JPH10294705A - Method and device for inserting program specification information - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent delay jitters from being produced in a received TS packet, in the case of multiplexing program specification information(PSI) on a received transport stream(TS) and sending the result. SOLUTION: A first-in first-out memory (FIFO) 1 monitors the presence of a received TS packet, and a counter section 3 is used to control a timing for the insertion of a PSI-TS packet which is not to be set to a single point but to be a predetermined period. Furthermore, a PSI control section 2 controls the insertion of the PSI-TS packet within the period, when no received TS packet exists. Thus, in the case of inserting the PSI-TS packet in the received TS, jitters caused in the received TS packet are reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for inserting program specification information and an apparatus for inserting program specification information, and more particularly to an MPEG (Moving Picture Experts Group) multiplexing system specification (ITU-T H.222.0, ISO / IEC 13818). -1), and program specification information (Program Specific Informatio) in a transport stream (hereinafter referred to as TS).
n, hereinafter referred to as PSI) and a device for inserting the PSI.

[0002]

2. Description of the Related Art Conventionally, a technique standardized according to an MPEG multiplexing system specification is known. And this MP
The EG multiplexing system specification prescribes a method for inserting PSI data in the form of a TS packet.
No specific multiplexing realizing method and realizing apparatus are specified.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for receiving a PS in a received TS according to the MPEG multiplexing system specification.
It is an object of the present invention to provide a specific method and apparatus for inserting I data in the form of a TS packet. Hereinafter, specific problems that occur when implementing the program specification information insertion method and the program specification information insertion device according to the above-described specifications will be described.

[0004] The first problem is the timing of PSI data insertion. That is, when PSI data is inserted in the form of a TS packet (hereinafter, referred to as PSI-TS packet insertion), if a PSI-TS packet is inserted regardless of the amount of received TS packets, If there are received TS packets that need to be transmitted, the received TS packets that must be transmitted will be retained while inserting the PSI-TS packets, and the received TS packets that must be transmitted
Delay fluctuation for packet (hereinafter referred to as jitter)
Causes the problem of causing

As a result, a device that receives a TS, decodes the TS, and reproduces a video or the like causes an underflow or an overflow of the TS packet reception buffer when the jitter with respect to the received TS packet is large. This causes a problem of being lost.

The second problem is that the program time reference value (Pro
If there is a jitter in the arrival of a TS packet including gram clock reference (hereinafter, referred to as PCR) data, the content of the PCR data will not match the actual arrival time. That is, since the decoder reproduces the reference time for reproducing a video or the like from the PCR data and the PCR data arrival time, if there is a discrepancy between the content of the PCR data and the actual arrival time, the decoder correctly determines the reference time. There is a problem that time cannot be reproduced.

A first object of the present invention is to provide a PSI insertion method and a PSI insertion apparatus which can solve the above-mentioned problems and can reduce jitter generated in a received TS packet to be transmitted. It is in.

[0008] A second object of the present invention is to provide a method particularly for PCR.
An object of the present invention is to provide a PSI insertion method and a PSI insertion device capable of reducing the jitter occurring in a TS packet including data with the highest priority.

[0009]

In order to achieve the above-mentioned object, the present invention firstly provides a method for generating a TS packet as little as possible in order to minimize the occurrence of jitter in a received TS packet. Monitoring the data amount of the received TS packet, outputting the received TS packet when the received TS packet is equal to or more than a certain amount, and outputting the received TS packet when the received TS packet is less than the certain amount and when it is time to insert the PSI. PSI-TS packets are inserted, and if the received TS packets are less than a certain amount and P
It is characterized in that a null TS packet is inserted when it is not time to insert an SI. Note that a null TS packet is a TS packet whose PID (Packet Identifier) value specified by the MPEG multiplexing system specification is “0x1FFF”.

The present invention secondly sets a time for permitting the insertion of PSI data and a time for forcibly inserting the PSI data irrespective of the amount of received TS packet data, and for each synchronization signal for outputting TS packet data. , The amount of received TS packets is monitored, and the amount of received TS packets is
PSI-T when it is time to forcibly insert
When an S packet is inserted and the received TS packet is above a certain amount and it is not the timing to forcibly insert the PSI, the received TS packet is output, and when the received TS packet is below a certain amount and the PSI insertion is permitted. It is characterized in that a PSI-TS packet is inserted in a certain case, and a null TS packet is inserted in a case where the received TS packet is smaller than a certain amount and the PSI insertion is not permitted.

According to the present invention, thirdly, a time for permitting insertion of PSI data and a time for forcibly inserting PSI data are set, and a reception TS is set for each synchronization signal for outputting TS packet data.
It monitors the presence or absence of a packet and whether the received TS packet contains PCR data. If there is a received TS packet, the TS packet is a TS packet containing PCR data, and it is time to forcibly insert a PSI. A reception TS packet including the PCR data is output as output data for the current synchronization signal, and a PSI-TS packet is inserted as data to be output in the next synchronization signal. If it is a TS packet including data and it is not the timing to forcibly insert the PSI, the received TS packet is output, and if there is a received TS packet and the received TS packet is
If the packet is a TS packet that does not include PCR data and it is the timing to forcibly insert the PSI, a PSI-TS packet is inserted, and if there is a received TS packet and the TS packet does not include the PCR data, If the received TS packet is not present and the timing is not forcibly inserting the PSI, the received TS packet is output.
An I-TS packet is inserted, and a null TS packet is inserted when there is no received TS packet and the PSI insertion is not permitted.

Fourth, the present invention provides a synchronizing signal generating means for outputting TS packet data, a means for holding received TS packets and monitoring the amount of received TS packets, a means for indicating PSI insertion timing, Means for selecting any of a received TS packet, a null TS packet and a PSI-TS packet as data to be output based on the presence / absence of a received TS packet and a PSI insertion timing instruction for each synchronization signal for outputting packet data; Means for outputting the selected packet data.

Fifthly, the present invention provides a synchronizing signal generating means for outputting TS packet data, a means for holding received TS packets and monitoring the amount of received TS packets, a means for instructing PSI forced insertion, Means for instructing insertion permission, presence / absence of a received TS packet for each synchronization signal for outputting TS packet data, PSI forced insertion instruction and P
It is characterized by comprising means for selecting any of a received TS packet, a null TS packet and a PSI-TS packet as data to be output based on the SI insertion permission instruction, and means for outputting the selected packet data.

