JP2004328414A - Recording system and recording equipment for digital broadcasting, reproducing system and reproducing equipment for digital broadcasting, transmission equipment for digital broadcasting, program, and recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a recording system and a reproducing system for digital broadcasting, capable of obtaining information intended by a contents supply side and useful information by a viewer when viewing and listening to old contents contained, or the like, included in a recorded digital broadcast signal. <P>SOLUTION: On the transmitting-equipment side, term of validity is given to respective broadcasted contents for transmitting. On the receiving-equipment side, contents are replaced with contents included in broadcast, when the term of validity of the contents expires in reproduction or new contents recorded, in advance, for outputting. Additionally, as an another configuration, a parameter for deciding priority is provided to the broadcasted contents for transmitting at the transmitting-equipment side; and contents, having higher priority, are replaced with the contents broadcasted at that time or contents having high priority are replaced with the contents broadcasted at that time for outputting, after the contents recorded in advance are retrieved. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a digital broadcast recording system and its recording device, a digital broadcast reproducing system and its reproducing device, a digital broadcast transmitting device, a program, and a recording medium, and more particularly to a technique for replacing a CM in a digital broadcast program.
[0002]
[Prior art]
With the spread of digital broadcasting such as BS digital broadcasting, broadband CS broadcasting, and terrestrial digital broadcasting, recording devices for recording programs are also being digitized using DVDs and HDDs.
These digital recording devices configure and record a partial TS in which only information relating to a channel to be recorded is separated from a broadcast wave TS in which a plurality of channels are multiplexed and transmitted.
At the time of reproduction, the recorded partial TS is read out, and video and audio are output while decoding is performed by the receiver similarly to the broadcast wave.
[0003]
In the “broadcast receiving terminal device” of Patent Document 1, the viewer secures a partial area of a storage device built in the broadcast receiving terminal device owned by the viewer as a dedicated area for each service provider, and secures this area. Notify the service provider when this is done.
The notified service provider distributes TV commercial (CM) data and content data based on the strategy and freely stores the data in the area.
Also, the viewer records the broadcasted TV program, and the CM included in the program is stored in an area reserved as a dedicated area for the service provider at the time of recording and playback (time shift viewing). Instead of using commercials or contents, they are now viewed.
As a result, the service provider can reliably provide the service to the viewer, and the viewer can surely receive the service.
[0004]
[Patent Document 1]
JP-A-2002-232813
[0005]
[Problems to be solved by the invention]
In general, commercials and the like are designed on the assumption that broadcasts are viewed in real time, and the content of the same sponsor is updated frequently due to announcements of new products, changes in seasons, and events held at that time. Things.
However, in a general recording / reproducing apparatus, in addition to a desired program, a commercial (CM) or data broadcast inserted between the programs is recorded as it is, and is reproduced as it is.
[0006]
Therefore, since the recorded CM has the content according to the recorded time, there is no problem if the CM is immediately reproduced and viewed, but if the CM is reproduced after a certain period, the CM information becomes old It becomes impossible to convey the contents intended by the broadcasting side.
[0007]
Also, of the recorded broadcasts, the viewer intentionally recorded only the program, and the CM was merely inserted between the programs.
Therefore, from the viewer's point of view, the CM is not recorded because the user wants to view a specific CM, but is merely an information source for obtaining information on new products, events, and the like. It is considered that the past CM is not required by the viewer.
[0008]
However, it is technically possible to delete the CM during recording or playback, but since the CM was originally inserted at the expense of the sponsor, the merits as a sponsor can be easily removed. Becomes smaller.
[0009]
In order to solve such a problem, in the technique of Patent Document 1 described above, a dedicated storage area is provided to the receiving terminal in advance by the viewer for each sponsor, and the latest CM data intended by the sponsor is always stored in the area. So that both parties can exchange the latest CM.
However, according to this method, the latest information is not replaced for CMs other than the sponsor specified by the viewer, and the CMs are freely distributed by the sponsor. It gets bigger.
Furthermore, unless the program provided by the sponsor specified by the viewer is reproduced, the stored CM is not actually viewed (it is highly possible that the replacement CM is not reproduced), so that excessive data storage increases.
