JPH0684229A - Video tape recorder - Google Patents

Abstract

PURPOSE:To easily perform the retrieval and search of recorded contents and not only to improve a method for retrieving a lot of kinds of recorded information but also to improve utilization efficiency of a magnetic tape by reading information concerning pictures and voices recorded in the magnetic tape from a storage medium added to a cassette. CONSTITUTION:At the time of reproducing, the tape position information of recording start is read from an IC memory 9 added to a cassette 1 by an IC memory connector 10, and reproducing is started from a tape position calculated by comparing the tape position information at the time of recording start with tape position information due to a tape position detecting means at an arithmetic means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video tape recorder (hereinafter referred to as "VTR") having a reproducing function, in which information on video and audio recorded on a magnetic tape is read from a storage medium attached to a cassette. By reading the recorded contents, it is possible to easily search and find the recorded contents, and the operability thereof is dramatically improved.

[0002]

2. Description of the Related Art In a conventional VTR, as a first means for retrieving information recorded on a magnetic tape, a head control signal is recorded by duty-modulating a servo control signal at the beginning of information to be taken out from a cassette tape. There is a way to do it. This is called a VHS standard VISS search function, which is the mainstream of so-called home 1/2 inch VTRs. Abbreviated) is detected and the state is changed to the stop state or the reproduction state. A second means is a linear time counter function for displaying the count value of the servo control signal. When the count value corresponds to the beginning of the information to be taken out from the cassette tape in the FF / REW state, it is stopped or replayed. Is to be transferred to.

[0003]

However, in the above-mentioned configuration, when searching the information recorded on the magnetic tape, firstly, in any case, the current absolute position of the magnetic tape is unknown. Because of this, the magnetic tape must be rewound to the beginning before the search, and there is a problem that the information to be searched cannot be obtained quickly. Second, the user can remember what is recorded on the magnetic tape so that the recorded contents such as a title can be recognized, and in the case of the counter search function, the count value is stored. Alternatively, it is necessary to write it on a label or the like and attach it to the cassette storing the magnetic tape.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a video tape recorder capable of easily searching recorded contents and finding the beginning of the recorded contents.

[0005]

In order to solve the above problems, the VTR of the present invention comprises a storage medium attached to a cassette storing index information relating to video and audio recorded on a magnetic tape, tape position information and the like. Read-out means for reading, tape position detecting means for detecting the amount of tape advance of the cassette tape or remaining tape amount, cueing signal detecting means for detecting a cueing signal recorded on the tape, and fast-forwarding the tape or The tape transfer means for rewinding and the operation means for comparing and calculating the information stored in the storage medium attached to the cassette and the tape position information detected by the tape position detection means are provided to the cassette during reproduction. The tape position information of the recording start is read from the storage medium by the reading means, and the tape is moved by the tape transfer means. Together it is, after transferring the tape position to the start position of the recording and comparison operations by the arithmetic means and the tape position information by the tape position information and the tape position detecting means at the start of recording, is configured so as to start playing.

[0006]

According to the present invention, the above-mentioned structure allows the conventional VT to be used.
In order to improve the function of retrieving the beginning of the information recorded on the magnetic tape, which was a major issue for R, the information on the recorded content is automatically read by reading it from the storage medium attached to the cassette. It searches the beginning of the information.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a video tape recorder of the present invention, which is a cassette 1 for storing a magnetic tape 2 and a rotary drum for driving a rotary head (not shown) for recording / reproducing information on / from the magnetic tape 2. 3 and
A supply-side reel (hereinafter abbreviated as S reel) 4 that feeds out the magnetic tape 2 at the time of reproduction or fast-forward, and a take-up reel (hereinafter abbreviated as T-reel) at which the magnetic tape 2 is wound at the time of reproduction or fast-forward. ) 7, a control head 8 for recording and reproducing control signals for servo, and a storage medium attached to the cassette case, such as an IC memory. (Hereinafter, a storage medium attached to the cassette is referred to as an IC memory 9.) A connection terminal 10 for reading information from the IC memory 9, a control signal recording / reproducing circuit 12, a VTR FF / REW state and a reproducing state, etc. A tape drive circuit 13 for driving a capstan motor (not shown) or a reel motor (not shown) for transferring the magnetic tape 2,
A key input device for R operation or the remote control device 14,
An on-screen display (hereinafter abbreviated as OSD circuit) 15, a video signal processing circuit 16, a monitor 17 for displaying information relating to video and audio stored in the IC memory 9 when necessary, controls the above system. And the microcomputer 11 that operates as a whole.

