JPS60131691A - Video tape recorder - Google Patents

Abstract

PURPOSE:To enable accurate and quick automatic retrieval of desired information by recording index data having count value that indicates items of information recorded in a recording medium and position of each item on the recording medium together with video signals. CONSTITUTION:A video tape VT is sent to recording position of index data ID and VTR is made reproducing mode. The index data are extracted from video signals by a sampling circuit 10, sent to a controlling device 2 and written in a memory of said device 2. Here, desired number is inputted by a keyboard 3. The controlling device 2 reads corresponding tape count value X from index data of the memory. The controlling device 2 reads the content of soft identification data S of reference data, and reads out corresponding controlling program from the memory of the controlling device 2 and controls the body 1 of VTR. As retrieving is made referring to count value and items, desired information can be retrieved quickly and accurately by simple operation.

Description

[Detailed Description of the Invention] [Technical Field 1] This invention relates to a video tape recorder (hereinafter referred to as VTR).
The present invention relates to an information retrieval device.

[Prior Art 1] There is no known conventional consumer \/TR that can automatically search to reproduce desired information from among the information recorded on a videotape.

Therefore, in order to play back a desired image using a conventional VTR, one must manually set modes such as fast forward and rewind, and while watching the tape running counter etc., feed the videotape to the desired position and play back the image. Searches were performed by looking at the information and determining whether it was the desired item. Such manual searches take a long time to complete and are also unreliable.

Group 1 An object of the present invention is to provide a VTR that can automatically, accurately, and quickly search for desired information.

[Configuration 1 An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a known VTR body that records and plays video information and audio information on a videotape.
Terminal 1a outputs the video signal including the synchronization signal, 1b is the video signal input terminal of \/TR-\, 1
c is the current position of the videotape (VT
Id is a terminal for outputting a reel pulse representing the position on the video tape facing the R video head, and Id is an output terminal for a signal indicating forward or reverse rotation of the video tape.

2 is a control device using a computer with a microphone, 3 is a keyboard including a numeric keypad for data input, and 4 is a data display device.

As will be described in detail later, the display state of the television image differs depending on the type of information recorded on the videotape, for example for educational learning, advertising, karaoke, etc. I remember the control program. As will be described in more detail later, there is control for sending search index data entered via the keyboard to the VTR main body 1 and writing it onto the videotape, and
It stores a program for performing control to search for videotape position information determined by search data and reel pulses, and a desired videotape position when reproducing R.

5 is the same W separation circuit that notarizes and extracts the horizontal synchronizing pulse Hsync and vertical synchronizing pulse VSylIC from the video signal sent from the VTR main body; 6 is the same W separation circuit; 14.3]8
This is a single pulse oscillator of N11z. 7 is a timing signal generation circuit, which outputs pulses etc. obtained by dividing the frequency of the Key-1 signal shown in FIG. 2S) and the output of the oscillator 6 by J/].
Ru. Reference numeral 8 denotes a shift register for storing index data outputted from the control device 2, and the output of this shift register 8 is transferred via an analog switch 9 that is turned on at the timing of writing to a predetermined position on the video tape. \
Sent to 7TR main unit 1.

1() is a data extraction circuit that extracts index data output from the VTR body 1 when searching a videotape, and the data extracted here is transferred to the shift register 11.
is inputted to the control device 2 via.

In the second embodiment, the writing of index data will first be described. A video tape on which various program sources have been recorded is set on the VTR1, and index data is input using the keyboard 3.

The index data has the structure shown in Figure 2. When the program source recorded on the videotape is, for example, an educational program and the contents are divided into chapter 0 and lesson 0, The number data indicating the chapter and section, the tape counter value of the tape position where each chapter and section starts, and the data CRC for error detection are combined to form a tR.

On the other hand, the videotape is played back, the tape counter values of each chapter and each section are memorized, and the chapter number, section number, and tape counter value are input using the numeric keypad 3. These input data are stored in a memory within the control device. The input data is displayed on the display 4.

Next, set the videotape at the starting position, call up the menu recording part of the program source, and turn on the start key (not shown) in the keyboard 3.
\7TR body 1 is set to recording mode.