Sixth, the present invention provides a synchronizing signal generating means for outputting TS packet data, a means for holding a received TS packet and monitoring the presence or absence of the received TS packet, Means for monitoring whether the packet is a packet, means for instructing forced insertion of PSI,
Means for instructing I insertion permission, presence or absence of a received TS packet for each synchronization signal for outputting TS packet data, whether or not the TS packet includes PCR, PSI forced insertion instruction and PSI insertion permission instruction. Received TS packets, null TS packets and PSI-
It is characterized by comprising means for selecting one of the TS packets and means for outputting the selected packet.

A seventh aspect of the present invention is that the means for instructing the forced insertion of PSI data and the means for permitting the insertion of PSI data include a time counter, and a mechanism for resetting the time counter after PSI insertion. It is characterized by having.

Eighth, the present invention provides a means for instructing the forced insertion of PSI data and a means for permitting the insertion of PSI data, comprising: a time counter; A mechanism for resetting the counter is provided.

According to a ninth aspect of the present invention, a means for receiving one or a plurality of TS packets, holding the received TS packets, and monitoring the presence / absence of the received TS packets is based on the fact that the presence or absence of the TS packets
It is characterized in that monitoring is performed with 88 bytes or less.

In the tenth aspect of the present invention, the means for holding the PSI data is changed because the contents of the insertion surface holding the PSI data being inserted and the contents of the reception TS change.
It has two PSI data holding areas with an update plane for holding I data, updates the new PSI data changed while outputting the PSI data on the insertion plane, and updates the new PSI data. After completion of the above, the update plane is changed to a new insertion plane, and PSI data insertion is sequentially performed.

The present invention eleventhly holds PSI data in the form of a TS packet in the form of a TS packet with an insertion indicator attached to each TS packet data, and performs PSI data insertion based on the insertion indicator. Features.

According to the present invention, a twelfth TS packet format P
Means for updating the cyclic counter of the TS packet at the time of SI data insertion, holding the PSI data in the form of a TS packet in the form of a TS packet with an insertion index attached to each TS packet data, and PS
Means for inserting I data, setting an index for updating the cyclic counter in the insertion index, and updating the cyclic counter of the PSI data based on the index for updating the cyclic counter.

[0021]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of a PSI insertion method and apparatus according to the present invention.

FIG. 1 shows a PS according to a first embodiment of the present invention.
FIG. 2 is a block diagram illustrating a configuration of the I insertion device, FIG. 2 is a flowchart illustrating a control operation of a PSI insertion control unit of the PSI insertion device according to the first embodiment of the present invention, and FIG. 3 is a PSI insertion permission time and a PSI forced insertion time. FIG. 4 is a diagram for explaining the relationship of the PSI and PSI insertion timing. In FIG. 1, 1 is F
IFO (First In First Out Memory), 2 is a PSI insertion control unit, 3 is a counter unit, 4 is a PSI memory, 5 is a null TS packet insertion unit, 7 is input means, and 8 is a synchronization signal generation unit. The P according to the first embodiment of the invention shown in FIG.
The SI insertion device determines the data amount of the received TS packet and the PS
In this embodiment, any one of a received TS packet, a null TS packet, and a PSI-TS packet is selected and output based on an I forced insertion instruction and a PSI insertion permission instruction.

The PSI insertion device according to the first embodiment of the present invention shown in FIG.
A counter unit 3 for issuing a PSI forced insertion instruction and a PSI insertion permission instruction, a PSI memory 4 for storing PSI data, a null TS packet insertion unit 5 for holding a null TS packet and performing an insertion operation, Selector 6 and P
An input unit 7 for updating SI data, setting a PSI insertion permission time and setting a PSI forced insertion time, and a synchronization signal generation unit 8 for generating a synchronization signal for outputting a TS packet.

Next, the operation of the PSI insertion device according to the first embodiment of the present invention configured as described above will be described.

The PSI insertion device shown in FIG. 1 is a device which receives one or a plurality of TSs, multiplexes PSI data necessary for the received TSs, and outputs the multiplexed data.
Is used to write necessary PSI data into the PSI memory 4. That is, in writing data to the PSI memory 4, the input means 7 specifies a write destination address using the address signal 52 and writes necessary data to the PSI memory 4 using the data signal 53. The input unit 7 sets the PSI insertion permission time and the PSI forced insertion time in the counter unit 3 using the signal line 50.

The FIFO 1 receives the TS packet signal 20 and outputs the TS packet signal 21 to the selector 6 according to the output control signal 40 from the PSI insertion control unit 2. Also, the FIFO 1 transmits to the PSI insertion control unit 2 as a data amount signal 30 whether or not a certain amount of received TS packet data exists in the FIFO. The synchronization signal generator 8 has a counter inside and transmits a synchronization signal 44 for outputting a TS packet to the PSI insertion controller 2 for every 188 bytes, which is the data length of the TS packet.
Further, the synchronization signal generator 8 sets the counter value for each byte to P
The byte counter value signal 45 is transmitted to the SI insertion control unit 2.

The counter section 3 transmits a PSI insertion permission signal 31 to the PSI insertion control section 2 when the PSI insertion permission time has been reached, based on the PSI insertion permission time and the PSI forced insertion time set by the input means 7. , When the PSI forced insertion time is reached, the PSI forced insertion signal 32
This is transmitted to the insertion control unit 2. The PSI insertion control unit 2 receives the received T packet under the condition of a data amount signal 30, a PSI insertion permission signal 31, and a PSI forced insertion signal 32.
One of an S packet, a null TS packet and a PSI-TS packet is selected and output. The selection method will be described later with reference to FIG.

In the above description, it is assumed that, for example, a received TS packet is selected and output from the PSI insertion device shown in FIG. In this case, the PSI insertion control unit 2
The received TS packet output control signal 40 is transmitted to the FIFO 1 based on the synchronization signal 44 for outputting packet data and the byte counter value signal 45. FIFO1 is
A TS packet is output to the selector 6 as a TS packet signal 21 based on the received TS packet output control signal 40. The PSI insertion control unit 2 outputs the selector control signal 43 so that the TS packet signal 21 output from the FIFO 1 becomes the TS packet signal 24 which is the final output signal of the PSI insertion device shown in FIG.
Is switched.

