KR100263158B1 - Video recorder and video playback equipment - Google Patents

Abstract

PURPOSE: A recording device and a reproducing device for images are provided to simply detect and reproduce a selected image from a recording medium. CONSTITUTION: A first memory(22) stores an image of an image signal. A second memory(24) stores a reduced image of the image in the first memory. A recording control unit stores the image in the first memory while supplying the reduced image of the first image to the second memory, when a recording start command is applied thereto. In case of completing recording of the image, the reduced image in the second memory is recorded on the recording medium. Therefore, contents of the image recorded in the recording medium are conveniently recognized by displaying a detect image recorded on the recording medium.

Description

Video recording device and video playback device

The present invention relates to an image recording apparatus and an image reproducing apparatus, and more particularly, to an image recording apparatus and an image reproducing apparatus capable of retrieving and reproducing a desired image from a recording medium on which an image is recorded.

In a digital recording VCR (Video Cassette Recorder), a method of retrieving an image recorded on a magnetic tape cassette, in which an index code is recorded before recording an image on the magnetic tape, the index code is retrieved during reproduction, and detected. The function of selecting a playback start video program is realized by displaying the number of times.

A method of recognizing a recording start point is also realized by recording an index plug at a recording start point and detecting the plug at the time of reproduction.

In addition, a method has been proposed in which a function of displaying an image of this part is provided each time this plug is detected, thereby facilitating detection of the playback part.

In the case of recording the index plug with the start of recording, for example, in the case of the VHS-VTR, the duty ratio of the controller signal is changed to the index plug, and during playback, the number of index plugs is input. Play it.

Alternatively, a small screen is displayed by sampling an image of the point of time when the index plug is detected, and one screen is displayed together with the screen of the plug position detected before or after that. The method of selecting is implemented.

By the way, in order to perform the above operation, it is not determined whether the first screen is the video which the operator really wants to reproduce. In addition, if you want to select while viewing the first video of all programs, it is necessary to search all the tapes at once.

In addition, when a detection error occurs because the search is performed at the relative position, there is a problem such as playing a misaligned video.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object thereof is to provide a video recording apparatus and a video reproducing apparatus which can easily and reliably search for a desired video program.

1 is a block diagram according to an embodiment of the present invention.

FIG. 2 is a block diagram illustrating the signal processing circuit of FIG. 1.

3 is a data configuration diagram of one track of a digital VCR.

4 is a data configuration diagram of a sub code.

5 is a data configuration diagram of a maker code pack.

6 is a data configuration diagram of an index pack.

7 is a data configuration diagram of a small screen index pack.

8 is a data configuration diagram of a small screen index switch pack.

9 is an operation flowchart of recording start of a control unit according to an embodiment of the present invention.

10 is an operation explanatory diagram of a small screen recording method according to an embodiment of the present invention.

11 is an operation flowchart when recording is terminated by the control unit according to the embodiment of the present invention.

12 is an operation flowchart of the magnetic tape cassette discharge of the control unit according to an embodiment of the present invention.

Fig. 13 is an operation flowchart when the magnetic tape cassette is inserted by the control unit according to the embodiment of the present invention.

14 is an operation flowchart of a search instruction of a control unit according to an embodiment of the present invention.

Fig. 15 is an operation flowchart during reproduction of the control unit according to the embodiment of the present invention.

<Explanation of symbols for main parts of drawing>

1: Digital video cassette 2: Tape cassette

3: magnetic tape 4a, 4b: reel

5a to 5d: rollers 6a to 6c: pole

7: rotating drum 8: capstan

9: capstan roller 10: drum motor

10a: rotating shaft 11a, 11b: magnetic head

12: drum servo circuit 13: rotation detection element

14 head amplifier 15 equalizer

16: change modulator 17: capstan servo circuit

18: signal processing circuit 19: control panel

20: mounting detection unit 21: digital signal processing unit

22: first memory 23: sampling unit

24: second memory 25: sub code processing unit

26: RAM 27: input and output unit

28: control unit

In order to achieve the above object, a feature of the present invention as set forth in claim 1 includes a first memory for holding a screen in the video signal and a plurality of small screens for reducing a screen held in the first memory. When there is a memory of 2 and a recording start instruction, the screen of the video is held in the first memory, the screen held in the first memory is reduced and supplied to the second memory, and the recording medium And recording control means for controlling the recording means to record the small screen held in the second memory on the recording medium when the recording of the video is finished.

