JP2002218362A - Digital broadcast signal recorder/reproducer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a digital broadcast signal recorder/reproducer in which a digital broadcast can be listened at a listener's convenience, while keeping usage permission information, when a digital broadcast added with use permission information is interrupted. SOLUTION: The digital broadcast signal recorder/reproducer comprises a temporary recording/reproducing means 130, and a section 121 for managing the time elapsed, after the start of recording. When the temporary recording/ reproducing means starts temporary recording of digital signal and designate start of reproduction upon elapsing some time, a digital signal recorded in the temporary recoding/reproducing means is reproduced based on the time elapsed, after start of recording being managed at the managing section until a predetermined time elapses after start of recording.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for recording and reproducing a digital signal such as a digital broadcast, and more particularly to an apparatus for recording and reproducing a digital signal in a case where a right holder restricts recording and duplication thereof.

[0002]

2. Description of the Related Art With the recent digitization of broadcasting and AV recording equipment, unlike conventional analog equipment, recording and duplication can be performed without deterioration. On the other hand, a method has been proposed in which license information for restricting recording and copying is added to digitized AV signals and the like, and the creation of recording and copying is restricted in accordance with the license information. It restricts and protects the rights of right holders.

[0003] An example of this license information is IEEE1
DTCP (Digital Trans) using 394-1995.
EMI (E) at mission content provision
ncryption Mode Indicator) is known. IE
EE1394 is a standard for a high-speed serial bus, and is used for packetizing and transmitting AV digital data and the like. This packet includes 2-bit information defined as EMI in DTCP as usage license information. EMI is
In the case of 11, duplication is prohibited, in the case of 10, duplication is permitted only once, and 00 is freely duplicatable. Also, EMI 01
Represents a copy that has been permitted only once but has already been copied.

[0004] For example, when a program is prohibited from being copied in a broadcast, if the receiver that receives the program and the digital recording device are connected by IEEE1394 with DTCP, if the EMI is 11 in the receiver, the digital recording device Determines that copying is prohibited and does not record. Accordingly, when the right holder permits only viewing of the broadcast, the recording thereof can be restricted. Further, for example, when the right holder has permitted to record a broadcast once and view it, if the EMI is 10 in the receiver,
The digital device can perform recording, and when reproducing the next time, by changing EMI to 01 and outputting,
Viewing may be allowed but impossible to record again.

[0005] As described above, digitalization of AV signals and the like enables duplication without deterioration, but at the same time, license information can be added, and the rights of right holders are protected.

[0006]

According to the above prior art,
It is possible to protect the rights of the right holder, for example,
If copy prohibition is specified as the license information, in the case of television broadcasting, you can only watch the program during the broadcast time, and if you receive a call or visitor while watching the program, You will not be able to see the middle of the program.

As a method for solving this problem, Japanese Patent Application Laid-Open
As described in Japanese Patent Application Laid-Open No. 149417, it is known that a program which cannot be copied is recorded once and deleted at the time of reproduction. However, if the reproduction is not performed, the recorded program will remain forever, and the rights of the right holders are not sufficiently protected.

In the field of computers, a trial period is set for a program, and the program operates during the trial period set from the time of installation of the program, but stops operating after the trial period, and is used by inputting a password or the like. It is known what can be done.
An example of such a device is disclosed in Japanese Patent Application Laid-Open No. 7-319689. This is sufficient to determine whether operation is possible on a program basis, but in recent years recording that is not limited to program units, such as recording broadcasts continuously on a large-capacity hard disk and playing them back, is performed. In such a case, if the recording start date and time is treated as the trial start time, it may be impossible to play back the previously recorded part, so broadcast programs etc. can be temporarily recorded. It is not enough for a device to do that.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method for viewing a digital broadcast to which the interruption has been made while viewing a digital broadcast to which usage permission information has been added, according to the convenience of the viewer while protecting the usage permission information. It is an object of the present invention to provide a digital broadcast recording / reproducing device which can be used.

