JP4286410B2 - Recording / playback device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a recording / reproducing apparatus and a transmitting apparatus, and more specifically, an apparatus for recording and reproducing information of various programs sent by digital broadcasting and a channel for continuously repeating the same program. The present invention relates to an apparatus for transmitting digital broadcasting.
[0002]
[Prior art]
Currently, broadcasting services using CS satellites have already been started as digital broadcasting, and digital broadcasting services using BS satellites are planned in the future.
[0003]
In such digital broadcasting, with the improvement of compression technology and modulation / demodulation technology, in addition to a plurality of program data, a program table attached to a program, detailed program information, etc. can be simultaneously broadcast by one transponder. . For this reason, a method is used in which a popular program is repeatedly transmitted on the same channel and can be viewed with less waiting time. In order to further reduce the waiting time of the viewer, a so-called near video on demand method is also used. In this near video on-demand system, one content is repeatedly broadcast using a plurality of channels in the same transponder with different start times. The viewer can shorten the waiting time until the start of viewing by selecting the program having the closest start time in the program guide.
[0004]
On the other hand, when these digital broadcasts are recorded on a predetermined recording medium (such as a magnetic tape or a magnetic disk), the compressed and multiplexed information of one transponder is used as it is, or the compressed data obtained by extracting only the necessary transport stream is used as it is. Record. This makes it possible to perform time-shifted viewing without degrading the image quality.
[0005]
[Problems to be solved by the invention]
When recording a program in a recording device that receives and records a conventional digital broadcasting system, it is necessary to instruct recording in accordance with the start of broadcasting of the program to be recorded, or to make a timer reservation to start recording from the start of broadcasting. In either case, there is a problem that the recording of a desired program does not end unless a time obtained by adding the waiting time until the broadcast of the program to be recorded and the broadcast time of one program have elapsed. Similarly, when the same program is broadcast repeatedly, or when broadcasting in near video on demand where the broadcast start time is shifted using multiple channels, the wait until the start of the broadcast is the same until the end of recording. The time and the broadcast time for one program had to elapse.
[0006]
Therefore, an object of the present invention is to drastically shorten the total time from the start of recording to the end of recording.
[0007]
[Means for Solving the Problems and Effects of the Invention]
In order to achieve the above object, the present invention has the following features.
A first invention is a recording / reproducing apparatus for recording and reproducing information of various programs sent by digital broadcasting,
Recording means including a predetermined recording medium;
When the digital broadcast includes a predetermined channel that continuously broadcasts the same program, when the recording start of the program that is repeatedly broadcast is instructed, the current time T2 and the program that is repeatedly broadcast Time detection means for detecting the next repetition start time T1 and program time length, and a recording end time T3 obtained by adding the program time length to the current time T2,
Recording control means for recording a digital broadcast transport stream including at least a stream of a predetermined channel in the recording means during a time period from the current time T2 to the recording end time T3 when various times are detected by the time detecting means; Recording position storing means for storing the respective recording positions on the recording means at the current time T2, the repeated start time T1 and the recording end time T3;
When it is instructed to start playback of a program that is repeatedly broadcast, the recording means first records from the recording position of the repeated start time T1 to the recording end time T3 by referring to various recording positions stored in the recording position storage means. Reproduction control means for reproducing the transport stream existing up to the position and subsequently reproducing the transport stream existing from the recording position at the current time T2 to the recording position at the beginning time T1 repeatedly.
[0008]
As described above, according to the first invention, when the digital broadcast includes a predetermined channel for continuously repeating the same program, when recording start of the program to be repeatedly broadcast is instructed, Since the recording is started for the time of the program length from the time when the recording start is instructed without waiting for the next head of the program to appear, the waiting time at the start of recording can be reduced to 0, Total recording time can be greatly shortened. In addition, during playback, playback is performed with the order changed from that during recording. Therefore, playback can be performed in the order in which the program is originally broadcast from the beginning of the program.
[0009]
According to a second invention, in the first invention,
Separating means for separating and extracting at least program-related information from a transport stream of digital broadcasting;
Determining means for determining whether or not the digital broadcast includes a predetermined channel for continuously repeating the same program based on the program related information, and the time detection means includes the predetermined channel for the digital broadcast. When the determination means determines that the information includes a program head, the repeated start time T1 and the program time length are detected based on the program related information.
[0010]
As described above, according to the second invention, it is determined whether or not a channel for repeatedly broadcasting the same program is included in the transport stream of digital broadcasting, and such a channel is included. Since only the predetermined recording process is performed, it is possible to prevent an inconvenient recording process from being performed on other different channels.
[0011]
According to a third invention, in the second invention,
The separating means further separates and extracts the stream of each channel from the transport stream of digital broadcasting,
The recording control means extracts an identifier for identifying a predetermined channel from the program related information, and sets the identifier in the separating means, thereby separating the stream of the predetermined channel and, as a result, the predetermined predetermined A channel stream is recorded in a recording means.
[0012]
As described above, according to the third aspect of the invention, only the stream of the channel to be recorded is separated and recorded on the recording means, so that the recording capacity of the recording means is not wasted.
[0013]
According to a fourth invention, in the third invention,
The separating means further separates and extracts a PCR that is sent from the digital broadcast transport stream at regular time intervals and serves as a reference time for decoding the program,
The time detection means converts the repeated start time T1, current time T2, and recording end time T3 into corresponding PCR values,
The recording control means controls the recording timing of a stream of a predetermined channel by comparing various PCR values converted by the time detection means with real-time PCR separated by the separation means.
[0014]
As described above, according to the fourth aspect of the invention, the recording start timing and the recording end timing are managed based on the PCR value that is the basic clock for encoding / decoding. From the current time T2 to the current time T2 can be more accurately performed, and the disorder of the decoded image in the stream connection can be prevented.
[0015]
According to a fifth invention, in the third invention,
PTS detection means for detecting a PTS value included in the stream of the specific channel separated by the separation means and sent every predetermined number of video frames,
The time detection means converts the repeated start time T1, current time T2, and recording end time T3 into corresponding PTS values,
The recording control means controls a recording timing of a stream of a predetermined channel by comparing various PTS values converted by time detection with a real-time PTS detected by the PTS detection means.
[0016]
As described above, according to the fifth aspect of the invention, the recording start timing and recording end timing are managed using the PTS value that designates the decoding output timing in a certain unit of the stream. Stream connection from the end time T3 to the current time T2 can be performed more accurately, and disorder of the decoded image in the stream connection can be prevented.
