CN101682725A - Digital broadcasting system and data processing method - Google Patents
Digital broadcasting system and data processing method Download PDFInfo
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- CN101682725A CN101682725A CN200880018229A CN200880018229A CN101682725A CN 101682725 A CN101682725 A CN 101682725A CN 200880018229 A CN200880018229 A CN 200880018229A CN 200880018229 A CN200880018229 A CN 200880018229A CN 101682725 A CN101682725 A CN 101682725A
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Abstract
A digital broadcasting system and a data processing method are disclosed. A time zone identifier is inserted into program table information of a broadcasting signal and the broadcasting signal is transmitted/received. The digital broadcasting system can calculate a local time of a region, in which the digital broadcasting system is located, using the time zone identifier. Accordingly, although theposition of the digital broadcasting system is changed, it is possible to process the broadcasting signal related to the local time without an error.
Description
Technical field
The present invention relates to digit broadcasting system and data processing method.
Background technology
The digit broadcasting system that can transmit various broadcasted contents has begun to be widely used.For example, owing to residual sideband (VSB) delivery plan is used as standards for digital broadcasting in North America and Korea S, so the user can send/receive various broadcast programs.Use single-carrier scheme in North America and Korea S as adopted this VSB delivery plan of standards for digital broadcasting.Broadcast receiver system obtains the necessary system information of transmission/reception broadcasting by program and system information protocol from broadcast transmission system.
Summary of the invention
Technical problem
The purpose of this invention is to provide a kind of digit broadcasting system and data processing method at channel variation and noise stalwartness.
Another object of the present invention provide a kind of can additional code be handled and the mobile service data that will encode send to digit broadcasting system and the data processing method that receiving system is improved the receiving ability of receiving system by carrying out for mobile service data.
Another object of the present invention provide a kind of can by in the presumptive area that given data is inserted into the data area and the agreement by transmitter and receiver send digit broadcasting system and the data processing method that data are improved the receiving ability of receiving system.
Further purpose of the present invention provides a kind of can the reply according to the digit broadcasting system and the data processing method that move the time change that receives.
Technical solution
In order to realize these purposes and other advantages according to the object of the invention, as embody and generalized description herein, a kind of data processing method comprises receiving broadcast signal, and this broadcast singal comprises the listing information of the time zone identifier with zone that broadcast receiver system is positioned at.Resolve this listing information, and obtain time zone identifier and broadcast receiver system the local zone time in zone and the time difference between the standard time.From time zone identifier and the local zone time that should the zone and the time difference between the standard time, obtain the local zone time in the zone that broadcast receiver system was positioned at.
This data processing method can comprise: based on the local zone time that is obtained, handle with by the relevant information of local zone time in the information of broadcast receiver system processing.
This listing information can be system time table (STT).
This listing information may further include polarity information (polarity information), polarity information from the local zone time of time difference indication time zone identifier be early than or be later than the standard time.
Listing information can comprise according to the local zone time of time zone identifier and the time difference between the standard time.
The acquisition of local zone time can comprise storage time zone identifier and with the corresponding local zone time in time zone by time zone identifier sign, and according to the time zone identifier that is obtained obtain storage local zone time in any one.
According to a further aspect in the invention, a kind of data processing method comprises the mobile service data and the broadcasted content that comprise the listing information with time zone identifier multiplexing, and output broadcasting stream.This broadcasting stream is modulated, and modulated broadcasting stream is sent out.
By being interweave mobile service data and main business data of unit with the data set, can obtain broadcasting stream.
According to a further aspect in the invention, a kind of digit broadcasting system comprises tuner, and this tuner receives the broadcast singal that comprises the time zone identifier, and output is by the channel of user's selection.And, the mobile service data of demodulator demodulation in the output broadcast singal, and export demodulated broadcasting stream, the demodulation multiplexer demultiplexing is from the broadcasting stream of demodulator output.Listing information decoding device is from the listing information acquisition time zone identifier by the demodulation multiplexer demultiplexing, and decoder decode is by the broadcasting stream of this demodulation multiplexer demultiplexing.And display unit shows the broadcasted content that flows according to by the broadcasting of decoder decode, and controller use time zone identifier acquisition local zone time, and handles the information relevant with this broadcast singal according to this local zone time.
This digit broadcasting system may further include memory, this memory stores time zone identifier and with the corresponding local zone time in time zone by time zone identifier sign, and controller can obtain to be stored in the local zone time in the memory any one according to the time zone identifier that is obtained.
If memory stores is by the listing information of listing information decoding device decoding, then the listing information that this controller can control store changes according to local zone time and stores.
This digit broadcasting system may further include from the user and receives the control signal be used to export broadcast program guide information, and this controller can be controlled broadcast program guide information and outputs to display unit according to local zone time.
If receive the control signal that is used to export local zone time from the user, then this controller can output to display unit with local zone time.
According to a further aspect in the invention, a kind of data processing method comprises: with listing information with to comprise the mobile service data of broadcasted content multiplexing, this listing information comprise digital broadcast receiving system time in time zone and the time difference between the standard time; And output broadcasting stream, and send the broadcast singal that obtains by this output broadcasting stream of modulation.
If receive this signal, then from received broadcast singal, obtain listing information, resolve this listing information, and obtain the time difference.In addition, from this time difference, obtain the local zone time in the zone that this broadcast system is positioned at.
Beneficial effect
Provide robustness according to digit broadcasting system of the present invention and data processing method at channel variation and noise.
This digit broadcasting system and data processing method can send to the receiving ability that receiving system is improved receiving system by the mobile service data of carrying out the additional code processing for mobile service data and will encode.
This digit broadcasting system and data processing method can by in the presumptive area of given data being inserted the data area and the agreement by transmitter and receiver send the receiving ability that data are improved receiving system.
And, can send and receive the identifier that is respectively applied for parsing mobile service data and main business data according to digit broadcasting system of the present invention and data processing method.
Description of drawings
Fig. 1 is the block diagram that illustrates according to the digital broadcasting transmission system of the embodiment of the invention;
Fig. 2 is the detailed diagram that the example of service duplexer is shown;
Fig. 3 is the block diagram that the example of transmitter is shown;
Fig. 4 is the block diagram of example that the preprocessor of Fig. 3 is shown;
Fig. 5 is the view that the example of RS frame encoding process is shown;
Fig. 6 and 7 is the views that are illustrated in according to the data structure of previous and next stage of the data deinterlacing device in the digital broadcasting transmission system of the present invention;
Fig. 8 is the view that the processing of dividing the RS frame is shown;
Fig. 9 is the view that the operation of bag multiplexer is shown;
Figure 10 is the detailed diagram that the example of piece processor is shown;
Figure 11 is the detailed diagram that the example of symbol encoder is shown;
Figure 12 is the view that the example of symbol interleaver is shown;
Figure 13 is the detailed diagram that the example of piece processor is shown;
Figure 14 is the detailed diagram that another example of piece processor is shown;
Figure 15 is the view that the example of the output of the symbol-byte converter in the piece being aimed at according to setting up standard is shown;
Figure 16 is the concrete block diagram that grid coding module example is shown;
Figure 17 is the view that illustrates with the piece processor of grid coding module cascade;
Figure 18 is the view that piece processor and another example of network code module are shown;
Figure 19 illustrates the block diagram of example of carrying out the piece processor of encoding process with the 1/N encoding rate;
Figure 20 illustrates the detailed diagram of piece processor according to another embodiment of the present invention;
Figure 21 is the schematic diagram that receives the group formatter in the body region that sends parameter and received transmission parameter is inserted data set;
Figure 22 illustrates to receive the block diagram that sends parameter and handle the example of received transmission parameter by the processing identical with mobile service data;
Figure 23 illustrates to be expanded the block diagram that makes the packet format device can insert the structure of the packet format device that sends parameter;
Figure 24 illustrates to be expanded so that allow to send the block diagram that parameter is inserted the Synchronous multiplexer in the field sync segment zone;
Figure 25 illustrates the block diagram of the structure of digital broadcast receiving system according to an embodiment of the invention;
Figure 26 is the view that the error correction decoding processing of RS frame decoder is shown;
Figure 27 is the view that the system time table (STT) that can be used for the ATSC system is shown;
Figure 28 illustrates the view that broadcast receiver system obtains the example of temporal information;
Figure 29 illustrates the view that comprises according to the temporal information of the broadcast singal of the temporal information in zone;
Figure 30 is the view that the temporal information shown in Figure 26 is shown;
Figure 31 illustrates the conceptual view that can realize moving the broadcast receiver system receiving broadcast signal that receives;
Figure 32 is the flow chart of diagram from the example of broadcast singal receiving time information;
Figure 33 illustrates from the view of broadcast singal reception according to the temporal information and the example of output current time in time zone;
Figure 34 illustrates the view that receives the example of the temporal information in time zone and output broadcast message from broadcast singal;
Figure 35 is the view that the example of broadcast receiver system is shown; And
Figure 36 is the flow chart of the example of diagram receiving broadcast signal.
Embodiment
In the employed term of description of the invention, the main business data with can be corresponding by the data that fixing receiving system receives, and can comprise audio/video (A/V) data.More specifically, the main business data can comprise high definition (HD) and other A/V data of single-definition (SD) level, and can comprise the needed various data type of data broadcasting.And given data is corresponding with the data of knowing in advance according to the prearranged agreement between receiving system and transmitting system.In addition, in the present invention, mobile service data can comprise at least one in mobile service data, pedestrian's business datum, the hand-held business datum, and for being referred to as mobile service data for simplicity.Herein, mobile service data is not only corresponding with mobile/pedestrian/hand-held business datum (M/P/H business datum), but can also comprise the business datum of any kind with mobile or portable nature.Therefore, mobile service data according to the present invention is not limited only to the M/P/H business datum.
Above-mentioned mobile service data can be corresponding with the data with information, such as program execute file, stock information etc., and also can be corresponding with the A/V data.More specifically, compare with the main business data, mobile service data can be corresponding with the A/V data with low resolution and lower data speed.For example, if it is corresponding with the MPEG-2 codec to be used for the A/V codec of conventional main business, the MPEG-4 advanced video coding (AVC) or the scalable video (SVC) that then have better picture compression efficiency can be used as the A/V codec that is used for mobile service.In addition, the data of any kind can be used as mobile service data and are sent out.For example, be used to broadcast real-time Transmission transmission of Information protocol expert group (TPEG) data and can be used as the main business data.
And, use the data service of mobile service data can comprise the weather forecast business, the transport information business, stock information service, spectators participate in quizzer, ballot in real time and investigation, the mutual education broadcast program, game service, provide about summary, the personage, the business of the information of the spot for photography that background music and soap opera or series are acute, business about the information of passing match mark and pothunter's data and achievement is provided, with provide about the professional of product information and by the business that makes it possible to handle purchase order, media, the program of time and subject classification.Herein, the present invention is not limited only to above-mentioned business.In the present invention, transmitting system provides back compatible in the main business data, so that received by conventional receiving system.Herein, main business data and mobile service data are multiplexed to same physical channel, and are sent out then.
Transmitting system according to the present invention is carried out additional code to mobile service data, and inserts the data (that is, given data) that receiving system and transmitting system have been known, thereby sends the data of having handled.Therefore, when using according to transmitting system of the present invention, receiving system can receive mobile service data during mobile status, and can stably receive mobile service data, which kind of distortion and the noise that no matter occur in channel.
