JP3878565B2 - Digital broadcast receiving apparatus, digital broadcast receiving method, and digital broadcast receiving program - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
In 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 store the partial TS. The present invention relates to a digital broadcast receiving apparatus for copying an included program.
[0002]
Here, the partial TS means a bit stream obtained by removing TS packets not related to one or several specially selected programs from the TS packet of MPEG (Moving Picture Experts Group). . (For example, see Non-Patent Document 1)
[0003]
[Prior art]
An example of a digital broadcast receiving apparatus that receives, stores, and reproduces TS is disclosed in Patent Document 1, for example.
A plurality of programs are usually multiplexed in the TS. Since the stored program is one or several selected programs, TS packets not related to the stored program are stored as a removed partial TS.
[0004]
By the way, in the partial TS, as information necessary for program reproduction, in addition to PAT (Program Association Table) and PMT (Programmapped Table), EMM (Entlement Management Message) which is individual information describing contract information and the like, and EMM The CAT (Conditional Access Table) that specifies the packet identifier of the TS packet that transmits is repeatedly multiplexed. In addition, the PMT includes DTCP_CCI (Digital Transmission Content Protection_Copy Control Information) describing information about a digital copy of a program.
[0005]
The PMT also describes bit rate information corresponding to the program recording mode.
[0006]
[Patent Document 1]
JP-A-11-168718
[0007]
[Non-Patent Document 1]
BS Digital Broadcasting Receiver Chapter 9 9.1.7, 9.1.8, 9.1.9 ARIB
STD-B21 1.1 edition Radio Industry Association
[0008]
[Problems to be solved by the invention]
When a program included in the stored partial TS is output and stored in an external storage device, the following problem occurs.
FIG. 14A is a diagram schematically showing a partial TS stored in the digital broadcast receiving apparatus. The partial TS 101 includes a PAT, a PMT, a CAT, and an EMM together with an elementary stream (ES) 102 of the program.
[0009]
The first problem is that when a user receives an instruction to output and record a partial TS to an external storage device at time t0, the conventional digital broadcast receiving device interprets the PMT and determines whether or not copying is possible. In order to exclude the EMM that should not be output to the external storage device, as shown in FIG. 14B, the partial TS 111 cannot be output until time t3.
[0010]
That is, as shown in FIG. 14A, since the PAT cannot be extracted until time t1, it is impossible to know the PID of the PMT, so that the PMT is extracted at time t2. The time from t0 to t2 is about 100 ms. The PMT is extracted and interpreted, and it is determined whether or not 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. The CAT is extracted at time t3, the PID of the EMM is acquired, and the partial TS 111 can be output to an external storage device from time t3 when the EMM can be removed.
[0011]
Therefore, after receiving an instruction from the user, the ES of the program at the head cannot be output for about 10 seconds at the maximum.
The second problem is a problem at the time of recording the partial TS in the 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 and a partial TS recorded by the storage device when program A and program B are continuously output from the conventional digital broadcast receiving apparatus to an external storage device. .
[0012]
In the output partial TS 201, program A is a normal image quality program, and 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.
The external storage device receives the input from the partial TS 201 and records the program A in the STD mode. However, when the program B is switched to the program B, the PMT is acquired and interpreted to detect the recording mode and Until the recording mode is set, the top portion of 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 a program C to a conventional external storage device and its recording state.
In the input partial TS 301, program B and program D are added 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. Automatically stops recording. As a result, even if the copy control information of the program C to be originally recorded is “Free”, it cannot be recorded.
[0014]
In order to solve the above-described problems, a first object of the present invention is to provide a digital broadcast receiving apparatus that can output a partial TS without a missing ES at the beginning of the stored partial TS.
The second object of the present invention is that the partial TS output to the external storage device cannot be recorded on the external storage device or a part of the partial TS cannot be recorded due to the change of the recording mode or the copy control information. This is to provide a digital broadcast receiving apparatus that prevents this.
