JP2001086088A - Information processor, its method and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase encoding rate by adding data to an information processor. SOLUTION: Pieces of input times (times t1, t2, t3, t4) of modules A, B, C which are arranged in a carousel are counted and differences between requested time t0 of data addition are calculated respectively. The module from which the closest calculated result to time of 1/2 of a cycle of the carousel is obtained is detected among the modules, and the detected module is added to a position corresponding to the requested time t0. Thus, the encoding rate is increased.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information processing apparatus and method, and a recording medium, and more particularly, to an information processing apparatus and method capable of increasing a stream coding rate by adding data. And a recording medium.

[0002]

2. Description of the Related Art For example, in a digital multi-channel broadcasting system using satellites or terrestrial waves, various services by transmitting additional data such as an EPG (Electronic Program Guide), so-called data broadcasting services, are desired to be enhanced. ing.

[0003] The content of such a data broadcasting service is created in a predetermined description format so that the service is expressed in a receiver as intended by the content creator. For example, MHEG (Multimedia and Hyp
ermedia information codingExperts Group) is one of the description formats, and a content creator creates this content using an authoring tool of MHEG. As one of the systems for transmitting the content of such a data broadcasting service, DSM-CC (Digital S
A carousel transmission method of "torage Media Command and Control" (digital storage media-command and control) has been proposed, and MPEG (Moving Picture) has been proposed.
Experts Group) 2-6 (ISO / IEC 18138-
6) is standardized.

FIG. 1 shows an example of the configuration of a conventional multiplexing apparatus 10 using statistical multiplexing.

[0005] Variable rate coding units 11-1 to 11-N
(Hereinafter, when it is not necessary to individually discriminate the signals, the signals S1 to SN are respectively input to the variable rate encoding unit 11. The same applies to other devices.) The unit 11 encodes the input signal S at a variable rate and outputs the encoded signal S to the multiplexing unit 12. The multiplexing unit 12 statistically multiplexes the coded signal S input from each of the variable rate coding units 11 and outputs the multiplexed signal S to an external device.

[0006] The multiplexing unit 12 also allocates a band in accordance with the coding rate that fluctuates with time according to the content of the signal input from each variable rate coding unit 11. If the sum of the coding rates from the unit 11 exceeds the limited transmission capacity of the multiplexed transmission path, a part of the input signal is deleted so that the sum does not exceed the transmission capacity ( Discard) process.

FIG. 2 shows a configuration example of another conventional multiplexer 20. As shown in FIG. The multiplexing apparatus further includes a DSM-CC data encoding unit 21 in the multiplexing apparatus 10 of FIG.

[0008] The DSM-CC data encoding unit 21 includes, for example,
The data D of the content of the data broadcasting service created using the authoring tool of MHEG is input. DS
The M-CC data encoding unit 21 converts the input data D into DS
After encoding based on the M-CC standard, the data is converted into a section format, which is one of the transmission formats of MPEG2, and is converted into a transport stream. The transport stream (hereinafter, abbreviated as TS) is placed on a carousel. The data is expanded and output to the multiplexing unit 12.

Next, the operation of the DSM-CC data encoding unit 21 will be described.
Will be described.
The data D has, for example, a directory structure as shown in FIG. In the case of FIG. 3, the data D is
A root directory RD corresponding to one broadcasting program is provided, to which sub directories SD1 and sub directories SD2 corresponding to, for example, each scene belong, and, for example, the sub directory SD1 corresponds to video data or audio data or the like. Has the directory structure to which the lowest-order files F1 to F3 belong. Note that the file F can also belong to the subdirectory SD or the root directory RD redundantly.

[0010] The DSM-CC data encoding unit 21 converts the content data D having such a directory structure into DSM-CC data.
After encoding according to CC, the section is formed.

Next, the section forming process will be described. First, as shown in FIG. 4A, one module (DSM-CC) associated with the file F in FIG.
(See FIG. 4) in which a unit for receiving data in the carousel transmission method of FIG.
(D) is divided into blocks B of a predetermined size so that the size of (D) does not exceed 4 KB (FIG. 4B). Note that only the last block Bk may be smaller than the size of the other blocks B.

