JP2015095875A - Limited reception broadcast apparatus and receiver thereof and method of performing limited reception broadcast - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent increase of standby power on a relevant receiver even when total amount of EMM increases by efficiently acquiring the EMM.SOLUTION: The latest EMM for notifying a piece of contract information is transmitted for a certain period of time after being multiplied with video-audio signals as a broadcast signal in plural TSs. The EMM is multiplied with each of the TSs being displaced from each other with a predetermined pattern. In each of the TSs, a piece of control information representing a multiplication pattern of the EMM is transmitted being included in the broadcast TS.

Description

  The present embodiment relates to a conditional access broadcast device that limits viewers by transmitting and receiving personal information (EMM: Entitlement Management Message) including contract information in digital broadcasting, a reception device thereof, and a conditional access broadcast method.

  For conditional access broadcasts, the latest EMM for notifying contract information (contract information including work key) is multiplexed and transmitted along with video and audio signals in the broadcast TS (Transport Stream) of all channels. There is a method in which an EMM is acquired at the same time when the broadcast service is received by the receiving device, and update processing is performed. As described above, since it is necessary to always hold the latest personal contract information, the corresponding receiving apparatus periodically performs energization control even during a standby time other than when the viewer receives an EMM when viewing a program.

ARIB STD-B25, 6.2, Radio Industries Association ARIB TR-B15, 6.2, Radio Industries Association

  By the way, with the recent increase in consumer awareness of the power supply situation and power saving, consideration for environmental performance has become increasingly indispensable for broadcast receivers. On the other hand, in the limited reception broadcasting, it is necessary to update to the latest EMM, and in order to receive the EMM on the receiving device side, the energization control must be performed periodically. As the number of subscribers increases, the total amount of EMM increases. For this reason, when there is an upper limit in the EMM transmission band, the time required for one EMM acquisition generally tends to be longer (the EMM transmission cycle is longer). As a result, the energization time of the corresponding receiving device becomes longer and the power consumption increases. In addition, when the reception resource of the TS processing unit used for EMM reception is shared with other broadcast media reception processing or the like, the energization time required for one EMM acquisition cannot be secured, and the EMM is difficult to be updated.

  The present embodiment has been made in view of the above-described problem. A limited reception broadcast apparatus capable of efficiently acquiring an EMM and suppressing an increase in power consumption of the corresponding reception apparatus even when the total amount of the EMM is increased, and the reception apparatus thereof An object is to provide a limited reception broadcasting method.

  In order to solve the above-described problem, the present embodiment multiplexes and transmits the latest EMM (Entitlement Management Message) for notifying contract information together with video and audio signals in a multi-channel broadcast TS (Transport Stream) for a certain period. In the conditional access broadcast, the broadcast device side multiplexes the EMMs on the broadcast TSs of the channels while shifting them in a predetermined pattern, and sends control information indicating the EMM multiplexing pattern to the broadcast TSs on the channels. The receiving apparatus side obtains the control information from any one of the plurality of channels, determines the multiplexing pattern of the EMM of the receiving channel from the control information, and performs the multiplexing. The channel that can secure the EMM reception period is detected from the determination result of the conversion pattern, and the detected channel is detected. It is set as the aspect which sets the electricity supply for updating the said EMM with respect to a channel.

The block diagram which shows the structure of the broadcasting apparatus for conditional access which concerns on 1st Embodiment. The block diagram which shows one structure of the receiving terminal device which receives the broadcast signal transmitted from the broadcasting apparatus shown in FIG. The figure which shows the data structure of the control information for the EMM update incorporated in the SI information generation part of the broadcasting apparatus shown in FIG. The timing diagram which shows the transmission timing of EMM transmitted with the several channel of the broadcasting apparatus shown in FIG. The flowchart which shows the flow of the electricity supply control of the receiver shown in FIG. The figure which shows an example of the electricity supply control NG message displayed on a screen, when EMM cannot be received correctly in the said embodiment. The figure which shows the data structure of the control information for EMM update incorporated in the SI information generation part of the broadcasting apparatus for conditional access which concerns on 2nd Embodiment. The timing diagram which shows the transmission timing of EMM transmitted by the multiple channel of the broadcasting apparatus which concerns on 2nd Embodiment. The flowchart which shows the flow of the electricity supply control of the receiving terminal device for receiving EMM transmitted at the timing shown in FIG.

