JP2003110958A - Information processing apparatus and method - Google Patents

Abstract

(57) [Summary] [Problem] To reduce the load required for processing section data. [Solution] EMM (Entitlement Management Message)
The data ID extraction filter 81 includes an EMM section ID extraction filter 81A and an EMM common message ID extraction filter 81.
A and an EMM individual message ID extraction filter 81A. These filters allow tables
The ID and the extension table ID are extracted, and the type of the EMM data is identified. And the EMM section of the EMM data
The EMM section buffer 91A stores the EMM common message in the EMM common message buffer 91B, and the EMM individual message is stored in the EMM individual message buffer 91C. When processing predetermined EMM data, the host CPU (not shown) reads the EMM data from a buffer in which the EMM data is stored.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information processing apparatus and method, and more particularly to an information processing apparatus and method that can reduce the load required for processing section data.

[0002]

2. Description of the Related Art In recent years, MPEG (Moving Picture Experts Gr
oup) Using high efficiency coding technology such as 2 system, for example,
2. Description of the Related Art Digital television broadcasting, which compresses television program data including video data and audio data and broadcasts via satellite, is becoming popular.

In digital television broadcasting,
A viewer can select a program by operating an STB (Set Top Box), which is a program reproducing device, and displaying an EPG (Electronic Program Guide) or the like.

By the way, a PSI (Program S
Unlike video data and audio data, the pecific information) is transmitted in a data structure called a "section", and STB CPU (Central Processing Uni
In t), the transmitted section data (data having a section structure) is stored in a predetermined buffer, and for example, the stored data is read and processed according to an instruction from the user.

FIG. 1 is a block diagram showing a configuration example of a demultiplexer provided in a conventional STB.

The received signal selected and obtained by a tuner (not shown) is subjected to demodulation processing, error correction processing, etc., and then supplied to the demultiplexer 1 as a transport stream (TS) to the host CPU bus. 3, and various processes are performed based on the instruction from the host CPU 2 notified via the host CPU interface 12.

The TS (Transport Stream) header analysis unit 11 analyzes the header after confirming whether the transport packets constituting the transport stream supplied from the tuner conform to the standard. The TS header analysis unit 11 is described in the header
Transport packets that store video data or audio data based on PID (packet ID)
The section data analysis unit 14 outputs the transport packet that is output to the PES analysis unit 13 and stores the section data.
Output to.

The PES analysis section 13 analyzes the PES header of the supplied video data and, via the video decoder interface 15, PES or ES (Elementary Strut).
The video data of (eam) is output to a video decoder (not shown). Similarly, the PES analysis unit 13 analyzes the PES header of the supplied audio data, and outputs the PES or ES audio data to an audio decoder (not shown) via the audio decoder interface 16.

In the video decoder or the audio decoder, the supplied data is reproduced, and the acquired video signal is displayed on the display unit (not shown).
A voice signal is output from a speaker (not shown).

On the other hand, the section data analysis unit 14 confirms the correctness of the supplied section data,
The section data is stored in a predetermined buffer instructed by the TS header analysis unit 11.

The processing of the conventional demultiplexer 1 shown in FIG. 1 for storing the section data in the memory will be described with reference to the flowchart of FIG.

The TS header analysis section 11 refers to the PID of the supplied transport packet in step S1, and proceeds to step S2. The TS header analysis unit 11
In step S2, it is determined whether or not the supplied transport packet is a packet including section data based on the referenced PID. If it is determined that the transport packet is not a packet including section data, the process ends. As described above, transport packets that do not include section data, that is, transport packets that include video data and audio data, are
It is supplied to the analysis unit 13, and thereafter, predetermined processing is performed.

On the other hand, the TS header analysis unit 11 performs step S
When it is determined in 2 that the supplied transport packet is a packet including section data, the process proceeds to step S3, where a buffer for storing the section data is set based on the PID, and the transport packet is sectioned. It is supplied to the data analysis unit 14.

In step S4, the section data analysis unit 14 compares the data set by the host CPU 2 with the supplied section data, and in step S5, when the identity is confirmed, step S6
Then, the section data is stored in the set buffer. That is, the section data is stored in the same buffer for each set PID.

