JP3595316B2 - Data transfer device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a data transfer device that receives material data for a data broadcast that is repeatedly transmitted in digital broadcasting and controls the transfer of the received material data.
[0002]
[Prior art]
In recent years, in digital broadcasting, in addition to video data and audio data constituting a broadcast program, material data constituting a data broadcast program such as an electronic program guide, a weather forecast, and news have been multiplexed and broadcast.
These material data have different transmission systems from video data and audio data, and are transmitted by a transmission system called DSM-CC (Digital Storage Media Command and Control) carousel transmission system.
[0003]
Here, the “DSM-CC carousel transmission system” is a transmission system defined by the international standard ISO / IEC 13818-6 “Part 6: Extensions for Digital Storage Media Command and Control”, and data having the same content is cycled. In general, it refers to a transmission system that transmits repeatedly.
By using this transmission method, a data broadcast program having the same contents is repeatedly provided to the viewer, so that the viewer can take out the material data when necessary and view the data broadcast program.
[0004]
Digital broadcasting includes BS (Broadcasting Satellite) digital broadcasting using a broadcasting satellite and terrestrial digital broadcasting using a terrestrial wave. In digital terrestrial broadcasting, various multiplexed data are transmitted from a central television station (hereinafter, referred to as a "key station") as a data transmission source to a local television station (hereinafter, referred to as a "local station") as an affiliated station. Various data are transmitted to local stations using dedicated lines.
[0005]
As a result, the local station can provide a data broadcast program digitally broadcast at the key station to the viewer in real time.
[0006]
[Problems to be solved by the invention]
However, the data band that can be used for transmitting material data is generally different between the key station and the local station. If the data band that can be used by the key station is smaller than the data band that can be used by the local station, the data band that can be used from the key station is If the input material data is output as it is at the bit rate at the time of input, a part of the data band of the local station is not used for the output of the material data, causing a problem that it is wasted. Further, when the data band usable by the local station is smaller than the data band usable by the key station, there is a problem that material data input from the key station cannot be output as it is at the bit rate at the time of input.
[0007]
In view of the above problems, an object of the present invention is to provide a data transfer device and a data transfer method capable of receiving material data by effectively utilizing the data band of a local station and transferring the material data to a lower station. I do.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the present invention is a data transfer device that receives a data stream including a plurality of types of repeat data repeatedly transmitted from an upper station and transfers the repeat data to a lower station. Storage means having a storage area for storing data, extraction means for extracting each type of repeat data from a data stream received from an upper station, storage means for storing each extracted repeat data in the storage area, Data composition ratio determining means for determining the composition ratio between types of repeat data to be output per fixed time, and reading out each of the plurality of types of repeat data stored in the storage means, using the determined composition ratio Data output means for outputting.
[0009]
Here, the “lower station” refers to an external relay station or receiving apparatus.
Here, “transfer” refers to processing received data and transmitting it via broadcast or a line.
“Processing” refers to changing the transmission speed and composition ratio of received data.
[0010]
Here, the “repeat data” refers to a carousel, a module, and the like that constitute the material data.
The “carousel” refers to one unit of data that is repeatedly transmitted from a broadcasting station by a DSM-CC (Digital Storage Media Command and Control) carousel transmission method.
[0011]
The “module” is a minimum data unit meaningful as information, and is a data unit forming a carousel.
Further, each of the repeat data may be composed of a plurality of packet data transmitted by a carousel transmission method, and the data stream may be a transport stream.
[0012]
The present invention also provides a data stream having a storage area for receiving a data stream including a plurality of types of repeat data repeatedly transmitted from an upper station, transferring the repeat data to a lower station, and storing the plurality of types of repeat data. A data transfer method in a transfer device, comprising: an extraction step of extracting each type of repeat data from a data stream received from an upper station; a storage step of storing each extracted repeat data in the storage area; A data composition ratio determining step of determining a composition ratio between types of repeat data to be output to the memory device; and a data output for reading out each of the plurality of types of repeat data stored in the storage means and outputting the data at the determined composition ratio. Steps may be included.
[0013]
The present invention also provides a data stream having a storage area for receiving a data stream including a plurality of types of repeat data repeatedly transmitted from an upper station, transferring the repeat data to a lower station, and storing the plurality of types of repeat data. A computer-readable recording medium recording a program used in a transfer device, the program comprising: an extracting step of extracting each type of repeat data from a data stream received from an upper station; and A storage step of storing in a storage area, a data composition ratio determining step of determining a composition ratio between types of repeat data to be output per fixed time, and the plurality of types of repeat data stored in the storage unit. A data output step of reading and outputting at the determined composition ratio. It may be.
[0014]
The present invention also provides a data stream having a storage area for receiving a data stream including a plurality of types of repeat data repeatedly transmitted from an upper station, transferring the repeat data to a lower station, and storing the plurality of types of repeat data. A program used for the transfer device, wherein: an extraction step of extracting each type of repeat data from a data stream received from an upper station; a storage step of storing each extracted repeat data in the storage area; A data composition ratio determining step of determining a composition ratio between types of repeat data to be output to the memory device; and a data output for reading out each of the plurality of types of repeat data stored in the storage means and outputting the data at the determined composition ratio. Steps may be included.
[0015]
With this configuration, even when the data band usable by the local station is larger than the data band usable by the key station, the stored repeat data is read out a required number of times according to the band difference, thereby repeatedly transmitting the repeat data. Since it is possible to adjust the speed at which data is transmitted, it is possible to transfer each repeat data at a predetermined configuration ratio with high transmission efficiency by making the most of the available data band.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
<Structure>
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 shows a configuration of a main part of a data transfer device 100 according to an embodiment of the present invention. The data transfer device 100 includes a data storage unit 101, a data extraction unit 102, an extracted data count unit 103, a data composition ratio determination unit 104, a data output unit 105, and a data output rate storage unit 106.
[0017]
The data transfer device 100 includes, as hardware, a CPU, a ROM, a RAM, a hard disk, a decoder, a filter, and the like. A computer program is stored in the ROM or the hard disk, and the CPU operates according to the computer program. Thereby, the device achieves its function. Hereinafter, the same applies to the data transfer device 200, the data transfer device 300, the data transfer device 400, the data transfer device 500, and the data transfer device 600 described later.
[0018]
The data storage unit 101 includes a RAM, a hard disk, and the like, and stores the material data extracted by the data extraction unit 102. Specifically, the material data is stored in an allocated storage area (hereinafter, referred to as “allocated storage area”) for each module constituting the material data. The module will be described later.
FIG. 2 illustrates a format of material data transmitted from a broadcasting station by a DSM-CC (Digital Storage Media Command and Control) carousel transmission method. The material data is transmitted in packet data units of 200 to 209 shown in FIG. The packet data is composed of a fixed-length packet of one packet data of 188 bytes, and each packet data is identified by an identifier called a PID, a module ID, a block number included in the packet data, and an order in which the packet data is transmitted. .
[0019]
Here, "PID" refers to an identifier for distinguishing the type of packet data and carousel, and is used, for example, as an identifier for identifying each carousel and video data constituting the material data.
“Module ID” refers to an identifier for identifying each module constituting the carousel.
[0020]
“Block Number” refers to an identifier for identifying each section constituting the module.
“Section” refers to a data unit constituting a module.
Next, the relationship between packet data, sections, modules, carousels, and material data will be described. FIG. 3 is a diagram showing the above relationship.
[0021]
As shown in FIG. 3A, the material data is composed of a plurality of carousels 450 and 451, and as shown in FIG. 3B, the carousel is composed of a plurality of modules 350 and 351. As shown in FIG. 3C, the module is composed of a plurality of sections 300 to 345, and as shown in FIG. 3D, the section is composed of a plurality of packet data 250 to 273.
[0022]
Note that the parenthesized pnum in FIG. 3D is a number given for convenience of description, and indicates the number of the packet data of the section to which the packet data belongs. Actually, pnum is not added to the packet data, and the number of the packet data is identified by the position in the section of the transmitted packet data.
[0023]
In FIG. 2 and FIG. 3, each packet data is provided with a module ID and a block number (in this respect, it does not conform to the MPEG2 standard), but each section conforms to the MPEG2 standard. The module ID and the block number may be added only to the first packet data in. In this case, the module ID and block number of each packet data except the head in each section can be specified based on the transmission order of the packet data.
[0024]
FIG. 4 is a diagram schematically illustrating an example of the data structure of the material data stored in the data storage unit 101. As shown in FIG. 4, the material data is stored for each PID, module ID, and block number. Specifically, each piece of packet data constituting the material data (hereinafter, referred to as “material packet data”) is classified for each PID, and the material packet data having the same PID is further classified for each module ID. Each material packet data having the same module ID is classified and stored for each block number.
[0025]
For example, each material packet data having a PID of 100 is classified into modules 410 to 440 based on the module ID, and the material packet data further classified into each module is a section constituting the module based on the block number. (For example, in the module 410, the sections are classified into sections 420 to 430) and stored. Each of the classified sections stores material packet data belonging to the section. Specifically, the section 420 stores material packet data 421 to 424, and the section 430 stores material packet data 431 to 434.
[0026]
The data extraction unit 102 includes a transport stream decoder and the like, receives and decodes a transport stream (hereinafter, referred to as “TS”) including material data transmitted from the outside, and decodes the decoded data into a PID and Each module ID belonging to the PID is set as a filter condition and filtered, and material packet data is extracted in module units. The extracted module is stored in the data storage unit 101 in the allocated storage area allocated to the module.
[0027]
In the above, when the carousel having the same PID as the extracted carousel is already stored in the data storage unit 101, the carousel extracted is overwritten and stored in the storage area where the carousel is stored. As a result, the carousel extracted immediately before is stored in the data storage unit 101.
The extracted data counting unit 103 counts the number of material packet data received by the data extracting unit 102 per predetermined time from the data extracting unit 102 (hereinafter, referred to as “input packet data number”) for each module ID. The number of input packet data for each module ID is output to the data configuration ratio determining unit 104.
[0028]
FIG. 5 is a table showing an example of the number of input packet data for each module ID counted by the extracted data counting unit 103. The PID column 510 indicates the PID of the received material packet data, and indicates that the PID of the received material packet data is two types, 100 and 101.
The module ID column 520 indicates the module ID of the received material packet data. The carousel of PID100 is composed of two types of modules having the module IDs 0 and 1, and the carousel of PID101 is the module having the IDs of 0, 1, and 2. It shows that it is composed of three types of modules.
