KR20050036552A - Digital signal receiver and method for storaging data broadcasting thereof - Google Patents

Abstract

Disclosed are a digital broadcast signal receiving apparatus and a method of storing additional data thereof. The demultiplexer filters the first section, which is a data service table section, and the plurality of second sections, which are a plurality of additional data sections, respectively, from the received transport stream. The parsing processor requests the demultiplexer to filter the first section, and parses the filtered first section to output a parsing result. The storage processor requests the demultiplexer to filter the second section, and signals the filtered second section into additional data that can be stored. The storage unit stores additional data that is signal processed. The controller controls the parsing processor and the storage processor to simultaneously request filtering of the first and second sections, and determines and controls whether or not signal processing is continued based on a parsing result of the parsing processor. According to the present invention, it is possible to store all of the DSM-CC sections of additional data transmitted in a predetermined period.

Description

Digital signal receiver and method for storing additional data thereof {Digital signal receiver and method for storaging data broadcasting}

The present invention relates to a digital broadcast signal receiver and an additional data storage method thereof, and more particularly, to a digital broadcast signal receiver and a digital broadcast signal receiver capable of storing all of the DSM-CC sections of additional data transmitted in a predetermined cycle within one period. A method for storing additional data.

Recently, as a technology related to DTV (Digital TV) broadcasting, data broadcasting based on Digital Storage Media-Command and Control (DSM-CC) has become a major concern. DSM-CC is a specification that transmits additional data to digital receiver along with digital broadcasting signal in broadcasting channel, and data broadcasting is broadcasting that provides interactive additional data such as weather, stock, travel and news according to DSM-CC specification. .

In order to provide data broadcasting, the digital receiver receives received additional data as one digital service table section (hereinafter referred to as a "DST section") and a plurality of actual additional data sections (hereinafter referred to as "DSM-CC sections"). Separate). The digital receiver first parses the DST section, stores a plurality of DSM-CC sections according to the parsing result, and then provides additional data services related to the stored DSM-CC section.

At this time, the digital receiver provides additional data services related to the DSM-CC section only when all of the plurality of DSM-CC sections are stored. However, the digital receiver fails to store a predetermined number of DSM-CC sections received while parsing the DST section by parsing the DST section and storing the DSM-CC section. Thus, the conventional digital receiver stores a predetermined number of DSM-CC sections which are not stored from re-received additional data and then provides additional data services.

However, digital broadcast signals are continuously transmitted while additional data is repeatedly transmitted at predetermined intervals. That is, the additional data is retransmitted only after a predetermined time elapses after being transmitted once. For example, when the total transmission time of the additional data is 10 minutes and the predetermined time is 20 minutes, the same additional data is retransmitted only after 20 minutes have elapsed after the initial additional data has been transmitted to the end. Therefore, the conventional digital receiver has to wait for a predetermined time interval as well as the total transmission time of the additional data to receive the same additional data. That is, the conventional digital receiver receives and stores a time required until a plurality of DSM-CC sections are stored to the end and a predetermined number of DSM-CCs that cannot be stored after being delayed for a predetermined time. As a result, the conventional digital receiver spends a lot of time in providing additional data services to the viewer.

SUMMARY OF THE INVENTION The present invention has been made in an effort to provide a digital broadcast signal receiving apparatus and a method of storing additional data thereof capable of storing all of a plurality of DSM-CC sections constituting additionally transmitted additional data within one period.

In order to solve the above technical problem, a digital broadcast signal receiving apparatus for providing additional data broadcasting according to the present invention includes a first section, which is a data service table section and a plurality of additional data sections, from a received transport stream. A demultiplexer for filtering each of the two sections, a parsing processor for requesting the demultiplexer to filter the first section, parsing the filtered first section, and outputting a parsing result; and a plurality of the demultiplexer A storage processor for requesting filtering of the second section of the signal, and storing a plurality of the second sections to be filtered as additional data that can be stored, a storage unit for storing the additional data to be processed, and the parsing processor and the The storage processor controls the filtering of the first and second sections at the same time, and the parsing of the parsing processor. And a controller configured to determine and control whether or not signal processing is continued based on a result.

More specifically, the demultiplexer extracts a program map table listing configuration information of the transport stream from the transport stream, parses the extracted program map table, and parses the extracted program map table into a first packet identifier of the first section. If there is a second packet identifier of the second section, a program map table processing unit for outputting the information of the first and second packet identifier to the control unit, wherein the control unit outputs the first and second packet identifier The parsing processing unit and the storage processing unit are controlled to request filtering of the first section and the second section having information of.

