JP2004104752A - Digital broadcast receiver, digital broadcast receiving method and digital broadcast receiving program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a digital broadcast receiver which avoids a dropout in the first portion of a partial TS (transport stream) to be output to an external VCR and avoids generation of a non-recorded part in the external VCR. <P>SOLUTION: TS containing a program received by a digital broadcast receiver is recorded in an HDD (hard disk drive) 401 as partial TS of a program selected by a TS decoder 405. In this case, a CPU 410 generates program incidental information from contents of a PMT (program map table) or the like wherein control information of programs is described and records it in a flash ROM 411. In the program incidental information, copy control information, bit rate information, a CAT (conditional access table), and PID of an EMM (entitlement management message) are described. When partial TS which is used for recording a program with the external VCR 420 is output, the program incidental information is referred, and an update indication of a necessary PMT or the like, a setting indication of recording mode of a VCR, etc. are performed before output of the partial TS. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
According to the present invention, a received transport stream (hereinafter abbreviated as “TS”) is stored as a partial TS, a program included in the stored partial TS is reproduced, and an external storage device is controlled to be stored in the partial TS. The present invention relates to a digital broadcast receiving apparatus for copying a contained program.
[0002]
Here, the partial TS refers to a bit stream obtained by removing TS packets unrelated to one or several specially selected programs from TS packets of MPEG (Moving Picture Experts Group) 2. . (For example, see Non-Patent Document 1)
[0003]
[Prior art]
A digital broadcast receiving apparatus that receives, stores, and reproduces a TS includes, for example, that described in Patent Document 1.
Usually, a plurality of programs are multiplexed in the TS. Since the stored program is the selected one or several programs, the TS packets not related to the stored program are stored as the removed partial TS.
[0004]
Incidentally, in addition to a PAT (Program Association Table) and a PMT (Program Map Table) as information necessary for reproducing the program, the partial TS includes an EMM (Entitlement Management Message) which is individual information describing contract information and the like, and an EMM. The CAT (Conditional Access Table) designating the packet identifier of the TS packet that transmits the TS packet is also multiplexed. The PMT includes DTCP_CCI (Digital Transmission Content Protection_Copy Control Information) that describes information about a digital copy of a program.
[0005]
Further, the PMT also describes bit rate information corresponding to the recording mode of the program.
[0006]
[Patent Document 1]
JP-A-11-168718
[0007]
[Non-patent document 1]
BS Digital Broadcasting Receiver Chapter 9 Sections 9.1.7, 9.1.8, 9.1.9 ARIB STD-B21 1.1st Edition Radio Industries and Business Association
[0008]
[Problems to be solved by the invention]
When the program included in the stored partial TS is output to and stored in an external storage device, the following problem occurs.
FIG. 14A is a diagram schematically illustrating a partial TS stored in the digital broadcast receiving device. The partial TS 101 includes PAT, PMT, CAT, and EMM together with the elementary stream (ES) 102 of the program.
[0009]
The first problem is that when a partial TS is output to an external storage device at time t0 and an instruction is given from a user to record the partial TS, the conventional digital broadcast receiving device interprets the PMT and determines whether or not copying is possible. As shown in FIG. 14B, the partial TS 111 cannot be output until time t3 in order to judge and remove the EMM that should not be output to the external storage device.
[0010]
That is, as shown in FIG. 14A, since the PAT cannot be extracted until time t1, the PID of the PMT cannot be known, so that the PMT is extracted at time t2. It is about 100 ms from time t0 to t2. The PMT is extracted and interpreted, and it is determined whether the ES of the program can be output to an external storage device. However, CAT and EMM that should not be output to an external storage device cannot be removed yet. At time t3, the CAT is extracted, the PID of the EMM is obtained, and the partial TS 111 can be output to the external storage device from time t3 when the EMM can be removed.
[0011]
Therefore, it is not possible to output the ES of the leading program for a maximum of about 10 seconds after receiving the instruction from the user.
The second problem is a problem when recording the partial TS in an external storage device that has received the output of the partial TS stored in the digital broadcast receiving device.
FIG. 15 schematically shows a partial TS when a program A and a program B are continuously output from a conventional digital broadcast receiving apparatus to an external storage device and a partial TS recorded by the storage device. .
[0012]
In the output partial TS 201, the program A is a normal image quality program, and the program B is a high-definition broadcast program. When these are recorded, the recording mode of the program A is recorded in the STD mode and the recording mode of the program B is recorded in the HS mode according to the bit rate information described in the PMT.
In the external storage device, the program A is recorded in the STD mode in response to the input of the partial TS 201. When the program is switched to the program B, the PMT is acquired, interpreted, the recording mode is detected, and Until the recording mode is set, the beginning of the program B cannot be copied. The partial TS 202 recorded in the external storage device has an uncopied area 203.
[0013]
FIG. 16 is a diagram schematically showing a partial TS input to copy the program C to a conventional external storage device and a recording state of the partial TS.
Program B and program D are added to the input partial TS 301 as offset portions before and after program C. In the copy control information described in the PMT or the like, the program C is “Free”, but the program B is described as “No-more-copies”. The external storage device that has received the input of the partial TS 301 interprets the copy control information of the program B in the offset portion and detects “No-more-copies” of the copy control information for a certain period of time. Stop recording automatically. As a result, even if the copy control information of the program C to be originally recorded is “Free”, recording cannot be performed.
[0014]
In order to solve the above-described problem, a first object of the present invention is to provide a digital broadcast receiving apparatus capable of outputting a partial TS in which the ES at the head of the stored partial TS is not lost.
A second object of the present invention is to prevent a partial TS output to an external storage device from being recorded in an external storage device or a part of the partial TS from being changed due to a change in recording mode or copy control information. It is an object of the present invention to provide a digital broadcast receiving apparatus for preventing such a situation.
