JP2008035352A - Portable electronic apparatus, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the convenience of digital broadcasting recording in a portable electronic apparatus. <P>SOLUTION: A recording data generation section 130 generates TOD from received broadcasting data for storing into a data memory 50 (built-in memory) with a recording start instruction as a trigger, and generates MOI and MAI corresponding to the stored TOD for holding in a work memory 80. A copy control section 140 generates copy control information based on digital copy control information included in the received broadcasting data and adds the information to TOD generated by the recording data generation section 130. A data encryption section 150 encrypts the generated TOD according to the copy control information. A file generation section 160 connects MOI and MAI held in the work memory 80 to TOD stored in the data memory 50 (built-in memory) with a recording completion instruction as a trigger, generates header information for indicating the connection relationship, and generates one recording file for storing it into the data memory 50 (built-in memory). <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a portable electronic device and a program, and more particularly to a portable electronic device and a program suitable for recording digital television broadcasts.

  In mobile communication terminals such as mobile phones, various functions other than a call function, which is a basic function, have been added and the number of functions has been increasing. Recently, one-segment broadcasting (so-called one-segment broadcasting), which is digital television broadcasting for mobile devices, has been implemented, and mobile communication terminals that can receive one-segment broadcasting have also been put into practical use.

  In addition, along with the reduction in the price of semiconductor memory devices such as flash memory and the size and density of hard disk devices, large-capacity storage devices can be mounted even in small devices such as mobile communication terminals. Recording of received digital television broadcasts is also possible (for example, Patent Document 1).

  In digital broadcasting such as one-segment broadcasting, since the broadcast contents are provided as digital data, there is no deterioration in image quality even if the recorded contents are copied many times. Therefore, copy control (so-called CPRM (Content Protection for Recordable Media)) is performed for the purpose of copyright protection of broadcast contents.

  As copy control technology in one-segment broadcasting, up to now, copy restriction by digital copy control information and implementation of a content protection function in a built-in memory of a receiving terminal have been defined. For this reason, when recording a one-segment broadcast with a mobile communication terminal, it is only possible to record in a built-in memory, and from there, copying or moving to a memory card or other digital playback device cannot be performed.

  However, in the conventional rule that recording can be performed only in the built-in memory, it can be played back only by the device that performed the recording, which is inconvenient. In view of such circumstances, “SD-Video” (CPRM Specification, SD Memory Card Book, SD), which is a content protection technology (recording format) for SD (Secure Digital) Memory Card ™, which is a type of removable memory card. -Video Part, Revision 0.95, October 31, 2005) will be added to the terrestrial digital television broadcasting operation regulations (ARIB TR-B14 2.8), and 1 segment broadcasting etc. will be directly added to the SD memory card (trademark). In addition to recording, it is possible to move recorded data from the built-in memory to an SD memory card (trademark).

  As described above, the format for recording to the memory card has been standardized. However, according to the above-mentioned terrestrial digital television broadcasting operation regulations (ARIB TR-B14 2.8 version), the recording format to the built-in memory Is optional. Therefore, in order to move the data recorded in the internal memory to the memory card, it is necessary to perform an operation such as data conversion or record it in the internal memory in a format suitable for the memory card.

  In this case, in the above-described SD-Video standard, for each recording, TOD (Transport Stream Object Data), MOI (Media Object Information), and MAI (Media Object Additional Information) as shown in FIG. Since three types of data files called are to be created, when such multiple types of files are generated when recording to the built-in memory, recording data management (for example, deletion or duplication of recording data) Etc.) and the processing load for data conversion may increase.

Control units (CPU (Central Processing Unit), etc.) of mobile communication terminals are limited in processing capacity compared to personal computers, etc. due to restrictions associated with mounting on small devices, etc. Many processes must be performed according to the conversion. For this reason, if such a high processing load occurs, the convenience may be lowered, for example, a waiting time for the user may occur.
JP 2003-111004 A

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a portable electronic device and a program that improve the convenience of recording of digital television broadcasts in a mobile communication terminal or the like. To do.

In order to achieve the above object, a portable electronic device according to the first aspect of the present invention provides:
It has digital TV broadcast reception and recording functions,
A built-in memory for storing recording data by the recording function;
In a portable electronic device comprising: an interface for reading from and writing to a removable external memory for copying or moving the recorded data stored in the built-in memory;
A recording control unit configured to generate a recording file composed of one file obtained by combining a plurality of types of data generated based on a recording format in the external memory and store the recording file in the built-in memory;
It is characterized by that.

In the portable electronic device,
The plurality of types of data may be TOD (Transport Stream Object Data), MOI (Media Object Information), and MAI (Media Object Additional Information) generated based on the SD-Video format.
The recording control means includes
It is desirable to generate TOD, MOI, and MAI based on the received broadcast data, and generate the recording file by combining the generated TOD, MOI, and MAI.