Next, as shown in FIG. 4C, a DSM-CC header is added to each block B, and each block B is assigned a DDB (D
It is converted to a data structure called ownload Data Block). Finally, the section header and CRC (Cyclic
Redundancy Check Code) is added to form a section. This section is no larger than 4KB. In the following, a section storing the DDB structure is referred to as a DDB section.

In this manner, a DDB section is formed from each of a plurality of modules constituting one content data D. 5 shows DDB sections 1 to 3 (FIG. 5A) formed based on blocks B1 to B3 (FIG. 5A) divided from module 1 among a plurality of modules 1, 2,. 5
(B)) is shown.

Here, the detailed configuration of the DDB section is as follows.
This will be described with reference to FIG. As shown in FIG.
Table_ which is the first item (field) of C_section ()
"0x3C"("3C" in hexadecimal notation) for id (8 bits)
"60" in decimal) is written, and "0x" is added to the messageId of dsmccDownloadDataHeader () as shown in FIG.
If 1003 ”(2 bytes) is described, this DSMCC
The section is a DDB section.

In the DSMCC_section (), in addition to the table_id, a field as shown in FIG. 6A is provided with a storage capacity for the bits shown in the figure. For example, in dsmcc_section_length,
For example, table_id_extentio where moduleId is described
n, blockNumbe of Download_Data_Block () (Fig. 6 (B))
section_number in which the lower 8 bits of r are described, and last_section in which the last section number is described
The length of a portion including _number and the like (portion indicated by an up-down arrow in FIG. 6A) is described. This length is a maximum of 4093 (bytes). The sect of the first DDB section among the DDB sections that make up the module
“0x00” is described in the ion_number.

Download_Data_Block () shown in FIG.
Has a DDB structure as shown in FIG. DsmccDownloadDataHeader () which is the header at the head position
As shown in FIG. 6 (C), protocolDiscriminato
r, dsmccType, messageId ("0x1003"), downloadI
d, adaptationLength, messageLength, dsmccadaptati
Fields such as onHeader are provided with storage capacity for the bytes shown in the figure. For example,
The adaptationLength describes the length of dsmccadaptationHeader, and the messageLength describes the length from dsmccadaptationHeader to the end of blockData of Download_Data_Block ().

In the Download_Data_Block () of FIG. 6B, in addition to the dsmccDownloadDataHeader (), a field as shown in FIG. 6B is provided by allocating the storage capacity for the bytes shown in the figure. ing. For example, bl
The block number is described in ockNumber, and the lower 8 bits of this block number are assigned to the DSMCC_section () in FIG.
It is described in section_number.

In the DSM-CC data carousel system, in addition to the DDB section described above, a DII (Download Info Index)
cation) D with header and CRC added to structured data
Section II and DSI (Download Server Initiat
e) A DSI section in which a header and a CRC are added to the structured data is further formed. Note that DII and DSI describe control information necessary for correctly receiving the DDB section.

FIG. 7 shows the structure of the DII section. As shown in FIG. 7A, the table_of_DSMCC_section ()
“0x3B” is described in id (8 bits), and FIG.
MessageId of DsmccMessageHeader () as shown in (C)
If "0x1002" is described in this field, this DSMCC section is a DII section.

In the DSMCC_section (), in addition to the table_id, a field as shown in FIG. 7A is provided with a storage capacity for the bits shown in the figure. For example, table_id_extention has transaction_id
The lower 16 bits are described.

[0021] DownloadInfoIndication shown in FIG.
() Has a DII structure as shown in FIG. 7 (B).
In this DownloadInfoIndication (), dsmccMessageHead
er (), downloadId, blocksize, windowsize, ackPerio
d, tCDownloadWindow, tCDownloadSenario, compatib
ilityDescriptor (), numberOfModules, and each module (in this example, every M modules)
ModuleId, moduleSize, moduleVersion, moduleInfo
Length and moduleInfoByte fields are provided with storage capacity for the bytes shown in the figure. For example, blocksize is the block size, tCDownloadSenario is the carousel timeout value, and numberOfModules is the number of modules M
Is described, moduleSize for each module describes a module size, and moduleVersion describes a module version.

