JP2645650B2 - Information signal recording device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for recording information signals on a tape-shaped recording medium.

2. Description of the Related Art Conventionally, a cassette tape used for a video tape recorder (VTR) as an information signal recording / reproducing device of this kind has been used according to various uses such as camera shooting by a user, TV program recording or dubbing. I have. By the way, in order to know the contents of the cassette tape later, such as recorded contents, time, a counter, etc., necessary information is handwritten by a user on an index label or the like and pasted on a cassette or a cassette case.

If such a handwriting is troublesome, if you forget to put an index label or forget to write a counter number etc., the memory of the user will fade after time and it will be difficult to search the contents of the tape, especially recording programs It took a considerable amount of time to access the beginning or end of the game.

On the other hand, the concept of a directory has long been used in computer-related storage devices such as floppy disks, and when a user records one file (a video tape corresponds to a program or the like), the name, number, capacity, etc. Information necessary for searching later is recorded in a special area called a directory area.

[Problems to be Solved by the Invention] Therefore, if an attempt is made to apply a fixed area such as the aforementioned directory to a recording medium of a video signal recording or reproducing apparatus, the video tape is rewound to the fixed directory area, Or, there is a problem that it takes several minutes to perform fast forward, and such a concept of a directory has heretofore been considered to be inapplicable to an apparatus using a tape-shaped recording medium such as a video tape recorder.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem. An information signal recording method that incorporates directory information even in a tape-shaped recording medium and allows a user to easily retrieve information recorded on the tape-shaped recording medium later. It is intended to provide a device.

[Means for Solving the Problems] To achieve the above object, an information signal recording apparatus of the present invention is an apparatus for recording an information signal on a tape-shaped recording medium, A memory for storing directory information related to the information signal reproduced from a medium, a unit for updating the directory information in the memory, and a recording unit for recording the updated directory information on the tape-shaped recording medium; And a control means for controlling the recording means so as to cut off the power supply of the apparatus after recording the updated directory information on the tape-shaped recording medium in response to a power-off command.

[Operation] With this configuration, it is possible to reliably record the directory information on the tape-shaped recording medium even when the power is turned off.

Next, an embodiment of the present invention will be described with reference to the drawings. First
FIG. 1 is a diagram for explaining a tape format in a VTR according to an embodiment of the present invention. The recording track 2 is composed of a video track v, a subcode area s, and a space area sp separating them, and the audio signal is multiplexed with the video signal and recorded on the video track v. The arrow in the figure indicates the traveling direction of the rotary head.

FIG. 2 is a diagram illustrating the sub-code area s in FIG. 1 in more detail, and the arrows in the figure also indicate the traveling direction of the rotary head. Since the subcode area s is separated and independent from the video track v, a header portion including a preamble for synchronizing bits and a synchronizing signal for synchronizing frames, a tape address portion indicating a tape address, a directory portion, Other information (hereinafter, such information is referred to as subcode information). As for the directory section, as shown in the lower part of FIG. 2, the program number, program name, start address, other end address, input source (camera, TV channel, dubbing), date, time, required time, recording mode (standard) , Long time), comments, and other information necessary for retrieval (hereinafter referred to as directory information).

FIG. 3 is a block diagram showing a schematic configuration of a main part of a VTR as one embodiment of the information signal recording apparatus of the present invention.
Is a cassette loading detection switch, which sends a signal to the system controller 302 when a cassette is loaded in this apparatus. The video tape cassette is mechanically locked outside the apparatus so that a human cannot rotate the tape by mistake or intentionally. Therefore, when the cassette is loaded, the cassette rotation lock release mechanism 30
3 works. 304 is a capstan drive circuit for running the tape, and 305 is a rotary head drive circuit. Reference numeral 306 denotes a tape address detection circuit which detects an address from the beginning to the end of the cassette tape. This address information may be obtained by counting the number of rotations of the take-up hub in the cassette recording direction by setting the rewind state to 0, or a control (CTI) recorded by a fixed head on a control track (not shown).
A signal obtained by counting rising pulses of a signal may be used.