[0029]
First 6 The present invention is a recording / reproducing apparatus for recording and reproducing information of various programs sent by digital broadcasting,
Digital broadcasting includes a predetermined channel that broadcasts the same program continuously and repeatedly, and an extended user area of a sequence header included in the stream of the predetermined channel includes a head portion of the program. After that, a count value that is incremented every time the sequence header appears is inserted,
Recording means including a predetermined recording medium;
Separation means for separating and extracting at least program-related information and each channel stream from a transport stream of digital broadcasting;
An identifier setting for extracting an identifier for identifying a stream of a predetermined channel from the program-related information and setting it in the separation means when the start of recording a program to be repeatedly broadcast is instructed, and separating and extracting the stream of the predetermined channel Means,
Header detection means for detecting a count value stored in an extended user area of a sequence header from a stream of a predetermined channel separated by the separation means;
After an instruction to start recording a program that is repeatedly broadcast, it is separated by the separation means from the time when the count value is first detected by the header detection means until the same count value is detected again. Recording control means for recording a stream of a predetermined channel in the recording means;
The timing at which the recording control means starts recording the stream of the predetermined channel is set as the recording start timing C2, the timing at which the header detection means detects the count value 0 is repeatedly set as the head timing C1, and the recording control means sets the stream at the predetermined channel. A recording position storing means for storing the recording position of the stream on the recording means at the recording start timing C2, the repetitive head timing C1 and the recording end timing C3, when the recording end timing is the recording end timing C3;
When it is instructed to start playback of a program that is repeatedly broadcast, the recording unit first refers to the various recording positions stored in the recording position storage unit, so that the recording unit first records from the recording position of the repeated start timing C1 to the recording end timing C3. Playback control means for playing back the stream existing up to the position and subsequently playing back the stream existing from the recording position at the recording start timing C2 to the recording position at the repeated head timing C1.
[0030]
As above, 6 According to the present invention, the digital broadcast includes n channels (n is a natural number of 2 or more) in which the same program is continuously repeated, and the broadcast start times of these n channels are mutually different. When the start of recording of a program that is repeatedly broadcast is instructed when the program is shifted by a certain time, recording starts from the time when the start of recording is instructed without waiting for the next head of the program to appear. Since recording is performed for 1 / n hours, the waiting time at the start of recording can be reduced to 0, and the recording time length can be greatly shortened. In addition, during playback, playback is performed with the order changed from that during recording. Therefore, playback can be performed in the order in which the program is originally broadcast from the beginning of the program. Further, since the recording start / end is controlled using the number assigned in one unit of encoding, the stream is reliably connected from the recording end timing C3 to the recording start timing C2 at the time of reproduction. be able to.
[0031]
First 7 The invention of the 6 In the invention of
Based on the program-related information separated by the separation means, further comprising determination means for determining whether or not a predetermined channel is included in the digital broadcast;
The identifier setting means performs an identifier setting operation to the separating means in response to determining that a predetermined channel is included in the digital broadcast.
[0032]
As above, 7 According to the invention, it is determined whether or not a channel for repeatedly broadcasting the same program is included in the transport stream of digital broadcasting, and only when such a channel is included, a predetermined recording process is performed. Therefore, it is possible to prevent an inconvenient recording process from being performed on other different channels.
[0039]
DETAILED DESCRIPTION OF THE INVENTION
(First embodiment)
FIG. 1 is a block diagram showing a configuration of a recording / reproducing apparatus according to the first embodiment of the present invention. 1, the recording / reproducing apparatus of the present embodiment includes a tuner 1, a separating unit 2, a decoder 3, a CRT 4, a control unit 5, a PTS detecting unit 6, a recording / reproducing control unit 7, and a hard disk 8. And a bus 9. Separation unit 2 includes a separation circuit 10 and switches 11, 12, and 13.
[0040]
The tuner 1 selects a program and outputs a transport stream of one transponder. As a recording / reproducing apparatus, a transport stream may be input from an external tuner. The separation unit 2 separates the stream of the specific program and the program related information from the multiplexed transport stream and switches the streams. The decoder 3 decodes the separated stream and reproduces video and audio. The CRT 4 displays the decoded video. The control unit 5 includes a CPU and controls the entire recording / reproducing apparatus. The PTS detection unit 6 extracts a PTS (Presentation Time Stamp) in the specific stream. Here, PTS is time management information for reproduction output, and is mainly used for measuring relative time. Usually, the PTS is added to a coding sequence layer that sends a predetermined number of videos as a unit. The recording / playback control unit 7 controls the recording and playback of streams on the hard disk 8. The bus 9 connects between the control unit 5 and each block, and transmits control signals and the like. The separation circuit 10 separates a stream of a specific program and related information from the stream. Switches 11, 12, and 13 switch streams.
[0041]
Information simultaneously broadcast includes video / audio encoding information constituting a program, information for extracting a video / audio stream, PCR as a reference clock for decoding video / audio, information for creating a program guide, There are detailed contents information of the program.
[0042]
FIG. 2 shows an example of a broadcast mode of a program on a certain channel. As shown in FIG. Le 3 In 00, the one-hour program of the title “movie XXX” is repeatedly broadcast.
[0043]
Hereinafter, an operation when the recording / reproducing apparatus of the first embodiment described above records a program broadcast in a manner as shown in FIG. 2 will be described.
When the user instructs recording of the channel 300 at the timing T2, the control unit 5 determines the title of the program currently broadcast on the channel 300 and the detailed program information from the program related information already acquired via the separation circuit 10. And extract. Next, the control unit 5 determines that the broadcast time is one hour, and displays the title of the program, the detailed program information, and the broadcast time length of the program to be broadcast from the next 8:00. Compare with those of the program to determine whether they match. In this case, since they match, the control unit 5 determines that the program currently broadcast and the program broadcast from 8:00 are the same.
[0044]
Next, the control unit 5 extracts an identifier for separating the stream of the channel 300 from the program related information, and instructs the separation circuit 10 to separate the stream of the channel 300. The control unit 5 switches the switch 11 to the separation circuit output side and switches the switch 13 to the ON side. Further, the control unit 5 instructs the PTS detection unit 6 to detect PTS.
[0045]
Next, the control unit 5 determines from the program related information that the next program start time is 8:00 and the program time length is 1 hour, and calculates a value obtained by converting 1 hour into a PTS value. To do. The conversion to the PTS value can be easily performed because the unit clock period of the PTS is determined. Next, the control unit 5 continuously acquires the program related information and monitors whether or not the time information (current time) included in the program related information has reached 8:00.