[0010]

SUMMARY OF THE INVENTION The present invention relates to an apparatus for recording / reproducing a digital signal of a digital broadcast, comprising: a temporary recording / reproducing means for performing temporary recording and reproduction thereof; When the digital signal is temporarily recorded and reproduced by the temporary recording / reproducing means, based on the elapsed time from the start of recording managed by the management section, The digital signal recorded in the temporary recording / reproducing means is reproduced until a predetermined time elapses, and the digital signal recorded in the temporary recording / reproducing means is reproduced after a predetermined time elapses from the recording start date and time. Is a digital broadcast signal recording / reproducing apparatus that does not reproduce a digital broadcast signal.

The present invention relates to an apparatus for recording / reproducing a digital signal of a digital broadcast, a temporary recording / reproducing means for performing temporary recording and reproduction thereof, and a management unit for managing an elapsed time from the middle of recording to be reproduced. When the digital signal is temporarily recorded and reproduced by the temporary recording and reproducing means, the digital signal is predetermined from the recording start date and time based on the elapsed time from the middle of recording to be reproduced managed by the management unit. The digital signal recorded in the temporary recording / reproducing means is reproduced until a predetermined time elapses, and the digital signal recorded in the temporary recording / reproducing means is reproduced after a predetermined time elapses from the start of the recording. A digital broadcast signal recording / reproducing apparatus characterized by not reproducing.

In the present invention, the management section manages the elapsed time by counting, and is a digital broadcast signal recording / reproducing apparatus.

In the present invention, the predetermined time is determined by a right holder having a right to use a broadcast program or the like, and the digital broadcast signal recording / reproducing apparatus holds the digital broadcast signal. It is.

In the present invention, the predetermined time is determined by a right holder having a right to use a broadcast program or the like, and is set as one of program information multiplexed and transmitted simultaneously with video and audio by digital broadcasting. A digital broadcast signal recording / reproducing apparatus which is transmitted and uses the transmitted predetermined time.

[0015]

FIG. 1 is a diagram showing a configuration of an embodiment of a digital broadcast recording / reproducing apparatus according to the present invention. In FIG. 1, 110 is a receiving unit, 120 is a control unit for controlling the receiving unit 110, and 130 is a temporary recording and reproducing unit for temporarily recording and reproducing the digital signal received by the receiving unit 110. Receiving means 110 includes a tuner 111 that receives an input signal from an antenna or the like and tunes in, assuming a digital broadcast receiver as an example, and a tuner 111.
Demodulating means 112 for demodulating the signal selected in step 1, error correcting means 113 for correcting the demodulated signal for errors, descrambler 114 for descrambling for conditional access after error correction, and video / audio after descrambling.・
It has a demultiplexing means 115 for separating a desired signal from a signal in which other data is multiplexed, and a video / audio decoder 116 for decoding the separated video / audio signal.

The control means 120 includes a receiving means 110
Required signals are input from the respective constituent elements 111 to 116 and are used to control them. Further, a recording management means 121 for managing information on video / audio / data to be temporarily recorded / reproduced; Clock 122 with
And a counter 123 that accumulates time to measure elapsed time.

Next, the temporary recording / reproducing management processing shown in FIG. 1 will be described with reference to a diagram showing an operation flow. 2 and 3 are diagrams showing an example of an operation flow of the temporary recording / reproduction management process. FIG. 2 is a diagram showing a temporary recording time, and FIG. 3 is a diagram showing a case where a temporarily recorded digital signal is reproduced.

The temporary recording shown in FIG. 2 will be described with reference to the configuration shown in FIG.
Is determined in a clock check step 202,
If the clock 122 is operating, the date and time information is recorded in the recording management unit 121 in the date and time recording step 203, and if the clock 122 is not operating, the date and time information is recorded in the recording management unit 121 as not being set. At the same time as this date and time information record,
In order to measure the elapsed time, the counter 123 is started at a counter start step 204, the elapsed time is integrated at a count-up step 205, and is continuously recorded in the record management means 121 at a counter value recording step 206.

Next, when the temporarily recorded digital signal is reproduced, a reproduction start instruction step 301 shown in FIG.
In step 302, it is determined whether or not the clock 122 is operating. If the clock 122 is operating, the current date and time information is acquired in the current date and time acquiring step 303.
When 22 is not operating, there is no date and time information. In a counter value acquisition step 304, a counter value representing the elapsed time that has been accumulated since the start of recording is acquired. Based on the obtained current date and time and the counter value and the recording start date and time recorded in the recording management unit 121 at the time of recording start, the reproduction condition determination of the temporary recording is performed in the reproduction restriction determination step 305,
If the reproduction is permitted, the process proceeds to the reproduction start step 306. If the reproduction is not permitted, the process proceeds to the reproduction impossible step 307, and the reproduction / non-reproduction from the temporary recording / reproduction means 130 is controlled.

