JP2000041011A - Device and method for information output and providing medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain correct successive continuous output of transport packets by extracting program clock reference and the transport packets from an inputted stream, generating a clock synchronized with the program clock reference, and generating a time stamp in synchronism with it and generating information showing its continuity. SOLUTION: A transport stream of one or several programs extracted from a transport stream wherein television programs are multiplexed are inputted to a terminal 1. The transport stream inputted from the terminal 1 is supplied to a bit stream purser 2 and PCR is read out of the header of a transport packet. The transport packet is supplied to an information adding circuit 42 and the PCR is supplied to a PLL circuit 4. The PLL circuit 4 generates clocks of 27 MHz or its main factors in synchronism with the inputted PCR and outputs them to a time stamp generating circuit 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information output apparatus, an information output method, and a supply medium, and more particularly, to an information output apparatus, an information output method, and an information supply medium capable of reliably and continuously reproducing a plurality of streams. About.

[0002]

2. Description of the Related Art DVB (Digital Video Broadcasting), D
In digital television broadcasting such as TV (Digital Television), a transport stream of MPEG2 systems (ISO / IEC13818-1) is used for a multiplexing method. In the transport stream, a video stream and an audio stream are multiplexed in units of 188-byte transport packets.

[0003] When transport packets of one or several television programs are extracted from a transport stream in which a plurality of television programs are multiplexed, the extracted transport packets are transmitted at irregular intervals. Will appear.

That is, as shown in FIG. 1, transport packets of a plurality of channels (four channels A to D in the example of FIG. 1) are multiplexed in a stream transmitted via a satellite. Have been. When, for example, transport packets of channel A are extracted from this stream, the generation timing of each transport packet A1 to A5 (the interval between adjacent transport packets Ai and Ai + 1) becomes irregular.

However, when recording such transport packets Ai on a recording medium, if the intervals are provided, the capacity of the recording medium cannot be used effectively, so the intervals between the transport packets Ai are reduced. Will be recorded.

However, when the transport packet Ai thus recorded is reproduced from a recording medium,
The timing at which each transport packet Ai is output needs to match the transmitted timing.
Otherwise, the T-STD (Transport-Sy
The input timing to the stem target decoder) is different from that at the time of encoding, and T-STD breaks down. Therefore, as shown in FIG. 1, a time stamp TSi indicating each generation timing is simultaneously recorded in each transport packet.

FIG. 2 shows a configuration example of an apparatus for recording a transport stream based on such a principle. In the transport stream input from the terminal 1, a program clock reference (PCR) is read from a transport packet header in the bit stream parser 2. The transport packet is supplied to the time stamp adding circuit 3, and the PCR is
It is supplied to the circuit 4. The PLL circuit 4 generates a clock having a frequency of 27 MHz in synchronization with the input PCR, and outputs the clock to the time stamp generation circuit 5. The time stamp generation circuit 5 counts the input clock, and outputs a time stamp (time) corresponding to the count value.
_stamp_counter) and outputs it to the time stamp adding circuit 3.

As shown in FIG. 3, the time stamp adding circuit 3 adds a 3-byte TSP_extra_header to 187 bytes of the 188-byte transport packet excluding the leading 1-byte sync byte, and forms a 190-byte transport packet. Generate a block of. Figure 4 shows the TSP_extra_header
As shown in the figure, a 21-bit time_stamp_counter is arranged. time_stamp_counter represents the expected arrival time of the first bit of the first byte of the transport packet in the input of the smoothing buffer defined in ISO / IEC13818-1.

The format shown in FIG. 3 is a format when the transport stream recording device is a consumer-use digital VCR (Video Cassette Recorder).

The data output from the time stamp adding circuit 3 is supplied to a storage medium 7 via a smoothing buffer 6 and recorded.

The storage medium 7 on which the transport stream is recorded is reproduced by a reproducing apparatus having a configuration as shown in FIG. That is, the transport stream reproduced from the storage medium 7 is input to the time stamp separation circuit 21, where it is separated into a transport packet and a time_stamp_counter. The transport packet is output from the output control circuit 23.
The time_stamp_counter is supplied to the comparator 22 and the timing generation circuit 24.