[0046]
The PTS detection unit 6 solves the transport packet of the input video, extracts the PTS included in the header of the video stream, and notifies the control unit 5 of it. The control unit 5 calculates the PTS value obtained by adding the extracted PTS value as the recording start time T2, and further adding the PTS value of one hour which is the program time length to T2, as T3, and records the stream from the time T2. The recording / reproduction control unit 7 is instructed. In response, the recording / playback control unit 7 starts recording the stream of the channel 300 to the hard disk 8, and temporarily stores the recording start position on the hard disk 8 as the recording position at time T2.
[0047]
When the current time is 8:00, the control unit 5 that monitors the time information included in the program related information detects that the time is 8:00, and immediately after that, the PTS detection unit 6 detects the PTS. The value is notified to the recording / reproduction control unit 7 as T1. The recording / playback control unit 7 temporarily stores the stream recording position on the hard disk 8 at the timing T1 as the recording position at the time T1.
[0048]
When the control unit 5 detects that the already calculated value of the time T3 and the PTS value from the PTS detection unit 6 are the same or closest, it notifies the recording / reproduction control unit 7 to the hard disk 8 Stop recording the stream. In response, the recording / reproduction control unit 7 stops recording on the hard disk 8 at the timing of time T3, determines the recording position on the hard disk at time T3, and the recording position at time T1 already stored temporarily. The information is recorded in the directory area of the hard disk 8 together with the recording position at time T2.
[0049]
Next, the operation when the recording / reproducing apparatus of the first embodiment reproduces the broadcast program of the channel 300 recorded in the above-described manner will be described.
When the user gives a reproduction instruction, the control unit 5 instructs the recording / reproduction control unit 7 to reproduce, switches the switch 11 to the recording / reproduction control unit 7 side, and turns on the switch 12. Receiving the reproduction instruction from the control unit 5, the recording / reproduction control unit 7 starts reproduction control of the stream recorded on the hard disk 8. First, the recording / playback control unit 7 reads the recording position information recorded in the directory area of the hard disk 8 and determines the playback order of the recorded streams. Based on this determination, the recording / reproducing control unit 7 first sequentially reads from the hard disk 8 the stream that is recorded starting from the recording position at time T1. Then, the recording / reproduction control unit 7 monitors the reading position of the hard disk 8 and, when reaching the recording position at time T3, continues reading from the recording position at time T2. Finally, the recording / reproducing control unit 7 stops reading when the recording position at time T1 is reached. The read stream is decoded by the decoder 3 and displayed on the CRT 4 from the beginning of the program.
[0050]
In the first embodiment, the PTS value detected by the PTS detection unit 6 is used as time information for recording / reproduction control. However, the transport having a PCR (Program Clock Reference) in the separation circuit 10 is used. Even if a packet is extracted and the detected PCR value is used as time information, it can be recorded from the middle of the program and reproduced from the beginning of the program, as described above. Further, even when time information included in program related information is extracted and used as time information, it can be recorded from the middle of the program and reproduced from the beginning of the program.
[0051]
In the first embodiment, since the reproduction is performed in an order different from the order of the transmitted streams, the PRC and PTS values of the reproduced stream do not become continuous values when shifting from time T3 to time T2. By using the PCR and PTS values at time T1 as a reference during playback, the PCR values and PTS values after time T2 can be easily made continuous by providing an offset corresponding to the program time length.
[0052]
(Second Embodiment)
FIG. 3 is a block diagram showing a configuration of a recording / reproducing apparatus according to the second embodiment of the present invention. 3, the recording / reproducing apparatus of the present embodiment includes a tuner 21, a separating unit 22, a decoder 23, a CRT 24, a control unit 25, a PTS detecting unit 26, a recording / reproducing control unit 27, and a hard disk 28. And a bus 29. The separation unit 22 includes a separation circuit 30 and switches 31, 32, and 33.
[0053]
The tuner 21 selects a program and outputs a transport stream of one transponder. As a recording / reproducing apparatus, a transport stream may be input from an external tuner. The separation unit 22 separates the stream of the specific program and the program related information from the multiplexed transport stream and switches the streams. The decoder 23 decodes the separated stream and reproduces video and audio. The CRT 24 displays the decoded video. The control unit 25 includes a CPU and controls the entire recording / reproducing apparatus. The PTS detection unit 26 extracts the PTS in the specific stream. The recording / playback control unit 27 controls the recording and playback of streams on the hard disk 28. The bus 29 connects between the control unit 25 and each block, and transmits control signals and the like. The separation circuit 30 separates the stream of the specific program and related information from the stream. The switches 31, 32, and 33 switch streams.
[0054]
Information simultaneously broadcast includes video / audio encoding information constituting a program, information for extracting a video / audio stream, PCR as a reference clock for decoding video / audio, information for creating a program guide, There are detailed contents information of the program.
[0055]
FIG. 4 shows an example of a broadcasting mode when the same program is broadcast on a plurality of channels. As shown in FIG. Le 3 In 00, 400, and 500, the one-hour program of the title “movie XXX” is repeatedly broadcast. However, it is assumed that the broadcast start time of the program is different between the channels.
[0056]
Hereinafter, an operation in the case where the recording / reproducing apparatus of the second embodiment described above records a program broadcast in a manner as shown in FIG. 4 will be described.
When the user instructs recording of the channel 300 at the timing T2, the control unit 25 determines from the program related information already acquired via the separation circuit 30 the title of the program currently broadcast on the channel 300, the program details information, To extract. Next, the control unit 25 determines that the broadcast time is 1 hour, and displays the title of the program, the detailed program information, and the broadcast time length of the program to be broadcast from the next 9:00. Compare with those of the program to determine whether they match. In this case, since they match, the control unit 25 determines that the program currently broadcast and the program broadcast from 9:00 are the same.
[0057]
Further, the control unit 25 controls the title of the program currently broadcast on the channel 300, the program detail information, the program length, the program currently broadcast on the channel 400, and the title and program details of the program broadcast from 9:20. The information and the program length are compared, and the title of the program currently broadcast on the channel 500 and the program broadcast from 9:40, the program detailed information, and the program length are compared to determine whether they match. . In this case, since all three channels match, the control unit 25 repeatedly broadcasts the same program in the channels 300, 400, and 500, and the time lag between the channels is equal to 20 minutes. The channel where the beginning of the program appears first after the recording instruction is given Channel It is determined that the number is 300.
