JP2008271104A - Video recorder and video recording method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a video recorder and a video recording method capable of raising convenience in users by generating the backup of a video-recorded broadcast program without destroying the limit of copy once. <P>SOLUTION: The video recorder includes: a tuner 101 for selecting broadcast wave; a decoder 102 for decoding the selected data; a recording part 103 for recording the decoded data; an output part 104 for outputting the recorded data; a CPU 105 for generating data for detecting rebroadcast; and a memory 106 for storing data for detecting the rebroadcast. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a recording apparatus and a recording method for receiving a television broadcast and recording a broadcast program.

  As a video content copy prevention method, for example, a macrovision method is generally used in analog media such as VHS video.

  Since digital media can be copied without any deterioration, digital rights management DRM (Digital Rights Management) is essential.

  For example, the digital interface IEEE 1394 adopts DTCP (Digital Transmission Content Protection), and the HDMI (High Definition Multimedia Interface) adopts HDCP (High-bandwidth Digital Content).

  Also, in the DVD-Video software, CSS (Content Scramble System) is widely adopted.

  In digital broadcasting, a conditional access system B-CAS (BS Conditional Access Systems) is adopted as DRM. In this method, a contact-type IC card called a B-CAS card is inserted into a receiver to enable transmission / reception. Although initially limited to BS digital broadcasting, it is now also applied to terrestrial digital broadcasting.

  The B-CAS system currently in operation is adapted to CGMS (Copy Generation Management System). CGMS puts copy management information on a video signal and causes the recorder to operate in accordance with the copy management information.

  B-CAS CGMS is generally called copy-once. Copy-once has particularly severe restrictions among DRMs. That is, “one-generation copy permission”.

  In a recorder, a CPRM (Content Protection for Recordable Media) system is employed to record a copy-once broadcast program.

  Since a program recorded by CPRM is encrypted, it can be viewed only by a device that supports CPRM.

  In addition, when recording on a medium such as a DVD-R, the medium must be compatible with CPRM. For this reason, copy-once programs cannot often be recorded on inexpensive DVD-Rs on the market in large quantities.

  Some recorders have the functions of both a hard disk (HDD) recorder and a DVD recorder. In this case, it is impossible to record the copy once program once on the HDD and save the backup on the DVD later. When recording instructions are given to a DVD in order to make a backup, it becomes a move rather than a copy. In other words, it is impossible to create a backup.

  Since there is inconvenience for users that copy-once cannot be backed up, a method that can create a backup without breaking the copy-once framework is eagerly desired.

  Japanese Patent Application Laid-Open No. 2004-228561 discloses a method of handling a plurality of devices as a single device via a network. According to this method, a user can specify the number of copies of a copy-once program that is required on the GUI (Graphical User Interface), thereby performing simultaneous recording with a plurality of recording devices and recording the required number of program data. It is.

Patent Document 2 below discloses a method of recording content management information on a first medium. According to this method, when creating a backup from a first medium such as an HDD to a second medium such as a DVD, the backup is encrypted and recorded, and when viewing the content of the second medium, it is based on the content management information. The content is transferred to the first medium and reproduced.
JP 2005-244576 A JP 2006-195973 A

  However, the method of Patent Document 1 requires a plurality of recording devices, and does not match the actual situation of users in general households.

  Further, in the method of Patent Document 2, if the first medium on which the content management information is recorded is damaged, the content recorded on the second medium cannot be seen, so it cannot be said to be a substantial backup. Met.

  In the present invention, recording is automatically performed a plurality of times by a single recording device. An object of the present invention is to provide a recording apparatus and a recording method capable of holding a plurality of program data of the same content without a user having a plurality of recording devices.

  According to the present invention, it is possible to hold a plurality of program data of the same content. Since the program data is stored even if the medium storing the content is damaged, the original backup can be left.

In order to solve the above problems, the present invention provides a recording apparatus for receiving a digital broadcast and recording a broadcast program.
Recording means for recording program data of the broadcast program;
Storage means for storing program information of the broadcast program recorded in the recording means;
Output means for outputting program data of the broadcast program recorded in the recording means to recording means connected to the outside;
Detecting means for detecting presence / absence of rebroadcast of the broadcast program recorded in the recording means based on the program information;
And control means for controlling the recording means so as to record program data of the rebroadcast program when the rebroadcast is present.