According to claim 1, in the case of recording an image on a recording medium, the screen of the video at the start of recording is held in the first memory, the screen is reduced and recorded in the second memory, and the recording medium is discharged. By recording the search screen held in the second memory at the time on the recording medium, the content of the video recorded on the recording medium can be easily recognized by displaying the search screen recorded on the recording medium at the time of reproduction.

Claim 2 is characterized in that when the recording control means records the search screen held in the second memory on the recording medium, information for recognizing that the small screen is recorded is recorded in the information of the small screen. It is done.

Therefore, by recognizing the information that the recorded search screen is recorded along with the information of the search screen at the time of reproduction, the position where the search screen on the recording medium is recorded can be easily recognized, and the search by the search screen is performed. It can be performed easily.

The method according to claim 3, wherein when the screen is supplied from the first memory to the second memory by the recording control means, the position on the recording medium of the video including the screen of the first memory is recorded. It features.

Therefore, by recording the position in the recording medium of the small screen, it is possible to easily search for the necessary video from the search screen.

The apparatus according to claim 4, further comprising: reproducing means for reproducing a recording medium on which a video and a desired screen of the video are recorded on a small screen, small screen detecting means for detecting the small screen from a reproduction signal of the reproducing means, and the small screen detecting means. The small screen position storage means for storing a position on the recording medium of the small screen when the small screen is detected by the small screen, the small screen storage means for storing the small screen read by the reproduction means, and the video. A search instructing means for searching for a desired video from the list and performing a search instruction, and reading the position on the recording medium of the small screen stored in the small screen position storage means when the search instruction is made by the search instructing means; The playback means is controlled in accordance with the position on the recording medium of the search screen stored in the small screen position storage means, and the small picture is stored from the recording medium. Reads the surface, it characterized in that it comprises a sikineunneun search means storing the predetermined screen has been read out by the reproducing means on the small-screen storage means.

Therefore, since the small screen recorded on the recording medium can be searched and the small screen can be reproduced in response to the search instruction, the small screen can be searched for by the small screen, thereby facilitating the search of the image.

5. The apparatus according to claim 5, wherein, when said searching means instructs said searching means, among the small screen positions held in said small screen position storing means, the position of said recording medium currently being reproduced by said reproducing means is the most. The small screen is read from the small screen position of the adjacent position and stored in the small screen storage means.

Therefore, when the search instruction is made by the search instruction means, the small screen is read out from the small screen position at the position closest to the position of the recording medium currently being reproduced among the small screen positions retained in the small screen position storage means. Therefore, the small picture can be played back quickly, and therefore, the video can be searched quickly.

The reproducing means stops the reproducing of the image by the reproducing means when the reproducing means is reproducing the image from the recording medium by the reproducing means. The small screen stored in the small screen storage means is reproduced.

Therefore, the small screen can be reproduced quickly and the video can be retrieved quickly.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Here, as a video recording device and a video reproducing device, a digital video cassette recorder (VCR) will be described as an example.

1 is a block diagram showing an embodiment of the present invention.

The digital VCR 1 of this embodiment is equipped with a tape cassette 2 for digital VCR. In the tape cassette 2 for digital VCR, the magnetic tape 3 is accommodated in the state wound by the reels 4a and 4b.

The magnetic tape 3 is loaded by the rollers 5a, 5b, 5c, 5d and poles 6a, 6b, 6c with the tape cassette 2 for the digital VCR mounted on the digital VCR 1, A predetermined tape path is formed and wound on the rotating drum 7 over a predetermined winding angle.

In addition, the magnetic tape 3 is sandwiched by the capstan 8 and the capstan roller 9 on the winding reel 4b side rather than the rotation drum 7 of the tape path, and the capstan 8 rotates, thereby maintaining a constant. It is wound at traveling speed.