And each chapter stored in the memory in the control device 2,
The index data of each section is read out to the shift register 8 for one section at a time, and is passed through the analog switch ≦ to 7.
1 is sent to the TR main body 1, and 1 is sent to the starting end of the videotape VT.
Starting from chapter 1, all the lessons are divided into inches; Since this index data cannot be error-free, the same index data is inserted and stored multiple times in order to prevent errors due to dropouts and the like.

-j: Since the section 1'D in which the menu of the program source is written is used, the index data recording position j, for example, vertical return, should be set so that the index data does not appear on the TV screen. Line period 18
One horizontal scanning period is the previous one or one horizontal scanning period later.

Next, reference data as shown in FIG. 1 is recorded in each search image information of the program source, for example, in the heading section provided for each section.

To record this reference data, manually play the videotape, find the heading section for each section, and then enter the chapter number, section number, and program identification code S again from the keyboard 3 as reference data. is recorded on the videotape VT for the period 11-1 in the same way as the index data. The reference data is like a name given to each piece of search image information, and is used to distinguish it from the image information of a pond.

Note that a code S for software identification is also written in the reference data. The software identification code indicates the content of the program source. For example, if it is an educational video tape, it is "OO (l O"), if it is a karaoke video tape, it is "Q 001", etc. By using ``1)000'' to ``1111'', 16 types of program sources can be identified.

Next, a case will be described in which a video tape on which index data and reference data are recorded as shown in (-) is played back.

The videotape is set in the VTR main body 1, and the videotape is set at the starting position.

By forging the start key on keyboard 3, the video tape VT is sent to the recording position of index data l, and V
Set T Ri to playback mode. Then, index data is extracted from the video signal read from the video tape by the extraction circuit 1 (), and the extracted index data is sequentially sent to the control device 2 via the Schiffrunster 11 and stored in the memory in the control device 2. Write. When all the index data has been written into the memory, the control device 2 sends a stop signal to the TR main body 1 by 5:5, and then
Stop TR once.

Here, the user inputs the desired chapter number and section number using the keyboard 3. For example, if Togi wants to read Chapter 1, Lesson 2, he inputs 1 and 2 using the keyboard. Data entered from the keyboard is displayed on the TV screen in the form of a table of contents. - In the force control device 2, the tape count value X corresponding to the above section 1, section 2 is read out from the index fJ% stored in the memory.

Then, set \7TR to fast forward mode, and send the reel pulse obtained from terminal 1c of Xi TR main body 1 to control device 2.
The videotape is counted and compared with the read count value X, and the videotape is fed 9 times 1) until the tape count value reaches the X place 1d. When the tape position is changed, the control device 2
switches the VTR body 1 to playback mode and plays back the video signal from the videotape. Reference data is extracted from this video signal by a data extraction circuit 6, and is input to the control device 2. The control device 2 inputs the data representing the chapter and section of the extracted reference data and the data [11 and [2-] inputted by the keyboard 1S3.
1 and if they match, set the R to still playback mode and play the heading "Chapter 1, Lesson 2-1" written on the videotape at that position on the TV screen. do.

When the user sees this heading and presses the start key, the control device 2 sets the VTR body 1 to playback mode and plays back the contents of Chapter 1, Section 2.

- The power control device 2 reads the contents of the software identification data S among the contents of the reference data, reads out a control program corresponding to the contents from the memory of the control device 2, and controls the VTR main body 1 with this software. Control according to the control program.

That is, for example, if the videotape is for educational purposes, when a desired chapter and lesson are selected as described in (-) above, the lecture for that lesson is first played back in the normal playback mode.

And the section value of the reference data is ′”f) f'l
”, the control device 2 switches the \7TR main body 1 to still playback mode and displays the problem. After that, when the user has finished solving the problem, when the user inputs the star 1 command using the start key of the keyboard 3, \j゛'The R main unit 1 is switched to the normal playback mode, and the answer is explained1゜Figures 5 and 6 are diagrams showing a part of the circuit in Figure 1 in more detail, and the synchronization Separation circuit 5: The horizontal synchronization signal Hsync is input from +211 to input C of input terminal 20.
Applied to LK and vertical same jjll signal~'5
lllle is applied to the lower resen terminal of the counter.