The general description of transmitting system
Fig. 1 illustrates the block diagram according to the general structure of the digital broadcasting transmission system of the embodiment of the invention.Herein, digital broadcast transmission comprises service duplexer 100 and transmitter 200.Herein, service duplexer 100 is arranged in the studio in each broadcasting station, and transmitter 200 is positioned at the place that is arranged on from this studio preset distance.Transmitter 200 can be positioned at a plurality of diverse locations.And for example, a plurality of transmitters can be shared same frequency.And in this case, a plurality of transmitters receive same signal.Therefore, in receiving system, channel equalizer can compensate the distorted signals that is caused by reflected wave, so that recover primary signal.In another example, a plurality of transmitters can have different frequency for same channel.
Several different methods can be used to be positioned at each transmitter of remote location and the data communication of service duplexer.For example, such as the interface standard of the synchronous serial interface that is used for MPEG-2 data (SMPTE-310M) transmission.In the SMPTE-310M interface standard, constant data rate is defined as the output data rate of service duplexer.For example, under the situation of 8VSB pattern, output data rate is 19.39Mbps, and under the situation of 16VSB pattern, output data rate is 38.78Mbps.In addition, in the 8VSB of routine pattern transmitting system, transport stream (TS) bag with about 19.39Mbps data rate can be sent out by the single one physical channel.And, in according to the transmitting system of the present invention that provides with conventional transmitting system back compatible, mobile service data is carried out additional code.After this, the mobile service data of additional code is become the TS packet form with the main business data multiplex, then, it is sent out.In this, the data rate of multiplexing TS bag approximately is 19.39Mbps.
In this, specific program information (PSI)/program and system information protocol (PSIP) table data that service duplexer 100 receives the mobile service data of at least a type and is used for each mobile service, and received data encapsulation is arrived each transport stream (TS) wrap.And service duplexer 100 receives the main business data of at least a type and is used for the PSI/PSIP table data of each main business, so that received data encapsulation is wrapped to TS.Subsequently, according to predetermined multiplexing rule, multiplexing TS wraps, and multiplexing bag is outputed to transmitter 200.
Service duplexer
Fig. 2 illustrates the block diagram of the example that service duplexer is shown.Service duplexer comprises with the controller 110 of the overall operations of control service duplexer, the PSI/PSIP maker 120 that is used for main business, the PSI/PSIP maker 130 that is used for mobile service, empty bag maker 140, mobile service multiplexer 150 and Transmission Multiplexer 160.Transmission Multiplexer 160 can comprise main business multiplexer 161 and transport stream packets multiplexer 162.With reference to figure 2, the main business data of the compressed encoding of at least a type and the PSI/PSIP table data that generate from PSI/PSIP maker 120 that are used for main business are inputed to the main business multiplexer 161 of Transmission Multiplexer 160.Main business multiplexer 161 is packaged into MPEG-2 TS packet form with the main business data of input and each in the PSI/PSIP table data.Then, MPEG-2 TS bag is re-used and is output to TS bag multiplexer 162.For for simplicity, will be called as the main business packet herein, from the packet of main business multiplexer 161 outputs.
After this, the compressed encoding mobile service data with at least a type is input to mobile service multiplexer 150 with the PSI/PSIP table data that generate from PSI/PSIP maker 130 that are used for mobile service.Mobile service multiplexer 150 is packaged into MPEG-2 TS packet form with the mobile service data of input and each in the PSI/PSIP data.Then, MPEG-2 TS bag is re-used and is output to TS bag multiplexer 162.For for simplicity, will be called as the mobile service data bag herein, from the packet of mobile service multiplexer 150 outputs.In this, transmitter 200 needs identification information, to identify and to handle this main business packet and mobile service data bag.Herein, identification information can use according to the agreement predetermined value between transmitting system and receiving system, or can perhaps can be modified in the value in the precalculated position in the corresponding data bag by independently data acquisition system configuration.As example of the present invention, can distribute different Packet Identifier (PID), to identify each in main business packet and the mobile service data bag.
In another example, by being modified in the synchrodata byte in the mobile service data, can come the identification service packet by the synchrodata byte value that uses the corresponding service packet.For example, the sync byte of main business packet is directly exported by ISO/IEC13818-1 standard (that is 0x47) definite value, without any revising ground.This value is revised and exported to the sync byte of mobile service data bag, thus sign main business packet and mobile service data bag.On the contrary, the sync byte of main business packet is modified and is output, but the sync byte of mobile service data bag directly do not exported with revising, thereby make it possible to identify main business packet and mobile service data bag.
Several different methods can be used to revise in the method for sync byte.For example, each of sync byte can be opposite, or only the part of sync byte can be opposite.As mentioned above, the identification information of any kind can be used to identify main business packet and mobile service data bag.Therefore, scope of the present invention is not limited only to example illustrated in description of the invention.
Simultaneously, according to the present invention, the Transmission Multiplexer of using in conventional digit broadcasting system can be used as Transmission Multiplexer 160.More specifically, for multiplexing mobile service data and main business data, and send multiplexing data, the data rate of main business is subject to the data rate of (19.39-K) Mbps.Then, will be assigned as the data rate of mobile service with the corresponding K Mbps of remaining data speed.Therefore, already used Transmission Multiplexer can not have the former state use of any modification ground.Herein, transport service is multiplexing from the main business packet of main business multiplexer 161 outputs and the mobile service data bag of exporting from mobile service multiplexer 150 with device 160.After this, Transmission Multiplexer 160 is sent to transmitter 200 with multiplexing packet.
Yet in some cases, the output data rate of mobile service multiplexer 150 can be not equal to K Mbps.In this case, the multiplexing and output of mobile service multiplexer 150 makes output data rate can reach K Mbps from the empty packet that sky bag maker 140 generates.More specifically, for output data rate and the constant data rate that makes mobile service multiplexer 150 is complementary, empty bag maker 140 generates empty packet, then, exports empty packet to mobile service multiplexer 150.For example, when service duplexer 100 is distributed to mobile service data with the K Mbps of 19.39Mbps, therefore and when residue (19.39-K) Mbps was assigned to the main business data, in fact being become by the data rate of the multiplexing mobile service data of service duplexer 100 was lower than KMbps.This is because under the situation of mobile service data, the preprocessor of transmitting system is carried out additional code, thereby has increased data volume.At last, the data rate of the mobile service data that can send from service duplexer 100 becomes and is lower than K Mbps.
For example, because the preprocessor of transmitter is carried out encoding process with at least 1/2 encoding rate to mobile service, so be increased to above the twice of initial input to the data volume of preprocessor from the data volume of preprocessor output.Therefore, become by the data rate sum of the data rate of the multiplexing main business data of service duplexer 100 and mobile service data and be equal to or less than 19.39Mbps.Therefore, in order (for example to make from the data rate of the data of the last output of service duplexer 100 and constant data rate, 19.39Mbps) be complementary, generate and lack the amount of the corresponding empty packet of amount of data rate from sky bag maker 140, and export mobile service multiplexer 150 to.
Therefore, mobile service multiplexer 150 becomes MPEG-2 TS packet form with the mobile service data of input with PSI/PSIP table data encapsulation.Then, with above-mentioned TS bag and empty packet multiplexing, and export TS bag multiplexer 162 then to.After this, TS bag multiplexer 162 will be from the main business packet of main business multiplexer 161 outputs and mobile service data cladding usefulness from 150 outputs of mobile service multiplexer, and packet that will be multiplexing is sent to transmitter 200 with the data rate of 19.39Mbps.
According to one embodiment of present invention, mobile service multiplexer 150 receives empty packet.Yet this only is exemplary, and does not limit scope of the present invention.In other words, according to another embodiment of the present invention, TS bag multiplexer 162 can receive empty packet, so that the data rate of last output and constant data rate are complementary.Herein, the outgoing route of empty packet and multiplexing rule are by controller 110 controls.The multiplexing process that controller 110 controls are carried out by the main business multiplexer 161 and the TS bag multiplexer 162 of mobile service multiplexer 150, Transmission Multiplexer 160, and also the empty packet of the empty bag of control maker 140 generates.In this, transmitter 200 abandons the empty packet that sends from service duplexer 200, but not sends empty packet.
And, in order to allow transmitter 200 to abandon the empty packet that sends from service duplexer 100 but not send them, need be used to identify the identification information of empty packet.Herein, identification information can use according to the agreement predetermined value between transmitting system and receiving system.For example, can be modified in the value of the sync byte in the header of sky packet, so that as identification information.Alternatively, the transport_error_indicator sign also can be used as identification information.
In description of the invention, use the example of transport_error_indicator sign with providing, to describe embodiments of the invention as identification information.In this case, the transport_error_indicator of empty packet sign is set to 1, and the transport_error_indicator of remaining data bag sign is reset to " 0 ", so that identify empty packet.More specifically, when sky bag maker 140 generates empty packet,, be sent out then, then should can be identified and therefore be dropped by the sky packet if be set to 1 from the transport_error_indicator sign of empty packet header field.In the present invention, can use the identification information of any kind that is used to identify empty packet.Therefore, the scope of the present invention example that is not limited only in description of the invention, illustrate.
According to another embodiment of the present invention, send parameter and can be included in the empty packet of at least a portion, perhaps be used for mobile service PSI/PSIP table at least one table or operation and maintenance (OM) bag (or OMP).In this case, transmitter 200 extracts and sends parameter and the transmission parameter of being extracted is outputed to corresponding piece, and if desired, also the parameter of being extracted is sent to receiving system.More specifically, the package definition that will be called OMP is used to operate and manage the purpose of transmitting system.For example, dispose OMP, and corresponding PID is endowed the value of Ox1FFA according to MPEG-2 TS packet format.OMP is disposed by the header of 4 bytes and the pay(useful) load of 184 bytes.Herein, in 184 bytes, first byte is corresponding with the OM_type field, and this OM_type field is represented the type of OM bag.
In the present invention, sending parameter can be sent out with the form of OMP.And, in this case, in the value of the reserved field in the OM_type field, use the value that presets, thereby sending parameter, indication is sent to transmitter 200 with the OMP form.More specifically, transmitter 200 can be by finding (or sign) OMP with reference to PID.And, by resolving the OM_type field in OMP, whether comprise the transmission parameter after the OM_type field that transmitter 200 can be verified at corresponding bag.It is corresponding from the needed supplementary data of the mobile service data of transmitting system and receiving system with processing that this sends parameter.
Send parameter herein, and can comprise data burst message, the area information in data set, RS frame information, superframe information, burst information, turbo sign indicating number information and RS sign indicating number information.Burst information can comprise burst size information, Burst Period information and to the temporal information of next burst.Burst Period represents to send the cycle that the burst of identical mobile service is repeated.Data set comprises a plurality of mobile service data groups, and a plurality of such data set assembled (or grouping), to form burst.The burst part is represented the beginning of the beginning of current burst to next burst.Herein, the burst part is classified as the part (being also referred to as the burst part) that comprises data set, and the part (being also referred to as non-burst part) that does not comprise data set.The burst part disposes by a plurality of, and wherein, a field comprises a data set.