Preferably, the demultiplexer filters the first and second sections having the first and second packet identifier information, respectively, at the request of the parsing processor and the storage processor, and the parsing processor is configured to filter the first packet. The first section having identifier information is parsed, and the storage processor signal-processes the plurality of second sections having the second packet identifier information.

Specifically, when it is determined that the signal processing should be stopped based on the parsing result of the first section, the controller stops the signal processing of the second section to be filtered and deletes the additional data stored in the storage. The storage processing unit to control the storage processing unit.

In addition, if it is determined that the signal processing should be continued based on the parsing result of the first section, the control unit continues the signal processing of the filtered second section to store the additional data in the storage unit. Control the processing unit.

Also, the plurality of second sections may be any one of additional information implemented by predetermined software and applets.

Preferably, the parsing result includes a version of the second section, and the controller controls the signal processing of the plurality of second sections if a version of the second section obtained by the parsing is a newer version than a previously stored version. Control the storage processor to continue.

In addition, when the additional data is the software, the parsing result further includes a name of the manufacturer of the second section and the software, and the control unit is a version in which a version of the second section obtained by the parsing is pre-stored. The storage processing unit is controlled to continue the signal processing of the plurality of second sections if the name of the manufacturer and the software is the same as that of the latest version.

The controller controls the parser and the storage processor to simultaneously perform parsing of the first section and signal processing of the second section filtered by the demultiplexer.

On the other hand, in order to solve the above technical problem, the additional data storage method according to the present invention, the filtering request for simultaneously filtering the first section that is a data service table section and the plurality of second sections that are a plurality of additional data section And a filtering step of filtering the first section and the plurality of second sections, respectively, from the received transport stream by the request, and parsing processing of parsing the filtered first section and outputting a first parsing result. A signal processing step of signal processing the plurality of second sections to be filtered into additional data that can be stored; a storing step of storing the additional data to be signal processed; and a first processing section of the first section output from the parsing processing step. And determining whether to continue the signal processing of the signal processing step based on the parsing result.

Preferably, before the filtering request step, an extracting step of extracting a program map table listing the configuration information of the transport stream from the transport stream, and parsing the extracted program map table to extract the first section of the first section. And a parsing step of determining whether a first packet identifier and a second packet identifier of the second section exist, and if it is determined that the first and second packet identifiers exist in the parsing step, the filtering request step is performed. Requesting filtering of the first section and the second section with information of the first and second packet identifiers simultaneously.

In addition, the filtering step may filter the first and second sections having the first and second packet identifier information, respectively, by the filtering request step, and the parsing processing may include the first packet having the first packet identifier information. Parsing one section, the signal processing step signals a plurality of the second sections having the second packet identifier information.

Hereinafter, with reference to the accompanying drawings will be described the present invention in more detail.

1 is a block diagram schematically showing an apparatus for receiving digital broadcast signals according to a preferred embodiment of the present invention.

Referring to FIG. 1, a digital broadcast signal receiving apparatus 100 according to an exemplary embodiment of the present invention includes a tuner 110, a demultiplexer 120, a program map table, and a program map table. Table, hereinafter referred to as "PMT", the processor 130, the controller 140, the parser 150, the storage processor 160, the sub storage unit 170 and the main storage unit 180. First, the apparatus 100 for receiving a digital broadcast signal of FIG. 1 is a set-top box that provides additional data broadcasting such as broadcast program information, weather, security, travel, and the like, and shows only blocks related to storage of additional data.

The tuner 110 tunes to a predetermined channel among a plurality of channels received through an antenna, for example, a channel of an over-the-air broadcast or a satellite broadcast. The signal received over the tuned channel is in the form of a transport stream. The transport stream includes PMT as well as digital broadcast signals. In addition, when the tuned channel provides additional data broadcast, the transport stream has various sections for providing additional data as well as digital broadcast signals.

The PMT has configuration information of a transport stream. In other words, the PMT is a table listing packet identifiers (hereinafter, referred to as "PIDs") of each data (ie, sections) included in the transport stream. The packet identifier is used by the DeMUX 120 to be described later to demultiplex each type of data included in the transport stream.