[0029]
The input packet number column 530 for the past one second indicates the number of input packet data counted for each module ID. For a carousel with a PID of 100, the number of input packet data with a module ID of 0 is 375 counts. For a carousel with an ID of 1 for an input packet of 125 counts and a PID of 101, the number of input packet data of a module ID of 0 is 600 counts, the number of input packets of a module ID of 1 is 200 counts, and the input of a module ID is 2 Indicates that the number of packets is 200 counts.
[0030]
Based on the number of input packet data for each module ID input by the extracted data counting unit 103, the data configuration ratio determination unit 104 determines the configuration ratio of material packet data to be output per fixed time between types of carousels ( Hereinafter, the “carousel composition ratio”) and the composition ratio of the material packet data to be output per fixed time between the types of each module (hereinafter, “module composition ratio”) are determined. Material packet data to be sequentially output is determined for each section so as to conform to the module configuration ratio, and the determined output target section is notified to the data output unit 105.
[0031]
Specifically, the ratio of the number of input packet data for each carousel (hereinafter, referred to as “PID ratio”) and the ratio of the number of input packet data for each module constituting the carousel (hereinafter, referred to as “module ratio”). ) Is calculated, the carousel composition ratio is determined according to the calculated PID ratio, the module composition ratio in the carousel to be output is further determined according to the module ratio, and the carousel composition ratio and the module composition ratio are sequentially determined so as to conform to the determined carousel composition ratio and module composition ratio. The section to be output is determined in the order of section arrangement in the module to which the section belongs, and the determined output target section is notified to the data output unit 105.
[0032]
The reason why material packet data to be sequentially output is determined in section units is that the MPEG2 standard prohibits mixed transmission of packet data of different sections within the same PID.
To explain using the example of FIG. 5, since the PID ratio of the carousel with a PID of 100 and the PID of 101 is 1: 2, the data configuration ratio determining unit 104 determines that the carousel with a PID of 100 and the carousel with a PID of 101 Are sequentially determined so that the carousel configuration ratio of the becomes 1: 2.
[0033]
Further, in this output target section sequential determination processing, since the carousel of each PID and the carousel with a PID of 100 have a module ratio of 3: 1, the module of module ID of 0 and the module of module ID of 1 The output target sections are sequentially determined from the sections belonging to each module ID so that the composition ratio becomes 3: 1. For the carousel having a PID of 101, the module ratio is 3: 1: 1. The output target sections are sequentially determined from the sections belonging to each module ID so that the module configuration ratio of the module having the module ID of 0, the module having the module ID of 1 and the module having the module ID of 2 is 3: 1: 1. The determined output target section And notifies the over data output unit 105.
[0034]
Here, the data configuration ratio determination unit 104 determines the PID of the carousel, the module ID of each module configuring the carousel, the block number of the section configuring each module, and the output target notified to the data output unit 105 immediately before. A management information table indicating the correspondence between the section and the block number is held, and the output target section is sequentially determined based on the information indicated by the management information table.
[0035]
FIG. 6 is a table showing an example of the management information table. The PID column 610 indicates the PID of each carousel, the module ID column 620 indicates the module ID of a module configuring each carousel, and the block number column 630 of the last section indicates the block number of the last section configuring each module. The immediately preceding block number column 640 indicates the block number of the output target section that has been notified to the data output unit 105 immediately before. For example, in FIG. 6, when the data configuration ratio determining unit 104 determines that the module with the module ID of 0 of the PID 100 is the output target module, the data configuration ratio determining unit 104 is the immediately preceding block number 2 in the module. Is obtained, and the magnitude relation between the acquired block number and L1 which is the block number of the last section in the module is compared. If 2 is smaller than L1, the block number which is the next block number in the module is 3 Is determined as an output target section, the PID, module ID, and block number of the determined section are notified to the data output unit 105, and the immediately preceding block number in the management information table is notified of block Number. To update the immediately preceding notification block Number of r column 640 to 3.
[0036]
On the other hand, when 2 is not smaller than L1, the first section (section with a block number of 0) in the module is determined as an output target section, and the PID, module ID, and block number of the determined section are output to the data output unit 105. Notify and update the immediately preceding notification block number in the immediately preceding notification block number column 640 of the management information table to 0.
[0037]
The information of the PID column 610, the module ID column 620, and the block number column 630 of the last section in the management information table may be set in advance or may be transmitted material packet data (for example, in the carousel of each PID). It may be included in advance in the first material packet data) and acquired by the data composition ratio determining unit 104 via the data extracting unit 102.
[0038]
FIG. 7 shows parameters used by the data configuration ratio determination unit 104 to perform the output target PID and output target section determination processing. The PID column 710 indicates the PID of each carousel, the PID multiplex count column 720 indicates the PID multiplex count for each PID, the PID multiplex integrated count column 730 indicates the PID multiplex integrated count for each PID, and the module ID A column 740 indicates a module ID of a module configuring each carousel, a module multiplex count column 750 indicates a module multiplex count for each module ID, and a PID multiplex integration count column 760 indicates a module multiplex integration for each module ID. Indicates a count.
[0039]
The data configuration ratio determining unit 104 calculates a PID multiplex count and a PID multiplex integration count for each PID, and calculates a module multiplex count and a module multiplex integration count for each module ID.
Here, the “PID multiplex count” refers to a value set to have a relationship between the PID ratio and the inverse ratio. For example, referring to the example of FIG. 5, the PID ratio of a carousel having a PID of 100 and a PID of 101 is 1: 2.7As shown in FIG. The value of the PID multiplex count may be set to be the inverse ratio of the PID ratio. For example, if the PID multiplex count of a carousel with a PID of 100 is set to 1 instead of 2, the PID becomes 101 May be set to 0.5 instead of 1 for the carousel.
[0040]
The “PID multiplex integration count” refers to a parameter for determining an output target PID in the operation of an output target PID and a section determination process described later, and an output target section in a carousel of the output target PID is determined. Each time the PID multiplex count for the PID is added to the initial value.
FIG. 8 is an example of a table showing the state of the PID multiplex accumulation count held by the data composition ratio determination unit 104. FIG. 8A shows that each PID multiplex accumulation count is in an initial state. In this state, the data configuration ratio determining unit 104 sets a carousel with a PID of 100 as an output target (a carousel with a PID of 101 may be set as an output target), and determines an output target section in the carousel set as an output target. Then, the multiplex count 2 of the PID is added to the multiplex accumulation count of the PID of 100, and the PID multiplex accumulation count table is updated to the state shown in FIG.
[0041]
Next, in the updated PID multiplex accumulation count table, the data configuration ratio determining unit 104 sets the carousel whose PID having the smaller PID multiplex accumulation count value is 101 as an output target and determines an output target section in the carousel to be output. Adds the multiplex count 1 of the PID to the multiplex count of 101, and updates the PID multiplex count table to the state shown in FIG. Further, the data composition ratio determining unit 104 repeats the above processing to update the PID multiplex accumulation count table.
[0042]
“Module multiplex count” refers to a value set so as to have a relationship between a module ratio and an inverse ratio. For example, using the example of FIG. 5, the module ratio for a carousel with a PID of 100 is 3: 1. When this is expressed as a module multiplex count ratio, it becomes 1: 3 as shown in FIG. 7. . Further, the value of the module multiplex count may be set to be the inverse ratio of the module ratio. For example, when the module multiplex count of the module ID of 0 in the carousel with the PID of 100 is set to 1 instead of 8, May set the module multiplex count of module ID 1 to 3 instead of 24.
[0043]
“Module multiplex integration count” refers to a parameter for determining the output target section in the operation of the data composition ratio determination processing described later, and every time the output target section is determined, the module to which the section belongs is referred to. (Hereinafter, referred to as a “module multiplex count multiplied value”) multiplied by the number of material packet data included in the output target section.
[0044]
FIG. 9 is an example of a module multiplex integration count table showing the state of the module multiplex integration count held by the data configuration ratio determining unit 104. FIG. 9A shows that the multiplex integration counts of the module IDs 0 to 2 in the carousel with the PID of 101 are in the initial state. In this state, the data configuration ratio determining unit 104 sets the module whose module ID is 0 as an output target (or may set a module having another module ID as an output target), and outputs an output target section of the module set as the output target. Is determined, the module multiplex integration count of the module ID of 0 is multiplied by the module multiplex count multiplication value 50 of the module ID (here, for convenience of explanation, the number of material packet data included in the section is uniformly set to 10, and the module multiplex count is The module multiplex count value shown in the example of FIG. 7 using a module multiplex count value of 101 having a PID of 101 (5 for a module with a module ID of 0, 15 for a module with a module ID of 1, and 15 for a module with a module ID of 2) is used. And calculates the count multiplied value.) Adds, updates the module multiplex accumulated count table to the state of FIG. 9 (B).
[0045]
The above-described module multiplex count multiplication value 50 with a module ID of 0 is calculated by multiplying the module multiplex count of 5 with a module ID of 0 by 10 the number of material packet data included in the output target section. Hereinafter, similarly, module multiplication count multiplication values of module IDs 1 and 2 are calculated.
Next, the data composition ratio determining unit 104 sets a module having a module ID of 1 having a small module multiplex integrated count value as an output target in the updated module multiplex integrated count table (a module having a module ID of 2 may be set as an output target). When the output section of the module to be output is determined, the module multiplex count multiplication value 150 of the module ID is added to the module multiplex accumulation count of the module ID of 1, and the module multiplex accumulation count table is changed as shown in FIG. Update to state. Further, the data composition ratio determining unit 104 repeats the above processing to update the module multiplex accumulation count table.
[0046]
The operation of the output target PID and output target section determination processing performed by the data configuration ratio determination unit 104 will be described later.
The data output unit 105 has a memory for storing material packet data to be output. Based on the PID, module ID, and block number of the output target section notified from the data composition ratio determination unit 104, the data output unit 105 The contained material packet data is read from the data storage unit 101, the read material packet data is written into a memory as a queue and written in the arrangement order of the material packet data in the section, and the data output rate storage unit is written in the written order of each material packet data Output at the total output bit rate stored in 106.
[0047]
As a result, the total output bit rate is distributed to each carousel and each module in a distribution according to the carousel composition ratio and the module composition ratio determined by the data composition ratio determining unit 104, and is output per fixed time. The composition ratio between each carousel and each module to be executed is also determined.
Here, the “total output bit rate” refers to the output bit rate of the entire material packet data set in advance by the operator.
[0048]
Further, "output" means to transmit via a broadcast or a line.
The data output rate storage unit 106 stores a total output bit rate set in advance by an operator.
<Operation>
Next, the operation of the output target PID and output target section determination processing performed by the data configuration ratio determination unit 104 will be described. Hereinafter, the operation of the above processing will be described.