[0015]
[Means for Solving the Problems]
In view of the above problems, the present invention is a digital broadcast receiving device connected to an external storage device, comprising: a first storage means; an elementary stream that constitutes a program from a received transport stream; And storing the partial transport stream including the control information in the first storage means, and extracting and generating from the control information, program supplementary information for outputting the partial transport stream of the program to the external storage device. A first control unit; a second storage unit that stores the program supplementary information generated by the first control unit in association with a partial transport stream stored in the first storage unit including the program; Control of the partial transport stream including the program stored in the first storage means according to the supplementary information. A second control unit that instructs to update information; and a partial transport stream that is connected to the external storage device and that reads the partial transport stream from the first storage unit after receiving the instruction from the second control unit, and updates the control information. And an interface for outputting to an external storage device.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of a digital broadcast receiving apparatus according to the present invention will be described with reference to the drawings.
(Embodiment 1)
FIG. 1 is a configuration diagram of a digital broadcast receiving apparatus according to a first embodiment of the present invention.
[0017]
The digital broadcast receiving apparatus includes a built-in HDD (Hard Disk Drive) 401, a tuner 402, a demodulator 403, a descrambler 404, a TS decoder 405, an image decoder 406, a monitor 407, and an audio decoder 408. , A speaker 409, a CPU 410, a flash ROM 411, a memory 412, and a digital I / F 413. The digital I / F 413 is connected to a VCR (Videocassette Recorder) 420 as an external storage device in accordance with the IEEE1394 standard.
[0018]
The HDD 401 stores a partial TS including a program instructed to be recorded by a user among programs multiplexed with a TS transmitted from a broadcasting station.
FIG. 2 is a diagram schematically illustrating the partial TS stored in the recording medium HD501 of the HDD 401. Partial TS-I is recorded as file 1, partial TS-II is recorded as file 3, and partial TS-III is recorded as file 6.
Remembered.
[0019]
FIG. 3 is a configuration diagram schematically illustrating, for example, the partial TS-I. The partial TS-II 601 includes a program on channel A. It includes a PAT packet, a PMT packet, and each ES packet of a video, audio, and data of a program, a CAT packet, and an EMM packet. In addition, a SIT (Service Information Table) packet and the like are also included but omitted.
[0020]
The tuner 402 receives a transponder of a frequency designated by an antenna (not shown) under the control of the CPU 410, and outputs the obtained modulated wave to the demodulation unit 403. Demodulation section 403 demodulates the modulated wave and outputs the obtained multiplexed TS packet to descrambler 404. The descrambler descrambles the TS and outputs the descrambled TS to the TS decoder 405. When scramble is not performed on the TS transmitted from the broadcasting station, the demodulated section 403 outputs the directly demodulated TS to the TS decoder 405.
[0021]
The TS decoder 405 decodes the input TS under the control of the CPU 410. When only watching a program, the TS decoder 405 stores tables such as PAT and PMT defined by PSI (Program Specific Information) multiplexed in the TS in the memory 412, and stores an ES packet of audio data. Is output to the audio decoder 408, and the ES packet of the video data is output to the image decoder 406. The audio decoder 408 decodes the audio ES into an audio signal and outputs the audio from the speaker 409. The image decoder 406 decodes the ES of the image into an image signal and outputs it from the monitor 407.
[0022]
When a program is recorded on the HDD 401, the TS decoder 405 extracts, under the control of the CPU 410, ES such as video data and audio data of the program multiplexed on the TS, and PAT, PMT, CAT, EMM, and the like. It is stored as a partial TS. At this time, the content of the DTCP descriptor added to the PMT is created and output from the content of the digital copy control descriptor and the content use descriptor in the PMT.
[0023]
FIG. 4A is a diagram illustrating an example of the contents of the PMT included in the TS input to the TS decoder 405. The contents corresponding to the items in the left column 702 are described in the PMT 701, and the right column 703 is a description thereof.
Here, table_id is a table identifier for extracting the PMT, and is specified in the PAT. The digital copy control descriptor identified by the identifier “0 × C1” and the content use descriptor identified by the identifier “0 × DE” indicate copy control information. Is created.
[0024]
FIG. 4B is a diagram illustrating an example of the content of the PMT of the partial TS stored in the HDD 401. The contents of the DTCP descriptor identified by the identifier “0 × 88” are added to the PMT 711.
Here, Retention_move_mode described in the DTCP descriptor identified by the identifier “0 × 88” of the descriptor_tag is a value indicating a move state. When “0”, the medium is being moved, and when “1”, the medium is not moved. Is shown. DTCP_CCI is a value indicating whether or not copying is possible. When "00" is set, "Free" is set. When "10" is set, "Copy-once" is set. -More-copies ", that is, indicates that copying is no longer possible.
[0025]
Under the control of the CPU 410, the TS decoder 405 sets the DTCP_CCI of the output DTCP descriptor to “01”, that is, “No-more-copies” and outputs the DTCP_CCI when the content of the digital copy control descriptor of the PMT is copyable for only one generation. I do.
The CPU 410 obtains the values of Retention_move_mode and DTCP_CCI described in the DTCP descriptor in the PMT of the partial TS to be output in units of a program or an ES configuring the program, and obtains, from the TS decoder 405, the EMM_PID of the EMM_PID for identifying an EMM packet. The value is acquired from the CAT packet, and stored in the flash ROM 411 in association with the partial TS including the program stored in the HDD 401 as the program accompanying information.