Also, for example, a null T
It is assumed that the output of the S packet is selected and output. In this case, the PSI insertion control unit 2 transmits a null packet insertion control signal 42 to the null TS packet insertion unit 5 based on the synchronization signal signal 44 for outputting TS packet data and the byte counter value signal 45. The null packet insertion unit 5 outputs a null TS packet to the selector 6 as a null TS packet signal 22 based on the null TS packet insertion control signal 42. The PSI insertion control unit 2 controls the selector control signal 43 so that the null TS packet signal 22 output from the null TS packet insertion unit 5 becomes the TS packet signal 24 which is the final output signal of the PSI insertion device shown in FIG. Is output to switch the selector 6.

Also, for example, a PSI insertion device
-It is assumed that the output of the TS packet is selected and output.
In this case, the PSI insertion control unit 2 specifies an output address based on the synchronization signal 44 for outputting TS packet data and the byte counter value signal 45, and specifies an output address designation signal 51 and a PSI packet insertion control signal 41.
Is transmitted to the PSI memory 4. After starting transmission of the PSI packet insertion control signal 41 to the PSI memory 4, the PSI insertion control section 2 transmits a reset signal 33 to the counter section 3 to reset the counter. PSI memory 4
Converts the PSI-TS packet into a PS based on the output address designation signal 51 and the PSI packet insertion control signal 41.
It is output to the selector 6 as an I-TS packet signal 23. The PSI insertion control unit 2 outputs the selector control signal 43 so that the PSI-TS packet signal 23 output from the PSI memory 4 becomes the TS packet signal 24 which is the final output signal of the PSI insertion device shown in FIG. Then, the selector 6 is switched.

Next, the data amount of the received TS packet, PS
The operation of the PSI insertion control unit 2 for selecting any one of the received TS packet, the null TS packet and the PSI-TS packet based on the I forced insertion instruction and the PSI insertion permission instruction will be described with reference to the flow shown in FIG. .

(1) When the PSI insertion device shown in FIG. 1 is started, the process starts in accordance with the synchronization signal for outputting the TS packet data, and firstly, it is time to forcibly insert the PSI. It is determined whether or not it is (steps 60 and 61).

(2) If it is determined in step 61 that the time for forcibly inserting the PSI has been reached, the PSI-T
The S packet is inserted, and the process returns to step S60.
Processing is started from the start according to the synchronization signal (step 62).

(3) If it is determined in step 61 that the time for forcibly inserting the PSI has not been reached, the reception TS
It is determined whether or not there is a packet and whether or not there is more than a certain amount of data. If there is more than a certain amount of the received TS packet, the received TS packet is output, and the process returns to the step 60 to start from the start according to the synchronization signal. The processing is started (steps 63 and 64).

(4) If it is determined in step 63 that there is no received TS packet or that there is not more than a certain amount, it is determined whether or not the PSI insertion permission time has been reached. Has reached the PSI
-Insert a TS packet and return to the process of step 60;
Processing is started from the start according to the synchronization signal (steps 66 and 62).

(5) If it is determined in step 66 that the PSI insertion permission time has not been reached, a null TS packet is inserted, the process returns to step 60, and the process is started from the start according to the synchronization signal (step 67). .

Next, the relationship between the PSI insertion permitted time and the PSI forced insertion time and the PSI insertion timing will be described with reference to FIG. Hereinafter, the timing of PSI insertion will be described by taking as an example a case where PSI data is inserted at least once per second.

If you want to insert PSI more than once a second,
For example, the PSI forced insertion time is set to one second, and the PSI insertion permission time is set to 0.8 seconds to operate. This makes it possible to insert the PSI once or more per second. In this case, the timer starts counting (8
After 0), the PSI insertion permission time (81) is reached 0.8 seconds later, and the PSI forced insertion time (82) is reached 1 second later.

As described with reference to FIG. 2, if the received TS packet is less than a certain amount and the PSI insertion permission time has been reached, the PSI-TS packet is inserted.
The PSI insertion device shown in FIG. 1 inserts a PSI-TS packet from the PSI insertion permitted time to the PSI forced insertion time, that is, at a timing when the received TS packet is less than a certain amount within the PSI insertion grace period (83). Will be done. However, if there is always a certain amount or more of the received TS packets within the PSI insertion grace period, the PSI-TS packets will be inserted during the PSI forced insertion time.

As described above, the insertion of the PSI-TS packet is performed by the method and timing described with reference to FIGS.

According to the first embodiment of the present invention, the reception T
S packet data amount, PSI forced insertion instruction and PSI
Since there is no received TS packet based on the insertion permission instruction and the PSI-TS packet is inserted during the PSI insertion permitted time, it is possible to reduce the jitter generated in the received TS packet when the PSI-TS packet is inserted. The effect of being possible can be obtained.

In the first embodiment of the present invention described above, the PS
Although it has been described that the counter of the counter unit 3 is reset at the start of the insertion of the I-TS packet, the first embodiment can be modified to reset the counter of the counter unit 3 after the insertion of the PSI-TS packet. Hereinafter, this modified example will be described.

FIG. 4 is a flowchart for explaining the control operation of the PSI insertion control section of the PSI insertion apparatus according to the modification of the first embodiment of the present invention, and FIG. 5 is a view for explaining the reset timing executed by the counter section 3. It is.

The flow shown in FIG. 4 is a modification of the flow shown in FIG. 2, and different points from FIG. 2 will be described below.

If it is determined in step 61 in FIG. 4 that it is the PSI forced insertion time, it is determined that it is time to forcibly insert the PSI, a PSI-TS packet is inserted, and the PSI-TS packet insertion is performed. Thereafter, the counter of the counter unit 3 is reset, and the process returns to the step 60, and the process is started from the start according to the synchronization signal (step 68).

Further, it is determined that there is no received TS packet or that there is no
Step 6 for determining whether or not the insertion permission time has been reached
In P6, if the PSI insertion permission time has been reached, P
After the insertion of the SI-TS packet, the counter of the counter unit 3 is reset after the insertion of the PSI-TS packet, and the processing is started from the start according to the synchronization signal (step 6).
9).

In the above-described modification, the counter is reset after the PSI-TS packet is inserted as described above.

Next, the reset timing of the counter executed by the counter section 3 will be described with reference to FIG. In the example shown in FIG. 5, the flow of time is set to the right.