[0049]
FIG. 10 is a flowchart illustrating the output target section determination process performed by the data configuration ratio determination unit 104. The data composition ratio determining unit 104 sets the minimum PID multiplex integration count (M1) indicating the minimum value of the PID multiplex integration count to infinity, which is the initial value (step S1001), and sets the minimum value in the PID multiplex integration count table.In orderEach PID multiplex integrated count is read (step S1002), and it is compared whether the read PID multiplex integrated count is smaller than M1 (step S1003).
[0050]
If it is smaller (step S1003: Y), the PID multiplex accumulation count is set to the minimum PID multiplex accumulation count (M1) (step S1004), and it is determined whether the comparison has been completed for all the read PID multiplex accumulation counts. (Step S1005).
When the comparison is completed (step S1005: Y), the PID indicating the PID multiplex integration count value set to the minimum PID multiplex integration count (M1) is determined as the output target PID (step S1006), and the determined output target PID is determined. The output section is determined (steps S1007 and S1007 will be described later in detail), and the PID multiplex count of the output PID is added to the PID multiplex count of the PID (step S1008), and the PID multiplex is performed. The cumulative count table is updated to a value obtained by adding the PID multiplex cumulative count of the corresponding PID (step S1009), and the processing of steps S1001 to S1009 is repeated.
[0051]
If it is not small in step S1003 (step S1003: N), the processing of step S1005 is performed. If the comparison has not been completed in step S1005 (step S1005: N), the process proceeds to step S1005.1002~ StepSStep 1005 is repeated.
[0052]
FIG. 11 is a flowchart illustrating the content of the process in step S1007 performed by the data configuration ratio determining unit 104.
When determining the output target PID in step S1006, the data configuration ratio determining unit 104 sets the minimum module multiplex integration count (M2) indicating the minimum value of the module multiplex integration count to an initial value of infinity (step S1101). Then, each module multiplex integration count is sequentially read from the module multiplex integration count table (step S1102), and it is determined whether the read module multiplex integration count is smaller than M2 (step S1103).
[0053]
If it is smaller (step S1103: Y), the module multiplex integration count is set to the minimum module multiplex integration count (M2) (step S1104), and it is determined whether the comparison has been completed for all the read module multiplex integration counts. (Step S1105).
When the comparison is completed (step S1105: Y), the module indicating the module multiplex integration count value set to the minimum module multiplex integration count (M2) is determined as the output target module (step S1106), and the information in the management information table is determined. By referring to the determined output target module, the next section of the output target section notified immediately before to the data output unit 105 (when the section notified immediately before does not exist or the section notified immediately before is the last section) Determines the first section in the output target module) as the output target section (step S1107), and notifies the data output section 105 of the determined output target section (step S1108) Packet data output The processing will be described later.), The module multiplex count multiplied value calculated for the module is added to the module multiplex integrated count of the output target module (step S1109), and the module multiplex integrated count of the module in the module multiplex integrated count table is added. Is updated (step S1110), and the process of step S1008 in FIG. 10 is performed.
[0054]
If it is not small in step S1103 (step S1103: N), the processing of step S1105 is performed.
If the comparison has not been completed in step S1105 (step S1105: N), the processing of steps S1102 to S1105 is repeated.
Next, a description will be given of material packet data output processing performed by the data output unit 105 that has been notified of the output target section from the data configuration ratio determination unit 104.
[0055]
FIG. 25 is a flowchart showing the material packet data output processing performed by the data output unit 105. Based on the PID, module ID, and block number of the output target section notified from the data configuration ratio determining unit 104 in step S1108 in FIG. 11, the data output unit 105 stores the material packet data included in the section into the data storage unit 101. (Step S2401), the read material packet data is written in the memory as a queue in the order of arrangement of the material packet data in the section (step S2402), and the total output bit rate stored in the data output rate storage unit 106 is read (step S2402). In step S2403, the written material packet data is output at the read total output bit rate in the order of writing (step S2404).
[0056]
Accordingly, the material packet data belonging to each carousel and each module is stored in the memory by the data output unit 105 in a distribution according to the carousel configuration ratio and the module configuration ratio determined by the data configuration ratio determining unit 104 according to the PID ratio and the module ratio. Since the data is written and output from the memory, the total output bit rate is distributed to each carousel and each module according to the carousel configuration ratio and the module configuration ratio determined by the data configuration ratio determining unit 104 according to the PID ratio and the module ratio, and is constant. The composition ratio between each carousel and each module output per time is also determined.
[0057]
(Embodiment 2)
In the data transfer device 100 according to the first embodiment, the number of input packet data is acquired by the extracted data counting unit 103, and the carousel composition ratio and the module composition ratio are determined based on the acquired number of input packet data. The data transfer device 200 of the present embodiment acquires output bit rate information from a TS transmitted from the outside, and determines a carousel configuration ratio and a module configuration ratio based on the acquired output bit rate information.
[0058]
Here, "output bit rate information" refers to information indicating an output bit rate allocated to each module.
<Structure>
FIG. 12 shows a configuration of a main part of the data transfer device 200 according to the embodiment of the present invention. The data transfer device 200 includes a data storage unit 101, a data extraction unit 102, an extracted data analysis unit 203, a data composition ratio determination unit 104, a data output unit 105, and a data output rate storage unit 106.
[0059]
The same components as those of the data transfer device 100 according to the first embodiment shown in FIG. 1 are denoted by the same reference numerals, and the following description will focus on the differences.
In the present embodiment, the output bit rate information is transmitted as being embedded in the TS as packet data to which an output information identifier for identifying the output bit rate information is added.
[0060]
FIG.Output bit rate informationHere is an example of the content of The PID column 510 indicates the PID of the carousel to be output, and indicates that the PID of the carousel to be output is of two types, 100 and 101. The module ID column 520 indicates the module ID of the module to be output. The carousel of PID 100 is composed of two types of module IDs 0 and 1, and the carousel of PID 101 is three types of module IDs 0, 1, and 2. Indicates that the module is composed of
[0061]
The module rate column 530 indicates the output bit rate allocated to the module of each module ID. For a carousel with a PID of 100, the output bit rate of the module with a module ID of 0 is 375 Kbps (kilobits / second). The output bit rate of the module with ID 1 is 125 Kbps, and for the carousel with PID 101, the output bit rate of the module with module ID 0 is 600 Kbps, and the output bit rate of the module with module ID 1 is 200 Kbps. Yes, indicating that the output bit rate of the module with the module ID of 2 is 200 Kbps.
[0062]
Data extraction unit102Extracts packet data having an output information identifier from the TS, and outputs the packet data to the extracted data analysis unit 203. The extraction data analysis unit 203 includes a data extraction unit102Then, output bit rate information is obtained from the packet data having the output information identifier input from, and the obtained output bit rate information is output to the data composition ratio determining unit 104.
[0063]
The data configuration ratio determination unit 104 determines the carousel configuration ratio and the module configuration ratio based on the output bit rate information input by the extracted data analysis unit 203, and adjusts the carousel configuration ratio and the module configuration ratio to match the determined carousel configuration ratio and module configuration ratio. Material packet data to be sequentially output is determined for each section, and the determined output target section is notified to the data output unit 105.
[0064]
The operations of the output target PID determining process and the output target section determining process performed by the data configuration ratio determining unit 104 are the same as those in the first embodiment, and thus description thereof will be omitted.
(Embodiment 3)
<Structure>
FIG. 14 shows a configuration of a main part of the data transfer device 300 according to the embodiment of the present invention. The data transfer device 300 includes a data storage unit 101, a data extraction unit 102, a data composition ratio determination unit 104, a data output unit 105, a data output rate instruction unit 303, and an instruction information storage unit 306.
[0065]
The same components as those of the data transfer device 100 according to the first embodiment shown in FIG. 1 are denoted by the same reference numerals, and the following description will focus on the differences.
The data output rate instructing unit 303 receives the settings of the total output bit rate, the PID rate ratio, and the module rate ratio from the operator, stores them in the instruction information storage unit 306, and stores the material data at the set total output bit rate. Is output to the data output unit 105, and the set PID rate ratio and module rate ratio are notified to the data configuration ratio determining unit 104.
[0066]
Here, the “PID rate ratio” refers to a ratio indicating a ratio of distributing the total output bit rate to the carousels of each PID.
The “module rate ratio” refers to a ratio indicating a rate at which an output bit rate allocated to a carousel of each PID is allocated to a module of each module ID belonging to the PID according to the PID rate ratio.
[0067]
The instruction information storage unit 306 stores a total output bit rate, a PID rate ratio, and a module rate ratio (hereinafter collectively referred to as “instruction information”) set by an operator.
FIG. 15 is a table showing an example of the instruction information. The total output bit rate column 1510 indicates the total output bit rate of the material data, the PID column 1520 indicates the PID of each carousel constituting the material data, and the PID rate ratio column 1530 indicates the PID rate allocated to each PID. The module ID column 1540 shows the module ID of the module constituting each carousel, and the module rate ratio column 1550 shows the module rate ratio allocated to the module of each module ID.
[0068]
The data configuration ratio determining unit 104 sets a PID multiplex count and a PID multiplex integration count for each PID based on the PID rate ratio and the module rate ratio notified from the data output rate instruction unit 303, and Is set to the module multiplex count and the module multiplex integration count.
Specifically, the PID multiplex count is set for each PID so that the ratio of the PID multiplex count in each PID is inversely related to the PID rate ratio, and the PID multiplex count is set for each PID based on the set PID multiplex count. Calculate the multiple integration count.
[0069]
Also, a module multiplex count is set for each module ID so that the ratio of the module multiplex count in each module ID is inversely related to the module rate ratio, and for each module ID based on the set module multiplex count. Calculate the module multiplex integration count.
Note that the PID multiplex integrated count and the module multiplex integrated count are calculated in the same manner as in the first embodiment.
[0070]
Also, the operation of the output target PID and output target section determination processing performed by the data configuration ratio determination unit 104 is the same as that in the first embodiment, and a description thereof will be omitted.
Accordingly, the material packet data belonging to each carousel and each module is distributed by the data output unit 105 in a distribution according to the carousel configuration ratio and the module configuration ratio determined by the data configuration ratio determining unit 104 according to the PID rate ratio and the module rate ratio. Since the data is written to the memory and output from the memory, the total output bit rate is assigned to each carousel and each module according to the carousel composition ratio and the module composition ratio determined by the data composition ratio determining unit 104 according to the PID rate ratio and the module rate ratio. The composition ratio between each carousel and each module that is distributed and output per fixed time is also determined.