[0058]
Next, the control unit 25 extracts an identifier for separating the streams of the channels 300, 400, and 500 from the program related information, and instructs the separation circuit 30 to separate the streams of the channels 300, 400, and 500. The control unit 25 switches the switch 31 to the tuner output side and the switch 33 to the ON side. Further, the control unit 25 notifies the PTS detection unit 26 of the identifier of the channel 300 in which the program head appears earliest, and issues a PTS detection instruction.
[0059]
Next, the control unit 25 determines from the program related information that the next program start time on the channel 300 is 9:00 and the program time length is 1 hour, and divides 1 hour by 3 channels. A value obtained by converting 20 minutes into a PTS value is calculated. The conversion to the PTS value can be easily performed because the unit clock period of the PTS is determined. Next, the control unit 25 continuously acquires the program related information and monitors whether the time information included in the program related information has reached 9:00.
[0060]
The PTS detection unit 26 resolves the input video transport packet, extracts the PTS included in the header of the video stream, and notifies the control unit 25 of the PTS. The control unit 25 sets the extracted PTS value as the recording start time T2, and further adds a value obtained by adding a PTS value obtained by dividing 1 hour, which is the program time length by the number of channels (in this case, 3), to T2. And the recording / reproduction control unit 27 is instructed to record the stream from time T2. In response, the recording / reproduction control unit 27 starts recording the streams of the channels 300, 400, 500 separated by the separation circuit 30 on the hard disk 28, and records the recording start position on the hard disk 28 at time T2. Temporarily store as position.
[0061]
When the time reaches 9:00, the control unit 25 that monitors the time included in the program related information detects that the time has reached 9:00, and immediately after that, the PTS value detected by the PTS detection unit 26 is detected. The recording / reproduction control unit 27 is notified as T1. The recording / playback control unit 27 temporarily stores the stream recording position on the hard disk 28 at the timing T1 as the recording position at the time T1.
[0062]
When the control unit 5 detects that the value of the time T3 already calculated and the PTS value from the PTS detection unit 26 are the same or closest, the control unit 5 notifies the recording / reproduction control unit 27 to the hard disk 28. Stop recording the stream. Further, the control unit 25 determines from the program related information that the channel in which the program head is generated before the program head appearance time of the channel 300 where the program head appears in the recording time and near the program head of the channel 300 is the channel. It is determined that the channel 400 is the next closest channel, the identifiers of the respective channels are arranged in the order of the channels 300, 500, and 400, and the identifier of the channel 300 in which the program head is finally generated during the recording is determined. The arranged reproduction information is created and notified to the recording / reproduction control unit 27. The recording / playback control unit 27 stops recording on the hard disk 28 at the timing of time T3, determines the recording position on the hard disk 28 at time T3, and already records the recording position at time T1 and time T2. Are recorded in the directory area of the hard disk 28.
[0063]
Next, the operation when the recording / reproducing apparatus of the second embodiment reproduces a broadcast program recorded in the above-described manner will be described.
When the user gives a playback instruction, the control unit 25 instructs the recording / playback control unit 27 to play back, switches the switch 31 to the recording / playback control unit 27 side, and turns on the switch 32. Receiving the reproduction instruction from the control unit 25, the recording / reproduction control unit 27 starts reproduction control of the stream recorded on the hard disk 28. First, the recording / reproduction control unit 27 reads the recording position information and reproduction information recorded in the directory area of the hard disk 28, notifies the reproduction information to the control unit 25, and streams from the recording position of the hard disk 28 at time T1. Are read sequentially.
[0064]
When receiving the reproduction information from the recording / reproduction control unit 27, the control unit 25 sets the identifier of the channel 300 arranged first in the separation circuit 30. As a result, only the stream of the channel 300 is extracted from the stream read from the hard disk 28 by the separation circuit 30 and is decoded. Da 2 3 is decoded and displayed on the CRT 24. The recording / playback control unit 27 constantly monitors the reading position of the hard disk 28. When the recording position reaches the recording position at time T3, the recording / reproducing control unit 27 notifies the control unit 25 that the reading of the stream up to time T3 has ended.
[0065]
The recording / reproducing control unit 27 then starts reading from the recording position at time T2. At this time, the control unit 25 sets the identifier of the channel 500 arranged next to the reproduction information in the separation circuit 30. As a result, only the stream of the channel 500 is extracted from the stream read from the hard disk 28 by the separation circuit 30 and is decoded. Da 2 3 is decoded and displayed on the CRT 24. Further, the recording / reproducing control unit 27 monitors the reading position of the hard disk 28 in the same manner as described above, and when the recording position at time T3 is reached, notifies the control unit 25 that the reading of the stream up to time T3 has been completed.
[0066]
The recording / reproducing control unit 27 then starts reading from the recording position at time T2. At this time, the control unit 25 sets the identifier of the channel 400 arranged next to the reproduction information in the separation circuit 30. As a result, only the stream of the channel 400 is extracted from the stream read from the hard disk 28 by the separation circuit 30 and is decoded. Da 2 3 is decoded and displayed on the CRT 24. Further, the recording / reproducing control unit 27 monitors the reading position of the hard disk 28 in the same manner as described above, and when the recording position at time T3 is reached, notifies the control unit 25 that the reading of the stream up to time T3 has been completed.
[0067]
The recording / reproducing control unit 27 then starts reading from the recording position at time T2. At this time, the control unit 25 sets the identifier of the channel 300 arranged next to the reproduction information in the separation circuit 30. As a result, only the stream of the channel 300 is extracted from the stream read from the hard disk 28 by the separation circuit 30 and is decoded. Da 2 3 is decoded and displayed on the CRT 24. Further, the control unit 25 notifies the recording / reproduction control unit 27 that the reproduction information has become the identifier of the last channel. In response, the recording / reproducing control unit 27 stops reading from the hard disk 28 when the recording position at time T1 is reached.
[0068]
As is clear from the above description, the stream read from the hard disk 28 and separated by the separation circuit 30 is a stream that lasts for one hour from the beginning of the program, is decoded by the decoder 23, and is displayed on the CRT 24 from the beginning of the program. Is done.
[0069]
In the second embodiment, the PTS value detected by the PTS detection unit 26 is used as time information for recording / reproduction control. However, instead of the PTS detection unit 26, a clock extraction unit that detects PCR. Even if the clock extraction unit extracts a transport packet having a PCR and uses the detected PCR value as time information, it is recorded for 20 minutes from the middle of the program and reconstructed from the program head to the original one-hour program. Can be played. Similarly, when time information included in program-related information is extracted and used as time information, it can be recorded for 20 minutes from the middle of the program, reconstructed from the program head to the original one-hour program, and reproduced. it can.