Send signal that parameter also can comprise the coded identification territory about how so that send the information of mobile service data, and about how the multiplexed information of multiplexing main business data and mobile service data or various types of mobile service data.It only is exemplary being included in the information that sends in the parameter, to promote the understanding of the present invention.And interpolation and deletion are included in the information that sends in the parameter and can are easily revised or be changed by those skilled in the art.Therefore, the example of being advised in the description that the invention is not restricted to illustrate herein.In addition, send parameter and can be provided to transmitter 200 from service duplexer 100.Alternatively, send parameter and also can be provided with, or receive from external source by the internal controller (not shown) in transmitter 200.
Transmitter
Fig. 3 illustrates the block diagram that illustrates according to the example of the transmitter 200 of the embodiment of the invention.Herein, transmitter 200 comprises demodulation multiplexer 210, packet jitter moderator (packet jitter mitigator) 220, preprocessor 230, bag multiplexer 240, preprocessor 250, synchronous (sync) multiplexer 260 and transmitting element 270.Herein, when when service duplexer 100 receives packet, it is corresponding with main business packet, mobile service data bag or sky packet that demodulation multiplexer 210 should identify received packet.For example, the PID that demodulation multiplexer 210 uses in received packet is so that sign main business packet and mobile service data bag.Then, demodulation multiplexer 210 uses the transport_error_indicator field to identify empty packet.Main business packet by demodulation multiplexer 210 signs is output to packet jitter moderator 220, and the mobile service data bag is output to preprocessor 230, and empty packet is dropped.Be included in the sky packet if send parameter, send parameter so and at first be extracted and be output to corresponding piece.After this, empty packet is dropped.
230 pairs of preprocessors are included in mobile service data in the business data packet and carry out additional code and handle, this business data packet from demodulation multiplexer 210 by demultiplexing and be output.Preprocessor 230 is also carried out the processing of set of configuration data, so that can data set be placed on ad-hoc location according to the purposes of data, they will be sent out on transmit frame.This makes mobile service data can make response rapidly, and resists noise and channel variation forcefully.When carrying out the additional code processing, preprocessor 230 also can be with reference to sending parameter.And preprocessor 230 divides into groups a plurality of mobile service data bags, with set of configuration data.After this, given data, mobile service data, RS parity data and MPEG header are assigned to the presumptive area in data set.
Preprocessor in transmitter
Fig. 4 illustrates the block diagram that illustrates according to the example of preprocessor 230 of the present invention.Preprocessor 230 comprises data randomizer (data randomizer) 301, RS frame encoder 302, piece processor 303, group formatter 304, data deinterlacing device 305, packet format device 306.Data randomizer 301 in above-mentioned preprocessor 230 produces the mobile service data bag at random, and this mobile service data bag comprises the mobile service data by demodulation multiplexer 210 inputs.Then, the data randomizer 301 mobile service data bag that will generate at random exports RS frame encoder 302 to.In this, because 301 pairs of mobile service data of data randomizer are carried out randomization, so can omit the randomization of carrying out by 251 pairs of mobile service data of data randomizer of preprocessor 250.Data randomizer 301 also can be discarded in the sync byte in the mobile service data bag, and carries out randomization.This is can be by the option of system designer's selection.In the example that provides in the present invention, carried out randomization under the situation of the sync byte in not abandoning the mobile service data bag.
More specifically, every row of superframe is carried out according to pre-defined rule when RS frame encoder 302 and to be arranged when handling, having changed is expert at arrange handle before and the position of the row in the superframe afterwards.If according to superframe is that unit has carried out capable arrangement processing, even and the part that a plurality of mistakes wherein occur becomes very long, even and the error number in being included in the RS frame of wanting decoded surpassed the degree that can be repaired, these mistakes also become dispersion in whole superframe.Therefore compare with single RS frame, even strengthened decoding capability more.
In this, as example of the present invention, the RS coding is used for error correction coding handles, and the Cyclic Redundancy Check coding is used for the error detection processing.When carrying out the RS coding, generated the parity data that is used for error correction.And, when carrying out the CRC coding, generated the CRC data that are used for error detection.The RS coding is in forward error correction (FEC) method.FEC is corresponding with the technology that is used to compensate sending the mistake that occurs during handling.The CRC data that generate by CRC coding can be used in reference to be shown in send by channel during mobile service data whether damaged by mistake.In the present invention, can use the multiple error detection coding method except the CRC coding method, perhaps can use error correction/encoding method to strengthen the whole error correcting capability of receiving system.Herein, the predetermined transmission parameter that sends parameter and/or provide from service duplexer 100 is provided RS frame encoder 302, comprises the configuration of RS frame, RS coding, CRC coding, superframe configuration and is the operation that the row of unit is arranged with the superframe so that carry out.
Preprocessor in RS frame encoder
Fig. 5 (a) illustrates according to the error correction coding and the error detection coding of the embodiment of the invention to Fig. 5 (e) and handles.More specifically, RS frame encoder 302 at first is divided into the mobile service data byte of being imported the unit of predetermined length.This predetermined length is determined by system designer.And in this example of the present invention, predetermined length equals 187 bytes, and therefore, for for simplicity this 187 byte unit being called bag.For example, shown in Fig. 5 (a), when the mobile service data of importing and be that the MPEG transmission package of unit configuration flows when corresponding with 188 bytes, shown in Fig. 5 (b), remove first sync byte, so that be that unit disposes with 187 bytes.Herein, because each mobile service data bag has identical value, so remove sync byte.
In processing early, during the randomization of data randomizer 301, can carry out the processing that removes sync byte herein.In this case, can omit the processing that removes sync byte by RS frame encoder 302.In addition, when when receiving system is added sync byte, this processing can be separated randomizer but not the RS frame decoder is carried out by data.Therefore, if removable fixed byte (for example, sync byte) is not present in the mobile service data bag that is inputing to RS frame encoder 302, if perhaps do not dispose the mobile service data of importing with packet format, then to be divided into 187 bytes be unit to the mobile service data that will import, is the bag of unit with 187 bytes thereby configuration is used for each.
Subsequently, shown in Fig. 5 (c), the bag number N that is disposed by 187 bytes is grouped, with configuration RS frame.In this, the RS frame of (OK) * 187 (row) byte-sized that the RS frame is configured to have N, order is imported the bag of 187 bytes on the direction of wherein being expert at.In order to simplify description of the invention, also be called a RS frame by RS frame as above-mentioned configuration.More specifically, only pure mobile service data is included in the RS frame, a RS frame is with identical by the structure of 187N byte row configuration.After this, will be divided into equal size in the mobile service data in the RS frame.Then, when sending the mobile data of being divided with the order identical with the input sequence that is used to dispose the RS frame, and one or more when wrong when during transmission/reception is handled, having occurred at the specified point place, these mistakes are also trooped (or gathering) in the RS frame.In this case, when carrying out error correction decoding, receiving system uses RS to wipe coding/decoding method, thereby strengthens error correcting capability.In this, shown in Fig. 5 (c), the N number purpose row in N number purpose frame comprise 187 bytes.
In this case, to each row carry out (Nc, Kc)-the RS encoding process so that generate Nc-Kc (=P) number purpose parity bytes.Then, after the last byte of respective column, add the parity bytes of newly-generated P number, thereby created the row of (187+P) byte.Herein, shown in Fig. 5 (c), Kc equals 187, and (that is, Kc=187), and Nc equals 187+P (that is, Nc=187+P).For example, when P equals 48, carry out (235,187)-RS encoding process, so that create the row of 235 bytes.Shown in Fig. 5 (c), when the row of all N numbers are carried out such RS encoding process, shown in Fig. 5 (d), can create RS frame with N (OK) * (187+P) (row) byte-sized.In order to simplify description of the invention, the RS frame that has wherein inserted the RS parity is called the 2nd RS frame.More specifically, can dispose the 2nd RS frame that has by (187+P) row structure of N byte configuration.
Shown in Fig. 5 (c) or Fig. 5 (d), every row of RS frame is disposed by the N byte.Yet according to the channel conditions between transmitting system and receiving system, mistake may be included in the RS frame.When mistake occurred as mentioned above, CRC data (or CRC code or CRC check and) can be used for each row unit, so that whether checking exists mistake in each row unit.RS frame encoder 302 can be carried out coding to the mobile service data of RS coding, so that create (or generation) CRC data.Whether the CRC data that generate by CRC coding can be used for indication and be damaged when mobile service data sends by channel.
Except the CRC coding method, the present invention also uses different error detection coding methods.Alternatively, the present invention can use error correction/encoding method to strengthen the whole error correcting capability of receiving system.Fig. 5 (e) illustrates with 2 bytes (that is, 16) CRC check with as the example of CRC data.Herein, generated the N number that is used for every row byte 2 byte CRC check and, thereby the ending of the byte of N number added 2 byte CRC check and.Therefore, every row is extended to the byte of (N+2) number.Below every row of disposing of equation 1 and the byte that is used to generate by the N number 2 byte CRC check and exemplary equation corresponding.
(equation 1) g (x)=x
16+ x
12+ x
5+ 1
In every row, add 2 byte verifications and processing only be exemplary.Therefore, the present invention is not limited only to the example of being advised in the illustrated herein description.In order to simplify the understanding of the present invention, hereinafter with wherein added RS parity and CRC check and the RS frame be called the 3rd RS frame.More specifically, the 3rd RS frame is corresponding by the row of (187+P) number of (N+2) number byte configuration with each.As mentioned above, when having finished RS coding and CRC encoding process, (N*187) the RS frame of byte is extended to the RS frame of (N+2) * (187+P) byte.In addition, shown in Fig. 5 (e), the RS frame that is expanded is input to piece processor 303.
As mentioned above, will be input to piece processor 303 by the mobile service data of RS frame encoder 302 codings.Then, (wherein, G is less than the mobile service data coding of encoding rate to being imported of H (be G＜H)), and outputs to group formatter 304 then with G/H for piece processor 303.More specifically, piece processor 303 will be that the mobile service data of unit input is divided into the position with the byte be a unit.Then, the position of G number is encoded into the position of H number.After this, it is unit that the position of having encoded is changed back with the byte, and output then.For example, if 1 input data are encoded into 2 and output, G equals 1 so, and H equals 2 (that is, G=1 and H=2).Alternatively, if 1 input data is encoded into 4 and output, G equals 1 so, and H equals (G=1 and H=4).Hereinafter, for for simplicity, the former encoding rate is called 1/2 encoding rate (1/2 rate code), and the latter's encoding rate is called 1/4 encoding rate (1/4 rate code).
Herein, when using 1/4 encoding rate, code efficiency is greater than the situation when using 1/2 encoding rate, and therefore can provide better and the error correcting capability of enhancing.Owing to such reason, near the end of supposing the system that will be arranged in group formatter 304 is dispensed to the zone that receptivity may descend with 1/4 encoding rate coded data, and will be dispensed to zone with 1/2 encoding rate coded data with fabulous receptivity, can reduce performance difference.In this, piece processor 303 also can receive and comprise the signaling information that sends parameter.Herein, also can utilize as 1/2 rate code or 1/4 rate code in handling the step of mobile service data and come processing signaling information.After this, it is identical with mobile service data that this signaling information also is considered to, and correspondingly handled.
Simultaneously, the group formatter will be from the respective regions in the mobile service data insertion data set of piece processor 303 outputs, and this data set is according to the configuration of predefine rule.And, to handle with respect to data deinterlacing, each placeholder or given data (or given data placeholder) also are inserted in the respective regions of data set.In this, data set can be divided at least one level zone.Herein, the type that is inserted into each regional mobile service data can change according to the characteristic in each level zone.In addition, for example, can divide each zone based on the receptivity in data set.In addition, a data set can be configured to comprise the field synchronization data acquisition system.