[0071]
Referring to the example of FIG. 15, the total output bit rate of 2000 Kbps is distributed to a carousel with a PID of 100 and a carousel with a PID of 101 at a PID rate ratio of 1: 2 (667 Kbps for the former and 667 Kbps for the latter). 1333 Kbps is allocated.) Further, the bit rate of 667 Kbps allocated to the carousel having a PID of 100 is a module rate ratio of 2: 1 between each module constituting the carousel, and a module having a module ID of 0. The module ID is redistributed to one module (445 Kbps is allocated to the former and 222 Kbps is allocated to the latter), and the bit rate of 1333 bps allocated to the carousel with the PID of 101 is between the modules constituting the carousel. Module rate ratio of 3: 1: 1 Then, the module ID is redistributed to each of the modules 0, 1, and 2 (800 Kbps, 266 Kbps, and 266 Kbps are allocated, respectively).
[0072]
As described above, in the present embodiment, it is possible to adjust the output bit rate of the carousel and the module constituting the material data to a desired output bit rate as needed.
(Embodiment 4)
In the data transfer device 300 according to the third embodiment, the instruction information is obtained from the data output rate instruction unit 303. However, the data transfer device 400 according to the third embodiment transmits the instruction information to the TS transmitted from the outside. To get from.
<Structure>
FIG. 16 shows a configuration of a main part of the data transfer device 400 according to the embodiment of the present invention. The data transfer device 400 includes a data storage unit 101, a data extraction unit 102, an instruction information analysis unit 403, a data composition ratio determination unit 104, a data output unit 105, and a data output rate storage unit 106.
[0073]
The same components as those of data transfer device 300 according to the third embodiment shown in FIG. 14 are denoted by the same reference numerals, and the following description will focus on differences.
In the present embodiment, the instruction information is transmitted as being embedded in the TS as packet data to which an instruction information identifier for identifying the instruction information is added.
The content of the instruction information is the same as the content of FIG.
[0074]
The instruction information analysis unit 403 acquires the instruction information from the packet data having the instruction information identifier input from the data extraction unit 102, and outputs the acquired instruction information to the data configuration ratio determination unit 104.
The data configuration ratio determination unit 104 determines the carousel configuration ratio and the module configuration ratio based on the instruction information input by the instruction information analysis unit 403, and sequentially outputs the data so as to conform to the determined carousel configuration ratio and module configuration ratio. Material packet data to be determined is determined in section units, and the determined output target section is notified to the data output unit 105.
[0075]
The operation of the output target PID and output target section determination process performed by the data configuration ratio determination unit 104 is the same as that in the first embodiment, and thus the description is omitted.
(Embodiment 5)
<Structure>
FIG. 17 shows a configuration of a main part of the data transfer device 500 according to the embodiment of the present invention. The data transfer device 500 includes a data storage unit 101, a data extraction unit 102, an extracted data count unit 103, a data composition ratio determination unit 104, a data output unit 505, a data output rate storage unit 106, an AV data acquisition unit 507, and a null packet detection. 508.
[0076]
The same components as those of the data transfer device 100 according to the first embodiment shown in FIG. 1 are denoted by the same reference numerals, and the following description will focus on the differences.
The video data acquisition unit 507 receives and receives a TS including video packet data, audio packet data, and Null packet data (hereinafter, three packet data are collectively referred to as “AV packet data”) transmitted from the outside. Each AV packet data is output to the data output unit 505.
[0077]
The Null packet detection unit 508 detects Null packet data from the AV packet data received by the video data acquisition unit 507 by recognizing the PID assigned to the Null packet data, and detects the Null packet data. The signal is output to the data output unit 505.
Here, “Null packet data” means that when the amount of packet data such as video data transmitted from the transmitting side fluctuates with time, the amount of packet data is insufficient to keep the amount of packet data at a predetermined amount. This refers to dummy packet data that is not involved in reproduction and display of data having a preset PID, which is added to supplement the amount of packet data that has been set.
[0078]
The data output unit 505 performs a process of writing material packet data and a process of selecting packet data to be output.
First, the writing process of the material packet data will be described. The data output unit 505 has a memory for storing material packet data to be output, similarly to the data output unit 105 of the first embodiment, and the PID of the output target section notified from the data composition ratio determination unit 104 , Module ID and block number, the source packet data included in the section is read from the data storage unit 101, and the read source packet data is written in the memory as a queue.
[0079]
Next, the packet data selection processing will be described. The data output unit 505 selects packet data to be output, and outputs the selected packet data.
Specifically, after receiving the AV packet data input from the video data acquisition unit 507 and not detecting the input of the detection signal from the null packet detection unit 508 within a predetermined time, the packet data to be output is regarded as the packet data to be output. The AV packet data is selected, the selected AV packet data is output, and when the input of the detection signal is detected within a predetermined time, the AV packet data input from the video data extraction unit 507 is recognized as Null packet data. The head packet data of the queue written in the memory is output instead of the null packet data.
[0080]
As a result, each Null packet data included in the data stream of the extracted AV packet data is of a type sequentially selected according to the priority order according to the carousel configuration ratio and the module configuration ratio determined by the data configuration ratio determining unit 104. The output is replaced with each material packet data.
FIG. 18 shows an example of a data stream of AV packet data received by the video data acquisition unit 507. In FIG. 18, data 2 indicates AV packet data other than null packet data, and NULL indicates null packet data.
[0081]
FIG. 19 shows an example of a data stream that the data output unit 505 receives from the video data extraction unit 507 and receives the AV packet data shown in FIG.FIG., Data 1 indicates material packet data replaced and output by the data output unit 505 instead of the null packet data.
<Operation>
Next, the operation of the packet data selection processing performed by the data output unit 505 will be described. FIG. 20 is a flowchart illustrating the operation of the packet data selection process performed by the data output unit 505. Hereinafter, the operation of the selection process will be described with reference to the flowchart of FIG.
[0082]
When receiving the AV packet data from the video data acquisition unit 507 (step S1201: Y), the data output unit 505 determines whether or not a detection signal is input from the null packet detection unit 508 within a predetermined time (step S1202). ).
If there is an input (step S1202: Y), the first packet data of the material packet data stored as a queue in the memory is read, and the material packet data is selected as the packet data to be output (step S1203). The data is output (step S1204).
[0083]
If there is no input (step S1202: N), the received AV packet data is selected as the packet data to be output (step S1205), and the selected packet data is output (step S1204).
(Embodiment 6)
The data transfer device 100 according to the first embodiment outputs material packet data according to the carousel configuration ratio and the module configuration ratio determined according to the PID ratio and the module ratio. Reference numeral 600 outputs material packet data according to a preset data composition ratio.
<Structure>
FIG. 21 shows a configuration of a main part of the data transfer device 600 according to the embodiment of the present invention. The data transfer device 600 includes a data storage unit 101, a data extraction unit 102, a data output unit 605, and a data output rate storage unit 106.
[0084]
The same components as those of the data transfer device 100 according to the first embodiment shown in FIG. 1 are denoted by the same reference numerals, and the following description will focus on the differences.
The data output unit 605 performs a process of determining a data composition ratio of material packet data to be output and a process of outputting material packet data.
First, the data composition ratio determination processing will be described. The data output unit 605 outputs the identifiers of the material packet data in the order of the identifiers PID, module ID, and block number (for example, in the case of the material data shown in FIG. 4, the packet data 421, 422, 423 Material packet data to be output is determined, and the material packet data determined as a queue is sequentially written into a memory of the data output unit 605. Thus, the data configuration ratio of the material packet data having each PID and each module ID is determined.
[0085]
Next, output processing of material packet data will be described. The data output unit 605 outputs the material packet data written in the memory at the total output bit rate stored in the data output rate storage unit 106 in the order of writing.
<Operation>
Next, the operation of the data composition ratio determination processing performed by the data output unit 605 will be described.
[0086]
FIG. 22 is a flowchart showing the above operation. The data output unit 605 sets the PID next to the PID of the material packet data output immediately before as the output target PID (step S1301). Here, when there is no material packet data output immediately before and when the data composition ratio determination process starts, the first PID is set as the output target PID.
Further, the data output unit 605 determines whether the material packet data output immediately before is the last material packet data in the section in the carousel of the PID to be output (step S1302). Whether or not it is the last material packet data in the section can be determined, for example, by adding a flag indicating the last to the last material packet data.
[0087]
If it is the last material packet data (step S1302: Y), it is determined whether the section to which the last material packet data belongs is the last section in the module to which the section belongs (step S1303). Whether or not the section is the last section indicates, for example, the number of sections in the module to which the section belongs and the number of the section in the module, which is indicated by header information included in the head material packet data of each section. It can be determined by comparing with the section number.
[0088]
If it is the last section (step S1303: Y), it is determined whether the module to which the section belongs is the last module in the carousel to which the module belongs (step S1304). Whether or not the module is the final module is determined, for example, by storing the final module ID of a module constituting the carousel of each PID in the data storage unit 101, and the data output unit 605 determines the stored final module ID and the section to which the section belongs. The determination may be made by comparing with the module ID of the module, or information of the last module ID may be described in DII (DownloadInfoIndication) included in the carousel of each PID, and the data output unit 605 may output the data extraction unit 102 May be determined based on the information of the last module ID described in the DII stored in the data storage unit 101.
[0089]
If it is the last module (step S1304: Y), the first material packet data belonging to the first section of the first module in the carousel of the PID next to the output target PID is set as output target packet data (step S1305), and the material packet The data is written to the memory (step S1306).
If it is not the last material packet data in step S1302 (step S1302: N), the material packet data next to the material packet data in the section is set as the output target packet data (step S1307), and the material packet data is written in the memory (step S1307). Step S1306).
[0090]
If it is not the last section in step S1303 (step S1303: N), the first material packet data belonging to the section next to the section in the module to which the section belongs is set as output target packet data (step S1308), and the material packet data is Write to the memory (step S1306).
[0091]
If it is not the last module in step S1304
Step S1304: Y), the first material packet data belonging to the first section of the module following the module in the carousel to which the module belongs is set as output target packet data (step S1309), and the material packet data is written to the memory (step S1304). S1306).
[0092]
In the above processing, the output target packet data is determined in order from the head material packet data of the carousel of each PID, but the procedure of the determination processing is not limited to the above case.
For example, priorities may be assigned between modules, and the processing of determining material packet data may be performed in order of priority. Alternatively, priorities may be determined between carousels, and processing of determining material packet data may be performed in order of priority. It may be. Further, the output target packet data may be determined so that material packet data in sections having different PIDs are mixed.