[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, the first storage means, an elementary stream constituting a program from the received transport stream, and the program A partial transport stream including control information is stored in the first storage means, and program supplementary information for outputting the partial transport stream of the program to the external storage device is extracted from the control information and generated. First control means, second storage means for storing program supplementary information generated by the first control means in association with a partial transport stream stored in the first storage means including the program, and the program In accordance with the incidental information, the control of the partial transport stream including the program stored in the first storage means is performed. Second control means for instructing to update information and the external storage device, and after receiving an instruction from the second control means, reads the partial transport stream from the first storage means and updates the control information And an interface for outputting to an external storage device.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments 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 Embodiment 1 of a digital broadcast receiving apparatus according to the present invention.
[0017]
The digital broadcast receiver 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 which is an external storage device in accordance with the IEEE 1394 protocol.
[0018]
The HDD 401 stores a partial TS including a program instructed to be recorded by the user among programs multiplexed on the TS transmitted from the broadcasting station.
FIG. 2 is a diagram schematically showing a partial TS stored in the recording medium HD501 of the HDD 401. As shown in FIG. Partial TS-I is stored as file 1, partial TS-II is stored as file 3, and partial TS-III is stored as file 6.
[0019]
FIG. 3 is a configuration diagram schematically showing the partial TS-I, for example. Partial TS-II 601 includes a channel A program. It includes a PAT packet, a PMT packet, program video, audio, and data ES packets, a CAT packet, and an EMM packet. In addition to this, SIT (Service Information Table) packets and the like are included but omitted.
[0020]
The tuner 402 receives a transponder having a frequency designated by an antenna (not shown) under the control of the CPU 410, and outputs the obtained modulated wave to the demodulator 403. Demodulation section 403 demodulates the modulated wave and outputs the obtained multiplexed TS packet to de-scrambler 404. The descrambler de-scrambles the TS and outputs it to the TS decoder 405. When the TS transmitted from the broadcasting station is not scrambled, the demodulated TS is output directly from the demodulator 403 to the TS decoder 405.
[0021]
The TS decoder 405 decodes the input TS under the control of the CPU 410. When only viewing 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 ES packets of audio data Is output to the audio decoder 408, and an ES packet of 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 ES, such as video data and audio data of the program multiplexed on the TS, PAT, PMT, CAT, EMM, and the like under the control of the CPU 410. Store as a partial TS. At this time, the contents of the DTCP descriptor added to the PMT are created and output from the contents 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. In the PMT 701, contents corresponding to the items in the left column 702 are described, 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. From these contents, the contents of the DTCP descriptor Is created.
[0024]
FIG. 4B is a diagram illustrating an example of the contents 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 descriptor_tag identifier “0 × 88” is a value indicating the move state. When it is “0”, it is “moving”, and when it is “1”, it is not moving. Is shown. DTCP_CCI is a value indicating whether copying is possible. When it is “00”, it is “Free”, when it is “10”, it is “Copy-once”, that is, it can be copied only once, and when it is “01”, it is “No”. -More-copies ", that is, no more copies.
[0025]
When the content of the PMT digital copy control descriptor can be copied for only one generation 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 it. To do.
The CPU 410 acquires the value of Retention_move_mode and DTCP_CCI described in the DTCP descriptor in the PMT of the partial TS to be output for each program or ES unit constituting the program, and from the TS decoder 405, the EMM_PID of the EMM_PID that identifies the 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 program supplementary information.
[0026]
FIG. 5 is a diagram showing an example of program supplementary information stored in the flash ROM 411. The program supplementary information 801 includes copy control information 802 acquired from the PMT, and PID information 803 of CAT and EMM. Both pieces of information 802 and 803 describe information 804 and 805 for distinguishing the partial TS of the program stored in the HDD 401, respectively. In the information 804 and 805 for distinguishing the partial TS of the program, for example, as shown in FIG. 15, when the program is included in the partial TS-I, “file 1” as the file name is described.
[0027]
When the TS decoder 405 is instructed to reproduce the program stored in the HDD 401, the TS decoder 405 reads out the partial TS including the program from the HDD 401, extracts PAT, PMT, EMM, SIT, etc., and stores them in the memory 412 to store the audio. 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 an instruction to record a program transmitted from the broadcasting station to the HDD 401 from a reception unit (not shown), the tuner 402 is instructed to select a channel, the TS decoder 405 is instructed to record a partial TS in the HDD 401, and the program to the flash ROM 411 is instructed. Instruct to record incidental information.
When the CPU 410 receives an instruction to copy 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.