With the above structure, the microcomputer 11 in the VTR is attached to the cassette 1 as an IC.
The process of reading the information about the recorded contents from the memory 9, searching the information recorded on the magnetic tape, that is, the recorded video and audio, and playing it back will be described in the following utilization example.

FIG. 2 is a schematic view showing a state in which the cassette 1 is inserted into the VTR main body 18, and the IC memory 9, that is, the IC memory 9 attached to the side surface of the cassette 1 is connected when the cassette 1 is inserted into the VTR. By connecting to the terminal 10, the information can be read. Here, the information regarding the recorded contents stored in the IC memory 9 is, for example, a channel, a recording date, a recording start / end time, keyword index information and tape position information in the case of a recorded program or the like. Keywords are specific program names,
A title or the like is considered so that a user who searches for a program can easily recognize the recorded content. The tape position information is for storing where on the tape the information to be recorded is recorded, and the rotation cycle of the S reel 4 and T
By measuring the rotation cycle of the reel 5, it is, for example, the remaining tape time from the recording start position to the end of the tape.

FIG. 3 is an enlarged view of a portion of the cassette 1 of FIG. 1, and a detailed description will be given of an embodiment of the method for detecting the remaining tape time of the microcomputer 11 by using this. In FIG. 3, Vt is the running speed of the magnetic tape 2 [m /
s] and r are hub diameters [m] of the S reel 4 and the T reel 5,
Rs and Rt are the radius [m] to the outer circumference of the magnetic tape wound around the S reel 4 and the T reel 5, and Ss and S, respectively.
t is the area [m ² ] including the magnetic tape wound around the S reel 4 and the T reel 5 and the reel hub, ωs
And ωt are rotational angular velocities [rad / s] of the S reel 4 and the T reel 5, respectively.

The angular velocities ωs and ωt can be obtained by measuring the cycle of the rotation speed detection signal detected by the S reel rotation speed detector 6 and the T reel rotation speed detector 7. Therefore, the radii Rs and Rt to the outer circumference of the magnetic tape wound around the S reel 4 and the T reel 5 are obtained by the following equations.

[0012]

[Equation 1]

[0013]

[Equation 2]

Therefore, the total area S of the tape including the reel hub, which corresponds to the length of the magnetic tape wound on this cassette, is given by the following equation.

[0015]

[Equation 3]

By the way, there are several kinds of lengths of the magnetic tape wound on the cassette 1. For example, the above-mentioned VH
The S standard includes 120-minute tape, 90-minute tape, 60-minute tape, and 30-minute tape. Therefore, the total tape area S ₁₂₀ , S ₉₀ , S ₆₀ , S
If you ask for ₃₀ , cassette 1 now inserted in the VTR
Can detect how many minutes are tapes. Based on the result, the area Sso including the reel hub on the S reel side is obtained again. If, for example, the detection result is 120 minutes tape, Sso is expressed by the following equation.

[0017]

[Equation 4]

The tape remaining amount L [m] is obtained by dividing the net tape area excluding the reel hub area by the tape thickness τ [m] and the remaining time T [s] is obtained by dividing this by the tape speed. Can be calculated. That is,

[0019]

[Equation 5]

[0020]

[Equation 6]

The tape remaining amount information is obtained by calculating. As a concrete example of the memory storage system of each of the above information, FIG. 5 is a map diagram of index information and tape position information stored in the IC memory 9, where the horizontal axis is the lower address (4 bits) and the vertical axis is The upper address (3
Bit) represents the space. And 3 in FIG.
1 recorded on tape as indicated by 1, 32, 33
1 byte for each program, 3 for recording date
Bytes, 2 bytes at the recording start time, 2 bytes at the recording end time, 2 bytes for the tape position information at the recording start, 6 bytes for the program keyword, and a total of 16 bytes for one program. Also, in FIG. 5, the total memory capacity is 1
In the case of K (1024) bits, it is possible to store up to 8 programs, but an IC memory 9 having a capacity considered appropriate according to each utilization example may be attached to the cassette.

When the cassette tape having the IC memory 9 attached thereto is inserted into the VTR with these configurations, the readable state is reached as described above, and the microcomputer 11 transfers the information in the IC memory 9 read out through the connection terminal 10 to the OSD circuit 15. The screen of FIG. 7 is controlled to be displayed on the monitor 17, and the tape drive circuit 13 is controlled based on the tape position information stored in the IC memory 9 to the vicinity of the start position of the program recorded on the magnetic tape. After the transfer, the cue signal detecting means searches the beginning of the selected program and starts reproduction.