  Hereinafter, embodiments will be described with reference to the drawings.

(First embodiment)
With reference to FIGS. 1 to 6, a broadcast system for limited reception according to the first embodiment will be described.

  FIG. 1 is a block diagram illustrating a configuration of a broadcast apparatus 100 for limited reception according to the first embodiment. In FIG. 1, reference numerals 10A, 10B, 10C, and 10D denote program signal generation units in units of programs (organization channels).

  In the program signal generation unit 10A, the video signal and the audio signal of the broadcast content are encoded by the video encoding unit 111 and the audio encoding unit 112, respectively. The encoded video signal and audio signal are converted into PES packets by PES (Packetized Elementary Stream) units 113, 114, and 115, respectively, if there is a caption / superimpose.

  On the other hand, information related to the broadcast content program is incorporated into SI information generated by an SI (Service Information) information generation unit 116. Further, the contract information in the personal information is incorporated into the EMM information generated by the EMM generation unit 117. The SI information and EMM information generated in this way are divided into predetermined sections by the sectioning units 118 and 119 and stored.

  The outputs of the PES units 113 to 115 and the section units 118 and 119 are sent to the multiplexing unit 120 as 1-channel broadcast data. Although not shown, the program signal generation units 10B, 10C, and 10D of other channels are configured in the same manner, and the broadcast data of each channel is sent to the multiplexing unit 120. That is, the broadcast data of each channel is multiplexed as an n-channel broadcast TS by the multiplexing unit 120, converted to a code matching the transmission path by the transmission path encoding unit 121, and transmitted as a broadcast signal.

  Here, the EMM information generated by the EMM generation unit 117 is divided into predetermined sections by the sectioning unit 119 and then delayed by the specified time and the delay unit 123 specified by the control unit 122. 120. In addition, the SI information generation unit 116 receives from the control unit 122 a script indicating the transmission timing of the EMM information of the same channel, and incorporates it into the SI information.

  In the configuration of the above-described embodiment, the EMM generation unit 117, the sectioning unit 119, and the delay unit 123 are provided for each TS. However, EMM information may be generated by sharing among a plurality of TSs. In addition, a plurality of TSs may be supplied with a delay for a specified time. Also in this case, the delay amount follows the instruction from the control unit 122.

  FIG. 2 is a block diagram showing a system configuration of the broadcast receiving terminal device 200 according to the present embodiment. The broadcast receiving terminal device 200 includes a tuner unit 211, a LAN / modem unit 212, an input / output processing unit 221, an NVRAM (Non-Volatile Random Access Memory) 222, a ROM (Read Only Memory) 223, a RAM (Random Access Memory) 224, CPU (Central Processing Unit) 225, descrambler 226, HDD interface 227, security module interface unit (SM-I / F) 228, TS (Transport Stream) processing unit 230, audio decoding unit 231, video decoding unit 232, OSD (On -Screen Display) processing unit 233 and the like, and a speaker, a display (not shown), and the like, which are integrated or separated.

  Tuner unit 211, LAN / modem unit 212, input / output processing unit 221, NVRAM 222, ROM 223, RAM 224, CPU 225, descrambler 226, HDD interface unit 227, security module interface unit 228, TS processing unit 230, audio decoding unit 231, video decoding unit The unit 232, the OSD processing unit 233, and the like are connected to the bus 240 and can communicate with each other.