The timing generation circuit 24 performs the first time_s
Clock generation circuit 2 with the value of tamp_counter as the initial value
The clock of the frequency of 27 MHz generated by the counter 5 is counted by the counter, and the count value (time stamp) is output to the comparator 22. The comparator 22 calculates the value of the time_stamp_counter supplied from the time stamp separation circuit 21,
When the value of the counter supplied from the timing generation circuit 24 matches, the output control circuit 23 is controlled to output the transport packet supplied from the time stamp separation circuit 21 from the terminal 26.

That is, the comparator 22 outputs the transport packet A1 from the output control circuit 23 when the value of the counter output from the timing generation circuit 24 becomes TS1, and when the value of the counter becomes TS2, The output control circuit 23 outputs the transport packet A2. Hereinafter, similar processing is performed. Therefore, the transport packet Ai is output at the same timing as at the time of encoding. As a result, T-
This prevents the STD from breaking down.

[0014]

However, as shown in FIG. 6, for example, when the stream of channel A and the stream of channel H are combined by editing, the time stamp TSn of the last transport packet An of channel A is , The time stamp TS11 of the first transport stream packet H1 of the channel H has no relevance, so that both are discontinuous.

As a result, the data in which a plurality of streams have been edited are recorded on a storage medium, and when the data is reproduced, a timing generating circuit is provided in a switching section for transport packets of channel A and transport packets of channel H. The time stamp output by the time stamp 24 has a value that does not correspond to the time stamp output by the time stamp separation circuit 21, and there has been a problem that the output control circuit 23 cannot be correctly controlled.

The present invention has been made in view of such a situation, and it is an object of the present invention to enable a transport packet to be correctly and continuously output even when a plurality of streams are combined.

[0017]

An information output device according to the first aspect of the present invention includes an extracting unit for extracting a program clock reference and a transport packet from an input stream, and a synchronizing operation with the program clock reference extracted by the extracting unit. Clock generating means for generating the generated clock, time stamp generating means for generating a time stamp in synchronization with the clock generated by the clock generating means, and generating means for generating information indicating the continuity of the time stamp. It is characterized by the following.

According to a fourth aspect of the present invention, there is provided an information output method comprising: an extracting step of extracting a program clock reference and a transport packet from an input stream; and a clock generating a clock synchronized with the program clock reference extracted in the extracting step. The method includes a generating step, a time stamp generating step of generating a time stamp in synchronization with the clock generated in the clock generating step, and a generating step of generating information indicating continuity of the time stamp.

According to a fifth aspect of the present invention, there is provided the providing medium, wherein an extraction step of extracting a program clock reference and a transport packet from an input stream, and a clock generation for generating a clock synchronized with the program clock reference extracted in the extraction step. Steps and
A computer that causes an information output device to execute a process including a time stamp generation step of generating a time stamp in synchronization with the clock generated in the clock generation step, and a generation step of generating information indicating continuity of the time stamp. A readable program is provided.

According to a sixth aspect of the present invention, there is provided the information output device, wherein the time stamp, a selecting means for selecting any one of the plurality of streams, and the continuity of the time stamp when one stream is selected by the selecting means. And rewriting means for rewriting information representing

According to a seventh aspect of the present invention, in the information output method, a time stamp, a selecting step of selecting one of a plurality of streams, and a continuity of the time stamp when one stream is selected in the selecting step. And a rewriting step of rewriting information representing

According to the present invention, there is provided a medium for providing a time stamp, a selecting step of selecting one of a plurality of streams, and a continuity of the time stamp when one stream is selected in the selecting step. A computer-readable program for causing an information output device to execute a process including a rewriting step of rewriting information to be represented is provided.

According to a ninth aspect of the present invention, there is provided an information output apparatus, comprising: separating means for separating information indicating continuity of a time stamp, a time stamp, and a transport packet; generating means for generating a timing signal; Comparing means for comparing the timing signal thus separated with the time stamps separated by the separating means, output control means for controlling the output of the transport packets separated by the separating means in response to the comparison result of the comparing means, Based on the stamp continuity information and the time stamp,
Timing control means for controlling a timing signal generated by the generation means.