[0010]
The present invention has been made in consideration of the above-described circumstances, and when viewing a recorded digital broadcast signal including an outdated content (CM) or the like, the content is replaced with the newest content at this time. It is an object of the present invention to provide a reproducing system and a reproducing device, a recording system and a recording device, a digital broadcast transmitting device, a program, and a recording medium that allow the viewer to obtain more useful information.
[0011]
Further, the present invention provides a playback system and a playback device that can allow a viewer to view information closer to information intended by the content provider by selecting and replacing content related to outdated content. It is an object of the present invention to provide a recording system and a recording device, a digital broadcast transmitting device, a program, and a recording medium.
[0012]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the present invention is configured as follows.
The transmitting device sets the expiration date for each content being broadcast and transmits the content. The receiving device controls the recorded content according to the expiration date at the time of reproduction. That is, on the receiving device side, if the expiration date of the content has expired at the time of reproduction, the content is replaced with the content contained in the broadcast at that time or new content recorded in advance and output.
[0013]
As another configuration, the transmitting device provides a parameter for determining the priority to the content being broadcast, and transmits the content.
When reproducing the recorded content, the receiving device replaces the higher priority content with the content being broadcast at that time and outputs the replaced content.
Alternatively, a search is performed from pre-recorded contents, and if a corresponding content is found, the content having a higher priority is replaced with the content being broadcast at that time and output.
[0014]
Examples of parameters for determining the priority include a company ID, a series ID, a content broadcast date and time, and a version number.
The company ID is used to maintain the superiority of the sponsor by preferentially replacing new content of the same company as old content.
The series ID is used when the same company broadcasts several contents at the same time and preferentially replaces a product similar to the original content.
The content broadcast date and time and the version number are used to determine whether or not the originally recorded content is out of date.
[0015]
This information is multiplexed on each content on the transmission side and transmitted, or only the identification information is multiplexed on the content, and the actual information is transmitted using another communication means such as the Internet or cable network bidirectional communication. However, since the content is recorded at the time of recording and is read out first at the time of program reproduction, there is a time margin before the content is actually reproduced, so that the content to be replaced is searched and obtained. Things get easier.
In addition to the method of acquiring the date and time information and the expiration date from the outside as unique information, a method of arbitrarily setting the date and time information at the time of recording on the receiving side is also possible.
[0016]
Further, to obtain the latest content, the following is performed.
(1) The program being broadcast is periodically checked using the receiver when not in use, and the latest content is recorded on a recording medium in advance.
(2) A content-dedicated channel is prepared on the transmission side, and whenever the content is replaced on the receiving side, the channel is tuned to the content-dedicated channel to obtain the latest content.
[0017]
Further, at the beginning of the reproduction of the program, the content information included in the program is obtained in advance. As a result, there is enough time before the old content to be actually replaced is reproduced, so that it is possible to efficiently obtain only the latest necessary content by using communication means such as the Internet or monitoring a dedicated channel for the content. it can.
[0018]
With the above-described configuration, when viewing a recorded digital broadcast signal including old content and the like, the content is replaced with the newest content at this time and output. All contents included in the existing digital broadcast signal are fairly updated, and the viewer can obtain more useful information.
[0019]
Further, since the content related to the outdated content is selected and replaced, the viewer can view information closer to the information intended by the content provider.
[0020]
In addition, since only the contents necessary for reproduction are acquired each time, the occupied area for temporarily storing the contents necessary for replacement is small.
[0021]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings.
In the embodiment, a commercial having a remarkable expiration date will be described as an example of the content, but the present invention is not limited to the commercial.
[0022]
(First embodiment)
(A) Block diagram of receiver
FIG. 1 is a block diagram of a receiver according to the first embodiment. In FIG. 1, the receiver demodulates a broadcast signal to extract a desired TS (Transport Stream). The first separating unit 102 separates and acquires desired video / audio data and various information from the extracted TS and sets additional information such as an expiration date, and the first separating unit 102 when a recording request is issued. A recording unit 105 that records only necessary information as a partial TS, and a second unit that separates and acquires desired video / audio data and various information from the partial TS read from the recording unit 105 when a reproduction request is issued. A separating unit 108, a selector 109 for selecting and outputting one of the outputs from the first separating unit 102 and the second separating unit 108, 103 that decodes video / audio data output from the data 109 to the original video / audio, an output unit 104 that outputs the decoded video / audio from the screen and speakers, and the viewer operates by operating a remote controller or the like. It comprises a viewer input unit 106 for giving instructions and a control unit 107 for controlling the operation of each block based on the instructions from the viewer input unit 106.
[0023]
(B) Block diagram of transmitter
FIG. 2 is a block diagram of a transmitter according to the first embodiment. In FIG. 2, the transmitter includes a control unit 201 that controls operation of each block, program data 202 including video / audio of a program, CM data 203 containing CM video / audio, an encoder 204 that encodes data extracted from the program data 202 and the CM data 203 to create one channel data, and a TS that multiplexes one or more channel data to create a TS. And a transmitting unit 206 that modulates the TS and outputs it as a broadcast signal.
[0024]
Here, the encoder 204 acquires and encodes data of a program to be broadcast from the program data 202 in accordance with an instruction from the control unit 201, and the program data 202 preliminarily includes information such as a CM insertion point and an insertion time. The CM is recorded, and the encoder 204 acquires and inserts a CM from the CM data 203 as needed. Further, in addition to the video / audio of each CM, information on the CM such as an expiration date and a company ID of each CM is recorded in the CM data 203, and the encoder 204 records the information on the video / audio of each CM. And information for discriminating that it is a CM. At this time, the information is multiplexed so that information about the video / audio data can be transmitted earlier than the data.
Further, all information of the CM data 203 of each channel is collected in a specific channel and repeatedly transmitted to create a CM-dedicated channel.
By repeatedly transmitting the collected CM data, it becomes easier for the receiver to obtain desired CM data.
Also, instead of multiplexing and transmitting information related to the CM to each CM, only the identification information is multiplexed and transmitted as the CM information, and the actual information is transmitted to and from the Internet or the cable network using the identification information on the receiving side. You may make it acquire using another communication means, such as communication.
[0025]
(C) Recording operation in receiver
FIG. 3 is a flowchart showing a control operation of the control unit 107 in the receiver of FIG. 1 during broadcast recording.
The broadcast recording operation is started by receiving a broadcast recording start instruction from the user or the timer recording system (step 301).
[0026]
The information contained in the channel being recorded is monitored to determine whether the currently recorded video / audio is a CM (step 302). If it is a CM (YES in step 302), the process proceeds to step 303; otherwise, the process proceeds to step 304.
[0027]
When recording a CM, the expiration date of the CM is also recorded (step 303). The expiration date is used as it is multiplexed on the broadcast, but if the expiration date is not multiplexed on the broadcast or if there is no means to acquire the multiplexed information, the validity period is set on the receiving side. It can also be set in advance and set arbitrarily from the date and time information at the time of recording (expiration date = current date and time + expiration period).
[0028]
It is determined whether an instruction to end broadcast recording has been received from the user or the system (step 304), and if so, the broadcast recording operation ends (step 305).
On the other hand, if the instruction to end the broadcast recording has not been received (NO in step 304), the process proceeds to step 302 to repeat the same processing.
[0029]
(D) Playback operation in receiver
FIG. 4 is a flowchart showing a control operation of the control unit 107 in the receiver of FIG. 1 when reproducing a recorded program.
Upon receiving an instruction to start playback of the recorded program from the user or the reservation playback system, the second separating unit 108 processes the partial TS of the recorded program read from the recording unit 105 in FIG. 1 to start the playback operation ( Step 401).
In order to obtain the latest CM, the receiving unit 101 in FIG. 1 receives a CM channel included in a broadcast wave, and the TS is processed by the first separating unit 102 (step 402).
[0030]
It is determined whether the recorded program being reproduced is a CM (step 403). If it is a CM (YES in step 403), the process proceeds to step 404 to determine whether or not the CM is to be reproduced.
On the other hand, if it is not a CM (NO in step 403), the process proceeds to step 406 to reproduce the content as it is.
[0031]
The expiration date information of the CM being reproduced is checked (step 404). If the expiration date has expired (YES in step 404), it is determined that another CM may be output, and the CM of the recorded program is output. To replace and output the latest CM, the video / audio of the CM channel subjected to the reception processing in step 402 is output, the output of the recorded program is stopped (step 405), and the process proceeds to step 407.