DsmccMessageHeader () shown in FIG. 7 (B)
As shown in FIG. 7C, each field is provided with a storage capacity of the bytes shown in the figure. For example, "0x1002" is described in the messageId.

When the contents have a directory structure as shown in FIG. 3, a plurality of DIIs corresponding to the sub directories SD are provided.

The structure of the DSI section is basically the same as that of the DDB section and the DII section.
"0x3B" is described in table_id of section (), and
"0x1006" is described in the messageId of dsmccMessageHeader ().

When the contents have a directory structure as shown in FIG. 3, a plurality of DIIs associated with the sub-directory SD are provided. In this case, the DSI contains information for linking to the DIIs. Is described.

Returning to FIG. 2, the DSM-CC data encoding unit 21
Is the DDB section, DII section,
And after forming the DSI sections, they are converted to TS as shown in FIG. 5 (C).

Next, the DSM-CC data encoding unit 21 affixes the converted TS to the surface of a virtual rotating body called a carousel as shown in FIG. ), The TS is output to the multiplexing unit 12 at a timing corresponding to the rotation of the carousel. In addition, this carousel is configured to rotate continuously, and this TS (TS constituting each section arranged on the carousel)
Are periodically output to the multiplexing unit 12.

Output from the DSM-CC data encoding unit 21
The TS is transmitted from the multiplexing unit 12 to the variable rate encoding unit 11
Are multiplexed together with the TS from the server and output to an external device.

The DSM-CC data encoding unit 21 operates as described above.

[0030]

The DSI section, DII section, and DDB section are shown in FIG.
As shown in (E), the signal is output to the multiplexing unit 12 at a timing corresponding to the rotation of the carousel. Usually, except for the case of updating a module or the like, according to a predetermined coding rate set in advance, Is output. That is, it is output at a constant rate.

Thus, even when the sum of the coding rates in the variable rate coding unit 11 and the DSM-CC data coding unit 21 does not reach the transmission capacity of the allocated band, for example, Sum of the conversion rates)
The data is transmitted at only the rate. As a result, there is a problem that the transmission band is not used efficiently.

The present invention has been made in view of such a situation, and is to make it possible to use a transmission band efficiently.

[0033]

According to the first aspect of the present invention, there is provided an information processing apparatus comprising: first determining means for determining a type of periodic data to be added to a stream; and a cycle of the type determined by the first determining means. Adding means for adding data to the stream.

The period data can be a section arranged in a carousel in the DSM-CC transmission system.

The section can be a DDB section.

The section can be a DII section or a DSI section.

The first determining means includes a first measuring means for measuring an input time of the cycle data, a second measuring means for measuring an input time of a command for adding the cycle data to the stream, and a first measuring means. The input time measured by the measuring means;
Calculating means for calculating the difference from the input time measured by the measuring means, and second determining means for determining the type of cycle data based on the difference calculated by the calculating means and the first cycle. Further, it can be provided.

[0038] Deletion means for deleting periodic data from the stream can be further provided.

According to a seventh aspect of the present invention, there is provided an information processing method comprising: a determining step of determining a type of periodic data to be added to a stream; and an adding step of adding periodic data of the type determined in the processing of the determining step to the stream. It is characterized by including.

According to the recording medium of the present invention, a determining step of determining the type of periodic data to be added to the stream and an adding step of adding periodic data of the type determined in the processing of the determining step to the stream are provided. It is characterized by including.

The information processing apparatus according to claim 1,
In the information processing method described in the item (2) and the recording medium described in the item (8), the type of periodic data to be added to the stream is determined, and the determined type of periodic data is added to the stream.

[0042]

FIG. 8 shows a configuration example of a multiplexing apparatus 100 to which the present invention is applied. This multiplexing device includes a DSM-CC data encoding unit 21 of the multiplexing device 20 shown in FIG.
And a multiplexing unit 12, a data adjustment unit 101 and a control unit 102 connected to the data adjustment unit 101 and the multiplexing unit 12 are provided. The other configuration is the same as that of FIG. 2, and the description thereof is omitted.

