KR19980016440A - Scheduled Recording Method in Video Cassette Recorder - Google Patents

Abstract

The present invention relates to a scheduled recording and playback method in a video cassette recorder for recording and playing back programs for which daily or weekly scheduled recording is set, and assigns a unique index code to each program set for daily or weekly scheduled recording, respectively. Storing by; Recording each program and recording each program at the time of recording each program set to the daily or weekly scheduled recording; Displaying a list of programs for which daily or weekly scheduled recording is set in response to a predetermined reserved recording playback key input and waiting for a user to select a program to be played; And reproducing the program corresponding to the read index code by sequentially reading the index code assigned to correspond to the program selected by the user and sequentially searching the read index code. The code is characterized by recording and reading with a VASS (VHS Address Search System) signal, so that the user can conveniently and conveniently play only the broadcast program that is relevant at the time of playing the daily or weekly scheduled broadcast program. .

Description

Scheduled Recording Method in Video Cassette Recorder

1 is a schematic block diagram of a typical video cassette recorder

2 is a schematic flowchart illustrating a reservation recording process according to the present invention.

＊ Explanation of symbols for main parts of drawing *

10: key input unit 20: microcomputer

30 tuner and modulator 40 signal processor

41: OSD unit 50: deck unit

The present invention relates to a scheduled recording and playback method in a video cassette recorder, and in particular, automatically assigns a unique index number to a program that is scheduled daily and weekly when a scheduled recording is set every day, and is assigned to each program during scheduled recording. The present invention relates to a method of scheduled recording and reproducing in a video cassette recorder in which recording is performed after recording an index number, and the program is continuously searched for only a program having the same index number during reproduction.

In general, the scheduled recording function in the video cassette recorder is a function that can reserve and record a broadcast program in advance according to a user's reservation information (eg, date, start time, end time, channel, and recording speed). It is a very useful function to automatically record a broadcast program desired by the user in the absence of the user, so that the user can play it and watch it next time.

In addition, broadcast programs are typically broadcasted at the same time and on the same channel at regular intervals every day or every week, thus eliminating the inconvenience of the user setting up scheduled recordings on a daily or weekly basis. In addition, weekly scheduled recording was possible.

On the other hand, if you set these daily and weekly scheduled recordings, each scheduled recording program is sequentially recorded on the videotape in order of the date and time of the daily and weekly scheduled recording program, and the recorded scheduled recording programs are one group. Recording continues periodically.

Therefore, in order to continuously play a program having the same program name among the reserved recorded programs, there is an inconvenient problem that a user must search and play by watching a key operation while watching a screen that is played daily.

Accordingly, an object of the present invention is to assign a unique index code to each program in the case of scheduled recording every day and weekly when setting the scheduled recording, and to record each program after first recording the index code given at the time of recording. The present invention provides a method of reserved recording and playback in a video cassette recorder capable of continuously playing back only programs having the same index code during playback.

Meanwhile, the present invention uses a VHS (VHS Address Search System), which is a combination of control signals, as a method of recording and reading an index code.

In other words, the control signal (Control Pulse) in the conventional video cassette recorder is recorded at the lower end of the video tape, that is, the control track (0.75 mm), and is recorded and detected by the control head as a bipolar pulse of frequency 30 Hz.

When recording, the control signal divides the vertical sync signal of the video signal into 1/2 and then records it on the control track. During playback, the control signal is detected and compared with a reference signal of 30 Hz. Phase control.

That is, during recording, the control signal in the form of a square wave extracted from the vertical synchronizing signal is accurately recorded on the video tape once per cylinder rotation, that is, once every 1/30 second, and the control recorded by the control head during playback. The signal is read to control the timing of the capstan motor and rotating head cylinder that drives the videotape.

On the other hand, the bus used for recording (VISS: VHS Index Search System) is a VHS Uniform Index (INDEX) signal, which is recorded on tape as an index signal based on converting a waveform of a normal control pulse at the beginning of recording. When recording, as a vis signal, 62 control pulses with a high level and a low level of about 3 to 7 are recorded, and the normal control pulses with a high level and a low level of about 7 to 3 are described behind the vis signal. Is recorded.

Such a vis is a simple index signal, but the bath can record a predetermined number of digits (for example, four digits) as a combination of the above-described waveform changes of the control signal, so that the desired index code can be recorded and read using the bath. This is possible.

The scheduled recording and playback method in the video cassette recorder according to the present invention is a method for recording and playing back programs for which daily or weekly scheduled recording is set, and assigns a unique index code to each program set for daily or weekly scheduled recording. Granting and storing each; Recording each program and recording each program at the time of recording each program set to the daily or weekly scheduled recording; Displaying a list of programs for which daily or weekly scheduled recording is set in response to a predetermined reserved knockdown playback key input and waiting for a user to select a program to be played; And reading out the index code assigned corresponding to the program selected by the user, sequentially searching for the read index code, and playing only a program corresponding to the read index code.

The index code may be recorded and read by a VASS signal.

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

FIG. 1 is a schematic block diagram of a video cassette recorder, as shown, a key input unit 10, a microcomputer 20, a tuner and a modulator 30, a signal processor 40, an OSD unit 41, and a deck. A portion 50 is included.

In such a configuration, the key input unit 10 is provided as an input means for operating the video cassette recorder, and has a plurality of keys including a reserved recording setting key, a reserved recording reproduction key, and the like to provide a key signal corresponding to a user's key operation. It uses a remote control that can be input at a remote location at low cost, and detects and outputs a key signal carried on an infrared carrier wave from the remote control.