In the portable electronic device,
The recording control means includes
In response to an instruction to start recording, TOD is acquired from the received broadcast data and stored in the built-in memory, and MOI and MAI corresponding to the stored TOD are generated and stored in a predetermined work memory. When,
In response to a recording end instruction, file generation means for combining the MOI and MAI held in the work memory with the TOD stored in the built-in memory and generating the recording file by generating header information indicating the coupling relationship When,
It is desirable to further include.

In the portable electronic device,
The recording control means includes
Copy control means for generating copy control information based on digital copy control information included in the received broadcast data, adding it to the TOD, and performing copy control during recording based on the copy control information is further provided. Is desirable.

  The portable electronic device can be a mobile communication terminal.

In order to achieve the above object, a program according to the second aspect of the present invention is:
Read / write to / from the built-in memory that stores the recorded data by the recording function and the removable external memory that records the recorded data stored in the built-in memory in the SD-Video format. And a computer for controlling a portable electronic device equipped with
Triggered by a recording start instruction, generates a TOD from the received broadcast data and stores it in the built-in memory, generates a MOI and a MAI corresponding to the stored TOD, and holds them in a predetermined work memory;
A function of generating copy control information based on digital copy control information included in the received broadcast data, adding the copy control information to the TOD, and performing copy control based on the copy control information;
Triggered by a recording end instruction, a function for generating a recording file by combining the MOI and MAI held in the work memory with the TOD stored in the built-in memory and generating header information indicating the coupling relationship;
It is characterized by realizing.

  According to the present invention, since a single file combining a plurality of types of data created in a recording format for a memory card is generated and stored in the built-in memory, handling of the recorded data in the built-in memory becomes easy and convenient. Improves.

  Hereinafter, embodiments according to the present invention will be described with reference to the drawings. In the present embodiment, a case where the portable electronic device according to the present invention is configured by a mobile communication terminal will be described. The mobile communication terminal 1 according to the present embodiment is a mobile communication terminal device (telephone) such as a mobile phone or a PHS (Personal Handyphone System). In the present embodiment, the mobile communication terminal 1 receives / receives digital television broadcasts. Assume that it has a recording function. In the present embodiment, a one-segment broadcast for a mobile body is assumed as a digital television broadcast received and recorded by the mobile communication terminal 1.

  The configuration of such a mobile communication terminal 1 will be described with reference to FIG. FIG. 1 is a block diagram illustrating a configuration example of a mobile communication terminal 1 according to an embodiment of the present invention. As shown in the figure, a mobile communication terminal 1 according to the present embodiment includes a communication function unit 10, a broadcast receiving unit 20, an operation unit 30, a display unit 40, a data memory 50, a card interface (I / F) 60, a program memory. 70, the control unit 100, and the like.

  The communication function unit 10 performs an operation related to a communication function which is a basic function of the mobile communication terminal 1. For example, communication using a communication method such as a CDMA (Code Division Multiple Access) method is used. A wireless communication is performed with a nearby base station by performing wireless transmission / reception by the antenna 11 that is configured by a device and is compatible with the communication method.

  The communication function unit 10 also includes a codec circuit that performs voice processing, for example, and performs voice processing related to voice calls. That is, the received voice data is converted into an analog signal and output from the speaker 12, and the transmission voice input from the microphone 13 is converted into digital data for transmission.

  The broadcast receiving unit 20 is composed of, for example, a receiving device for digital terrestrial broadcasting, and receives broadcast radio waves transmitted by one segment broadcast. The broadcast receiving unit 20 includes a predetermined tuner circuit, a demodulation circuit, and the like, and performs a decoding process of a broadcast radio wave received by the antenna 21 for receiving a one-segment broadcast, thereby performing digital television of the mobile communication terminal 1. John reception function is realized.

  In the case of 1-segment broadcasting, a packet in which video data, audio data, and additional data are usually multiplexed in the Transport Stream (TS) format specified by the MPEG-2 system (ISO / IEC 13818-1) Broadcast data is composed of (TS packets). Therefore, in the present embodiment, the digital television reception function of the mobile communication terminal 1 is realized by the broadcast receiving unit 20 receiving such a TS packet sequence.

  The operation unit 30 includes, for example, a cross cursor key, a character key (numeric keypad) for inputting numbers and characters, a function key for designating various functions, and the like, and is operated by the user of the mobile communication terminal 1. Operated. The operation unit 30 generates an input signal corresponding to the operation of these keys and inputs the input signal to the control unit 100.

  The display unit 40 is a display output device configured from, for example, a liquid crystal display device, and displays and outputs images and the like under the control of the control unit 100. In the present embodiment, a moving image of a television program received and recorded by the digital television reception / recording function of the mobile communication terminal 1 is displayed and output by the display unit 40.

  Note that the audio of the television broadcast received by the broadcast receiving unit 20 is processed by the codec circuit of the communication function unit 10 and output from the speaker 12.