Next, some examples of the reproduction condition judgment in the reproduction restriction judgment step 305 will be described with reference to FIGS.
And will be described below.

FIG. 4 is a diagram showing an example of the reproduction restriction judgment of FIG. 410 shows programs being broadcast in chronological order, and a movie 411 is broadcast as a 120-minute program from 21:00 to 23:00. This movie 4
While viewing 11, for example, a telephone call is received at 21:30, and a recording start 420 is instructed, the viewing is interrupted, and after 421/15 elapses, the recorded digital signal is reproduced, and the viewing 432 is performed from the point at which the interruption occurred. Try to. At this time, the current date and time 2 acquired in the current date and time acquisition step 303
Based on 1:45, the counter value of 15 minutes obtained in the counter value obtaining step 304, and the recording start date and time 21:30, the determination of the reproduction restriction is performed as follows. Date and time at the time of the reproduction request—recording start date and time ≦ temporary recording permission time (expression 1) Counter value ≦ temporary recording permission time (expression 2) When both expressions are true, reproduction is permitted, and at least one expression is false. If not, do not allow playback.

For example, assuming that the temporary recording permission time is 60 minutes, when the recorded data is to be reproduced and viewing / listening 432 is to be performed from the point where the recording was interrupted, both the expressions 1 and 2 become true, and the reproduction restriction judgment is made. In step 305, it is determined that reproduction is possible, and the flow advances to reproduction start step 306 to allow viewing. Here, the temporary recording permission time may be a predetermined time, or may be transmitted by broadcasting as one of program information transmitted simultaneously with video / audio data.

Next, while watching the movie 411, there is, for example, a visitor at 21:30, the recording start 420 is instructed, and the viewing is interrupted. At 22:45 after 422/75 has elapsed, the user has interrupted 21:21: When trying to play back and view 442 from 30, the determination is made in the same manner as above, the determination result of both formulas becomes false, and playback from 420 is not performed when interrupted at 21:30. In this case, the reproduction restriction determination step 305
Performs the following determination processing. The date and time at the time of the reproduction request-the temporary recording permission time <the broadcast end time of the program (Equation 3) By this determination, the temporary recording permission time 60 minutes is counted back from the reproduction request time 22:45 by 424, and the broadcast time 21:45 is returned. It is determined that reproduction is possible. As a result, assuming that the maximum elapsed time 423/60 for which temporary recording is permitted has elapsed, it is determined that viewing / listening 452 can be performed from the position recorded at 21:45.
Proceed to 06. Although not shown, if the interruption time is long and Expression 3 is false, the reproduction is determined to be impossible and the process proceeds to the reproduction impossible step 307.

FIG. 5 is a diagram showing another example of the reproduction restriction judgment of FIG. The broadcast program is the same as the example of FIG. 4, and is assigned the same number. In this example, the movie 411 is temporarily recorded from the beginning, and the movie 511 is temporarily recorded. 521/45 from where you stopped watching and started recording
When viewing 531 from where it was interrupted is performed after the lapse, both Expressions 1 and 2 are true, and the movie 511 can be viewed from the beginning. Next, after 522/90 has elapsed, 2
When the recorded digital signal is reproduced at 2:30 and the viewing / listening 541 is performed from the point of interruption, the expressions 1 and 2 are both false, and the determination of the expression 3 is started. The temporary recording permission time 524/60 is traced back from the reproduction request time 22:30, and the broadcast time 2
It is determined that reproduction is possible from 1:30, and assuming that the permitted maximum elapsed time 523/60 has elapsed, 2
After recording at 1:30, it is determined that viewing and listening 551 can be performed, and the process proceeds to the reproduction start step 306 to perform reproduction.

