KR950014859B1 - Recording date writing and searching apparatus - Google Patents

Abstract

The device for recording and searching a recording date of a recording program comprises: a timer controller for storing information on time; a servo/syscon controller for perceiving the present time set on the timer controller as the data corresponding to a recording date and recording it on a control track of a tape as a BCD code at a recording operation, and detecting the BCD code corresponding to the date of the previously recorded program input as a key value by a user and searching the recorded program at a recorded program searching operation; and a deck unit for recording the BCD code by the control of the servo/syscon controller and detecting the recorded BCD code.

Description

Recording date recording and retrieval device of recording program

1 is a block diagram of a control signal recording apparatus of a video cassette recorder to which the present invention is applied.

2 is a data format recorded on a control track of a video tape according to the present invention.

3 shows an exemplary data format recorded on a control track of a video tape according to the present invention.

* Explanation of symbols for main parts of the drawings

10 deck 11: control head

13: Head Drum 15: Video Tape

17: video tape cassette 20: servo / ciscon control unit

30: timer control unit 40: remote control

The present invention relates to a retrieval apparatus for a recorded program of a video cassette recorder (hereinafter referred to as a VCR), and more particularly, to an apparatus for automatically recording a program recording date and retrieving a recorded program of a specific date.

In VCR, there is a function called Vis (VHs Index Search System) as a method of easily finding the necessary part of a program recorded on a videotape. This function records specific bismarks on the tape's control tracks so that you can easily find the desired program part by searching for it. In addition to this, there is a function called VASS (VHS Address search System), which records the user's desired key value on the tape's control track instead of the Bismarck. This makes it easy to find parts. This VASS function has the advantage of allowing the user to specify a key value randomly, compared to the VISS function.

The present invention was devised so that the above-described VASS function can be used more conveniently. Its purpose is to automatically record the recording date on the control track of the tape during the recording operation, and to record on the date specified by the user as the key value during the searching operation. It is to provide a device for easily finding a programmed program.

According to the present invention for achieving the above object, there is provided an apparatus for easily searching for a program recorded in a video cassette recorder including a timer control unit for indicating information on time and a servo / syscon control unit for controlling the deck unit. The servo / ciscon control unit recognizes the current time set in the timer control unit as data corresponding to a recording date during recording operation, and records it as a BCD code due to a duty change on a tape control track. In the retrieval operation, the recorded program is searched for by detecting a BCD code corresponding to the date of a previously recorded program specified by the user as a key value.

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

Referring to FIG. 1, a block diagram for a control signal recording and retrieval of a VCR to which the present invention is applied is shown as a block diagram. The deck portion, indicated by reference numeral 10, includes a control head 11, a drum 13, and houses a tape cassette 17. At this time, the video tape of the cassette 17 is loaded into the drum 13. The servo / ciscon controller 20 is in charge of controlling the deck unit 10 and the servo device (not shown) in the VCR, and the timer controller 30 is responsible for all functions of time setting related to recording of the VCR.

According to the present invention, in the program recording operation, the servo / syscon controller 20 receives the current date information set in the timer controller 30 and controls the control head 11 to record the tape 15. The date information is recorded as the recording date on the control track.

2 shows the data format recorded on the control track of the tape 15 in the program recording operation. This data format takes a form similar to the data format applied to the VASS system described earlier. Shown at the top of FIG. 2 is a data area on a control track of a tape, where area C is an area in which a retrieval function recognition code is recorded, and area D is an area in which a recording date is recorded. On the other hand, shown at the bottom of FIG. 2 is the data format of the areas C and D. The recognition code recording area C is 11 bits in which specific binary data values are recorded, and the date data area D is recorded. ) Is 16 bits, and the month and day are written in 8 bits each.

Referring to FIG. 3, data recorded in the date data area D is shown by way of example. For example, if a program was recorded on March 14, the data area D would be recorded as data "0000", "0011", "0001", and "0100" represented using the BCD code. As is commonly known, the code and data values may be represented as binary data values in such a way that a change in the control signal, e.g. 60% of duty, is recognized as "0" and 27.5% of duty is recognized as "1". will be. The data format configured as described above is repeatedly recorded at least three times in the same form.

As described above, in the state where the recording date is recorded as data, the program search operation according to the present invention is performed as follows.

First, in order to search for a desired program on the remote control 40 having a number key, the user may select, for example, "0314" representing March 14, and the timer controller 30 may select the date. Information about the servo / ciscon control unit 20 is transmitted. The servo / ciscon control unit 20 searches for the data area recorded as "0314" from the control track while operating the drum 13 in the fast forward (FF) mode or the fast reverse (REW) mode. The servo / ciscon control unit 20 finds the program portion of the tape recorded on March 14 when the input "0314" data and the data as the BCD value "0314" retrieved from the tape control track match. The FF mode or the REW mode in (13) is converted to the PLAY mode so that the program part desired by the user can be watched.

Therefore, according to the present invention as described above, by providing a recording date as a key value based on the recording date automatically recorded at the time of program recording, the convenience of finding the desired program is provided easily.

Claims (1)

Timer control unit 30 for storing information on time, and at the time of recording operation, the current time set in the timer control unit 30 is recognized as data corresponding to the recording date, and a change in duty on the control track of the tape is performed. Servo / syscon control unit for recording the recorded program by controlling to record as a BCD code, and controlling the BCD code corresponding to the date of a previously recorded program to be input as a key value by the user during recording program search operation. And a deck unit (10) for recording the BCD code and detecting the recorded BCD code under the control of the servo / ciscon control unit (20).