The data adjustment unit 101 includes a TS that forms a DII section, a DSI section, and a DDB section.
However, at the timing corresponding to the rotation of the carousel, DSM-CC
Input from the data encoding unit 21. Data adjustment unit 10
1 adds or deletes the DDB section to the input TS and outputs it to the multiplexing unit 12 according to a command from the control unit 102. As a result, the coding rate in the DSM-CC data coding unit 21 is increased or reduced.

The control unit 102 controls the multiplexing process of the multiplexing unit 12, as well as the sum of the TS coding rates output from the variable rate coding unit 11 and the data adjustment unit 101, and the assigned transmission capacity. And instructs the data adjustment unit 101 to add or delete a DDB section based on the monitoring result.

FIG. 9 shows an example of the configuration of the data adjustment unit 101. The TS from the DSM-CC data encoding unit 21 input to the data adjustment unit 101 is input to the analysis unit 111 and the switch 112 of the data adjustment unit 101.

The analysis unit 111 outputs the DI
A TS corresponding to the I section is extracted and analyzed, and for example, a module ID, the number of the modules present on one carousel (hereinafter, referred to as an occurrence frequency), and a carousel cycle are obtained. Of the input TSs, the input time of the TSs constituting the DDB section is measured, and a module table (FIGS. 15 and 16) described later is generated and output to the increasing unit 113 and the reducing unit 114.

The increasing unit 113 switches the switch 11 based on the module table input from the analyzing unit 111 and the like.
A predetermined module (DDB section) is added to the TS from the DSM-CC data coding unit 21 input via the switch 2 and output to the multiplexing unit 12 via the switch 115.

The reducing unit 114 switches the switch 11 based on the module table input from the analyzing unit 111 and the like.
From the TS input via the second module, a predetermined module (DDB
Section), and outputs the result to the multiplexing unit 12 via the switch 115.

The control unit 116 is connected to the control unit 102, receives a command from the control unit 102, and switches the switch 112, the increasing unit 113, the reducing unit 114,
And the switch 115 is controlled.

FIG. 10 shows a configuration example of the increasing unit 113. The buffer 121 receives the TS from the DSM-CC data encoding unit 21 that is input via the switch 112, and the buffer 121 temporarily stores the input TS and issues a command from the determination unit 122. At the timing based on
Output to the addition unit 123.

The determination unit 122 receives a module table from the analysis unit 111 and a data increase command from the control unit 116. The deciding unit 122 controls the control unit 11
6, the type of the module to be added is determined based on the input time of the command from the module 6, the module table from the analysis unit 111, and the determined module is read from the storage unit 124 and output to the addition unit 123. The output timing of the module is instructed to the buffer 121.

The adding unit 123 adds the module supplied from the determining unit 122 to the TS input from the buffer 121 at a predetermined timing, and outputs the TS to the multiplexing unit 12 via the switch 115.

The storage unit 124 stores in advance all of the modules input to the data adjustment unit 101 (all of the modules output from the multiplexer 100), and outputs the specified module to the determination unit 122. I do.

FIG. 11 shows an example of the configuration of the reduction unit 114. The deletion unit 131 of the reduction unit 114 includes the switch 11
2, the TS from the DSM-CC data encoding unit 21 is input. The deletion unit 131 deletes the module specified by the determination unit 132 from the input TS, and
5 to the multiplexing unit 12. The determination unit 132
When a data reduction command is input from the control unit 116,
The module to be deleted is determined based on the module table or the like supplied from the analysis unit 111, and the deletion unit 13
Notify 1.

Next, the operation of the data adjustment unit 101 will be described with reference to the flowchart of FIG. In the case of this example, one module A and two modules B (in the figure,
Although they are shown as modules B1 and B2, they are the same module B).
One module is input to the data adjustment unit 101 in the form of a TS (more precisely, each module is configured
In addition to the DDB section, the DII section and the DSI section are input to the data adjustment unit 101 in the form of TS.) In this example, the carousel rotates to the left, module A is input first, and then, at a timing corresponding to the cycle of the carousel, module B1, module C, and module B2 sequentially and periodically transmit data. It is input to the adjustment unit 101.