[0093]
The embodiments of the present invention have been described above, but it is needless to say that the present invention is not limited to these embodiments.
For example, in the first embodiment, the data output unit 105 outputs the material packet data written in the memory at the total output bit rate stored in the data output rate storage unit 106. May be output with the temporal change of the total output bit rate for the output. More specifically, when the operator inputs a new total output bit rate to the data output rate storage unit 106 as needed, the data output unit 105 outputs the material packet data by changing the total output bit rate with time. can do. The data output rate storage unit 106 stores a plurality of total output bit rates in association with time information indicating a time zone for outputting at the total output bit rate. Based on this, the corresponding total output bit rate may be selected and output.
[0094]
Thereby, according to the carousel configuration ratio and the module configuration ratio determined by the data configuration ratio determining unit 104, the material packet data can be output at a desired total output bit rate according to time.
Also, in the first embodiment, the data configuration ratio determining unit 104 determines the carousel configuration ratio and the module configuration ratio based on the number of input packet data for each module ID input by the extracted data counting unit 103. However, regardless of the number of input packet data, the allocation ratio of the total output bit rate is determined in advance for each PID and module ID, and the carousel configuration ratio and the module configuration ratio may be determined based on the determined allocation ratio. Good.
[0095]
In the first embodiment, the data configuration ratio determining unit 104 determines the carousel configuration ratio and the module configuration ratio element based on the number of input packet data for each module ID input by the extracted data counting unit 103. However, a part (for example, a material packet data group with a PID of 101 in the first embodiment) may be determined according to a preset bit rate regardless of the number of input packet data.
[0096]
In the third and fourth embodiments, the data configuration ratio determining unit 104 sets the PID multiplex count and the module multiplex count based on the PID rate ratio and the module rate ratio. The module multiplex count may be set based on the PID rate ratio, and the module multiplex count may be set based on the module ratio calculated based on the number of input packet data for each module configuring the carousel, as in the first embodiment. . In this case, by adding the extracted data counting unit 103 as a component of the data transfer devices 300 and 400, the function performed by the data configuration ratio determining unit 104 can be realized.
[0097]
Similarly, only the module multiplex count is set based on the module rate ratio, and the PID multiplex count is set based on the PID ratio calculated based on the number of input packet data for each carousel, as in the first embodiment. It may be.
In the third embodiment, instead of using the PID rate ratio and the module rate ratio, the output bit rate of the material packet data for calculating the PID rate ratio and the module rate ratio is assigned to each PID and module ID. Is also good. In this case, the data configuration ratio determining unit 104 calculates the PID rate ratio and the module rate ratio based on the output bit rates assigned to the carousels and modules of each PID and each module ID, and The same processing is performed.
[0098]
In the above case, the output bit rate of the material packet data may be assigned to some carousels instead of using the PID rate ratio and the module rate ratio. In this case, the output bit rate obtained by subtracting the allocated output bit rate from the total output bit rate is allocated to the carousels and modules of each PID and each module ID according to the ratios indicated by the PID rate ratio and the module rate ratio. Will be.
[0099]
In the third embodiment, two parameters, the PID rate ratio and the module rate ratio, are used to allocate the total output bit rate. However, only the module rate ratio may be used. In this case, the total output bit rate is allocated to the modules of each module ID according to the ratio indicated by the module rate ratio.
In the above case, instead of using the module rate ratio, an output bit rate for calculating the module rate ratio may be assigned to each module of each module ID. In this case, the data configuration ratio determining unit 104 calculates the module rate ratio based on the output bit rate assigned to the module of each module ID, and performs the same processing as in the above case.
[0100]
In the above case, the output bit rate may be assigned to some modules instead of using the module rate ratio. In this case, the output bit rate obtained by subtracting the allocated output bit rate from the total output bit rate is allocated to the modules of each module ID according to the ratio indicated by the module rate ratio.
[0101]
In the third embodiment, a predetermined output bit rate may be allocated even when material packet data having a module ID for which a module rate ratio is not set is extracted.
For example, in the example of FIG. 15, when material packet data of a module having a module ID of 2 and no module rate ratio is set, a predetermined module rate ratio (for example, 1) is allocated to the module. Is also good.
[0102]
Further, in the third embodiment, when the material packet data of the module ID for which the module rate ratio is set is not extracted, a predetermined module rate ratio may be allocated to modules other than the module ID.
For example, in the example of FIG. 15, when only the material packet data having the module IDs 0 and 1 are extracted from the modules having the PID 101, the module rate ratio set for the module having the module ID 2 is set. May be ignored, and the output bit rate may be allocated to each of the modules having module IDs 0 and 1 at a module rate ratio of 3: 1.
[0103]
In the third and fourth embodiments, the total output bit rate is allocated in advance to two output bit rates of a minimum output bit rate and a surplus output bit rate, and the minimum output bit rate is allocated to each carousel. May be redistributed to carousels and modules of each PID and module ID that are prioritized based on the PID rate ratio and the module rate ratio. The distribution ratio of the output bit rate may be fixedly set in advance, or may be temporally changed by an operator's input or the like.
[0104]
In the third and fourth embodiments, the PID rate ratio, the module rate ratio, and the total output bit rate may be changed with time by an operator's input or the like.
Also, in the fifth embodiment, each Null packet data included in the data stream of the extracted AV packet data is replaced with each material packet data determined by the data composition ratio determining unit 104 and output. However, the packet data to be replaced is not limited to Null packet data, and may be AV packet data having another specific PID or a plurality of types of AV packet data.
[0105]
In the fifth embodiment, instead of replacing packet data, packet data having a specific PID may be detected, and the PID may be rewritten to a predetermined PID and output. For example, in the data transfer device 500, when a specific PID is detected in the Null packet detection unit 508, a function of notifying a detection signal to the data output unit 505 is added, and a predetermined PID to be rewritten in the data storage unit 101 is added. When the detection signal is input from the null packet detection unit 508 to the data output unit 505, a predetermined PID to be rewritten is read from the data output rate storage unit 106, and the data output unit 505 has the specific PID detected. This can be realized by adding a function of rewriting the PID of the packet data to the read predetermined PID and outputting the packet data.
[0106]
In the first to fourth embodiments, when the output target PID notified from the data composition ratio determining unit 104 is a specific PID, the data output unit 105 outputs each material included in the output target section belonging to the PID. The PID of the packet data may be rewritten to a predetermined PID, written to the memory, and output. The above function is added to the data storage unit 101, for example, in which a PID to be rewritten for identifying a PID to be rewritten and a PID after rewriting for identifying the rewritten PID of the PID are stored in association with each other. Each time the data composition ratio determination unit 104 notifies the data output unit 105 of the output target PID, the data output unit 105 determines whether or not the notified PID matches the rewrite target PID. This can be realized by reading the rewritten PID corresponding to the PID to be rewritten from the storage unit 101 and adding a function of rewriting the PID of each material packet data to the read PID. The PID to be rewritten and the PID after rewriting may be plural. In this case, the data storage unit 101 stores each x-rewritten PID in association with each PID to be rewritten.
[0107]
In Embodiments 1 to 4 and Embodiment 6, the data transfer device may store the extracted material data every time the material data is updated.
The function described above is performed, for example, by including, in each material packet data, update information (for example, a flag, a version number) indicating that the material data has been updated, Then, it can be realized by determining whether or not the material data has been updated, and storing the material packet data in the data storage unit 101 when the material data has been updated. It should be noted that the material packet data unit to be updated may be a module unit or a carousel unit.
[0108]
Further, instead of including the update information in each material packet data, the DII included in each carousel includes the update information, and the material packet data is updated in the data extracting unit 102 based on the updated information included in the extracted DII. Alternatively, it may be determined whether or not it has occurred.
In the first to fifth embodiments, the process of determining the output target packet data is performed in section units, but may be performed in material packet data units.
[0109]
The process for determining the output target PID in this case is the same as the process illustrated in FIG. 10 except that the process in step S1007 is the output target packet determination process (step S2007), and thus the description is omitted. Hereinafter, the output target packet data determination processing performed by the data configuration ratio determination unit 104 in step 2007 will be described.
[0110]
FIG. 23 and FIG. 24 are flowcharts illustrating the output target packet determination process performed by the data configuration ratio determination unit 104. The determination process will be described with reference to FIGS.
When determining the output target PID in step S1006, the data configuration ratio determining unit 104 determines whether the material packet data that was immediately notified to the data output unit 105 in the material packet data belonging to the output target PID is the last in the section to which the material packet data belongs. It is determined whether the data is packet data (step S2101).
[0111]
If it is the last packet data (step S2101: Y), the data configuration ratio determining unit 104 sets the minimum module multiplex integration count (M2) indicating the minimum value of the module multiplex integration count to infinity, which is the initial value (step S2101: Y). In step S2102, the module multiplex integration count is sequentially read from the module multiplex integration count table (step S2103), and it is determined whether the read module multiplex integration count is smaller than M2 (step S2104).
[0112]
If it is smaller (Step S2104: Y), the module multiplex integration count is set to the minimum module multiplex integration count (M2) (Step S2105), and it is determined whether the comparison has been completed for all the read module multiplex integration counts. (Step S2106).
When the comparison is completed (step S2106: Y), the module indicating the module multiplex integration count value set to the minimum module multiplex integration count (M2) is determined as the output target module (step S2107), and the information in the management information table is determined. By referring to the determined output target module, the next section of the output target section notified immediately before to the data output unit 105 (when the section notified immediately before does not exist or the section notified immediately before is the last section) Determines the first section in the output target module) as the output target section (step S2108), determines the first material packet data in the output target section as the output target packet data (step S2109), and determines the determined output target packet data. The module multiplex count value of the module is added to the module multiplex count of the output target module (step S2111), and the module multiplex count of the module in the module multiplex count table is added. The updated value is updated (step S2112).
[0113]
If it is not the last packet data in step 2101 (step S2101: N), in the material packet data belonging to the output target PID, the material packet data next to the material packet data notified immediately before is determined as the output target packet data (step S2110). ), Notify the data output unit 105, add the module multiplex count value of the module to the module multiplex accumulation count of the output target module to which the output target packet data belongs (step S2111), and The value is updated to the value obtained by adding the module multiplex integration count (step S2112), and the same processing as step S1008 in FIG. 10 is performed.
[0114]
If it is not small in step S2104 (step S2104: N), the process of step S2106 is performed.
If the comparison has not been completed in step S2106 (step S2106: N), the processing in steps S2103 to S2106 is repeated.