[0029]
Since the copy is prohibited even if the CPU 410 receives a copy instruction of the partial TS recorded in the HDD 401 when the value of DTCP_CCI of the copy control information 802 indicates “Copy_once” of “10”, the copy is prohibited. The VCR 401 does not record. For example, the image decoder 406 is instructed to display “incapable of copying” on the monitor 407.
[0030]
When the CPU 410 receives “Copy_once” with a DTCP_CCI value of “10” in the copy control information 802 and receives a partial TS move instruction recorded in the HDD 401, the value of the PMT Retension_move_mode is received in the digital I / F 413. Is changed from “1” to “0”, that is, “not moving” to “move”, and the DTCP_CCI value is changed from “01” to “10”, that is, “No-more-copies” to “Copy_once”. To do.
[0031]
When the value of DTCP_CCI is “00”, that is, “Free”, copying can be performed any number of times, so there is no need to change the PMT copy control information.
In addition, the CPU 410 notifies the digital I / F 413 of the PIDs of CAT and EMM described in the PID information 803, instructs not to output the CAT and EMM, and reads the partial TS including the designated program. Instruct.
[0032]
The flash ROM 411 stores a control program for the CPU 410 to operate as a control unit. The TS decoder 405 stores program supplementary information 801 as shown in FIG. 5 associated with the partial TS of each program recorded in the HDD 401.
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 that is an external storage device, and outputs a partial TS to the VCR 420 according to a protocol defined in IEEE1394.
When receiving 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 from the CPU 410, an instruction to read the designated partial TS is received. The read partial TS is read from the HDD 401, and the partial TS from which CAT and EMM are 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 previously received notification of the contents to be changed in the PMT, the CAT to be deleted, and the PID of the EMM, the ES constituting the program at the head portion of the designated partial TS. Can be output to an external VCR 420 without interruption.
When the partial TS 101 shown in FIG. 14A is output, it can be output from the ES 102 starting at time t0, and the partial TS updated with the PMT 105 etc. can be output while deleting the subsequent EMM 103, CAT 104, etc. .
[0035]
When a partial TS is output with the move instruction, that is, the value of Retention_move_mode set to “0”, the CPU 410 performs output while deleting the partial TS stored in the HDD 401. When all the outputs of the designated partial TS have been output, the CPU 410 deletes the program supplementary information of the partial TS.
[0036]
Next, the operation of this embodiment will be described with reference to the flowcharts of FIGS. First, a recording operation of program supplementary information at the time of recording a partial TS of a program designated by the user from a TS transmitted from the broadcasting station to the built-in HDD 401 will be described with reference to a 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]
When the TS decoder 405 extracts the PAT (S904), the TS decoder 405 waits for the PMT extraction using the PID of the PMT described in the PAT as a filter condition (S906). Whether the digital copy control descriptor and the content use descriptor, which are copy control information described in the extracted PMT, are acquired, and a DTCP descriptor is created based on the information (S908), and the EMM PID is acquired. It is determined whether or not (S910). If acquired, the process proceeds to S918, and if not 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 copy control information has been acquired. If it has not been acquired, the process returns to S904, and if it has been acquired, the process proceeds to S918.
In S918, the TS decoder 405 records the program supplementary information 801 including the acquired 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 the recording ends. (S920), the process is terminated when the recording is completed, and the process returns to S902 if the recording is continued.
[0039]
Next, an operation of outputting a partial TS including a program designated by the VCR 420 which is 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 in the VCR 420 from the user (S1002), and obtains program supplementary information 801 associated with the designated program from the flash ROM 411.
[0040]
The CPU 410 determines whether or not the copy control information needs to be changed by looking at the value of DTCP_CCI of the copy control information 802 in the program supplementary information 801. That is, if it is “00”, no change is required and “10”, and in the case of 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”. If it is “10” and a copy instruction is given, the fact that copying is not possible is presented to the user and the process ends (S1006).
[0041]
The CPU 410 proceeds to S1010 when no change is required, and notifies the digital I / F 413 of the update contents of the PMT copy control information when the change is required (S1008).
The CPU 410 notifies the digital I / F 413 of the PID of CAT and EMM to be deleted from the partial TS (S1010), and instructs the reading of the instructed partial TS (S1012).