  The data memory 50 is composed of, for example, a flash memory or a hard disk device, and stores various data. In the present embodiment, the mobile communication terminal 1 functions as a built-in memory for storing broadcast data recorded by the digital television recording function.

  The card I / F 60 includes, for example, a memory card slot in which a detachable memory card MC (external memory) is mounted. In the present embodiment, an SD memory card (trademark) capable of recording video data or the like in the SD-Video standard format is assumed as a memory card MC (external memory) mounted on the card I / F 60. The card I / F 60 reads / writes from / into the memory card MC (external memory) mounted under the control of the control unit 100. In the present embodiment, it is assumed that the recording data stored in the data memory 50 (built-in memory) is copied or moved to the memory card MC (external memory) by this operation.

  The program memory 70 is composed of, for example, a ROM (Read Only Memory) or a flash memory, and stores a program executed by the control unit 100.

  The control unit 100 includes, for example, a CPU (Central Processing Unit), a RAM (Random Access Memory), and the like, and controls the operation of each unit of the mobile communication terminal 1. In the present embodiment, the control unit 100 executes the operation program stored in the program memory 70, thereby realizing each process described later. The RAM configured in the control unit 100 functions as a work memory 80 when the CPU executes processing.

  In the present embodiment, the control unit 100 functions as a recording control unit (recording control unit 100) for controlling the recording function of the mobile communication terminal 1 by executing a program. More specifically, it functions as each component as shown in the functional block diagram of FIG. That is, when recording a digital television broadcast on the mobile communication terminal 1, the control unit 100 includes a recording operation determination unit 110, a copy control determination unit 120, a recording data generation unit 130, and a copy control unit 140 as illustrated. , Function as a data encryption unit 150, a file generation unit 160, and the like.

  The recording operation determination unit 110 determines an operation related to the recording function of the mobile communication terminal 1 in cooperation with the operation unit 30. Here, it is determined whether or not a recording start instruction is input and a recording end instruction is input.

  The copy control determination unit 120 acquires the copy control information included in the TS packet received by the broadcast receiving unit 20 in cooperation with the broadcast receiving unit 20, and is applied to the television broadcast to be recorded. Determine the copy control type. In this embodiment, it is assumed that copy control is determined based on digital copy control information included in a PMT (Program Map Table) packet that constitutes a TS packet. This PMT packet is specified in the MPEG-2 system (ISO / IEC 13818-1) and also specified in the terrestrial digital television broadcast operation regulations (ARIB TR-B14) as the SD-Video standard copy control technology (CPRM). As shown in FIG. 6A, it is inserted into a broadcast TS packet sequence at a constant cycle (at intervals of 200 ms to 500 ms).

  An example of the digital copy control information included in the PMT packet is shown in FIG. As shown in the figure, the digital copy control information is composed of a digital copy control descriptor and a content use descriptor, and the type of copy control is defined by the descriptor value.

  It is assumed that a correspondence table indicating the specified contents of the digital copy control information as shown in FIG. 6B is stored in advance in, for example, the data memory 50, and the copy control determination unit 120 uses the correspondence table. With reference to this, it is assumed that the copy control applied to the digital television broadcast to be recorded is determined.

  The recorded data generation unit 130 generates recorded data to be stored in the data memory 50 (built-in memory) by the recording function of the mobile communication terminal 1. In the present embodiment, data generation conforming to the SD-Video standard is performed. That is, the recording data generation unit 130 acquires Transport Stream Object Data (TOD) from the TS packet sequence received by the broadcast reception unit 20, and generates Media Object Information (MOI) and Media Object Additional Information (MAI). To do.

  TOD is data indicating the content of the received television broadcast such as video and audio. Therefore, TOD is generated by acquiring the payload part of the received TS packet. The MOI is a kind of management information, and includes seek information such as fast forward and fast return, recording time information, and the like. MAI is also a kind of management information, and includes missing packet information and the like.

  Here, the recorded data generation unit 130 stores the generated TOD in the data memory 50 (built-in memory) and holds the generated MOI and MAI in the work memory 80.

  The recording data generation unit 130 starts generation of recording data in response to the input of the recording start instruction determined by the recording operation determination unit 110, and the digital television broadcast received by the broadcast reception unit 20 at that time is started. Record data is generated from the TS packet.

  The copy control unit 140 generates copy control information to be added to the recording data generated by the recording data generation unit 130 according to the copy control type determined by the copy control determination unit 120. In this embodiment, it is assumed that copy control information is added to recorded data using an RDI (Real-Time Data Information) packet defined by the SD-Video standard.

  In this case, the copy control unit 140 generates an RDI packet including a CPF (Copy Permission Flag) indicating a copy control type, and the recording data generation unit 130 generates the copy control flag 140 as illustrated in FIG. Is inserted into the TOD packet sequence at a predetermined cycle. For example, the copy control unit 140 sets the CPF value and generates an RDI packet based on the correspondence shown in FIG. 7B.