307 is an operation switch for power on / off (P-ON / P
-OFF key, record key, play key, fast forward key, rewind key, stop key, cassette eject key (hereafter REC key, PLY key, FF key, REW key, STOP key, EJ key
(Called the (EJECT) key). A display device 308 displays part or all of the directory information.

309 temporarily stores subcode information to be written into the subcode area s in FIG.
Is a subcode buffer for temporarily storing the subcode information written in the subcode buffer. 310 is a subcode buffer 3
09 is a directory RAM that stores only directory information among subcode information.

For recording, SW1 is connected to terminal RC, and SW2 is connected to terminal
Connected to the VI side, the image signal passes through the recording amplifier 311 and is recorded on the video track v on the tape by the rotating head 313. Subsequently, while the rotary head 313 passes through the space area sp, SW2 is connected to the terminal SI side, the subcode information is continuously output from the subcode buffer 309, and the recording amplifier 311
, And is recorded in the subcode area s on the tape by the rotary head 313. This operation is performed for each recording track according to the tape running. In the case of reproduction, SW1 is connected to the terminal PB side and passes through the reproduction amplifier 312, and SW3 is connected to the terminal VO side and outputs an image signal. As in the case of recording, while the rotary head passes through the space area sp, SW3 is connected to the terminal SO, and the subcode information written in the subcode area s on the tape is loaded into the subcode buffer 309.
However, in the case of normal reproduction, the directory RAM 310 is not accessed and the contents of the directory RAM 310 are stored.

FIG. 4 is a flow chart showing the operation of this embodiment, and the diamond-shaped portions relate to the operation switch 307 of FIG. In the following, referring to FIG. 4, first,
When the cassette is loaded in the P-ON state or the P-ON key is operated with the cassette loaded (ST401),
The system controller 302 slightly rewinds the tape in the cassette (10 mm
Degree), and operates the rotating head drive circuit 305,
The sub-code information on the tape is loaded from the sub-code area s into the sub-code buffer 309 in FIG. 1 (ST402), and the system controller 302 reads the directory information from the directory RAM 310 in the sub-code buffer 309, and displays it on the display device 308. The directory information is displayed (ST403). Next, use the operation switch 307 to set the FF key or REW.
When a key is input (ST404), fast-forward or rewind is performed (ST405), and the process proceeds to a desired tape address.

At this time, considering that the EJ key or the P-OFF key is not operated (ST406) and the REC key or the PLY key is input (ST407). When the key is input (ST409), the operation stops, the directory information in directory RAM 310 is updated with the information already recorded (ST410), and the process returns to ST404.
Also, without operating the EJ key or P-OFF key (ST4
06) If the PLY key is operated (ST407), the playback operation starts (ST411), and if the STOP key is pressed (ST412), the operation stops. In this case, the process returns to ST404 without changing the directory information. If neither REC key nor PLY key is operated, ST40
The process returns to step 4 and waits for any key operation.

Here, when the EJ key or the P-OFF key is input (ST406), the system controller 302 operates the capstan drive circuit 304 and the rotary head drive circuit 305 again,
The subcode information including the directory information is read from the subcode buffer 309, and is recorded (hereinafter, referred to as "save") over a predetermined tape length (for example, about 15 mm) in the subcode area s of the tape (ST414). In this case, only the subcode area s is recorded, and is not recorded on the video track v in any case. After completing the subcode information save (ST413) procedure on this tape,
The cassette is removed or P-OFF is performed (ST414).
Needless to say, in the case of the P-OFF, not only the input from the operation switch 307, but also a backup power supply such as a battery built in the device against the P-OFF due to an accident such as a power failure or disconnection of an AC outlet. Thus, the process of saving the subcode information in the subcode area s (ST414) can be performed.

Next, where the directory information is actually recorded on the tape will be described with reference to FIG.