The information output method according to a twelfth aspect of the present invention provides an information output method, comprising: a separation step of separating information indicating the continuity of a time stamp, a time stamp, and a transport packet;
A generating step for generating a timing signal; a comparing step for comparing the timing signal generated in the generating step with the time stamp separated in the separating step; and a separating step corresponding to the comparison result in the comparing step. An output control step of controlling the output of the transport packet, and a timing control step of controlling the timing signal generated in the generation step based on the information indicating the continuity of the time stamp and the time stamp. And

According to a thirteenth aspect of the present invention, a providing medium is generated by a separating step of separating information indicating a continuity of a time stamp, a time stamp, and a transport packet; a generating step of generating a timing signal; and a generating step. A timing signal, a comparison step of comparing the time stamps separated in the separation step, and an output control step of controlling the output of the transport packet separated in the separation step in accordance with the comparison result in the comparison step; A computer-readable program for causing an information output device to execute a process including information indicating continuity of a time stamp and a timing control step of controlling a timing signal generated in the generation step based on the time stamp is provided. It is characterized by the following.

An information output device according to claim 1, and an information output device according to claim 4.
In the information output method described in the item (1) and the providing medium described in the item (5), a program clock reference and a transport packet are extracted from an input stream, and a clock synchronized with the extracted program clock reference is generated. A time stamp is generated in synchronization with the clock thus generated, and information indicating the continuity of the time stamp is generated.

[0027] The information output device according to claim 6, and claim 7.
In the information output method according to the first aspect of the invention and the providing medium according to the eighth aspect, when one of a plurality of streams is selected and one of the streams is selected, the continuity of the time stamp is represented. The information is rewritten.

[0028] An information output device according to claim 9, wherein
In the information output method according to the second aspect and the providing medium according to the thirteenth aspect, the time stamp, the information indicating the continuity of the time stamp, and the transport packet are separated, and the timing signal and the comparison result of the time stamp are separated. Correspondingly, the output of the transport packet is controlled, and the timing signal is controlled based on the information indicating the continuity of the time stamp and the time stamp.

[0029]

FIG. 7 is a block diagram showing an example of the configuration of a transport stream recording apparatus to which the information output apparatus of the present invention is applied. The description is omitted as appropriate. That is, in this configuration example, the time stamp adding circuit 3 in FIG. 2 is changed to an information adding circuit 42, and the information adding circuit 42 outputs the ts
The point that c_discontinuity_indicator is supplied is different from the case in FIG. 2, and other configurations are the same as those in FIG.

Next, the operation will be described. Terminal 1
, A transport stream of one or several extracted programs from a transport stream in which a plurality of television programs are multiplexed is input. The transport stream input from the terminal 1 is supplied to the bit stream parser 2, where the PCR is read from the header of the transport packet. The transport packet is supplied to the information adding circuit 42, and the PCR is supplied to the PLL circuit 4. PL
The L circuit 4 generates a clock having a frequency of 27 MHz in synchronization with the input PCR and outputs the clock to the time stamp generation circuit 5. The time stamp generation circuit 5 counts the input clock with a built-in counter, and counts time_stamp_c
An ounter is generated and output to the information adding circuit 42.

The generation circuit 41 generates a flag tsc_discontinu having a value of 0, which means that time_stamp_counter is continuous.
ity_indicator is always generated and output to the information adding circuit 42. The information adding circuit 42 converts the transport packet input from the bit stream
VDR_MPEG2_transport_stre in the format shown in (A)
Record as am. As shown in the figure, this VDR_MPEG2_
For transport_stream, besides transport_packet (), TSP_
extra_information () is included and this TSP_extra_i
As shown in FIG. 9, the time_stamp_counter output by the time stamp generation circuit 5 and the generation circuit 4
The tsc_discontinuity_indicator output by 1 is recorded. In this example, time_stamp
_counter is 24 bits, tsc_discontinuity_indi
cator is 1 bit.

As shown in FIG. 8B, the TSP_extra_information () may be added before the transport packet.

The information adding circuit 42 adds the time_stamp_count input from the time stamp generating circuit 5 to the transport packet input from the bit stream parser 2.
er and tsc_discontinuity_ input from the generation circuit 41
An indicator is added, and the data is supplied to the storage medium 7 via the smoothing buffer 6 and recorded.