  It is assumed that a correspondence table showing the correspondence between the CPF value and the copy control type as shown in FIG. 7B is stored in advance in the data memory 50, for example, and the copy control unit 140 uses this correspondence table. The CPF value is set according to the determination result of the copy control determination unit 120.

  The data encryption unit 150 encrypts the TOD packet according to the CPF value of the RDI packet generated by the copy control unit 140. That is, when the CPF value of the RDI packet generated by the copy control unit 140 indicates the encryption of the packet sequence (see FIG. 7B), the data encryption unit 150 determines that the TOD packet sequence following the RDI. Is encrypted. Note that the encryption method is arbitrary. For example, encryption is performed using an encryption method defined in the SD-Video standard.

  The file generation unit 160 is held in the work memory 80 in the TOD packet sequence stored in the data memory 50 (built-in memory) by the recording data generation unit 130 when the recording end instruction determined by the recording operation determination unit 110 is input. The recorded MOI and MAI are combined to generate one recording file. That is, one recording file corresponding to one recording operation is generated and stored in the data memory 50 (built-in memory).

  In the present embodiment, the operation related to the recording control is realized by the control unit 100 executing a program. However, the present invention is not limited to this, and for example, an ASIC (Application Specific Integrated Circuit) Each configuration of the recording control unit 100 may be realized by dedicated hardware such as an integrated circuit.

  Each of the above-described configurations is a configuration necessary for realizing the present invention, and other configurations necessary for a basic function and an additional function as a mobile communication terminal are provided as necessary.

  The operation of the mobile communication terminal 1 having such a configuration will be described below. Here, a broadcast reception / recording process executed when a broadcast is received / recorded by the digital television reception / recording function of the mobile communication terminal 1 will be described with reference to a flowchart shown in FIG. This broadcast reception / recording process is started when the user of the mobile communication terminal 1 operates the operation unit 30 to instruct execution of the digital television reception function.

  When the process is started, the broadcast receiver 20 starts receiving the broadcast wave of the digital television broadcast, and the TS packets transmitted using the broadcast wave are sequentially acquired. Thereby, the video broadcast on the selected channel is displayed and output on the display unit 40, and the sound is output from the speaker 12 (step S101).

  When the operation unit 30 for instructing the start of recording is operated in the state of receiving the broadcast in this way (step S102: Yes), an input signal indicating that is sent from the operation unit 30 to the control unit 100. Entered. In this case, the recording operation determination unit 110 determines that recording start is instructed by the input signal.

  When the input of the recording start instruction is determined, the recording operation determination unit 110 notifies the copy control determination unit 120 and the recording data generation unit 130 of the start of the recording operation. In response to this notification, the recorded data generation unit 130 accesses the data memory 50 (built-in memory), creates a combined information area and a user information area (details will be described later) as a header area of the recorded file, and then receives the broadcast. The acquisition of the TS packet sequence received by the unit 20 is started (step S103).

  In this case, the copy control determination unit 120 acquires the PMT packet inserted in the TS packet sequence acquired by the recorded data generation unit 130 (step S104). When the PMT packet is acquired, the copy control determination unit 120 determines copy control applied to the received digital television broadcast based on the digital copy control descriptor described in the PMT packet, and performs copy control. A copy control process for performing copy control in cooperation with the unit 140 is executed (step S200).

  In this copy control process, first, based on the acquired digital copy control information of the PMT packet, the copy control type applied to the broadcast being received as a recording target is determined.

  Here, the PMT packet inserted in the TS packet sequence is prepared for each program, information indicating the attributes of the video stream and audio stream included in the program, and the TS packet containing each stream. In addition to the description of PID (Packet Identifier), as described above, copy control information as shown in FIG. 6B is included. As shown in FIG. 6B, the digital copy control information of the PMT packet includes a “digital copy control descriptor” and a “content usage descriptor”. The digital copy control descriptor is composed of 2-bit “copy_control_type” and “digital_recording_control_data”, respectively, and the content usage descriptor is composed of 1-bit “encryption_mode”.

  copy_control_type indicates the type of data to be subjected to copy control. For example, video data received by digital television broadcasting is indicated by “01”. The copy control type is defined by a 2-bit value indicated by digital_recording_control_data. As shown in FIG. 6B, for example, if the value is 00, “Copy Freely” is possible, and if the value is 10, “Only one generation can be copied (Copy Once)”. Yes, if the value is 11, “copy prohibited”.

  The content usage descriptor encryption_mode defines output protection for content that can be copied unconditionally. For example, a value of 0 indicates that the output protection for the content is “none”, and a value of 1 indicates that the output protection is “present”. The output protection in this case is, for example, encryption or scramble. For example, even if the content is not set with a limit on the number of copies, when encryption is requested at the time of copying and playback is allowed only on a specific playback device to protect the copyright of the content, encryption_mode is set to Set to “With output protection”.