In the above, in the material packet data output process performed by the data output unit 105 having received the notification of the determined output target packet data, the process in step 2401 is a process of reading the notified output target packet data. The process is the same as the process illustrated in FIG. 25 except that the process in S2402 is a process of writing the read output target packet data to the memory.
[0115]
【The invention's effect】
The present invention provides a data stream including a plurality of types of repeat data that are repeatedly transmitted.OutsideAnd repeat data received fromapparatusA data transfer device for transferring to a storage device having a storage area for storing a plurality of types of repeat data;OutsideExtracting means for extracting each type of repeat data from the data stream received from the storage device, storing means for storing each extracted repeat data in the storage area, and the composition ratio between the types of repeat data to be output per fixed time And a data output unit that reads out each of the plurality of types of repeat data stored in the storage unit and outputs the read data at the determined configuration ratio.
[0116]
Also, the respective repeat data is transmitted by a carousel transmission method.At least oneThe data stream may be composed of packet data, and the data stream may be a transport stream. The present invention also provides a data stream including a plurality of types of repeat data that are repeatedly transmitted.OutsideAnd repeat data received fromapparatusTo a data transfer device having a storage area for storing a plurality of types of repeat data,OutsideAn extracting step of extracting each type of repeat data from the data stream received from the storage device, a storing step of storing each extracted repeat data in the storage area, and a composition ratio between types of repeat data to be output per fixed time. And a data output step of reading each of the plurality of types of repeat data stored in the storage means and outputting the read data at the determined composition ratio.
[0117]
The present invention also provides a data stream including a plurality of types of repeat data that are repeatedly transmitted.OutsideAnd repeat data received fromapparatusAnd a computer-readable recording medium recording a program used in a data transfer device having a storage area for storing a plurality of types of repeat data.OutsideAn extracting step of extracting each type of repeat data from the data stream received from the storage device, a storing step of storing each extracted repeat data in the storage area, and a composition ratio between types of repeat data to be output per fixed time. And a data output step of reading each of the plurality of types of repeat data stored in the storage means and outputting the read data at the determined composition ratio.
[0118]
The present invention also provides a data stream including a plurality of types of repeat data that are repeatedly transmitted.OutsideAnd repeat data received fromapparatusA program used in a data transfer device having a storage area for storing a plurality of types of repeat data.OutsideAn extracting step of extracting each type of repeat data from the data stream received from the storage device, a storing step of storing each extracted repeat data in the storage area, and a composition ratio between types of repeat data to be output per fixed time. And a data output step of reading each of the plurality of types of repeat data stored in the storage means and outputting the read data at the determined composition ratio.
[0119]
With this configuration, even when the data band usable by the local station is larger than the data band usable by the key station, the stored repeat data is read out a required number of times according to the band difference, thereby repeatedly transmitting the repeat data. Since it is possible to adjust the speed at which data is transmitted, it is possible to transfer each repeat data at a predetermined configuration ratio with high transmission efficiency by making the most of the available data band.
[0120]
Here, the storage area includes the plurality of types ofStore repeat dataThe storage means may be configured to overwrite the corresponding assigned storage area each time the repeat data is extracted. With this configuration, the amount of memory for storing the material data can be reduced, and the latest material data can always be stored. Therefore, even when the content of the material data is updated, The material data having the updated content can be broadcast and provided to the viewer's receiving device.
Here, the storage area is configured by each assigned storage area for storing the plurality of types of repeat data, and the contents of the plurality of types of repeat data are updated at a predetermined timing and updated. Each type of repeat data includes update information indicating that the content has been updated, and the storing means stores the first extracted repeat data of each type in the corresponding assigned storage area, and thereafter extracts Only when the update information is included in the respective types of repeat data, the type of repeat data may be overwritten on the corresponding assigned storage area. With this configuration, the latest repeat data can always be stored, so even when the content of the material data is updated, the updated material data is quickly transferred to the viewer's receiving device. Can be provided.
[0121]
Here, each of the plurality of types of repeat data isAt least oneThe data configuration ratio determining means includes packet data, and the data configuration ratio determining means includes, for each of the repeat data, counting means for counting the number of packet data constituting the repeat data extracted per predetermined time. The means may determine the composition ratio based on a ratio of each count number between types of each repeat data.
[0122]
With this configuration, each repeat data can be transferred with the same composition ratio as that of each repeat data transmitted from the key station, without causing a difference in the content of the material data between the key station and the local station. It is possible to provide a viewer with a data broadcasting program having a uniform content, and the composition ratio not intended by the key station side (for example, if the repeat data constituting the menu screen for the user to select the data broadcasting program is extremely It is possible to prevent the material data from being broadcast to the viewer's receiving device at a low composition ratio).
[0123]
Also, when the data bandwidth that can be used by the local station is larger than the data bandwidth that can be used by the key station, each repeat data can be transferred at a bit rate faster than that of the key station. A desired data broadcast program can be viewed in the waiting time.
Here, the data stream further includes output information data having output ratio information indicating a composition ratio between types of each of the repeated data to be output, and the extracting unit further extracts the output information data, The ratio determining means may determine the component ratio based on output ratio information included in the extracted output information data.
[0124]
Further, the data stream further includes instruction information data having instruction information for indicating a composition ratio between types of each repeat data to be output per fixed time and a total output bit rate, and the extracting unit further includes: Instruction information data is extracted from the data stream, the data composition ratio determining means determines the composition ratio based on the instruction information included in the extracted instruction information data, and the output means stores the instruction information in the storage means. The plurality of types of stored repeat data may be output at a total output bit rate indicated by the instruction information.
[0125]
With this configuration, it is possible to adjust the composition ratio of each repeat data to be transferred from the local station on the key station side in advance, so that the repeat data of each repeat data can be adjusted according to the viewing frequency of the viewer of the data broadcast program of the local station. The composition ratio can be changed, and the frequently viewed repeat data can be transferred more frequently. Here, the output means includes an output rate instruction information receiving means for receiving an input of instruction information for instructing a total output bit rate and a composition ratio between types of repeat data in a data stream to be output in a fixed time. The data configuration ratio determining unit has an instruction information storage unit having a storage area for recording instruction information, and stores the received instruction information in theMemoryAn instruction information recording unit that records the composition ratio based on the recorded instruction information; and the output unit stores the instruction ratio stored in the storage unit. The plurality of types of repeat data may be output at the total output bit rate indicated by the instruction information.Further, the output means includes a total output bit rate, a minimum output bit rate and a surplus output bit rate that are each output bit rate obtained by dividing the total output bit rate into two at a predetermined ratio, and the surplus output bit rate. Output rate instruction information receiving means for receiving an input of instruction information for instructing an allocation ratio for allocating for each type of repeat data, and the data configuration ratio determining means for recording the instruction information Instruction information storage means having a storage area, and instruction information recording means for recording the received instruction information in the storage area, the data configuration ratio determining means, the minimum output bit rate indicated by the instruction information The distribution minimum output bit rate, which is the output bit rate distributed for each type of repeat data, and the surplus bit rate indicated by the instruction information are used as the support bits. A distribution bit rate that is an output bit rate obtained by adding a distribution surplus output bit rate that is an output bit rate distributed for each type of repeat data according to the distribution ratio indicated by the information is determined for each type of repeat data. The composition ratio is determined according to the ratio between the types of the respective pieces of repeat data of the determined distribution bit rate, and the output unit indicates each of the plurality of types of repeat data stored in the storage unit by the instruction information. It may be output at the total output bit rate.
[0126]
With this configuration, the operator of the local station can instruct the composition ratio and transfer speed of each repeat data to be broadcast to the viewer's receiving device at any time according to the situation, so that the viewer's needs can be specified according to the time zone. By selecting higher information and increasing the transfer frequency of the repeat data that constitutes the selected information preferentially, or by increasing the transfer speed of the material data during the time period when the audience rate of the data broadcast program is high, It is possible to provide a detailed information service to the viewer.
[0127]
Here, each of the repeat data is composed of a plurality of packet data transmitted by a carousel transmission method, the data stream is a transport stream, and each of the repeat data has a different PID for each type of repeat data. The storage unit stores at least one set of a first PID for identifying a PID to be rewritten and a second PID for identifying a rewritten PID, and the data output unit should read the set. Determining means for determining whether or not the PID of each piece of repeat data matches any of the first PIDs stored in the storage means; and, if so, changing the PID of the read repeat data to the first PID which matches the PID. PID rewriting means for rewriting to a second PID paired with
[0128]
With this configuration, the PID of the packet data of the specific repeat data can be rewritten to a predetermined PID and the packet data can be transferred, so that the PID assigned to the packet data transmitted from the key station is already in the local station, It is possible to solve the problem when the packet data is used as the PID of another type of packet data. The present invention also provides a first type data stream including a plurality of types of repeat data repeatedly transmitted,Dummy packet dataAnd a second class data stream containingFrom outsideReceive and repeat data lowerapparatusA data transfer device for transferring data to each of the plurality of types of repeat data, wherein the data transfer device includes a storage unit having a storage area for storing the plurality of types of repeat data; Extracting means for extracting the plurality of types of repeat data from the first type data stream, storing means for storing the extracted plurality of types of repeat data in the storage means, and receiving the second type data stream from the received second type data stream.For dummyDetecting means for detecting packet data, output data selecting means for sequentially selecting the type of repeat data to be output,For dummyWhen the packet data is detected, the repeat packet data constituting the sequentially selected type of repeat data is read out from the storage means, and is detected in the received second type packet data stream.For dummyAn output unit that replaces the packet data and outputs the data, and when the packet data is not detected, an output unit that directly outputs the received second-class data stream.
[0129]
Also, the respective repeat data is transmitted by a carousel transmission method.At least oneThe first and second type data streams may be configured as transport streams. The present invention also provides a first type data stream including a plurality of types of repeat data that are repeatedly transmitted,Dummy packet dataAnd a second class data stream containingOutsideAnd repeat data received fromapparatusTo a data transfer device having a storage area for storing the plurality of types of repeat data, wherein each of the repeat data is composed of a plurality of repeat packet data. Extracting the plurality of types of repeat data from the received first type data stream, storing the extracted plurality of types of repeat data in the storage area, and receiving the second type data stream from the received second type data stream.For dummyA detection step of detecting packet data; an output data selection step of sequentially selecting a type of repeat data to be output;For dummyWhen the packet data is detected, the repeat packet data constituting the sequentially selected type of repeat data is read out from the storage means, and is detected in the received second type packet data stream.For dummyAn output step of replacing the packet data with the packet data and outputting the packet data when the packet data is not detected, and outputting the received second type data stream as it is may be included.