Since the DDB section is generated from blocks divided from each module as shown in FIG. 5D, one DDB section generated from the same module is placed on the carousel. One unit (group)
Are formed and arranged. That is, each module shown in FIG. 13 indicates a group of a plurality of DDB sections generated from each module.

In this example, DownloadInfoIndication () having the configuration shown in FIG. 14B is stored in the DII section instead of the configuration shown in FIG. 7B. In this DownloadInfoIndication (), moduleID, module_count, TP_count, and
A module_time field is provided, and predetermined 2-bit information is described. (Hereinafter, when it is not necessary to individually distinguish information described in these fields, they are collectively referred to as module information.) ). In this example, DownloadInfoIndication () includes module information A, B, and C.

The module_ID of the module information A contains the ID of the module A, and the module_count contains the module A
Occurrence frequency (the number existing on the carousel), that is, "1", the TP_count contains the number of TS packets constituting the module A, and the module_time contains
The cycle (time TA) of module A is described.

Module information B and module information C
In the same manner as the module information A, information on the module B and the module C are described, respectively.
For example, in the case of this example, two modules B are arranged in the carousel.
"2" is described in ount.

This DownloadInfoIndication () also includes
A carousel_time field is provided, in which a carousel cycle (time TW) is described. In addition,
The carousel cycle is determined by the amount of data on the carousel and the coding rate.

When the above-described TS is input from the DSM-CC encoding unit 21, in step S11, the analysis unit 111 of the data adjustment unit 101 extracts a DII section from the TS. Specifically, the analysis unit 111 determines the tab of the DSMCC_section () of the section configured by the input TS.
“0x3B” is described in le_id (FIG. 7 (B)), and Dsm
The DII section in which "0x1002" is described in the messageId of ccMessageHeader () (FIG. 7C) is detected and extracted.

Next, in step S12, the analysis unit 1
11 is the DownloadInf from the extracted DII section
Module information A to module information C described in oIndication (), and carousel cycle (time TW)
(FIG. 14B) is acquired. The analysis unit 111 supplies the obtained carousel cycle (time TW) to the increasing unit 113 and the reducing unit 114.

In step S13, the analyzing unit 111
Of the module information acquired in step S12
Module ID and module described in moduleId
Based on the occurrence frequency of the module described in _count, a table as shown in FIG. 15 (hereinafter, this table is referred to as a module table) is generated. In this example, since the occurrence frequency of the module B is “2”, two columns in which the ID of the module B is described are provided.

Next, in step S14, the analysis unit 1
Numeral 11 starts measuring the input time of the input DDB section, adds the measurement result to the module table of FIG. 15, and generates a module table shown in FIG. The module table in FIG.
The first input time of B (B1), B (B2), and C (time t1, t2, t4, t3) is shown. Analysis unit 11
1 supplies the generated module table (FIG. 16) to the increasing unit 113 and the reducing unit 114.

In the DDB section, DDB sections generated from the same module are arranged on the carousel so as to form one unit. So, here,
The first D in the DDB section that constitutes each module
The input time of the DB section (exactly, the input time of the TS constituting the first DDB section) is measured and described in the module table. The first DD of each module
Secti of DSMCC_section () of section B (Fig. 6 (A))
Since “0x00” is described in on_number, the analysis unit 111 detects the DDB module in which it is described and measures the input time.

In this case, since the carousel continuously rotates, the modules AB1, C, and B2 (FIG. 13) are periodically input to the data adjustment unit 101, but the analysis unit 111 , As each module is entered,
The input time is measured, overwritten in the column “input time” of the module table (FIG. 16), and supplied to the increasing unit 113 and the reducing unit 114. That is, the module table is
Every time a module is input, the column “input time” is updated and supplied to the increasing unit 113 and the reducing unit 114.