  The operation in the copy control process for determining the copy control type based on such digital copy control information will be described with reference to the flowchart shown in FIG.

  The copy control determination unit 120 refers to the digital copy control information of the acquired PMT packet, and first, based on the value set in copy_control_type, whether or not the copy control target specified by the PMT packet is the recording target data. Is determined (step S201). Here, since the process is related to the recording of the digital television broadcast, it is determined whether or not the data targeted by the digital copy control information indicates the recording target.

  In this case, the copy control determination unit 120 can determine whether or not the designated copy control target is recording target data by determining whether or not the value of copy_control_type is 01. That is, if the value of copy_control_type is 01, the specified copy control target is recording target data, and if the value is other than 01, the specified copy control target is not recording target data. . If the designated copy control target is not data to be recorded (step S201: No), the process returns to step S104 of the broadcast reception / recording process (FIG. 3), which is the main routine, to acquire the next PMT packet.

  On the other hand, when the copy control target specified by the acquired PMT packet is the recording target data (step S201: Yes), the copy control determination unit 120 determines the presence or absence of copy restriction based on the value set in digital_recording_control_data. (Step S202).

  In other words, if the value of digital_recording_control_data is 10 indicating that only one generation can be copied, or 11 indicating that copying is prohibited, it means “copying is restricted” and that copying is possible unconditionally. If it is 00, it means “no copy restriction”.

  When it is determined that there is copy restriction based on the value of digital_recording_control_data (step S202: Yes), the copy control determination unit 120 further determines whether or not the number of times of copy restriction is specified (step S203). Here, the number of copy restrictions is determined depending on whether the value of digital_recording_control_data is 10 or 11. That is, when the value of digital_recording_control_data is 10, it indicates that only one generation can be copied (so-called copy once), and therefore it is determined that “number of times is specified”. On the other hand, when the value of digital_recording_control_data is 11, it indicates that copying is prohibited, and it is determined that “no number of times is specified”.

  If it is determined that there is no copy restriction based on the value of digital_recording_control_data (step S202: No), the copy control determination unit 120 further determines whether output protection is present (step S204). Here, the presence / absence of output protection is determined based on the value of encryption_mode set as the content usage descriptor of the acquired PMT packet. That is, if the value of encryption_mode is 0, it is determined that “output protection is not present”, and if the value of encryption_mode is 1, it is determined that “output protection is present”.

  When the type of copy control applied to the digital television broadcast to be recorded is determined by such determination processing in steps S202 to S204, the copy control determination unit 120 notifies the copy control unit 140 of the determination result. .

  In response to the notification from the copy control determination unit 120, the copy control unit 140 generates copy control information to be added to the recorded data. Here, based on a correspondence table as shown in FIG. 7B, an RDI in which a CPF value corresponding to the notified copy control type is set is generated.

  That is, when the copy control applied to the digital television broadcast to be recorded is “copy prohibited” (step S202: Yes, S203: No), the copy control unit 140 sets the CPF value “11” corresponding to the copy prohibited. "Is set (step S205).

  Similarly, when the determined copy control is “copy once” (step S202: Yes, S203: Yes), an RDI packet in which the CPF value “10” corresponding to the copy once is set is generated (step S206).

  When the determined copy control is “unconditional copy + no output protection” (step S202: No, S204: No), an RDI packet in which the corresponding CPF value “00” is set is generated. (Step S207) If “Unconditional copy + output protection is present” (so-called EPN (Encryption Plus Non-Assertion)) (Step S202: No, S204: Yes), the corresponding CPF value “01” is set. Generated RDI packets are generated (step S208).

  When the RDI packet corresponding to the copy control applied to the digital television broadcast to be recorded is generated in this way, the flow returns to the broadcast reception / recording process flow shown in FIG.

  Returning to the broadcast reception / recording process, the copy control unit 140 stores the RDI packet generated by the copy control process in the header area created in the data memory 50 (built-in memory) in step S103 (step S105).

  Then, the recorded data generating unit 130 sequentially generates TOD packets from the TS packet sequence acquired from the broadcast receiving unit 20 (step S106). In other words, payload portions indicating video and audio are sequentially acquired from the TS packet sequence, and TOD serving as recording data indicating content is sequentially generated.

  Here, the copy control unit 140 determines whether encryption is necessary based on the RDI packet generated by the copy control process (step S107), and if encryption is necessary (step S107: Yes), this fact is indicated. The data encryption unit 150 is notified. In this case, the data encryption unit 150 encrypts the TOD packet generated by the recorded data generation unit 130 (step S108), and stores it after the RDI packet stored in the data memory 50 (built-in memory) in step S105 ( Step S109).

  On the other hand, when encryption is not necessary (step S107: No), the recorded data generation unit 130 stores the TOD packet generated in step S106 following the RDI packet stored in the data memory 50 (built-in memory). (Step S109).

