JPH09237484A - Magnetic recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the display of video recording contents on a monitor in a short time by recording the data of video recording contents on a video tape at only the time of taking out a video cassette and reproducing the data of video recorded contents to store them in a memory when the video cassette is inserted again. SOLUTION: The data of video recorded contents of a program are written into the memory 24 for every video recording of the program on the video tape 22. When the instruction to take out the video cassette is given from an operation key 14, the data of video recorded contents are recorded on a sub-code sector of the video tape 22 by a microcomputer 12, and the video cassette is taken out by unloading the video tape 22 while taking it up. When the video cassette is inserted again, the data of video recorded contents are reproduced and stored in the memory 24. When the instruction to display the video recorded contents is given from the operation key 14, the data of video recorded contents are read out from the memory 24, then the information of the video recorded program is displayed on the monitor 32.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording / reproducing apparatus, and more particularly to a magnetic recording / reproducing apparatus which is applied to, for example, an 8 mm VTR or a digital VTR and displays on a monitor information of a program recorded in a video cassette.

[0002]

2. Description of the Related Art An example of a conventional magnetic recording / reproducing apparatus of this kind is disclosed in Japanese Patent Application Laid-Open No. Hei 5/1993.
-266638 (G11B 27/28) and Japanese Patent Application Laid-Open No. 6-68 filed on March 11, 1994.
659 (G11B 27/34, 15/07, 2
3/087, 23/30, 27/17). The former of these is that each time the recording of the program is completed, the video tape is fast-forwarded to the end to record the content information such as the recorded content and the recording start position, and the content information is displayed on the monitor during playback. is there. In the latter, the content information is recorded in the memory mounted on the video cassette and the content information is displayed on the monitor during reproduction.

[0003]

However, in the former case, in order to confirm the recorded contents, it is necessary to once feed the video tape to the end, and there is a problem that it takes time to display the recorded contents. Further, in the latter case, although the recorded contents of the video cassette can be displayed in a short time, there is a problem that it is necessary to mount a memory in the video cassette, which causes a cost increase.

Therefore, a main object of the present invention is to provide a magnetic recording / reproducing apparatus capable of displaying recorded contents on a monitor in a short time while suppressing the cost.

[0005]

According to the present invention, there is provided a memory in which recorded content data is recorded, a first writing means for reproducing recorded content data recorded on a video tape when a video cassette is inserted, and writing it in the memory. Second writing means for writing the recording content data of the program to the memory each time the program ends, recording means for recording the recording content data written in the memory on the video tape when the video cassette is taken out,
The magnetic recording / reproducing apparatus further includes a display unit for displaying the recorded content data written in the memory on a monitor.

[0006]

Each time the program ends, the recorded content data of the program is written in the memory by the second writing means. When the removal of the video cassette is instructed, the recording content data written in the memory is recorded on the video tape by the recording means, and then the video cassette is taken out. When the video cassette is inserted again, the first writing means reproduces the recorded content data recorded on the video tape and writes it in the memory. For example, when a recording content display instruction is given, for example, recording date and time information and channel information included in the recording content data written in the memory are displayed on the monitor by the display means.

When any one of the recorded content data displayed on the monitor is selected by the selecting means, the program corresponding to the selected recorded content data is cued by the cuing means. Specifically, the cueing unit cues the program according to, for example, the recording start position information included in the recording content data. The video tape has an optional area for each track, for example, and the recorded content data is recorded in this optional area.

[0008]

According to the present invention, the recording content data written in the memory is recorded on the video tape when the video cassette is taken out, and when the video cassette is inserted again, the recording content data is written in the memory. Then, the recorded content data is displayed on the monitor by the display means. Therefore, the contents of the program recorded in the video cassette can be displayed on the monitor in a short time. Also,
Since it is not necessary to mount a memory on the video cassette unlike the prior art, the cost can be suppressed.

The above objects, other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to FIG. 1, a digital V of this embodiment is used.
The TR 10 includes a microcomputer 12. Microcomputer 1 when recording
Reference numeral 2 tunes the television tuner 16 to a desired reception channel in response to a key input signal from the operation key 14.
Therefore, the recording / reproducing processing circuit 18 is supplied with the video signal and the audio signal of the reception channel, and the recording / reproducing processing circuit 18 records the video signal and the audio signal on the video tape 22 by the magnetic head 20. Referring to FIG. 2, a track formed on video tape 22 is composed of a subcode sector, a video sector, an audio sector and an ITI sector, and a video signal and an audio signal are recorded in the video sector and the audio sector, respectively. In this example, 10
An image of one frame is formed by the video signals for the tracks.