Therefore, an EMM (Entitlement Management Message) is mainly used to transmit information such as the contents of contracts for pay broadcasting.
The data is stored in the same buffer because the same PID is set for all EMM data of any content, regardless of the described content or multiple types of uses. Will be.

Next, referring to the flowchart of FIG.
The processing of the host CPU 2 that reads and processes EMM data stored in a predetermined buffer will be described.

In step S21, the host CPU 2
When detecting an interrupt request instructing acquisition of EMM data, the process proceeds to step S22, and the EMM data is read from the buffer set for the EMM data. As described above, since section data such as EMM data has a buffer set for each PID, the host CPU 2 identifies and stores the buffer based on the PID set for the EMM data. Read the EMM data.

Then, in step S23, the host
The CPU 2 extracts the table ID of the read EMM data and the extension table ID. EMM data is table ID,
The described contents can be identified based on the extension table ID.

The host CPU 2 proceeds to step S24,
Based on the extracted table ID and extension table ID, it is determined whether the read EMM data is an EMM section. Details of types of EMM data will be described later.

When it is determined in step S24 that the read EMM data is the EMM section, the host CPU 2 proceeds to step S25, executes a predetermined process based on the EMM section, and ends the process.

On the other hand, when the host CPU 2 determines in step S24 that the EMM data read from the buffer is not the EMM section, it proceeds to step S26 and then determines whether the EMM data is an EMM common message. Judgment is made based on the extracted table ID and extension table ID.

When it is determined in step S26 that the read EMM data is the EMM common message, the host CPU 2 proceeds to step S27 and performs a predetermined process based on the EMM common message.

When the host CPU 2 determines in step S26 that the EMM data read from the buffer is not an EMM common message, the host CPU 2 proceeds to step S28 and then determines whether the EMM data is an EMM individual message. judge.

When it is determined in step S28 that the read EMM data is the EMM individual message, the host CPU 2 proceeds to step S29 to perform a predetermined process based on the EMM individual message, while if the EMM data is not the EMM individual message. If it is determined, the process is terminated.

By the above processing, the host CPU 2
Can read the section data based on the PID when detecting an interrupt request for processing the section data (EMM data).

[0026]

However, as described above, when the section data is stored in the same buffer for each set PID,
There is a problem that the processing load of the host CPU 2 increases depending on the data to be read.

For example, as described above, when the EMM data stored in the same buffer is read because the PIDs are the same even though there are a plurality of contents described, the host CPU 2 uses the PIDs. Specify the buffer based on the above, read the stored data, and then extract the table ID and extended table ID of the read data to check which content the read data represents. There is a need to.

That is, in FIG. 3, step S23.
After extracting the table ID of the
There is a problem in that it is necessary to perform the determination processing in step 4, step S26, and step S28, and these processing are factors that increase the processing load of the host CPU 2.

The present invention has been made in view of such a situation, and a load required for processing section data stored in the same buffer despite the presence of plural kinds of data such as EMM data. This is to reduce the above.

[0030]

According to the information processing apparatus of the present invention, the analysis means for analyzing the identification information of the transport packets constituting the transport stream and the identification information analyzed by the analysis means have the same identification information. Is set, and when the table identification information different for each content is related to the transport packet including the section data further set, the extraction means for extracting the table identification information set in the section data,
Based on the table identification information extracted by the extraction means, a storage means for storing the section data in a buffer corresponding to the content, and a storage means for reading out the section data representing a predetermined content from a plurality of contents , And reading means for reading out the section data representing the content from the buffer in which the section data representing the content is stored.

The section data can be EMM data.

The extraction means further extracts the extension table identification information set in the section data, and the storage means extracts the section data based on the table identification information and the extension table identification information extracted by the extraction means. It can be stored in a buffer according to the content.

According to the information processing method of the present invention, the same identification information is set in the analysis step of analyzing the identification information of the transport packets forming the transport stream and the identification information analyzed by the processing of the analysis step.
And, when the table identification information different for each content relates to the transport packet including the section data further set, an extraction step of extracting the table identification information set in the section data,
A storage step of storing the section data in a buffer according to the content based on the table identification information extracted by the processing of the extraction step, and a storage step when the section data representing a predetermined content of the plurality of contents is read out. The step of reading out the section data representing the content from the buffer in which the section data representing the content is stored by the processing of the step.