  In parallel with the generation of the TOD packet, the recorded data generation unit 130 sequentially generates MOI and MAI that are management information, and holds them in the work memory 80 (step S110). Here, in generating the MOI and MAI, for example, by acquiring PCR (Program Clock Reference: program time reference value information) which is time information serving as a reference at the time of stream reproduction from the TS packet sequence, An MOI indicating the recording time is generated. Further, for example, MAI such as missing packet information is generated based on an error correction function in the broadcast receiving unit 20 or the like.

  The operation of generating the TOD packet and storing it in the data memory 50 (built-in memory) and holding the generated MOI and MAI in the work memory 80 is performed by the next PMT packet from the acquired TS packet sequence. The process continues until it is acquired (step S111: No, S112: No).

  If there is a next PMT packet in the acquired TS packet sequence (step S112: Yes), the PMT packet is acquired (step S104), and the copy control process (step S200) is executed again. A new RDI packet is generated. In this case, the RDI packet is stored following the TOD packet already stored in the data memory 50 (built-in memory). Then, the TOD packet is stored following the newly stored RDI packet, and the MOI and MAI are held in the work memory 80 (steps S105 to S110).

  In this way, TOD, MOI, and MAI that are recorded data based on the SD-Video standard are sequentially generated. That is, as shown in FIG. 8, recorded data having a data structure in which a TOD packet follows an RDI packet in which a CPF value is set is sequentially stored in a data memory 50 (built-in memory), and MOI and MAI are stored in a work memory 80. Held in.

  When a recording end instruction is input by the user operating the operation unit 30 (step S111: Yes), the operation unit 30 inputs a signal indicating that to the control unit 100. Thereby, the recording operation determination unit 110 determines that a recording end instruction has been input.

  In this case, the recording operation determination unit 110 instructs the file generation unit 160 to generate a recording file using the generated TOD, MOI, and MAI. In response to an instruction from the recording operation determination unit 110, the file generation unit 160 executes a recording file generation process for generating a recording file (step S300).

  This processing conforms to the SD-Video standard for recording recording data on a memory card MC (external memory), which is an SD memory card (trademark), but is different from the file format defined in the SD-Video standard. A file format recording file is generated and stored in the data memory 50 (internal memory). The data structure of the generated recording file will be described with reference to FIG.

  The entire recording file has a data structure as shown in FIG. As shown in the figure, the recording file generated by the file generation unit 160 is composed of a combined information area, a user information area, a TOD block, an MOI block, and an MAI block, and among these, the combined information area and the user information area Constitutes the header part of the recording file, and the TOD block, MOI block, and MAI block constitute the actual data part of the recording file.

  The combined information area is, for example, an area having a length of 32 bytes, and is an area for storing information (joined information) for managing the connection relationship of the recording file.

  The user information area is, for example, a 512-byte area, and title information not included in the actual data TOD, MOI, and MAI (for example, vendor ID described in the RDI packet, information on whether or not recording data can be moved, etc.) (Arbitrary user information).

  The header portion composed of the combined information area and the user information area is secured in the data memory 50 (built-in memory) in step S103 of the above-described broadcast reception / recording process (FIG. 3). Is.

  The TOD block is an area prepared after the header part, and stores an TOD packet sequentially generated by a recording operation.

  The MOI block is an area prepared after the TOD block, and is an area for storing the MOI generated by the recording operation.

  The MAI block is an area prepared after the MOI block, and is an area for storing the MAI generated by the recording operation.

  A data configuration example of the combined information stored in the combined information area among such areas will be described with reference to FIG. As shown in the figure, the combination information includes information such as file type information, file size information, TOD offset information, TOD size information, MOI offset information, MOI size information, MAI offset information, MAI size information, etc. (each Information is, for example, 4 bytes).

  Details of the recording file generation processing for generating a recording file having such a data structure will be described with reference to the flowchart shown in FIG.

  When the process is started, the file generation unit 160 first accesses the data memory 50 (built-in memory), and records the file type information in the combined information area prepared in step S103 of the broadcast reception / recording process (FIG. 3). (Step S301).

  The file type information is information indicating the file type of the recording file to be generated. If the file is a one-segment broadcast recording file received by the mobile communication terminal 1, for example, a character string “1seg” is recorded as the file type. Is done.

  Next, the file generation unit 160 records TOD offset information in the combined information area (step S302). The TOD offset information is information indicating the start position of the TOD block in the generated recording file. As described above, since the TOD block is stored subsequent to the header portion, information indicating the data length of the header portion is TOD offset information. For example, if the combined information area is 32 bytes long and the user information area is 512 bytes long, “544” (32 + 512) is recorded as TOD offset information.

  Next, the file generation unit 160 acquires the block size (TOD block size) of the RID packet and the TOD packet sequentially stored in steps S105 and S109 of the above-described broadcast reception / recording process (FIG. 3), and stores the TOD in the combined information area. The size information is recorded (step S303).