Each time the recording of a program (program) is completed, the microcomputer 12 stores the recording content data corresponding to the program in the memory 24. Operation key 1 as shown in FIG.
When the cassette take-out key 14a provided in No. 4 is turned on, the microcomputer 12 gives the recording content data stored in the memory 24 to the recording / playback processing circuit 18. Therefore, the recording / playback processing circuit 18 records the recorded content data in the subcode sector 22 of the video tape 22.
When recording is complete, the videotape 22 will be capstan 3
It is unloaded while being wound at double speed, and then a video cassette (not shown) is taken out. When the ejected video cassette is reinserted,
The recording / reproducing processing circuit 18 reproduces the recorded content data recorded in the subcode sector and gives it to the microcomputer 12. Therefore, the microcomputer 12 stores this recording content data in the memory 24.

When the recording content display key 14b of the operation key 14 is turned on, the microcomputer 12 reads the recording content data from the memory 24, and the program number data, the recording date data, the recording channel data and the recording start time data included therein. Is displayed on the display panel 26 as recorded program information. Specifically, the recorded program information is displayed while switching one program at a time. The microcomputer 12 also uses program number data, recording date data, recording start time data,
The recording channel data and the total recording time data are given to the character generating circuit 28. Therefore, the character generation circuit 28 supplies the character signal corresponding to these input data to the mixing circuit 30. Therefore, the character signal is mixed with the video signal output from the recording / playback processing circuit, and the recorded program information shown in FIG. 4, for example, is superimposed on the video. The digital VTR 10
If is not in the reproduction mode, only the recorded program information is displayed on the monitor 32.

In the sub-code sectors included in the first half 5 tracks among the tracks constituting one frame, ID data and sub-code data as shown in FIG. 6 are recorded, and the sub-code sectors included in each of the latter half 5 tracks. The ID data and the subcode data as shown in FIG. 7 are recorded in. That is, the ID data includes track number data from the recording start position of the video tape 22. In addition, 0SYNC BL of subcode data
OCK to 2SYNC BLOCK and 6SYNC B
Optional areas are formed in the LOCK to 8 SYNC BLOCKs, and the packs shown in FIGS. 8A to 8F are recorded in each of them as recorded content data. That is, the manufacturer code pack shown in FIG. 6A is recorded in the 0SYNC BLOCK and the 1SYNC BLOCK is recorded.
The recording start position track number pack shown in FIG. 6 (B) is recorded in FIG. 6 (B), the recording pack shown in FIG. 6 (C) is recorded in 2SYNC BLOCK, and 6SYNC BLOCK is recorded.
The recording start time pack shown in FIG. 6D is recorded in
The recording source pack shown in FIG. 6 (E) is recorded in the 7SYNC BLOCK, and the recording total time pack shown in FIG. 6 (F) is recorded in the 8SYNC BLOCK.

Each pack has five pack data P.
A header is written in each pack data PC0 including C0 to PC4. The manufacturer ID is written in the pack data PC1 of the maker code pack, and the program number is written in the pack data PC4. The least significant bit “EN” of the program number operates as a flag, and EN = 0 when the program corresponding to this maker code pack is the last program. Recording start position Track number Pack data P of pack
The recording start position track number is written in C1 to PC3. The recording date is written in the pack data PC2 to PC4 of the recording date pack. Specifically, the recorded date and day of the week are written. The recording start time is written to the pack data PC2 to PC4 of the recording start time pack in units of seconds. A 3-digit television channel is written in the pack data PC1 and PC2 of the recording source pack. The total recording time is written to the pack data PC2 to PC4 of the total recording time pack in units of seconds.