[0032]
On the other hand, if it is within the expiration date (NO in step 404), it is determined that another CM should not be output, and the output of the video / audio of the CM channel is stopped in order to output the recorded program as it is. The recorded program is output (step 406).
It is determined whether or not an instruction to end reproduction has been issued from the user or the system, and if there has been an instruction (YES in step 407), the reproduction processing ends (step 408).
On the other hand, if there is no instruction to end the reproduction from the user or the system (NO in step 407), the process proceeds to step 403 to repeat the same processing.
[0033]
By configuring the first embodiment as described above, an expiration date is set for a CM included in a program to be recorded, and when the expiration date has expired during reproduction, the latest CM is set at the time of reproduction. Since the output is replaced, the profitability of the viewer to obtain new information from the CM can be improved.
[0034]
(Second embodiment)
(A) Block diagram of receiver
FIG. 5 is a block diagram of a receiver according to the second embodiment. In FIG. 5, parts having the same functions as those of the receiver in FIG. 1 described above are denoted by the same reference numerals. The transmitter of the second embodiment is the same as the transmitter of the first embodiment.
[0035]
In FIG. 5, a receiver demodulates a broadcast signal to extract a desired TS, and separates and obtains desired video / audio data and various information from the TS extracted from the receiver 101, which is further effective. A first separating unit 102 for setting additional information such as a time limit; a recording unit 105 for recording only necessary information from the first separating unit 102 as a partial TS when a recording request is issued; During reproduction of a program, a CM storage unit 501 for temporarily storing a partial TS including the latest CM used in broadcasting, and a readout from the recording unit 105 and the CM storage unit 501 when a reproduction request is issued. A selector 502 for selecting and outputting one of the partial TSs, and a desired video / audio data, A second separating unit 108 for separating and acquiring various types of information, a selector 109 for selecting and outputting one of the outputs from the first separating unit 102 and the second separating unit 108, and a video / video output from the selector 109. A decoder 103 for decoding audio data to original video / audio, an output unit 104 for outputting the decoded video / audio from a screen and a speaker, and a viewer input unit 106 for giving an operation instruction by a viewer using a remote controller or the like. And a control unit 107 for controlling the operation of each block based on an instruction from the viewer input unit 106.
[0036]
When recording only the necessary information from the first separation unit 102 as a partial TS, the recording unit 105 extracts information on a CM in the extracted partial TS and configures the information as a CM database. Record at the beginning or end.
For example, in FIG. 6, when a program portion (1, 2, 3) and a CM (1, 2, 3) exist in the extracted broadcast content, information on the CM (1, 2, 3) is transmitted. A CM database is compiled and tabulated, and the recording unit 105 records the CM database by adding it to the beginning (or end) of the extracted broadcast content.
[0037]
(B) Recording operation in receiver
FIG. 7 is a flowchart showing a control operation of the control unit 107 in the receiver of FIG. 5 during broadcast recording.
The broadcast recording operation is started by receiving a broadcast recording start instruction from the user or the reservation recording system (step 601).
[0038]
The information contained in the channel being recorded is monitored to determine whether the currently recorded video / audio is a CM (step 602). If it is a CM (YES in step 602), the process proceeds to step 603; otherwise, the process proceeds to step 605.
[0039]
Is the information of the CM being recorded (for example, a parameter for determining the priority) acquired, and is it the first CM acquired as a CM included in the currently recorded program, or is the same kind of CM having exactly the same parameters already acquired? Is determined (step 603).
Examples of parameters for determining the priority include a company ID, a series ID, a CM broadcast date and time, and a version number.
The company ID is used to maintain the superiority of the sponsor by preferentially replacing a new CM of the same company as an old CM.
The series ID is used to replace a product similar to the original CM by priority when several CMs are broadcast simultaneously by the same company.
The CM broadcast date and time and the version number are used to determine whether the originally recorded CM has become old.
[0040]
When the program is acquired for the first time (NO in step 603), the CM information is added to the CM database as the CM inserted for the first time in the program being recorded (step 604), and the process proceeds to step 605.
[0041]
On the other hand, if it has already been acquired (YES in step 603), the process proceeds to step 605 without adding to the CM database since the same type of CM has already been recorded and does not need to be duplicated as information.