When the counter 2O counts 12 horizontal synchronizing signals after the vertical iU blanking period, it generates a pulse, and this pulse drives the monostable multivibrator 21 with a width of one day, and the gate shown in FIG. 7 (8) is generated. Outputs pulses.

n11 where the gate pulse is L” (low level)
1. tNAND key') 22 is enabled,
A pulse obtained by dividing the output pulse of the oscillator 6 by 1/16 by a frequency divider 6a is supplied to the CRC generation circuit 26 and the shift register 8 via the NAND gate 24 as a clock signal.

In addition, during the period when the gate pulse becomes 'IT' (high level), the output of the inverter 25 becomes "Ln", the NAND gate 23 becomes enabled, and the microcomputer as the control device 2 The output clock pulse is supplied to the CRC generation circuit 26 and shift register 8 via NAND gates 23 and 24.

The 32-bit index data output from the control device 2 is applied to the CRC generation circuit 26 and converted into a CRC for error detection.
The RC data is added, and the ``2'' gate signal becomes ``I(''
During the period when , the pulse is supplied to the shift register 8 as shown in FIG. The date signal is “’
l (opens the index data) I-
It is sent to the amplifier 29 during the period I.

On the other hand, the video signal obtained from the VTR body 1 is clamped to a predetermined level by the clamp circuit 30, and the clamped video signal is opened when the inverted signal of the gate signal, which is the output of the monostable multi-bi break 21, is ``II''. It is applied to the amplifier 29 via the analog switch 9b.

The video signal shown in FIG. 7 (0) is transferred from the amplifier 29 to
It is input to the TR body 1.

In FIG. 6, the data extraction circuit 10 uses a clamp circuit 31 to clamp the video signal including the index data obtained from the TR main body 1 to a constant level, and the level determination circuit 32 uses the clamped video signal and the reference voltage
7 and εF are compared to output the index data ID shown in (6) in FIG.

The reel pulses and forward/reverse signals sent from the R main body 1 are waveform-shaped by the waveform vertical circuits 32 and 33, respectively, and input into the control device 2.

[Effect 1 As described in detail below, this invention provides information items recorded on a recording medium (debt, section in the embodiment) and a count indicating the f☆ position of each item on the recording medium-1-. The index data having the values n, ! is recorded on the recording medium together with the video signal and searched n,! In f, the desired information is searched by referring to the count value and item, so it is easy to use ().
It is possible to provide a recording and reproducing device that can quickly and easily search for desired information with a single operation.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of a video tape recorder according to the present invention, FIG. 2 is a data arrangement diagram showing an example of the format of index data used in the embodiment of FIG. FIG. 4 is a data layout diagram showing the recording method of index data recorded on tape. FIG. 4 is a data layout diagram showing the reference data former 71. FIGS. Show details 1
The circuit diagram, FIG. 7, is a waveform diagram showing an example of the output waveform of the circuit shown in FIGS. 5 and 6. 1...C"TR12...Control device, 3...Keyboard, 5...Synchronous S1 circuit, 8.II...Shift register, 5]...Analog switch, 1o...
Sampling circuit. Patent Applicant: Ricoh Co., Ltd. Agent Blue 1) 1 Written amendment to the proceedings by one person, E. 1 Display of the case 1982 Patent Application No. 241394 2 Name of the invention Videotape recorder 3 Person making the amendment Related Patent applicant representative Hama 1) - Da 4, Agent 5 Date of amendment order: Voluntary 6 Subject of amendment: Detailed explanation of the invention in the specification & 7, Contents of amendment (1) Specification No. 4 Page 5 line ``Figure 2-1''
7 Corrected to Figure 1. (2) Page 11, lines 1 to 5 [“L” (low level)
-1 was corrected to [“”II” (high level)]. (3) Page 11, line 1 () [“’H” (high level)]
” has been corrected to 1 “L” (low level). (4) Page 11, line 11 [“L”J and 1”’
Corrected to H”l.

Claims (1)

[Claims] (1) A recording means for recording index data on a recording medium, which includes items of information to be recorded on the recording medium and values representing their recording positions; an input means for inputting desired items; a control means that fast-forwards the recording medium to a recording position corresponding to the item, then compares the input item with the item recorded on the recording medium, and controls the video tape recorder to a playback mode when the two items match; A videotape recorder comprising: