JPH0256791A - Video tape recorder - Google Patents

Abstract

PURPOSE:To prevent index information from being erroneously erased and to rapidly and accurately obtain the index information by classifying the index information by address and cassette identification information corresponding to a program searching signal and writing it in a memory. CONSTITUTION:A bar code reader 2 reads the bar code 121 of a tape cassette and the data S1 is outputted to a MCPU 1. The MCPU 1 reads out the index information S2 corresponding to the data S1 from an EA-ROM 7 and gives the information S2 to a CRT control circuit 6. The information is converted into a video signal to be displayed on a monitor 13 through a switch 8 and a video circuit 9. In the case of converting the information, the information S2 is classified by the address information of the program searching signal VASS. At the time of retrieving the video signal corresponding to the information S2, a user specifies the address information of a signal VSS to the MCPU 1 from a key input device 3 so as to control a tape driving circuit 10 to feed a tape. A detection circuit 5 outputs detection data S3 and the MCPU 1 receives it. When the data coincides with the address specified by the user, a VPR is set in a reproducing mode.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a video tape recorder (VTR) having a tape information retrieval function.

(Prior Art) Conventionally, as a means to quickly retrieve information recorded on a magnetic tape (hereinafter simply referred to as tape), VTRs have been equipped with VRSS or VRS at the beginning of the information to be retrieved from the tape.
There is a method of inputting cue signals such as those found in ASS. Therefore, in order to search the information recorded on the tape as described above, all the information related to the video signal recorded on the corresponding tape is extracted using the cue signal and indexed at the beginning of the tape. There are things to record as information.

However, in the conventional method described above, the index information is recorded at the beginning of the tape, so in order to obtain the index information it is necessary to rewind the tape to the beginning, and there is a risk of accidentally erasing the index information. there were. Furthermore, when the index information is video information, there is a problem in that it is difficult to understand the recorded information.

(Problems to be Solved by the Invention) As mentioned above, in conventional VTRs that record index information at the beginning of the tape for searching video information recorded on the tape, the tape is moved to the beginning in order to obtain the index information. It has the disadvantage that index information cannot be obtained quickly because it requires rewinding. Furthermore, since the index information is recorded on an erasable tape, there is a possibility that the index information may be erased by mistake. SUMMARY OF THE INVENTION The present invention aims to eliminate the above-mentioned drawbacks, and aims to provide a video tape recorder that can prevent erroneous deletion of index information and can quickly and accurately obtain index information.

[Structure of the Invention] (Means for Solving the Problems) The present invention provides a video tape recorder having a function of writing/reading a cue signal to/from a magnetic tape to cue information recorded on a magnetic tape. information acquisition means for inputting or collecting index information regarding this information when recording information on a tape; a non-luminescent memory for reading and writing index information; cassette identification means for identifying an inserted tape cassette; and said information acquisition means. writing means for classifying the index information acquired in the step by the address corresponding to the cue signal and cassette identification information from the cassette identification means and writing it into the non-luminescent memory; and cassette identification from the cassette identification means. reading means for reading out corresponding index information from the non-luminescent memory based on the information; signal processing means for converting the index information read by the reading means into a video signal and outputting it to a monitor; an address specifying means for specifying an address corresponding to a cue signal indicated by the index information; a cue signal detecting means for detecting the cue signal corresponding to the address designated by the address specifying means from the magnetic tape; and a reproducing means for reproducing recorded information on the magnetic tape that is included after the cue signal and outputting it to the monitor when the cue signal is detected by the cue signal detecting means. have.

(Operation) In the video tape recorder of the present invention, the information acquisition means inputs or collects index information regarding the information when recording the information on the tape, and passes this to the writing means. The writing means classifies the index information acquired by the information acquisition means according to the address corresponding to the cue signal and the cassette identification information from the cassette identification means, and writes the classified information into the non-luminous memory. The reading means reads out the corresponding index information from the non-luminescent memory based on the cassette identification information from the cassette identification means, and passes this to the signal processing means.

The signal processing means converts the index information read by the reading means into a video signal and outputs it to a monitor.

The address designation means specifies an address corresponding to the cue signal indicated by the index information displayed on the monitor, and supplies it to the cue signal detection means. When the cue signal is detected by the cue signal detection means, the playback means reproduces recorded information on the magnetic tape that is included after the cue signal and outputs the reproduced information to the monitor.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the video tape recorder of the present invention. 1 is a microcomputer that controls recording, playback, index information search operations, etc. of the VTR; 2 is a barcode reader that reads the barcode 121 displayed on the tape cassette 12; 3 is a keypad that inputs index information, etc. Device. 4 is a control head for recording/reproducing cue signals or control signals, etc.; 5 is a cue signal generation and detection circuit for generating cue signals or detecting cue signals; and 6 is a monitor for input data (CRT); ) to convert it into a video signal that can be displayed on
RT control circuit, 7 is a volatile memory in which index information is read and written (here, EA-ROM>, 8
9 is a switch for displaying or not displaying index information; 9 is a video circuit that processes a video signal input from the video head 11 or CRT control circuit 6 and outputs it to a monitor; 10 is a switch for fast forwarding, rewinding, etc. of the tape; 11 is a video head for recording/reproducing video signals; 12 is a tape cassette on which a bar code 121 is displayed; 13 is a monitor for displaying index information or projecting video information.