FIG. 6 is a diagram showing still another example of the reproduction restriction judgment of FIG. 610 shows programs being broadcast in chronological order, and a program 611 is broadcast as a 30-minute program from 19:00 to 19:30. This program is temporarily recorded, and the temporarily recorded program is a program 612. The case where the viewing is interrupted and the recorded digital signal is reproduced at 20:00 after 621/60 after the start of recording and the viewing 631 is performed from the interrupted point is the same as the above example. it can.

Next, there is a case where viewing / listening 641 is performed at 20:35 after a lapse of 622 of 95 minutes after the start of recording, but 20 minutes after 19:30 when temporary recording is completed.
The power is turned off to 35, the counter 123 is not operating, and the count value is 30 minutes. Therefore, when a reproduction request is made at 20:35, Expression 2 is true, but Expression 1 is false, and Expression 3 is evaluated. At playback request 2
When the temporary recording permission time 624/60 is traced back from 0:35 to 19:35, and the broadcast end time of the program is 19:30, the program reproduction 651 is not reproduced.

In this example, a case has been described where time information which is multiplexed and transmitted with video / audio data and the like can be obtained at 20:35 when the power is turned on, and the clock 122 is set correctly. When the power is turned on, the time information is set in the clock 122, and the date and time are correctly managed, there may be a process of comparing the recording start date and time with the current date and time and correcting the count value of the counter 123. Needless to say.

If the time information cannot be obtained when the power is turned on at 20:35 and the clock 122 is not set, the expressions 1 and 3 cannot be evaluated. In this case, as a determination method and processing, when the time information is acquired and the reproduction is disabled until the clock 122 operates properly and the counting process of the counter 123 is stopped, the time information is acquired and the clock 122 is acquired.
Unable to play until counter operates correctly and counter 1
There are three cases in which the counting process of 23 is performed and the elapsed time is continuously measured, and the case where the reproduction restriction determination is made only by the evaluation of Expression 2 based on the count value of the counter 123.

Any of these processes may be selected, a predetermined process may be performed in the same manner as the temporary recording permission time, or any one of program information transmitted simultaneously with video / audio data may be selected by broadcasting. It may be transmitted as information indicating whether to select a process. Here, when reproduction is not possible when time information cannot be acquired and the clock 122 is not operating properly, the counter 123 is not necessary, and the evaluation of Expression 2 need not be performed in each processing flow example.

However, as in this example, it is difficult to distinguish whether the power is cut off or the time information cannot be obtained due to intentional viewing for unauthorized viewing or accident due to thunderstorm or heavy snowfall. is there. Therefore, the clock 12
Determining that reproduction is not possible when the device 2 is not operating properly is considered undesirable because, for example, it may be impossible to reproduce the information at the time when the time information can be obtained after the recovery of the weather is sent.

Therefore, if one or both of the recording start date and time and the reproduction request date and time are undecided, it is determined whether or not reproduction is possible according to Expression 2. Since the counter 123 continues to count up during the operation of the receiver even after the recording is started after the start of the recording, the elapsed time of the temporary recording inside the receiver is accumulated, so that even if an unauthorized viewing is attempted, the counter 123 is temporarily stopped. In order to ensure that the recording permitted time is consumed, there is always a point in time at which reproduction cannot be performed, and the rights of the right holder can be protected.

Also, in this example, the case where time information is multiplexed and transmitted together with video and audio, etc., has been described. However, as seen in current VTRs and televisions, a method for allowing a user to set time is also used. After the temporary recording, even if the current time can be set to a past time for the purpose of unauthorized viewing and Expression 1 can be made true, the elapsed time of the temporary recording can be determined by Expression 2, so that unauthorized viewing can be prevented.

As described above, according to this embodiment, it is possible to permit and reproduce the temporarily recorded broadcast program in the temporary recording / reproducing means only during the period permitted as the temporary recording permitted time. While watching the right of the right holder, the right of which copying is not allowed, the viewing can be performed according to the viewer's convenience without being restricted by the broadcast time in real time.

FIG. 7 is a diagram showing another example of the operation flow of the reproduction management processing of the temporarily recorded data. Note that the temporary recording is the same as in FIG.