  The tuner unit 211 performs a process of selectively receiving a transmission channel of broadcast media transmitted from a broadcast station and performing demodulation and error correction decoding. The input / output processing unit 221 is used for input of a control signal from the user (channel selection by the tuner unit) through a remote controller or the like. The NVRAM 222 holds information set by the user, reservation information, and the like, for example. The ROM 223 stores an operation program, for example. The CPU 225 executes an operation program stored in the ROM 223. The RAM 224 is used as a working memory when the CPU 225 executes the operation program.

  A hard disk device (HDD) 234 is appropriately connected to the HDD interface unit 227. Through the HDD interface unit 227, it becomes possible to select a program for which a recording instruction has been directly given to the received broadcast signal by the user or to be reserved for recording, and store it in the HDD 234 connected externally.

  A security module 229 is connected to the security module interface 228. The security module 229 stores a unique ID number and an encryption / decryption key. The encryption / decryption key is used to decrypt the encrypted content received by the tuner unit 211.

  The descrambler 226 acquires a unique ID number and an encryption / decryption key from the security module 229 via the security module interface 228. The descrambler 226 decrypts the broadcast signal using the acquired encryption / decryption key. Here, the security module 229 is external to the broadcast receiving terminal device 200 and described as a module such as an independent detachable card such as an IC card. However, the security module 229 is embedded in the receiver and embedded. It may be provided by a chip or software.

  The TS processing unit 230 selects a predetermined service that has been multiplexed in the TS (Transport Stream) format and is generally designated from a plurality of services (broadcast programs) via the input / output processing unit 221 from a remote controller or the like. Then, the video and audio signals constituting the program are demultiplexed, depacketed to return to the respective compressed signals, and output to the audio decoding unit 231 and the video decoding unit 232. The audio decoding unit 231 decodes, for example, a compressed MPEG-2 AAC audio encoded signal output from the TS processing unit 230 and outputs an audio signal to the speaker. The video decoding unit 232 compresses the H.264 output from the TS processing unit 230. H.264 / AVC, MPEG-2 and other video encoded signals are decoded and a video signal is output. The OSD processing unit 233 performs a graphic output generated by a CPU or the like on the video signal output from the video decoding unit 232 and a superimposition process, and outputs a video signal for displaying a video on a monitor (display).

  In the present embodiment, for the sake of explanation, a plurality of tuner units 211 (for example, three are installed and assumed to correspond to three types of broadcasting media (terrestrial digital broadcasting, BS broadcasting, CS broadcasting)), a plurality of TS processing units 230. (For example, it is assumed that two are installed and shared by three types of broadcast media reception processes). In the case of receiving processing of two other types of broadcasting services other than the broadcasting media for which EMM information is acquired (such as real-time viewing and recording program reservation execution), the installed TS processing unit 230 is occupied. Therefore, it cannot be used for EMM reception of the broadcast media. The present embodiment is characterized in that EMM reception is efficiently performed in other time zones while avoiding such time zones that cannot be used for EMM reception.

  The following describes EMM transmission / reception processing according to the present embodiment in the broadcasting device 100 and the receiving terminal device 200 configured as described above.

  FIG. 3 shows an example of the data structure of control information that is newly defined and described for the EMM in the NIT (Network Information Table) information in the SI information generation unit 116. That is, this control information is a newly defined syntax with the name “CA_emm_offset_descriptor ()”, and the information in the target TS is described in “descriptor ()” in the second descriptor area of the NIT. Is transmitted. This description is based on the standard of ARIB STD-B25, 6.2.

  The following are assumed as specific examples of contents. “CA_System_id” is a 16-bit field indicating conditional access system identification, and identifies the CA system. “Original_start_time” is a 24-bit field, and designates the start time of energization control as a reference in units of days. Encode with 6 4-bit binary-coded decimal numbers (BCD). “Number_of_offset_patterns” is an 8-bit field and represents the total number of offset patterns. “Time_offset” is a 16-bit field and describes an offset time of the start time of the energization control in the TS with respect to the start time of the energization control as a reference. Specify the offset time for “original_start_time” in the range of 0 hours to +24 hours. These 16 bits are encoded in 4 bits binary decimal number (BCD), each of the offset time of 10 hours, 1 hour, 10 minutes and 1 minute. “Power_supply_period” is an 8-bit field, and specifies a continuous energization time from the start time of energization control in the TS. The 16 bits encode four consecutive energization times of 10 hours, 1 hour, 10 minutes, and 1 minute in 4-bit binary-coded decimal (BCD).