[0026]
FIG. 5 is a diagram showing an example of the program supplementary information stored in the flash ROM 411. The program supplementary information 801 includes copy control information 802 obtained from the PMT and PID information 803 of CAT and EMM. In both pieces of information 802 and 803, information 804 and 805 for distinguishing a partial TS of a program stored in the HDD 401 are described, respectively. In the information 804 and 805 for distinguishing the partial TS of the program, for example, when the program is included in the partial TS-I as shown in FIG. 15, "file 1" which is a file name is described.
[0027]
When instructed to reproduce a program stored in the HDD 401, the TS decoder 405 reads a partial TS including the program from the HDD 401, extracts PAT, PMT, EMM, SIT, and the like, stores the PAT, PMT, EMM, SIT, and the like in the memory 412, and The ES is output to the audio decoder 408, and the video ES is output to the image decoder 406.
The CPU 410 controls each unit according to a control program stored in the flash ROM.
[0028]
When receiving a recording instruction for a program transmitted from a broadcasting station to the HDD 401 from a receiving unit (not shown), the tuner 402 is instructed to select a station, the TS decoder 405 is instructed to record a partial TS in the HDD 401, and the program is transmitted to the flash ROM 411. It instructs recording of additional information.
When receiving a copy instruction of a program included in the partial TS stored in the HDD 401 from the same receiving unit, the CPU 410 acquires the program supplementary information 801 of the partial TS including the program stored in the flash ROM 411, which is stored in the flash ROM 411.
[0029]
When the value of the DTCP_CCI of the copy control information 802 indicates “Copy_once” of “10”, the CPU 410 is prohibited from copying even if it receives the copy instruction of the partial TS recorded in the HDD 401, Is not recorded by the VCR 401. For example, it instructs the image decoder 406 to display on the monitor 407 that “copying is not possible”.
[0030]
When the value of the DTCP_CCI of the copy control information 802 indicates “Copy_once” of “10”, the CPU 410 receives the instruction to move the partial TS recorded in the HDD 401 and stores the value of the Retention_move_mode of the PMT in the digital I / F 413. Is rewritten from “1” to “0”, that is, from “non-move” to “move”, and instructed to rewrite the value of DTCP_CCI from “01” to “10”, that is, from “No-more-copies” to “Copy_once”. I do.
[0031]
When the value of DTCP_CCI is "00", that is, "Free", copying can be performed any number of times, so that it is not necessary to change the copy control information of the PMT.
Further, the CPU 410 notifies the digital I / F 413 of the PID of the CAT and the EMM described in the PID information 803, instructs not to output the CAT and the EMM, and reads the partial TS including the designated program. Instruct.
[0032]
The flash ROM 411 stores a control program for causing the CPU 410 to operate as a control unit. In addition, the TS ancillary information 801 as shown in FIG. 5 associated with the partial TS of each program recorded in the HDD 401 is stored by the TS decoder 405.
The memory 412 stores control information such as PAT and PMT multiplexed on the TS transmitted from the broadcasting station.
[0033]
The digital I / F 413 is connected to a VCR 420 as an external storage device, and outputs a partial TS to the VCR 420 according to a protocol specified by IEEE1394.
The CPU 410 receives, from the CPU 410, an instruction to rewrite the values of DTCP_CCI and Retention_move_mode, which are copy control information of the PMT included in the partial TS, and an instruction to delete the CAT and EMM. The read partial TS is read from the HDD 401, and the partial TS from which the CAT and EMM have been deleted is output to the VCR 420 while updating the contents of the PMT.
[0034]
As described above, since the digital I / F 413 has been notified in advance of the contents to be changed of the PMT, the CAT to be deleted and the PID of the EMM, the digital I / F 413 has the ES constituting the program at the head of the designated partial TS. Can be output to the external VCR 420 without cutting off the head.
When the partial TS 101 shown in FIG. 14A is output, the partial TS 101 can be output from the ES 102 starting at time t0, and the partial TS in which the PMT 105 and the like are updated while the subsequent EMM 103, CAT 104, and the like are deleted can be output. .
[0035]
When a move instruction, that is, when the value of Retention_move_mode is set to “0” and a partial TS is output, the CPU 410 performs output while deleting the partial TS stored in the HDD 401. When all the outputs of the specified partial TS have been output, the CPU 410 deletes the program accompanying information of the partial TS.
[0036]
Next, the operation of the present embodiment will be described with reference to the flowcharts of FIGS. First, the recording operation of the program supplementary information at the time of recording the partial TS of the program specified by the user from the TS transmitted from the broadcasting station to the built-in HDD 401 will be described with reference to the flowchart of FIG.
The CPU 410 waits for an instruction to record a program to the HDD 401 (S902), and instructs the TS decoder 405 to extract the ES, PAT, and the like constituting the program.
[0037]
Upon extracting the PAT (S904), the TS decoder 405 waits for the PMT to be extracted using the PID of the PMT described in the PAT as a filter condition (S906). A digital copy control descriptor and a content use descriptor, which are copy control information described in the extracted PMT, are obtained, and a DTCP descriptor is created based on the information (S908). It is determined whether or not it has been obtained (S910). If it has been acquired, the process proceeds to S918, and if it has not been acquired, the process proceeds to S912.
[0038]
In S912, the TS decoder 405 waits for the extraction of the CAT, and acquires the PID of the EMM described in the CAT (S914). It is determined whether or not the copy control information has been acquired. If the copy control information has not been acquired, the process returns to S904. If the copy control information has been acquired, the process proceeds to S918.
In step S918, the TS decoder 405 records the program ancillary information 801 including the obtained copy control information and PID information such as EMM in the flash ROM 411 in association with the file name of the partial TS recorded in the HDD 401, and ends recording. It is determined whether or not the recording is completed (S920). If the recording is completed, the process is terminated. If the recording is continued, the process returns to S902.