[0042]
The digital I / F 413 reads the instructed partial TS from the HDD 401, replaces the PMT in the partial TS with the updated PMT, outputs the partial TS from which CAT and EMM have been deleted to the VCR 420 (S1014), and outputs the partial TS from the HDD 401. The process of S1014 is continued until the TS reading is completed (S1016).
[0043]
In the present embodiment, the program supplementary information 801 is stored in the flash ROM 411, but may be stored in the HDD 401 as a separate file from the partial TS. For example, program supplementary information may be stored in the file 4 shown in FIG.
Further, in this embodiment, the copy control information has been described only for changing the information of the DMT descriptor of the PMT. However, when the partial TS is output to the external VCR 420, the copy control information is different from the copy control information in the partial TS. The copy control information EMI according to IEEE 1394 is output. This EMI information is updated in the same manner as 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 that conforms 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 to change this EMI information to “Copy-once”. In the present embodiment, program supplementary information is acquired and stored when a program is recorded. 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 to acquire the program supplementary information.
(Embodiment 2)
Next, a second embodiment of the digital broadcast receiving apparatus according to the present invention will be described. The configuration of this digital broadcast receiving apparatus is almost the same as the configuration of the first embodiment, and will be described with reference to the configuration diagram of FIG.
[0045]
In this embodiment, the VCR 420 is controlled in order to prevent a copy from being made when a program included in the partial TS output to the VCR 420, which is an external storage device, is switched or a partial copy area is not generated. Information is output at a predetermined timing.
For this reason, in addition to the structure of the said Embodiment 1, it has the following structures.
[0046]
FIG. 8 is a diagram showing an example of program supplementary information stored in the flash ROM 411.
The program supplementary information 1101 is information associated with the partial TS stored as the file A 1102 in the HDD 401.
The file A includes a program C that has been pre-recorded, an offset program B that was transmitted before the program C, and an offset program D that follows 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 program B (offset) 1104 that have been reserved and recorded.
In the copy information identification 1105, “1” in the main part and “0” in the offset are described as information for classifying the program.
[0048]
The offset value 1106 is a preset value, is a recording time added before and after the main part in order to completely record the main part, and is obtained with reference to an EIT (Event Information Table).
The EMI 1107 is copy control information indicating whether copying is possible, the main part is “Free”, and the offset is “Copy-once”.
[0049]
Bitlet information 1108 defines a recording mode of standard “STD” and high image quality “HS”, and the main part is equivalent to 24 Mbps (bit persecond) corresponding to high image quality, and the offset is equivalent to 12 Mbps corresponding to standard. It is.
The digital I / F output enable / disable information 1109 is information indicating whether or not output can be performed in accordance with the IEEE 1394 standard, and both the main part and the offset are possible.
[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.
The CPU 410 creates program supplementary information 1101 for each partial TS file stored in the HDD 401.
When the recorded program is recorded with an offset by program reservation, the CPU 410 describes “1” or “0” in order to distinguish the main part from the offset.
[0051]
In addition, the offset value 1106 is obtained by referring to the EIT and obtaining the offset value from the recording time.
The CPU 410 records whether or not the main part of the EMI 1107 and the offset can be copied from the PMT copy control information extracted by the TS decoder 405. Since this information may change over time even within a program, a severely limited value is described.
[0052]
Similarly, bit rate information is acquired from the PMT and recorded, but the highest bit rate value is recorded.
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 the 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 that is a predetermined time N before the start time T2 of the program C and a time T3 that is a predetermined time α after the start of the program C are set empirically.
Here, the time N is a time until the recording operation is stabilized after an instruction to change the recording state of the VCR 420 is issued. The time α is an appropriate time for using control information such as PMT of the program C as a default value for the head portion of the program C. Time N and time α are set in advance as 2 seconds, respectively.
[0054]
The operation of the CPU 410 will be described using the flowchart of FIG.
The CPU 410 waits for a copy or move instruction from the reception unit (not shown) to the external VCR 420 designated by the user (S1302), and the program of the file including the partial TS stored in the HDD 401 corresponding to the program Accompanying information 1101 is acquired from the flash ROM 411 (S1304).