FIG. 10 shows a configuration example of an editing apparatus for editing the storage medium 7 on which the transport stream is recorded as described above. In this configuration example, one output of the storage medium 7-1 and the storage medium 7-2 is connected to the TDI via the switch 62.
(Tsc_discontinuity_indicator) is input to the rewriting circuit 63. The editing control circuit 61 selects one of the outputs of the storage medium 7-1 and the storage medium 7-2 by controlling the switch 62 and performs editing. When editing is performed (switch 6
2), the editing control circuit 61 controls the TDI rewriting circuit 63, rewrites the flag tsc_discontinuity_indicator of the input transport stream, outputs the flag to the storage medium 64, and records it.

In FIG. 10, a plurality of transport stream files may be recorded on one storage medium and edited.

Next, the operation will be described with reference to the flowchart of FIG. The edit control circuit 61
Storage medium 7-1 and storage medium 7
-2 is reproduced, and one of its outputs is selected by switching the switch 62 and supplied to the TDI rewriting circuit 63. The edit control circuit 61 determines in step S11
It is determined whether the switch 62 has been switched.

If it is determined in step S11 that the switch 62 has been switched, the process proceeds to step S12, where the editing control circuit 61 controls the TDI rewriting circuit 63 and sets the flag tsc_discontinuity_indicator of the stream input via the switch 62. , Time_stamp_counte
Let r be rewritten to the value 1 indicating that r is discontinuous.

When the processing in step S12 is completed, or when it is determined in step S11 that the switch 62 has not been switched, the flow advances to step S13 to determine whether or not the transport stream input from the switch 62 has ended. Is determined, and if not finished,
Returning to step S11, the subsequent processing is repeatedly executed. If it is determined in step S13 that the transport stream has ended, the process ends.

As described above, the TDI rewriting circuit 63
In, if necessary, the flag tsc_discontinuity_in
The stream whose dicator has been rewritten is supplied to the storage medium 64 and recorded.

As described above, the storage medium 64 on which data has been recorded is reproduced by, for example, a reproducing apparatus having a configuration as shown in FIG. 12, the same reference numerals are given to the portions corresponding to the playback device shown in FIG. 5, and the description thereof will be omitted as appropriate. In this reproducing apparatus, data reproduced from the storage medium 64 is input to the information separating circuit 81, where the transport packet, the flag tsc_discontinuity_indicato
r and time_stamp_counter are extracted. The transport packet is output from the output control circuit 2
3, the tsc_discontinuity_indicator is supplied to the initial value reset control circuit 82, and the time_stamp_count
er is supplied to the initial value reset control circuit 82 and the comparator 22. Initial value reset control circuit 8
2 resets the timing generation circuit 24 when the flag tsc_discontinuity_indicator is 1, and resets the time_stamp
The value of _counter is set as an initial value. Other configurations are the same as those in FIG.

Next, the operation will be described. The data reproduced from the storage medium 64 is input to the information separation circuit 81. The information separation circuit 81 separates a transport packet from the input transport stream and outputs the transport packet to the output control circuit 23. The information separation circuit 81 extracts the flag tsc_discontinuity_indicator from the input transport stream, outputs the flag tsc_discontinuity_indicator to the initial value reset control circuit 82, and
The mp_counter is extracted and output to the initial value reset control circuit 82 and the comparator 22.

The timing generation circuit 24 counts a clock having a frequency of 27 MHz generated by the clock generation circuit 25 with a built-in counter, and outputs the count value (time stamp) to the comparator 22. The comparator 22 calculates the count value and the time input from the information separation circuit 81.
The values of _stamp_counter are compared, and when they match, the output control circuit 23 is controlled to output the transport packet input from the information separation circuit 81 from the terminal 26. This process is the same as the case of the playback device shown in FIG.

The initial value reset control circuit 82 executes a process as shown in the flowchart of FIG. That is, in step S21, it is determined whether or not the flag tsc_discontinuity_indicator input from the information separation circuit 81 is 1. If this flag is not 1 (if it is 0), the process proceeds to step S23. That is,
In this case, the same processing as in the conventional case is performed.