[0130]
The present invention also provides a first type data stream including a plurality of types of repeat data that are repeatedly transmitted,Dummy packet dataAnd a second class data stream containingOutsideAnd repeat data received fromapparatusTo a computer-readable recording medium recording a program used in a data transfer device having a storage area for storing the plurality of types of repeat data, wherein each of the repeat data isAt least oneAn extracting step of extracting the plurality of types of repeat data from a received first type data stream; and a storing step of storing the extracted plurality of types of repeat data in the storage area. And from the received second type data streamFor dummyA detection step of detecting packet data, an output data selection step of sequentially selecting a type of repeat data to be output,For dummyWhen the packet data is detected, the repeat packet data constituting the sequentially selected type of repeat data is read out from the storage means, and is detected in the received second type packet data stream.For dummyAn output step of replacing the packet data with the packet data and outputting the packet data when the packet data is not detected, and outputting the received second type data stream as it is may be included.
[0131]
The present invention also provides a first type data stream including a plurality of types of repeat data that are repeatedly transmitted,Dummy packet dataAnd a data transfer device having a storage area for storing the plurality of types of repeat data, wherein each of the repeat data includes:At least oneAn extracting step of extracting the plurality of types of repeat data from a received first type data stream; and a storing step of storing the extracted plurality of types of repeat data in the storage area. And from the received second type data streamFor dummyA detection step of detecting packet data; an output data selection step of sequentially selecting a type of repeat data to be output;For dummyWhen the packet data is detected, the repeat packet data constituting the sequentially selected type of repeat data is read out from the storage means, and is detected in the received second type packet data stream.For dummyAn output step of replacing the packet data with the packet data and outputting the packet data when the packet data is not detected, and outputting the received second type data stream as it is may be included.
[0132]
With this configuration,The dummy packet data isSince the data is transferred by being replaced with the packet data constituting the sequentially selected repeat data, the data band can be effectively utilized and the data transmission efficiency can be improved without transferring useless data. Here, the storage area includes the plurality of types ofRepeat dataThe storage unit may be configured with each assigned storage area for storing, and the storage unit may overwrite the corresponding assigned storage area each time the repeat data is extracted.
[0133]
With this configuration, the amount of memory for storing the material data can be reduced, and the latest material data can always be stored. Therefore, even when the content of the material data is updated, The updated material data can be transferred and provided to the viewer's receiving device. here,The storage area is configured from each assigned storage area for storing the plurality of types of repeat data, and the contents of the plurality of types of repeat data are updated at a predetermined timing, and the updated types of the respective types of repeat data are updated. The repeat data includes update information indicating that the content has been updated, and the storage unit stores the first extracted repeat data in each of the assigned storage areas corresponding thereto, and thereafter stores the respective extracted repeat data. Only when the type of repeat data includes the update information, the type of repeat data may be overwritten on the corresponding assigned storage area. With this configuration, the latest repeat data can always be stored, so even when the content of the material data is updated, the updated material data is quickly transferred to the viewer's receiving device. Can be provided.Here, the output data selection means is a counting means for counting, for each of the repeat data, the number of repeat packet data constituting the repeat data extracted per predetermined time.HasThe output data selection means may sequentially select types of repeat data to be output in accordance with a priority order determined based on a ratio of each count number among the types of repeat data.
[0134]
With this configuration, each repeat data can be transferred with the same composition ratio as that of each repeat data transmitted from the key station, without causing a difference in the content of the material data between the key station and the local station. A data broadcasting program having a uniform content can be provided to the viewer, and a composition ratio not intended by the key station side (for example, a composition ratio of a repeat data constituting a menu screen for a user to select a data broadcasting program) Can be prevented from being broadcast to the viewer's receiving device with an extremely low composition ratio.
[0135]
Here, each of the repeat data is transmitted by a carousel transmission method.At least oneThe first and second class data streams are transport streams; the second class data stream includes packet data having a plurality of types of PIDs including a first PID; Stores a second PID, the detecting means further detects packet data having a first PID from the received second type data stream, and the output means further comprises, when detecting the first PID, The second PID may be read, the PID of the detected packet data may be rewritten to the read PID, and the packet data may be output.
In addition, the first PID May be dummy packet data.
[0136]
With this configuration, the PID of the specific packet data can be rewritten to a predetermined PID and the packet data can be transferred. Can be eliminated when the packet data is used as the PID of the packet data.
[Brief description of the drawings]
FIG. 1 shows a configuration of a main part of a data transfer device 100 according to an embodiment of the present invention.
FIG. 2 illustrates a format of material data transmitted from a broadcasting station by a DSM-CC (Digital Storage Media Command and Control) carousel transmission method.
FIG. 3 is a diagram showing a relationship among packet data, sections, modules, carousels, and material data.
FIG. 4 is a diagram schematically illustrating an example of a data structure of material data stored in a data storage unit 101;
FIG. 5 is a table showing an example of the number of input packet data for each module ID counted by the extracted data counting unit 103;
FIG. 6 is a table showing an example of a management information table.
FIG. 7 shows parameters used by the data configuration ratio determination unit 104 to perform a data configuration ratio determination process.
FIG. 8 is an example of a table showing a state of a PID multiplex integration count held by a data configuration ratio determining unit 104;
FIG. 9 shows an example of a module multiplex integration count table indicating the state of the module multiplex integration count held by the data configuration ratio determining unit 104.
FIG. 10 is a flowchart illustrating an output target section determination process performed by a data configuration ratio determination unit 104;
FIG. 11 is a flowchart showing the contents of processing in step 1007 performed by the data composition ratio determining unit 104;
FIG. 12 shows a configuration of a main part of the data transfer device 200.
FIG. 13 shows an example of the content of an output bit rate information rate.
14 shows a configuration of a main part of the data transfer device 300. FIG.
FIG. 15 is a table showing an example of instruction information.
16 shows a configuration of a main part of the data transfer device 400. FIG.
17 shows a configuration of a main part of the data transfer device 500. FIG.
FIG. 18 shows an example of a data stream of AV packet data received by the video data acquisition unit 507.
FIG. 19 illustrates an example of a data stream that the data output unit 505 receives from the video data extraction unit 507 and receives the input of the AV packet data illustrated in FIG.
FIG. 20 is a flowchart illustrating an operation of a packet data selection process performed by a data output unit 505.
21 shows a configuration of a main part of the data transfer device 600. FIG.
FIG. 22 is a flowchart illustrating an operation of a data configuration ratio determination process.
FIG. 23 is a flowchart showing the first half of an output target packet determination process performed by the data configuration ratio determination unit 104;
FIG. 24 is a flowchart illustrating the latter half of the output target packet determination process performed by the data configuration ratio determination unit 104.
FIG. 25 is a flowchart showing material packet data output processing performed by the data output unit 105.
[Explanation of symbols]
100, 200, 300, 400, 500, 600 Data transfer device
101 Data storage unit
102 Data extractor
103 Extracted data count section
104 Data composition ratio determination unit
105, 505, 605 Data output unit
106 Data output rate storage unit
203 Extracted data analysis unit
303 Data output rate indicator
306 instruction information storage unit
403 Instruction information analysis unit
507 Video data acquisition unit
508 Null packet detector

Claims (16)

A data stream that is repeatedly transmitted and includes a plurality of types of repeat data classified by an identifier included in the repeat data and that is composed of at least one or more packet data is received from an upper station, and a repeat is received. A data transfer device for transferring data to a lower station ,
Storage means having a storage area for storing the plurality of types of repeat data,
Extracting means for extracting each type of repeat data based on the identifier from the data stream received from the upper station each time reception is performed,
Storage means for storing each type of extracted repeat data in the storage area;
Data configuration ratio determining means for determining the ratio of the number of outputs among the types of the plurality of types of repeat data to be output per fixed time,
Packet data constituting each type of repeat data is sequentially read from the storage area and output so that the ratio between the number of times of reading each type of repeat data stored in the storage area becomes the determined ratio. Data output means and
With
Wherein the data structure ratio determination means, wherein for each type of repeat data includes a count means for counting the number of packet data constituting the type of repeat data extracted per a predetermined time,
The data transfer ratio determining means determines the ratio of each count number among the respective types of repeat data as the ratio of the number of outputs between the plurality of types of repeat data. apparatus. The data transfer device further receives, from outside, a dummy data stream that is a data stream composed of dummy packet data and non-dummy packet data,
The data output unit has a detection unit that detects dummy packet data from the received dummy data stream,
The data output means, when detecting the dummy packet data, replaces the detected dummy packet data with the packet data sequentially read out, and outputs the data.
If the dummy packet data is not detected, the received non-dummy packet data is output as it is.