[0039]
Next, an operation of outputting a partial TS including a designated program to the VCR 420 as an external storage device will be described with reference to the flowchart of FIG.
The CPU 410 waits for an instruction to copy or move a program stored in the HDD 401 from the user to the VCR 420 (S1002), and acquires from the flash ROM 411 program supplementary information 801 associated with the designated program.
[0040]
The CPU 410 checks the value of DTCP_CCI of the copy control information 802 in the program supplementary information 801 to determine whether or not the copy control information needs to be changed. That is, if it is "00", no change is required, and if it is a move instruction, the value of DTCP_CCI in the PMT of the partial TS stored in the HDD 401 is changed from "01" to "10". It is necessary to change the value of Retention_move_mode from “1” to “0”. It should be noted that it is "10", and in the case of a copy instruction, the fact that copying is not possible is presented to the user, and the process is terminated (S1006).
[0041]
The CPU 410 moves to S1010 when no change is required, and notifies the digital I / F 413 of the updated contents of the PMT copy control information when a change is required (S1008).
The CPU 410 notifies the digital I / F 413 of the PID of the CAT and the EMM to be deleted from the partial TS (S1010), and instructs reading of the specified partial TS (S1012).
[0042]
The digital I / F 413 reads the specified partial TS from the HDD 401, replaces the PMT in the partial TS with the updated PMT, outputs the partial TS with CAT and EMM deleted to the VCR 420 (S1014), and outputs the partial TS from the HDD 401. The process of S1014 is continued until the reading of the TS is completed (S1016).
[0043]
In this embodiment, the program supplementary information 801 is stored in the flash ROM 411, but may be stored in the HDD 401 as a file separate from the partial TS. For example, the program supplementary information may be stored in the file 4 shown in FIG.
Further, in the present embodiment, the copy control information is described only for the change of the information of the DTCP descriptor of the PMT. However, when outputting the partial TS to the external VCR 420, the copy control information is different from the copy control information in the partial TS. Is output as the copy control information EMI according to IEEE1394. This EMI information is updated in the same manner as when the DTCP_CCI of the DTCP descriptor in the PMT of the partial TS is updated, and is stored in, for example, the file 2 shown in FIG. The EMI information is information conforming to the IEEE 1394 standard.
[0044]
Therefore, when the copy control information is “No-more-copies” in the EMI information, it is necessary to change the value of Retention_move_mode to “0” and change this EMI information to “Copy-once”. Further, in the present embodiment, at the time of recording a program, the program accompanying information is acquired and stored. However, when an external VCR 420 is instructed to output a partial TS, a read instruction to the digital I / F 413 is issued. Prior to this, program accompanying information may be acquired. However, the output of the partial TS to the VCR 420 is delayed by the time required for acquiring the program supplementary information.
(Embodiment 2)
Next, a digital broadcast receiving apparatus according to a second embodiment of the present invention will be described. The configuration of this digital broadcast receiving apparatus is substantially the same as the configuration of the first embodiment, and thus will be described with reference to the configuration diagram of FIG.
[0045]
In this embodiment, the VCR 420 is controlled by the VCR 420 to prevent the program from being unable to be copied when a program included in the partial TS output to the VCR 420 as an external storage device is switched, and to prevent the occurrence of an uncopied area in part. Information is output at a predetermined timing.
Therefore, the following configuration is provided in addition to the configuration of the first embodiment.
[0046]
FIG. 8 is a diagram showing an example of the program supplementary information stored in the flash ROM 411.
The program supplementary information 1101 is information associated with a partial TS stored as a file A 1102 in the HDD 401.
The file A includes a program C that has been reserved and recorded, an offset program B transmitted before the program C, and an offset program D subsequent to the program C. Here, the program D is omitted.
[0047]
The program supplementary information 1101 describes items such as copy information identification 1105 for the program (main part) 1103 and the program B (offset) 1104 that have been reserved and recorded.
The copy information identification 1105 describes “1” in the main part and “0” in the offset as information for classifying the program.
[0048]
The offset value 1106 is a value set in advance, and is a recording time added before and after the main part to completely record the main part, and is obtained by referring to an EIT (Event Information Table).
The EMI 1107 is copy control information indicating whether or not copying is possible, the main part is “Free”, and the offset is “Copy-once”.
[0049]
The bitlet information 1108 defines a recording mode between the standard “STD” and the high image quality “HS”. The main part is equivalent to 24 Mbps (bit per second) corresponding to high image quality, and the offset is equivalent to 12 Mbps corresponding to the standard. It is.
The digital I / F output enable / disable information 1109 is information indicating whether or not output is possible in accordance with the IEEE 1394 standard.
[0050]
The EMI 1107, the bit rate information 1108, and the digital I / F output availability information 1109 are generated from information described in the PMT.
CPU 410 creates program supplementary information 1101 for each partial TS file stored in HDD 401.
When the recorded program is recorded with an offset by program reservation, the CPU 410 writes “1” or “0” to distinguish the main program from the offset.
[0051]
Further, the offset value 1106 is obtained by calculating the offset value from the recording time with reference to the EIT.
The CPU 410 records whether the main part of the EMI 1107 and the offset can be copied from the copy control information of the PMT extracted by the TS decoder 405. Since this information may change over time even in a program, a value that is severely restricted is described.
[0052]
Similarly, bit rate information is also acquired from the PMT and recorded, but the highest value of the bit rate is recorded.
The digital I / F output availability information 1109 is also acquired from the PMT and recorded.
FIG. 9 schematically shows a partial TS of file A corresponding to program supplementary information 1101. The start time of the offset program B is T0, which is "one minute" before the start time T2 of the program C.