Here, the method of recording the VISS signal in this VTR and the cueing method using the VISS signal (hereinafter referred to as VI
Abbreviated as SS search. ) Will be described. At the start of recording, the microcomputer 11 records on the magnetic tape 2 a cueing signal obtained by duty-modulating the control signal by the control signal recording / reproducing circuit 12 of FIG. 1, that is, a so-called VHS VTR VISS signal. FIG. 4 shows a recording waveform and a reproducing waveform of a control signal and a recording format of the cueing signal for explaining the VISS search function for performing the cueing by duty-modulating the control signal.
When the cycle is 100%, a signal having a high level (hereinafter abbreviated as H level) period of about 60% (FIG. 4A) is a "0" pulse, and an H level period is about 27.5%. Signal (FIG. 4 (B)) is set to "1" pulse, and a cue code as shown in FIG. 4 (C) is recorded at the start of recording, that is, at the beginning of the program to be recorded. In the VISS search, the cue code is detected by measuring the duty of the reproduction control signal at the time of fast-forwarding or rewinding, and the reproduction mode is entered.

The above-described tape position information and the method for searching the beginning of the program by the VISS search function will be described in detail with reference to the flowchart of the software program incorporated in the microcomputer 11 shown in FIG. First, in processing block 111, the remaining tape amount is detected to detect the current tape position. Next, a comparison is made between the remaining tape time stored in the IC memory 9 and the current remaining tape time detected in the processing block 111, which is detected when the program selected in the branch 112 is recorded. If the position is 10 minutes or more before the target position, the process proceeds to processing block 113 to fast forward the VTR (F
F) state, and if the current position is behind the target position by 10 minutes or more, the process moves to the processing block 114 to set the VTR to the rewind (REW) state, and each of the processing blocks 1
Return to 11. The current position is 10 with respect to the target position.
If it is within a minute, the process proceeds to the processing block 115, the VTR is set to the above-mentioned VISS search state, and when the cue code of the selected program is detected, the VT is processed in the processing block 116.
R is set to the reproduction mode, and the series of search operations is completed. In other words, the position where the program is recorded is roughly detected by the tape remaining amount detecting function, and then highly accurately detected by the VISS search function.

When there are a plurality of programs recorded on the magnetic tape as one of the application examples of the above program retrieval, it is used in the VTR insertion state of the cassette tape, that is, the above-mentioned information readable state from the IC memory 9. When a person presses a key (not shown) provided in the key input device, which means program search, the microcomputer 11 controls the OSD circuit 15 to display all the program information stored in the IC memory 9. The screen of FIG. 8 is displayed on the monitor 17.
Then, when the user selects a program to be played back from the displayed programs and presses a key (not shown) indicating the start of the search, the microcomputer 11 reads out information on the selected program from the IC memory 9 and performs the above search. Similar to the method, it is also possible to search the beginning of the program and start playback.

Based on these retrieval methods, the information stored in the IC memory 9 attached to the cassette is not only numerical information about the recorded program but also the channel, date, start time of the program retrieval example. By deleting the index information such as the end time and replacing it with a memory system that enriches character information such as titles, the information in the IC memory 9 that can be recognized by the user can be viewed as if viewing the table of contents of a book or the like. It can be used and can be fully used as a so-called "video magazine" that replaces information guide magazines.

Another example of application to karaoke software will be described below. With the above-mentioned configuration, this V
When a karaoke soft tape having an IC memory 9 attached thereto is inserted in the TR, the microcomputer 11 first reads out the information stored in the IC memory 9 through the connection terminal 10 from the information stored in the IC memory 9 and the karaoke title recorded on the magnetic tape. Of the information is displayed on the monitor 17 by controlling the OSD circuit 15. (Not shown) When the user selects one song from the song names displayed on the monitor 17 and presses a key (not shown) which means karaoke start, the selected song is selected in the same manner as the program search method described above. The part in which karaoke is recorded is searched, and playback is started. Further, in the conventional karaoke software, the lyrics for the sound of the song are added and displayed in the reproduced video, but it is also one of the application examples of the present invention that the lyrics are stored in the IC memory 9 and displayed in accordance with the karaoke. I will explain as one. As a specific example of the memory system, FIG. 6 is a map diagram of index information such as song titles, lyrics data, and tape position information stored in the IC memory 9, where the horizontal axis is the lower address (4 bits) and the vertical axis is the vertical direction. The space is represented by the upper address (7 bits) of the axis.
As shown by 41 to 43 in FIG. 6, 14 bytes are used for the song name recorded on the tape, and 2 bytes are used for the tape position information where the beginning of the song is recorded. It uses 14 bytes for lyrics and 2 bytes for tape position information. During reproduction, the OSD circuit 15 of FIG. 1 displays the image on the monitor 17 together with the image of the magnetic tape. The tape position information is also added to the lyrics information storage portion because the tape position information being reproduced by the microcomputer 11 and the IC memory 9 are stored so that the lyrics can be displayed with respect to the reproduced voice of the song without deviation. By constantly comparing the existing tape position information, it is possible to control the display of songs in phrase units.
Further, as the lyrics, for example, two kinds of languages such as Japanese indicated by 42 and English of 43 are stored in the IC memory 9, and the lyrics desired by the user are selected at the same time when selecting a song, whereby the microcomputer 11 It is also possible to start reading from the address 42 or 43 of the IC memory 9 in which the selected lyrics are stored, and display it on the monitor 17 together with the image and sound of the magnetic tape.