The rotary drum 7 is rotated at a predetermined rotational speed by the drum motor 10. The magnetic heads 11a and 11b are fixed to the rotating drum 7 symmetrically with respect to the rotating shaft 10a. As the drum motor 10 rotates, the rotating drum 7 rotates, and the magnetic heads 11a and 11b slide with respect to the magnetic tape 3 at a predetermined speed.

At this time, the drum motor 10 is driven in response to a drive signal supplied from the drum servo circuit 12. The drum servo circuit 12 is connected to the rotational speed detection element 13 for detecting the rotational speed of the drum motor 10, and performs servo control so that the rotational speed of the drum motor 10 is constant.

The magnetic heads 11a and 11b are connected to the head amplifier 14. The head amplifier 14 converts and amplifies an information signal that must be supplied to the magnetic heads 11a and 11b into a current, supplies the magnetic signals to the magnetic heads 11a and 11b, and also detects the currents detected by the magnetic heads 11a and 11b. Amplify the output.

The output signal of the head amplifier 14 passes through the equalizer 15 and is supplied to the modulation / demodulation circuit 16. That is, the equalizer 15 equalizes the signal from the head amplifier 14 into a demodable signal and supplies it to the demodulation circuit 16.

The output signal of the head amplifier 14 is also supplied to the capstan servo circuit 17. The capstan servo circuit 17 controls the rotation of the capstan 8 such that the traveling speed of the magnetic tape 3 is constant according to the output signal of the head amplifier 14.

The demodulation circuit 16 demodulates the signal supplied from the equalizer 15, restores the original digital signal, supplies it to the signal processing circuit 18, and modulates information to be recorded from the signal processing circuit 18. The head amplifier 14 is supplied.

The signal processing circuit 18 is provided between the modulation and demodulation circuit 16 and the input / output terminals (Tin and Tout). The information is compressed during recording, the information is expanded during reproduction, error correction of codes, and video and audio signals shuffled. In addition to the above processing, a search screen is created to facilitate the search of an image, a search process by the search screen, a sub code process, and the like.

The operation processing control signal is supplied to the signal processing circuit 18 from the operation unit 19. The operation unit 19 performs recording instruction information for instructing to record the image on the magnetic tape 3, retrieval screen instruction information for sampling the image and registering the image on the search screen, and reproducing instruction for reproducing the image from the magnetic tape 3; The instruction information and the like are supplied to the signal processing circuit 18 in accordance with the operator's operation.

In addition, the signal processing circuit 18 is connected to the capstan servo control circuit 17 to control the rotational speed of the capstan 8, thereby enabling control of the traveling speed of the magnetic tape 3.

In addition, the signal processing circuit 18 is connected to a cassette tape mounting position of the digital VCR 1, and a mounting detecting unit 20 for detecting the completion of the mounting and loading of the tape cassette 2 is connected to mount the tape cassette 2, It is configured to recognize the completion of loading.

2 is a block diagram of a signal processing circuit according to an embodiment of the present invention.

The signal processing circuit 18 according to the present embodiment includes a digital signal processing unit 21 for performing digital signal processing such as error correction, decompression compression, audio signal processing, and signal shuffle, and a first memory 22 for holding a screen in a video signal. ), A sampling unit 23 for reducing and sampling all the screens held in the first memory 22, and a second screen for holding the small screens held in the first memory 22 and reduced in the sampling unit 23. Memory 24, a sub code processing unit 25 for generating and decoding sub codes, a RAM (Read Only Memory) 26 constituting a working memory, an input / output unit 27 for inputting and outputting signals, and an operation unit 19 ), The digital signal processing unit 21, the first memory 22, the sampling unit 23, the second memory 24, the sub code processing unit 25, the RAM 26, and the input / output unit (27), a control unit 28 for controlling the operation of the modulation and demodulation circuit 16, and a digital signal processing unit 21, a first memory 22, a sampling unit 23, a second Consists of a memory 24, a subcode processing section (25), RAM (26), input-output unit 27, a modulation and demodulation circuit 16, a bus 29 for connecting the control unit 28.

Here, the data structure by the digital VCR standard will be described.

3 shows a data structure for one track of a digital VCR.