[0053]
A time T1 which is a predetermined time N before the time T2 at the head of the program C and a time T3 which is a predetermined time α after the head of the program C are empirically set.
Here, the time N is a time from when the recording state of the VCR 420 is instructed to when the recording operation is stabilized. The time α is a time suitable for using control information such as the PMT of the program C as a default value in the beginning of the program C. The time N and the time α are set in advance as 2 seconds.
[0054]
The operation of the CPU 410 will be described with reference to the flowchart of FIG.
The CPU 410 waits for a copy or move instruction from the accepting unit (not shown) to the external VCR 420 that has designated the user's program (S1302), and the program of the file including the partial TS stored in the HDD 401 corresponding to the program. The additional information 1101 is obtained from the flash ROM 411 (S1304).
[0055]
It is determined whether the copy control information of the main part described in the EMI 1107 is Free and a copy instruction (S1306). If it is "Free", it is determined whether or not the copy control information of the offset is "Free" (S1308). If the offset is "Free", the partial TS is output from the beginning of the offset (S1310), and the process ends. If the offset is not “Free”, output processing of the partial TS of only the main part is performed (S1312).
[0056]
In S1306, if the main part is not “Free”, that is, if it is “Copy-once” and it is “move instruction”, a move process is performed (S1314).
Hereinafter, the operation of the present embodiment will be described with reference to the flowcharts of FIGS. 11 and 12 regarding the output processing of the partial TS from the beginning of the offset.
[0057]
First, the CPU 410 reads out and acquires the PMT and the EMI immediately after the time T3 at which the time α has elapsed from the beginning of the main program C, from the HDD 401 (S1402). The bit rate information of the main part and the offset is acquired from the program supplementary information 1101 (S1404), and it is determined whether both bit rates are the same (S1406). If they are not the same, the recording mode change information corresponding to the main part bit rate is created. When the offset is 12 Mbps and the main part is 24 Mbps, HS recording mode change information is created (S1408).
[0058]
Next, the CPU 410 instructs via the digital I / F 413 to set the recording mode corresponding to the bit rate information of the offset, for example, the recording mode of the STD to the VCR 420 (S1410). Next, an instruction to start recording is instructed to the VCR 420 via the digital I / F (S1412), and the system waits until the recording operation of the VCR 420 is stabilized (S1414). Typically, this stabilization takes about 2-5 seconds.
[0059]
The CPU 410 generates the updated PMT and EMI when the PMT included in the partial TS stored in the HDD 401 is to be changed, or changes the EMI, and sends the updated PMT and EMI to the digital I / F 413 as in the first embodiment. The notification is made (S1416). At the same time, the digital I / F 413 is instructed to start outputting the partial TS to the VCR 420 (S1418).
[0060]
The digital I / F 413 reads the partial TS from the time T0 of the offset program B according to the instruction from the CPU 410 (S1502), and replaces the updated partial PMT and EMI notified from the CPU 410 with the partial TS and outputs the partial TS to the VCR 420. (S1504). Note that the read control information such as the PMT of the partial TS is stored in the memory 412. The CPU 410 notifies the digital I / F 413 as needed when the PMT or the like needs to be changed. The digital I / F 413 outputs the partial TS replaced with the notified updated PMT or the like.
[0061]
The CPU 410 waits for the time T1 (S1506), and when the recording mode change information is created in S1408 (S1508), outputs the created recording mode change information to the VCR 420 via the digital I / F 413. (S1510).
Thus, for example, after the lapse of the time N from the time T1, the recording mode is stably changed from STD (standard rate) to HS (high image quality rate) in the VCR 420.
[0062]
If the recording mode change information has not been created, the process moves to S1512.
In step S1512, the CPU 410 instructs the digital I / F 413 to make necessary changes to the PMT and EMI acquired in step S1402 and set the partial TS to be output. The digital I / F 413 outputs the partial TS to the VCR 420 according to the instruction of the CPU 410. That is, after the time T1, the partial TS in which the PMT and the EMI are set at the time T3 after the elapse of the time α from the beginning of the program C is output to the VCR 420.
[0063]
The CPU 410 waits until time T3 (S1514), updates the PMT and EMI read from the HDD 401 and stored in the memory 412 as necessary, and notifies the digital I / F 413. The digital I / F 413 replaces the PMT or the like notified from the CPU 410 with the PMT or the like in the read partial TS and outputs the same to the VCR 420 (S1516).
[0064]
The digital I / F 413 continues this processing until the output of all the packets of the partial TS is completed (S1518), and ends the processing.
Next, the operation of outputting only the main partial TS to the VCR 420 will be described with reference to the flowchart of FIG.
This processing is to avoid a situation where the main program cannot be copied even if the offset program cannot be copied any more even though the main program can be copied.
[0065]
The CPU 410 acquires the main program bit rate information from the program supplementary information 1101 stored in the flash ROM 411 (S1602), and sets the corresponding recording mode, for example, the HS high-quality recording mode to the VCR 420 when the bit rate information is 24 Mbps. The setting is instructed via the digital I / F 413 (S1604).
[0066]
Subsequently, the CPU 410 instructs the VCR 420 to enter the recording waiting state via the digital I / F 413 (S1606).
Next, the CPU 410 reads out and acquires the PMT and EMI stored immediately after the time T3 of the main program stored in the HDD 401 (S1608).
The digital I / F 413 reads a partial TS from the HDD 401 at time T0 according to an instruction from the CPU 410 (S1610).
[0067]
The CPU 410 waits for the time T1 (S1612), and instructs the digital I / F 413 to set the PMT and EMI immediately after the acquired time T3 to the partial TS with necessary changes (S1614).
In accordance with the instruction from the CPU 410, the digital I / F 413 outputs the partial TS to the VCR 420 (S1616) and instructs the VCR 420 to start recording (S1618).