The data transfer device according to claim 1, wherein: A repeat data that is repeatedly transmitted, the repeat data
A data transfer device that receives a data stream including a plurality of types of repeat data classified by an identifier included from an upper station and transfers the repeat data to a lower station ,
Storage means having a storage area for storing the plurality of types of repeat data,
Extracting means for extracting each type of repeat data based on the identifier from the data stream received from the upper station ,
Storage means for storing each type of extracted repeat data in the storage area;
Data configuration ratio determining means for determining the ratio of the number of outputs among the types of the plurality of types of repeat data to be output per fixed time,
Data output means for reading out each type of repeat data stored in the storage area and outputting at the determined ratio
With
The data stream further includes output information data indicating the number of outputs between types of the plurality of types of repeat data ,
The extracting means further extracts the output information data,
Wherein the data structure ratio determination means, contained in the extracted output information data, based on the number of output between the plurality of types of types of repeat data, data transfer, characterized in <br/> determining the ratio apparatus. A repeat data that is repeatedly transmitted, the repeat data
A data transfer device that receives a data stream including a plurality of types of repeat data classified by an identifier included from an upper station and transfers the repeat data to a lower station ,
Storage means having a storage area for storing the plurality of types of repeat data,
Extracting means for extracting each type of repeat data based on the identifier from the data stream received from the upper station ,
Storage means for storing extraction each type of repeat data issued in the storage area,
Data configuration ratio determining means for determining the ratio of the number of outputs among the types of the plurality of types of repeat data to be output per fixed time,
Data output means for reading out each type of repeat data stored in the storage means, and outputting at the determined ratio
With
The data stream further includes instruction information data having instruction information for indicating an allocation ratio of an output bit rate and a total output bit rate among the types of the plurality of types of repeat data ,
The extraction means further extracts instruction information data from the data stream,
Wherein the data structure ratio determination means, based on the instruction information contained in the instruction information data issued extracted to determine the ratio,
The data transfer device, wherein the data output unit outputs the plurality of types of repeat data stored in the storage unit at a total output bit rate indicated by the instruction information . The instruction information data further includes instruction information for indicating a minimum output bit rate and a surplus output bit rate in which the total output bit rate is allocated to each of the two output bit rates,
  The data configuration ratio determining means distributes the minimum output bit rate for each of the plurality of types of repeat data based on the instruction information included in the extracted instruction information data, and further calculates the surplus output bit rate. The plurality of types of repeat data are allocated according to the allocation ratio, and the ratio of the total of two allocated output bit rates among the plurality of types of repeat data is determined between the types of the plurality of types of repeat data. Is determined as the ratio of the number of outputs in
The data transfer device according to claim 4, wherein: Each type of repeat data is composed of at least one packet data transmitted by a carousel transmission method,
The data transfer device according to claim 1 , wherein the data stream is a transport stream. Each type of repeat data has a different PID for each type of repeat data as the identifier ,
Wherein the data transfer apparatus comprises a PID storage means for storing at least one set or more sets of the first 2PID a first 1PID a predetermined PID is a specific PID of said different respective PID,
Determining means for determining whether or not the PID of each piece of repeat data to be read matches one of the first PIDs stored in the PID storage means;
7. The data transfer device according to claim 6, further comprising: PID rewriting means for rewriting the PID of the read repeat data to a second PID paired with the first PID that matches the PID, when the data matches.   Repeatedly transmitted, composed of at least one packet data
Receiving a data stream including a plurality of types of repeat data classified by an identifier included in the repeat data from an upper station, transferring the repeat data to a lower station, and repeating the plurality of types of repeat data. A data transfer method in a data transfer device having a storage area for storing data,
Each type of repeat data is determined from the data stream received from the upper station based on the identifier. An extraction step for extracting data each time data is received;
A storage step of storing each type of extracted repeat data in the storage area,
A data composition ratio determining step of determining a ratio of the number of outputs between the types of the plurality of types of repeat data to be output per fixed time,
Packet data constituting each type of repeat data is sequentially read from the storage area and output so that the ratio between the number of times of reading each type of repeat data stored in the storage area becomes the determined ratio. Data output step
Including
The data configuration ratio determining step, for each type of repeat data, has a counting step of counting the number of packet data constituting the type of repeat data extracted per predetermined time,
The data composition ratio determining step determines a ratio of each count number among the respective types of repeat data as a ratio of the number of outputs between the plurality of types of repeat data.
A data transfer method, characterized in that:   A data stream that is repeatedly transmitted and includes a plurality of types of repeat data classified by an identifier included in the repeat data and that is composed of at least one or more packet data is received from an upper station, and a repeat is received. A computer-readable recording medium recording a program for transferring data to a lower station and causing a data transfer device having a storage area for storing the plurality of types of repeat data to execute a data transfer process,
  The data transfer process includes:
An extraction step of extracting each type of repeat data based on the identifier from the data stream received from the upper station each time reception is performed,
A storage step of storing each type of extracted repeat data in the storage area,
A data composition ratio determining step of determining a ratio of the number of outputs between the types of the plurality of types of repeat data to be output per fixed time,
Packet data constituting each type of repeat data is sequentially read from the storage area and output so that the ratio between the number of times of reading each type of repeat data stored in the storage area becomes the determined ratio. Data output step
Including
The data configuration ratio determining step, for each type of repeat data, has a counting step of counting the number of packet data constituting the type of repeat data extracted per predetermined time,
The data composition ratio determining step determines a ratio of each count number among the respective types of repeat data as a ratio of the number of outputs between the plurality of types of repeat data.
A computer-readable recording medium characterized by the above-mentioned.   A data stream that is repeatedly transmitted and includes a plurality of types of repeat data classified by an identifier included in the repeat data and that is composed of at least one or more packet data is received from an upper station, and a repeat is received. A program for transferring data to a lower station, and causing a data transfer device having a storage area for storing the plurality of types of repeat data to execute a data transfer process,
  The data transfer process includes:
An extraction step of extracting each type of repeat data based on the identifier from the data stream received from the upper station each time reception is performed,
A storage step of storing each type of extracted repeat data in the storage area,
A data composition ratio determining step of determining a ratio of the number of outputs between the types of the plurality of types of repeat data to be output per fixed time,
Packet data constituting each type of repeat data is sequentially read from the storage area and output so that the ratio between the number of times of reading each type of repeat data stored in the storage area becomes the determined ratio. Data output step
Including
The data configuration ratio determining step, for each type of repeat data, has a counting step of counting the number of packet data constituting the type of repeat data extracted per predetermined time,
The data composition ratio determining step determines a ratio of each count number among the respective types of repeat data as a ratio of the number of outputs between the plurality of types of repeat data.
A program characterized by the following.   Receiving a data stream including a plurality of types of repeat data, which is repeatedly transmitted and including a plurality of types of repeat data classified by identifiers included in the repeat data, transferring the repeat data to a lower station; A data transfer method in a data transfer device having a storage area for storing the repeat data of
An extracting step of extracting each type of repeat data based on the identifier from the data stream received from the upper station,
A storage step of storing each type of extracted repeat data in the storage area,
A data composition ratio determining step of determining a ratio of the number of outputs between the types of the plurality of types of repeat data to be output per fixed time,
A data output step of reading out each type of repeat data stored in the storage area and outputting at the determined ratio.
Including
The data stream further includes output information data indicating the number of outputs between types of the plurality of types of repeat data,
The extracting step further extracts the output information data,
The data composition ratio determining step determines the ratio based on the number of outputs among the plurality of types of repeat data included in the extracted output information data.
A data transfer method, characterized in that:   Receiving a data stream including a plurality of types of repeat data, which is repeatedly transmitted and including a plurality of types of repeat data classified by identifiers included in the repeat data, transferring the repeat data to a lower station; A recording medium recording a program for causing a data transfer device having a storage area for storing repeat data to execute a data transfer process,
  The data transfer process includes:
An extracting step of extracting each type of repeat data based on the identifier from the data stream received from the upper station,
A storage step of storing each type of extracted repeat data in the storage area,
A data composition ratio determining step of determining a ratio of the number of outputs between the types of the plurality of types of repeat data to be output per fixed time,
A data output step of reading out each type of repeat data stored in the storage area and outputting at the determined ratio.
Including
The data stream further includes output information data indicating the number of outputs between types of the plurality of types of repeat data,
The extracting step further extracts the output information data,
The data configuration ratio determining step determines the ratio based on the number of outputs among the plurality of types of repeat data included in the extracted output information data.
A computer-readable recording medium characterized by the above-mentioned.   Receiving a data stream including a plurality of types of repeat data, which is repeatedly transmitted and including a plurality of types of repeat data classified by identifiers included in the repeat data, transferring the repeat data to a lower station; A data transfer device having a storage area for storing the repeat data of A program for
  The data transfer process includes:
An extracting step of extracting each type of repeat data based on the identifier from the data stream received from the upper station,
A storage step of storing each type of extracted repeat data in the storage area,
A data composition ratio determining step of determining a ratio of the number of outputs between the types of the plurality of types of repeat data to be output per fixed time,
A data output step of reading out each type of repeat data stored in the storage area and outputting at the determined ratio.
Including
The data stream further includes output information data indicating the number of outputs between types of the plurality of types of repeat data,
The extracting step further extracts the output information data,
The data composition ratio determining step determines the ratio based on the number of outputs among the plurality of types of repeat data included in the extracted output information data.
A program characterized by the following.   Receiving a data stream including a plurality of types of repeat data, which is repeatedly transmitted and including a plurality of types of repeat data classified by identifiers included in the repeat data, transferring the repeat data to a lower station; A data transfer method in a data transfer device having a storage area for storing the repeat data of
An extracting step of extracting each type of repeat data based on the identifier from the data stream received from the upper station,
A storage step of storing each type of extracted repeat data in the storage area,
A data composition ratio determining step of determining a ratio of the number of outputs between the types of the plurality of types of repeat data to be output per fixed time,
A data output step of reading out each type of repeat data stored in the storage area and outputting at the determined ratio.
Including
The data stream further includes instruction information data having instruction information for indicating a distribution ratio of an output bit rate and a total output bit rate among the plurality of types of repeat data,
The extracting step further extracts instruction information data from the data stream;
The data configuration ratio determining step determines the ratio based on the instruction information included in the extracted instruction information data,
The output step outputs the plurality of types of repeat data stored in the storage area at a total output bit rate indicated by the instruction information.
A data transfer method, characterized in that: Receiving a data stream including a plurality of types of repeat data, which is repeatedly transmitted and including a plurality of types of repeat data classified by identifiers included in the repeat data, transferring the repeat data to a lower station; A computer-readable recording medium recording a program for causing a data transfer device having a storage area for storing the repeat data to execute a data transfer process,
  The data transfer process includes:
An extracting step of extracting each type of repeat data based on the identifier from the data stream received from the upper station,
A storage step of storing each type of extracted repeat data in the storage area,
A data composition ratio determining step of determining a ratio of the number of outputs between the types of the plurality of types of repeat data to be output per fixed time,
A data output step of reading out each type of repeat data stored in the storage area and outputting at the determined ratio.
Including
The data stream further includes instruction information data having instruction information for indicating a distribution ratio of an output bit rate and a total output bit rate among the plurality of types of repeat data,
The extracting step further extracts instruction information data from the data stream;
The data configuration ratio determining step, based on the instruction information included in the extracted instruction information data, determines the ratio,
The data output step outputs the plurality of types of repeat data stored in the storage area at a total output bit rate indicated by the instruction information.
A computer-readable recording medium characterized by the above-mentioned.   Receiving a data stream including a plurality of types of repeat data, which is repeatedly transmitted and including a plurality of types of repeat data classified by identifiers included in the repeat data, transferring the repeat data to a lower station; A program for causing a data transfer device having a storage area for storing repeat data to execute a data transfer process,
  The data transfer process includes:
An extracting step of extracting each type of repeat data based on the identifier from the data stream received from the upper station,
A storage step of storing each type of extracted repeat data in the storage area,
A data composition ratio determining step of determining a ratio of the number of outputs between the types of the plurality of types of repeat data to be output per fixed time,
A data output step of reading out each type of repeat data stored in the storage area and outputting at the determined ratio.
Including
The data stream further includes instruction information data having instruction information for indicating a distribution ratio of an output bit rate and a total output bit rate among the plurality of types of repeat data,
The extracting step further extracts instruction information data from the data stream;
The data configuration ratio determining step determines the ratio based on the instruction information included in the extracted instruction information data,
The data output step outputs the plurality of types of repeat data stored in the storage area at a total output bit rate indicated by the instruction information.
A program characterized by the following.

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