The recording track Tr is formed by the magnetic heads 11a and 11b scanning in the arrow A direction. As for the signals of 525 scanning players and a field frequency of 60 Hz, information for one frame is recorded on 10 tracks, for example.

In each track, insert data, track information, audio data, video data, and sub codes are recorded in the order in which the magnetic heads 11a and 11b scan. A gap in which no data is recorded is provided between these four types of data. The track information is data for recognizing the shape of the track width, and the insert data is data used as a reference for retrieving recording portions of audio data, video data and sub-codes.

4 shows a data configuration diagram of a sub code.

The subcodes have a pack structure as shown in FIG. One pack consists of 5 bytes of data of PC0 to PC4.

The first byte PC0 is a pack head for identifying a pack, and the second to fourth bytes PC1 to PC4 become pack data. In the sub code area of one track Tr shown in FIG. 3, 12 packs of sub codes are recorded and grouped into 120 packs of 10 tracks (one frame).

Then, a title timing coder (TTC) describing the time data (hour, minute, second, frame number) of the video signal is recorded in predetermined packs of each group.

5 shows a data configuration diagram of a maker code pack.

In the maker code pack (option pack) shown in FIG. 5, the PCO is a predetermined code ("11110000" in the figure), and PC1 is a maker code. TPDs (the number of packs for an option pack) are displayed as 8 bits of PC2 and the lower 2 bits of PC3. For example, when the number of option packs is 2, PC2 is "10" and the lower 2 bits of PC3 are "0".

The index pack is recorded following the maker code pack of FIG.

6 shows a data configuration diagram of the index pack.

In the index pack shown in Fig. 6, a small screen index pack and a small screen index switch pack are recorded.

As shown in Fig. 6, the index pack records information for identifying the index pack by setting PC0 to a predetermined code. The first bit of PC1 indicates an index bit and the second bit indicates a preindex bit.

In the case of recording small picture information on the magnetic tape 3, first, the index pack having the pre-index bit set to "1" is continuously recorded five frames, and then the index pack having the index bit "1" is recorded five consecutive frames. Subsequently, the sub picture information recorded in the second memory 24 is recorded in the last five frames of which the index bit is "1".

7 shows a data configuration diagram of the small screen index pack.

In the sub-index index pack, information indicating the small screen index pack is recorded in PC0, and recording start point information is recorded in a portion other than "1" of the PC1 to PC4, that is, a portion indicated by an oblique line.

8 shows a data configuration diagram of the small screen index switch pack.

In the small screen index switch pack, information indicating that the small screen index switch pack is written to PC0 is started, and the small screen index pack recording position information is started in a portion other than "1" of the PC1 to PC4, i. .

Here, the operation at the start of recording will be described.

Fig. 9 shows an operation flowchart at the start of recording by the controller which is one embodiment of the present invention.

When recording is started (Step S1-1), the start video is taken out and recorded in the first memory 22 (Step S1). -2).

Next, the size of the small screen on which the signal recorded in the first memory 22 is displayed on one screen by the sampling unit 23 (in this embodiment, the number of small screens is set to "9", and is horizontally and horizontally). The screen is drawn out at 1/3 intervals so as to conform to Fig. 1/3, and the screen is reduced (step S1-3).

Next, the position to be recorded on the second memory 24 is determined according to the number of small screens already recorded in the second memory 24, and is recorded in the second memory 24. Step S1-4)

As the storage position of the small screen, for example, the small screen is stored from the left to the right and the top to the bottom in the input order of the small screen.

10 is an operation explanatory diagram of a small screen recording method according to an embodiment of the present invention. In FIG. 10, S0 displays one screen and S1 and S2 display a small screen.

If small screens S1 and S2 have already been recorded, the next small screen S3 to be recorded is recorded on the upper right.

At this time, the second memory 24 stores at which position the small screen is recorded and the positional information on the magnetic tape 3 of the video corresponding to the small screen. At this time, the position information is recorded as the small screen index switch pack of the sub code shown in FIG.

Next, the operation at the end of recording will be described.

11 is a flowchart of an operation at the end of recording by the control unit according to an embodiment of the present invention.