  Here, the CA_EM_TS descriptor described in ARIB STD-B25 assumes EMM transmission in a specific TS in the network in an emergency or the like, and there is only one EMM stream transmission pattern. Therefore, conventionally, EMM transmission timing between a plurality of TSs is simultaneous and does not have an offset value, but according to the present embodiment, an EMM transmission timing is provided between a plurality of TSs, and this pattern is changed. It is possible to efficiently communicate to the receiving terminal device. As a result, according to the control information based on the syntax, the EMM information can be transmitted with a shift of one hour, for example, as shown in FIG. Thereby, the continuous energization time zones of the respective channels can be shifted from each other.

  On the other hand, when the receiving terminal device 200 receives a broadcast signal having an offset in EMM transmission timing between a plurality of TSs as described above, the TS processing unit 230 efficiently energizes according to the flowchart shown in FIG. Specify and execute a controllable time zone and TS.

  In FIG. 5, when reception of a broadcast signal is started, SI information is extracted from a broadcast TS of an arbitrary channel, and NIT update is detected (step S11), a descriptor of “CA_emm_offset” is analyzed (step S12). ), The continuous energization time zone is confirmed (step S13). Here, it is determined whether there is a program recording reservation in the continuous energization time zone of the selected channel (step S14). Here, whether or not “program reservation” is present is determined by setting a recording reservation or energization control setting for a broadcast service of other media in the continuous energization time zone (time zone from the energization start time to the prompt energization time) with the offset pattern. Check if exists.

  If there is a program reservation in the confirmed continuous energization time zone in step S14, the offset pattern of the next channel is confirmed (steps S15 and S16). This process is repeated, and when a channel with no program reservation is confirmed in the continuous energization time zone, energization control is set for that channel (step S17), and the series of processes is terminated.

  As a result of confirming the offset patterns of all channels in step S15, if any channel has a program reservation and the energization control setting cannot be performed, as shown in FIG. It may not be possible to update and the program of Broadcast A may not be fully used. It may be improved by deleting unnecessary recording reservations other than Broadcast A. ” S18), a series of processing ends.

  As described above, according to the present embodiment, in the broadcasting apparatus 100, the same EMM transmission timing is transmitted at a predetermined interval between TSs of a plurality of channels, and the transmission pattern information is incorporated into SI information. The corresponding receiving terminal apparatus 200 detects EMM transmission pattern information from the SI information of the receiving channel, and can select a channel from which EMM can be acquired based on this pattern information. For this reason, in the receiving terminal device 200, the EMM can be acquired flexibly and efficiently according to circumstances, and it is possible to reduce contract information update opportunity loss and power consumption.

  In addition, when a plurality of tuners / transmission path decoding units for a target broadcast are also provided, a plurality of TS processing units that can be used are used to perform different TSs in a shorter time than a predetermined energization time. EMM update processing can also be performed.

(Second Embodiment)
With reference to FIGS. 7 to 9, a broadcast system for limited reception according to the second embodiment will be described. However, since the configuration of the broadcasting device and the receiving terminal device is the same as the configuration of the first embodiment shown in FIGS. 1 and 2, the description thereof is omitted.

  This embodiment is characterized in that the offset value of the EMM transmission pattern is set on a daily basis. FIG. 7 shows an example of the data structure of control information newly defined and described for EMM in the NIT (Network Information Table) information in the present embodiment. In this example, unlike the first embodiment, it is assumed that all EMM transmission TSs are transmitted in the same pattern, and these EMM transmission start times can be set on a daily basis. That is, this control information is newly defined with the name “CA_emm_offset_descriptor ()”, and the target information is described in “descriptor ()” in the first descriptor area of the NIT and transmitted as common within the network.