[0070]
Further, in the first embodiment, since the reproduction is performed in an order different from the order of the transmitted streams, the PCR and PTS values of the reproduced stream do not become continuous values when the time T3 shifts to the time T2. The PCR value and the PTS value after the time T2 can be easily set to continuous values by providing an offset corresponding to the program time length divided by the number of channels based on the PCR and PTS value at the time T1 at the time of reproduction. it can.
[0071]
(Third embodiment)
FIG. 5 is a block diagram showing a configuration of a transmission device and a recording / reproduction device according to the third embodiment of the present invention. In FIG. 5, the transmitting device 40 transmits program information to the recording / reproducing device 50 via a transmission path 49. The transmission path 49 is generally a spatial transmission path using satellite broadcasting.
[0072]
The transmission device 40 includes a program management unit 41, a program storage unit 42, encoders 431 to 43n, counters 451 to 45n, a multiplexing unit 47, and a transmission unit 48. The program management unit 41 manages a program sent out by the transmission device 40. The program storage unit 42 stores program information to be transmitted. The encoders 431 to 43n are program In response to an instruction from the management unit 41, the program information from the program storage unit 42 is encoded. Each of the counters 451 to 45n sets the count value to 0 in response to the program head information from the program management unit 41, and increments the count value each time the encoders 431 to 43n create a sequence header. The multiplexing unit 47 divides and encodes encoded information from the plurality of encoders 431 to 43n into transport packets. The transmission unit 48 performs modulation and up-conversion for transmitting the output of the multiplexing unit 47.
[0073]
The counters 451 to 45n are values obtained by clearing the count value to 0 in response to a signal from the program management unit 41 when the program information given to the corresponding encoders 431 to 43n is a portion corresponding to the head of the program. Is output. The encoders 431 to 43n respectively set the count values from the counters 451 to 45n in the extended user area of the sequence header when creating the sequence header, encode the header information, and multiplex the encoded information. To the unit 47. The encoders 431 to 43n create a frame header for each frame, a GOP header for each GOP, and a sequence header for each predetermined number of GOPs in accordance with the MPEG2 standard. The sequence header is added to an encoding sequence layer for sending a predetermined number of videos as a unit. Furthermore, the encoders 431 to 43n each generate a sequence header, and then output a signal for incrementing the count values of the counters 451 to 45n, thereby incrementing the count values of the counters 451 to 45n. As a result, the serial number in the program, which is 0 at the beginning of the program and incremented for each sequence header, can be sent in the extended user area of the sequence header.
[0074]
The recording / reproducing apparatus 50 includes a tuner 51, a separation unit 52, a decoder 53, a CRT 54, a control unit 55, header A detection unit 56, a recording / reproduction control unit 57, a hard disk 58, and a bus 59 are provided. Separation unit 52 includes a separation circuit 60 and switches 61, 62, 63.
[0075]
The tuner 51 selects a program and outputs a transport stream of one transponder. As a recording / reproducing apparatus, a transport stream may be input from an external tuner. The separation unit 52 separates the stream of the specific program and the program related information from the multiplexed transport stream and switches the streams. The decoder 53 decodes the separated stream and reproduces video and audio. The CRT 54 displays the decoded video. The control unit 55 includes a CPU and controls the entire recording / reproducing apparatus. The header detection unit 56 extracts a count value, which is a serial number of a sequence unit in the program, from the extended user area of the sequence header in the specific stream. The recording / playback control unit 57 controls the recording and playback of streams on the hard disk 58. A bus 59 connects between the control unit 55 and each block, and transmits a control signal and the like. The separation circuit 60 separates the stream of the specific program and related information from the stream. The switches 61, 62, and 63 switch streams.
[0076]
From the transmitting device 40 to the recording / reproducing device 50, in order to create video / audio encoding information constituting the program, information for extracting the video / audio stream, PCR as a reference clock for decoding the video / audio, and a program table Information, detailed content information of the program, etc. are sent simultaneously.
[0077]
FIG. 6 shows an example of a broadcast mode of a program on a certain channel. As shown in FIG. Le 3 In 00, the one-hour program of the title “movie XXX” is repeatedly broadcast.
[0078]
Hereinafter, an operation in the case where the recording / reproducing apparatus 50 shown in FIG. 5 records a program broadcast in the manner shown in FIG. 6 will be described.
When the user instructs recording of the channel 300 at the timing C2, the control unit 55 obtains the program title currently being broadcast on the channel 300 and the detailed program information from the program related information already acquired via the separation circuit 60. Extract. Next, the control unit 55 determines that the broadcast time is 1 hour, and displays the title of the program, the detailed program information, and the broadcast time length of the program to be broadcast from the next 8:00. Compare with those of the program to determine whether they match. In this case, since they match, the control unit 55 determines that the program currently broadcast and the program broadcast from 8:00 are the same.
[0079]
Next, the control unit 55 extracts an identifier for separating the stream of the channel 300 from the program related information, and instructs the separation circuit 60 to separate the stream of the channel 300. The control unit 55 switches the switch 61 to the separation circuit output side and the switch 63 to the ON side. Further, the control unit 55 instructs the header detection unit 56 to detect the count value set in the extended user area of the sequence header. In response, the header detection unit 66 resolves the input video transport packet, extracts the count value included in the extended user area of the sequence header of the video stream, and notifies the control unit 55 of the count value.
[0080]
The control unit 55 temporarily stores the extracted count value as the recording start timing C2, and instructs the recording / reproduction control unit 57 to record the stream from the timing C2. In response to this, the recording / reproducing control unit 57 starts recording the stream of the channel 300 to the hard disk 58 and temporarily stores the recording start position on the hard disk as the recording position at the timing C2.
[0081]
Thereafter, when the count value 0 is notified from the header detection unit 56, the control unit 55 notifies the recording / reproduction control unit 57 of the count value as timing C1. The recording / playback control unit 57 temporarily stores the stream recording position on the hard disk 58 at the timing C1. Next, the control unit 55 monitors whether or not the count value notified from the header detection unit 56 matches the count value of the timing C2 that is temporarily stored. The recording / reproduction control unit 57 is notified as C3 and recording is stopped. Accordingly, the recording / reproduction control unit 57 stops recording on the hard disk 58 immediately before the timing C3, determines the recording position on the hard disk 58 at the timing C3, and already records the recording position at the timing C1. The information is recorded in the directory area of the hard disk 58 together with the recording position at timing C2.