In the example shown in FIG. 5, first, the counting of the counter section 3 is started (80), and subsequently, the PSI insertion permission time (81) is reached. The PSI insertion time 1 (83) corresponds to the reception TS during the PSI insertion permission time.
When the packet reaches a certain amount, the PSI-T
This indicates that the S packet has been inserted. Also,
The counter reset (85) indicates that the counter has been reset after the insertion of the PSI-TS packet (83).

Subsequently, the PSI insertion permission time (81) is returned again.
And the received TS packet did not reach a certain amount, indicating that the PSI forced insertion time (82) has been reached. PSI insertion time 2 (84) is P
This indicates that the PSI-TS packet was forcibly inserted by the PSI forced insertion instruction because the received TS packet did not reach a certain amount during the SI insertion permission time. The counter reset (88) is based on the PSI-T
This indicates that the counter was reset after the S packet was forcibly inserted (84).

According to a modification of the first embodiment of the present invention, when a received TS packet reaches a certain amount while PSI insertion is permitted, a PSI-TS packet is
Of the receiving TS while the PSI insertion is permitted.
If the packet does not reach a certain amount, the PSI
The counter unit 3 is reset by inserting the PSI-TS packet at the forced insertion timing. That is, the counter unit 3 sets the PSI-T
Since the counter is reset after the S packet is inserted, the interval between the counter reset interval 1 (86) and the counter reset interval 2 (87) is different.

In the modification of the first embodiment of the present invention, since the counter is reset as described above, the effect that the minimum interval and the maximum interval of the PSI insertion interval can be defined is provided. Obtainable.

The above-described modification of the first embodiment of the present invention is a modification of the control of the PSI insertion control unit 2,
-Although the counter of the counter unit 3 is reset after the insertion of the TS packet, the first embodiment of the present invention can modify the counter unit 3; The counter of the counter unit 3 can be reset at the same time.

FIG. 6 is a diagram for explaining the reset timing of the counter executed by the counter unit 3 according to a modification of the first embodiment of the present invention. Hereinafter, a modification of the counter unit 3 will be described with reference to FIG. Will be described. In the example shown in FIG. 6, the flow of time is set to the right.

In the example shown in FIG. 6, first, the counting of the counter section 3 is started (80), and subsequently, the PSI insertion permission time (81) is reached. The PSI insertion time (83) is determined by the fact that the amount of received TS packets has reached a certain amount during the PSI insertion permission time.
This indicates that the S packet has been inserted. PSI
The forced insertion time (82) indicates that the counter operates even after the PSI-TS packet is inserted, and has reached the PSI forced insertion time. The counter reset (85) is set to PSI
This indicates that the counter has been reset after reaching the reset time set by the user after the forced insertion time.

Subsequently, the PSI insertion permission time (81) is returned again.
, And the PSI forced insertion time (82) has been reached because the amount of received TS packets did not reach a certain amount. The PSI insertion time (84) is
This indicates that the PSI-TS packet was forcibly inserted by the PSI forced insertion instruction because the received TS packet amount did not become less than the certain amount during the PSI insertion permission time. The counter reset (88) is based on the PSI-T
After the S packet forcible insertion (84), the reset time set by the user has been reached, indicating that the counter has been reset. That is, in this modification, when the time set by the user reaches the time regardless of the PSI insertion time, the counter unit 3
Is reset, the counter reset interval 1
The interval between (86) and the counter reset interval 2 (87) is the same interval.

In the above-described modified example, the counter is reset as described above, so that P
An effect that SI data can be inserted evenly can be obtained.

Although the first embodiment of the present invention has been described as detecting the data amount of the received TS packet by a certain fixed value, the first embodiment of the present invention The detection of the amount can be modified to be monitored in one TS packet (188 bytes).

FIG. 7 is a diagram for explaining a method for monitoring the presence or absence of a received TS packet according to a modification of the first embodiment of the present invention. Hereinafter, referring to FIG. A modification in which the detection is monitored by one TS packet (188 bytes) will be described. The example shown in FIG.
The situation where the data amount in IFO1 is monitored by one TS packet is shown.

In FIG. 7, FIFO 1 receives one or a plurality of TSs (TS signals 20) and stores T
Holds the S packet 100. Also, FIFO1 is F
The amount of TS packet data in the FIFO1 is monitored by one TS packet. If there is one or more TS packets in the FIFO1, the presence of data is indicated, and if not, the absence of data is indicated. The information is transmitted to the control unit 2. The PSI insertion control unit 2 receives the received TS packet presence / absence signal 30, the PSI insertion permission signal 31, and the PSI forced insertion signal 32, and receives the received T
One of S packet, null TS packet and PSI-TS packet is selected. The operation after the selection of the output TS packet is the same as the operation described in the first embodiment of the present invention.

It should be noted that the detection of whether or not one or more TS packet data exists in the FIFO 1
Since the data is composed of 88 bytes, data is stored in the FIFO 1 in multiples of 188 bytes. Therefore, the detection may be performed based on whether the data is 188 bytes or less.

As described above, when the amount of data in the FIFO 1 is monitored by the size of one TS packet, when at least one TS packet exists as data in the FIFO 1, the TS packet is output. Therefore, an effect that a large amount of data does not remain in the FIFO 1 when the operation is stopped can be obtained.

Next, the holding format and insertion method of the PSI data according to the first embodiment of the present invention will be described.

FIG. 8 shows the PS in the PSI data storage 4.
FIG. 9 is a diagram for explaining the management of the I data, and FIG. 9 is a diagram for more specifically explaining the management of the PSI data in the PSI data storage unit 4. Referring to FIG. 8 and FIG. And an insertion method will be described.

PSI memory 4 for holding PSI data
Is configured using, for example, a Dual Port RAM, and an input PSI data signal 53
And outputs the output PSI-TS packet signal 23. The PSI data holding format shown in FIG.
The PSI data that is currently inserted (PSI data A side) and the PSI changed due to the change in the received TS
P of two surfaces with the surface that holds data (PSI data B surface)
PSI data having an SI data holding area and held on the insertion surface of the PSI data A surface is output, and new PSI data changed during that time is updated on the update surface of the PSI data B surface.

When the update of the new PSI data is completed on the update surface of the PSI data B surface, the update surface is changed to a new insertion surface as shown in FIG.
Insertion of PSI data is performed with the SI data B side as the insertion plane. At this time, the PSI data A surface shown in FIG. 8B is changed to a new update surface, and becomes a surface on which the updated PSI data is updated during the insertion of the PSI data by the PSI data B surface.