  The following are assumed as specific examples of contents. First, “CA_System_id” indicates a conditional access system identification in a 16-bit field and identifies a CA system. “Emm_offset_pattern_update” is a 16-bit field that indicates the update date of the EMM transmission operation pattern, and is encoded with the lower 16 bits of MJD (modified Julian date). “Pattern_duration” is a 9-bit field and indicates the number of days that the same EMM transmission pattern continues. “Original_start_time” is a 24-bit field, and designates the start time of energization control as a reference in units of days. Encode with 6 4-bit binary-coded decimal numbers (BCD). “Number_of_offset_patterns” is an 8-bit field and represents the total number of offset patterns. “Time_offset” is a 16-bit field and describes an offset time of the energization control start time in the TS with respect to the reference energization control start time. Specify the offset time for “original_start_time” in the range of 0 hours to +24 hours. These 16 bits are encoded in 4 bits binary decimal number (BCD), each of the offset time of 10 hours, 1 hour, 10 minutes and 1 minute. “Power_supply_period” is an 8-bit field, and specifies a continuous energization time from the energization control start time in the TS. The 16 bits encode four consecutive energization times of 10 hours, 1 hour, 10 minutes, and 1 minute in 4-bit binary-coded decimal (BCD).

  With the control information based on the syntax, the EMM information can be transmitted with a shift of, for example, one hour, as shown in FIG. 8, in each channel broadcast TS (A to D). Thereby, the continuous energization time zones of the respective channels can be shifted from each other.

  On the other hand, when the receiving terminal device 200 receives a broadcast signal having an offset in the EMM transmission timing between a plurality of TSs as described above, the TS processing unit 230 efficiently energizes according to the flowchart shown in FIG. Determine the controllable date and time and execute it.

  In FIG. 9, when reception of a broadcast signal is started, SI information is extracted from a broadcast TS of an arbitrary channel, and NIT update is detected (step S21), the descriptor of “CA_emm_offset” is analyzed (step S22). ), The date at the current time is acquired (step S23), the number of days elapsed from the operation pattern update date is calculated (step S24), the latest offset pattern is specified (step S25), and the continuous energization time zone is determined. After confirmation (step S26), it is determined whether there is a program reservation in the continuous energization time zone (step S27). Here, the determination of “there is a program reservation?” Is determined by setting a recording reservation or energization control setting for a broadcast service of other media in the continuous energization time zone (the energization energization time period from the energization start time) with the offset pattern. Check if exists. However, the unit of confirmation is the same number of consecutive transmission days.

  That is, if there is a program reservation, it is determined whether the same number of consecutive days has ended (step S28). If not, the process proceeds to the next day (step S29), and the confirmation process in step S27. repeat. In step S28, if the same number of consecutive days has ended, it is determined whether the determination of all offset patterns has ended (step S30). If not, the process proceeds to the next offset pattern confirmation process. (Step S31). In the determination of whether or not there is a program reservation in the continuous energization time zone of the offset pattern, if a continuous energization time zone without a program reservation is detected, the energization control is set (step S32), and the series of processing ends. To do. If it is determined in step S30 that a program reservation has been made for all offset patterns, the energization control NG message shown in FIG. 6 is presented, and the series of processing ends.

  According to the above embodiment, since the offset value of the EMM transmission pattern is set on a daily basis, the processing resource for energization control is ensured in the same time period, for example, because the recording reservation for daily continuous drama is set. Even when this is difficult, the energization control for acquiring EMM more flexibly and efficiently can be performed.