In the example that the present invention provides, before data deinterlacing, in data configuration, data set is divided into A, B and C zone.In this, send parameter by reference, the mobile service data that group formatter 304 will be imported after RS coding and block encoding is dispensed to each in the respective regions.Fig. 6 illustrates the aligning after data interlacing and sign, and Fig. 7 illustrates the aligning before data interlacing and sign.More specifically, the data structure identical with data structure shown in Figure 6 is sent to receiving system.And the data set that will be configured to have with data structure same structure shown in Figure 6 inputs to data deinterlacing device 305.
As mentioned above, Fig. 6 illustrates the data structure that was divided into 3 zones before data interlacing, such as regional A, area B and zone C.And, in the present invention, also among the regional A to C each further is divided into a plurality of zones.With reference to figure 6, regional A is divided into 5 zones (A1 to A5), and area B is divided into 2 zones (B1 and B2), and zone C is divided into 3 zones (C1 to C3).Herein, regional A to C is identified as the zone that has similar receptivity in data set.The type of the mobile service data that herein, is transfused to also can become according to each regional characteristic.
In example of the present invention, data structure is divided into regional A to C based on the interference rank of main business data.Data set is divided into a plurality of zones that are used for different purposes herein.More specifically, do not have the zone of disturbing or disturbing the low-down main business data of rank and have other zone of higher interference level and compare the receptivity that can be considered to have higher opposing (or stronger).In addition, when using system inserts in data set and sends given data, and when periodically inserting continuous long given data in the mobile service data, given data with predetermined length periodically can not inserted not in the zone (for example, regional A) from the interference of main business data.Yet,, be difficult to insert given data periodically and also be difficult to continuous long given data is inserted the zone (for example, area B and zone C) that has from the interference of main business data owing to interference from the main business data.
To describe in detail the example of data allocations with reference to figure 6 hereinafter to regional A (A1 to A5), area B (B1 and B2) and zone C (C1 to C3).The number in data set size, the branch level is divided in data set zone and the size in each zone and the number that can be inserted into the mobile service data byte in regional that each branchs level of Fig. 6 divides only are the examples that provides in order to promote to understand the present invention.Herein, group formatter 304 is created data set, and this data set comprises the position of the field that will insert sync byte, so that create hereinafter with the data set of describing in detail.
More specifically, regional A is the zone in the data set that can periodically insert long given data sequence, and comprising the zone of not mixing the main business data (for example, A1 to A5).And, regional A comprise field synchronization zone and to insert between the zone of the first given data sequence the zone (for example, A1).The field synchronization zone has the length of the intrasystem section of the ATSC of being present in (that is 832 symbols).
For example,, the mobile service data of 2428 bytes can be inserted regional A1,2580 bytes can be inserted regional A2,2772 bytes can be inserted regional A3,2472 bytes can be inserted regional A4, and 2772 bytes can be inserted regional A5 with reference to figure 6.Herein, grid initialization data or given data, MPEG header and RS parity are not included in the mobile service data.As mentioned above, when regional A comprised the given data sequence at two ends, receiving system was used the channel information that can obtain given data or field synchronization data, so that carry out equalization, thereby provided the equalization performance of reinforcement.
And, area B comprises that the zone (in chronological order before regional A1) that is located in 8 sections that the field synchronization zone in the data set begins to locate (for example, area B 1) and the zone (for example, area B 2) that is positioned at last given data sequence 8 sections afterwards of inserting data set.For example, the mobile service data of 930 bytes can be inserted area B 1, and 1350 bytes can be inserted area B 2.Similarly, grid initialization data or given data, MPEG header and RS parity are not included in the mobile service data.Under the situation of area B, receiving system can be carried out equilibrium by using the channel information that obtains from the field synchronization zone.Alternatively, receiving system also can be carried out equilibrium from the channel information that last given data sequence obtains by using, thereby the system that makes can make response to channel variation.
Zone C comprise be positioned at comprise and the 9th section of retaining zone on the scene before 30 sections zone (in chronological order before regional A) (for example, zone C 1), be positioned at comprise and the zone (in chronological order after regional A) of 12 sections after the 9th section of the last given data sequence of data set (for example, zone C 2) and the zone (for example, zone C 3) that is positioned at 32 sections after the zone C 2.For example, the mobile service data of 1272 bytes can be inserted zone C 1,1560 bytes can be inserted zone C 2, and 1312 bytes can be inserted zone C 3.Similarly, grid initialization data or given data, MPEG header and RS parity are not included in the mobile service data.Herein, go up in chronological order early than regional A (or before it) position of zone C (for example, zone C 1).
Because zone C (for example, zone C 1) is positioned at the position of further leaving the field synchronization zone, the field synchronization zone is corresponding with nearest given data zone, and when carrying out channel equalization, receiving system can be used the channel information that obtains from the field synchronization data.Alternatively, receiving system also can be used the up-to-date channel information of previous set of data.In addition, the zone C before being arranged in regional A (for example, zone C 2 and zone C 3), receiving system can be used from the channel information of last given data sequence acquisition and carry out equilibrium.Yet, when channel carries out quick and frequent variation, may not ideally carry out equilibrium.Therefore, the equalization performance of zone C is compared with area B and may be descended.
When the tentation data group had been assigned with regional that a plurality of minutes levels divide, as mentioned above, piece processor 303 mobile service data of can encoding was inserted each zone with the different coding rate with mobile service data based on the characteristic in each level zone.For example, piece processor 303 mobile service data of can encoding, the encoding rate with 1/2 inserts this mobile service data the regional A1 to A5 of regional A.Then, group formatter 304 can insert regional A1 to A5 with the mobile service data of 1/2 rate code.
In addition, group formatter 304 also inserts data set with the supplementary data except mobile service data, such as the signaling information of notifying whole transmission information.And, as shown in Figure 6, except from the mobile service data of coding of piece processor 303 outputs, group formatter 304 also inserts MPEG header placeholder, nonsystematic RS parity placeholder, main business data placeholder, and they relate to the data deinterlacing in handling in the back.Herein, as shown in Figure 6, because mobile service data byte and main business data byte are based on input alternately mixing each other in area B and C of data deinterlacing device, so inserted main business data placeholder.For example, based on the data of output after data deinterlacing, can be at the placeholder that branch is used in the MPEG header that begins most of each bag.
In addition, group formatter 304 inserts the given data that generates according to preordering method, perhaps inserts the given data placeholder, is used for handling in the back and inserts given data.In addition, the placeholder that is used for initialization grid coding module 256 also is inserted into respective regions.For example, the initialization data placeholder can be inserted the beginning of given data sequence.Herein, the size that can insert the mobile service data of data set can change according to the size of grid initialization placeholder or given data (or given data placeholder), MPEG header placeholder and RS parity placeholder.
The output of group formatter 304 is input to data deinterlacing device 305.And data deinterlacing device 305 reverse process by the data in data set and placeholder are carried out data interleaver then, outputs to packet format device 306 with them with data deinterlacing.More specifically, data in the data set of configuration as shown in Figure 6 and placeholder are during by 305 deinterleavings of data deinterlacing device, and the data set that outputs to packet format device 306 is configured to have structure shown in Figure 7.
In this, can during the burst part, send the main business data.Bag multiplexer 240 is with reference to sending parameters, such as the information about burst sizes or Burst Period, so that know the number that is included in the data set in the single burst and the cycle of data set.Herein, mobile service data and main business data can coexist as in the burst part, and only main business data may reside in the non-burst part.Therefore, the key data service part of transmission main business data may reside in burst and the non-burst part.In this, key data service part in burst part and the number that is included in non-key data business packet in happening suddenly partly can differ from one another or be identical.
When sending mobile service data in burst structure, the receiving system that only receives mobile service data is energized during the burst part only, thereby receives corresponding data.Alternatively, in only sending the main business section data, deenergization makes not receive the main business data in this part.Therefore, can reduce the power consumption of receiving system.
The specific embodiment of RS frame structure and cladding usefulness
The specific embodiment of preprocessor 230 and bag multiplexer 240 will be described hereinafter, now.According to embodiments of the invention, will be included in by being arranged to 538 with the corresponding N value of line length in the RS frame of RS frame encoder 302 configuration.Therefore, RS frame encoder 302 receives 538 transport stream (TS) bag, so that the RS frame that configuration has the 538*187 byte-sized.After this, as mentioned above, utilize (235,187)-RS encoding process to handle a RS frame, so that the 2nd RS frame that configuration has the 538*235 byte-sized.At last, utilize to generate 16 verification and handle the 2nd RS frame, so that the 3rd RS frame that configuration has the 540*235 size.
Simultaneously, as shown in Figure 6, in a plurality of zones in data set, the byte number sum of regional A1 to A5 of regional A that insert the mobile service data of 1/2 rate code equals 13024 bytes (=2428+2580+2772+2472+2772 byte).Herein, the byte number before carrying out the processing of 1/2 rate code equals 6512 (=13024/2).On the other hand, in a plurality of zones in array, insert the area B 1 of area B of 1/4 rate code mobile service data and the byte number sum of B2 and equal 2280 bytes (=930+1350 byte).Herein, the byte number before carrying out the processing of 1/4 rate code equals 570 (=2280/4).
In other words, when the mobile service data with 7082 bytes is input in the piece processor 303,6512 byte expansion are become 13024 bytes, and 570 byte expansion are become 2280 bytes by 1/4 rate code by 1/2 rate code.After this, piece processor 303 will be extended to the mobile service data of 13024 bytes and insert among the regional A1 to A5 of regional A, and the mobile service data that also will be extended to 2280 bytes is inserted in the area B 1 and B2 of area B.The mobile service data that is input to 7082 bytes of piece processor 303 can be divided into the output and the signaling information of RS frame encoder 302 herein.In the present invention, in the mobile service data of 7082 bytes, 7050 bytes are corresponding with the output of RS frame encoder 302, and it is corresponding with the signaling information data to remain 32 bytes.Then, the corresponding data byte is carried out 1/2 rate code or 1/4 rate code.
Simultaneously, be used to dispose by the 540*235 byte, in other words, dispose by 126900 bytes from the RS frame of the RS of RS frame encoder 302 coding and CRC encoding process.This 126900 byte along time shaft divided by 7050 byte unit, thereby draw 18 7050 byte unit.After this, the signaling information that with 32 bytes is unit being added to is the mobile service data of unit from RS frame encoder 302 output with 7050 bytes.Subsequently, 302 pairs of corresponding data bytes of RS frame encoder are carried out 1/2 rate code or 1/4 rate code, then they are outputed to group formatter 304.Therefore, group formatter 304 inserts the data of 1/2 rate code among the regional A, and the data of 1/4 rate code are inserted in the area B.
To describe in detail now and determine the processing of configuration from the needed N value of RS frame of RS frame encoder 302.More specifically, carry out last RS frame that RS coding and CRC encode from RS frame encoder 302 (that is, the 3rd RS frame) size should be assigned to the group of X number, and wherein, X is an integer with (N+2) * 235 bytes are corresponding.In single data set, 7050 data bytes before being encoded have been distributed herein.Therefore, (=30*235) accurate multiple then can be dispensed to data set effectively with the dateout of RS frame decoder 302 if (N+2) * 235 is arranged to 7050.According to embodiments of the invention, determined that the N value makes (N+2) become 30 multiple.For example, in the present invention, N equals 538, and (N+2) (=540) equal 18 divided by 30.This indication is utilizing 1/2 rate code or 1/4 rate code to handle a mobile service data in the RS frame.Then, the mobile service data of having encoded is dispensed to 18 data sets.