[0068]
After waiting for time T3 (S1620), the CPU 410 updates the PMT and EMI extracted from the partial TS of the HDD 401 and stored in the memory 412, and notifies the digital I / F 413 of the update. The digital I / F 413 replaces the notified PMT and EMI and outputs the partial TS to the VCR 420 (S1622).
[0069]
The digital I / F 413 continues this process until the output of the partial TS for all the packets of the VCR 420 is completed (S1624), and ends the process.
As described above, the PMT and EMI at the stable time T3 of the main program are output immediately before the start of the recording of the VCR 420, and the main program accompanying the update of the PAT and PMT at the time of switching from the offset to the main program is output. Can be prevented from being omitted, and the main part is not recorded because the EMI information of the offset is not “Free”.
[0070]
Note that the flowchart shown in FIG. 13 is a process according to the description of the copy control information 1107 shown in the program accompanying information 1101 shown in FIG.
The Move process in S1314 basically performs the same process as the output process of the partial TS from the beginning shown in FIGS. 11 and 12, but differs from the case of copying by the VCR 420 in the move process to the VCR 420. Therefore, after the digital I / F 413 reads the partial TS from the HDD 401, the digital I / F 413 deletes the read partial TS from the HDD 401.
[0071]
In the above embodiments, the partial TS is described as being recorded on the HDD 401. However, a random-access large-capacity recording medium such as a DVD-RAM, an SD card, or a semiconductor memory may be used. is there.
Although the partial TS has been described to be recorded in file units, the partial TS may hold information for managing the recording position on the recording medium and may be accessed using this information, and is limited to the file. Not something.
[0072]
【The invention's effect】
As described above, the present invention relates to a digital broadcast receiving apparatus connected to an external storage device, comprising: a first storage unit; an elementary stream that forms a program from a received transport stream; And storing the partial transport stream including the control information of the program in the first storage means, and extracting and generating from the control information the program supplementary information for outputting the partial transport stream of the program to the external storage device. A first control unit that performs the operation, a second storage unit that stores the program supplementary information generated by the first control unit in association with a partial transport stream stored in the first storage unit that includes the program, A partial transport stream including the program stored in the first storage means in accordance with the program supplementary information A second control unit that instructs to update control information, and a partial transport stream that is connected to the external storage device, reads the partial transport stream from the first storage unit after receiving the instruction from the second control unit, and reads the control information. An interface for updating and outputting the updated data to an external storage device is provided. With such a configuration, the interface can know control information to be updated in advance, so that the interface can update the control information from the beginning of the partial transport stream read from the first storage unit and output the control information to the external storage device. it can.
[0073]
The apparatus further comprises receiving means for receiving a program copy or move instruction, wherein the second control means obtains, from the second storage means, program ancillary information corresponding to a partial transport stream including the instructed program. And With such a configuration, it is possible to output a partial transport stream including the designated program to an external storage device.
[0074]
Further, the first control means has a copy control information extracting unit for extracting copy control information described in a Program Map Table included in the control information, and the second control means is included in the program accompanying information. When the copy control information is "copy once", the copy control information change instructing unit instructs to change the copy control information of the Program Map Table to "copy only once" and to change to "move". The interface updates and outputs the contents of the Program Map Table according to the instruction. With such a configuration, a partial transport stream having copy control information indicating "copy once" can be moved to an external storage device.
[0075]
Further, when the interface outputs the partial transport stream with the copy control information of the program map table being “moving”, the second control means deletes the output partial transport stream from the first storage means. When the output is completed, the program further comprises an erasing unit for erasing the program supplementary information stored in the second storage means. With such a configuration, the partial transport stream transferred to the external storage device by the move can be deleted from the own device.
[0076]
Further, the control information includes a Conditional Access Table and an Entrancement Management Message, and the first control means extracts a packet identification identifier of a packet for extracting an Entrancement Management packet from the Entrancement Management Table described in the Conditional Access Table. The second control means has an identification information notifying unit that notifies each of a packet identifier of a Conditional Access Table and an Entitlement Management Message of the packet identification information included in the program supplementary information, and the interface includes: Output partial transport according to the protocol specified in IEEE1394. Is set to be output by removing said Conditional Access Table and the Entitlement Management Message from the stream. With such a configuration, the transport packets that should not be output to the external storage device are removed from the partial transport stream, and the elementary stream of the program cannot be output until the transport packets to be removed are found. Can be avoided.
[0077]
Further, according to the present invention, in the partial transport stream stored in the first storage means, at least two temporally continuous programs are stored, and the first control means includes a program included in the control information. A bit rate information extraction unit that extracts bit rate information described in a map table for each program, wherein the second control unit converts the bit rate information included in the program incidental information stored in the second storage unit into A recording mode instructing unit for acquiring and setting a recording mode corresponding to the bit rate information of the succeeding program when the bit rate information of the preceding program is different from the bit rate information of the succeeding program; When the mode setting instruction is received, an external storage device is provided a predetermined time before the output of the partial transport stream including the program. It has decided to instruct the setting of the recording mode. With such a configuration, it is possible to solve the problem that the recording mode is changed when the program is switched, so that the leading portion of the subsequent program cannot be copied.
[0078]
Further, the predetermined time is a time until the external storage device receives a recording mode setting instruction and a recording operation is stabilized. With such a configuration, it is possible to match the setting timing of the recording mode found empirically.