In the information processing apparatus and method of the present invention, the identification information of the transport packets forming the transport stream is analyzed, the analyzed identification information is set to the same identification information, and the contents are set for each content. When the different table identification information relates to the transport packet including the section data in which the table data is further set, the table identification information set in the section data is extracted. Further, based on the extracted table identification information, the section data is stored in the buffer corresponding to the content, and when the section data representing a predetermined content among the plurality of content is read, the section data representing the content is The section data is read from the stored buffer.

[0035]

BEST MODE FOR CARRYING OUT THE INVENTION FIG. 4 shows an STB (Se to which the present invention is applied.
3 is a block diagram showing a configuration example of a t Top Box) 31. FIG.

Host CPU (Central Processing Unit) 41
Expands a control program stored in a ROM (Read Only Memory) 42 to a RAM (Random Access Memory) 43, and connects the STB 31 connected via a host CPU bus 46.
Control the operation of each part of.

The IC card interface 44 connected to the host CPU bus 46 allows the host CPU 41 to store the key (master key) stored in the IC card 45 when the user mounts the IC card 45, for example. Supply as appropriate.

The RF signal received by the antenna 47 is supplied to the tuner 48, where after a predetermined signal is selected, demodulation processing, error correction processing and the like are performed, and the RF signal is supplied to the demultiplexer 49 as a transport stream. To be done.

The demultiplexer 49 is the PID described in the header of the transport packet which constitutes the transport stream supplied from the tuner 48.
The data stored in the transport packet is identified based on (Packet ID), and PES or ES (Elemen
(tary stream) video data is output to the video decoder 50, and audio data is output to the audio decoder 51.

When a transport packet storing PSI (Program Specific Information) or the like having a section structure is supplied, the demultiplexer 49 stores it in the memory 52. Memory 52
The data having the section structure (hereinafter, simply referred to as section data) stored in is read by the host CPU 41 at a predetermined timing and subjected to a predetermined process.

When the video data is supplied from the demultiplexer 49, the video decoder 50, for example,
The video signal obtained by decompressing the data in MPEG (Moving Picture Experts Group) 2 format and performing digital-to-analog conversion etc. is a CRT (Cathode Ray Tube).
Display 5 consisting of LCD or LCD (Liquid Crystal Display)
Display in 3. On the other hand, when the audio data is supplied from the demultiplexer 49, the audio decoder 51 expands the data and outputs the obtained audio signal to the speaker 54.

FIG. 5 is a block diagram showing a detailed configuration example of the demultiplexer 49 shown in FIG.

The TS (transport stream) header analysis section 61 confirms whether the transport stream supplied from the tuner 48 conforms to the standard, and then analyzes the header. Then, the TS header analysis unit 61 PES (Packetized Elementary Stream) a transport packet storing video data or audio data based on the PID described in the header.
Output to the analysis unit 63.

The PES analysis section 63 analyzes the PES header of the supplied video data, and outputs the PES or ES video data to the video decoder 50 via the video decoder interface 65. Similarly, the PES analysis unit 63 analyzes the PES header of the supplied audio data, and outputs the PES or ES audio data to the audio decoder 51 via the audio decoder interface 66.

On the other hand, when the TS header analysis unit 61 determines that the section data is stored in the supplied transport packet, the TS header analysis unit 61 sets the buffer of the memory 52 for storing the section data to the PID, if necessary. Based on the setting, the transport packet is output to the section data analysis unit 64.

Further, the TS header analysis section 61 shows, in the supplied transport packet, an EMM (Entitlement Management) that represents information such as the contract content of pay broadcasting.
If it is determined that the section data with the same PID is stored regardless of the described contents or multiple uses such as Message) data, the section data is , Output to the filter that extracts the table ID etc. that identifies the described data (table).

