorder - Google Patents

Abstract

PURPOSE: A method for displaying time information of a VCR is provided for users' convenience. CONSTITUTION: A method for displaying time information of a VCR receives and records a broadcasting signal having auto clock set(ACS) information in a vertical blanking region, and displays the ACS information of the broadcasting signal on an OSD screen in reproduction. The method comprises the steps of: recording a VISS signal at an initial stage of a recording mode(S101), and confirming whether the vertical blanking region of the broadcasting signal has the ACS information(S102); recording ACS information on a control track of a recording tape by changing a duty of a control pulse, when the vertical blanking region has the ACS information(S103); reading the ACS information recorded on the control track, when the VISS signal is detected at an initial stage of reproduction(S108); and displaying recording the date and time of a broadcasting program on an OSD screen, when the ACS information is read(S109).

Description

How to display time information of JCR

The present invention relates to a method of displaying time information of a VCR. In particular, the ACS (Auto Clock Set) information recorded in the vertical blanking section of a broadcast signal in the reservation recording or the normal recording is recorded on the control track of the tape, so that the ACS decoder is not provided. The present invention relates to a method for displaying time information of a VCR in which a time information of a corresponding broadcast program is known when a recorded broadcast program is reproduced even in a non-VCR.

In general, the VCR system is an electronic device having a recording / reproducing function that is commonly used with a TV receiver, and shows a circuit block diagram of the VCR system as shown in FIG. 1.

The circuit block diagram includes a tuner 11 for receiving a regular broadcast signal from the antenna 10 and performing channel tuning, and a phase locked loop (PLL) control of the tuning signal provided from the tuner 11. The lock loop circuit 12, the microcomputer 13 for controlling the VCR system, the OSD processing unit 14 for generating the OSD screen, the system memory 15 for storing and storing predetermined information, and recording / reproducing. A deck unit 16 for performing an operation, a timer unit 17 for performing a clock, a channel reservation function, etc., an RF converter 18 for converting a video signal into an RF signal, and a video signal processing for processing a video signal. The circuit 19 includes an external TV receiver 20 and the like.

If you want to make a scheduled recording in the VCR as above, you can open the OS screen by operating the remote control key, and start the start time, end time, and recording speed of one channel and broadcast program that you want to make reservation recording on the OS screen. By setting it, the microcomputer 13 counts the time while the microcomputer 13 stores the reserved channel and the recording start time and end time, and when the time count result reaches the scheduled recording start time, the reserved channel previously stored in the currently set channel is stored. It is configured to record the broadcasting program for the desired time by switching to and end the recording when the end time is reached.

In order to inform the time information of each broadcast program when the program is scheduled to be recorded as described above, broadcasting stations in the United States and the like encode and transmit the time information in the vertical blanking section, and the TV or VCR decodes this signal and sets it automatically. Auto Clock Set (ACS) is applied.

Therefore, when the automatic time set (ACS) function is completed by the microcomputer 13, the current date and time are automatically set.

In more detail, the microcomputer 13 outputs the function menu screen to the OS screen according to the user's selection. At this time, the user can store the necessary channels in the area in the system memory with the remote controller while using the remote control while watching the corresponding screen. You can perform channel presets, time adjustments for time alignment, and scheduled recording with Video Plus.

The reservation recording function is widely used in VPS (Video Program System) and PDC (Program Delivery Control) in Europe, KBPS in Korea and EDS in USA.

In particular, in the United States, the data format to be added to the 21st H-Line of the broadcast video signal is defined by the EIA standard.

That is, the 21st line is not shown on the screen because it belongs to the vertical retrace period, but data such as caption, broadcaster ID, broadcast content / length, and current time are encoded and transmitted in each predetermined format.

However, in the related art, there is no way of knowing when the recorded broadcast program is recorded when the recorded broadcast program is later watched in the state where reservation recording or general recording is completed using the VCR system.

In addition, students or general public who watch a lot of educational broadcasts often make a reservation recording for several days and then play it again at a leisurely time, but there is no way to check the recording time information of each recorded program. There was a problem.

In addition, even in the case of history management for a broadcast program that has been scheduled recording, there is a problem that history management is not properly performed because the recorded date and time cannot be known.

The present invention has been made to solve the above-mentioned problems, and recorded in the VCR without the ACS decoder by recording the ACS information contained in the vertical blanking section of the broadcast signal in the scheduled recording or the normal recording in the control track of the tape. It is an object of the present invention to provide a method of displaying time information of a VCR in which time information of a corresponding broadcast program is known when playing a program.

In the technical concept for achieving the object of the present invention, in the VCR time display method of receiving and recording a broadcast signal carrying the ACS information in the vertical blanking interval and displaying the ACS information of the broadcast signal on the OSD screen during playback, After recording the VISS signal at the beginning of the recording mode, checking whether ACS information is loaded in the vertical blanking section of the broadcast signal, and if the above result confirms that ACS information is loaded in the vertical blanking section, the control pulse of the recording tape is controlled. Changing the duty to record ACS information; reading the ACS information recorded in the control track when the VISS signal is detected at the beginning of the playback mode; and recording the date and time of recording of the playback broadcast program when the ACS information is read in the above process. An invention for performing a process of displaying on a screen is presented.

1 is a block diagram showing a general VCR system,

2 is a block diagram of a VCR system for implementing the present invention;

3 is a flowchart illustrating a method of displaying time information according to the present invention.

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

10: antenna 11: tuner

12: phase lock loop circuit 13: microcomputer

14: OSD processing unit 15: system memory

16: deck portion 17: timer portion

18: RF converter 19: Video signal processing circuit

20: TV receiver 21: ACS decoder

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

2 is a system block diagram showing the main configuration of a VCR having an ACS function according to the present invention.