The partial transport stream stored in the first storage means is recorded by program reservation, and a program preceding the reserved program is added as an offset. An offset extraction unit that extracts the time of the offset portion with reference to the Event Information Table included in the program, and copy control that extracts and generates copy control information of the offset program and the reserved program from the Program Map Table included in the control information An information generation unit, wherein the second control means uses the default value of the initial control information of the reserved program from the start time of the reserved program included in the partial transport stream stored in the first storage means. Extracts control information after a lapse of a predetermined time α When the control information updating unit to be updated and the copy control information of both the reserved program and the offset program are "Free", a recording instruction is issued to the external storage device, and then the partial trans- An output start instructing unit for instructing the output of the port stream, and the external storage device receiving the control information updated by the control information updating unit from a start time of the reserved program, receiving a recording mode setting instruction, and performing a recording operation. An update information notifying unit that instructs to set a partial transport stream before a predetermined time N, which is a time until stabilization, wherein the interface outputs a recording instruction to an external storage device, and then outputs the start of the offset program. , Which outputs a partial transport stream and updates the control information a predetermined time N before the start time of the reserved program It is set to be output is set to the partial transport stream. With such a configuration, the external storage device that has received the output of the partial transport stream can record the reserved program to be copied as a complete partial transport stream.
[0079]
Also, in the present invention, the output start instructing unit, when the copy control information of the reserved program is "Free" and the offset program is "Once", instructs to wait for recording to an external storage device, After the update information notification unit instructs to set the updated control information in the partial transport stream, instructs the output of the partial transport stream of the reserved program to an external recording device, and instructs the start of recording. And With such a configuration, it is possible to avoid a situation where even the reserved program cannot be copied due to the control information indicating that the offset program cannot be copied.
[0080]
The present invention also relates to a digital broadcast receiving method connected to an external storage device, wherein a partial transport stream including an elementary stream constituting a program from a received transport stream and control information of the program is provided. Is stored in a first storage area, and program auxiliary information for outputting a partial transport stream of the program to the external storage device is extracted and generated from the control information, and the first storage area including the program is generated. A first control step of storing the partial transport stream in the second storage area in association with the partial transport stream stored in the first storage area, and controlling the partial transport stream including the program stored in the first storage area in accordance with the program incidental information A second control step for instructing to update information, and the second control step It reads the partial transport stream from said first storage area after receiving the instruction, is set to be an output step of outputting to an external storage device to update the control information. According to such a method, a complete partial transport stream without truncation can be output to the external storage device.
[0081]
Similarly, the present invention relates to a digital broadcast receiving program applied to a digital broadcast receiving device connected to an external storage device, comprising: an elementary stream that constitutes a program from a received transport stream; And storing a partial transport stream including the information in the first storage area, and extracting and generating from the control information program-related information for outputting the partial transport stream of the program to the external storage device. A first control step of storing in the second storage area in association with the partial transport stream stored in the first storage area including the program, and the program stored in the first storage area according to the program supplementary information To instruct to update the control information of the partial transport stream including Each step of a control step and an output step of reading a partial transport stream from the first storage area after receiving the instruction in the second control step, updating control information and outputting the control information to an external storage device, To be executed. When this digital broadcast receiving program is applied to a digital broadcast receiving device having a large-capacity storage device, a complete partial transport stream without truncation can be output to an external storage device.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a digital broadcast receiving apparatus according to a first embodiment of the present invention.
FIG. 2 is a diagram schematically showing a partial TS stored in an HDD according to the embodiment.
FIG. 3 is an example of a configuration diagram of a partial TS-I stored in the HDD of the embodiment.
FIG. 4A is a diagram illustrating an example of the contents of a PMT included in a TS input to the TS decoder according to the embodiment.
(B) is a diagram showing an example of the contents of a PMT included in a partial TS stored in the HDD of the above embodiment.
FIG. 5 is a diagram showing an example of program supplementary information stored in a flash ROM according to the embodiment.
FIG. 6 is a flowchart illustrating a recording operation of the program supplementary information at the time of recording the partial TS on the HDD according to the embodiment.
FIG. 7 is a flowchart illustrating an operation of outputting a partial TS to a VCR according to the embodiment.
FIG. 8 is a diagram showing an example of program supplementary information stored in a flash ROM according to the second embodiment.
FIG. 9 is a schematic diagram showing a partial TS composed of a program C reserved for recording on the HDD and an offset thereof according to the embodiment.
FIG. 10 is a flowchart illustrating an operation of the embodiment.
11 is a flowchart (part 1) for explaining the detailed operation of S1310 in the flowchart of FIG. 10;
FIG. 12 is a flowchart (part 2) for explaining the detailed operation of S1310 in the flowchart of FIG. 10;
FIG. 13 is a flowchart illustrating a detailed operation of S1312 in the flowchart of FIG. 10;
FIG. 14A is a diagram schematically showing a partial TS stored in a digital broadcast receiving device.
(B) is a diagram schematically showing a partial TS output from a conventional digital broadcast receiving device to an external storage device.
FIG. 15 is a diagram schematically illustrating a partial TS output from a conventional digital broadcast receiving device to an external storage device and a partial TS copied by the external storage device.
FIG. 16 is a diagram illustrating a state in which a partial TS output from a conventional digital broadcast receiving device to an external storage device cannot be copied by the external storage device due to its copy control information.