The example of the flow of the reproduction management process in FIG. 7 is different from the example of the flow of the reproduction process in FIG.
A reproduction start date and time instruction step 701 for designating a reproduction start date and time, instead of setting the recording start time as an implicit start position.
At the start of recording, the designated reproduction start date and time, the counter value indicating the elapsed time that has been accumulated in the counter value acquisition step 304, the current date and time information acquired in the date and time acquisition step 303, and recorded in the recording management means 121 at the start of recording. A reproduction restriction determination step 705 for performing a reproduction restriction determination based on the recording start date and time is used, and the other points are the same as those in the processing flow example of FIG. 3 and are assigned the same numbers.

The processing of the different points will be described below with reference to an example of the reproduction restriction determination shown in FIG.

In FIG. 8, the broadcast program is the same as the example of FIGS. 4 and 5, and the movie 411 is temporarily recorded from the beginning (movie 511). Viewers watch until 21:30 past 83
1, 841, and the viewing was interrupted for some reason. At 22:15, the recorded digital signal is played back to view again, and the continuation is watched again from 21:30. 832 and re-viewing 842 for re-watching from the first 21:00.

In step 832, reproduction from 21:30 is instructed by relying on the memory that the viewer has been watching until after 21:30. The date / time information 22:15 acquired in the current date / time acquisition step 303 and the counter value acquisition step 3
Based on the counter value of 75 minutes obtained in 04, the determination of the reproduction restriction is performed as follows. When both the date and time at the time of the reproduction request—the reproduction start instruction date and time ≦ the temporary recording permission time (Equation 1 ′) are true, the reproduction is performed when both the counter value and the counter value at the reproduction start instruction time ≦ the temporary recording permission time (Equation 2 ′) are true. Allow and if at least one is false, do not allow playback.

For example, assuming that the temporary recording permission time is 60 minutes, in the case of the subsequent 832, both the determinations are true, the reproduction restriction determination step 705 determines that the reproduction is permitted, and proceeds to the reproduction start step 306 to be able to view. . Here, the counter value at the time of the reproduction start instruction is the recording start date and time 21: 0.
From 0 and the reproduction start instruction date and time 21:30, it is derived by the following equation.

Counter value at playback start instruction time = playback instruction time / date−recording start date / time (Equation 4) In this example, 30 minutes is derived as 21: 30-21: 00. The temporary recording permission time shown here may be a predetermined time, as in the example of FIG. 3, or may be transmitted by broadcasting as one of the program information transmitted simultaneously with video / audio data. .

Next, re-viewing 842 is a case in which the viewer tries to watch again from the beginning again, at 21:00.
When a playback instruction is issued from, the determination processing is performed in the same manner as in the subsequent step 832, and the expressions 1 ′ and 2 ′ are both false, and the playback of the re-viewing 842 from 21:00 which is the beginning of the movie is not performed. In this case, the reproduction restriction determination step 705 performs the following determination processing. Date and time at the time of the reproduction request—temporary recording permission time <program broadcast end time (Equation 3) With this determination, the temporary recording permission time 824/60 is traced back from the reproduction request time 22:15, and the broadcast time 21:15 Is determined to be reproducible. As a result, assuming that the maximum permitted elapsed time 824/60 has elapsed, it is determined that viewing / listening 852 can be performed from the place recorded at 21:15, and the maximum permitted elapsed time 60 minutes is determined. It is determined that re-viewing 852 can be performed from 22:15 when 823 has elapsed, and reproduction start step 3
Proceeding to 06 is the same as the processing flow example of FIG.

Similarly, although not shown, if the interruption time is long and Expression 3 is false, the reproduction is determined to be impossible and the process proceeds to the reproduction impossible step 307. Further, in this example, when the reproduction request date and time are undecided, it is determined whether or not the reproduction is possible by Expression 2 ′. After the recording starts, the counter 123 keeps counting up during the operation of the receiver, so that the elapsed time of the temporary recording in the receiver is accumulated, so that the temporary recording permission time is ensured even if an unauthorized viewing is attempted. As there is always a point where reproduction becomes impossible, the rights of the right holder can be protected. Further, similarly to the processing flow example of FIG.
Even if the time of the clock 122 can be set to the past time by any means at the time of the reproduction request, the elapsed time of the temporary recording can be determined based on the counter value, so that unauthorized viewing can be prevented.