That is, the system block diagram illustrates a phase lock loop (PLL) control of a tuner 11 for receiving a regular broadcast signal from the antenna 10 and performing channel tuning, and a tuning signal provided from the tuner 11. A phase lock loop circuit 12, a microcomputer 13 for controlling a VCR system, an OSD processor 14 for generating an OSD screen, a system memory 15 for storing and storing predetermined information, and a recording. Deck unit 16 for performing / playback operation, timer unit 17 for performing clock, channel reservation function, etc., RF converter 18 for converting video signal to RF signal, and video processing video signal. A signal processing circuit 19, an external TV receiver 20, and an ACS decoder 21 that receives and decodes automatic time set (ACS) information provided with a broadcast program from a broadcasting station.

The process of the present invention implemented by the system configured as described above will be described with reference to the flowchart of FIG. 3.

The broadcasting program signal transmitted from the broadcasting station includes EDS (Extended Data Service) information on line 21 of the vertical blanking interval, which includes program information, program rating, and program description. , Local time information, etc. will be displayed.

Therefore, whenever the broadcast program signal is received by the tuner 11 of the VCR through an antenna, Extended Data Service (EDS) information is also provided to the VCR. In this case, the VCR according to the present invention converts time information of the EDS information into an ACS decoder ( 21) to decode and automatically set the time.

When the current time information is decoded by the ACS decoder 21, the microcomputer 13 records and stores the decoded time information in the system memory. However, the above record storage process may or may not be optional.

When the user presses the recording key of the remote control in the above state, the microcomputer 13 checks this and sends a control signal to the deck unit 16. Accordingly, the control head of the deck unit 16 controls the control pulse duty on the control track. The (Duty) ratio is 6: 4 to record the VISS signal.

After recording the VISS signal, the microcomputer 13 receives a predetermined signal from the ASC decoder 21 and determines whether ACS information is loaded in the vertical blanking section of the broadcast signal currently being recorded.

As a result of the determination, if it is determined that ACS information is included in the vertical blanking section of the broadcast signal currently being recorded, the microcomputer 13 sends a control signal to the deck unit 16 again, and accordingly the control head of the deck unit 16 After recording VISS (Video Index Search System) signal at the beginning of recording, change ACS information (recording year / month / day / hour) by changing duty ratio of control pulse to 3: 7 and record it on control track. Done.

When the user presses the recording stop key and then presses the play key again while the ACS information is recorded on the control track of the recording tape as described above, the microcomputer 13 checks this and then returns to the deck unit 16. A control signal is sent to activate the playback mode.

At the beginning of the play mode execution, the microcomputer 13 checks whether the VISS signal is detected from the control track of the recording tape, and if it is confirmed that the VISS signal is detected, it is recorded immediately after the VISS signal recorded on the control track. You will read the ACS information.

When ACS information is read in the above process, the microcomputer 13 sends a control signal to the OSD processor 14 to display the OSD screen indicating the recording date and time of the broadcast program recorded by the CRT unit 20 as follows. .

"Recording date and time 98.10.10. 08:00"

Another embodiment is as follows.

That is, when the ACS information carried in the vertical blanking section of the broadcast program signal transmitted from the broadcasting station using the ACS decoder 21 is stored in the system memory 15 in advance, the microcomputer 13 performs the VISS at the beginning of the play mode. (Video Index Search System) If it is determined that the VISS signal is detected after determining whether the signal has been detected, it is time to start playing the broadcast program, and the ACS information recorded and stored from the system memory 15 is read.

When the ACS information reading process is completed, the microcomputer 13 transmits a control signal to the OSD processing unit 14 to display the recording date and time of the recording date of “recording date and time 98.10.10. 08:00” to the CRT unit 20. Will be displayed.

On the other hand, when a user watches a broadcast program and presses the ACS information confirmation key provided on the remote controller, the microcomputer 13 checks this and reads the ACS information from the system memory 15.

In addition, when the ACS information is read from the system memory 15, the microcomputer 13 again applies a control signal to the OSD processing unit 14 to the CRT unit 20 to display the " recording date & time 98.10.10. 08: 00 &quot; The OSD screen that displays the recording date and time will be displayed.

As can be seen from the above description, the present invention provides a method of displaying time information of a VCR that receives and records a broadcast signal carrying ACS information in a vertical blanking section and displays the ACS information of the broadcast signal on an OSD screen during playback. After recording the VISS signal at the beginning of the recording mode, checking whether the ACS information is loaded in the vertical blanking section of the broadcast signal, and if the above result confirms that the ACS information is loaded in the vertical blanking section, the control is controlled by the control track of the recording tape. Changing the duty of the pulse to record the ACS information; reading the ACS information recorded on the control track when the VISS signal is detected at the beginning of the playback mode; and recording the date and time of the playback broadcast program when the ACS information is read in the process. By performing the process of displaying on the OSD screen, the time schedule for the recorded program can be recorded when scheduled recording is made with the VCR. For anytime when you want an effect that can be easily understood.

Claims (1)

In the VCR time display method of receiving and recording a broadcast signal carrying the ACS information in the vertical blanking period, and displaying the ACS information of the broadcast signal on the OSD screen during playback, (a) recording the VISS signal at the beginning of the recording mode and checking whether ACS information is included in the vertical blanking section of the broadcast signal; (b) in the step (a), if it is confirmed that the ACS information is loaded in the vertical blanking section, changing the duty of the control pulse on the control track of the recording tape and recording the ACS information; (c) reading the ACS information recorded in the control track when the VISS signal is detected at the beginning of the playback mode; and (d) displaying the recording date and time of the playback broadcast program on the OSD screen when ACS information is read in step (c).