In step S21, the flag tsc_disc
When it is determined that ontinuity_indicator is 1, the process proceeds to step S22, and the initial value reset control circuit 82
The timing generation circuit 24 is reset. At that time, the time_sta input from the information separation circuit 81 is
The value of mp_counter is supplied to the timing generation circuit 24, and the built-in counter is set as an initial value. Therefore, thereafter, the timing generation circuit 24 generates a time stamp based on the set initial value.

As a result, for example, in the case of the example shown in FIG.
Before the timing of outputting the transport packet H1 after the transport packet An, the timing generation circuit 24 sets the value of time_stamp_counter as an initial value in a counter built in the TS11. And
Thereafter, the counter counts the clock with reference to the initial value TS11, so that the time stamp matches the time stamp of the channel H. Therefore, even if the value of time_stamp_counter is discontinuous, the output control circuit 23 can output a transport packet at a correct timing.

The above tsc_discontinuity_indicator
When a transport packet having a value of 1 is detected, the timing at which the packet is output from the output control circuit 23 is determined by the output control circuit 2
It is preferable that a predetermined time has elapsed after the output from the output unit 3. Here, the predetermined time is specifically one second. This one second means that tsc_discontinuity_indicator is 1
Output control circuit 2 before the transport packet
3 is the maximum time it takes for the data output from 3 to be decoded by the buffer on the receiving (decoder) side. (The MPEG2 Systems standard stipulates that a transport packet is decoded within one second after being input to the reception buffer of the decoder.) Tsc_discontinuity_in
The timing at which a transport packet whose dicator is 1 is output from the output control circuit 23 is 1
If one second elapses after the previous packet is output from the output control circuit 23, the reception buffer does not overflow. Note that tsc_discontinuity_indicator
Is output to the IEEE1394 digital interface when the packet is 1
It is preferable to transmit a transport packet of a DIT (Discontinuity Information Table) specified by the DVB standard (EN 300 468) to the receiving side.

In step S21, the flag tsc_disc
When it is determined that the value of ontinuity_indicator is not 1 (when it is determined that it is 0), and in step S
At 22, after the reset processing of the timing generation circuit 24 is completed, the process proceeds to step S23, where it is determined whether or not the transport stream has been completed. If the transport stream has not been completed, the process returns to step S21. The process is repeatedly executed. If it is determined in step S23 that the transport stream has ended,
The process ends.

In the transport stream recording apparatus having the configuration shown in FIG. 7, tsc_disc is used as information indicating a transport packet in which a time stamp discontinuity occurs.
Although the case where ontinuity_indicator is added to the transport packet has been described, the present invention is not limited to this, and the tsc_discontinuity_indicator may be recorded in another stream (file) independent of the transport stream body.
For example, a reproduction management file representing the reproduction contents of a transport stream recorded on a recording medium may be recorded, and information indicating a transport packet in which a time stamp discontinuity occurs may be managed therein.

FIG. 14 shows the configuration of another embodiment of the transport stream recording apparatus in that case. The same parts as those shown in FIG. 2 are given the same numbers,
The description is omitted. The recording control circuit 102 records, on the storage medium 7, a reproduction management file for an original reproduction path corresponding to the transport stream recorded from the recording start time to the end time specified by the user interface 101.

For example, FIG. 15 (A) or FIG. 15 (B)
When the transport stream file shown in FIG. 16 is recorded, the reproduction management file shown in FIG. 16A or FIG. 16B is recorded on the storage medium 7, respectively. The original playback management file records the file name, time, and address, and has no discontinuity in the time stamp.

FIG. 17 shows an example of the configuration of an editing device for editing the storage medium 7 on which the transport stream is recorded in this case. Information of a transport packet in which time stamp discontinuity occurs due to editing is recorded on the storage medium 7 as a playback management file for the edited playback path.

For example, when the playback path shown in FIG. 18 is designated, the edited playback management file for the playback path shown in FIG. 19 is recorded on the storage medium 7. In this reproduction management file, a file name, a time, and an address corresponding to the edited reproduction path are recorded, and further, a position (time) at which a discontinuity of a time stamp occurs is recorded. In FIG. 17, the transport stream files 1 and 2 may be recorded on one storage medium.