  When the TOD block size is recorded, the file generation unit 160 stores MOI offset information indicating the start position of the MOI stored following the TOD block in the combined information area (step S304). Here, since the MOI is stored following the end of the TOD block, the file generation unit 160 adds the value indicated by the TOD offset information recorded in step S302 and the value indicated by the TOD size information recorded in step S303. Is recorded as MOI offset information.

  When the MOI offset information is recorded, the file generation unit 160 acquires the MOI held in the work memory 80 in step S110 of the above-described broadcast reception / recording process (FIG. 3), and stores it in the data memory 50 (built-in memory). The stored MOI block size (MOI block size) is acquired and recorded as MOI size information in the combined information area (step S306).

  When the MOI block size is recorded, the file generating unit 160 stores MAI offset information indicating the start position of the MAI stored following the MOI block in the combined information area (step S307). Here, since the MAI is stored following the end of the MOI block, the file generation unit 160 determines the value indicated by the TOD offset information recorded in step S302, the value indicated by the TOD size information recorded in step S303, The total value of the value indicated by the MOI offset information recorded in S304 and the value indicated by the MOI size information recorded in Step S305 is recorded as MAI offset information.

  When the MAI offset information is recorded, the file generation unit 160 acquires the MAI held in the work memory 80 in step S110 of the above-described broadcast reception / recording process (FIG. 3), and stores it in the data memory 50 (built-in memory). Then, the stored MAI block size (MAI block size) is acquired and recorded as MAI size information in the combined information area (step S309).

  In this way, when the recording file as shown in FIG. 8B in which the actual data of TOD, MOI, and MAI is stored as one file following the header information is stored in the data memory 50 (built-in memory), the file generation unit 160 acquires the size of the entire file and stores it in the combined information area as file size information (step S310).

  When each of the TOD, MOI, and MAI data generated from the received broadcast data is stored as one file and the combined information indicating the combined relationship is recorded as a header, the file generating unit 160 can arbitrarily record user information. Is recorded in the user information area (step S311), and the process is terminated.

  Through such processing, when a digital television broadcast is recorded in the mobile communication terminal 1, one recording file is generated for one recording operation. This recording file is a single file created by combining multiple types of data conforming to the SD-Video standard. Therefore, in the recording operation fully compliant with SD-Video, TOD and MOI are generated as separate files. Since the MAI is recorded in the data memory 50 (built-in memory) as one file, the recorded file in the mobile communication terminal 1 can be easily managed.

  In addition, since the connection information for managing the connection relationship is recorded in the recording file as a header, the positions and data sizes of the TOD, MOI, and MAI in the generated recording file can be recognized, so the data memory 50 ( Recording files fully compliant with the SD-Video standard can be easily generated from recording files stored in the built-in memory.

  For example, when a recorded file in the data memory 50 (internal memory) is copied or moved to a memory card MC (external memory) attached to the card I / F 60, it is completely SD-Video standard for playback on other playback devices. It is necessary to store in a memory card MC (external memory) in a compliant file format. Even in such a case, since each of TOD, MOI, and MAI can be extracted from the recorded file based on the combined information, the directory structure as shown in FIG. ) Can be reconstructed and copied or moved.

  As described above, by applying the present invention as in the above embodiment, the format required for copying or moving the recorded data to the memory card (external memory) can be easily reconstructed and recorded. Digital television broadcasts can be recorded in a file format that allows easy management in the internal memory of the apparatus. As a result, the processing load on the mobile communication terminal that performed the recording can be reduced while maintaining the versatility that the recorded material can be played back by other devices. The recorded content can be widely used without causing it to occur, and convenience is improved.

  In addition, since the recording file is generated by reflecting copy control generally performed in digital broadcasting, it is possible to perform appropriate copy control when copying or moving the recording file from the built-in memory to the memory card MC. It is possible to improve convenience while protecting the copyright of the content.

  The said embodiment is an example and the application range of this invention is not restricted to this. That is, various applications are possible, and all embodiments are included in the scope of the present invention.

  For example, in the above embodiment, the SD-Video standard is exemplified as an example of a recording format to the memory card. However, if the recording format is such that a plurality of types of data files are generated, the application of the present invention may be applied to the SD-Video standard. It is not limited to the standard. Similarly, the memory card MC is not limited to the SD memory card (trademark), and can be any external memory medium.

  Moreover, although the case where the broadcast program (video) by digital television broadcasting was recorded was illustrated in the said embodiment, it is not restricted to this, For example, this invention is applied to recording of terrestrial digital audio broadcasting (so-called digital radio) etc. May be applied.

  In the above embodiment, the case where the present invention is applied to a mobile communication terminal is illustrated, but the present invention is not limited to a mobile communication terminal as long as it has a digital television broadcast reception / recording function. The present invention can be applied to various portable electronic devices (for example, PDAs (Personal Digital Assistants), digital cameras, personal computers, etc.).