As described above, by managing the PSI data using two areas of the insertion plane and the update plane, it is possible to update new PSI data even during the insertion of the PSI data. Can be obtained. By the way, when PSI is inserted using the same one of the insertion plane and the update plane, new PSI data changed during PSI data insertion cannot be updated.

Next, in the above description, the PSI data includes a program association table (hereinafter referred to as PAT) and n program correspondence tables (hereinafter referred to as PMT).
The PSI data holding format and the PSI insertion method will be specifically described with reference to FIG.

FIG. 9 shows the PSI memory 4 described with reference to FIG.
5 shows the PSI data storage format on the insertion plane or the update plane of FIG. In FIG. 9, 120 is PA
T data, 121 to 124 are respective data of PMT (1) to PMT (n), 110 is an insertion index for PAT, 111 to 114
Is an insertion index for PMT (1) to PMT (n), 115 is PM
This is an insertion index for indicating that there is no PSI data next to T (n).

PAT and PMT (1) to PSI memory 4
When accumulating PMT (n), for example, 1-byte insertion index data is added to the head of each of PAT and PMT (1) to PMT (n), and as shown in FIG. ) Are sequentially accumulated as PSI data. At the end of the PSI data, an insertion indicator 115 for indicating that the PSI data does not follow is added. For example, 1-byte data as an insertion index is written with “1” when data [PAT or PMT (1) to PMT (n)] follows the insertion index, and with “0” when there is no data. .

As a result, PSI data can be inserted based on the value of the insertion index. That is,
For the insertion index, the insertion index before the PAT and PMT (1) to PMT (n) is checked, and if the value is “1”, data [PAT or PMT (1) to PMT (1) to PMT (1) to PMT (n)
(n)] is inserted, and if it is “0”, there is no data [PAT or PMT (1) to PMT (n)] after the insertion index, so that the insertion operation is not performed, and the process returns to the first insertion index 110 to start checking. Then, the PSI data [PAT and PMT (1)-
PMT (n)].

In the above description, it is assumed that the insertion index is 1 byte, the value of the insertion index is "1" when there is data after the insertion index, and is "0" when there is no data.
The value of the insertion index is arbitrary, and another value may be used.

As described above, by inserting PSI data based on the insertion index, an effect is obtained that the insertion operation can be performed without counting the presence or absence of PAT data and the number of PMTs.

In the above description, the insertion index is added to each of the PAT and PMT to indicate whether or not there is data after the insertion index. Can also be managed.

FIG. 10 is a diagram for explaining an example of managing the PSI data by providing a cyclic counter update index in the insertion index. Hereinafter, a method of updating the cyclic counter value will be described with reference to FIG. . In FIG.
24 is PSI data [PAT and PMT (1) to PMT
(n)] 110 to 115 are insertion indexes for PSI data,
130 is a PSI data presence / absence index, and 131 is a cyclic counter update index.

Insertion indexes 110 to 115 for PSI data
Is composed of a PSI data presence / absence index 130 and a cyclic counter update index 131. Here, for example, the PSI data presence / absence index 130 in the insertion indexes 110 to 115 is used.
It is assumed that a 1-bit area is used as an area of the cyclic counter, and 7 bits are used as an area of the cyclic counter update index 131 for updating the cyclic counter. The method of using the PSI data presence / absence indicator 130, which is a 1-bit indicator, is described in FIG.
This is the same as the case of the I data holding format and the PSI insertion method. When the PSI data presence indicator is “1”, the PSI data presence indicator is
When there is I data and the PSI data presence / absence index is “0”, it is determined that there is no PSI data after the PSI data presence / absence index and is used as an index for inserting PSI data.

The traveling counter update index 131 is, for example,
When the value is "1", the cyclic counter value for PAT is updated, when it is "2", the cyclic counter value of PMT (1) is updated, and when it is "n + 1", the cyclic counter value of PMT (n) is updated. Further, when "0" is set, the update of the cyclic counter is not performed, and the index is used as an index for updating the cyclic counter value of the PSI data.

As described above, by managing the PSI data by providing a cyclic counter update index in the insertion index, it is possible to insert PSI data based on the PSI data presence / absence index. The cyclic counter value can be updated based on the index for updating. As a result, it is possible to obtain an effect that PSI data can be inserted while the cyclic counter value is updated without counting the number of data of the PAT and PMT (1) to PMT (n).

FIG. 11 is a view showing a P mode according to the second embodiment of the present invention.
FIG. 12 is a block diagram illustrating the configuration of the SI insertion device, and FIG. 12 is a flowchart illustrating the control operation of the PSI insertion control unit of the PSI insertion device according to the second embodiment of the present invention. FIG.
1 are the same as those in FIG.

The PSI insertion apparatus according to the second embodiment of the present invention shown in FIG. 11 is configured to perform the reception TS packet, the null TS packet and the PS
It selects and outputs one of the I-TS packets, and has basically the same configuration as that of the first embodiment shown in FIG. The difference from the first embodiment is that the reception TS
The control is to select any of a received TS packet, a null TS packet, and a PSI-TS packet as output data based on the data amount of the packet and the PSI insertion timing instruction, and other processing operations are performed in the first embodiment. Is the same as Hereinafter, the points different from the first embodiment will be mainly described.

In FIG. 11, the input means 7 first sets P
The PSI data is stored in the SI memory 4. The input unit 7 sets the PSI insertion timing time in the counter unit 3 using the signal line 50. The FIFO 1 receives the TS signal 20 and outputs the TS packet signal 21 to the selector 6 according to the output control signal 40 from the PSI insertion control unit 2. Further, the FIFO 1 transmits to the PSI insertion control unit 2 as a data amount signal 30 whether or not the received TS packet data has a certain amount or more. The synchronization signal generator 8 has a counter inside and transmits a synchronization signal 44 for outputting a TS packet to the PSI insertion controller 2 for every 188 bytes, which is the data length of the TS packet. The synchronization signal generator 8 transmits the counter value for each byte to the PSI insertion controller 2 as a byte counter value signal 45.

The counter section 3 sets the PS time based on the PSI insertion timing set by the input means 7.
When the I insertion timing time is reached, a PSI insertion timing signal 34 is transmitted to the PSI insertion control unit 2. The PSI insertion control unit 2 receives the received TS packet, the null TS packet, and the PSI insertion signal for each synchronization signal 44 on the condition of the data amount signal 30 of the received TS packet and the PSI insertion timing signal 34.
One of the SI-TS packets is selected and output. The operation after the selection of the output data is the same as that of the first embodiment.