Fig. 8 illustrates the processing of dividing the RS frame according to the present invention.More specifically, the RS frame that will have (N+2) * 235 sizes is divided into the 30*235 block of bytes.Then, the piece of being divided is mapped to single group.In other words, utilize one in processing of 1/2 rate code and the processing of 1/4 rate code to handle blocks of data, and then, they are inserted data set with 30*235 byte-sized.After this, have the corresponding data that in each level zone of dividing by group formatter 304, inserts and the data set of placeholder and pass data deinterlacing device 305 and packet format device 306, so that be imported into bag multiplexer 240.
Fig. 9 illustrates the exemplary operation that is used to send the bag multiplexer of data set according to of the present invention.More specifically, the bag multiplexer 240 multiplexing field of data set and the fields that only comprise the main business data of comprising, in data set, mobile service data and main business data are mixed with each other.After this, bag multiplexer 240 outputs to data randomizer 251 with multiplexing field.In this, as shown in Figure 6,, should send 18 data sets in order to send RS frame with 540*235 byte-sized.Herein, each data set comprises the field synchronization data.Therefore, during 18 field parts, sent 18 data sets, and during to send the part of 18 data sets corresponding with the burst part.
In in the burst part each, will comprise the data set and the main business data multiplex of field synchronization data, then with they output.For example, in an embodiment of the present invention, in each in the burst part, the data set that will have 118 section sizes is multiplexing with the main business data acquisition system with 194 section sizes.With reference to figure 9, during the burst part (that is, during 18 field parts), send the field that comprises 18 data sets.Then, during non-burst part subsequently (that is, during 12 field parts), send the field that only comprises the main business data.Subsequently, in burst part subsequently, send 18 fields that comprise 18 data sets.And,, send 12 fields that only comprise the main business data in non-burst part subsequently.
In addition, in the present invention, in comprising the first burst part of the one 18 data set and in comprising that second of next 18 data sets happen suddenly partly, can provide the data service of same type.Alternatively, in each burst part, can provide the data of different types business.For example, when supposition provides the different pieces of information type of service to the first burst part and second burst partly each, and receiving system is when wishing only to receive one type data service, receiving system is only during comprising the corresponding burst part of expected data type of service, the ability energized is so that receive corresponding 18 data fields.Then, during remaining 42 field parts, the receiving system deenergization is so that prevent to receive other data service types.Therefore, can reduce the power consumption of receiving system.In addition, the advantage according to receiving system of the present invention is: can dispose a RS frame from the eighteen data group that receives during single burst part.
According to the present invention, the number that is included in the data set in the burst part can change based on the size of RS frame, and the size of RS frame can change according to value N.More specifically, by adjusted value N, can be adjusted at the number of the data set in the burst part.Herein, in example of the present invention, (235,187)-RS encoding process adjusted value N during stationary state.In addition, the size that can insert the mobile service data in the data set can change based on the size of inserting grid initialization data in the corresponding data group or given data, MPEG header and RS parity.
Simultaneously, because data set is included in the mobile service data in the middle of the data byte of main business data during the multiplexing process, so that the time location of main business packet (or place) mobile becomes is relative.And, the System Target Decoder (that is, mpeg decoder) that is used to handle the main business data of the receiving system main business data that only receive and decode, and the mobile service data bag is identified as the sky packet.Therefore, when the System Target Decoder of receiving system receives main business packet with burst multiplexing, packet jitter takes place.
The packet jitter that generates from bag multiplexer 240 in this, is present in the big or small relatively large of System Target Decoder and buffer, so can not cause any serious problem under the video data situation owing to be used for the multi-level buffer of video data.Yet, because it is less relatively to be used for the buffer sizes of voice data, so packet jitter may cause sizable problem.More specifically, because packet jitter, may overflow or underflow at the buffer (buffer that for example, is used for voice data) of the main business data that are used for receiving system.Therefore, packet jitter moderator 220 is readjusted the relative position of main business packet, makes can not overflow or underflow in System Target Decoder.
In the present invention, will be described in detail in the position of reorientating packets of audio data in the main business data to minimize example to the influence of audio buffer operation.Packet jitter buffer 220 is reorientated packets of audio data in the main business data division, make the packets of audio data of main business data can be as much as possible by impartial and aim at equably and locate.Use description to the standard of reorientating now by the packets of audio data in the main business data of packet jitter moderator 220 execution.Herein, suppose packet jitter moderator 220 know and the bag multiplexer 240 the identical multiplexed information of multiplexed information, the bag multiplexer 240 be set at packet jitter moderator 220 more back some.
At first, if packets of audio data is present in the main business data division in the burst part (for example, being arranged on two main business data divisions between the data set), then packets of audio data is arranged on beginning most of main business data division.Alternatively, if two packets of audio data are present in the corresponding data part, then a packets of audio data is arranged on beginning most of main business data division, and another packets of audio data is arranged on the least significant end of main business data division.And, surpass three packets of audio data if exist, then a packets of audio data is arranged on beginning most of main business data division, and another is arranged on the least significant end of main business data division, and the remaining audio business data packet be arranged on equably first and last packets of audio data between.The second, during the main business data division that before and then burst part, is provided with (that is, during non-burst part), packets of audio data is arranged on the least significant end of appropriate section.
The 3rd, during the main business data division in the non-burst part of burst part back, packets of audio data is arranged on the least significant end of main business data division.At last, according to the packet that is provided with at vacant space (that is, specifying the space that is used for packets of audio data) interior input sequence except packets of audio data.Simultaneously, when readjusting the position of main business packet relatively, also can correspondingly revise the program clock reference that is associated (PCR) value.The PCR value is corresponding with the time reference value of the time that is used for synchronous mpeg decoder.Herein, the PCR value is inserted in the specific region of TS bag, and is sent out then.
In example of the present invention, packet jitter moderator 220 is also carried out the operation of revising the PCR value.The output of packet jitter moderator 220 is input in the bag multiplexer 240.As mentioned above, bag multiplexer 240 will be used the burst structure from the main business packet of packet jitter moderator 220 outputs and from the mobile service data cladding of preprocessor 230 outputs according to predetermined multiplexing rule.Then, bag multiplexer 240 outputs to multiplexing packet in the data randomizer 251 of preprocessor 250.
If the data of being imported are corresponding with the main business packet, then data randomizer 251 is carried out the randomization identical with the randomization of conventional randomizer.More specifically, deleted sync byte in the main business packet.Then, by using the pseudorandom byte that generates from data randomizer 251, will remain the randomization of 187 data bytes.After this, randomization data outputs to RS encoder/nonsystematic RS encoder 252.
On the other hand, if the data of being imported are corresponding with the mobile service data bag, then data randomizer 251 can be only with a part of randomization of packet.For example, if supposition preprocessor 230 has been carried out randomization to the mobile service data bag in advance, then delete sync byte the 4 byte MPEG headers of data randomizer 251 in being included in the mobile service data bag, and then, only 3 data bytes of residue of MPEG header are carried out randomization.After this, the randomization data byte outputs to RS encoder/nonsystematic RS encoder 252.More specifically, the remainder of the mobile service data except the MPEG header is not carried out randomization.In other words, the remainder with the mobile service data bag is not having directly to output to RS encoder/nonsystematic RS encoder 252 under the randomized situation.And, data randomizer 251 can to or do not carry out randomization to being included in given data (or given data placeholder) in the mobile service data bag and initialization data placeholder.
252 pairs of RS encoders/nonsystematic RS encoder are carried out the RS encoding process by data randomizer 251 randomized data or to the data of walking around data randomizer 251, so that add the RS parity data of 20 bytes.After this, the data of having handled are outputed to data interleaver 253.Herein, if the data of being imported are corresponding with the main business packet, then RS encoder/nonsystematic RS encoder 252 is carried out the system RS encoding process identical with the system RS encoding process of conventional broadcast system, thereby is added 20 byte RS parity datas at the end of 187 byte datas.Alternatively, if the data of being imported are corresponding with the mobile service data bag, then RS encoder/nonsystematic RS encoder 252 is carried out nonsystematic RS encoding operation.In this, will be inserted in from the 20 byte RS parity datas that nonsystematic RS encoding process obtains the predetermined parity byte location in the mobile service data bag.
In addition, based on the memory state of grid coding module 256, determine the also value of generating mesh initialize memory data.And, because the new initialization data of replacing needs newly to calculate the RS parity and utilizes the processing of new RS parity replacement of calculating from the RS parity of data interleaver 253 outputs.Therefore, non-systemic RS encoder 255 receives the mobile service data bag that comprises the initialization data placeholder from data interleaver 253, the initialization data placeholder will be replaced by actual initialization data, and also receive initialization data from grid coding module 256.
In the mobile service data bag of being imported, the initialization data placeholder is replaced by initialization data, and removes the RS parity data that adds the mobile service data bag to, and utilizes nonsystematic RS coding to handle.After this, will output to odd even by the new RS parity of carrying out the acquisition of nonsystematic RS encoding process and replace device 254.Therefore, odd even is replaced the data of output conduct in the mobile service data bag that device 254 is selected data interleaver 253, and odd even is replaced the output of device 254 selection nonsystematic RS encoders 255 as the RS parity.Then, selected data are outputed to grid coding module 256.
Simultaneously, if imported the main business packet, be transfused to if perhaps imported the mobile service data bag that does not comprise any initialization data placeholder that will be replaced, then parity is replaced data and the RS parity of device 254 selections from data interleaver 253 outputs.Then, parity is replaced device 254 without any directly selected data being outputed to grid coding module 256 with revising.Grid coding module 256 will be that the data transaction one-tenth of unit is unit with the symbol with the byte, and carry out 12 tunnel interleaving treatment, so that received data are carried out grid coding.After this, the data of having handled are outputed to Synchronous multiplexer 260.
The piece processor
Figure 10 illustrates the block diagram that illustrates according to of the present invention processor structure.Herein, the piece processor comprises byte-bit pad 401, symbol encoder 402, symbol interleaver 403 and symbol-byte converter 404.Byte-bit pad 401 will be divided into the position from the mobile service data byte of RS frame encoder 112 inputs, then, they be outputed to symbol encoder 402.Byte-bit pad 401 also can receive and comprise the signaling information that sends parameter.The signaling information data byte also is divided into the position, so that be output to symbol encoder 402.Can handle with the treatment step identical herein and comprise the signaling information that sends parameter with the treatment step of mobile service data.More specifically, can be by passing data randomizer 301 and RS frame encoder 302 is input to piece processor 303 with signaling information.Alternatively, also signaling information directly can be outputed to piece processor 303, and not pass data randomizer 301 and RS frame encoder 302.
Carrying out under the situation that 1/2 rate code handles, symbol encoder 402 receives 1, and is encoded into 2 (that is 1 symbol) with received 1.Then, symbol encoder 402 is exported 2 (or 1 symbol) having handled.On the other hand, carrying out under the situation that 1/4 rate code handles, symbol encoder 402 receives 1, and is encoded into 4 (that is 2 symbols) with received 1.Then, symbol encoder 402 will handle 4 (or 2 symbols) output.