FIG. 5 is a diagram showing a directory recording position on the tape in this embodiment, and FIG. 5 (I) is a diagram schematically showing from the beginning to the end of the tape. In the returned state, that is, the position of the tape start end, the position z indicates the state in which the tape has been fast-forwarded, that is, the position of the tape end. In the figure, v indicates a video track, s indicates a subcode area, a triangle indicates that a subcode information loading operation has been performed at that position, and a triangle indicates that a subcode information saving operation has been performed at that position. In FIG. 5, S1 to S4 indicate the positions on the tape where the subcode information was saved, and the positions painted black in particular indicate the positions containing the latest directory information. FIG. 5 (II) shows the contents of the directory RAM, and shows that a program name, a start address, and an end address, which are representative information of the directory information, are stored.

Hereinafter, an example of a general use of the VTR will be described with reference to FIG.

When the program A is recorded in the section between the positions a and b on the tape, and the EJ key or the P-OFF key is operated at the position d, the directory information (D-1) is displayed as shown in FIG.
The contents of -1) are saved in S1.

Next, when the P-ON key is operated while the cassette is loaded or the cassette is loaded, the directory information (D-1) is loaded into the directory RAM 310 of FIG. 3 at the position b on the tape as shown in FIG. 5 (R-2). I do. When the program B is recorded in the section of the position b to c on the tape and the STOP key is operated, the directory information is changed from the contents of (D-1) to (D-
It is updated to the contents of 2), and the EJ key or P-OF
When the F key is operated, the contents of the directory information (D-2) are saved in S2.

Next, when the P-ON key is operated while the cassette is loaded or the cassette is loaded, the directory information (D-2) is stored at the position c on the tape as shown in FIG. To load. When the program C is recorded in the section between the positions c and d on the tape and the STOP key is operated, the directory information is changed from the content of (D-2) to (D
-3) is updated. Then, by operating the REW key, the tape is rewound to the position of the tape start end a, and the EJ key or the P key is pressed.
By operating the -OFF key, the contents of the directory information (D-3) are saved in S3.

Then, when the cassette is loaded or the cassette is loaded,
When operated with the ON key, the directory information (D-3) is loaded into the directory RAM 310 of FIG. 3 at the position a on the tape as shown in FIG. 5 (R-4). And program A
And program B are played halfway, and the STOP key is operated.
When the EJ key or the P-OFF key is operated, the directory information (D-3) is saved in S4 at the position e on the tape without being updated.

According to the VTR as described above, the directory information can be read out at any time after the cassette is loaded, and the user can easily access each program.

[Effects of the Invention] As described above, according to the present invention, it is possible to provide an information signal recording device that allows a user to retrieve information required for retrieval at any time and to easily retrieve the contents of the tape. Was.

[Brief description of the drawings]

FIG. 1 is a view for explaining a tape format in one embodiment of the present invention, FIG. 2 is a view for explaining a subcode area s in FIG. 1 in more detail, and FIG. 3 is a video signal recording / reproduction of the present invention. FIG. 4 is a block diagram showing a schematic configuration of a main part of one embodiment of the apparatus, FIG. 4 is a flowchart showing an operation of this embodiment, and FIG. 5 is a diagram showing a directory recording position on a tape in this embodiment. . In the figure. 301: Cassette loading detection switch 302: System controller 304: Capstan drive circuit 305: Rotating head drive circuit 306: Tape address detection circuit 307: Operation switch 308: Display device 309: Subcode buffer 310: Directory RAM

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shin Shimokoriyama 3-30-2 Shimomaruko, Ota-ku, Tokyo Inside Canon Inc. (72) Inventor Soichi Kashida 770 Shimonoge, Takatsu-ku, Kawasaki-shi, Kanagawa Canon Tamagawa Works Co., Ltd. (56) References JP-A-60-258786 (JP, A)

Claims (1)

(57) [Claims] 1. An apparatus for recording an information signal on a tape-shaped recording medium, comprising: a memory for storing directory information relating to the information signal reproduced from the tape-shaped recording medium; Means for updating, the recording means for recording the updated directory information on the tape-shaped recording medium, and after recording the updated directory information on the tape-shaped recording medium in response to a power-off command A control unit for controlling the recording unit so as to shut off a power supply of the device.