[0055]
It is determined whether the copy control information of the main content described in the EMI 1107 is Free and a copy instruction is given (S1306). If it is “Free”, it is determined whether or not the offset copy control information is “Free” (S1308). If the offset is “Free”, the partial TS is output from the beginning of the offset (S1310), and the process is terminated. If the offset is not “Free”, only the main part of the partial TS is output (S1312).
[0056]
In S1306, if the main part is not “Free”, that is, if it is “Copy-once”, and if it is “Move instruction”, move processing 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 head of the offset.
[0057]
First, the CPU 410 reads and acquires from the HDD 401 the PMT and EMI immediately after the time T3 when the time α has elapsed from the beginning of the program C, which is the main part (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 or not both bit rates are the same (S1406). If they are not the same, recording mode change information corresponding to the bit rate of the main part 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 the VCR 420 to set the recording mode corresponding to the offset bit rate information, for example, the STD recording mode, via the digital I / F 413 (S1410). Next, the VCR 420 is instructed to start recording via the digital I / F (S1412), and waits for the recording operation of the VCR 420 to be stabilized (S1414). Usually, this stabilization takes about 2 to 5 seconds.
[0059]
As in the first embodiment, 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 when the EMI is changed, and generates it in the digital I / F 413. Notification is made (S1416). At the same time, the digital I / F 413 is instructed to start output of 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), replaces it with the updated PMT and EMI notified from the CPU 410, and outputs the partial TS to the VCR 420. (S1504). Control information such as the PMT of the read partial TS is stored in the memory 412. The CPU 410 notifies the digital I / F 413 at any time 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), the created recording mode change information is output to the VCR 420 via the digital I / F 413. (S1510).
Thus, after time N has elapsed from time T1, for example, 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 proceeds to S1512.
In step S1512, the CPU 410 instructs the digital I / F 413 to make a change necessary for 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 in accordance with an instruction from the CPU 410. That is, after time T1, a partial TS set with PMT and EMI at time T3 after the elapse of time α from the beginning of the program C is output to the VCR 420.
[0063]
The CPU 410 waits for 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 it to the VCR 420 (S1516).
[0064]
The digital I / F 413 continues this process until the output of all packets of the partial TS is completed (S1518), and ends the process.
Next, the operation of outputting only the main part partial TS to the VCR 420 will be described with reference to the flowchart of FIG.
This process avoids a situation where the main program cannot be copied when the main program can be copied but the offset program cannot be copied any more.
[0065]
The CPU 410 obtains the bit rate information of the main part from the program supplementary information 1101 stored in the flash ROM 411 (S1602). When the corresponding recording mode, for example, the bit rate information is 24 Mbps, the HS high image quality recording mode is set in the VCR 420. The setting is instructed via the digital I / F 413 (S1604).
[0066]
Subsequently, the CPU 410 instructs the VCR 420 to enter a recording standby state via the digital I / F 413 (S1606).
Next, the CPU 410 reads and acquires PMT and EMI immediately after time T3 of the main program stored in the HDD 401 (S1608).
In response to an instruction from the CPU 410, the digital I / F 413 reads the partial TS from the HDD 401 from time T0 (S1610).
[0067]
The CPU 410 waits for time T1 (S1612), makes necessary changes to the PMT and EMI immediately after the acquired time T3, and instructs the digital I / F 413 to set the partial TS (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]
The CPU 410 waits for time T3 (S1620), and notifies the digital I / F 413 when the PMT and EMI extracted from the partial TS of the HDD 401 and stored in the memory 412 are updated. 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 processing until the output of all packets of the VCR 420 is completed for the partial TS (S1624), and ends the processing.
In this way, the PMT and EMI at the stable time T3 of the main program are output immediately before the recording of the VCR 420 is started, and the main program accompanying the update of the PAT and PMT when switching from the offset to the main program. It is possible to prevent the beginning part of the video from being lost or the main part not being recorded because the EMI information of the offset is not “Free”.
[0070]
The flowchart shown in FIG. 13 is processing according to the description of the copy control information 1107 shown in the program supplementary information 1101 shown in FIG.
The Move process in S1314 is basically the same as the partial TS output process from the beginning shown in FIGS. 11 and 12, but unlike the case of copying with the VCR 420, the move process is performed on the VCR 420. Therefore, after the digital I / F 413 reads the partial TS from the HDD 401, the read partial TS is deleted from the HDD 401.