As described above, according to this embodiment as well, it is possible to permit and reproduce reproduction of a broadcast program or the like temporarily recorded in the temporary recording / reproduction means only during the period permitted as the temporary recording permission time. While observing the right of the right holder, which is not allowed to be duplicated, the viewing is not restricted to the broadcast time in real time, and viewing can be performed according to the convenience of the viewer. Furthermore, in the present embodiment, the date and time at which playback is desired can be specified, so that it is not restricted by the recording start time, and while the state where recording is continued for a long time is maintained, the playback restriction judgment of the place where re-viewing is desired due to interruption or the like is performed. It becomes possible.

FIGS. 9 and 10 are diagrams showing another example of the operation flow of the temporary recording / reproduction management process. FIG. 9 is a diagram showing the time of temporary recording, and FIG. 10 is a diagram showing the case of reproducing the temporarily recorded digital signal. FIG.

In the operation flow of the temporary recording management process shown in FIG. 9, the operation flow of this process is different from the operation flow of the process shown in FIG. The other points are the same in that the counter value is recorded in the recording management means 121. The counter 123 always counts up and records a counter value while the receiver is operating so as to operate as reception control.

Next, in the operation flow of the process for reproducing temporarily recorded data shown in FIG. 10, the operation flow of this process is different from the other process flows in that the current date and time, the current counter value, and the recording The other points are the same as those of the other processing flow examples in that a reproduction restriction determination step 1005 for performing the reproduction restriction determination using the start date and time and the counter value at the start of recording is the same as that of the other processing flows, and the same numbers are assigned. Hereinafter, different points will be described.

In the operation flow of this processing, the counter 123
Always counts up, records the counter value C1 at the start of recording, and counts the counter value C2 at the time of the reproduction request.
Therefore, C2-C1 is used as the counter value of Expression 2 or Expression 2 'in another example. Thereby, in the case of the operation flow of other processing, the program temporarily recorded is, for example, 2
When there are two programs, two counters must be managed. However, in the operation flow example of this processing, even if a plurality of programs are temporarily recorded, only one counter needs to be managed.

FIG. 11 is a diagram showing still another example of the operation flow of the reproduction management processing of the temporarily recorded digital signal. Note that the temporary recording is the same as in FIG.

An example of the reproduction management processing flow of FIG. 11 is shown in FIG.
7 is replaced with the reproduction start date / time instruction step 701 in FIG. 7, and in the reproduction restriction determination step 1105, the specified reproduction start date / time is added to the conditions in addition to the conditions in the same manner as in the processing flow example of FIG. The other points are the same as those in the processing flow example of FIG.
They have the same numbers.

As described above, according to the present embodiment, the temporary recording and reproduction means permits and reproduces the temporarily recorded broadcast program only during the period permitted as the temporary recording permission time as the use permission information. Therefore, while watching the right holder's non-copying right, the viewing can be performed at the viewer's convenience without being restricted by the actual time of the broadcast time. Furthermore, according to the present embodiment, the temporary recording management of a plurality of programs can be performed using the counter value only by always performing the count-up management of one counter.

Therefore, even for a broadcast program for which the license is explicitly prohibited from being copied by the right holder, the right holder can temporarily record and reproduce the broadcast program only for a predetermined time or a short time designated each time. Even if the viewing is interrupted by telephone or the like, the viewer can watch again from the place where the viewing was interrupted, so that the viewer will not miss a good scene, It is possible to enjoy a broadcast program without being restricted by real time.

[0052]

According to the present invention, when a user interrupts a digital broadcast to which use permission information has been added while viewing the digital broadcast, the user can view the digital broadcast after the interruption while protecting the use permission information while maintaining the convenience of the viewer. It is possible to provide a digital broadcast recording / reproducing device which can be used in accordance with the present invention.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of an embodiment of a digital broadcast recording / playback apparatus of the present invention.

FIG. 2 is a diagram illustrating an example of an operation flow of a temporary record management process.

FIG. 3 is a diagram illustrating an example of an operation flow of a reproduction management process when reproducing the digital signal temporarily recorded in FIG. 2;

FIG. 4 is a diagram illustrating an example of a reproduction restriction determination in FIG. 3;

FIG. 5 is a diagram showing another example of the reproduction restriction determination in FIG. 3;

FIG. 6 is a diagram showing still another example of the reproduction restriction determination in FIG. 3;

FIG. 7 is a diagram showing another example of the operation flow of the reproduction management process of the temporarily recorded digital signal.