  Such a portable electronic device can be provided in a form to which the present invention is applied in advance, like the mobile communication terminal 1 shown in the above embodiment, and is executed by the control unit 100 of the above embodiment. By applying a program similar to the program, an existing portable electronic device can function as the portable electronic device according to the present invention. Such a program can be provided in any form. The program can be provided by being stored in a recording medium such as a DVD (Digital Versatile Disk) or a memory card, and can be distributed via a communication medium such as the Internet. It can also be provided. The functions and operations described above are realized by applying the program provided in this way to the apparatus and executing the computer (CPU or the like) of the apparatus.

It is a block diagram which shows the structure of the mobile communication terminal concerning embodiment of this invention. It is a functional block diagram which shows the function structure implement | achieved by the control part shown in FIG. It is a flowchart for demonstrating the broadcast reception / recording process concerning embodiment of this invention. FIG. 4 is a flowchart for explaining copy control processing executed in broadcast reception / recording processing shown in FIG. 3. FIG. It is a flowchart for demonstrating the recording file production | generation process performed by the broadcast reception / recording process shown in FIG. It is a figure for demonstrating the data received with the digital television broadcast reception function of the mobile communication terminal shown in FIG. 1, (a) shows the structural example of TS packet sequence, (b) shows TS packet sequence. The example of the digital copy control information inserted is shown. FIG. 2 is a diagram for explaining data generated by the digital television recording function of the mobile communication terminal shown in FIG. 1, wherein (a) shows a configuration example of a TOD packet sequence, and (b) is inserted into the TOD packet sequence. An example of copy control information to be performed is shown. It is a figure for demonstrating the storage place of the data produced | generated by the broadcast reception / recording process shown in FIG. FIG. 6 is a diagram for explaining the data structure of a recording file generated by the recording file generation processing shown in FIG. 5, where (a) shows an example of the data structure of the recording file, and (b) is combined information included in the recording file. An example of the data structure of the area is shown. It is a figure which shows the example of the file structure of the video recording data based on SD-Video specification.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Mobile communication terminal, 10 ... Communication function part, 11 ... Antenna, 12 ... Speaker, 13 ... Microphone, 20 ... Broadcast receiving part, 21 ... Antenna, 30 ... Operation part, 40 ... Display part, 50 ... Data memory ( Internal memory), 60 ... Card I / F, MC ... Memory card (external memory), 70 ... Program memory, 80 ... Work memory, 100 ... Control unit (recording control unit), 110 ... Recording operation determination unit, 120 ... Copy Control discriminating unit 130 ... Recording data generating unit 140 ... Copy control unit 150 ... Data encryption unit 160 ... File generating unit

Claims (6)

It has digital TV broadcast reception and recording functions,
A built-in memory for storing recording data by the recording function;
In a portable electronic device comprising: an interface for reading from and writing to a removable external memory for copying or moving the recorded data stored in the built-in memory;
A recording control unit configured to generate a recording file composed of one file obtained by combining a plurality of types of data generated based on a recording format in the external memory and store the recording file in the built-in memory;
A portable electronic device characterized by that. The plurality of types of data are TOD (Transport Stream Object Data), MOI (Media Object Information), and MAI (Media Object Additional Information) generated based on the SD-Video format.
The recording control means includes
Generate TOD, MOI, MAI based on the received broadcast data, and combine the generated TOD, MOI, MAI to generate the recording file.
The portable electronic device according to claim 1. The recording control means includes
In response to an instruction to start recording, TOD is acquired from the received broadcast data and stored in the built-in memory, and MOI and MAI corresponding to the stored TOD are generated and stored in a predetermined work memory. When,
In response to a recording end instruction, file generation means for combining the MOI and MAI held in the work memory with the TOD stored in the built-in memory and generating the recording file by generating header information indicating the coupling relationship When,
Further comprising
The portable electronic device according to claim 2. The recording control means includes
Copy control information based on digital copy control information included in the received broadcast data is generated, added to the TOD, and further provided with copy control means for performing copy control during recording based on the copy control information.
The portable electronic device according to claim 2 or 3, The portable electronic device is a mobile communication terminal;
The portable electronic device according to any one of claims 1 to 4, wherein the portable electronic device is any one of the above. Read / write to / from the built-in memory that stores the recorded data by the recording function and the removable external memory that records the recorded data stored in the built-in memory in the SD-Video format. And a computer for controlling a portable electronic device equipped with
Triggered by a recording start instruction, generates a TOD from the received broadcast data and stores it in the built-in memory, generates a MOI and a MAI corresponding to the stored TOD, and holds them in a predetermined work memory;
A function of generating copy control information based on digital copy control information included in the received broadcast data, adding the copy control information to the TOD, and performing copy control based on the copy control information;
Triggered by a recording end instruction, a function for generating a recording file by combining the MOI and MAI held in the work memory with the TOD stored in the built-in memory and generating header information indicating the coupling relationship;
A program characterized by realizing.

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