[0071]
In each of the above embodiments, the partial TS is recorded on the HDD 401. However, it is a matter of course that the storage medium may be a randomly accessible large-capacity recording medium such as a DVD-RAM, an SD card, or a semiconductor memory. is there.
Further, although the partial TS has been described as being recorded in units of files, the partial TS may hold information that manages the recording position on the recording medium and can be accessed using this information, and is limited to a file. It is not a thing.
[0072]
【The invention's effect】
As described above, the present invention is a digital broadcast receiving apparatus connected to an external storage device, the first storage means, an elementary stream that constitutes a program from the received transport stream, and the program A partial transport stream including the control information of the program is stored in the first storage means, and program auxiliary information for outputting the partial transport stream of the program to the external storage device is extracted from the control information and generated. First storage means for storing the program supplementary information generated by the first control means in association with the partial transport stream stored in the first storage means including the program, A partial transport stream including the program stored in the first storage means according to the program supplementary information Second control means for instructing to update the control information, and connected to the external storage device, and after receiving the instruction from the second control means, reads the partial transport stream from the first storage means, And an interface for updating and outputting to an external storage device. With this configuration, the interface can know in advance the control information to be updated, so that the control information can be output to the external storage device while updating the control information from the beginning of the partial transport stream read from the first storage means. it can.
[0073]
In addition, the information processing apparatus further includes reception means for receiving an instruction to copy or move the program, and the second control means obtains program supplementary information corresponding to a partial transport stream including the instructed program from the second storage means. It is said. With such a configuration, a partial transport stream including an instructed program can be output to an external storage device.
[0074]
The first control unit includes a copy control information extraction unit that extracts copy control information described in a Program Map Table included in the control information, and the second control unit is included in the program supplementary information. When the copy control information is “one copy only”, the copy control information change instruction unit for instructing the program map table to change the copy control information to “one copy only” and “move”. The interface updates the contents of the Program Map Table according to the instructions and outputs the updated contents. With this configuration, it is possible to move a partial transport stream having copy control information for “copying only once” to an external storage device.
[0075]
Further, when the interface outputs a partial transport stream with the copy control information of the program map table set to “move”, the second control means deletes the outputted partial transport stream from the first storage means. When the output is completed, it further includes 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]
The control information includes a conditional access table and an entity management message, and the first control means extracts a packet identifier for extracting an identification management message described in the conditional access table. The second control means has an identification information notification unit for notifying each packet identifier of Conditional Access Table and Entity Management Message of the packet identification information included in the program supplementary information, and the interface , Partial transport output according to the protocol specified in IEEE 1394 Is set to be output by removing said Conditional Access Table and the Entitlement Management Message from the stream. With this configuration, it is impossible to output a program elementary stream until a transport packet that should not be output to an external storage device is removed from the partial transport stream and a transport packet to be removed is found. Can be avoided.
[0077]
In the present invention, the partial transport stream stored in the first storage means stores at least two programs continuous in time, and the first control means includes the Program included in the control information. A bit rate information extracting unit that extracts the bit rate information described in the Map Table for each program; and the second control unit stores the bit rate information included in the program supplementary information stored in the second storage unit. A recording mode instructing unit for instructing to set a recording mode corresponding to the bit rate information of the succeeding program when the bit rate information of the preceding program and the succeeding program is different from each other; When the mode setting instruction is received, an external storage device is set 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 eliminate the inconvenience that the recording mode is changed when the program is switched and the head portion of the subsequent program cannot be copied.