[0082]
Next, the operation when the recording / reproducing apparatus 50 of FIG. 5 reproduces the broadcast program of the channel 300 recorded in the above-described manner will be described.
When the user gives a reproduction instruction, the control unit 55 instructs the recording / reproduction control unit 57 to reproduce, switches the switch 61 to the recording / reproduction control unit 57 side, and turns on the switch 62. Receiving the reproduction instruction from the control unit 55, the recording / reproduction control unit 57 reads the recording position information recorded in the directory area of the hard disk 58 and determines the reproduction order of the recorded streams. Based on this determination, the recording / playback control unit 57 first sequentially reads the stream from the recording position at the timing C1 of the hard disk 58, monitors the reading position of the hard disk 58, and continues when the recording position at the timing C3 is reached. Then, reading from the recording position at timing C2 is performed, and reading is stopped when the recording position at timing C1 is reached. The read stream is decoded by the decoder 53 and displayed on the CRT 54 in order from the top of the program.
[0083]
In the third embodiment, since the playback is performed in an order different from the order of the streams to be transmitted, the PRC and PTS values of the played back stream do not become continuous values when shifting from timing C3 to timing C2. With the PCR and PTS values at the timing C1 at the time of reproduction as a reference, the PCR values and the PTS values after the timing C2 can be easily made continuous by providing an offset for one hour which is the program time length.
[0084]
(Fourth embodiment)
FIG. 7 is a block diagram showing a configuration of a transmission device and a recording / reproduction device according to the fourth embodiment of the present invention. In FIG. 7, the transmitting device 70 transmits program information to the recording / reproducing device 80 via the transmission path 79. The transmission path 79 is generally a spatial transmission path using satellite broadcasting.
[0085]
The transmission device 70 includes a program management unit 71, a program storage unit 72, encoders 731 to 73n, counters 751 to 75n, a multiplexing unit 77, and a transmission unit 78. The program management unit 71 manages a program sent from the transmission device 70. The program storage unit 72 stores program information to be transmitted. Encoders 731 to 73n receive instructions from transmission management unit 71 and encode program information from program storage unit 72. Each of the counters 751 to 75n sets the count value to 0 by the program head information from the program management unit 71, and increments the count value every time the encoders 731 to 73n create a sequence header. The multiplexing unit 77 divides the encoded information from the plurality of encoders 731 to 73n into transport packets and multiplexes them. The transmission unit 78 performs modulation and up-conversion for transmitting the output of the multiplexing unit 77.
[0086]
The counters 751 to 75n are values obtained by clearing the count value to 0 in response to a signal from the program management unit 71 when the program information given to the corresponding encoders 731 to 73n corresponds to the head of the program. Is output. Each of the encoders 731 to 73n counts when creating a sequence header. T After setting the count values from 751 to 75n in the extended user area of the sequence header, the header information is encoded, and the encoded information is output to the multiplexing unit 77. The encoders 731 to 73n create a frame header for each frame, a GOP header for each GOP, and a sequence header for each predetermined number of GOPs in accordance with the MPEG2 standard. Further, the encoders 731 to 73n each generate a sequence header, then output a signal for incrementing the count values of the counters 751 to 75n, and increment the count values of the counters 751 to 75n. As a result, the serial number in the program, which is 0 at the beginning of the program and incremented for each sequence header, can be sent in the extended user area of the sequence header.
[0087]
The recording / reproducing apparatus 80 includes a tuner 81, a separation unit 82, a decoder 83, a CRT 84, a control unit 85, a PTS detection unit 86, a recording / reproduction control unit 87, a hard disk 88, and a bus 89. ing. Separation unit 82 includes a separation circuit 90 and switches 69, 92, and 93.
[0088]
The tuner 81 selects a program and outputs a transport stream of one transponder. As a recording / reproducing apparatus, a transport stream may be input from an external tuner. The separation unit 82 separates the stream of the specific program and the program related information and switches the stream. The decoder 83 decodes the separated stream and reproduces video and audio. The CRT 84 displays the decoded video. Control unit 8 5 Includes a CPU and controls the entire recording / reproducing apparatus. The header detection unit 86 extracts a count value that is a serial number of a sequence unit in the program from the extended user area of the sequence header in the specific stream. The recording / playback control unit 87 controls the recording and playback of streams on the hard disk 88. The bus 89 is connected to the control unit 8 5 And each block With Are connected, and control signals and the like are transmitted. The separation circuit 90 separates the stream of the specific program and related information from the stream. The switches 91, 92, and 93 switch streams.
[0089]
From the transmitting device 70 to the recording / reproducing device 80, in order to create video / audio encoding information constituting a program, information for extracting a video / audio stream, PCR as a reference clock for decoding video / audio, and a program table Information, detailed content information of the program, etc. are sent simultaneously.
[0090]
FIG. 8 shows an example of a broadcast mode when the same program is broadcast on a plurality of channels. As shown in FIG. Le 3 In 00, 400, and 500, the one-hour program of the title “movie XXX” is repeatedly broadcast. However, it is assumed that the broadcast start time of the program is different between the channels.
[0091]
Hereinafter, an operation in the case where the recording / reproducing apparatus 80 in FIG. 7 records a program broadcast in a manner as shown in FIG. 8 will be described.
When the user instructs to record the channel 300 at the timing C <b> 2, the control unit 85 determines from the program related information already acquired via the separation circuit 90, the title of the program currently broadcast on the channel 300, the program details information, To extract. Next, the control unit 85 determines that the broadcast time is one hour, and displays the title of the program, the detailed program information, and the broadcast time length of the program to be broadcast from the next 9:00. Compare with those of the program to determine whether they match. In this case, since they match, the control unit 85 determines that the program currently broadcast and the program broadcast from 9:00 are the same.
[0092]
Furthermore, the control unit 85 controls the title of the program currently broadcast on the channel 300, the program details information, the program length, the program currently broadcast on the channel 400, and the title and program details of the program broadcast from 9:20. The information and the program length are compared, and the title of the program currently broadcast on the channel 500 and the program broadcast from 9:40, the program detailed information, and the program length are compared to determine whether they match. . In this case, since all three channels match, the control unit 85 repeatedly broadcasts the same program on the channels 300, 400, and 500, and the time lag between the channels is equal to 20 minutes. The channel where the beginning of the program appears first after the recording instruction is given Channel It is determined that the number is 300.