DeMUX 120 demultiplexes the transport stream of the channel tuned by tuner 110 by characteristics. For example, the DeMUX 120 extracts a digital broadcast signal from a received transport stream and provides it to a broadcast signal processor (not shown), and extracts and provides a PMT to the PMT processor 130. In addition, when additional data is transmitted through the selected channel, the DeMUX 120 extracts the DST section and provides the parser 150 to the parsing unit 150. To provide. Detailed descriptions related to the DST section and the DSM-CC section will be described later.

The PMT processor 130 monitors the PMT. In the present invention, the PMT processing unit 130 monitors the version of the extracted PMT. The PMT processor 130 parses the PMT and outputs a parsing result when the monitored version of the PMT is higher than the previously transmitted version of the PMT. Here, the version of the PMT is changed when a part of each data constituting the PMT is changed by modification, addition, or deletion.

Table 1 shows an example of a result of parsing a PMT. section PID version PAT 0X11 V1.0 VCT 0X12 V1.2 ST 0X13 V1.O DST 0X14 V1.1 DSM-CC 0X15 V1.1

Referring to [Table 1], the PMT includes PIDs of the Program Association Table (PAT) section, the Virtual Channel Table (VCT) section, the ST section, the Data Service Table (DST) section, and the DSM-CC section, and the version information of each section. Consists of Here, when a part of the data constituting each section is changed, the version of each section is also changed, thereby changing the version of the PMT.

Of the sections shown in [Table 1], the sections related to the present invention are the DST section and the DSM-CC section. The DST section has identification information of additional data included in the transport stream, and the DSM-CC section has actual additional data for data broadcasting. Identification information of the additional data may vary, for example, the version of the additional data, the manufacturer, and the service name of the additional data. The additional data provides interactive information such as weather, stocks, travel, movies, etc., which are implemented by software pre-stored in the digital broadcasting signal receiving apparatus 100 or Java Applet. Here, when the additional data is data for upgrading the software stored in the main storage unit 180, the service name of the additional data refers to a software name.

As shown in [Table 1], the PID of the DST section (hereinafter referred to as “first PID”) applied to the first section as a result of PMT parsing and the PID of the DSM-CC section applied to the second section (hereinafter referred to as “second PID”) ), The PMT processor 130 provides the first 140 PID information (for example, '0X14') and the second PID information (for example, '0X15') to the controller 140.

When the first PID information and the second PID information are provided from the PMT processing unit 130, the controller 140 determines that the tuned channel provides the additional data broadcasting service. Accordingly, the controller 140 may simultaneously request filtering of the DST section having the first PID information and the DSM-CC section having the second PID information so as to provide the viewer with the additional data broadcasting service. 160). In this case, the controller 140 may simultaneously control the parsing processor 150 and the storage processor 160 to simultaneously request filtering. The parsing processing unit 150 and the storage processing unit 160 are predetermined tasks TASK that process the first section and the plurality of second sections, respectively.

The parsing processor 150 requests the DeMUX 120 to filter the DST section having the first PID information under the control of the controller 140. When the DST section is filtered from the DeMUX 120, the parsing processor 150 parses the DST section and outputs a parsing result to the controller 140. The parsing result of the DST section means the above-mentioned identification information such as the version in which the DSM-CC section is generated, the manufacturer, and the service name of the additional data broadcast.

The storage processor 160 requests the DeMUX 120 to filter a plurality of second sections having the second PID information under the control of the controller 140. Here, the parsing processing unit 150 and the storage processing unit 160 request filtering at the same time under the control of the control unit 140. When the plurality of DSM-CC sections from the DeMUX 120 are filtered in a predetermined order, the storage processor 160 signals the plurality of DSM-CC sections to be filtered into actual additional data that can be stored. That is, the storage processor 160 removes the header of each filtered DSM-CC section and outputs the header to the sub storage unit 170.

Meanwhile, when the parsing processor 150 and the storage processor 160 request filtering at the same time, the control unit 140 filters the parsing processor 150 with the DST section having the filtered first PID information to the storage processor 160. DeMUX 120 may be controlled to simultaneously provide a DSM-CC section with second PID information.