[0078]
The predetermined time is a time from when the external storage device receives a recording mode setting instruction until the recording operation is stabilized. With such a configuration, it is possible to match the timing of setting 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. The first control means includes control information An offset extraction unit that extracts the time of the offset portion with reference to the Event Information Table included in the copy control, and a 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, and the second control unit uses a 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 unit. Control information after a predetermined time α has passed When the copy control information of the control information update unit to be updated and the reserved program and the offset program are both “Free”, a recording instruction is given to the external storage device, and then the partial transfer is started from the head of the offset program. An output start instructing unit for instructing output of a port stream, and the control information updated by the control information updating unit, when the external storage device receives a recording mode setting instruction from the start time of the reserved program, An update information notification unit for instructing to set a partial transport stream before a predetermined time N, which is a time until stabilization, and the interface outputs a recording instruction to an external storage device, and then starts the offset program The control information that was output a partial transport stream from and updated N times before the scheduled program start time 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]
Further, in the present invention, when the copy control information of the reserved program is “Free” and the offset program is “Once”, the output start instruction unit instructs the external storage device to wait for recording, The update information notifying unit instructs to set the updated control information in the partial transport stream, and then instructs the output of the partial transport stream of the reserved program to an external recording device, and instructs the start of recording. It is said. With such a configuration, it is possible to avoid a situation in which even the reserved program cannot be copied due to the control information 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, the 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 area, and the program storage information for outputting the partial transport stream of the program to the external storage device is extracted from the control information and generated, and the first storage area including the program is generated. A first control step of storing in the second storage area in association with the partial transport stream stored in the control, and control of the partial transport stream including the program stored in the first storage area according to the program supplementary 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. By such a method, a complete partial transport stream can be output to the external storage device without interruption.
[0081]
Similarly, the present invention is a digital broadcast receiving program applied to a digital broadcast receiving apparatus connected to an external storage device, an elementary stream constituting a program from the received transport stream, and control of the program A partial transport stream including information is stored in the first storage area, and program auxiliary information for outputting the partial transport stream of the program to the external storage device is extracted from the control information and generated. 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 in accordance with the program supplementary information The instruction to update the control information of the partial transport stream including Each step of the control step and the output step of reading the partial transport stream from the first storage area after receiving the instruction in the second control step, updating the control information and outputting it to an external storage device Let's make it run. When this digital broadcast receiving program is applied to a digital broadcast receiving apparatus incorporating a large-capacity storage device, a complete partial transport stream can be output to an external storage device without interruption.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of Embodiment 1 of a digital broadcast receiving apparatus according to the present invention.
FIG. 2 is a diagram schematically showing a partial TS stored in the HDD according to the embodiment.
FIG. 3 is an example of a configuration diagram of a partial TS-I stored in the HDD according to 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 figure which shows an example of the content of PMT contained in the partial TS memorize | stored in HDD of the said embodiment.
FIG. 5 is a diagram showing an example of program supplementary information stored in the flash ROM of the embodiment.
FIG. 6 is a flowchart for explaining a recording operation of program supplementary information at the time of recording a partial TS on the HDD according to the embodiment.
FIG. 7 is a flowchart for explaining an operation of outputting a partial TS to the VCR according to the embodiment.
FIG. 8 is a diagram showing an example of program supplementary information stored in the flash ROM of the second embodiment.
FIG. 9 is a schematic diagram showing a partial TS including a program C that is reserved and recorded in the HDD of the embodiment and its offset.
FIG. 10 is a flowchart illustrating the operation of the embodiment.
FIG. 11 is a flowchart (part 1) illustrating a detailed operation of S1310 in the flowchart of FIG.
FIG. 12 is a flowchart (part 2) for explaining the detailed operation of S1310 in the flowchart of FIG.
FIG. 13 is a flowchart for explaining the 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 apparatus.
(B) is the figure which showed typically partial TS output to the external memory | storage device from the conventional digital broadcast receiver.
FIG. 15 is a diagram schematically showing a partial TS output from a conventional digital broadcast receiving apparatus to an external storage device and a partial TS copied by the external storage device.
FIG. 16 is a diagram for explaining a state in which a partial TS output from a conventional digital broadcast receiving apparatus to an external storage device can no longer be copied by an external storage device according to the copy control information.