The microcomputer 12 creates each pack shown in FIG. 8 every time the program recording is completed, and stores it in the memory 24 in a table format. Therefore, the table shown in FIG. 9 is formed in the memory 24. The microcomputer 12 processes the flow chart shown in FIG. 10 and stores the recording content data in the memory 24 each time the program recording is completed. That is, first, when recording is started in step S1, step S
At 3, it is judged whether or not the recording content data is already stored in the memory 24. If "NO" here, the program number is set to 1 in step S5 and the process proceeds to step S11. If "YES", it is included in the maker code pack of the last program stored in the memory 24 in step S7. Rewrite the EN flag to "1". The processing in step S7 is performed because some programs have already been recorded in the video cassette, and an error will occur in other processing unless the EN flag is corrected.

Next, in step S9, the last program number + 1 stored in the memory 24 is set as the current program number N, and the process proceeds to step S11. Step S11
Then, the manufacturer code pack of the program to be recorded this time is written in the memory 24. At this time, the program number = N is written, and the EN flag = 0 is set because the program (program) recorded this time is the final program at the present time. Then, in each of steps S13 to S19, the recording start track number pack, the recording date pack, the recording start time pack, and the recording source pack are written in the memory 24, and the recording end key 14 of the operation key 14 is written in step S21.
It is determined whether c is turned on. If "YES" here, the total recording time is calculated using the clock 34 in step S23, and the total recording time pack is written in the memory 24. Then, in step S25, the recording operation ends, and the process ends.

The microcomputer 12 is also shown in FIGS.
By processing the flow chart shown in FIG. 3, the recording content data is recorded on the video tape 22 when the video cassette is taken out. That is, first, in step S31, the cassette eject key 1
It is determined whether or not 4a is turned on, and if "YES", the recording content data stored in the memory 24 is recorded in the subcode sector of the video tape 22 in step S33. Then, in step S35, the video tape 2 is attached to the supply side reel (not shown) at a capstan triple speed.
Unload while winding 2 and step S3
At 7, the cassette holder is raised, and the process ends.

In step S33, the microcomputer 12 operates as shown in FIG.
The subroutine shown in 2 is processed. That is, the count value "N" of the address counter 12b corresponding to the address of the memory 24 is reset in step S301, and the data stored in the address "N" is read in step S303. In step S305, it is determined whether the read data is the pack data PC0 of the manufacturer code pack, and if "NO", the process returns, but "YE"
If “S”, the data is stored in the RAM in step S307.
12a, and in each of steps S309 and 311 the count value X of the data read number counter 12c is set to X = 1 and the address counter is incremented.

Then, in step S313, the data stored in the address N is read out, in step S315 it is stored in the RAM 12a, and in each of steps S317 and S319, the data read number counter 12 is read.
c and the address counter 12d are incremented. In step S321, whether reading of data for one program is completed, that is, the count value X =
If it is "NO", the process returns to step S313. If "YES", the process returns to step S3.
At 23, it is determined whether this program is the final program, that is, whether EN flag = 0.
If it is the final program, E in step S325
N flag = 0 is set, but if it is not the final program, EN flag = 1 is set in step S327. Note that FIG.
The EN flag is rewritten in steps S7 and S11, but steps S323-S are performed to ensure complete processing.
327 is provided.

Subsequently, in step S329, the count value Y of the recording track number counter 12d is reset, and in each of steps S331 to S341, the manufacturer code pack, the recording start position track number pack, and the recording date pack stored in the RAM 12a. ， Recording start time pack ，
Set the recording source pack and recording total time pack to 0SYNC BLOCK to 2SYNC of the subcode sector.
BLOCK and 6SYNC BLOCK to 8SYNC
Record in each BLOCK. Then, in step S343, the recording track number counter 12d is incremented, and it is determined in step S345 whether the recording for one frame is completed, that is, whether the count value Y = 10. If “NO” here, step S33.
The process returns to 1 and the process is repeated, but if "YES", it is determined in step S347 whether the recording of the final program is completed, that is, whether the EN flag of the last recorded recording content data is "1". Then, if “NO”, the process returns to step S303 to repeat the same processing, but if “YES”, the process returns.

The microcomputer 12 processes the flowchart shown in FIG. 13 when the video cassette is inserted. That is, first, when it is determined that the video cassette is inserted in step S41,
Tape loading is started in step S43. Next, when it is determined in step S45 that the tape loading is completed, the video tape 22 is reproduced in the forward direction at 1 × speed in step S47, and it is determined whether or not the pack data PC0 of the manufacturer code pack is detected in step S49. In step S51, it is determined whether or not the pack data PC1 of the manufacturer code pack is 10010111B. This code is the manufacturer code of Sanyo Electric Co., Ltd. If either one of steps S49 and S51 is "NO", the process proceeds to step S67. If both are "YES", the manufacturer code pack is read out and stored in the RAM 12a in step S53.