When the operation unit 19 is operated to instruct recording termination from the operation unit 19 to the control unit 28 (step S2-1), the control unit 28 sets the pre-index bit of the index pack to "1" and continues five frames in succession. Record in minutes (step S2-2).

Subsequently, the index bit is set to "1" and recording is performed continuously for five frames. Thereafter, the screen data is read from the second memory 24, and the small screen is recorded on the magnetic tape 3. (Step S2-3)

At this time, the absolute position information on the magnetic tape 3 accompanying the small screen is also recorded in the small screen as the small screen index pack.

The control unit 28 also stores the absolute position information of the position where this recording has been performed (step S2-4), and turns on an effective plug indicating that the information is valid (step S2-5).

By the above, the search screen formed from the small screen is stored in the recording end position.

Next, the operation of discharging the magnetic tape cassette 2 from the digital VCR 1 will be described.

12 is a flowchart illustrating an operation of discharging the magnetic tape cassette of the control unit according to an embodiment of the present invention.

When the operation unit 19 is operated and the tape ejection instruction is supplied from the operation unit 19 to the control unit 28 (step S3-1), the effective plug set in the control unit 28 is recognized (step S3-2, S3-3). If the effective plug is ON in step S3-3, after the effective flag is turned on, after inserting the absolute position information of the small screen recorded together as the small screen index switch pack, the insert is recorded in the sub code area of the position. The tape ejection operation is performed (steps S3-4, S3-6, S3-7).

At this time, if there are other index small screen positions registered in the control unit 28, the closest position information among them is recorded (steps S3-4, S3-5, S3-6).

Next, an operation when the magnetic tape cassette is inserted will be described.

13 is a flowchart illustrating an operation of inserting a magnetic tape cassette of a control unit according to an embodiment of the present invention.

When the magnetic tape cassette 2 is inserted into the cassette insertion portion of the digital VCR 1 and mounted at a predetermined mounting position, the mounting detection unit 20 detects the mounting of the magnetic tape cassette 2 so that the detection signal is controlled by the control unit 28. Supplies). When the mounting detection signal is supplied from the mounting detection unit 20 (step S4-1), the control unit 28 supplies a control signal to the capstan servo circuit 17, and the magnetic tape 3 is wound up or returned. The vehicle is moved to the winding side (step S4-2), and the small screen index switch pack is detected (step S4-3).

When the small screen index switch pack is detected in step S4-3, the positional information is stored and the effective plug is turned on (step S4-4). At this time, the small screen index switch pack detected at the same time is erased (step S4-5).

Next, a case where a detection instruction is given will be described.

14 is a flowchart of an operation of a search instruction of a control unit according to an embodiment of the present invention.

When the operation unit 19 is operated to perform a search instruction (step S5-1), the control unit 28 detects an effective plug and a position information recording flag set therein (steps S5-2 and S5-3).

In step S5-2 and S5-3, when the effective flag is on and the position information recording flag is off, the control unit 28 controls the capstan servo circuit 17 to form the interior of the control unit 28. The magnetic tape 3 is driven to the position indicated by the positional information set in the above, and the small screen information is reproduced and recorded in the second memory 24 (steps S5-4 and S5-5). The small screen information recorded in the second memory 24 is output (step S5-6).

When the small screen position information recording plug is turned on in step S5-3, since the information is already recorded in the second video memory, it is recorded in the second memory 24 without traveling the magnetic tape 3. Output the information (step S5-6)

At this time, if there are some registered as index small screen positions, the tape is moved to the nearest position among them.

Next, the operation during reproduction will be described.

15 is a flowchart of an operation during playback of the control unit according to the embodiment of the present invention.

If the pre-index bits are detected during playback (steps S6-1, S6-2, S6-3), the control unit 28 then detects the small picture recording plug. (Step S6-4)

When the small screen recording flag is turned off in step S6-4, the positional information is subsequently recognized. (Step S6-5) In step S6-5, if the positional information matches, the index bit &quot; 1 &quot; "Information is reproduced and stored in the 2nd memory 24 (step S6-6).