In step S15, control unit 116
Waits until an instruction to increase or delete data is input from the control unit 102, and when an instruction to increase data is issued, the process proceeds to step S16. The control unit 102 includes the variable rate encoding unit 11 and the DSM-CC data encoding unit 21
Monitoring the difference (difference) between the sum of the coding rates in the above and the allocated transmission capacity.
When the difference is equal to or larger than a predetermined value, a command to increase the data is output to the control unit 116 of the data adjustment unit 101.

In step S16, control unit 116
Notifies the increase unit 113 that the command to increase the data has been issued, and switches the switch 112 and the switch 11
5 and switches 112 and 115
As shown in FIG. 9, the TS is connected to the increasing unit 113, the TS from the DSM-CC data encoding unit 21 is input to the increasing unit 113, and the output of the increasing unit 113 is input to the multiplexing unit 12.

Next, in step S17, the increasing unit 1
13 starts the data increasing process. The details of this processing are shown in the flowchart of FIG.

In step S31, the determination unit 122 of the increase unit 113 determines the time t0 (hereinafter, referred to as a request time) when the data increase command is input from the control unit 116,
The difference from the input time of each module described in the column “input time” of the latest module table (FIG. 16) supplied from the analysis unit 111 is calculated.

In step S32, the decision unit 122
Is the analysis unit 111 among the calculation results in step S31.
The module which has calculated the calculation result closest to half the time of the carousel period TW (step S12 in FIG. 12) supplied from the control unit is detected. As shown in FIG. 18, the processing of steps S31 and S32 is performed by setting the input time t1 to 14:30 and the input time t2 to 14:40.
Minutes, input time t3 is 14:50, input time t4 is
15:00, the request time t0 is 15:10, and the carousel cycle (time TW) is 46 minutes as an example.

The difference between time t0 and time t1 is 40 minutes (=
15: 10-14: 30), the difference from time t2 is
30 minutes (= 15: 10-14: 40) at time t3
The difference is 20 minutes (= 15: 10-14: 50)
And the difference from time t4 is 10 minutes (= 15: 10-15: 00). Since the carousel cycle TW is 46 minutes in this example, the calculation result closest to 1/2 of the 23 minutes is 20 minutes, which is the difference from time t3.
That is, in the case of this example, the module C is detected.

Next, in step S33, the decision unit 1
22 reads out the DDB section constituting the module C detected in step S32 from the storage unit 124, and supplies it to the adding unit 123. In step S34, the determination unit 122 controls the buffer 121 and
Is added to the position on the carousel corresponding to the request time t0, as shown in FIG.
23.

In step S35, the adding unit 123
Is determined by the decision unit 122
As shown in FIG. 19, the DDB section that constitutes the module C supplied from is added to the position corresponding to the request time t0. That is, the module C is added to a position farthest from the position of the module C which is arranged in advance (a position on the diagonal of the carousel).

Thus, the added module C is
By arranging the module C at a position farther away from the module C which is arranged in advance, the module C is periodically output to the multiplexing unit 12 in the order of module A, module B1, module C, module B2, and module C. . That is,
Module C is output at shorter intervals and received at the receiver at shorter intervals. Normally, there are multiple sections on the carousel that it is desirable to be able to receive with a short waiting time when receiving, such as a DII section containing module information and a DDB section containing the first scene when receiving a data broadcasting service, and They are arranged on the carousel as far away from each other as possible.

When the DDB section has been added as described above, the process ends, and the process returns to step S15 in FIG. 12, and waits until the next command is input. Thus, the variable rate encoding unit 11 and the DSM-CC data encoding unit 2
If the sum of the coding rates in 1 does not reach the allocated transmission capacity, data (DDB section in this example) is added to increase the coding rate, so that the band is efficiently used. Used. Further, since the added module is arranged at a position as far as possible from the module arranged in advance, the module is output at a short interval. As a result, the waiting time of the user can be reduced.

In step S15, when a command to delete data is input from control unit 102, step S15
Proceed to 18. The control unit 102 monitors the difference between the sum of the coding rates of the variable rate coding unit 11 and the DSM-CC data coding unit 21 and the assigned transmission capacity. When the value becomes equal to or less than the above (for example, when the sum of the coding rates exceeds the transmission capacity), a command to delete data is output to the control unit 116 of the data adjustment unit 101.