The sub storage unit 170 stores the actual additional data output from the storage processing unit 160 at a predetermined address. Here, for example, when the actual additional data consists of 100 DSM-CC sections, the DeMUX 120 filters the 100th DSM-CC section from the initial DSM-CC section in order. Since the storage processor 160 performs signal processing from the initial DSM-CC section in a predetermined order, the sub storage unit 170 stores each DSM-CC section in order from the initial DSM-CC section. This is obtained and stored by parsing the previously received certain DST section.

The main storage unit 180 stores a control program and a plurality of software for controlling and managing the overall operation of the digital broadcast signal receiving apparatus 100. In addition, the main storage unit 180 also stores identification information related to recently stored actual additional data. For example, the main storage unit 180 stores a recently stored version of software, a manufacturer, a software name, and the like, and a version of additional data implemented by a Java applet.

On the other hand, the controller 140 determines whether the storage processor 160 continues to process the signal based on the parsing result output from the parsing processor 150, and then controls the storage processor 160 according to the determination result.

In detail, the parsing result output from the parsing processor 150 is compared with identification information stored in the main storage unit 180. If it is determined that the signal processing of the storage processor 160 should be continued as a result of the comparison, the controller 140 controls the storage processor 160 to continue the signal processing of each DSM-CC section. As a result, the storage processor 160 processes each DSM-CC section filtered from the initial DSM-CC section into actual additional data, and processes the signal-processed additional data to be stored in the sub storage 170. When signal processing and storage from the initial DSM-CC section to the final DSM-CC section are completed, the storage processor 160 notifies the controller 140 of address information in which a plurality of DSM-CC sections are stored. For example, if the manufacturer of the additional data currently received and the stored manufacturer are the same and the version of the additionally received additional data is a higher version, the controller 140 must stop signal processing of the storage processor 160. I judge it.

For example, if a version obtained by parsing of the parsing processing unit 150 is a newer version than a version previously stored in the main storage unit 180, the control unit 140 continues to signal-process each DSM-CC section. Control 160. In particular, when the additional data service transmitted by each DSM-CC section is software, if the manufacturer and software name of the DSM-CC section is the same as the manufacturer and software name previously stored in the main storage unit 180, and the version is the latest version, the control unit 140 determines that the software is for upgrading the stored software, and controls the storage processor 160 to continue signal processing.

On the other hand, the parsing result output from the parsing processor 150 is compared with the identification information stored in the main storage unit 180. If it is determined that the signal processing of the storage processor 160 should be stopped as a result of the comparison, the controller 140 stops the signal processing of each DSM-CC section and deletes the additional data stored in the sub storage 170. Control 160. As a result, the storage processor 160 stops the signal processing of the filtered DSM-CC section and deletes the predetermined additional data stored in the sub storage 170. For example, if the manufacturer of the additionally received additional data is different from the stored manufacturer, or if the version of the additionally received additional data is a lower version or the same, the controller 140 must stop signal processing of the storage processor 160. I judge it.

Thus, the digital broadcast signal receiving apparatus 100 for providing additional data broadcasting according to the present invention initially requests filtering of a plurality of DST sections and a plurality of DSM-CC sections when the tuned channel provides the additional data broadcasting service. It is possible to store all without missing a certain number of DSM-CC sections to be filtered.

FIG. 2 is a flowchart schematically illustrating a method of storing additional data according to FIG. 1.

1 and 2, DeMUX 120 extracts the PMT by demultiplexing a transport stream being received by a predetermined channel. The PMT processor 130 monitors the PMT extracted from the DeMUX 120 and checks whether the PMT is up (S205, S210).

If it is determined in step S210 that the version of the PMT is up, the PMT processing unit 130 parses the PMT to determine the PID of the DST section (hereinafter referred to as "first PID") and the PID of the DSM-CC section (hereinafter referred to as "second PID"). (S215). If the first and second PIDs are present in operation S215, the PMT processing unit 130 notifies the controller 140 of the information of the first and second PIDs (S220).

The controller 140 simultaneously requests the parser 150 and the storage processor 160 to simultaneously request filtering of the same PID as the first PID and the second PID information, that is, the DST section having the first PID and the DSM-CC section having the second PID. To control. Accordingly, the parsing processor 150 and the storage processor 160 simultaneously request the DeMUX 120 to filter the DST section having the first PID and the DSM-CC section having the second PID (S225).