In addition, in step S6-5, when the small screen recording plug is turned on and the positional information does not match, the contents of the second memory 24 are inserted with the sub code and registered as index small screen positions (step). S6-7, S6-8)

According to this embodiment, when a plurality of video programs are recorded in one magnetic tape cassette, when a program is searched for, it is easy to operate because it searches from a list of small screens. In addition, the small screen can be displayed quickly because all the magnetic tapes are searched at a time and the small screen is not played back in order to display the list of the small screens.

As described above, according to claim 1 of the present invention, when recording a video to be recorded on a recording medium, the screen of the video is held in the first memory, and is reduced and held in the second memory as a small screen. When the recording of the image on the recording medium is finished, the small screen recorded in the second memory is recorded on the recording medium, and the small screen recorded on the recording medium at the time of reproduction is displayed. This makes it possible to easily recognize the contents of the video recorded on the recording medium.

According to claim 2, when recording the small screen held in the second memory on the recording medium, by recording the information for recognizing that the small screen is recorded in the small screen information, the small screen information at the time of reproduction By recognizing the information for recognizing that the small screen recorded together with the recording is recorded, the recorded position of the small screen on the recording medium can be easily recognized, and the search by the small screen can be easily performed. There is a characteristic.

According to claim 3, by recording the position in the recording medium of the small screen held on the small screen, it is possible to easily search for the required video from the small screen.

According to claim 4, since the small screen recorded on the recording medium can be searched and the small screen can be reproduced in response to the search instruction, the small screen can be searched for by the small screen, and the video can be easily searched. It is possible to perform such a feature.

According to claim 5, when the search instruction is made by the search instruction means, the small screen is read from the small screen position at the position closest to the position of the recording medium currently being reproduced among the small screen positions held by the small screen position storage means. As a result, the small screen can be reproduced quickly, and therefore, the video can be retrieved quickly. According to claim 6, when the video is reproduced from the recording medium by the reproducing means, the reproducing of the video by the reproducing means is stopped when the retrieval instruction is issued by the retrieving means, and stored in the small picture storage means. Since the screen is played back, the small screen can be played back quickly, so that the video can be searched quickly.

Claims (6)

In the video recording apparatus, Recording means for recording an image on a recording medium; A first memory for holding a screen in the video signal; A second memory for holding a plurality of small screens in which the screen held in the first memory is reduced; And If there is a recording start instruction, the screen of the video is held in the first memory and the screen held in the first memory is reduced and supplied to the second memory. And recording control means for controlling the recording means to end the recording of the recording medium and recording the small screen held by the second memory onto the recording medium. The recording medium according to claim 1, wherein the recording control means records information identifying that the small screen is recorded in the information of the small screen when recording the search screen held in the second memory into the recording medium. An image recording apparatus, characterized in that. 3. The position according to claim 1 or 2, wherein the recording control means, when feeding a screen from the first memory to the second memory, comprises a screen of the first memory. Image recording apparatus, characterized in that for recording. Reproducing means for reproducing a recording medium on which an image and a desired screen of the image are recorded on a small screen; Small screen detection means for detecting the small screen from the playback signal of the playback means; Small screen position storage means for storing a position on the recording medium of the small screen when the small screen is detected by the small screen detection means; Small screen storage means for storing the child screen read by the playback means; Search instruction means for performing a search instruction to search for a desired image in the video; And When there is a search instruction by the search instructing means, the position of the small screen stored in the small screen position storage means is read out on the recording medium, and on the storage medium of the search screen stored in the small screen position storage means. And retrieving means for controlling the reproducing means according to the position of the reproducing means, reading the small screen from the recording medium, and storing the small screen read by the reproducing means in the small screen storage means. Video playback device. The position of the recording medium currently being reproduced by the reproducing means of the small screen positions held in the small screen position storage means when the search instruction is given by the search instructing means. And the small screen storage means reads out the small screen from the small screen position at the position closest to the small screen position. 6. The retrieval means according to claim 4 or 5, wherein the retrieval means reproduces the image by the reproducing means when a retrieval instruction is given by the retrieving means when the image is being reproduced from the recording medium by the reproducing means. And reproducing the small picture stored in the small picture storage means.

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