In step S18, control unit 116
Notifies the reduction unit 114 that data deletion has been instructed, and switches 112 and S11.
5 and switches 112 and 115
The reduction unit 114 is connected to the reduction unit 114, and the TS from the DSM-CC data encoding unit 21 is input to the reduction unit 114.
Is input to the multiplexing unit 12.

Next, in step S19, the reducing unit 1
14 deletes a predetermined DDB section from the TS input from the DSM-CC data encoding unit 21. Specifically, the determination unit 132 of the reduction unit 114 detects a module (for example, module B) having an occurrence frequency of 2 or more with reference to the module table supplied from the analysis unit 111, and sets the deletion unit 131 to Control the detected module,
Delete from the input TS. The TS from which the predetermined module has been deleted is output to the multiplexing unit 12 via the switch 115.

Thereafter, the flow returns to step S15, and waits until the next command is input. As described above, when the sum of the coding rates in the variable rate coding unit 11 and the DSM-CC data coding unit 21 exceeds the allocated transmission capacity, the module whose occurrence frequency is 2 or more is deleted. Thus, since the coding rate is reduced, for example, it is possible to prevent a module having an occurrence frequency of one from being deleted and no service corresponding to the module from being provided.

In the above description, as shown in FIG. 8, the case where there is one DSM-CC data encoding unit 21 has been described as an example. However, as shown in FIG. Even if a plurality of 21s are provided, the DSM-
By providing the data adjustment unit 101 corresponding to the CC data encoding unit 21, the data adjustment as described above is performed. In this case, the control unit 102 controls the plurality of data adjustment units 101.

In the above description, the case where a DDB section is added or deleted has been described as an example.
You can also add or delete sections or DII sections.

In the above description, the case where the module information is obtained from the DII section having the configuration shown in FIG. 14 has been described as an example, but the module information is obtained from the DDI section having the configuration shown in FIG. hand,
It can also be used in the present invention. A method for acquiring module information from the DDI section having the configuration shown in FIG. 7 is disclosed in Japanese Patent Application No. Hei 11-051862.

The above series of processing can be executed by hardware, but can also be executed by software. A multiplexing device that executes a series of processes by software will be described.

The multiplexing device 501 shown in FIG. 21 is composed of, for example, a computer. CPU (Central Processing Uni
t) 511 is connected to an input / output interface 516 via a bus 515, and the CPU 511 sends a keyboard,
When a command is input from an input unit 518 composed of a mouse or the like, for example, a magnetic disk 531, an optical disk 532, a magneto-optical disk 533, or a semiconductor memory mounted on a ROM (Read Only Memory) 512, a hard disk 514, or a drive 520. The program stored in a recording medium such as 534 is stored in a random access memory (RAM).
ory) 513 and executed. Further, the CPU 511
Indicates the processing result, for example, in the input / output interface 5
Via a display 16, the data is output as necessary to a display unit 517 such as an LCD (Liquid Crystal Display). The program is stored in the hard disk 514 or the ROM 512 in advance and provided to the user integrally with the multiplexer 501, or as a package medium such as the magnetic disk 531, the optical disk 532, the magneto-optical disk 533, and the semiconductor memory 534. It can be provided to the hard disk 514 via a communication unit 519 from a satellite, a network, or the like.

In the present specification, the steps of describing the program provided by the recording medium may be performed not only in chronological order but also in chronological order according to the described order. This also includes processing executed in parallel or individually.

In the present specification, the term “system” means an entire device including a plurality of devices, means, and the like.

[0088]

According to the information processing apparatus described in claim 1, the information processing method described in claim 7, and the recording medium described in claim 8, the periodic data is added to the stream. For example, the transmission band can be used efficiently.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration example of a conventional multiplexer 10;

FIG. 2 is a block diagram showing a configuration example of a conventional multiplexer 20.

FIG. 3 is a diagram illustrating a directory structure of content.