FIGS. 2A and 2B are diagrams showing details of the vicinity of the cassette insertion slot of the VTR equipped with the barcode reader 2 shown in FIG. Reference numeral 14 denotes a housing portion of the VTR, and a cassette insertion slot 15 is provided on the front surface. Cassette insertion slot 15
A tape cassette 12 is inserted into the tape cassette, and a barcode 121 is affixed to this tape cassette.The barcode 121 is read by the barcode reader 2 while the tape cassette 12 is inserted and settled in a fixed position. It will be done.

However, (a) and (b) show other positions where the barcode reader 2 can be attached.

Next, the operation of this embodiment will be explained. In this example, a bar code is displayed (affixed) on the surface of the tape cassette 12 as an identification mark to distinguish individual video tapes. First, to reproduce index information, when the tape cassette 12 shown in FIG. 1 is inserted into the cassette insertion slot 15 shown in FIG. and stored in the fixed position. Therefore, while the tape cassette 12 is moving vertically, the barcode reader 2
is the barcode 1 displayed on the tape cassette 12.
21 and outputs the resulting data S1 to the microcomputer 1 shown in FIG. It is applied to the control circuit 6.

The CRT control circuit 6 converts the input index information S2 into a video signal and outputs it to the video circuit 9 via the switch 8. During this conversion, the index information is classified by the address information of the cue signal VASS. When the switch 8 is closed, the video signal corresponding to the index information S2 is input to the video circuit 9, processed, and then output to the monitor 15 for display. Here, whether or not to display the index information is selected by opening and closing the switch 5. In this way, the index information displayed on the monitor 13, such as recording date, recording start/end time, tuning number, title, V
When searching for video information corresponding to the index information using the address of the ASS, etc., the user specifies the address information of the cue signals VA and SS to the microcomputer 1 using the key manual device 3. Upon receiving this, the microcomputer 1 controls the tape drive circuit 10 to send the tape. At this time, the control head 4 reproduces the cue signal and outputs it to the cue signal generation and detection circuit 5. The cue signal generation and detection circuit 5 outputs detection data S3 to the microcomputer 1. If the input data S3 matches the address designated by the user, the microcomputer 1 puts the VTR into playback mode. As a result, the video information recorded after the cue signal is reproduced by the video head 11, inputted to the video circuit 9, and displayed on the monitor 13 after being subjected to various processing.

On the other hand, when recording index information, when the VTR starts recording a video signal, the microcomputer 1 finds an unused address among the addresses of the cue signal VASS and cues the cue signal corresponding to this address. A cue signal generation/detection circuit 5 generates a signal, and the signal is automatically recorded on a control track of the tape via a control head 4. At the same time,
The microcomputer 1 reads the VASS data to be recorded on the tape and index information such as the date and time of video recording start, and the channel selection number from a timer circuit (not shown) and writes them into the EA-ROM 7. Finally, at the end of recording the video, the microcomputer 1 reads the end time from the timer circuit, etc., and registers [^-ROH].
Write to 7.

It should be noted that the user can add or delete index information such as a title from the key-powered device 3 after setting the microcomputer 1 to the index information write mode using the key-powered device 3.

According to this embodiment, in order to store the index information in the EA-ROM 7 instead of on the tape, the cue signal VASS
If the address of E is specified, the E
Corresponding index information can be read from the A-ROM 7 and displayed on the monitor 13 quickly and accurately. Furthermore, since the index information is written in the EA-ROM 7, erroneous erasure of the index information can be avoided.

It should be noted that, instead of the EA-ROM, any memory that can be read and written may be used as the non-luminous memory, such as a power supply backup RAM.

[Effect of the Invention J As described above, according to the VTR of the present invention, it is possible to prevent index information from being erased erroneously and to obtain index information quickly and accurately.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the VTR of the present invention, and FIG. 2 is a diagram showing a detailed example of the bar code reader section of the VTR shown in FIG. 1...Microcomputer 2...Barcode reader 3...Key manual device 4...Control head 5...Cueing signal generation, detection circuit 6...CRT control circuit 7...EA- ROM 9...Video circuit 13...Monitor agent Patent attorney Noriyoshi Chika Yudo Hiroshi UjiFigure 1

Claims (1)

[Claims] In a video tape recorder equipped with a function of writing/reading a cue signal on a magnetic tape and cueing information recorded on a magnetic tape, information acquisition for inputting or collecting index information regarding this information when recording information on a tape. means for reading and writing index information; cassette identifying means for identifying the inserted tape cassette; writing means for classifying and writing into the non-luminous memory based on cassette identification information from the cassette identification means; and writing means for writing corresponding index information from the non-luminous memory based on the cassette identification information from the cassette identification means. a readout means for reading, a signal processing means for converting the index information read by the readout means into a video signal and outputting it to a monitor, and an address for specifying an address corresponding to a cue signal indicated by the index information displayed on the monitor. a specifying means; a cue signal detecting means for detecting the cue signal corresponding to the address designated by the address specifying means from the magnetic tape; and the cue signal is detected by the cue signal detecting means. and a reproducing means for reproducing recorded information on the magnetic tape that is entered after the cue signal and outputting the reproduced information to the monitor.