JP3914660B2 - Video recording / playback device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a video recording / reproducing apparatus that applies a character signal or a control signal superimposed on a video signal to facilitate search of a recording medium or a program.
[0002]
[Prior art]
2. Description of the Related Art In video recording / reproducing apparatuses such as VTRs, apparatuses having a function of displaying the recorded contents of a recording medium (magnetic tape) on a screen and searching for and reproducing a desired program have already been commercialized. At that time, as a configuration with high program search accuracy and considering user convenience, for example, techniques disclosed in Japanese Patent Application Laid-Open Nos. 8-32922 and 11-0398847 are known. The former identifies an attached tape, displays a list of recording dates, channels, and the like of each program recorded on the tape, and the user can automatically cue and reproduce when selecting a program. The latter relates to a technique for collectively managing recorded programs not only for analog video signals but also for digital video signals.
[0003]
[Problems to be solved by the invention]
The above-described prior art has a function of displaying program information recorded on a tape that has been loaded. Therefore, it is not inconvenient if the number of tapes is small, but if the number of recorded tapes increases and the number of programs increases accordingly, it is not easy to quickly find a program recorded in the past.
[0004]
An object of the present invention, when dubbing turn sets to another recording medium is to prevent the dubbing incorrectly program attached with copy protection.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present invention employs a configuration as described in the claims .
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings.
[0011]
FIG. 1 is a block diagram showing the overall configuration of a cassette tape type video recording / reproducing apparatus (VTR) according to an embodiment of the present invention. In FIG. 1, 1 is a video signal input switching control circuit, 2 is a date / time signal generating circuit, 3 is an absolute address signal generating circuit, 5 is a TV tuner, 6, 11 and 12 are video signal switching circuits, and 7 is an information signal. 8 is an information signal multiplexing processing circuit, 9 is a video signal recording / reproduction processing circuit, 10 is a character signal adding circuit, 13 is a character signal generating circuit, 14 is a video signal presence / absence detecting circuit, and 15 is a blue back generating circuit. , 16 is an information signal reproduction processing circuit, 18 is a memory, 19 is a control signal recording processing circuit, 20 is a control signal reproduction processing circuit, 21 is a control signal switching circuit, 22 is a system control circuit, 24 is an operation unit, and 25 is a display. , 26 is a reel rotation speed detection circuit, 27 is a tape insertion detection circuit, 28 is a control head, 29 and 30 are video heads, and 31 is a magnetic head. -Loop, 32 take-up reel, the supply reel 33, erasure prevention mode detection circuit erroneously 34, 35 TV broadcast signal input terminal, 36 is a video signal input terminal, 37 is a video signal output terminal.
[0012]
The operation unit 24 is composed of, for example, a remote control device, and includes a power button for instructing power on / off, a tape navigation button for instructing a navigation function for displaying a recording status of a cassette tape and supporting recording / playback selection, recording List display button for instructing content list display, program selection button for instructing selection of target recording program, recording / playback button for instructing recording, playback button for instructing playback, stop button for instructing to stop recording or playback, determination Buttons (all not shown) are provided. Each of these switch buttons is independently provided as necessary, or provided so as to be shared with other switch buttons.
[0013]
FIG. 2 is a flowchart showing a basic control operation (mainly a control process executed by the system control circuit 22) in the video recording / reproducing apparatus.
[0014]
When the user operates the power button of the operation unit 24 to give an instruction to turn on the power, the system control circuit 22 turns on the magnetic recording / playback apparatus (step S1). First, the presence / absence of a set cassette tape (tape cassette 31) is confirmed (step S2), and then the insertion of the cassette tape 31 is monitored (step S3). The insertion of the cassette tape 31 is detected by the tape insertion detection circuit 27. When the tape insertion detection circuit 27 detects the insertion of the cassette tape 31, the system control circuit 22 performs preliminary reproduction (step S4) to perform device number identification (step S5), tape identification number detection (step S6), and program information detection (step S4). Step S7) is performed.
[0015]
Here, the preliminary reproduction / recording information acquisition processing step S4 will be described. The signal reproduced by the magnetic heads 29 and 30 after starting the preliminary reproduction is reproduced by the video signal recording / reproduction processing circuit 9, and the recording information signal is extracted by the information signal reproduction processing circuit 16 and output to the system control circuit 22. To do. Here, the recording information is an identification number unique to the apparatus that has recorded on the cassette tape 31 being reproduced, an identification number unique to the cassette tape, and absolute address information of the cassette tape (magnetic tape) being reproduced. is there. The system control circuit 22 acquires and holds the recording information signal input from the information signal reproduction processing circuit 16. At this time, the system control circuit 22 controls the video signal switching circuit 11 to output the video signal from the TV tuner 5 to the video signal output terminal 37 via the character signal addition circuit 10. Therefore, the video signal reproduced in the preliminary reproduction process is not output to the video signal output terminal 37. This preliminary reproduction is intended to read and acquire the recording information recorded on the cassette tape 31, so that it is not necessary to display the reproduced video signal and to avoid unnecessary display of the reproduced video signal. ing. The system control circuit 22 automatically stops the running of the cassette tape 31 after executing the preliminary reproduction process for a predetermined time, and ends the preliminary reproduction.