[0042]
It is determined whether or not an instruction to end broadcast recording has been issued by the user or the system (step 605). If the instruction has been issued (YES in step 605), the CM database is stored together with the program so that the CM database can be obtained at the time of reproduction. Then, the program is recorded in association with the recorded program (step 606), and the recording process ends (step 607).
On the other hand, when there is no instruction to end the broadcast recording from the user or the system (NO in step 605), the process proceeds to step 602 to repeat the same processing.
[0043]
(C) Playback operation in receiver
FIG. 8 is a flowchart showing a control operation of the control unit 107 in the receiver of FIG. 5 when reproducing a recorded program.
The reproduction operation is started in response to an instruction to start reproduction of the recorded program from the user or the reservation reproduction system (step 701).
The CM database in which the information of the CM included in the program to be reproduced is tabulated is read from the recording unit 105 (step 702).
By reading out the program at the beginning of the program playback as described above, there is enough time before the old CM to be replaced is reproduced. Therefore, when searching for the replacement CM, using communication means such as the Internet, or monitoring the CM channel. In such a case, only the latest CM required can be obtained.
[0044]
In order to obtain the latest CM, the receiving unit 101 in FIG. 5 receives a CM channel included in a broadcast wave (for example, broadcasting of only a CM as shown in FIG. 6), and monitors the TS in the first separating unit 102. (Step 703).
The second separating unit 108 processes the partial TS of the recorded program read from the recording unit 105 in FIG. 5 and outputs desired video / audio, thereby starting reproduction of the recorded program (step 704). .
[0045]
For the CM currently being received from the CM channel received in step 703, the information of the CM is compared with the information of each CM in the CM database acquired in step 702 to determine whether the CM can be replaced (step 705). ). For example, among CMs of the same company with the same company ID, a CM having a new broadcast date and time and a new version number is determined to be replaceable.
If the CM can be replaced (YES in step 705), the video / audio is stored in the CM storage unit 501 in FIG. 5 in order to use the CM being received for a CM included in the program being reproduced later. The data is temporarily stored (for example, see the contents of the CM storage unit in FIG. 6) (step 706), and the process proceeds to step 707.
On the other hand, if the replacement is not possible (NO in step 705), the process proceeds to step 707 without storing the CM.
[0046]
It is determined whether the recorded program being reproduced is a CM (step 707). If the program is a CM (YES in step 707), the CM being reproduced is determined from the information on the CM being reproduced and the information on the CM accumulated in step 706. Then, it is determined whether a CM that can be replaced is already stored (step 708).
If the CM has been stored (YES in step 708), the corresponding TS is read from the CM storage unit 501 in FIG. The output is switched to the output from the storage unit 501, the second separation unit 108 performs processing, outputs video / audio (step 709), and proceeds to step 711. At this time, for example, when a plurality of replaceable CMs are included in the stored CMs, the ones that match by comparing the series IDs and have not been reproduced are preferentially used.
In FIG. 6, replaceable CMs (1 ′ and 3 ′) are read from the CM storage unit 501, and replaced with CMs (1 and 3) of the recorded content stored in the recording unit 105 to obtain the reproduced content.
[0047]
On the other hand, if it is not a CM (NO in step 707) or if it is not stored (NO in step 708), the video / audio of the CM storage unit 501 in FIG. The output is stopped, the recorded program is output (step 710), and the process proceeds to step 711.
[0048]
It is determined whether or not an instruction to end the reproduction has been issued from the user or the system (step 711). If the instruction has been issued (YES in step 711), the reproduction processing is ended (step 712).
On the other hand, if there is no instruction to end the reproduction from the user or the system (NO in step 711), the process proceeds to step 705 to repeat the same process.
[0049]
By configuring the second embodiment as described above, when a CM included in a recorded program is reproduced, the CM is replaced with a newer CM of the same company as the original CM, and is output. And profits can also be increased.
[0050]
(Modified embodiment)
In the second embodiment described above, the entire CM portion is replaced with another CM, but only the video or audio, or only the data broadcast portion may be replaced.
For example, in the receiver of FIG. 5, the selector 502 is removed, the second separating unit 108 is connected to each of the CM storage unit 501 and the recording unit 105, and the selector 109 separates video data, audio data, and data broadcast data from each other. And take it out.