[0093]
Next, the control unit 85 extracts an identifier for separating the streams of the channels 300, 400, and 500 from the multiplexed transport stream from the program related information, and the streams of the channels 300, 400, and 500 are extracted to the separation circuit 90. Instruct to detach. Further, the control unit 85 switches the switch 91 to the tuner output side and the switch 93 to the ON side. Further, the control unit 85 notifies the header detection unit 86 of the identifier of the channel 300 in which the program head appears earliest, and instructs the detection of the count value of the user area expanded in the sequence header. In response, the header detection unit 86 solves the transport packet of the input video, detects the count value included in the extended user area of the sequence header of the video stream in the channel 300, and notifies the control unit 85 of it.
[0094]
The control unit 85 uses the count value first detected by the header detection unit 86 as the recording start timing C2, and instructs the recording / reproduction control unit 87 to record the stream from the timing C2. In response, the recording / reproduction control unit 87 starts recording the streams of the channels 300, 400, and 500 separated by the separation circuit 90 onto the hard disk 88, and sets the recording start position on the hard disk 88 to the recording position at the timing C2. As a temporary store. Thereafter, when the count value 0 is notified from the header detection unit 86, the control unit 85 obtains a value (division result) obtained by dividing the immediately preceding count value by the number of channels (in this case, 3). If it is not divisible, carry it up. Further, the control unit 85 subtracts the difference value obtained by subtracting the count value detected at the recording start timing C2 from the immediately preceding count value from the division result, and temporarily stores the obtained value as the recording end timing C3. Further, since the count value becomes 0, the control unit 85 notifies the recording / reproduction control unit 87 of this as timing C1. The recording / playback control unit 87 temporarily stores the stream recording position on the hard disk 88 at the timing C1.
[0095]
Next, the control unit 85 monitors whether or not the count value of the timing C3 that has already been calculated is the same as the value from the header detection unit 86. The reproduction controller 87 is notified as timing C3, and recording to the hard disk 88 is stopped. Further, the control unit 85 determines from the program related information that the channel in which the program head is generated at the time before the program head appearance of the channel 300 where the program head appears in the recording time and near the program head of the channel 300 is the channel 500. It is determined that the next closest channel is channel 400, the identifiers of the respective channels are arranged in the order of channels 300, 500, and 400, and the identifier of channel 300 where the program head is generated during the last recording is arranged. The created reproduction information is created and notified to the recording / reproduction control unit 87. The recording / reproduction control unit 87 stops recording on the hard disk 88 immediately before the timing C3, determines the recording position on the hard disk 88 at the timing C3, and the recording position and timing at the timing C1 that has already been temporarily stored. The recording position in C2 and the notified reproduction information are recorded in the directory area of the hard disk 88.
[0096]
Next, the operation when the recording / reproducing apparatus in FIG. 7 reproduces the broadcast program recorded in the above-described manner will be described.
When the user gives a reproduction instruction, the control unit 85 instructs the recording / reproduction control unit 87 to reproduce, switches the switch 91 to the recording / reproduction control unit 87 side, and turns on the switch 92. Receiving the reproduction instruction from the control unit 25, the recording / reproduction control unit 87 reads the recording position information and reproduction information recorded in the directory area of the hard disk 88, notifies the reproduction information to the control unit 85, and the timing of the hard disk 88. The stream from the recording position of C1 is read sequentially.
[0097]
When receiving the reproduction information from the recording / reproduction control unit 87, the control unit 85 sets the identifier of the channel 300 arranged first in the separation circuit 90. As a result, only the stream of the channel 300 is extracted in the separation circuit 90 from the stream read from the hard disk 88, and the decoding is performed. Da 8 3 is decoded and displayed on the CRT 84. The recording / playback control unit 87 constantly monitors the reading position of the hard disk 88. When the recording position at time C3 is reached, the recording / reproducing control unit 87 notifies the control unit 85 that the stream reading up to time C3 has ended.
[0098]
The recording / reproducing control unit 87 continues reading from the recording position at the timing C2. At this time, the control unit 85 sets the identifier of the channel 500 arranged next to the reproduction information in the separation circuit 90. As a result, the stream read from the hard disk 88 is separated from the separation circuit. 9 At 0, only the stream of channel 500 is extracted and decoded. Da 8 3 is decoded and displayed on the CRT 84. Further, the recording / reproducing control unit 87 monitors the reading position of the hard disk 88 in the same manner as described above, and when the recording position at the time timing C3 is reached, notifies the control unit 85 that the reading of the stream up to the timing C3 has ended. .
[0099]
The recording / reproduction control unit 87 then starts reading from the recording position at timing C2. At this time, the control unit 85 sets the identifier of the channel 400 arranged next to the reproduction information in the separation circuit 30. As a result, only the stream of the channel 400 is extracted in the separation circuit 30 from the stream read from the hard disk 88 and decoded. Da 8 3 is decoded and displayed on the CRT 84. Further, the recording / reproducing control unit 87 monitors the reading position of the hard disk 88 in the same manner as described above, and when the recording position at the timing C3 is reached, notifies the control unit 85 that the reading of the stream up to the timing C3 has been completed.
[0100]
The recording / reproduction control unit 87 then starts reading from the recording position at timing C2. At this time, the control unit 85 sets the identifier of the channel 300 arranged next to the reproduction information in the separation circuit 90. As a result, only the stream of the channel 300 is extracted from the stream read from the hard disk 88 by the separation circuit 90, and is decoded. Da 8 3 is decoded and displayed on the CRT 84. Further, the control unit 85 notifies the recording / reproduction control unit 87 that the reproduction information has become the identifier separation of the last channel. In response, the recording / reproducing control unit 87 stops reading from the hard disk 88 when the recording position at the timing C1 is reached.
[0101]
As is clear from the above description, the stream read from the hard disk 88 and separated by the separation circuit 90 becomes a continuous stream for one hour from the beginning of the program and is decoded by the decoder 83 and displayed on the CRT 84 from the beginning of the program. Is done.
[0102]
In the fourth embodiment, since the reproduction is performed in an order different from the order of the transmitted streams, the PCR and PTS values of the reproduced streams do not become continuous values when the timing C33 is shifted to the timing C2. However, at the time of playback, the PCR value and PTS value at timing C1 are used as a reference, and the PCR value and PTS value after timing C2 are easily set to continuous values by providing an offset by the program time length divided by the number of channels Can do.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a recording / reproducing apparatus according to a first embodiment of the present invention.