[0016]
The system control circuit 22 confirms the presence / absence of the recording information acquired and held in the preliminary reproduction (step S7). When recording information is held, the absolute address is set in the absolute address signal generation circuit 3 and the recording information stored in the memory 18 is searched (step S9), and the device-specific identification reproduced from the cassette tape 31 is retrieved. It is confirmed whether there is a match between the number and the identification number unique to the tape cassette and the recording information stored in the memory 18 (step S10). In the video recording / playback apparatus, in the recording using the navigation function, each time the recording is performed, the identification number unique to the cassette tape, the recording program number, the recording date, the day of the week, the recording channel, the recording start / end time, and the recording are recorded. The mode and the like are stored and stored in the memory 18 as recording information, and an identification number unique to the apparatus is held.
[0017]
Regarding the cassette tape 31 inserted in the apparatus, when the identification number unique to the recording apparatus and the identification number unique to the cassette tape do not match those stored in the memory 18 ("N" in step S10), preliminary reproduction When the recording information is not extracted ("N" in step S7) and the video signal presence / absence detection circuit 14 does not detect the reproduction of the video signal ("N" in step S10), the cassette tape 31 is inserted into the cassette. Rewind to the current tape position, resume preliminary playback, and try to acquire recording information again (step 11).
[0018]
Then, the presence or absence of recording information acquisition is confirmed again (step S12), the recording information stored in the memory 18 is searched (step S13), both the recording information are collated (step S14), and when there is no match The cassette tape 31 is rewound to the position when the cassette is inserted (step S16), and the smallest number not yet used is assigned as the identification number (tape number) unique to the cassette tape (step S17).
[0019]
Next, display of the recording state of the cassette tape 31 by the navigation function will be described. In the collation of the recording information acquired by the preliminary reproduction and the recording information stored in the memory 18, when the device-specific identification number, the tape identification number, and the program recording information match ("Y" in steps S10 and S14), The presence or absence of a list display instruction in the navigation function from the operation unit 24 is confirmed (step S18). When the list display is instructed, the recording information is read from the memory 18 and the recording state is displayed as a list (step S19). This list is displayed on the television monitor screen by superimposing characters and picture codes generated by the character signal generation circuit 13 on the video signal from the blue back generation circuit 15, the TV tuner 5 or the video signal input terminal 36. Or by the display unit 25.
[0020]
Next, cue control will be described. When the target recording program is selected by the operation unit 24 and the cueing is instructed (step S20), the system control circuit 22 performs cueing control processing step S21. In this control processing step S21, first, the recording start / end unit data is read from the memory 18 and the target absolute address is set. Then, the target absolute address read from the memory 18 and the cassette tape 31 are moved toward the recording start / end unit. The tape movement time is calculated based on the difference from the current absolute address of the cassette tape 31, and the calculated movement time is compared with the movement time calculated by counting the CTL signal during the cassette tape movement. The current absolute address of the tape 31 is read, the absolute address and the target absolute address are compared, and if they match, the movement of the cassette tape 31 is stopped and the cueing ends.
[0021]
In addition to the above basic control functions, the present invention has the following new functions. The functions described below can be realized mainly by using the system control 22, the memory 18, the operation unit 24, and the display unit 25.
[0022]
FIG. 3 shows a screen display example of the tape data rearrangement function according to the present invention. FIG. 3A shows a list of tapes stored in the device memory 18 on the screen 100. In this case, the contents of the seven registered tapes are displayed in the order of the item 101 of “Tape No”. ing. On the other hand, if the user wishes to display the last recording date, the cursor 102 selects the “last recording date” item 102 in the upper part of the screen, so that the recording date is rearranged as shown in FIG. it can. If the user wishes to display the remaining amount order, selecting the “remaining amount” item 104 in the upper part of the screen enables the rearrangement in order of increasing tape remaining time as shown in FIG. If the number of tapes is large and cannot be displayed on one page, the page can be switched with the function button 106 at the bottom of the screen. With such a rearrangement function, a desired tape can be searched immediately. For example, when recording continuously, tape selection becomes easier by using the “remaining amount” rearrangement.