  As described above, the present embodiment is not limited to the above-described embodiment as it is, and can be embodied by modifying the components without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

DESCRIPTION OF SYMBOLS 100 ... Broadcast apparatus for conditional access, 10A, 10B, 10C, 10D ... Program signal production | generation part, 111 ... Video coding part, 112 ... Audio | voice coding part, 113, 114, 115 ... PES (Packetized Elementary Stream) conversion part, 116: SI (Program Specific Information / Service Information) information generation unit, 117: EMM generation unit, 118, 119 ... sectioning unit, 120 ... multiplexing unit, 121 ... transmission path encoding unit, 122 ... control unit, 123 ... Delay part,
DESCRIPTION OF SYMBOLS 200 ... Broadcast receiving terminal device 211 ... Tuner part 212 ... LAN / modem part 221 ... Input / output processing part 222 ... NVRAM (Non-Volatile Random Access Memory) 223 ... ROM (Read Only Memory), 224 ... RAM (Random Access Memory), 225 ... CPU (Central Processing Unit), 226 ... Desrambler, 227 ... HDD interface, 228 ... Security module interface unit (SM-I / F), 229 ... Security module, 230 ... TS (Transport Stream) Processing unit, 231 ... Audio decoding unit, 232 ... Video decoding unit, 233 ... OSD (On-Screen Display) processing unit, 234 ... Hard disk device (HDD), 240 ... Bus

Claims (7)

In a conditional access broadcasting device that multiplexes and sends the latest EMM (Entitlement Management Message) for notifying contract information together with video and audio signals in a plurality of TS (Transport Stream) for a certain period of time,
Multiplexing means for shifting and multiplexing the EMM in each TS in a predetermined pattern;
A conditional access broadcast apparatus comprising control information transmission means for transmitting control information indicating the multiplexing pattern of the EMM in each of the TSs by incorporating the control information in the broadcast TS.   2. The conditional access broadcasting apparatus according to claim 1, wherein the control information transmission means transmits the EMM multiplexing pattern control information as a part of program related information of broadcast content. A receiving apparatus for limited reception broadcasting in which the latest EMM (Entitlement Management Message) for notifying contract information is multiplexed with video and audio signals in a plurality of TSs (Transport Streams) for a certain period and transmitted as broadcast signals. ,
When the EMM is multiplexed and shifted in a predetermined pattern with respect to each of the plurality of TSs, and control information indicating the multiplexing pattern of the EMMs is incorporated into the broadcast TS and transmitted with each of the plurality of TSs,
Obtaining means for obtaining the control information from any reception channel of the plurality of TSs;
Discrimination means for discriminating the multiplexing pattern of the EMM of the received TS from the control information;
Detecting means for detecting a TS capable of securing the EMM reception period from the determination result of the multiplexing pattern;
A receiving apparatus comprising: energization means for setting energization for updating the EMM with respect to the TS detected by the detection means.   The receiving device according to claim 3, further comprising an error presenting unit that presents an energization control error message when the TS that can secure the EMM reception period cannot be detected by the detecting unit. In a limited reception broadcasting method in which the latest EMM (Entitlement Management Message) for notifying contract information is multiplexed and transmitted together with video and audio signals in a plurality of TS (Transport Stream) for a certain period of time,
On the broadcast side, the EMMs are shifted and multiplexed in a predetermined pattern with respect to each of the TSs of the TS, and control information indicating the multiplexing pattern of the EMM is embedded in the broadcast TS and transmitted in each of the TSs,
On the receiving side, the control information is acquired from any one of the plurality of TSs, the multiplexing pattern of the EMM of the reception TS is determined from the control information, and the EMM is determined from the determination result of the multiplexing pattern. A limited reception broadcasting method for detecting a TS capable of securing a reception period and setting energization for updating the EMM for the detected TS.   6. The conditional access broadcasting method according to claim 5, wherein the control information transmits the EMM multiplexing pattern control information as part of broadcast related program related information.   6. The conditional access broadcasting method according to claim 5, wherein an error message of energization control is presented when a TS capable of securing the EMM reception period cannot be detected on the receiving side.

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