[0028]

INDUSTRIAL APPLICABILITY As described above, the present invention retrieves recorded contents by reading the information about the video and audio recorded on the magnetic tape from the storage medium attached to the cassette.
Cueing can be performed easily, and excellent operability that improves the search method of individual recorded information can be realized.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of a video tape recorder of the present invention.

FIG. 2 is a schematic view showing a state where a cassette is inserted into the VTR main body of the same embodiment.

FIG. 3 is an enlarged view of a cassette portion of the same embodiment.

FIG. 4 is a recording format diagram of a control signal recording waveform and a cueing signal for explaining the VISS search function of the embodiment.

FIG. 5 is a map diagram of index information and tape position information stored in the IC memory of the embodiment.

FIG. 6 is a song title stored in the IC memory of the embodiment.
Map of lyrics information and tape position information

FIG. 7 is a display example of a monitor screen at the time of program search of the embodiment.

FIG. 8 is a monitor screen display example at the time of program search when there is a plurality of pieces of information regarding recording in the embodiment.

FIG. 9 is a flowchart of a software program incorporated in the microcomputer of the embodiment.

[Explanation of symbols]

 1 Cassette 2 Magnetic Tape 3 Rotating Drum 4 Supply Side Reel 5 Winding Side Reel 6 Supply Side Reel Rotation Speed Detector 7 Winding Side Reel Rotation Speed Detector 8 Control Head 9 IC Memory 10 IC Memory Connection Device 11 Microcomputer 12 Control Signal recording / reproducing device 13 Tape drive circuit 14 Key input device 15 On-screen display circuit 16 Video signal processing circuit 17 Monitor

Claims (2)

[Claims] 1. A reading means for reading information from a storage medium attached to a cassette storing index information and tape position information relating to video and audio recorded on a magnetic tape, and the amount of advance of the cassette tape or the tape. A tape position detecting means for detecting a remaining amount position, a cue signal detecting means for detecting a cue signal recorded on the tape, a tape transferring means for fast-forwarding or rewinding the tape, and a memory attached to the cassette. A calculation means for comparing and calculating the information stored in the medium and the tape position information detected by the tape position detection means,
At the time of reproduction, the tape position information at the start of recording is read by the reading means from the storage medium attached to the cassette, the tape is moved by the tape moving means, and the tape position information at the start of recording and the tape position detecting means are used. The tape position information is compared and calculated by the calculating means, the tape position is moved to the vicinity of the recording start position, and reproduction is performed from the tape position where the cueing signal recorded on the tape is detected by the cueing signal detecting means. A videotape recorder characterized in that it is arranged to start. 2. A read-out means for reading out information from a storage medium attached to a cassette, which stores index information such as song titles and the like relating to video and audio of karaoke recorded on a magnetic tape and tape position information, and read out by the read-out means. Display means for displaying the displayed information on the monitor, input means for selecting the video and audio of karaoke to be reproduced,
A tape position detecting means for detecting the advanced amount or the remaining tape position of the cassette tape, a cue signal detecting means for detecting a cue signal recorded on the tape, and a tape transfer means for fast-forwarding or rewinding the tape. And a calculating means for comparing and calculating the tape position information at the start of recording the karaoke video and audio stored in the storage medium of the cassette and the tape position information detected by the tape position detecting means, and at the time of reproduction. The tape position information at the start of recording is read from the storage medium of the cassette by the reading unit, the tape is moved by the tape transfer unit, and the tape position information at the start of recording and the tape position information by the tape position detection unit are recorded. Is calculated by the calculation means and the tape position is recorded to record the video and audio of karaoke. Start position is transferred to the vicinity of a video tape recorder which is characterized by being configured to start playback from the tape position detected cueing signal recorded on the tape by the cueing signal detecting means.