Thereafter, in step S55, it is determined whether or not the pack data PC0 of the recording start track number pack is detected. If "NO", the process proceeds to step S67.
If "YES", the recording start track number pack is read out and stored in the RAM 12a in step S57. In step S59, it is determined whether or not the pack data PC0 of the recording date pack is detected. If "NO", the process proceeds to step S67, but if "YES", step S61.
The recording date pack is read out and stored in the RAM 12a.
In step S63, it is determined whether or not the pack data PC0 of the recording start time pack is detected. If "NO", the process proceeds to step S67, but if "YES", the recording start time pack is read out in step S65 and RAM1 is read.
2a.

In step S69, it is judged whether or not the pack data PC0 of the recording source pack is detected, and "N"
If "O", the process proceeds to step S77, but if "YES", the recording source pack is read and stored in the RAM 12a in step S71. In step S73, it is determined whether or not PC0 of the recording total time pack is detected,
If “NO”, the process proceeds to step S77, but “YES”
If so, the recording total time pack is read out and stored in the RAM 12a in step S75, and the process proceeds to step S79. In steps S67, S77 and S79, it is determined whether or not the reproduction time of the video tape 22 has passed 10 seconds. If "NO", the process returns to step S49, but "YE".
If S ″, the process proceeds to step S81.

At step S81, the RAM 12a is EN
It is determined whether or not the maker code pack with the flag = 0 exists, and if “NO”, it is determined that the writing to the RAM 12a has failed, and the RAM 12a is cleared in step S33, and the process ends. On the other hand, if "YES", it is determined in step S85 whether or not a plurality of maker code packs with EN flag = 0 exist in the RAM 12a. If there is only one pack, step S89
Then, the data stored in the RAM 12a is determined to be the recording content data used for the current display and cueing, and step S9 is performed.
Go to 7. On the other hand, when a plurality of manufacturer code packs with EN flag = 0 exist in the RAM 12a, step S8
In step 7, the program number of the manufacturer code pack is detected, and in step S91 it is determined whether or not there are multiple manufacturer code packs having the maximum program number.

If there is only one, step S9
In step 3, a series of data whose program number changes up to the maximum value is determined as the recording content data used for the current display and the beginning of the display, and the process proceeds to step S97. On the other hand, if there is a plurality of data with the maximum program number, step S
In step 95, the data whose program number changes in ascending order is determined as the recording content data used for the current display and cueing, and step S97 follows. In step S97, the memory 24
Is cleared, the recording content data is written in the memory 24 as it is in step S99, and the process is ended.

The microcomputer 12 processes the flow chart shown in FIG. 14 when displaying a part of the recorded content data stored in the memory 24 as recorded program information and when searching for a desired program. That is, when the recording content display key 14b is pressed in step S101, the recorded program information is displayed on the monitor 32 in step S103 as shown in FIGS.
And displayed on the display panel 26. Next, step S1
When the cue program selection key 14e is pressed with 05,
In step S107, recorded program information corresponding to the program is displayed in a blinking manner. Here, the cue program selection key 14d is composed of two cursor keys 14e and 14f, and by operating these, the blinking recorded program information is switched.

Then, in step S9, the program cue key 1
When 4g is pressed, the recording start track number corresponding to the program is read from the RAM 12a in step S111, and the track number of the current tape position is detected in step S113. Then, step S115
In step S119, it is determined whether or not the cueing position is before the current tape position. If it is before, the video tape 22 is rewound in step S119, but if it is after, the video tape 22 is fast forwarded in step S117. In step S121, it is determined whether 1500 tracks before the cue position is detected. If "YES", the tape feed speed is reduced to 1x in step S123, and the track number of the cue position is detected in step S125. Make a decision.
If detected, the tape feeding operation is ended in step S127, and the processing is ended.