Figure 11 illustrates the detailed diagram of symbol encoder shown in Figure 10 402.Symbol encoder 402 comprises two delay cells 501 and 503 and three adders 502,504 and 505.Herein, 402 pairs of inputs of symbol encoder data bit U coding, and export U to 4 (u0 to u4) in position that has encoded.In this, data bit U is directly exported as upper u0, and is encoded as simultaneously than low level u1u2u3, and is output then.More specifically, input data bit U is directly output as upper u0, and is output to the first and the 3rd adder 502 and 505 simultaneously.First adder 502 adds the carry-out bit of the input data bit U and first delay cell 501, and then, this interpolation position is outputed to second delay cell 503.Then, (for example, 1 clock) data bit is outputted as than low level u1, and is fed back to first delay cell 501 simultaneously to have postponed the scheduled time in second delay cell 503.First delay cell 501 will be from second delay cell, 503 feedback data position delay scheduled times (for example, 1 clock).Then, first delay cell 501 outputs to first adder 502 and second adder 504 with the delayed data position.Second adder 504 adds from the data bit of first and second delay cells 501 and 503 outputs as than low level u2.The 3rd adder 505 adds the output of the input data bit U and second delay cell 503, and the data bit of exporting this interpolation is as than low level u3.
In this, if the data bit U that is imported with corresponding with 1/2 encoding rate coded data, then symbol encoder 402 is used to come configuration symbols from the u1u0 position of 4 carry-out bit u0u1u2u3.Symbol encoder 402 is exported the symbol of new configuration then.Alternatively, if the data bit U that is imported with corresponding with 1/4 encoding rate coded data, then symbol encoder 402 utilizes position u1u0 to dispose and output symbol, and then, utilizes a position u2u3 to dispose and export another symbol.According to another embodiment of the present invention, if the data bit U that is imported with corresponding with 1/4 encoding rate coded data, then symbol encoder 402 also can utilize u1u0 to dispose and output symbol, and and then repeats this processing and the corresponding position of output.According to still another embodiment of the invention, symbol encoder is exported all four carry-out bit U u0u1u2u3.Then, when using 1/2 encoding rate, the symbol interleaver 403 that is positioned at symbol encoder 402 back is only selected the symbol from the position u1u0 configuration of four carry-out bit u0u1u2u3.Alternatively, when using 1/4 encoding rate, symbol interleaver 403 can be selected the symbol by position u1u0 configuration, and then, selects another symbol by position u2u3 configuration.According to another embodiment, when using 1/4 encoding rate, symbol interleaver 403 can repeatedly be selected the symbol by position u1u0 configuration.
The output of symbol encoder 402 is input to symbol interleaver 403.Then, 403 pairs of data from symbol encoder 402 outputs of symbol interleaver interweave for the unit execution block with the symbol.Any interleaver that execution architecture is reset (or again aim at) can be used as the symbol interleaver 403 of piece processor.Yet, in the present invention, even can use when also adaptable variable-length symbol interleaver when this symbol provides a plurality of length, the feasible order that can reset it.
Figure 12 illustrates symbol interleaver according to an embodiment of the invention.Herein, though according to the symbol interleaver of the embodiment of the invention with corresponding when also adaptable variable-length symbol interleaver when this symbol provides a plurality of length, make the order that can reset it.Particularly, Figure 12 illustrates the example of symbol interleaver when K=6 and L=8.Herein, the K indication is from the number of the symbol that is used for symbol interleaving of symbol encoder 402 outputs.And L represents by the number of the symbol interleaver 403 actual symbols that interweave.
In the present invention, symbol interleaver 403 L=2 that should satisfy condition
n(wherein n is an integer) and L 〉=K.If the value between K and L there are differences, then add sky (or the false position) symbol of (L-K) number, thereby create interlace mode.Therefore, K becomes and is input to symbol interleaver so that the block size of the actual symbol that is interleaved.When carrying out interleaving treatment by the interlace mode of creating from symbol interleaver 403, L becomes the unit that interweaves.Illustrate example recited above among Figure 12.
More specifically, Figure 12 (a) illustrates the variable-length interleaving treatment of symbol interleaver shown in Figure 10 to Figure 12 (c).From symbol encoder 402 output so that the number of the symbol that is interleaved equals 6 (that is, K=6).In other words, from 6 symbols of symbol crochet 402 outputs, so that be interleaved.And the actual unit that interweaves (L) equals 8 symbols.Therefore, as shown in figure 12, add 2 symbols to sky (or false position) symbol, thereby create interlace mode.Below shown in equation 2 processing that receives the symbol of K number has in proper order been described, its order is reset, and obtains to satisfy the L value of following condition: L=2
n(wherein n is an integer) and L 〉=K.Interweave so that aim at (or resetting) this symbol order thereby create.
About all positions, 0≤i≤L-1 wherein,
(equation 2) P (i)=S x i x (i+1))/2}/Mod L
Herein, L 〉=K, L=2 ", and n and S are integers.With reference to Figure 12, suppose that S equals 89, and L equals 8, and Figure 12 illustrates the interlace mode created and the example of interleaving treatment.Shown in Figure 12 (b),, the incoming symbol of K number and (L-K) order of the null symbol of number have been reset by using above-mentioned equation 2.Then, shown in Figure 12 (c), removed the null byte position, so that the equation 3 shown in below using is reset this order.After this, so the symbol that the order that will pass through to be reset is interleaved outputs to symbol-byte converter.
(equation 3) is if P (i)＞K-1 removes and reset P (i) position so.
Subsequently, symbol-byte converter 404 becomes byte with the mobile service data symbol transition, has finished resetting of symbol order, and according to the order of being reset it has been exported then, and after this, switched byte has been outputed to group formatter 304.
Figure 13 illustrates the block diagram of the structure of piece processor according to another embodiment of the present invention is shown.Herein, the piece processor comprises interleave unit 610 and block format device 620.Interleave unit 610 can comprise byte-signal converter 611, symbol-byte converter 612, symbol interleaver 613 and byte-signal converter 614.Herein, symbol interleaver 613 also can be called as block interleaver.
To be unit with the byte convert to the symbol from the mobile service data X of RS frame encoder 302 outputs the byte-signal converter 611 of interleave unit 610 is unit.Then, byte-signal converter 611 outputs to symbol-byte converter 612 and symbol interleaver 613 with switched mobile service data symbol.More specifically, byte-signal converter 611 converts per 2 input mobile service data byte (=8) to 1 symbol, and exports switched symbol.This is because the input data of grid coding module 256 comprise the symbolic unit by 2 position configurations.To in the processing of back, be described in detail in the relation between piece processor 303 and the grid coding module 256.In this, byte-signal converter 611 also can receive and comprise the signaling information that sends parameter.In addition, also the signaling information byte can be divided into the symbol is unit, and outputs to symbol-byte converter 612 and symbol interleaver 613 then.
Symbol-byte converter 612 will be from 4 symbol packets of byte-signal converter 611 outputs, so that configuration byte.After this, switched data byte is outputed to block format device 620.Herein, each in symbol-byte converter 612 and the byte-signal converter 611 is respectively to carrying out opposite processing each other.Therefore, the result of these two pieces is cancelled.Therefore, as shown in figure 14, input data X walks around byte-signal converter 611 and symbol-byte converter 612, and is directly inputted to block format device 620.More specifically, the interleave unit 610 of Figure 14 has and interleave unit equivalent configurations shown in Figure 13.Therefore, in Figure 13 and Figure 14, will use identical Reference numeral.
613 pairs of data from 611 outputs of byte-signal converter of symbol interleaver interweave for the unit execution block with the symbol.Subsequently, symbol interleaver 613 outputs to symbol-byte converter 614 with the data that interweaved.Herein, the interleaver that can reset any kind of structural order can be used as symbol interleaver 613 of the present invention.In the example that provides in the present invention, the variable-length interleaver that can be applied to symbol has the length range of broad, and its order will be reset.For example, the symbol interleaver of Figure 12 also can be used to Figure 13 and piece processor shown in Figure 14.
Symbol-byte converter 614 is exported according to the order of being reset and has been finished the symbol that symbol is reset in proper order.After this, be that unit disposes with symbol packets one-tenth so that with the byte, then they are outputed to block format device 620.More specifically, symbol-byte converter 614 will be from 4 symbol packets of symbol interleaver 613 outputs, so that the configuration data byte.As shown in figure 15, block format device 620 is carried out the processing of in piece the output of each symbol- byte converter 612 and 614 being aimed at according to the set standard.Herein, block format device 620 is operated explicitly with network code module 256.
More specifically, block format device 620 is determined the output order from the mobile service data of each symbol- byte converter 612 and 614 outputs, consider the position (or order) of the data except the mobile service data of input simultaneously, wherein mobile service data comprises main business data, given data, RS parity data and MPEG header data.
According to embodiments of the invention, grid coding module 256 is provided with 12 trellis encoder.Figure 16 illustrates the block diagram according to network code module 256 of the present invention.In example shown in Figure 16,12 same mesh encoders are combined in the interleaver, so that distributed noise.Herein, each trellis encoder can be provided with precoder.
Figure 17 illustrates the piece processor 303 with trellis encoder module 256 cascades (concatenate).In transmitting system, as shown in Figure 3, in fact a plurality of be present between the preliminary treatment 230 and grid coding module 256 that comprises piece processor 303.On the contrary, receiving system is thought preprocessor 230 and network code module 256 cascades, thereby correspondingly carries out decoding processing.Yet, data except the mobile service data that is input to grid coding module 256 are corresponding with the piece that adds existence between piece processor 303 and grid coding module 256 to, wherein, mobile service data comprises main business data, given data, RS parity data and MPEG header data.Figure 18 illustrates the example that is arranged on the data processor 650 between piece processor 303 and the network code module 256, has considered above-mentioned situation simultaneously.
When the interleave unit 610 of piece processor 303 is carried out the processing of 1/2 rate code, can shown in Figure 12 (or Figure 13), dispose interleave unit 610 herein.With reference to figure 3, for example, data processor 650 can comprise group formatter 304, data deinterlacing device 305, packet format device 306, bag multiplexer 240 and preprocessor 250, and wherein preprocessor 250 comprises data randomizer 251, the RS coded/non RS of system encoder 252, data interleaver 253, odd even replacement device 254 and nonsystematic RS encoder 255.
In this, network code module 256 is the data coding of input, so that divide the data of symbolism and the data that will divide are sent to each trellis encoder according to the predefine method., a byte conversion is become 4 symbols herein, each symbol disposes by 2.And the symbol of creating from single data byte all is sent to the same mesh encoder.Therefore, the high position of each trellis encoder precoding incoming symbol is exported its as going up most carry-out bit C2 then.Alternatively, each trellis encoder then, is exported the low level grid coding of incoming symbol as two carry-out bit C1 and C0 with its.Block format device 620 Be Controlled make and the data byte from each symbol-byte converter output can be sent to different trellis encoder.
Hereinafter, describe the operation of block format device 620 in detail referring now to Figure 10 to Figure 13.With reference to Figure 13, for example,, will be input to the different trellis encoder of grid coding module 256 from symbol-byte converter 612 data byte of exporting and the data byte of exporting from symbol-byte converter 614 according to the control of block format device 620.For for simplicity, will be called X from the data byte of symbol-byte converter 612 outputs hereinafter, and will be called Y from the data byte of symbol-byte converter 614 outputs.With reference to Figure 15 (a), each numeral (that is, 0 to 11) is indicated the first to the 12 trellis encoder of grid coding module 256 respectively.