The microcomputer 20 is a means for controlling the overall operation of the video cassette recorder. The OSD for setting the reserved recording is set based on the reserved recording setting key signal from the key input unit 10 as can be seen from the description below. (On Screen Display) Controls the screen and assigns a unique index code to the set weekly and daily scheduled recording program so that reservation information (e.g., date, channel, start time, end time, recording speed, Save the index code along with the recording method (daily scheduled recording, weekly scheduled recording).

In addition, the microcomputer 20 controls the OSD screen for selecting a program to be played based on the reserved recording playback key signal from the key input unit 10, and reads an index code corresponding to the selected program from the memory and applies the VASS signal. Control to reproduce only the same program as the index code read out.

In addition, the microcomputer 20 outputs a tuning signal (PLL data) based on the reservation information when performing the reserved recording, and controls the recording by controlling the signal processing unit 40 and the deck unit 50 described later.

In addition, the tuner and the modulator 30 output a broadcast signal of a channel corresponding to PLL data for channel tuning from the microcomputer 20 among a plurality of broadcast frequency signals transmitted from the broadcast system. And outputs the received video and audio signals to the predetermined output channels (for example, channels 3 and 4) and outputs them to the RF output terminal RF OUT.

On the other hand, the signal processing unit 40 converts the broadcast signal applied from the tuner and the modulation unit 30 or the video and audio signals from the line input terminal LINE IN under the control of the microcomputer 20 as a signal for easy recording. Each line is processed and applied to the deck unit 50, or the video and audio signals reproduced from the deck unit 50 are processed into easy-to-display video and audio signals, so that the line output terminal (LINE OUT), tuner and modulator 30 are processed. Is applied.

In addition, the OSD (On Screen Display) unit 41 in the signal processing unit 40 is a character (font) signal corresponding to the character control signal from the microcomputer 20 to an output image signal or a blue-back signal. Read and synthesize the output.

The deck unit 50 is configured to include a deck mechanism, a loading motor, a video and audio head, a head drum, a control head, a drum coater, a capster motor, and the like, to which the video tape is loaded, and to control the microcomputer 20. Based on this, the video and audio signals from the signal processor 40 are recorded on the video tape, or the video and audio signals recorded on the video tape are read and output.

In particular, the deck unit 50 records or reads the control signal or the modified control signal VASS applied to the control head on the control track of the video tape.

Next, the above-described configuration unit will be described in detail with respect to the reservation recording and reproducing method in the video cassette recorder.

First, the microcomputer 20 displays an OSD screen for setting a program for reserved recording based on the reserved recording setting key signal of the key input unit 10 and stores the reserved recording information set by the user.

At this time, every day, the weekly scheduled recording program is assigned a unique index code and stored together with the above-mentioned reservation information in a memory not shown.

Next, the index code assigned to each program when performing the reserved recording is processed as a VASS signal, first recorded on a video tape, and then the tuner and modulator 30, the signal processor 40, and the deck unit 50 are recorded. Record by controlling.

Then, as shown in the example shown in FIG. 2, the daily or weekly scheduled recording program is sequentially recorded on the video tape in the order of PGM 1-1, PGM 2-1, PGM 3-1, and the index codes are '01', ' 02 'and' 03 'are recorded on the control track, and the next day or next week will be recorded in the order of PGM 1-2, PGM 2-2, PGM 3-2.

Therefore, it is useful for the user to continuously watch related programs, that is, programs of the same name, for example, PGM 1-1, PGM 1-2...

Therefore, in the present invention, in order to play a daily or weekly scheduled recording program, first, the microcomputer 20 determines whether a signal is applied at the time of the reserved recording playback from the key input unit 10, and if the reserved recording playback key signal is applied every day, Or, the OSD screen for displaying a list of a plurality of programs each weekly scheduled recording is read out and controlled.

Next, the user views this OSD screen and selects a broadcast program that the user wants to continuously play with a predetermined key of the key input unit 10.

Therefore, the microcomputer 20 reads the index code corresponding to the selected program, controls the signal processing unit 40 and the deck unit 50 to rewind the video tape, and reads it from the control head in the deck unit 50 through fast forwarding. Then, the combination (bath signal) of the waveform-controlled control signal to be applied is compared with the read index code.

At this time, if the bath signal applied from the control head in the deck unit 50 and the corresponding index code read out are the same, the mode is switched to the playback mode to play the program.

When the bath signal read and applied from the control head in the deck unit 50 is different from the index code read out, the fast forwarding and index code comparison are sequentially performed to perform a bath signal from the control head in the deck unit 50. Only programs with the same and index codes will be played continuously.

As described above, according to the present invention, in the case of the scheduled recording, the program assigns a unique index code to each program every day and weekly, and records each program after recording the index code assigned to the recording first on a videotape. By continuously playing only programs having the same index code during playback, there is an effect that the user can conveniently and conveniently play only relevant broadcast programs at the time of playing a daily or weekly scheduled broadcast program.

Claims (2)

As a method for recording and playing back the programs for which daily or weekly scheduled recording is set, Assigning and storing a unique index code to each program that is set for daily or weekly scheduled recording; Recording each program and recording each program at the time of recording each program set to the daily or weekly scheduled recording; Displaying a list of programs for which daily or weekly scheduled recording is set in response to a predetermined reserved recording playback key input and waiting for a user to select a program to be played; A video cassette comprising a reservation recording and reproducing process comprising reading the index code assigned corresponding to a program selected by a user and sequentially searching the read index code to play only a program corresponding to the read index code. Scheduled recording and playback on the recorder. The method of claim 1, And the index code is recorded and read out using a VHS (VHS Address Search System) signal.