In the example of FIG. 5, an EMM data ID extraction filter 81 for extracting the table ID and extension table ID of EMM data is provided in the section data analysis unit 64, and the EMM data acquired by the TS header analysis unit 61 is acquired. The data is supplied to the EMM data ID extraction filter 81.

FIG. 6 is a block diagram showing a more detailed configuration example of the section data analysis unit 64 and the like.

The EMM data ID extraction filter 81 filters the EMM data acquired and supplied by the TS header analysis unit 61, extracts the table ID and extension table ID set in the EMM data, and extracts the data. Identify the type.

FIG. 7 is a diagram showing the structure of basic section data. As shown in the figure, each section data has a table for identifying the section data.
The ID is described in the first block (field), and the extended table ID is described in the sixth block from the left.

In the example of FIG. 7, from the left, the table ID is represented by 8 bits, the section syntax instruction is represented by 1 bit, and the private indicator indicating the type of private data is represented by 1 bit. Is
It is said that the section length is represented by 12 bits with "11" sandwiched therebetween. In addition, next to the section length, the extension table ID is represented by 16 bits, with "11" sandwiched between
The version number of the table is represented by 5 bits, and the current / next instruction is represented by 1 bit. Further, the section number is represented by 8 bits, the final section number is represented by 8 bits, and then the section data itself is represented by a variable length, and in order to detect a data error in the last block. CRC (Cyclic R
edundancy check) is represented by 32 bits.

With such a configuration, for example, EMM data includes an EMM section, an EMM common message, and
EMM individual messages and three types of tables with different described contents and purposes are set, and these tables are stored in transport packets with the same PID and sent. .

The EMM section is a table that mainly transmits contract contents. Then, the host CPU 41 uses STB3
1 EMM section sent to 1 IC card 4
Identification is performed based on the card ID of No. 5, and the data is written in the IC card 45 so that the key stored in the IC card 45 is valid and the received predetermined program can be viewed. In the EMM section and the EMM individual message, the identification information indicating the transmission target of the data is 6
It is expressed in bytes.

The EMM common message represents a message sent from the broadcaster to all STBs in common, and, for example, sends an advance notice of a program.

The EMM individual message represents a message transmitted from the broadcaster to a specific STB, and the host CPU 41 identifies the EMM individual message transmitted to the STB 31 and acquires it. To do. For example, billing information and the like are notified by an EMM individual message.

Returning to the description of FIG. 6, the EMM data ID extraction unit 8
The type of EMM data identified by 1 is notified to the memory setting unit 82, and the buffer to be stored is set based on the type of EMM data. That is, the memory 52
The EMM data buffer 91 is provided with three buffers, which are stored in different buffers depending on the type of EMM data.

The EMM data comparison unit 83 determines the validity of the EMM data for which the buffer is set based on the data instructed by the host CPU 41, and determines that the EMM data is valid.
The M data is stored in a predetermined area of the EMM data buffer 91 according to the type of data. Specifically, the EMM data comparison unit 83 determines the validity by comparing the data from the beginning to 16 bytes of the supplied section data with the value instructed by the host CPU 41.

The data comparison unit 84 has a TS header analysis unit 61.
The legitimacy of the section data (section data other than EMM data) supplied from is confirmed, and the section data whose legitimacy has been confirmed is stored in a buffer provided for each PID. As shown in the figure, the memory 52 is provided with a buffer 92 for storing other section data in addition to the EMM data buffer 91 for storing EMM data described above. Further, a buffer 92A and a buffer 92B that are classified and stored for each section data in which the same PID is set are further prepared.

FIG. 8 is a diagram showing the concept that the EMM data whose table ID and the like have been extracted by the EMM data ID extraction filter 81 are stored in different buffers according to their types.

As shown in the figure, the EMM data ID extraction filter 81 extracts an EMM section table ID and the like.
Section ID extraction filter 81A, EMM common message ID extraction filter 81B for extracting the EMM common message table ID, etc., and EMM individual message table ID
EMM individual message ID extraction filter 81C for extracting etc.
It consists of

The EMM section ID extraction filter 81A is
Table ID "0x84" and extended table ID "0xFFFF"
Extract the EMM section in which is set. The EMM section extracted by the EMM section ID extraction filter 81A is stored in the EMM section buffer 91A of the EMM data buffer 91.