Next, the data amount of the received TS packet, PS
The operation of the PSI insertion control unit 2 for selecting any one of the received TS packet, the null TS packet, and the PSI-TS packet based on the I insertion timing will be described with reference to the flow shown in FIG.

(1) When the PSI insertion device shown in FIG. 11 is started, processing starts in accordance with a synchronization signal for outputting TS packet data. Is determined (steps 60 and 63).

(2) If the number of the received TS packets is equal to or more than a predetermined amount in step 63, the received TS packets are output, the process returns to step 60, and the process is started from the start according to the synchronization signal (step 64).

(3) If it is determined in step 63 that there is no received TS packet or that there is not more than a certain amount, it is determined whether or not the PSI insertion timing has been reached. If P
An SI-TS packet is inserted, the process returns to step 60, and the process starts from the start according to the synchronization signal (steps 65 and 62).

(4) If it is determined in step 65 that the PSI insertion timing has not been reached, a null TS packet is inserted, the process returns to step 60, and the process starts from the start according to the synchronization signal (step 67).

That is, the PSI insertion control unit 2 according to the above-described second embodiment of the present invention transmits the PSI-TS packet if the received TS packet has a data amount of less than a certain amount and the PSI insertion timing time has been reached. Insert and PS
If the I-insertion timing has not been reached, a null TS is inserted. Also, the PSI insertion control unit 2
Even if the PSI insertion timing time has been reached, if the received TS packet is more than a certain amount, the output of the received TS packet is always continued. When the received TS packet becomes less than the certain amount, the PSI-TS It is working to insert packets.

According to the above-described second embodiment of the present invention, based on the data amount of the received TS packet and the PSI insertion timing, the received TS packet is smaller than a certain amount and the PSI-insertion timing is included in the PSI insertion timing. Since the TS packet is inserted, it is possible to obtain an effect that it is possible to reduce the jitter generated in the received TS packet when the PSI-TS packet is inserted.

FIG. 13 shows P according to the third embodiment of the present invention.
FIG. 14 is a block diagram illustrating the configuration of the SI insertion device, and FIG. 14 is a flowchart illustrating the control operation of the PSI insertion control unit of the PSI insertion device according to the third embodiment of the present invention. FIG.
In 3, reference numeral 12 denotes a PCR detection unit, and other symbols are the same as those in FIG.

The PSI insertion device according to the third embodiment of the present invention shown in FIG. 13 includes the presence / absence of a received TS packet, whether or not the received TS packet contains PCR data, a PSI forced insertion instruction and a PSI insertion permission instruction. Based on the receiving T
This is an embodiment in which any one of an S packet, a null TS packet, and a PSI-TS packet is selected and output. The points different from the first embodiment described above are the presence / absence of a received TS packet, whether or not the received TS packet contains PCR data, data for output based on a PSI forced insertion instruction and a PSI insertion permission instruction. The control is to select any one of a received TS packet, a null TS packet, and a PSI-TS packet, and the other processing operations are the same as those in the first embodiment. In the third embodiment of the present invention shown in FIG. 13, a PCR detection unit 12 is provided after the FIFO 1, and the PCR detection unit 12 and the PSI insertion control unit 2
Are different from the first embodiment of the present invention in the point that they are connected. Hereinafter, the points different from the first embodiment will be mainly described.

In FIG. 13, the input means 7 first sets P
The PSI data is stored in the SI memory 4. The input unit 7 sets the PSI insertion permission time and the PSI forced insertion time in the counter unit 3 using the signal line 50. FIF
O1 receives the TS packet signal 20 and transmits the presence or absence of the received TS packet data to the PCR detection unit 12 as a data amount signal 35. When the PCR detector 12 receives the data amount signal 35 from the FIFO 1 and recognizes that there is a received TS packet in the FIFO 1, the PCR detector 12 transmits a read signal 46 to the FIFO 1. FIFO1 has a read signal 46
And outputs only one TS packet to the PCR detection unit 12 among the received TS packets.

The PCR detector 12 receives the received TS packet signal 25 output from the FIFO 1. Also, P
The CR detection unit 12 determines whether PCR data exists in the received TS packet, and sends the received T packet to the PSI insertion control unit 2.
The presence / absence of the S packet is transmitted to the PSI insertion control unit 2 as the data amount signal 36, and the presence / absence of the PCR data in the received TS packet as the PCR flag signal 37 to the PSI insertion control unit 2. The synchronization signal generator 8 has a counter inside and transmits a synchronization signal 44 for outputting a TS packet to the PSI insertion controller 2 for every 188 bytes, which is the data length of the TS packet. The synchronization signal generator 8 transmits the counter value for each byte to the PSI insertion controller 2 as a byte counter value signal 45.

When the PSI insertion permission time is reached, the counter section 3 transmits a PSI insertion permission signal 31 to the PSI insertion control section 2 based on the setting of the PSI insertion permission time and the PSI forced insertion time set by the input means 7. And PSI
When the forced insertion time is reached, the PSI forced insertion signal 32 is
This is transmitted to the I insertion control unit 2. The PSI insertion control unit 2 includes a reception TS packet presence / absence signal 36, a PCR flag signal 3
7, on condition that the PSI insertion permission signal 31 and the PSI forced insertion signal 32 are used, as output data, the reception TS packet, the null TS packet and the P
Select one of the SI-TS packets. The processing operation after the selection of the output data is the same as that of the first embodiment.

Next, based on the presence or absence of the received TS packet in the PCR detecting section, whether or not the received TS packet contains PCR data, and the PSI forced insertion instruction and the PSI insertion permission instruction, the PCR detection is performed as the final output TS packet data. Internal TS packet, null TS packet and PS
The operation of the PSI insertion control unit 2 for selecting one of the I-TS packets will be described with reference to the flow shown in FIG.

(1) When the PSI insertion device shown in FIG. 13 is started, processing starts in accordance with a synchronization signal for outputting TS packet data, and first, the presence or absence of a received TS packet in the PCR detector is detected. If there is a received TS packet, it is determined whether the received TS packet contains PCR data (steps 60, 63, 6).
8).

