KR940005797B1 - Progrom search method in video cassette recorder - Google Patents

Abstract

implementing recording by altering a control pulse according to a user-designated key input; during playback, searching a corresponding program number by selecting a number designated during the recording, and rewinding the program number by a prescribed time, thereby easily searching a desired program.

Description

Program search method of video cassette recorder

1 is a schematic block diagram of a video cassette recorder for performing recording and playback operations according to the present invention.

2 is a flowchart of operations during normal recording and reserved recording according to the present invention.

3 is a flowchart for searching for a reserved recording program.

* Explanation of symbols for main parts of the drawings

1: vertical synchronous separator 2: CTL recording unit

3: key matrix 4: micom

5: CTL amplifier 6: remote control

7: switch

The present invention relates to a program searching method of a video cassette recorder, and more particularly, by varying the duty ratio of a CTL pulse at an initial position of recording in correspondence with a number input by a user during reservation recording, and matching the numerical value to various derivative effects. A program searching method of a video cassette recorder for obtaining.

In general, in the scheduled recording function of a video cassette recorder, a user can make a scheduled recording, and then search for a reserved program or find a desired program when a plurality of programs are recorded on one tape even during normal recording rather than a scheduled recording. Inserting a tape and then rewinding it to the FF mode has a hassle to operate the operation such as playback.

In addition, when searching for a program using the Video Index Search System (VISS) function, the VISS mark is operated as a playback mode even at FF, so the same operation can be used to select a desired program. There was an uncomfortable problem that must be repeated several times.

Accordingly, the present invention has been made in view of the above-described problems, and when reproducing the video cassette recorder by changing the CTL pulse in response to the key input signal set by the user at the initial recording time in the reservation recording, the recording is performed. The purpose of the user is to enter a designated number to easily find a desired reserved program.

The present invention provides a method for searching a video cassette recorder program using CTL pulses, which records a tape recorder by changing a CTL pulse according to a user-defined number input at the initial recording time. The first means for reproducing and the second means for reproducing the desired reserved program by inputting the designated number when the user easily characterized in that the configuration.

Hereinafter, with reference to the accompanying drawings in detail as follows. 1 is a schematic block diagram for performing a recording and playback operation according to the present invention, in which the microcomputer 4 receives a key signal from the key matrix 3 or the remote controller 6 and the CTL recording unit 2. ) And the switch 7, for example, in the case of recording, outputs a high signal from the microcomputer 4 so that the switch 7 is connected to the A terminal. In this case, the vertical synchronous separator 1 has a video input. The signal is inputted and the vertical synchronization signal is separated and output, and recording is performed on the videotape via the CTL recording section 2, the switch 7, and the CTL head. On the other hand, during playback, a low signal is output from the microcomputer 4 so that the switch 7 is connected to the B terminal, and the signals of the contents recorded on the video tape are transferred to the CTL amplifier 5 through the B terminal of the switch 7. CTL amplifier 5 amplifies a predetermined amount of the applied signal and provides a signal to the microcomputer 4. In addition, the microcomputer 4 is programmed by software to set a normal or scheduled recording time, which will be described in more detail.

FIG. 2 is a flowchart of operations in general recording and reservation recording according to the present invention. First, when the power key is pressed from the key matrix 3, the microcomputer 4 checks the function key of the current video cassette recorder ( Step 100), it is judged whether or not the recording key of the key matrix 3 has been pressed (step 101). When the recording key is pressed, the program proceeds from step 101 to step 102, for example, about 5 seconds. After the elapse of time, the microcomputer 4 provides a signal to perform normal recording (step 103). If the numeric key (step 104) determined by the user is recognized by the microcomputer 4 when a predetermined time has not elapsed, On the basis of this, the CTL recording unit 2 is controlled to change the duty ratio of the CTL pulses at regular intervals to record on the CTL track of the video tape (step 105).

On the other hand, if it is not the recording key, the microcomputer 4 determines whether the reservation recording information input (step 106) is performed, and if it is not the reservation recording information input, the program proceeds from step 106 to step 107 and is included in the corresponding key. Perform the operation of the function. At this time, if there is an input of reservation information, for example, assuming that the information is from 0 to 99, the microcomputer 4 checks the binary number 99 which is the end of the information input (step 108). If a predetermined time elapses after about 5 seconds from the step 108, the program proceeds from step 109 to step 110 to perform general reservation recording. In addition, when a predetermined number of times (step 110) is recognized by the microcomputer 4 when the predetermined time has not elapsed, the duty ratio of the CTL pulse is changed at a predetermined period based on this, and when the scheduled recording time comes (step 112). The scheduled recording start and the CTL recording unit 2 are controlled to the tape CTL track (step 113). When the recording is finished, the program recording is terminated from the above steps 105 and 113.

3 is a flowchart for searching for a reservation recording program according to the present invention. As described above, the microcomputer 4 operates by receiving key signals from the remote controller 6 and the key matrix 3, but the program search key is operated. If the search key is not selected by inputting it (step 200), the program proceeds from step 201 to step 202 to perform an operation of a general function. When the search key is selected, the program number is input (step 203), and the search is performed in the FF mode (step 204). From the step 204, if it is the corresponding number program during the search (step 205), it rewinds by the corresponding number X 2sec (playing reference) (step 206) (for example, if the number is 50, it is changed to binary number). If the rewind operation is completed by the corresponding time (step 207), the tape recorder is stopped and the playback mode is taken to end the program search (step 208). ).

The present invention operating as described above has a feature of easily retrieving by inputting a designated number during reproduction by changing the CTL pulse according to a key input determined by the user in the initial part of the program during general recording reservation recording.

Claims (1)

A program searching method of a video cassette recorder using CTL pulses; When the recording key input selection is during normal recording, if a random number key is input from the remote controller 6 to the microcomputer within a predetermined time, the duty ratio of the CTL pulse is changed at the initial recording time, and the CTL recording section 2 Control to perform normal recording on the tape recorder, and when the recording key input selection is scheduled recording, if any number key is input from the remote controller 6 to the microcomputer 4 within a predetermined time, the CTL pulse is recorded at the initial recording time. By changing the duty ratio, the CTL recording unit 2 is controlled to perform scheduled recording on the tape recorder. During playback, the user inputs the designated number input during recording, searches for the corresponding program number in the FF mode, and executes the corresponding number X 2 sec. Program retrieval room of video cassette recorder, characterized by easy rewinding to find the desired general and scheduled recording program. .