EMM common message ID extraction filter 81B
Is the table ID of "0x85" and "0x0001" to "0xFFF"
Extract the EMM common message for which the extended table ID of "F" is set. EMM common message ID extraction filter 81
The EMM common message extracted by B is stored in the EMM common message buffer 91B of the EMM data buffer 91.

EMM individual message ID extraction filter 81C
Extracts the EMM individual message in which the table ID of "0x85" and the extended table ID of "0x0000" are set. E
The EMM individual message extracted by the MM individual message ID extraction filter 81C is stored in the EM of the EMM data buffer 91.
It is stored in the M individual message buffer 91C.

Like EMM data, section data in which the same PID is set even though a plurality of types of data are described are stored in different buffers according to the type of the data. So the host CPU
When reading and processing the EMM data, the reference numeral 41 can omit the process of identifying the type of the read EMM data by its table ID or the like.

Next, the operation of the demultiplexer 49 will be described.

First, the processing of the demultiplexer 49 for storing the section data in the memory 52 will be described with reference to the flowcharts of FIGS. 9 and 10.

The TS header analysis unit 61 determines in step S41 the PID of the supplied transport packet.
And proceeds to step S42 to determine whether or not the supplied transport packet is a packet including section data, based on the referred PID.

When it is determined in step S42 that the data does not include the section data, the TS header analysis section 61 terminates the process of storing the section data. As described above, the transport packet that does not include the section data, that is, the transport packet that includes the video data and the audio data is supplied to the PES analysis unit 63, and a predetermined reproduction process or the like is performed in the subsequent processes. .

On the other hand, the TS header analysis section 61 determines in step S
When it is determined at 42 that the supplied transport packet is a packet including section data, the process proceeds to step S43, and then it is determined whether the section data is EMM data.

When it is determined in step S43 that the supplied section data is not EMM data, the TS header analysis section 61 proceeds to step S44 to set the buffer of the memory 52 for storing the supplied section data. , Transport packets to the section data analysis unit 64.

In step S45, the data comparison section 84 of the section data analysis section 64 compares the supplied section data with the data set by the host CPU 41, and the flow advances to step S46 to find that the data are the same. It is determined whether or not there is, that is, whether or not the supplied section data is the section data instructed by the host CPU 41.

When the data comparing section 84 determines that the supplied section data is not the same as the data instructed by the host CPU 41, the section data is discarded and the processing is terminated, while When it is determined that the data of the same, the step S47
Then, the section data supplied is stored in the buffer set by the TS header analysis unit 61.

As a result, for example, in the buffer 92A and the buffer 92B, PAT (Program Association Table),
CAT (Conditional Access Table) or TSDT (TS Descr
Predetermined section data such as iption table) is stored for each PID.

On the other hand, in step S43, the TS header analysis section 61 determines that the section data supplied is EMM.
If it is determined that the data, it proceeds to step S48,
The section data (EMM data) supplied is used for the EMM data ID extraction filter 8 of the section data analysis unit 64.
Supply to 1.

The EMM data ID extraction filter 81 extracts the table ID and the extension table ID of the supplied EMM data in step S49.

Then, in step S50, the EMM data ID extraction filter 81 determines whether the extracted IDs are the table ID and the extended table ID set in the EMM section. Then, when the EMM data ID extraction filter 81 determines in step S50 that the extracted IDs are the table ID “0x84” and the extended table ID “0xFFFF” set in the EMM section, the supplied EMM data is supplied. Is notified to the memory setting unit 82.

The memory setting section 82 uses the supplied EMM.
When the notification that the data is the EMM section is received, the process proceeds to step S51, and the EMM section buffer 91A is set as a buffer for storing the EMM data.

In step S52, the EMM data comparison section 83 receives the supplied EMM data (EMM section).
And the data set by the host CPU 41 are compared, and the process proceeds to step S53 to determine the identity. That is, in step S53, the EMM data comparison unit 83 compares the value specified by the host CPU 41 as the data to be acquired with the supplied EMM section, and the supplied EMM section is specified by the host CPU 41. If it is determined that the data is not the same as the existing data, the process is terminated, and if it is determined that the data is the same, the process proceeds to step S54.