FIG. 2 is a diagram showing an example of a broadcast mode of a program on a certain channel.
FIG. 3 is a block diagram showing a configuration of a recording / reproducing apparatus according to a second embodiment of the present invention.
FIG. 4 is a diagram illustrating an example of a broadcasting mode when the same program is broadcast on a plurality of channels.
FIG. 5 is a block diagram illustrating a configuration of a transmission device and a recording / reproduction device according to a third embodiment of the present invention.
FIG. 6 is a diagram showing an example of a broadcast mode of a program on a certain channel.
FIG. 7 is a block diagram showing a configuration of a transmission device and a recording / reproduction device according to a fourth embodiment of the present invention.
FIG. 8 is a diagram illustrating an example of a broadcasting mode when the same program is broadcast on a plurality of channels.
[Explanation of symbols]
1, 21, 51, 81 ... tuner
2,22,52,82 ... separation part
3, 23, 53, 83 ... decoder
4, 24, 54, 84 ... CRT
5, 25, 55, 85 ... control unit
6, 26, 56, 86 ... PTS detector
7, 27, 57, 87... Recording / reproduction control unit
8, 28, 58, 88 ... Hard disk
9, 29, 59, 89 ... control bus
10, 30, 60, 90 ... separation circuit
11-13, 31-33, 61-63, 91-93 ... switch
41, 71 ... Program management section
42, 72 ... program storage section
431-43n, 731-73n ... Encoder
451-45n, 751-75n ... counter
47, 77 ... Multiplexer
48, 78 ... Transmitter
49, 79 ... transmission path

Claims (7)

A recording / reproducing apparatus for recording and reproducing information of various programs sent by digital broadcasting,
Recording means including a predetermined recording medium;
When the digital broadcast includes a predetermined channel for broadcasting the same program continuously and repeatedly, when the recording start of the program to be repeatedly broadcast is instructed, the current time T2 and the program to be broadcast repeatedly A time detecting means for detecting the next repeated start time T1 and program time length, and a recording end time T3 obtained by adding the program time length to the current time T2,
When various times are detected by the time detection means, during the time period from the current time T2 to the recording end time T3, the digital broadcast transport stream including at least the stream of the predetermined channel is stored in the recording means. Recording control means for recording;
Recording position storage means for storing the respective recording positions on the recording means at the current time T2, the repeated start time T1 and the recording end time T3;
When the reproduction start of the program that is repeatedly broadcast is instructed, the recording unit first refers to the various recording positions stored in the recording position storage unit, so that the recording unit starts from the recording position at the repeated start time T1. Reproduction control means for reproducing the transport stream existing up to the recording position at the end time T3 and subsequently reproducing the transport stream existing from the recording position at the current time T2 to the recording position at the repeated start time T1; A recording / reproducing apparatus. Separating means for separating and extracting at least program-related information from the transport stream of the digital broadcast;
Determination means for determining whether or not the digital broadcast includes a predetermined channel for continuously repeating the same program based on the program related information;
The time detection means detects the repeated start time T1 and the program time length based on the program related information when the determination means determines that the digital broadcast includes the predetermined channel. The recording / reproducing apparatus according to claim 1, wherein: The separation means further separates and extracts the stream of each channel from the transport stream of the digital broadcast,
The recording control means extracts an identifier for identifying the predetermined channel from the program related information, and sets the identifier in the separation means, thereby separating the stream of the predetermined channel, and as a result The recording / reproducing apparatus according to claim 2, wherein the separated stream of the predetermined channel is recorded in the recording unit. The separating means further separates and extracts a PCR that is sent from the digital broadcast transport stream at regular time intervals and serves as a reference time for decoding the program,
The time detection means converts the repetition start time T1, the current time T2, and the recording end time T3 into corresponding PCR values,
The recording control means controls the recording timing of the stream of the predetermined channel by comparing various PCR values converted by the time detection means with real-time PCR separated by the separation means. The recording / reproducing apparatus according to claim 3. PTS detection means for detecting a PTS value included in the stream of the specific channel separated by the separation means and sent every predetermined number of video frames,
The time detection means converts the repeated start time T1, the current time T2, and the recording end time T3 into corresponding PTS values,
The recording control means controls the recording timing of the stream of the predetermined channel by comparing various PTS values converted by the time detection with a real-time PTS detected by the PTS detection means. The recording / reproducing apparatus according to claim 3. A recording / reproducing apparatus for recording and reproducing information of various programs sent by digital broadcasting,
The digital broadcast includes a predetermined channel for continuously and repeatedly broadcasting the same program, and an extended user area of a sequence header included in the stream of the predetermined channel includes a head portion of the program. After that, a count value that is incremented every time a sequence header appears is inserted,
Recording means including a predetermined recording medium;
Separating means for separating and extracting at least program-related information and each channel stream from the digital broadcast transport stream;
When it is instructed to start recording the program that is repeatedly broadcast, an identifier for identifying the stream of the predetermined channel is extracted from the program-related information and set in the separation means, and the stream of the predetermined channel is Identifier setting means for separating and extracting;
Header detection means for detecting a count value stored in an extended user area of a sequence header from a stream of a predetermined channel separated by the separation means;
After the instruction to start recording of the program to be repeatedly broadcast, the separation means starts from the time when the count value is first detected by the header detection means until the same count value is detected again thereafter. Recording control means for recording the separated stream of the predetermined channel in the recording means;
The timing at which the recording control unit starts recording the stream of the predetermined channel is set as a recording start timing C2, the timing at which the header detection unit detects the count value 0 is repeatedly set as the start timing C1, and the recording control unit When the recording end timing of the stream of the current channel is defined as the recording end timing C3, recording for storing the recording position of the stream on the recording means at the recording start timing C2, the repetitive head timing C1 and the recording end timing C3 Position storage means;
When the reproduction start of the program to be repeatedly broadcast is instructed, the recording unit first refers to the various recording positions stored in the recording position storage unit, so that the recording unit starts from the recording position of the repeated start timing C1. A recording control unit that reproduces a stream that exists up to the recording position of the end timing C3 and then reproduces a stream that exists from the recording position of the recording start timing C2 to the recording position of the repeated start timing C1. Playback device. Based on the program-related information separated by the separation means, further comprising determination means for determining whether or not the predetermined channel is included in the digital broadcast;
7. The identifier setting unit according to claim 6, wherein the identifier setting unit performs an identifier setting operation to the separation unit in response to determining that the predetermined channel is included in the digital broadcast. Recording / playback device.

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