[Explanation of symbols]
401 HDD
402 tuner
403 demodulation unit
404 De Scrambler
405 TS decoder
406 image decoder
407 monitor
408 audio decoder
409 Speaker
410 CPU
411 Flash ROM
412 memory
413 Digital I / F
420 VCR

Claims (11)

A digital broadcast receiving device connected to an external storage device,
First storage means;
A partial transport stream including an elementary stream constituting a program from the received transport stream and control information of the program is stored in the first storage means, and the partial transport of the program is stored in the external storage device. First control means for extracting and generating program supplementary information for outputting a stream from the control information;
A second storage unit for storing the program supplementary information generated by the first control unit in association with a partial transport stream stored in the first storage unit including the program;
Second control means for instructing to update control information of a partial transport stream including the program stored in the first storage means according to the program supplementary information;
An interface connected to the external storage device, for reading a partial transport stream from the first storage device after receiving an instruction from the second control device, updating control information, and outputting the updated control information to the external storage device; A digital broadcast receiving device characterized by the above-mentioned. Further comprising a receiving means for receiving a copy or move instruction of the program,
2. The digital broadcast receiving apparatus according to claim 1, wherein said second control means acquires program supplementary information corresponding to a partial transport stream including a designated program from said second storage means. The first control means includes a copy control information extraction unit that extracts copy control information described in a Program Map Table included in the control information,
The second control means includes:
When the copy control information included in the program ancillary information is “copy once”, an instruction is given to change the copy control information of the Program Map Table to “copy only once” and to “move”. Having a copy control information change instructing unit,
The digital broadcast receiving device according to claim 2, wherein the interface updates and outputs the contents of a Program Map Table according to an instruction. The second control means includes:
When the interface outputs the partial transport stream with the copy control information of the program map table being “moving”, the output partial transport stream is deleted from the first storage means, and when the output is completed, the 4. The digital broadcast receiving apparatus according to claim 3, further comprising an erasing unit for erasing the program supplementary information stored in the storage unit. The control information includes a Conditional AccessTable and an Entrancement Management Message,
The first control means includes:
A packet identification information extraction unit that extracts a packet identifier of an Entlement Management Message described in the Conditional Access Table,
The second control means includes:
An identification information notifying unit that notifies each of packet identifiers of a Conditional Access Table and an Entitlement Management Message of packet identification information included in the program supplementary information,
3. The digital broadcast receiving apparatus according to claim 2, wherein the interface removes the Conditional Access Table and the Entitlement Management Message from a partial transport stream to be output in accordance with a protocol defined in IEEE1394, and outputs the partial transport stream. At least two temporally continuous programs are stored in the partial transport stream stored in the first storage means,
The first control means includes:
A bit rate information extraction unit that extracts bit rate information described in a Program Map Table included in the control information for each program,
The second control means includes:
Obtaining bit rate information included in the supplementary information of the program stored in the second storage means, and when the bit rate information of the preceding program is different from the bit rate information of the subsequent program, the recording corresponding to the bit rate information of the subsequent program; A recording mode instructing unit for instructing mode setting,
2. The interface according to claim 1, wherein upon receiving a recording mode setting instruction, the interface instructs an external storage device to set the recording mode a predetermined time before outputting a partial transport stream including the program. Digital broadcast receiver. 7. The digital broadcast receiving apparatus according to claim 6, wherein the predetermined time is a time until a recording operation is stabilized after the external storage device receives a recording mode setting instruction. The partial transport stream stored in the first storage means is recorded by program reservation, and a program preceding the reserved program is added as an offset,
The first control means includes:
An offset extracting unit that extracts the time of the offset part with reference to the Event Information Table included in the control information;
A copy control information generating unit configured to extract and generate copy control information of the offset program and the reserved program from the Program Map Table included in the control information,
The second control means includes:
The control information after a lapse of a predetermined time α, which is a time that can be used as a basis of the default value of the initial control information of the reserved program from the start time of the reserved program included in the partial transport stream stored in the first storage means, A control information update unit to extract and update;
When the copy control information of both the reserved program and the offset program is “Free”, after instructing the external storage device to record, an output start instruction for instructing the output of the partial transport stream from the beginning of the offset program. Department and
The external storage device receives the control information updated by the control information updating unit from the start time of the reserved program, receives a recording mode setting instruction, and performs a partial transcoding process a predetermined time N before the recording operation is stabilized. Update information notification unit for instructing to set the port stream,
The interface outputs a recording instruction to an external storage device, then outputs a partial transport stream from the beginning of the offset program, and outputs control information updated a predetermined time N before the start time of the reserved program to the partial transport stream. 2. The digital broadcast receiving apparatus according to claim 1, wherein the digital broadcast is set to be output. When the copy control information of the reserved program is “Free” and the offset program is “Once”, the output start instructing unit instructs a wait for recording to an external storage device. After the instruction to set the updated control information in the partial transport stream is issued, the output of the partial transport stream of the reserved program to an external recording device is instructed, and the recording start is instructed. 9. The digital broadcast receiving device according to 8. A digital broadcast receiving method connected to an external storage device,
A partial transport stream including an elementary stream forming a program from the received transport stream and control information of the program is stored in a first storage area, and the partial transport stream of the program is stored in the external storage device. A first control for extracting and generating program accompanying information for outputting the program from the control information and storing the supplementary information in the second storage area in association with the partial transport stream stored in the first storage area including the program Steps and
A second control step of instructing to update control information of a partial transport stream including the program stored in the first storage area according to the program incidental information;
Outputting a partial transport stream from the first storage area after receiving the instruction in the second control step, updating the control information, and outputting the updated control information to an external storage device. Receiving method. A digital broadcast receiving program applied to a digital broadcast receiving device connected to an external storage device,
A partial transport stream including an elementary stream forming a program from the received transport stream and control information of the program is stored in a first storage area, and the partial transport stream of the program is stored in the external storage device. A first control for extracting and generating program accompanying information for outputting the program from the control information and storing the supplementary information in the second storage area in association with the partial transport stream stored in the first storage area including the program Steps and
A second control step of instructing to update control information of a partial transport stream including the program stored in the first storage area according to the program incidental information;
A step of reading a partial transport stream from the first storage area after receiving the instruction in the second control step, updating the control information and outputting the updated control information to an external storage device, Broadcast receiving program.

Images