JPH06119764A - Medium recording and reproducing device - Google Patents

Abstract

PURPOSE:To obtain the information of a whole tape by a small number of times of reproducing operation, to perform rewriting and DRAW operation without any operation and complicating the circuit and in the short time. CONSTITUTION:In a video recording mode, a switch 4 is connected to the REC side and a tape identifying code is generated. The information of a tape counter, etc., is generated and automatically written in the area of a memory 9 corresponding to the identifying code. In a reproducing mode, the switch 4 is connected to the PB side and the tape identifying code from the tape is detected in the order of a magnetic head 1 a video signal processing circuit 2 a data code converting circuit 3 the switch 4 a fixed time later after reproducing operation. The same identifying code of the memory 9 is retrieved by means of a retrieval block 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medium recording / reproducing apparatus,
In particular, the present invention relates to a device for recording / reproducing a signal on / from a medium by a magnetic or optical method.

[0002]

2. Description of the Related Art Conventionally, as a device for displaying information at the time of recording by a recording / reproducing device, for example, in a VTR, tape information such as recording date and time, time code, etc. in a predetermined area of a magnetic tape (hereinafter referred to as tape) There is known an apparatus which is provided with a unit for sequentially writing data and a unit for reading and displaying recorded tape information.

[0003]

However, in the above-mentioned conventional example, since all the recorded information on the tape is a system for writing and reading only predetermined items in a predetermined area of the tape, the information such as the original image is recorded. I was unable to obtain a large amount of information to write because of the balance with the amount.

Further, since the information recorded on the tape can only read the recorded information at that position, the information recorded on the entire tape can be read and displayed by running the tape from the beginning to the end once. Had to memorize.

Further, it is possible to correct the information once recorded,
In order to add it later, the recorded video signal,
There is a problem that a means for erasing and writing only the tape information without damaging an audio signal or the like is required, which makes the circuit complicated and takes time.

The present invention has been made in order to solve the above problems. Recording information of the entire tape can be obtained with a slight reproducing operation, and rewriting and additional recording of recording information is a rewriting operation. It can be done in a short time without complicating the circuit.

Further, the amount of information is not limited to the data code area, a relatively large amount of information can be handled, and the tape identification code is automatically generated, recorded, and searched, and no special operation is required. The purpose is to

[0008]

Therefore, in the present invention, the first means for writing and reading the identification code unique to the medium in the recording medium, and the identification code of the medium and the title in the memory device in the main body. , A second means for writing and reading other recording information, and a display for displaying the recording information written in the memory of the main body by the second means by reading the identification code from the medium by the first means. Means for Solving the Problems The present invention intends to solve the above problems and achieve the above objects by a medium recording / reproducing apparatus comprising:

[0009]

According to the medium recording apparatus of the present invention, an identification code unique to the medium is written in and read from the recording medium by the first means.
The second means writes and reads the identification code, title, and other recording information of the medium in the memory device in the main body, and the first means writes the identification code from the medium, whereby the display means displays the first information. The recording information written in the memory of the main body is displayed by means of No. 2.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of a medium recording / reproducing apparatus according to an embodiment of the present invention.

In FIG. 1, reference numeral 1 is a magnetic head for recording and reproducing a video signal and a tape identification code on a magnetic tape. Since the magnetic head 1 and the magnetic tape driving means are known, their description will be omitted.

Reference numeral 2 denotes a video signal processing circuit for recording and reproduction, which converts the output of the magnetic tape 1 into a video signal at the time of reproduction and outputs the video signal to the mix circuit 13 and the data code conversion circuit 3. . Further, at the time of recording, the signal from the camera 12 and the data code conversion circuit 3
Signal is converted into a recording current of the magnetic head 1.

Reference numeral 3 is a data code conversion circuit between the signal of the video signal processing circuit 2 and the microcomputer.
Reference numeral 4 denotes a switch for switching between reading and writing the tape identification code.

Reference numeral 5 is a timing for controlling switching of the read / write mode of the switch 4 and switching of the read / write mode of the data code conversion circuit 3 and for reading / writing data on the tape at appropriate timings. It is a control circuit. Reference numeral 6 denotes a memory control block (tape identification, code retrieval) for retrieving tape information by retrieving the same code as the retrieved tape identification code from the memory 9 when reading the data code.

Reference numeral 10 is a display control means for displaying various tape information read from the memory 9 on the CRT, and outputs the display information to the mix circuit 13. And
The mix circuit 13 mixes the video signal from the video signal processing circuit 2 and outputs the mixed signal to the CRT 14.

Reference numeral 7 is an identification code (I
D code) is generated and recorded on the tape through the path of the switch 4 → data code conversion circuit 3 → video signal processing circuit 2 → magnetic head 1 and is registered in the memory 9.

Reference numeral 8 is a means for controlling the tape counter, the recording date and time, and other various tape information, and writing them in the area of the memory 9 corresponding to the tape identification code.

11 is the title of the tape, the number of the scene,
This is a means for inputting a title and the like from the outside.

Reference numeral 15 is a main body system control block, which is responsible for key input control, input control, motor control, and other controls, and also interfaces with the block of the present system.

Further, in FIG. 1, a portion surrounded by a broken line is a block diagram showing a concept in the case where this system is realized by software inside one or a plurality of microcomputers, and a part thereof is shown. It is also possible to make it hardware or to make the data code conversion circuit 3 software and make a system incorporated in the microcomputer.