[0051]
As the method of obtaining the latest CM, in addition to the method of obtaining from the CM channel being broadcast, it is obtained from a CM included in a normal program or obtained from an external server using communication means such as the Internet or a LAN. Or you may.
[0052]
Further, the content to be replaced is not limited to the CM, and may be a part of the program itself, such as a product introduction of mail order or a weather forecast.
In addition to the time when the program recorded by the receiver is reproduced, the content included in the currently broadcast program may be replaced.
[0053]
Alternatively, information unique to the receiver may be used as a parameter for determining whether to replace the CM. For example, it is conceivable that a receiver having a paid contract with the broadcasting station can view the program in perfect condition, but a receiver without a paid contract can replace a part of the program with CM.
[0054]
In the present invention, each function constituting the receiver or the transmitter of each of the above-described embodiments is programmed, written in advance in a recording medium such as a ROM, and the respective ROMs are mounted on the receiver or the transmitter. It goes without saying that the objects of the present invention are achieved by executing these programs with a microprocessor.
In this case, the state read and executed from the recording medium implements the function of the above-described embodiment, and the program and the recording medium on which the program is recorded also constitute the present invention.
[0055]
Note that programs for realizing such functions include semiconductor media (for example, ROM, non-volatile memory, etc.), optical media (for example, DVD, MO, MD, CD, etc.), magnetic media (for example, magnetic tape, flexible disk, etc.). , Etc.).
Alternatively, a program stored in a storage device may be directly supplied from a server computer via a communication network such as a network. In this case, the storage device of the server computer is also included in the recording medium of the present invention.
[0056]
It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that various changes and modifications can be made without departing from the gist of the present invention.
[0057]
【The invention's effect】
As described above, according to the present invention, when viewing a recorded digital broadcast signal including old content and the like, the digital broadcast signal is replaced with the newest content at this time and is output. All the contents included in the digital broadcast signal are fairly updated, and the viewer can obtain more useful information.
[0058]
Further, since the content related to the outdated content is selected and replaced, the viewer can view information closer to the information intended by the content provider.
[0059]
In addition, since only the contents necessary for reproduction are acquired each time, the occupied area for temporarily storing the contents necessary for replacement is small.
[Brief description of the drawings]
FIG. 1 is a block diagram of a receiver according to a first embodiment of the present invention.
FIG. 2 is a block diagram of a transmitter according to the first and second embodiments of the present invention.
FIG. 3 is a flowchart showing a control operation at the time of recording a program in a control unit of the receiver in FIG. 1;
FIG. 4 is a flowchart showing a control operation at the time of program reproduction in a control unit of the receiver in FIG. 1;
FIG. 5 is a block diagram of a receiver according to a second embodiment of the present invention.
FIG. 6 is an explanatory diagram of recorded contents of a recording unit and reproduced contents obtained by replacing a CM portion.
7 is a flowchart showing a control operation at the time of recording a program in a control unit of the receiver in FIG. 5;
8 is a flowchart showing a control operation at the time of program reproduction in a control unit of the receiver in FIG. 5;
[Explanation of symbols]
101 receiving unit, 102 first separating unit, 103 decoder, 104 output unit, 105 recording unit, 106 viewer input unit, 107 control unit, 108 second separating unit, 109 selector, 201 .., A control unit, 202, program data, 203, CM data, 204, an encoder, 205, a multiplexing unit, 206, a transmission unit, 501, a CM storage unit, and 502, a selector.