  According to the present invention, it is possible to create a backup of recorded content while maintaining the copy-once limitation of a broadcast program, and the convenience for the user can be improved.

  Originally, the purpose of taking a backup is to prepare for data corruption. In the case of analog media, the image quality deteriorates with the passage of time and the frequency of playback, so backup at an early stage was necessary. However, in the case of digital media, there is basically no deterioration in image quality as in analog media, so there is no need to make a backup as quickly as in analog media.

  In other words, the present invention is suitable for digital media because it is sufficient to have a backup when performing an operation with a risk of damaging data such as a move.

  In digital media, data may be lost due to deterioration of the media itself. Since a recordable medium such as a DVD-R has a shorter lifetime than a read-only medium such as a DVD-ROM, the present invention is suitable for a recordable medium.

Example 1
FIG. 10 is a diagram showing a system configuration example using the recording apparatus of the present invention.

  A display device 2 and an external recording device 4 such as a DVD recorder are connected to the recording device 1. The recording device 1 is operated by a user using a remote controller 3.

  FIG. 1 is a block diagram showing the basic configuration of a recording apparatus 1 according to the present invention.

  The digital broadcast wave is received by the antenna 107 and input to the tuner 101.

  The tuner 101 selects a channel according to a user instruction. The user's instruction is given by a user interface such as the remote controller 3. User instructions are decoded by the CPU 105 and transmitted to the tuner 101.

  The decoder 102 decodes the broadcast program of the channel selected by the tuner 101 and outputs it as image data and audio data.

  The large capacity recording unit 103 (recording unit) records image data and audio data as program data. In this example, the large capacity recording unit 103 is a hard disk (HDD).

  The output unit 104 outputs program data to the external display device 2 or an external recording device. The output unit 104 converts the program data into a data format suitable for the interface of each external connection device and outputs the data.

  The CPU 105 (control means) receives an instruction from the user from the remote controller 3 and gives an operation instruction to each block. The CPU 105 automatically obtains program information from the large-capacity recording unit 103 according to the contents of the user's instruction, and generates a rebroadcast detection list.

  The memory 106 (storage means) records the rebroadcast detection list generated by the CPU 105. The memory 106 outputs and updates the rebroadcast detection list according to instructions from the CPU 105.

  The recording operation of the present invention will be described with reference to the flowchart of FIG.

  In this example, it is assumed that program recording has already been performed several times, and program data of a plurality of contents is recorded in the large-capacity recording unit 103. Here, in the case where the recorded content is content input by digital broadcasting, generally copy-once copy restrictions are imposed and copying is not possible. In this case, even if the copy operation is performed, the operation becomes impossible or the operation is switched to the move operation.

  The user selects a recorded content from a graphic user interface (GUI) displayed on the display device 2 and performs a move operation (S201).

  The moving destination at this time is the external recording device 4 via the output unit 104.

  The CPU 105 activates a new GUI screen and asks the user whether to make a rebroadcast recording reservation for the content that the user is about to move (S202).

  If the user selects “Do not schedule rebroadcast recording”, the move operation is performed as it is (S203).

  When the user selects “Reserve broadcast recording”, the CPU 105 generates a rebroadcast detection list (S204), and performs a move operation (S205).

  The CPU 105 acquires program information of the content that the user is about to move from the large-capacity recording unit 103. The acquired information is information such as a program title, broadcast date and time, performers, and the like.

  Based on the acquired content information, the CPU 105 searches whether or not there is a rebroadcast of the corresponding content in the currently acquired electronic program guide (EPG) (S206).

  When the corresponding content is detected, the recording reservation of the corresponding content is performed (S207).

  If the corresponding content is not detected, the status is S208 and the EPG acquisition timing is awaited.

  Generally, EPG is acquired and held for only one week. The EPG is periodically updated so that the latest EPG can be acquired.

  When the latest EPG is acquired (S209), the CPU 105 detects whether there is a rebroadcast detection list in the memory 106 (S210).

  If there is no rebroadcast detection list, the status again becomes S208, and the EPG acquisition timing is awaited.

  When there is a rebroadcast detection list, the presence / absence of rebroadcast of the corresponding content is searched for in the latest EPG based on the content information described in the list (S206).

  When the corresponding content is detected, the recording reservation of the corresponding content is performed (S207).

  According to the above description, the content information described in the rebroadcast detection list is always one, and when a new rebroadcast detection list is generated, the old rebroadcast detection list is overwritten.

  When overwriting, it is possible to provide a means for confirming to the user whether or not the old list may be deleted using a GUI or the like.

  Further, instead of the single list as described above, content information may be added to the rebroadcast detection list each time a move operation is performed. In this case, it is preferable that the user can browse the rebroadcast detection list and delete it.

  Next, a corresponding content search method will be described with reference to an EPG display example of FIG.

  FIG. 3 shows an EPG in a matrix form of time axis and channel. The vertical axis represents time and the horizontal axis represents channels. Information such as program titles and performers is displayed in the frame of each matrix.

  As shown in FIG. 3, characters surrounded by a square may appear after the program title. “Re” represents rebroadcasting, “New” represents new program, “S” represents stereo broadcasting, and “Two” represents bilingual broadcasting. Such program information is acquired as digital broadcast metadata. That is, a rebroadcast program can be searched from the rebroadcast information of metadata and the program title. If it is a continuous drama or the like, the number of the first episode or the subtitle information is also described in the metadata, so the content can be selected from these pieces of information.

  Here, in the case of a rebroadcast program, an auxiliary title not included in the original title is often added. As shown in the example of FIG. 3, “Encore Hour” on the four-hour frame of two TVs, “Channel A” on the five-time frame of two TVs, “Drama 5” on the five-time frame of TV sunset, etc. are added. Is a supplementary title.

  Therefore, when a search for matching the full text of the title is performed, the content to which these auxiliary titles are added is excluded.

  Therefore, it is also necessary to set a search condition so that the search can be performed without the above-described auxiliary title.

Similarly, when the relevant content to be searched is a movie or the like, the auxiliary title is likely to change every broadcast time such as “Wednesday Road Show”, “Midnight Road Show”, and “Cinema Hour”. Therefore, when the content genre is a movie, it is effective to exclude the auxiliary title and search. (Fig. 3: Refer to the TV sunset from 7 to 8)
In the case of a movie, even if the same content is broadcast, it is not usually distinguished as “rebroadcast”. In addition, it may be broadcast on different channels.

  Therefore, when the corresponding content to be searched is a movie, “rebroadcast” and “broadcast channel” are excluded from the search conditions, and the search is performed from information such as “title” and “performer”.

  As described above, the search accuracy can be improved by determining the search condition based on the genre information which is one of the program information of the contents. FIG. 11 shows the above content search method in a flow.

In addition, in the case of dramas and variety programs, there is a broadcast in the form of “summary” apart from normal rebroadcast. (Fig. 3: Refer to 7-8 hours frame for dual TV)
In the case of the omnibus, there is no distinction of “rebroadcast”. Although the summary version does not accurately backup the moved program, it can be viewed as a related program, and is therefore preferably a search target. That is, the rebroadcast program according to the present invention includes a program broadcast in a compilation form. In particular, in the case of variety programs, there are many cases in which rebroadcasting is performed only in a compilation.

  Therefore, for a genre with a summary, it is preferable to set a search condition so that the summary can be searched separately. If a summary is detected as a search result, it is registered in “Recommended Recording Program”. When information is newly registered in the “recording recommended program”, the user is notified that there is new information by means such as an LED on the recorder main body or an icon display on the GUI. If there is a recording instruction from the user, a recording reservation is made.

  FIG. 12 shows an example of a search condition for each genre of content search. The horizontal axis of the table in FIG. 12 represents the genre, and the vertical axis represents the search condition. Search conditions that apply to each genre are marked with a circle.

(Example 2)
In the following examples, differences from Example 1 will be described.

  In the second embodiment, when the user makes a recording reservation for the first time, whether or not to search for rebroadcasting is determined by the user's selection.

  FIG. 4 is a flowchart showing the operation flow of the second embodiment.

  The user performs a recording reservation operation using the remote controller 3. The normal recording reservation procedure is completed here (S401).

At that time, it is confirmed whether re-broadcast reservation of the program that has been reserved for video recording is to be performed by the user or the like (S402).
If "Do not make re-broadcast reservation" is selected, the process ends as it is (S404).
When “Reserve rebroadcast” is selected, the program information of the program that is currently reserved is acquired from the metadata and added to the rebroadcast detection list. (S403)
Here, the metadata is acquired from the EPG currently held when the recording reservation is performed.

  After being added to the rebroadcast detection list, the program information is searched every time the EPG is updated, and if there is matching program information, a recording reservation is made.