In addition, the output of two symbol-byte converter is set up (or aligning) in proper order, make to be input to the 0th to the 5th trellis encoder (0 to 5) of grid coding module 256 respectively from the data byte of symbol-byte converter 612 outputs, and will be input to the 6th to the 11st trellis encoder (6 to 11) of trellis encoder module 256 respectively from the data byte of symbol-byte converter 614 outputs.Herein, have the trellis encoder that is distributed in wherein, and to have the trellis encoder from the data byte of symbol-byte converter 614 outputs that is allocated in wherein only be the example that provides in order to simplify the understanding of the present invention from the data byte of symbol-byte converter 612 output.In addition, according to embodiments of the invention, and the input data of supposition piece processor 303 are with corresponding by the piece of 12 bytes configuration, and 612 outputs of symbol-byte converter are from 12 data bytes of X0 to X11, and 614 outputs of symbol-byte converter are from 12 data bytes of Y0 to Y11.
Figure 15 (b) illustrates the example of the data that are input to grid coding module 256.Particularly, Figure 15 (b) not only illustrates the example of the mobile service data that is input to grid coding module 256 but also illustrates the main business data that are input to grid coding module 256 and the example of RS parity data, so that be distributed to each trellis encoder.More specifically, shown in Figure 15 (a), pass group formatter 304 from the mobile service data of piece processor 303 outputs, mobile service data is mixed with main business data and RS parity data and output then thus.Therefore, after data interlacing,, respectively each data byte is input to 12 trellis encoder according to the position in the data set (or place).
Herein, when the trellis encoder that the dateout byte X of symbol- byte converter 612 and 614 and Y is assigned to separately, the input that can shown in Figure 15 (b), dispose each trellis encoder.More specifically, with reference to Figure 15 (b), from six mobile service data bytes (X0 to X5) of symbol-byte converter 612 output by first to six trellis encoder (0 to 5) of order assignment (or distribution) to grid coding module 256.And, the 7th and the 8th trellis encoder (6 and 7) that will give grid coding module 256 from 2 the mobile service data byte Y0 and the Y1 order assignment of symbol-byte converter 614 output.After this, in 5 main business data bytes, 4 data byte orders are distributed to the 9th and the 12nd trellis encoder (8 to 11) of grid coding module 256.At last, residue 1 byte of main business data byte is distributed to first trellis encoder (0) once more.
Shown in Figure 15 (b), suppose mobile service data, main business data and RS parity data are distributed to each trellis encoder.As mentioned above, suppose that also the input of piece processor 303 is disposed by 12 bytes, and will export from symbol-byte converter 612, and will export from symbol-byte converter 614 from 12 bytes of Y0 to Y11 from 12 bytes of X0 to X11.In this case, as shown in figure 15, block format device 620 is according to the order setting of X0 to X5, Y0, Y1, X6 to X10, Y2 to Y7, X11 and Y8 to the Y11 data bytes from symbol- byte converter 612 and 614 outputs.More specifically, based on the position (or place) of in transmit frame, inserting each data byte, determine to carry out the trellis encoder of encoding process.In this, not only mobile service data but also main business data, MPEG header data and RS parity data also are imported into grid coding module 256., suppose the information of the form of data set after block format device 620 notified (or knowing) is handled about data interlacing herein in order to carry out aforesaid operations.
Figure 19 illustrates the block diagram of carrying out the piece processor of encoding process according to the embodiment of the invention with the 1/N encoding rate.Herein, the piece processor comprises the symbol interleaver 741 of (N-1) number to 74N-1, and they dispose with parallel organization.More specifically, the piece processor with 1/N encoding rate comprises the branch of N number (or path) altogether, comprises the branch (or path) that is sent straight to block format device 730.In addition, the symbol interleaver 741 to 74N-1 of each branch each can dispose by the distinct symbols interleaver.In addition, with the symbol interleaver 741 to 74N-1 of (N-1) number in each respectively symbol-the byte converter 751 to 75N-1 of corresponding (N-1) number can be included in the ending of each symbol interleaver respectively.Herein, (N-1) dateout of the symbol-byte converter 751 to 75N-1 of number also is imported into block format device 730.
In example of the present invention, N is equal to or less than 12.If N equals 12, then block format device 730 can be aimed at dateout, and feasible output byte with the 12nd symbol-byte converter 75N-1 is input to the 12nd trellis encoder.Alternatively, if N equals 3, then block format device 730 can be provided with the output order, make and to be input to the 1st to the 4th trellis encoder of grid coding module 256 from the data byte of symbol-byte converter 720 outputs, and will be input to the 5th to the 8th trellis encoder, and will be input to the 9th to the 12nd trellis encoder from the data byte of symbol-byte converter 752 outputs from the data byte of symbol-byte converter 751 outputs.In this, can be from the order of the data byte of each symbol-byte converter output according to changing except the position in the data set of the data of mobile service data, they mix with the mobile service data of exporting from each symbol-byte converter.
Figure 20 illustrates the detailed diagram of the structure of piece processor according to another embodiment of the present invention., removed the block format device from the piece processor herein, making can be by the operation of group formatter execution block formatter.More specifically, the piece processor of Figure 20 can comprise byte-signal converter 810, symbol- byte converter 820 and 840 and symbol interleaver 830.In this case, the output with each symbol- byte converter 820 and 840 is input to group formatter 850.
And the piece processor can be by adding the encoding rate that symbol interleaver and symbol-byte converter obtain to expect.If system designer is wanted the encoding rate of 1/N, then the piece processor need be provided with the branch (or path) of the number of N altogether that comprises the branch (or path) that is sent straight to block format device 850; And with the symbol interleaver and the symbol-byte converter of (N-1) number of the parallel organization configuration of branch with (N-1) number.In this, group formatter 850 inserts the placeholder of the position (or place) of guaranteeing to be used for MPEG header, nonsystematic RS parity and main business data.And simultaneously, 850 pairs of data bytes from each branch's output of piece processor of group formatter position.
The number of the number of the number of Jian Yi trellis encoder, symbol-byte converter and symbol interleaver only is exemplary in the present invention.And therefore, corresponding number does not limit the spirit or scope of the present invention.It will be apparent to those skilled in the art that each the type and the position of data byte in each trellis encoder that is dispensed to grid coding module 256 can change according to the data set form.Therefore, should only not understand the present invention by the example that provides in the description of illustrating herein.To be input to group formatter 304 with 1/N encoding rate coding and from the mobile service data that piece processor 303 is exported.Herein, in example of the present invention, aim at and export from the order of the dateout of the block format device of piece processor 303 output according to the position of the data byte in data set.
Signaling information is handled
Can insert in a plurality of positions (or place) by using several different methods will send parameter according to transmitter 200 of the present invention, will send parameter then and send to receiving system.For for simplicity, the definition that send to the transmission parameter of receiving system from transmitter will be described now.Send parameter and comprise data burst message, area information in data set, the number of the RS frame of configuration superframe (promptly, super frame size (SFS)), the number (P) that is used for the RS parity data byte of every row in the RS frame, whether used be added with the verification of determining in the RS frame, to exist on the line direction mistake and, if used verification and then this verification and type and size (at present, add 2 bytes to CRC), partly dispose the number of the data set of a RS frame owing to the RS frame being sent to a burst, dispose the number identical (that is burst sizes (BS)) of number and data set in a burst of the data set of this RS frame, turbo pattern and RS pattern.
And, receive the needed transmission parameter of burst and comprise herein Burst Period, Burst Period with by corresponding to the value that begins from current burst to count to obtain up to next number of fields order of beginning of happening suddenly; The tab order of the RS frame of current transmission in superframe (that is the frame index of arrangement (PFI)) or in RS frame (burst) tab order (that is group index (GI)) of the group of current transmission; And burst sizes.According to the method for management burst, send parameter and comprise that also residue is up to the number of the field of next burst beginning the time (TNB) of next burst (that is, to).And by sending such as the information that sends parameter, each data set that is sent to receiving system can be indicated relative distance between current location and next burst beginning (or number).
Be included in the information that sends in the parameter with for the example that makes things convenient for the understanding of the present invention to provide corresponding.Therefore, the example of suggestion does not limit the scope of the invention or spirit, and can easily be changed or be revised by those skilled in the art.According to the first embodiment of the present invention,, can insert the transmission parameter by distributing the presumptive area of mobile service data bag or data set.In this case, receiving system is carried out synchronous and balanced to the received signal, and the signal that receives then is that unit decodes according to symbol.After this, bag is separated formatter and can be separated mobile service data and send parameter, sends parameter so that detect.According to first embodiment, can insert from group formatter 304 and send parameter, and send parameter then.
According to a second embodiment of the present invention, send parameter can with the data multiplex of another type.For example, when with given data and mobile service data when multiplexing, parameter can be sent but not given data is inserted the place (or position) that will insert the given data byte.Alternatively, sending parameter can mix with given data, and inserts the place that will insert the given data byte then.According to second embodiment, can insert from group formatter 304 or from packet format device 306 and send parameter, and send parameter then.
A third embodiment in accordance with the invention by the part of the reserve area in the field synchronization segments that is distributed in transmit frame, can be inserted the transmission parameter.In this case, because receiving system can be that unit carries out decoding according to symbol before detecting the transmission parameter to received signal, so can insert in the reserved field of field sync signal with having about the piece processor 303 and the transmission parameter of the information of the processing method of group formatter 304.More specifically, receiving system obtains field synchronization by using field synchronization segments, so that detect the transmission parameter from the precalculated position.According to the 3rd embodiment, can insert from Synchronous multiplexer 240 and send parameter, and send parameter then.
A fourth embodiment in accordance with the invention can will send the layer (or level zone) of parameter insertion than transport stream (TS) Bao Genggao.In this case, receiving system should received signal and in advance with received signal processing to the layer higher than the TS bag.In this, send parameter and can be used to prove the transmission parameter of the current signal that receives, and be provided at the transmission parameter of the signal that will receive in the later process.
In the present invention, according to first to fourth embodiment of the present invention, can insert and send and send the multiple transmission parameter of signal correction connection by using said method.In this, by only using among four above-mentioned embodiment, perhaps, perhaps, can insert and the transmission parameter by using whole the foregoing descriptions by using the selection of the foregoing description.In addition, in each embodiment, can duplicate and insert the information that sends in the parameter that is included in.Alternatively, can only needed information be inserted the appropriate section of corresponding embodiment, and send then.In addition, in order to ensure the robustness that sends parameter, can handle the block encoding that sends the parameter short circulation of execution (or cycle), and then, insert in the respective regions.Be used for can comprising to the method that sends parameter execution short period encoding process, for example, Kerdock coding, Bose-Chaudhuri-Hocquenghem Code, RS coding and the repeated encoding that sends parameter.And, also can carry out the combination of a plurality of block coding methods to sending parameter.
Sending parameter can be grouped, and to create the block code of less size, so that be inserted in the byte location that is used for signaling that distributes in the data set, and is sent out then.Yet in this case, block code passes from the piece of receiving terminal decoding, so that obtain to send parameter value.Therefore, should at first obtain the decode transmission parameter of needed turbo pattern and RS pattern of piece.Therefore, the transmission parameter that is associated with AD HOC can be inserted in the specific part in given data zone.And, in this case, can be used for decoding processing faster with the correlation of symbol.Receiving system is with reference to the correlation between each sequence and the current sequence that receives, thus definite coding mode and integrated mode.