Claims (16)

A digital broadcast reproduction system for outputting a digital video / audio signal A, comprising: means for acquiring information on a content X included in the signal A;
Means for determining whether output of the content X is necessary or unnecessary from the acquired information;
Means for replacing the content X with another alternative content Y for output,
A digital broadcast reproduction system characterized in that content X unnecessary at the time of reproduction is replaced with another alternative content Y and output. A digital broadcast playback system that outputs a digital video / audio signal A,
Means for acquiring information about the content X included in the signal A;
Means for acquiring separately obtained alternative content Y and information on the alternative content Y;
Means for comparing the information about the content X and the information about the alternative content Y to determine whether the alternative content Y can be replaced with the content X and has a higher priority;
Means for replacing the content X with the alternative content Y and outputting the content X;
A digital broadcast reproduction system characterized in that at the time of reproduction, the content is replaced with a substitute content Y having a higher priority which can be substituted for the content X and output. A digital broadcast playback system according to claim 1 or 2,
Means for reading in advance information on each content X contained in the signal A,
A digital broadcast playback system, characterized in that a time for searching or acquiring an alternative content Z is created before each content X is output. A digital broadcast playback system according to claim 1 or 2,
Means for acquiring another digital video / audio signal B during reproduction of said signal A,
A digital broadcast reproduction system, wherein at least a part of the signal B is used as the substitute content Y. The digital broadcast playback system according to claim 4,
Means for searching for and obtaining alternative content Y from the signal B before the actual reproduction of the content X to be replaced;
Means for temporarily recording the acquired alternative content Y,
A digital broadcast reproduction system, wherein an alternative content Y optimal for replacing the content X is obtained. A digital broadcast recording system for recording a digital video / audio signal C,
Means for acquiring information about the content Z included in the signal C;
Means for writing information relating to the content Z at the beginning of the recorded signal C or at a place where it can be read before the content Z at the time of reproduction,
A digital broadcast recording system, wherein information on the content Z can be acquired prior to the content Z during reproduction. A digital broadcast playback device that outputs a digital video / audio signal A,
Means for acquiring information about the content X included in the signal A;
Means for determining whether output of the content X is necessary or unnecessary from the acquired information;
Means for replacing the content X with another alternative content Y for output,
A digital broadcast reproducing apparatus characterized in that content X unnecessary at the time of reproduction is replaced with another alternative content Y and output. A digital broadcast playback device that outputs a digital video / audio signal A,
Means for acquiring information about the content X included in the signal A;
Means for acquiring separately obtained alternative content Y and information on the alternative content Y;
Means for comparing the information about the content X with the information about the alternative content Y to determine whether the alternative content Y can be replaced with the content X and has a high priority;
Means for replacing the content X with the alternative content Y and outputting the content X;
A digital broadcast reproducing apparatus characterized in that at the time of reproduction, the content is replaced with a substitute content Y having a higher priority and which can be substituted for the content X and output. A digital broadcast playback device according to claim 7, wherein:
Means for reading in advance information on each content X contained in the signal A,
A digital broadcast playback device characterized in that a time for searching or acquiring an alternative content Z is created before the output of each content X. A digital broadcast playback device according to claim 7, wherein:
Means for acquiring another digital video / audio signal B during reproduction of said signal A,
A digital broadcast reproducing apparatus, wherein at least a part of the signal B is used as the substitute content Y. The digital broadcast playback device according to claim 10, wherein:
Means for searching for and obtaining alternative content Y from the signal B before the actual reproduction of the content X to be replaced;
Means for temporarily recording the acquired alternative content Y,
A digital broadcast reproducing apparatus for acquiring an optimal alternative content Y to be replaced with the content X. A digital broadcast recording device for recording a digital video / audio signal C,
Means for acquiring information about the content Z included in the signal C;
Means for writing information relating to the content Z at the beginning of the recorded signal C or at a place where it can be read before the content Z at the time of reproduction,
A digital broadcast recording device, wherein information on the content Z can be acquired prior to the content Z during reproduction. A digital broadcast transmission device for transmitting digital video / audio signals,
Means for collecting alternative content for content that has been sent in the past or currently;
Means for repeatedly transmitting the collected alternative content,
A digital broadcast transmitting device characterized by making it easy for a receiving device to obtain desired substitute content. A digital broadcast transmission device for transmitting digital video / audio signals,
Means for transmitting information about the content included in the transmission signal earlier than the content,
A transmitting device characterized by making it easy for a receiving device to search and obtain desired alternative content. A computer, comprising: a function of the digital broadcast reproduction system according to claim 1; a function of the digital broadcast recording system according to claim 6; and a function of the digital broadcast according to claim 7. A program for executing a function of a reproducing device, a function of a digital broadcast recording device according to claim 12, or a function of a digital broadcast transmitting device according to claim 13 or 14. A computer-readable recording medium on which the program according to claim 15 is recorded.

Images