In operation S225, the DeMUX 120 filters the DST section having the first PID and the DSM-CC section having the second PID simultaneously or at a predetermined time difference (S230). The parsing processor 150 parses the DST section having the first PID filtered from the DeMUX 120 and outputs a parsing result to the controller 140 (S235). In addition, the storage processor 160 processes the DSM-CC section having the second PID filtered from the DeMUX 120 to generate additional data that can be stored, and then stores the additional data in the sub storage 170 (S240). . As such, multiple DSM-CC sections are stored from the initial DSM-CC section.

On the other hand, the control unit 140 compares the parsing result output in step S235 and the identification information stored in the main storage unit 180, and determines whether the signal processing of the DSM-CC section is performed in step S240 (S245). If it is determined in step S245 that the signal processing of the filtered DSM-CC section should be continued, the controller 140 controls the storage processor 160 to continue the signal processing of the DSM-CC section. As a result, the storage processor 160 continues the signal processing of the filtered DSM-CC section and processes the signal-processed additional data to be stored in the sub storage 170 (S250).

When signal processing and storage of the plurality of DSM-CC sections is completed by the step S250, the storage processing unit 160 notifies the controller 140 of the addresses where the plurality of DSM-CC sections are stored (S255). Thus, when an additional data service request is received from an external input device (eg, a remote controller), the controller 140 processes the additional data stored at a predetermined address of the sub storage unit 170 to be output as a viewable signal. do.

In addition, if it is determined that signal processing should be continued in step S245, the controller 140 processes the parsing result of the DST section output in step S235 to be stored in the main storage unit 180 (S260). This is for use when comparing and determining whether to receive and store other additional data when another additional data broadcast is provided through a predetermined channel.

Meanwhile, if it is determined in step S245 that signal processing of the filtered DSM-CC section should be stopped, the controller 140 controls the storage processor 160 to stop signal processing of the DMS-CC section. As a result, the storage processor 160 requests the DeMUX 120 to stop filtering the DSM-CC section having the second PID (S265). The storage processor 160 stops the signal processing of the filtered DSM-CC section until the operation S65 is performed and deletes additional data stored in the sub storage 170 (S270).

Thus, when the tuned channel provides additional data broadcasting in a predetermined period, it is possible to store a plurality of DSM-CC sections included in the received transport stream from the beginning within one period. This requires the filtering of the DST section and the DSM-CC section at the same time, so that the signal processing of the DSM-CC section is performed almost simultaneously with the parsing of the DST section without parsing the DSM-CC section after parsing the DST section. Is possible.

As described above, according to the apparatus for receiving digital broadcasting signals and the method of storing additional data thereof according to the present invention, when additional data is included in a transport stream of a tuned channel, filtering of a DST section and a plurality of DSM-CC sections are filtered. Demand simultaneously. As such, multiple DSM-CC sections are stored at one time from the initial DSM-CC section to the last DSM-CC section. Therefore, in the predetermined additional data broadcast repeatedly transmitted at a predetermined period, the digital broadcasting signal receiving apparatus according to the present invention can provide the additional data broadcasting to the user in a faster time by storing a plurality of DSM-CC sections in one period. Can be.

Although the present invention has been described in detail through the representative embodiments, those skilled in the art to which the present invention pertains can make various modifications without departing from the scope of the present invention with respect to the embodiments described above. Will understand. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims below and equivalents thereof.

1 is a block diagram schematically showing an apparatus for receiving digital broadcast signals according to an embodiment of the present invention;

FIG. 2 is a flowchart schematically illustrating a method of storing additional data according to FIG. 1.

Description of the main parts of the drawing

100: digital broadcast signal receiver 120: demultiplexer

130: PMT processing unit 140: control unit

150: parsing processing unit 160: storage processing unit

170: sub storage unit 180: main storage unit

Claims (17)