In step S54, the EMM data comparison unit 83 supplies the supplied EMM section to the EMM section buffer 91A set as a buffer for storing the EMM section, and stores the EMM section buffer 91A. After that, the process ends.

On the other hand, in step S50, when the EMM data ID extraction filter 81 determines that the extracted ID is neither the table ID nor the extended table ID set in the EMM section, the process proceeds to step S55, and then the extraction is performed. The specified ID is set in the EMM common message in Table I.
It is determined whether it is D and the extension table ID.

In step S55, the EMM data ID extraction filter 81 determines that the extracted table ID is the table ID "0x85" set in the EMM common message,
Moreover, the extracted extension table ID is "0x0001" to "0x
When it is determined that the ID is any one of "FFFF", the memory setting unit 82 is notified that the supplied EMM data is the EMM common message.

The memory setting section 82 uses the supplied EMM.
When the notification that the data is the EMM common message is received, the process proceeds to step S56, and the EMM common message buffer 9 is used as a buffer for storing the EMM data.
Set 1B.

Then, steps S52 to S5.
In 4, the EMM data comparison unit 83 performs the same process as when the EMM section is acquired. That is, the EMM data comparison unit 83 compares the supplied EMM common message with the value set by the host CPU 41,
The process proceeds to step S53 to determine the identity. In step S53, the EMM data comparison unit 83 sends the host CP
If it is determined that the value designated by U41 and the supplied EMM common message are the same, step S
In step 54, the EMM common message is stored in the EMM common message buffer 91B.

On the other hand, in step S55, when the EMM data ID extraction filter 81 determines that the extracted ID is neither the table ID nor the extended table ID set in the EMM common message, the process proceeds to step S57, and then It is determined whether the extracted IDs are the table ID and extension table ID set in the EMM individual message.

In step S57, the EMM data ID extraction filter 81 extracts the extracted ID from the table ID "0x85" set in the EMM individual message and the extended table ID.
If it is determined that it is not “0x0000”, the process proceeds to step S58, error processing such as discarding the EMM data is performed, and the processing is ended.

Further, the EMM data ID extraction filter 81 is
When it is determined in step S57 that the extracted IDs are the table ID “0x85” and the extended table ID “0x0000” set in the EMM individual message, it is confirmed that the supplied EMM data is the EMM individual message. Notify the memory setting unit 82.

The memory setting section 82 uses the supplied EMM.
When the notification that the data is the EMM individual message is received, the process proceeds to step S59, and the EMM individual message buffer 9 is used as a buffer for storing the EMM data.
Set 1C.

Then, steps S52 to S5.
In 4, the EMM data comparison unit 83 performs the same processing as that described above. That is, the EMM data comparison unit 83
Is the supplied EMM individual message and the host CPU4
The values set by 1 are compared, and the process proceeds to step S53 to determine the identity. EMM data comparison unit 83
When it is determined in step S53 that the value instructed by the host CPU 41 and the supplied EMM individual message are the same, the process proceeds to step S54,
EMM individual message buffer 91 for EMM individual message
It is stored in C and the process is terminated.

Of the EMM data acquired by the above processing, the EMM section is the EMM section buffer 91.
A, the EMM common message is stored in the EMM common message buffer 91B, and the EMM individual message is stored in AMM.
It is stored in the individual message buffer 91C.

Next, the processing of the host CPU 41 for reading the EMM data stored in the memory 52 by the above processing will be described with reference to the flowcharts of FIGS.

First, the processing of the host CPU 41 for reading the EMM section will be described with reference to the flowchart of FIG.

When the host CPU 41 detects an interrupt requesting to read the EMM section in step S71, the process proceeds to step S72.

In step S72, the host CPU 41
Accesses the EMM section buffer 91A of the memory 52 through the host CPU bus 46 and the memory interface 67 to read the stored EMM section. The host CPU 41 then proceeds to step S73.
Proceed to and perform predetermined processing based on the EMM section.