FIG. 4 is a diagram illustrating a section structure.

FIG. 5 is a diagram illustrating a carousel transmission method.

FIG. 6 is a diagram illustrating a configuration of a DDB section.

FIG. 7 is a diagram illustrating a configuration of a DII section.

FIG. 8 is a block diagram illustrating a configuration example of a multiplexing device 100 to which the present invention has been applied.

9 is a block diagram illustrating a configuration example of a data adjustment unit 101 in FIG.

10 is a block diagram illustrating a configuration example of an increasing unit 113 in FIG.

11 is a block diagram illustrating a configuration example of a reduction unit 114 in FIG.

FIG. 12 is a flowchart illustrating an operation of the data adjustment unit 101.

FIG. 13 is a diagram for explaining data addition processing.

FIG. 14 is another diagram illustrating the configuration of a DII section.

FIG. 15 is a diagram illustrating a module table.

FIG. 16 is another diagram illustrating the module table.

FIG. 17 is a flowchart illustrating a data increasing process.

FIG. 18 is another diagram illustrating the data increasing process.

FIG. 19 is another diagram illustrating the data increasing process.

FIG. 20 is a block diagram showing another configuration example of the multiplexer 100 to which the present invention is applied.

FIG. 21 is a block diagram illustrating a configuration example of a multiplexing device 501.

[Explanation of symbols]

101 data adjustment unit, 102 control unit, 111
Analysis unit, 112 switch, 113 increase unit, 1
14 reduction unit, 115 switch, 116 control unit,
121 buffer, 122 determination unit, 123 addition unit, 124 storage unit, 131 deletion unit, 132
Decision section

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04N 7/24 (72) Inventor Tetsuo Sumida 6-7-35 Kita Shinagawa, Shinagawa-ku, Tokyo Sony Corporation F term (reference) 5C059 KK10 KK34 MA00 SS06 SS11 UA39 5C063 AB03 AB07 DA07 DA13 5K028 AA11 BB05 BB06 CC06 DD07 EE03 EE07 KK01 KK12 LL13 TT05 5K030 GA03 HB21 HC01 HC14 JA01 JL02 9L04 CC06 DD06

Claims (8)

[Claims] 1. An information processing apparatus for statistically multiplexing a variable-rate-encoded stream, which constitutes cycle data transmitted in a second cycle corresponding to a first cycle, wherein the cycle data to be added to the stream. An information processing apparatus, comprising: a first determining unit that determines a type of the periodic data; and an adding unit that adds the periodic data of the type determined by the first determining unit to the stream. 2. The information processing apparatus according to claim 1, wherein the periodic data is a section arranged in a carousel in a DSM-CC transmission scheme. 3. The information processing apparatus according to claim 2, wherein the section is a DDB section. 4. The information processing apparatus according to claim 2, wherein the section is a DII section or a DSI section. 5. The first determination unit includes: a first measurement unit that measures an input time of the cycle data; and a second measurement unit that measures an input time of a command to add the cycle data to the stream. And the input time measured by the first measuring means;
Calculating means for calculating a difference from the input time measured by the second measuring means; and calculating the type of the cycle data based on the difference calculated by the calculating means and the first cycle. The information processing apparatus according to claim 1, further comprising: a second determination unit configured to determine. 6. The information processing apparatus according to claim 1, further comprising a deletion unit configured to delete the periodic data from the stream. 7. An information processing method for an information processing apparatus for statistically multiplexing a variable-rate-encoded stream constituting periodic data transmitted in a second cycle corresponding to a first cycle, wherein the stream is added to the stream. An information processing method, comprising: a determining step of determining a type of the periodic data to be performed; and an adding step of adding the periodic data of the type determined in the processing of the determining step to the stream. 8. An information processing program for statistically multiplexing a variable-rate encoded stream constituting periodic data transmitted in a second cycle corresponding to a first cycle, the program being added to the stream. A determining step of determining a type of the periodic data to be performed; and an adding step of adding the periodic data of the type determined in the processing of the determining step to the stream. A recording medium on which a program to be recorded is recorded.