FIG. 8 is a diagram illustrating an example of a reproduction restriction determination in FIG. 7;

FIG. 9 is a diagram illustrating another example of the operation flow of the temporary record management process.

10 is a diagram illustrating an example of an operation flow of a reproduction management process when reproducing the digital signal temporarily recorded in FIG. 9;

FIG. 11 is a diagram showing still another example of the operation flow of the reproduction management processing of the temporarily recorded digital signal.

[Explanation of symbols]

110 receiving means, 111 tuner, 112 demodulating means, 113 error correcting means, 114 descrambler, 115 demultiplexing means, 116 video / audio decoding means, 120 control means, 121 recording management means, 122
.., Clock, 123, counter, 130, temporary recording / reproducing means, 201, recording start step, 202, clock check step, 203, current date and time recording step, 204, counter start step, 205, count up step, 206, counter value recording Step, 301: playback start instruction step, 302: clock check step, 303 ...
Current date and time acquisition step, 304: counter value acquisition step, 305, reproduction restriction determination step, 306, reproduction start step, 307, reproduction impossible step, 701, reproduction start position instruction step, 705, reproduction restriction determination step,
904: start counter value recording step; 1005: reproduction restriction determination step; 1105: reproduction restriction determination step.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04N 5/92 (72) Inventor Sadao Tsuruga 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Digital Hitachi, Ltd. Media Development Division (72) Inventor Masaru Nagi 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Digital Media Development Division Hitachi, Ltd. (72) Inventor Toshiyuki Nemoto 292 Yoshida-cho, Totsuka-ku, Yokohama, Kanagawa Hitachi, Ltd. Digital Media Development Division F-term (reference) 5C052 AA01 AB03 AB04 AC10 CC20 DD04 DD06 DD07 5C053 FA21 FA23 FA27 FA30 GB40 HA40 JA21 LA07 LA20 5D044 AB05 AB07 BC01 CC04 DE17 DE50 GK11

Claims (5)

[Claims] An apparatus for recording / reproducing a digital signal of a digital broadcast, comprising: a temporary recording / reproducing means for performing temporary recording and reproduction thereof; and a management unit for managing an elapsed time from the start of recording. When temporarily recording and reproducing the digital signal by the temporary recording / reproducing means, based on the elapsed time from the start of recording managed by the management unit, until a predetermined time elapses from the start of recording. Reproduces the digital signal recorded in the temporary recording / reproducing means, and does not reproduce the digital signal recorded in the temporary recording / reproducing means after a predetermined time has elapsed from the recording start date and time. Digital broadcast signal recording and playback device. 2. An apparatus for recording / reproducing a digital signal of a digital broadcast, comprising: a temporary recording / reproducing means for performing temporary recording and reproduction thereof; and a management unit for managing an elapsed time from the middle of recording to be reproduced. When the digital signal is temporarily recorded and reproduced by the temporary recording / reproducing means, a predetermined time from the recording start date and time based on the elapsed time from the middle of recording to be reproduced managed by the management unit. The digital signal recorded in the temporary recording / reproducing means is reproduced until the time elapses, and the digital signal recorded in the temporary recording / reproducing means is not reproduced after a predetermined time has elapsed from the start of the recording. A digital broadcast signal recording / reproducing apparatus characterized by the above-mentioned. 3. The digital broadcast signal recording / reproducing apparatus according to claim 1, wherein the management section manages the elapsed time by counting. 4. The digital broadcast signal recording / reproducing apparatus according to claim 1, wherein said predetermined time is determined by a right holder having a right to use a broadcast program or the like, and is held by a digital broadcast signal recording / reproducing apparatus. 2. The digital broadcast signal recording / reproducing apparatus according to claim 1. 5. The predetermined time is determined by a right holder having a right to license a broadcast program or the like, and is transmitted as one of program information multiplexed and transmitted simultaneously with video and audio by digital broadcasting. The digital broadcast signal recording / reproducing apparatus according to any one of claims 1 to 4, wherein the transmitted predetermined time is used.