(2) If it is determined in step 68 that the received TS packet contains PCR data, it is then determined whether or not the PSI forced insertion time has been reached. A given TS packet is output first, and the PSI-T
The S packet is inserted, and the process returns to the step 60 to start the process from the start according to the synchronization signal (steps 61, 64, 62).

(3) If it is determined in step 61 that the time is not the forced insertion time, a TS packet containing the received PCR data is output, and the process returns to step 60 to execute the process from the start according to the synchronization signal. Start (step 64).

(4) In the judgment of step 68, the PCR
When it is determined that there is no data, it is determined whether or not the PSI forced insertion time has been reached. If the PSI forced insertion time has been reached, a PSI-TS packet is inserted, and the process returns to step S60. Processing from the start is started according to the synchronization signal (steps 61 and 62).

(5) If it is determined in step 61 that it is not the PSI forced insertion time, the received TS packet is output, and the process returns to step 60 to start the process from the start according to the synchronization signal (step 64). ).

(6) The reception T
If it is determined that there is no S, it is determined whether or not it is the PSI insertion permission time, and if it is the PSI insertion permission time, a PSI-TS packet is inserted, and step 60 is performed.
Then, the processing from the start is started according to the synchronization signal (steps 66 and 62).

(7) If it is determined in step 66 that the PSI insertion permission time has not elapsed, a null TS packet is inserted, the process returns to step 60, and the process from the start is started according to the synchronization signal (step 66). 67).

As described above, the PSI insertion device according to the third embodiment of the present invention, when there is a received TS packet and the received TS packet contains PCR data, It operates so as to output the highest priority and then insert a PSI-TS packet. If no PCR data is included, PSI
If it is a forced insertion time, a PSI-TS packet is inserted,
If it is not the PSI forced insertion time, the operation is performed so as to output the received TS packet. Furthermore, when there is no receiving TS,
If it is the PSI insertion permission time, it operates to insert a PSI-TS packet, and if it is not the PSI insertion permission time, it operates to insert a null TS packet.

According to the third embodiment of the present invention which performs the above-described operation, the presence or absence of a reception TS packet and the reception T
If the received TS packet contains PCR data based on the PSI forced insertion instruction and the PSI insertion permission instruction, whether or not the S packet contains PCR data, the received TS packet is output with the highest priority, and then the PSI is output. Since the insertion of the TS packet is performed, the jitter generated in the received TS packet including the PCR data when the PSI-TS packet is inserted can be reduced with the highest priority.

[0105]

As described above, the PS according to the present invention can be used.
According to the I insertion method and the PSI insertion device, the following effects can be obtained.

(1) Since the PSI-TS packet is inserted by detecting the data amount of the received TS packet, the P
It is possible to obtain an effect that it is possible to reduce the jitter generated in the received TS packet when inserting the SI-TS packet.

(2) Not only the presence / absence of a received TS packet, but also whether or not the received TS packet contains PCR data is monitored, and the TS packet containing the PCR data is output with the highest priority and the PSI-TS packet is output. Because it inserts, P
It is possible to obtain the effect that the jitter occurring in the TS packet including the PCR data when the SI-TS packet is inserted can be reduced with the highest priority.

(3) The counter can be reset after the PSI data is inserted.
The effect that the minimum interval and the maximum interval of the I insertion interval can be defined can be obtained.

(4) The counter can be reset in accordance with the interval specified by the user, thereby obtaining an effect that the PSI data can be inserted evenly on a time average basis.

(5) By monitoring the amount of received TS packets with one TS packet, it is possible to obtain an effect that a large amount of data does not remain in the FIFO when the operation of the PSI insertion device according to the present invention is stopped. it can.

(6) The PSI data is managed by using the two-sided memory of the insertion surface and the update surface to insert the PSI data, so that the new PSI data is inserted even during the insertion of the PSI data.
An effect that data can be updated can be obtained.

(7) P based on PSI data insertion index
Since it is possible to insert the SI data, it is possible to obtain an effect that the PSI data insertion operation can be performed without counting the presence or absence of the PAT data and the number of PMTs.

(8) The cyclic counter can be updated based on the index for updating the cyclic counter, whereby the number of data of the PAT and PMT (1) to PMT (n) can be counted. It is possible to obtain the effect that it is possible to change the cyclic counter value without any change.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a PSI insertion device according to a first embodiment of the present invention.

FIG. 2 is a flowchart illustrating a control operation of a PSI insertion control unit of the PSI insertion device according to the first embodiment of the present invention.

FIG. 3 is a diagram illustrating a relationship between a PSI insertion permission time and a PSI forced insertion time, and a PSI insertion timing.

FIG. 4 shows a PSI according to a modification of the first embodiment of the present invention.
5 is a flowchart illustrating a control operation of a PSI insertion control unit of the insertion device.

FIG. 5 is a diagram illustrating reset timing executed by a counter unit.

FIG. 6 is a diagram illustrating reset timing of a counter executed by a counter unit according to a modification of the first embodiment of the present invention.

FIG. 7 shows a reception T according to a modification of the first embodiment of the present invention.
FIG. 4 is a diagram illustrating a method for monitoring the presence or absence of an S packet.

FIG. 8 is a diagram illustrating management of PSI data in a PSI data storage unit.

FIG. 9 is a diagram for more specifically describing management of PSI data in a PSI data storage unit.

FIG. 10 is a diagram illustrating an example in which a cyclic counter update index is provided in an insertion index to manage PSI data.

FIG. 11 is a block diagram showing a configuration of a PSI insertion device according to a second embodiment of the present invention.

FIG. 12 is a flowchart illustrating a control operation of a PSI insertion control unit of the PSI insertion device according to the second embodiment of the present invention.

FIG. 13 is a block diagram showing a configuration of a PSI insertion device according to a third embodiment of the present invention.

FIG. 14 is a flowchart illustrating a control operation of a PSI insertion control unit of the PSI insertion device according to the third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 FIFO 2 PSI insertion control part 3 Counter part 4 Memory 5 Null packet insertion part 6 Selector 7 Input means 8 Synchronization signal generation part 12 PCR detection part

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Nobuyoshi Torii 216 Totsuka-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture, Hitachi, Ltd.