[Explanation of symbols]
401 HDD
402 tuner
403 Demodulator
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 receiver connected to an external storage device,
First storage means;
A partial transport stream including an elementary stream that configures 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;
Second storage means for storing the program supplementary information generated by the first control means in association with the partial transport stream stored in the first storage means including the program;
Second control means for instructing to update the control information of the partial transport stream including the program stored in the first storage means according to the program supplementary information;
An interface that is connected to the external storage device, reads a partial transport stream from the first storage means after receiving an instruction from the second control means, updates the control information, and outputs the updated control information to the external storage device; A digital broadcast receiver characterized by that. A reception unit for receiving an instruction to copy or move the program;
2. The digital broadcast receiving apparatus according to claim 1, wherein the second control unit obtains program supplementary information corresponding to a partial transport stream including the designated program from the second storage unit. 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
An instruction to change the copy control information of the Program Map Table to "one copy only" and to "move" when the copy control information included in the program supplementary information is "one copy only" A copy control information change instruction unit
3. The digital broadcast receiving apparatus according to claim 2, wherein the interface updates and outputs the contents of the 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 set to “move”, the outputted partial transport stream is deleted from the first storage means, and when the output is completed, the output is completed. 4. The digital broadcast receiving apparatus according to claim 3, further comprising an erasure unit for erasing the program supplementary information stored in the storage means. The control information includes a Conditional Access Table and an Entity Management Message.
The first control means includes
A packet identification information extraction unit that extracts a packet identifier of the entity management message described in the conditional access table;
The second control means includes
An identification information notification unit for notifying the packet identifiers of the Conditional Access Table and the Entity Management Message of the 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 Entity Management Message from the partial transport stream to be output in accordance with a protocol defined in IEEE 1394 and outputs the result. The partial transport stream stored in the first storage means stores at least two programs continuous in time,
The first control means includes
A bit rate information extraction unit that extracts the bit rate information described in the Program Map Table included in the control information for each program;
The second control means includes
The bit rate information included in the program supplementary information stored in the second storage means is acquired, and when the bit rate information of the preceding program and the subsequent program are different, the recording corresponding to the bit rate information of the subsequent program It has a recording mode instruction section for instructing mode setting
2. The interface according to claim 1, wherein when receiving an instruction to set a recording mode, the interface instructs an external storage device to set the recording mode a predetermined time before the output of a partial transport stream including the program. Digital broadcast receiver. 7. The digital broadcast receiver according to claim 6, wherein the predetermined time is a time from when the external storage device receives a recording mode setting instruction until a recording operation is stabilized. 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 extraction unit that extracts the time of the offset portion with reference to the Event Information Table included in the control information;
A copy control information generating unit 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;
The second control means includes
Control information after elapse of a predetermined time α, which is a time that can be used based on 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 for extracting and updating;
When the copy control information for both the reserved program and the offset program is “Free”, a recording start instruction is given to the external storage device, and then an output start instruction is given to output a partial transport stream from the beginning of the offset program And
The control information updated by the control information update unit is received from the start time of the reserved program when the external storage device receives a recording mode setting instruction, and a partial transfer is performed a predetermined time N before the recording operation is stabilized. An 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 the control information updated a predetermined time N before the start time of the reserved program is transmitted to the partial transport stream. 2. The digital broadcast receiving apparatus according to claim 1, wherein the digital broadcast receiving apparatus is set to output. When the copy control information of the reserved program is “Free” and the offset program is “Once”, the output start instruction unit instructs the external storage device to wait for recording, and the update information notification unit The start of recording is instructed by instructing the output of the partial transport stream of the reserved program to an external recording device after instructing to set the updated control information in the partial transport stream. 9. The digital broadcast receiver according to 8. A digital broadcast receiving method connected to an external storage device,
A partial transport stream including an elementary stream that configures a program from the received transport stream and control information of the program is stored in the first storage area, and the partial transport stream of the program is stored in the external storage device Is generated by extracting the program supplementary information for outputting the program from the control information and storing it in the second storage area in association with the partial transport stream stored in the first storage area including the program. Steps,
A second control step instructing to update the control information of the partial transport stream including the program stored in the first storage area according to the program supplementary information;
A digital broadcast comprising: an output step of reading a partial transport stream from the first storage area after receiving an instruction in the second control step, updating the control information, and outputting the updated control information to an external storage device; Reception 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 that configures a program from the received transport stream and control information of the program is stored in the first storage area, and the partial transport stream of the program is stored in the external storage device Is generated by extracting the program supplementary information for outputting the program from the control information and storing it in the second storage area in association with the partial transport stream stored in the first storage area including the program. Steps,
A second control step instructing to update the control information of the partial transport stream including the program stored in the first storage area according to the program supplementary information;
A digital that causes a computer to execute each step including an output step of reading a partial transport stream from the first storage area after receiving an instruction in the second control step, updating control information and outputting the control information to an external storage device Broadcast reception program.

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