A demultiplexer for filtering a first section, which is a data service table section, and a plurality of second sections, which are a plurality of additional data sections, respectively, from the received transport stream; A parsing processor requesting the demultiplexer to filter the first section, and parsing the filtered first section to output a parsing result; A storage processor for requesting the demultiplexer to filter the plurality of second sections and for signal processing the plurality of second sections to be filtered as additional data that can be stored; A storage unit for storing the additional data to be signal processed; And A controller configured to control the parsing processor and the storage processor to simultaneously request filtering of the first and second sections, and determine and control whether or not signal processing is continued based on the parsing result of the parsing processor; Digital broadcast signal receiving apparatus for providing additional data broadcast comprising a. The method of claim 1, The demultiplexer extracts a program map table listing configuration information of the transport stream from the transport stream, A program map for parsing the extracted program map table and outputting information of the first and second packet identifiers to the controller if a first packet identifier of the first section and a second packet identifier of the second section exist Table processing unit further includes; The controller provides the additional data broadcast, characterized in that for controlling the parsing processor and the storage processor to request filtering of the first section and the second section having information of the first and second packet identifiers. Digital broadcast signal receiving apparatus. The method of claim 2, The demultiplexer filters the first and second sections having the first and second packet identifier information, respectively, at the request of the parsing processor and the storage processor, and the parsing processor includes the first packet identifier information. Parsing a first section, wherein said storage processor is configured to signal process a plurality of said second sections having said second packet identifier information. The method of claim 1, If it is determined that the signal processing should be stopped based on the parsing result of the first section, the controller stops the signal processing of the filtered second section and deletes the additional data stored in the storage. Digital broadcast signal receiving apparatus for providing an additional data broadcast, characterized in that for controlling. The method of claim 1, If it is determined that the signal processing should be continued based on the parsing result of the first section, the controller continues the signal processing of the filtered second section and stores the additional data in the storage unit. Digital broadcast signal receiving apparatus for providing additional data broadcast, characterized in that the control. The method of claim 1, And a plurality of the second sections are any one of additional information implemented by predetermined software and applets. The method of claim 6, The parsing result includes a version of the second section, The control unit controls the storage processing unit to continue the signal processing of the plurality of second sections if the version of the second section obtained by the parsing is a newer version than the previously stored version. Digital broadcast signal receiving apparatus. The method of claim 7, wherein If the additional data is the software, the parsing result further includes a name of a manufacturer of the second section and a name of the software, The controller performs signal processing of the plurality of second sections if the version of the second section obtained by the parsing is a newer version than the previously stored version, and the names of the manufacturer and the software are the same as the manufacturer and the name of the software. And a digital broadcast signal receiving apparatus for controlling additional data broadcasting. The method of claim 1, The controller controls the parser and the storage processor to simultaneously perform parsing of the first section and signal processing of the second section filtered by the demultiplexer. Broadcast signal receiver. A filtering request step of simultaneously requesting filtering of a first section which is a data service table section and a plurality of second sections which are a plurality of additional data sections; Filtering, by the request, the first section and the plurality of second sections, respectively, from a received transport stream; A parsing step of parsing the filtered first section and outputting a first parsing result; A signal processing step of signal-processing the plurality of second sections to be filtered into additional data that can be stored; A storage step of storing the additional data to be signal processed; And And determining whether to continue the signal processing of the signal processing step based on the parsing result of the first section output in the parsing processing step. The method of claim 10, Before the filtering request step, An extraction step of extracting a program map table listing the configuration information of the transport stream from the transport stream; And Parsing the extracted program map table to determine whether there is a first packet identifier of the first section and a second packet identifier of the second section; If it is determined in the parsing step that the first and second packet identifiers exist, the filtering request step simultaneously requests filtering of the first section and the second section having information of the first and second packet identifiers. Additional data storage method, characterized in that. The method of claim 11, The filtering step may filter the first and second sections having the first and second packet identifier information, respectively, by the filtering request step, and the parsing processing may include the first section having the first packet identifier information. Parsing the signal; and processing the signal by processing the plurality of second sections having the second packet identifier information. The method of claim 10, If it is determined in the determining step that the signal processing should be stopped based on the parsing result of the first section, the signal processing step stops the signal processing of the second section to be filtered and the additional data stored in the storing step. The additional data storage method, characterized in that for deleting. The method of claim 10, In the determining step, if it is determined that the signal processing should be continued based on the parsing result of the first section, the signal processing step continues the signal processing of the filtered second section. . The method of claim 10, The plurality of second sections may be any one of additional information implemented by predetermined software and applets. The method of claim 15, The parsing result includes a version of the second section, And if the version of the second section obtained in the parsing processing step is newer than a pre-stored version, the determining step determines that the signal processing should be continued. The method of claim 16, If the additional data is the software, the parsing result further includes a name of a manufacturer of the second section and a name of the software, If the version of the second section obtained in the parsing processing step is newer than the pre-stored version and the name of the manufacturer and the software is the same as the pre-stored manufacturer and name, the determination step is to continue the signal processing. The additional data storage method, characterized in that the judgment.