When a new video cassette is inserted into the digital VTR 10, the microcomputer 12 processes the flow chart shown in FIG. 13. At this time, since nothing is detected from the video tape 22, nothing is written in the RAM 12a. Absent. When the program is recorded on the video tape 22, the microcomputer 12 processes the flow chart shown in FIG.
In 4, the recorded content data corresponding to the program is stored. When there are a plurality of programs to be recorded, the same processing is repeated for each program. Then, when an instruction to take out the video cassette is given, the microcomputer 12 records the recording content data stored in the memory 24 on the video tape 22, and unloads the video tape 22 while winding it, and takes out the video cassette. . That is, the recorded content data is recorded on the video tape 22 only when the video cassette is taken out.

When this video cassette is reinserted,
The microcomputer 12 reproduces the video tape 22 for 10 seconds, stores the reproduced recorded content data in the RAM 12a once, and then writes it in the memory 24. When the display instruction of the recorded contents is given, the microcomputer 12 reads the recorded contents data from the memory 24 and displays the recorded program information on the monitor 22 and the display panel 26. In addition, when the display instruction of the recorded contents is given while playing the video signal,
The recorded program information is superimposed on the playback video.
When the cueing instruction is given while the recorded program information is displayed on the monitor 20, the microcomputer 12 cues the program based on the recording start track number of the instructed program and the track number of the current tape position. .

According to this embodiment, the recording content data stored in the memory 24 is recorded on the video tape 22 only when the cassette is taken out, and when the cassette is inserted, the recording content data is read and written again in the memory 24. The recording content can be displayed on the monitor 32 immediately when the instruction to display the recording content is given. Further, since the recording start position track number is included in the recording content data, it is possible to easily find the beginning of the recorded program.

Although this embodiment has been described using a digital VTR, the present invention can of course be applied to an 8 mm VTR.

[Brief description of drawings]

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

FIG. 2 is an illustrative view showing a video tape.

FIG. 3 is an illustrative view showing an operation key.

FIG. 4 is an illustrative view showing a display example of a monitor.

FIG. 5 is an illustrative view showing a display example of a display panel.

FIG. 6 is an illustrative view showing a structure of ID data / subcode data.

FIG. 7 is an illustrative view showing a configuration of ID data / subcode data.

8A is an illustrative view showing a manufacturer code pack, FIG. 8B is an illustrative view showing a recording start position track number pack, and FIG. 8C is an illustrative view showing a recording date pack; D) is an illustrative view showing a recording start time pack,
(E) is an illustrative view showing a recording source pack, and (F)
FIG. 6 is an illustrative view showing a recording total time pack.

FIG. 9 is an illustrative view showing a table stored in a memory.

FIG. 10 is a flowchart showing a part of the operation of the embodiment in FIG. 1;

FIG. 11 is a flowchart showing a part of the operation of the embodiment in FIG. 1;

FIG. 12 is a flowchart showing a part of the operation of the embodiment in FIG. 1;

FIG. 13 is a flowchart showing a part of the operation of the embodiment in FIG. 1;

FIG. 14 is a flowchart showing a part of the operation of the embodiment in FIG. 1;

[Explanation of symbols]

 10 ... Digital VTR 12 ... Microcomputer 14 ... Operation key 22 ... Video tape 28 ... Character generation circuit 32 ... Monitor 26 ... Display panel

Claims (5)

[Claims] 1. A memory for recording recording content data, a first writing means for reproducing the recording content data recorded on a video tape when a video cassette is inserted and writing the same in the memory, each time a program ends. Second writing means for writing the recorded content data of the program in the memory, recording means for recording the recorded content data written in the memory on the video tape when the video cassette is taken out, and written in the memory A magnetic recording / reproducing apparatus comprising display means for displaying the recorded content data on a monitor. 2. The magnetic recording / reproducing apparatus according to claim 1, wherein the recording content data includes at least recording date / time data and recording channel data of the program. 3. A selection means for selecting any one of the recorded content data displayed on the monitor, and a cue means for cueing a program corresponding to the selected recorded content data. The magnetic recording / reproducing apparatus described. 4. The magnetic recording / reproducing apparatus according to claim 3, wherein the recording content data includes recording start position data, and the cueing unit cues the program according to the recording start position information. 5. The video tape has an optional area for each track, and the recorded content data is recorded in the optional area.
2. The magnetic recording / reproducing apparatus according to any one of 1.