(Example 3)
The third embodiment is a technique for canceling the copy-once restriction step by step by making a pseudo recording reservation instead of actually performing a recording operation at the time of rebroadcast recording.

  FIG. 5 is a flowchart illustrating the operation flow of the third embodiment.

  The user turns on the re-broadcast detection setting by GUI or hardware switch (S501).

  CPU105 acquires the program information of the content currently recorded on the large capacity recording part 103, and adds it to a rebroadcast detection list (S502).

  The CPU 105 searches the EPG data based on the rebroadcast detection list and detects whether there is a rebroadcast of the corresponding content (S503).

  If there is no rebroadcast of the corresponding content, it will be in a standby state (S505) until the next EPG update timing, and the rebroadcast detection list is stored in the memory 106.

  If there is a rebroadcast of the corresponding content, a pseudo-recording reservation for the rebroadcast of the corresponding content is made (S504).

  Pseudo-recording reservation does not perform actual recording, but operates as if recording is performed by adjusting the tuner 101 (receiver) to the recording reservation channel at the scheduled recording time. Therefore, the remaining recording capacity of the large-capacity recording unit 103 is not changed by the pseudo recording.

  When the latest EPG is acquired (S506), the CPU 105 refers to the memory 106 and detects whether there is a rebroadcast detection list (S507).

  If there is no rebroadcast detection list, the process waits for obtaining the latest EPG in S505.

  If there is a rebroadcast detection list, the EPG data is searched again based on the list, and it is detected whether there is a rebroadcast of the corresponding content (S503).

  In this way, the pseudo-recording reservation of the content is performed by the EPG search several times, and when the reservation time of the pseudo-recording reservation is reached, the message “pseudo-recording” is displayed on the display device 2 and the recording is performed. It will be in the state of being.

  When the rebroadcasting is completed (S508), the copy limit number managed by CGMS is incremented by 1 (the copy limit number is increased by 1) (S509).

  As a result, it is possible to increase the number of copy restrictions without losing the remaining recording capacity of the large capacity recording unit 103.

  Even during the move operation, if the copy limit count is 2 or more, the move can be performed only by the copy limit count operation without deleting the content data, so that the safety of the move can be improved.

Example 4
In the fourth embodiment, when a rebroadcast search is performed using the methods of the second and third embodiments, whether or not there is a rebroadcast in the currently acquired EPG is displayed in the “recorded program list”. This is a technique to inform the user of the recommended status of the move.

  FIG. 6 shows a display example of a recorded program list.

  FIG. 6 shows a situation where four contents have been recorded.

  Of these, icons and letters are displayed to the right of the third “Life of Umeko” from the top, indicating that the rebroadcast date is approaching.

  The recommended move situation may be expressed by the color of the icon.

  For example, EPG generally acquires one week's worth of data, so white one week before rebroadcasting, and blue gradually increases as the rebroadcast date approaches. When broadcast recording is completed, the color changes from blue to green.

  By doing so, the rebroadcast status can be understood at a glance.

  When the method of the fourth embodiment is used as the method of the second embodiment, two identical contents are recorded, so that the icons for “move” and “save” are automatically distributed after recording. (See FIG. 7). At this time, which one is used for the move is determined in advance by the user setting. Also, the user may be able to select after recording.

  FIG. 8 shows a display example when the method of the fourth embodiment is used as the method of the third embodiment.

  When pseudo recording ends, the color of the icon on the right side of the content changes, and the copy limit count is displayed on the right side.

  In this way, even if the recorded content increases due to rebroadcast recording, it is possible to make the display of the recorded program list easier to see.

(Example 5)
The fifth embodiment is a method in which two recording units are provided, and when two identical contents are collected by rebroadcast recording, the move is automatically performed.

  FIG. 9 shows a block diagram of the fifth embodiment.

  FIG. 9 is obtained by adding a second recording unit 108 (second recording means) to FIG. 1 shown in the first embodiment.

  If the first recording unit 103 (first recording unit) is an HDD, the second recording unit 108 may be a removable recording medium such as a removable HDD or a DVD recorder.

  Normally, recording is performed in the first recording unit 103. The user can switch ON / OFF of the automatic move setting by changing the setting. Hereinafter, the state where the automatic move setting is turned on will be described.