For example, the host CPU 41 executes step S7.
In step 3, the acquired EMM section is stored in the IC card 45, and a process such as validating the key stored in the IC card 45 is performed, and then the process is ended.

The EMM section buffer 91A is always EM-processed by the processing described with reference to FIGS. 9 and 10.
Since the M section is stored, the host CPU 41
The process of confirming what kind of data the EMM data read from the memory 52 is can be omitted.

Next, the processing of the host CPU 41 for reading the EMM common message will be described with reference to the flowchart of FIG.

In step S81, when the host CPU 41 detects an interrupt requesting to read the EMM common message, the host CPU 41 proceeds to step S82 to access the EMM common message buffer 91B and read the stored EMM common message. . And the host CPU
The process proceeds to step S83, and the 41 performs a predetermined process based on the EMM common message.

For example, the host CPU 41 executes step S8.
In 3, based on the acquired EMM common message,
After performing processing such as displaying a guide of a predetermined program on the display unit 53, the processing is ended.

Next, the processing of the host CPU 41 for reading the EMM individual message will be described with reference to the flowchart of FIG.

When the host CPU 41 detects the interrupt requesting to read the EMM individual message in step S91, the host CPU 41 proceeds to step S92, accesses the EMM individual message buffer 91C, and reads the stored EMM individual message. . And the host CPU
The process proceeds to step S93, and the 41 performs predetermined processing based on the EMM individual message.

For example, the host CPU 41 executes step S9.
In 3, the obtained EMM individual message is the IC card 4
After performing processing such as displaying the billing information obtained after decryption with the key stored in No. 5 on the display unit 53, the processing is ended.

As described above, even when the EMM common message or the EMM individual message is read, the host CPU 41 can surely obtain the EMM common message only by accessing the EMM common message buffer 91B. , EMM individual message buffer 9
The EMM individual message can be surely acquired only by accessing 1C.

Therefore, it is possible to omit the process of confirming which kind of the EMM data read from the memory 52, so that the host CPU 41
The processing of can be reduced. Also, the host CPU4
Since the processing by 1 can be used for other processing,
Higher quality images can be provided.

The above processing is carried out by BS (Broadcasting Satellit
e) Not only digital broadcasting but also CS (Communications Sate)
llite) Digital broadcasting and terrestrial digital broadcasting can also be applied.

The series of processes described above can be executed by hardware, but can also be executed by software. In this case, the information processing device that executes the software is configured by a personal computer as shown in FIG. 14, for example.

In FIG. 14, the CPU 101 has a ROM 102
Various processes are executed in accordance with the program stored in the RAM or the program loaded from the storage unit 108 into the RAM 103. The RAM 103 also appropriately stores data necessary for the CPU 101 to execute various processes.

CPU 101, ROM 102, and RAM 103
Are mutually connected via a bus 104. An input / output interface 105 is also connected to the bus 104.

The input / output interface 105 includes an input unit 106 including a keyboard and a mouse, a display including a CRT and an LCD, an output unit 107 including a speaker, a storage unit 108 including a hard disk, a modem and a terminal. A communication unit 109 composed of an adapter or the like is connected. The communication unit 109 performs communication processing via the network.

A drive 110 is also connected to the input / output interface 105 if necessary, and the magnetic disk 1
11, the optical disk 112, the magneto-optical disk 113, the semiconductor memory 114, or the like is mounted as appropriate, and the computer program read therefrom is installed in the storage unit 108 as necessary.

When a series of processes is executed by software, a program constituting the software executes a variety of functions by installing a computer in which dedicated hardware is installed or various programs. For example, it is installed in a general-purpose personal computer or the like from a network or a recording medium.

As shown in FIG. 14, this recording medium is a magnetic disk 111 (including a floppy disk) on which a program is recorded, which is distributed in order to provide the program to the user, separately from the apparatus main body, an optical disk. 112
(CD-ROM (Compact Disk-Read Only Memory), DVD (Digita
(including Versatile Disk)), magneto-optical disk 113 (M
D (registered trademark) (including Mini-Disk), or a package medium including a semiconductor memory 114, etc., and is provided with a program that is provided to the user in a state of being pre-installed in the main body of the apparatus, in which a program is recorded. ROM
102 and a hard disk included in the storage unit 108.