Claims (12)

[Claims] 1. A method for receiving one or a plurality of transport streams (hereinafter, referred to as TS) and storing program specification information (hereinafter, referred to as TS) in the received TS according to a synchronization signal.
In a program specification information insertion method of inserting a TS packet (called PSI), the amount of received TS packets is monitored,
If the received TS packet has a certain amount or more, it outputs the received TS packet. If the received TS packet is less than a certain amount and it is time to insert a PSI, a PSI-TS packet is inserted. A PSI insertion method characterized by inserting a null TS packet when a certain amount is less than a certain amount and it is not a timing to insert a PSI. 2. A PSI insertion method for receiving one or a plurality of TSs and inserting PSI-TS packets into the received TSs according to a synchronization signal, wherein the amount of received TS packets is monitored, and the number of received TS packets is fixed. More than the amount and when it is time to forcibly insert the PSI,
When a PSI-TS packet is inserted and the received TS packet exists in a certain amount or more and it is not the timing to forcibly insert the PSI, the received TS packet is output and the received T packet is output.
If the S packets are less than a certain amount and the PSI insertion is permitted, a PSI-TS packet is inserted. If the received TS packets are less than a certain amount and the PSI insertion is not permitted, a null TS packet is inserted. A PSI insertion method characterized by inserting. 3. A PSI insertion method for receiving one or a plurality of TSs and inserting a PSI-TS packet into the received TS according to a synchronization signal, wherein the presence or absence of a received TS packet and the reception TS packet It monitors whether or not reference value (hereinafter, referred to as PCR) data is included. If a received TS packet exists, the received TS packet is a TS packet including PCR data, and the PSI
Is the timing to forcibly insert a TS packet containing the PCR data with the current synchronization signal, and insert a PSI-TS packet with the next synchronization signal. If the packet is a TS packet containing PCR data and it is not the timing to forcibly insert the PSI, the received TS packet is output, and there is a received TS packet and the received TS packet is a TS packet containing no PCR data. And PSI
If it is time to forcibly insert the PSI-T
If an S packet is inserted and there is a received TS packet and the received TS packet is a TS packet that does not include PCR data and it is not the timing to forcibly insert the PSI, the received TS packet is output and the received TS packet is If there is no PSI and the PSI insertion is permitted, the PSI-T
S packet is inserted and there is no received TS packet and PS
A PSI insertion method, wherein a null TS packet is inserted when the I insertion is not permitted. 4. A PSI insertion device for receiving one or a plurality of TSs and inserting a PSI-TS packet into the received TS, means for receiving the TS, holding the received TS packet, and determining an amount of the received TS packet. Means for monitoring, means for holding null TS packet data, means for holding PSI data, means for instructing PSI insertion timing, means for generating a synchronization signal for outputting a TS packet, Means for indicating a period for outputting, a received TS packet as data to be output based on the amount of the received TS packet and the PSI insertion timing instruction,
Means for selecting either a null TS packet or a PSI-TS packet, means for outputting the selected TS packet data, means for updating the PSI insertion timing,
Means for updating the SI data. 5. A PSI insertion device for receiving one or a plurality of TSs and inserting a PSI-TS packet into the received TS, means for receiving the TS, holding the received TS packet, and determining an amount of the received TS packet. Means for monitoring, means for holding null TS packet data, means for holding PSI data, means for instructing forced insertion of PSI,
Means for instructing SI insertion permission, means for generating a synchronization signal for outputting a TS packet, means for indicating a period for outputting a TS packet, amount of received TS packets, PSI forced insertion instruction, and PSI insertion Received TS packet, null TS as data to be output based on the permission instruction
Means for selecting one of a packet and a PSI-TS packet, means for outputting the selected TS packet data, means for updating the PSI forced insertion time, means for updating the PSI insertion permission time, and updating the PSI data A PSI insertion device comprising: 6. A PSI insertion device for receiving one or a plurality of TSs and inserting a PSI-TS packet into the received TS, means for receiving the TS, and holding the received TS packet to determine whether or not the received TS packet exists. Means for monitoring, means for monitoring whether the received TS packet is a TS packet containing PCR data, means for holding null TS packet data, means for holding PSI data, means for instructing PSI forced insertion. , A means for instructing PSI insertion permission, a means for generating a synchronization signal for outputting a TS packet, a means for indicating a period for outputting a TS packet, the presence or absence of a received TS packet,
Whether to include CR data, PSI forced insertion instruction and PS
Receive data as data to be output based on the I insertion permission instruction
Means for selecting any one of an S packet, a null TS packet and a PSI-TS packet, means for outputting the selected TS packet data, means for updating the PSI forced insertion time, and means for updating the PSI insertion permission time , PSI
Means for updating the data.
SI insertion device. 7. A means for instructing PSI forced insertion,
Means for instructing PSI insertion permission include a time counter,
And a mechanism for resetting the time counter after the insertion of the PSI.
A PSI insertion device as described. 8. A means for instructing the PSI forced insertion,
7. The PSI insertion device according to claim 5, wherein the means for instructing PSI insertion permission includes a time counter and a mechanism for resetting the time counter at each time interval specified by the user. . 9. The receiving TS packet holding the received TS packet
7. The PSI insertion device according to claim 4, wherein the means for monitoring the data amount of the packet monitors the data amount of the TS packet at 188 bytes or less. 10. The means for holding the PSI data,
The PSI data holding format has two PSI data: an area as an insertion plane for holding PSI data being inserted and an area as an update plane for holding PSI data changed due to a change in the content of the received TS. A new PSI data that has a holding area and is changed while outputting the PSI data of the insertion plane is updated to an update plane, and after the update of the new PSI data is completed, the update plane is changed to a new insertion plane. 7. The PSI insertion device according to claim 4, further comprising a configuration for sequentially performing PSI data insertion. 11. A PSI insertion device for receiving one or a plurality of TSs and inserting a PSI-TS packet into the received TS, wherein the PSI data is inserted in a TS packet format as the PSI data insertion format. PSI data is held in a format with an index indicating whether or not to insert PSI data for each packet, and PSI is stored based on the insertion index.
A PSI insertion device for performing SI data insertion. 12. A PSI insertion apparatus for receiving one or a plurality of TSs and inserting a PSI-TS packet into the received TS, means for updating a cyclic counter of the TS packet at the time of inserting PSI data in a TS packet format. PSI data as TSI data insertion format
PSI in S packet format and for each TS packet
PS in a format with an index of whether to insert data or not
Holding the I data, inserting the PSI data based on the insertion index, further setting an index for updating the cyclic counter in the insertion index, and performing a cyclic operation on the PSI data based on the index for updating the cyclic counter. A PSI insertion device comprising means for updating a counter.