  When rebroadcast recording is performed using any one or a combination of the embodiments 2 to 4, two identical contents exist in the first recording unit 103. Here, in order to simplify the explanation, it is assumed that there are two identical contents even when the copy limit number by CGMS is two.

  When the CPU 105 detects that there are two identical contents in the first recording unit 103, it issues an instruction to move any one of the contents to the second recording unit.

  When the move is completed, a message “Move complete” is displayed on the display device 2. Further, the remaining recording capacity of the second recording unit 108 is also displayed. If the remaining recording capacity is low, a message prompting the replacement of the medium is displayed.

  The following method is also possible. The program data of the broadcast program recorded in the first recording device 103 is stored in the memory 106, and the presence or absence of rebroadcasting is searched from the program data read from the memory 106 under the control of the CPU 105. If there is a rebroadcast, the rebroadcast program is automatically recorded in the second recording device 108.

  As a result, a backup is automatically created in the second recording unit 108, and it is possible to protect program data even when the first recording unit 103 is damaged due to the life of the apparatus or an accident. .

The block diagram which shows the structure of the video recording apparatus by this invention Flowchart showing the operation of the first embodiment Display example of EPG Flowchart showing the operation of the second embodiment Flowchart showing the operation of the third embodiment Display example of recorded program list Display example of recorded program list Display example of recorded program list The block diagram which shows the structure of the video recording apparatus by 5th Example System configuration example using a recording apparatus according to the present invention Search condition setting flowchart Search condition setting example for each genre

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Recording device by this invention 2 Display device 3 Remote control 4 External recording device 101 Tuner 102 Decoder 103 Large capacity recording part 104 Output part 105 CPU
106 Memory 107 Antenna 108 Second recording unit

Claims (9)

In a recording device that receives a digital broadcast and records a broadcast program,
Recording means for recording program data of the broadcast program;
Storage means for storing program information of the broadcast program recorded in the recording means;
Detecting means for detecting presence / absence of rebroadcast of the broadcast program recorded in the recording means based on the program information;
And a control means for controlling the recording means so as to record the program data of the rebroadcast program when the rebroadcast is present.   2. The control unit according to claim 1, wherein the control unit controls the output unit to output the program data of the broadcast program recorded in the recording unit to an externally connected recording unit based on a user operation. The recording device described. In a recording device that receives a digital broadcast and records a broadcast program,
First recording means for recording program data of the broadcast program;
Storage means for storing program information of the broadcast program recorded in the first recording means;
Detecting means for detecting presence / absence of rebroadcasting of the broadcast program recorded in the first recording means based on the program information;
Controlling the first recording means to record the program data of the rebroadcasted rebroadcast program in the first recording means when there is the rebroadcast;
A recording apparatus comprising: control means for moving either the program data of the broadcast program or the program data of the rebroadcast program recorded in the first recording means to the second recording means.   4. The recording apparatus according to claim 3, wherein the second recording unit is a removable recording medium. In a recording device that receives a digital broadcast and records a broadcast program,
First recording means for recording program data of the broadcast program;
Storage means for storing program information of the broadcast program recorded in the first recording means;
Detecting means for detecting presence / absence of rebroadcasting of the broadcast program recorded in the first recording means based on the program information;
Control means for controlling the second recording means so as to record the program data of the rebroadcasted re-broadcast program in the second recording means when the re-broadcast exists. apparatus.   The recording apparatus according to claim 1, wherein the broadcast program is a program with copy restrictions imposed. In a recording apparatus having a receiving means for receiving a digital broadcast and a recording means for recording the received broadcast program,
The broadcast program is a copy-restricted program,
Storage means for storing program information of the broadcast program recorded in the recording means;
Detecting means for detecting presence / absence of rebroadcast of the broadcast program recorded in the recording means based on the program information;
And a control means for controlling the receiving means so as to receive the rebroadcast program to be rebroadcast when the rebroadcast is present, and for increasing the copy limit frequency of the program. .   The recording apparatus according to claim 1, wherein the search unit determines a search condition based on genre information of the program information. In a recording method for receiving a digital broadcast and recording a broadcast program,
A recording step of recording program data of the broadcast program;
An instruction step for instructing to output the program data of the broadcast program recorded in the recording step to an externally connected recording means;
A storage step of storing program information of the broadcast program instructed in the instructing step;
Based on the program information, the presence or absence of rebroadcast of the broadcast program recorded in the recording step is detected,
And a control step of recording program data of the rebroadcast program when the rebroadcast is present.

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