FIG. 20 shows a configuration example of the transport stream reproducing apparatus in this case. In the transport stream reproducing apparatus shown in FIG. 12, information indicating discontinuity of the time stamp is obtained from the information added to the transport packet. On the other hand, in the transport stream reproducing apparatus shown in FIG. Is received from the reproduction management file. Prior to the reproduction of the transport stream, the reproduction control circuit 122 reads the reproduction management file from the storage medium 64, and based on the time value of the time stamp added to the transport packet in which the time stamp discontinuity occurs. , A signal for resetting the initial value reset control circuit 82 is supplied.

The time stamp separation circuit 121 reads a transport packet from the storage medium 64 based on, for example, the reproduction path shown in FIG. 18, and outputs the transport packet to the output control circuit 23.
_stamp_counter is supplied to the initial value reset control circuit 82 and the comparator 22.

As described above, even if the time stamp is discontinuous, the transport stream recording apparatus having the configuration shown in FIG. 14 records the tsc_discontinuity_indicator in a stream different from the transport stream, and
If the stream is reproduced by the transport stream reproducing apparatus having the configuration shown in FIG.

In this specification, the system is
It is assumed that the device as a whole is constituted by a plurality of devices.

As a providing medium for providing a user with a computer program for performing the above processing,
In addition to recording media such as magnetic disks, CD-ROMs, and solid-state memories, communication media such as networks and satellites can be used.

[0058]

As described above, the information output device according to claim 1, the information output method according to claim 4, and the claim 5
According to the providing medium described in (1), the program clock reference and the transport packet are extracted from the input stream, a clock synchronized with the extracted program clock reference is generated, and the time stamp is synchronized with the generated clock. Is generated, and information indicating the continuity of the time stamps is generated. Therefore, even if the time stamps are discontinuous, it is possible to provide a stream that can be continuously reproduced.

An information output device according to claim 6, and an information output device according to claim 7.
According to the information output method described in (1) and the providing medium described in (8), the time stamp and the continuity of the time stamp when one of a plurality of streams is selected and one stream is selected. Since the information to be represented is rewritten, it is possible to provide a stream that can be reproduced continuously even if the time stamp is discontinuous.

An information output device according to claim 9, wherein
According to the information output method described in Item 2 and the providing medium described in Item 13, the time stamp, the information indicating the continuity of the time stamp, and the transport packet are separated, and the timing signal is compared with the time stamp. In response to the output of the transport packet is controlled,
Since the timing signal is controlled based on the information indicating the continuity of the time stamp and the time stamp, it is possible to provide a stream that can be reproduced continuously even if the time stamp is discontinuous. It becomes possible.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a time stamp.

FIG. 2 is a block diagram illustrating a configuration example of a conventional transport stream recording device.

FIG. 3 is a diagram illustrating a format of a transport packet output from the time stamp adding circuit 3 of FIG. 2;

FIG. 4 is a diagram illustrating the configuration of TSP_extra_header in FIG.

FIG. 5 is a block diagram illustrating a configuration example of a conventional transport stream playback device.

FIG. 6 is a diagram illustrating discontinuity of time stamps.

FIG. 7 is a block diagram showing a configuration of an embodiment of a transport stream recording device according to the present invention.

8 is a diagram showing VDR_MPEG2_ generated by the information adding circuit 42 in FIG. 7;
FIG. 3 is a diagram illustrating a configuration of transport_stream.

9 is a diagram illustrating the configuration of TSP_extra_information in FIG.

FIG. 10 is a block diagram illustrating a configuration of an embodiment of an editing device according to the present invention.

11 is a flowchart illustrating the operation of the editing control circuit 61 of FIG.

FIG. 12 is a block diagram illustrating a configuration of an embodiment of a transport stream playback device according to the present invention.

13 is a flowchart illustrating an operation of the initial value reset control circuit 82 of FIG.

FIG. 14 is a block diagram showing a configuration of another embodiment of the transport stream recording device according to the present invention.

FIG. 15 is a diagram illustrating an example of a reproduction path.

FIG. 16 is a diagram illustrating an example of a playback management file.

FIG. 17 is a block diagram showing a configuration of another embodiment of the editing apparatus according to the present invention.

FIG. 18 is a diagram illustrating an example of a reproduction path.

FIG. 19 is a diagram illustrating an example of a playback management file.