FIG. 2 is a flow chart showing an algorithm for realizing the function of the broken line portion of the configuration of FIG. 1 by software, and FIG. 3 is a flow chart showing a continuation of FIG.

FIG. 4 is a diagram showing a data code for writing the tape identification code in this embodiment,
(A) shows the data code area for writing the tape identification code of the magnetic tape in the first embodiment.

(B) is a diagram showing the structure of the data code in this embodiment, which has a structure of 8 bytes from word φ to 4 and forms one group in three categories, and together with simple tape recording information, tape identification The code is recorded. In this case, only the tape identification code may be used. No matter which part of the tape is played, the data in all categories can be read in a short time within a few seconds.

FIG. 5 is an example of a case where the tape information in this embodiment is displayed on the CRT on screen.

Next, the operation (recording mode) when recording tape information will be described. In FIG. 1, in the recording mode, the switch 4 is connected to the REC side, and the tape identification code generator 7 generates a tape identification code. In the tape recording information generation 8, the main body recognizable information such as the tape counter recording date and time and the recording mode is generated and written in the area corresponding to the identification code of the memory 9. At this time, the information of a, c, d, e, f, and g in FIG. 5 is automatically written in the memory 9. The tape title of b, the subtitle of h, a memo, etc. can be input by the title input device 11 at the time of recording or after recording.

The generated tape identification code is shown in FIG.
The data is recorded on a predetermined area of the tape by the magnetic head 1 through the switch 4 → data code conversion circuit 3 → video signal processing circuit 2. At the same time, the time code d and the date and time e are also recorded on the tape. The tape title b and the subtitle h can be freely corrected and added later.

Next, the operation (playback mode) during tape playback will be described. In FIG. 1, in the reproduction mode, the switch 4 is connected to the PB side. After the reproducing operation for a certain period of time, the magnetic head 1 → the video signal processing circuit 2
→ Data code conversion circuit 3 → Switch 4 path,
The tape identification code is detected from the tape. Then, the tape identification code search block 6 searches for the same tape identification code registered in the memory 9.

When the same tape identification code is retrieved, the tape information b to h corresponding to the code is read from the memory 9 and converted into character information output by the display control block 10, and the character information mix circuit 13 is read.
Is mixed with the reproduced video signal, the video signal from the camera block 12, or the single color background signal, and output to the CRT 14.

When the tape information is recorded, a reproducing operation is performed for a certain period of time before the tape identification code is generated and recorded. It is also determined whether the tape is already registered in the memory 9 or a new tape (see the algorithm of FIG. 3). It is possible to determine that the tape is the same until the tape is subsequently taken out.
In the above algorithm, the reproducing operation performed prior to recording can be omitted.

Further, the total number of scenes of i in FIG. 5 is the same as the last number of the scene numbers of c. Since the total recording time of j has the recording time of each scene as data,
It is obtained by adding.

The tape information display request shown in FIG. 3 is based on a request signal from the system control block 15 on the main body side (FIG. 1). It is a key input or an automatic display request is made immediately after inserting the cassette. A system that issues

The present invention is not limited to the application to the system for recording and reproducing a video image signal on the magnetic tape medium described in the above embodiment, and may be applied to an apparatus for recording and reproducing only an audio signal. It can be applied.

Further, the recording medium is not limited to the magnetic tape but can be applied to a magnetic disk or an optical disk medium.

The data code recording area shown in FIG. 4A is an example, and may be of a type in which the data code is recorded in the same area as the video signal.

Further, the content of the data code may be one in which the time code, date and time, etc. are omitted if the tape identification code is included.

The algorithm of FIG. 3 shows an example of this embodiment. For example, the processing when the same code as the code detected from the tape is not registered in the memory will be described from that part. Generate new code,
It can be replaced with a process of newly registering.

[0037]

As described above, according to the present invention, the recorded information of the entire tape can be obtained only by performing a slight reproducing operation from the mounting of the tape in the apparatus to the detection of the tape identification code. be able to.

Further, rewriting or additional writing of the information once recorded can be performed in a short time without complicating the circuit because the rewriting operation of the tape itself is not involved.

Further, since the recording information is written in the memory on the side of the apparatus, a relatively large amount of information can be handled without limiting the amount of information to the size of the data code area on the tape.

Then, the tape identification code is generated, recorded,
Since the search is automatically performed, it can be easily used by anyone without requiring the user of the device to perform a special operation.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a medium recording / reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a flowchart (1) for implementing the function of the broken line portion of the configuration of FIG. 1 by software.

FIG. 3 is a flowchart (2) showing the continuation of FIG.

FIG. 4 is a diagram showing a data code for writing a tape identification code in this embodiment.

FIG. 5 is a diagram showing an example of tape information on-screen on a CRT in this embodiment.

[Explanation of symbols]

 1 magnetic head 2 video signal processing circuit 3 data code conversion circuit 4 switch 5 recording / playback timing control circuit 6 tape identification code search 7 tape identification code generation 8 tape recording information generation 9 memory 10 display control 11 tape title, scene title input device 12 camera 14 CRT 15 system control block

Claims (1)

[Claims] 1. A first means for writing and reading an identification code unique to the medium on a recording medium, and a second means for writing and reading the identification code, title, and other recording information of the medium on a memory device in the main body. Means and display means for displaying the record information written in the memory of the main body by the second means by reading the identification code from the medium by the first means. Medium recording / reproducing apparatus.