[0023]
Next, FIG. 4 shows a screen display example of the program title search function according to the present invention. Here, the program title is one in which the user sets a title for the recorded program or sets the program name included in the broadcast signal as it is. The program title search function displays a list of programs applicable to the target title. On the program search screen 110 in FIG. 4A, the “title input” item 111 is selected. Subsequently, the screen is switched to the title input search screen of FIG. This operation is the same as that at the time of title registration, and characters or symbols including Kanji are input. FIG. 4C indicates that the search is being performed. FIG. 4D shows an example of a search result, which shows a list of the program 115 of the target title, the tape No. on which it is recorded, the recording date, and the like. According to this function, for example, it is easy to search and reproduce a continuous drama recorded in a distributed manner.
[0024]
In addition to this, the program search function includes a genre search and a recording date search function. The genre search 112 classifies recorded programs into genres such as “movie”, “music”, and “sports”, and searches by genre. The recording date searches 113 and 114 search the recording date based on “month”, “day”, and “day of the week”. Thus, the search item can be appropriately selected depending on the application.
[0025]
FIG. 5 is a flowchart showing the copy guard function of the video recording / reproducing apparatus according to the present invention. Programs currently being broadcast include programs that are prohibited from being copied (dubbed), and this is a configuration for reliably executing the programs. The copy information superimposed on the broadcast signal is re-acquired (S37), whether there is any change in the copy information (S40), and when it is determined that the copy is prohibited, the recording is terminated. This function can prevent the user from accidentally copying. In particular, if a program recorded as a single program contains an unscheduled copy-prohibited program due to a change in recording start time or end time, it is possible to automatically identify this and prohibit copying. it can.
[0026]
Further, FIG. 6 shows an example in which the copy guard function is displayed on the program list screen 120. In other words, a symbol mark (icon) 121 is displayed, and a warning is issued with a message 122 to prevent the user from duplicating a copy-guarded program by mistake.
[0027]
The above description is directed to a magnetic recording / reproducing device (VTR) as a video recording / reproducing device. However, the present invention is not limited to this, and a recording / reproducing device using a magnetic disk, an optical disk, a semiconductor memory, or the like as a recording medium. Is also applicable.
[0028]
【The invention's effect】
According to the present invention as mentioned above, it is possible to automatically identify the copy prohibition program can be prevented from being dubbed program a user is copy guard accidentally.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram showing an embodiment of a video recording / reproducing apparatus according to the present invention.
FIG. 2 is a flowchart showing basic control operations in the apparatus of FIG. 1;
FIG. 3 is a screen display example of a tape data rearrangement function according to the present invention.
FIG. 4 is a screen display example of a program title search function according to the present invention.
FIG. 5 is a flowchart illustrating a copy guard function according to the present invention.
FIG. 6 shows an example in which a copy guard function is displayed on the screen.
[Explanation of symbols]
5 ... TV tuner 7 ... information signal recording processing circuit 8 ... information signal multiplex processing circuit 9 ... video signal recording / reproduction processing circuit 18 ... memory 22 ... system control 24 ... operation unit 25 ... display unit 31 ... magnetic tape 100 ... tape list Display screen 110 ... Program search screen 120 ... Copy guard display screen

Claims (4)

A video signal input means for inputting a video signal and copy information superimposed on the video signal;
Recording / reproducing means for recording / reproducing the video signal and the copy information on a recording medium;
Video signal output means for outputting a video signal to be displayed on the display means;
Control means for controlling the video signal input means, the recording / reproducing means, and the video signal output means;
With
The copy information superimposed on the video signal input to the video signal input means identifies whether the video signal is copy-inhibited. If copy is prohibited, the recording / playback means records the video signal. Is prohibited, and
When the copy information superimposed on the video signal recorded on the recording medium is reproduced by the recording / reproducing means and the program list screen is displayed, the video signal is prohibited to be dubbed for the copy-guarded program. A mark indicating that is output from the video signal output means and displayed on the display means to prevent dubbing of the video signal;
A video recording / reproducing apparatus characterized by the above. In claim 1,
The copy information superimposed on the video signal input to the video signal input means is re-acquired between the start and end of recording of the video signal input to the video signal input means. Determining whether or not the copy information has changed, and ending recording of the video signal by the recording / reproducing means when copying is prohibited;
A video recording / reproducing apparatus characterized by the above. In claim 1 or 2,
When the copy information superimposed on the video signal recorded on the recording medium is reproduced by the recording / reproducing means and the program list screen is displayed, the video signal is prohibited to be dubbed for the copy-guarded program. A warning indicating that is output from the video signal output means and displayed on the display means;
A video recording / reproducing apparatus characterized by the above. A video recording / reproducing apparatus having a program copy guard function,
Receiving means for receiving a broadcast signal of a copy prohibited or dubbed prohibited program;
Copy information acquisition means for acquiring copy information superimposed on the broadcast signal;
Means for ending recording when it is determined that copying is prohibited by the copy information;
A means for displaying a mark indicating that for a copy-guarded program when displaying the program list screen, issuing a message indicating that, and preventing dubbing;
A video recording / reproducing apparatus comprising:

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