FIG. 20 is a block diagram showing a configuration of another embodiment of the transport stream playback device according to the present invention.

[Explanation of symbols]

2 bit stream parser, 4 PLL circuit, 5
Time stamp generation circuit, 22 comparator, 23 output control circuit, 24 timing generation circuit, 41 generation circuit, 42 information addition circuit, 61 editing control circuit,
62 switch, 63 TDI rewrite circuit, 81
Information separation circuit, 82 initial value reset control circuit,
102 recording control circuit, 121 time stamp separation circuit, 122 reproduction control circuit

Claims (13)

[Claims] An extracting unit for extracting a program clock reference and a transport packet from an input stream; a clock generating unit for generating a clock synchronized with the program clock reference extracted by the extracting unit; An information output device, comprising: a time stamp generating unit that generates a time stamp in synchronization with a clock generated by the unit; and a generating unit that generates information indicating continuity of the time stamp. 2. The apparatus according to claim 1, further comprising an adding unit for adding a time stamp generated by said time stamp generating unit and information generated by said generating unit to a transport packet extracted by said extracting unit. The information output device according to claim 1. 3. The apparatus according to claim 1, further comprising file recording means for recording a time stamp generated by said time stamp generation means and information generated by said generation means in a reproduction management file. Information output device. 4. An extraction step for extracting a program clock reference and a transport packet from an input stream; a clock generation step for generating a clock synchronized with the program clock reference extracted in the extraction step; An information output method, comprising: a time stamp generating step of generating a time stamp in synchronization with a clock generated in the step; and a generating step of generating information indicating continuity of the time stamp. 5. An extraction step for extracting a program clock reference and a transport packet from an input stream; a clock generation step for generating a clock synchronized with the program clock reference extracted in the extraction step; A computer that causes the information output device to execute a process including a time stamp generating step of generating a time stamp in synchronization with the clock generated in the step, and a generating step of generating information indicating the continuity of the time stamp. A providing medium characterized by providing a possible program. 6. A time stamp, selecting means for selecting any one of a plurality of streams, and, when one of the streams is selected by the selecting means, rewriting the information indicating the continuity of the time stamp. An information output device comprising a rewriting means. 7. A time stamp, a selecting step of selecting one of a plurality of streams, and, when one of the streams is selected in the selecting step, rewriting the information indicating the continuity of the time stamp. An information output method comprising a rewriting step. 8. A time stamp, a selecting step of selecting one of a plurality of streams, and, when one of the streams is selected in the selecting step, rewriting the information indicating the continuity of the time stamp. A providing medium for providing a computer-readable program for causing an information output device to execute a process including a rewriting step. 9. Separating means for separating information indicating the continuity of time stamps, time stamps, and transport packets; generating means for generating a timing signal; timing signal generated by the generating means; Comparing means for comparing the time stamps separated by the following; output control means for controlling the output of the transport packet separated by the separating means in accordance with the comparison result of the comparing means; An information output device comprising: a timing control unit that controls a timing signal generated by the generation unit based on the information indicating continuity and the time stamp. 10. The information output device according to claim 9, wherein the separation unit separates information indicating the continuity of the time stamp from the input stream. 11. The information output apparatus according to claim 9, wherein the separating unit separates information indicating the continuity of the time stamp from a reproduction management file. 12. Information indicating continuity of a time stamp,
A separation step of separating a time stamp and a transport packet; a generation step of generating a timing signal; a comparison step of comparing the timing signal generated in the generation step with the time stamp separated in the separation step; An output control step of controlling the output of the transport packet separated in the separation step in accordance with the comparison result in the comparison step; and the information indicating the continuity of the time stamp, and the time stamp A timing control step of controlling the timing signal generated in the generating step based on the information. 13. information indicating continuity of time stamps;
A separation step of separating a time stamp and a transport packet; a generation step of generating a timing signal; a comparison step of comparing the timing signal generated in the generation step with the time stamp separated in the separation step; An output control step of controlling the output of the transport packet separated in the separation step in accordance with the comparison result in the comparison step; and the information indicating the continuity of the time stamp, and the time stamp A computer-readable program for causing an information output device to execute a process including a timing control step of controlling a timing signal generated in the generating step based on the generation step.