In the present specification, the steps for describing the program recorded on the recording medium are not limited to the processing performed in time series according to the order described, but may be performed in parallel even if they are not necessarily processed in time series. Alternatively, it also includes processes that are individually executed.

[0113]

According to the information processing apparatus and method of the present invention, the identification information of the transport packets forming the transport stream is analyzed, and the analyzed identification information is
When the same identification information is set and the transport packet includes section data in which different table identification information is set for each content, the table identification information set in the section data is extracted. Further, based on the extracted table identification information, the section data is stored in a buffer according to the content, and when the section data representing a predetermined content among the plurality of content is read, the section data representing the content is stored. Since the section data is read from the stored buffer, the load required for processing the section data can be reduced.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration example of a conventional demultiplexer.

FIG. 2 is a flowchart illustrating processing of the demultiplexer in FIG.

FIG. 3 is a flowchart illustrating a process of a host CPU shown in FIG.

FIG. 4 is a block diagram showing a configuration example of an STB to which the present invention is applied.

5 is a block diagram illustrating a configuration example of the demultiplexer in FIG.

6 is a block diagram showing a configuration example of a section data analysis unit in FIG.

FIG. 7 is a diagram showing a basic configuration of section data.

FIG. 8 is a block diagram showing the concept of data stored in a memory.

FIG. 9 is a flowchart illustrating processing of the demultiplexer in FIG.

10 is a flowchart illustrating processing of the demultiplexer in FIG. 5 following FIG. 9;

FIG. 11 is a flowchart illustrating processing of the host CPU in FIG.

12 is a flowchart illustrating another process of the host CPU in FIG.

FIG. 13 is a flowchart illustrating still another process of the host CPU in FIG.

FIG. 14 is a block diagram illustrating a configuration example of a personal computer.

[Explanation of symbols]

41 host CPU, 42 ROM, 43 RAM, 49
Demultiplexer, 52 memory, 61 TS header analysis unit, 64 section data analysis unit, 81 EMM
Data ID extraction filter, 81A EMM section ID extraction filter, 81B EMM common message ID extraction filter, 81C EMM individual message ID extraction filter,
82 memory setting unit, 83 EMM data comparing unit, 9
1 EMM data buffer, 91A EMM section buffer, 91B EMM common message buffer,
91C EMM individual message buffer, 111 magnetic disk, 112 optical disk, 113 magneto-optical disk, 114 semiconductor memory

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 5C025 AA30 BA14 BA25 BA27 DA01                 5C063 AB03 AB07 CA36 DA07 DA13                       DB10

Claims (4)

[Claims] 1. Analysis means for analyzing identification information of transport packets constituting a transport stream, and the same identification information set in the identification information analyzed by the analysis means, and for each content When different table identification information is for a transport packet containing section data that is further set,
Extraction means for extracting the table identification information set in the section data, and storage means for storing the section data in a buffer according to the content thereof based on the table identification information extracted by the extraction means. And reading out the section data representing a predetermined content from a plurality of contents, by reading the section data representing the content from a buffer in which the section data representing the content is stored by the storage means. An information processing apparatus comprising: 2. The information processing apparatus according to claim 1, wherein the section data is EMM data. 3. The extraction means further extracts extension table identification information set in the section data, and the storage means stores the table identification information and the extension table identification information extracted by the extraction means. The information processing apparatus according to claim 1, wherein the section data is stored in a buffer according to the content of the section data based on the section data. 4. An analysis step of analyzing identification information of a transport packet forming a transport stream, and the same identification information set in the identification information analyzed by the processing of the analysis step, and the contents When the table identification information different for each is related to the transport packet including the section data further set, the extraction step of extracting the table identification information set in the section data, by the processing of the extraction step A storing step of storing the section data in a buffer according to the content based on the extracted table identification information; and a storing step of reading out the section data representing a predetermined content from a plurality of contents By the processing of And a reading step of reading the section data representing the contents from a buffer in which section data is stored.