Simultaneously, when the transmission parameter is inserted in field synchronization segments zone or the given data zone and is sent out then, and when the transmission parameter has been passed transmitting channel, reduced the reliability that sends parameter.Therefore, also can insert in a plurality of predefined patterns one according to corresponding transmission parameter.Herein, receiving system is carried out the correlation calculations between received signal and predefined pattern, so that identification sends parameter.For example, suppose based on the agreement between transmitting system and the receiving system and will comprise that the burst of 5 data sets is predefined for Mode A.In this case, when the group number in burst equaled 5, Mode A is inserted and sent to transmitting system.After this, receiving system is calculated in received data and is comprised correlation between a plurality of reference models of Mode A of prior establishment.In this, if in received data and the correlation maximum between the Mode A, then received data indication relevant parameters, and the most particularly, the group number in burst.In this, the group number can be confirmed to be 5.Hereinafter, will with the 3rd embodiment the processing of inserting and sending parameter be described according to of the present invention first, second now.
First embodiment
Figure 21 illustrates the schematic diagram that receives the group formatter 304 among the regional A that sends parameter and received transmission parameter is inserted data set according to the present invention.Herein, group formatter 304 receives mobile service data from piece processor 303.On the contrary, utilize in data randomization, RS frame encoding process and the piece processing procedure at least one to handle the transmission parameter, and can be input to group formatter 304 then.Alternatively, can be directly inputted to group formatter 304 with sending parameter, and not utilize any above-mentioned processing to handle.In addition, can provide the transmission parameter from service duplexer 100.Alternatively, also can in transmitter 200, generate and provide the transmission parameter.This transmission parameter can comprise that also receiving system is in order to receive and handle the needed information of the data that are included in the data set.For example, this transmission parameter can comprise data burst message and multiplexed information.
Figure 22 illustrates the example that receive to send the piece processor that parameter and utilization and mobile service data same treatment handle received transmission parameter is shown.Particularly, Figure 22 illustrates to illustrate and comprises that further signaling information provides the example of structure of Figure 10 of device 411 and multiplexer 412.More specifically, signaling information provides device 411 will comprise that the signaling information that sends parameter offers multiplexer 412.The output of multiplexer 412 multiplexing signaling informations and RS frame encoder 302.Then, multiplexer 412 outputs to byte-bit pad 401 with multiplexing data.
Byte-bit pad 401 will be divided into the position from the mobile service data byte or the signaling information byte of multiplexer 412 outputs, output to symbol encoder 402 then.Subsequent operation is identical with described in Figure 10 those.Therefore, for for simplicity, with the detailed description of omitting identical content.If any detailed structure of Figure 13, Figure 18, Figure 19 and piece processor 303 shown in Figure 20, then signaling information provides device 411 and multiplexer 412 can be set at byte-signal converter back.
Second embodiment
Simultaneously, when the respective regions that will insert according to the given data that predetermined rule generates from the group formatter in the data set, parameter can be sent but not given data is inserted at least a portion in the zone that can insert given data.For example, when given data sequence that will be long insert regional A in the data set begin to locate the time, can send parameter but not given data is inserted at least a portion of beginning of regional A.Be inserted into the part of the given data sequence in the remainder of regional A, do not comprise and inserted the part that sends parameter, can be used to detect the starting point of data set by receiving system.Alternatively, another part of regional A can be used to the channel equalization by receiving system.
In addition, when sending parameter but not actual given data when inserting in the given data zone, sending parameter can be by block encoding in the short period, and is inserted into then.And, as mentioned above, also can send parameter based on inserting according to the predefined pattern that sends parameter.If group formatter 304 with the given data placeholder but not actual given data insert in the zone of the data set can insert given data, then can insert and send parameters by packet format device 306.More specifically, when group formatter 304 inserted the given data placeholder, packet format device 306 can insert given data, but not the given data placeholder.Alternatively, when group formatter 304 inserts given data, known can data directly outputs with not revising.
Figure 23 illustrates to illustrate according to being expanded of the embodiment of the invention and makes packet format device 306 can insert the block diagram of the structure of the packet format device 306 that sends parameter.More specifically, the structure of packet format device 306 further comprises given data maker 351 and signal multiplex device 352.Herein, the transmission parameter that is imported into signal multiplex device 352 can comprise information, indicate the information of position that the group in next burst starting point, the burst exists and group length about current burst length, about the information of time of current group in happen suddenly and next group and about the information of given data.
And, when sending parameter but not given data when being inserted in the given data placeholder, send parameter can be in the short period by block encoding and insert.Alternatively, can insert predefined pattern according to sending parameter.More specifically, signal multiplex device 352 multiplexing given datas and transmission parameter (perhaps by the pattern that sends parameter-definition) are so that dispose new given data sequence.Then, the signal multiplex device 352 given data sequence that will newly dispose outputs to packet format device 306.Packet format device 306 is deleted main business data placeholder and RS parity placeholder from the output of data interleaver 305, and creates the mobile service data bag of 188 bytes by the output of using mobile service data, MPEG header and signal multiplex device.Then, the mobile service data bag that will newly create of packet format device 306 exports bag multiplexer 240 to.
In this case, the regional A of each data set has different known data patterns.Therefore, receiving system only will be separated at the symbol that presets in the part of given data sequence, and the Symbol recognition of being separated is the transmission parameter.,, given data can be inserted different masses herein, such as packet format device 306, group formatter 304 or piece processor 303 according to the design of transmitting system.Therefore, parameter can be sent but not given data is inserted and will be inserted in the piece of given data.
According to a second embodiment of the present invention, can will comprise that the transmission parameter about the processing method information of piece processor 303 inserts in the part in given data zone, and send then.In this case, the symbol processing method and the position of actual transmission parameter symbol have been determined to be used for.And, should locate the position that sends the parameter symbol, so that earlier be sent out or receive than any other decoded data symbol.Therefore, before decoded symbol data was handled, receiving system can detect the transmission symbol, so that detected transmission symbol is used for decoding processing.
The 3rd embodiment
Simultaneously, also can insert in the field synchronization segments zone, and send then sending parameter.Figure 24 to illustrate and to illustrate that parameter is inserted in the field synchronization segments zone and the block diagram of the Synchronous multiplexer that is expanded in order allowing to send.Herein, signal multiplex device 261 further is included in the Synchronous multiplexer 260.The transmission parameter of general VSB method is disposed by 2 fields.More specifically, each is disposed by a field synchronization segments and 312 data segments.Herein, the one 4 symbol of data segment is corresponding with the section sync section, and first data segment of each is corresponding with the field synchronization part.
A field sync signal is configured to have the length of a data segment.Data segment sync pattern is present in the one 4 symbol, follow then thereafter be pseudo random sequence PN 511, PN63, PN 63 and PN 63.Next 24 symbol comprises the information that is associated with the VSB pattern.In addition, 24 symbols that comprise the information that is associated with the VSB pattern are remaining 104 symbols subsequently, and these are stets.Herein, last 12 symbols of first leading portion are replicated and are positioned in last 12 symbols in the reserve area.In other words, only 92 symbols in field synchronization segments are and the corresponding symbol of actual reserve area.
Therefore, it is multiplexing with the field synchronization segments symbol that has existed that signal multiplex device 261 will send parameter, makes to insert in the reserve area of field synchronization segments sending parameter.Then, signal multiplex device 261 with multiplexing transmission parameter output to Synchronous multiplexer 260.Synchronous multiplexer 260 multiplex section synchronizing symbols, data symbol and the new field synchronization segments of exporting from signal multiplex device 261, thus new transmit frame disposed.The transmit frame that will comprise field synchronization segments outputs to transmitting element 270, has inserted the transmission parameter in this transmit frame.In this, being used to insert the reserve area in field synchronization segments that sends parameter can be corresponding with whole 92 symbols or the part of reserve area.Herein, for example, be inserted into transmission parameter in the reserve area and can for example comprise and to send the information that parameter identification is main business data, mobile service data or dissimilar mobile service data.
If the information about the processing method of piece processor 303 is sent out as a part that sends parameter, and when receiving system wishes to carry out with piece processor 303 corresponding decoding processing, should notify receiving system about the such information of piece processing method, so that carry out decoding processing.Therefore, should be known before the piece decoding processing about the information of the processing method of piece processor 303.Therefore, as in the third embodiment of the present invention, describing, in will having the reserve area that inserts field sync signal about the transmission parameter of the information of the processing method of piece processor 303 (and/or group formatter 304) and when sending then, receiving system can detect this before to received signal execution block decoding processing and send parameter.
Receiving system
Figure 25 illustrates the block diagram that illustrates according to the structure of digital broadcast receiving system of the present invention.The digital broadcast receiving system of Figure 25 uses given data information, and this information is inserted in the mobile service data part, and is sent out system's transmission then, and carrier synchronization is recovered, frame synchronization is recovered and channel equalization so that carry out, thereby strengthens receptivity.With reference to Figure 25, digital broadcast receiving system comprises that tuner 901, demodulator 902, equalizer 903, known data detector 904, block decoder 905, data are separated formatter 906, RS frame decoder 907, separated randomizer 908, data deinterlacing device 909, RS decoder 910 and data are separated randomizer 911.Herein, for the present invention describe easy, data are separated formatter 906, RS frame decoder 907 and are separated randomizer 908 and will be collectively referred to as the mobile service data processing unit.And data deinterlacing device 909, RS decoder 910 and data are separated randomizer 911 will be collectively referred to as the main business data processing unit.
More specifically, the frequency of tuner 901 tuning particular channels, and tuned frequency down conversion become intermediate frequency (IF) signal.Then, tuner 901 the IF signal of down-conversion export demodulator 902 and known data detector 904 to.The IF signal that 902 pairs of demodulators are imported is carried out from gain controlling, carrier wave and is recovered and regularly recover to handle, thereby the IF modification of signal is become baseband signal.Then, the baseband signal that will newly create of demodulator 902 exports equalizer 903 and known data detector 904 to.Equalizer 903 compensation is included in the channel distortion in the restituted signal, and then the signal of compensating error output to block decoder 905.
In this, known data detector 904 detects by the known array place of transmitting terminal from I/O data (that is, the data before demodulation process, or the data after the demodulation process) insertion of demodulator 902.After this, will output to demodulator 902 and equalizer 903 together with the symbol sebolic addressing of given data from the location information of detected ground dot generation.And known data detector 904 exports ensemble of communication to block decoder 905.This ensemble of communication is used to allow block decoder 905 signs of receiving system to utilize the mobile service data of handling from the additional code of transmitting system, and the main business data of not utilizing additional code to handle.In addition, though in Figure 25 not shown connection status, can be used for whole receiving system from known data detector 904 detected information, and also can be used in data and separate in formatter 906 and the RS frame decoder 907.Demodulator 902 uses the given data symbol sebolic addressing in timing and/or carrier wave between convalescence, thereby strengthens demodulation performance.Similarly, equalizer 903 uses given data, so that strengthen equalization performance.In addition, the decoded result of block decoder 905 can be fed back to equalizer 903, thereby strengthens equalization performance.
Herein, as shown in Figure 6, the data set that input is used for equilibrium treatment is divided into regional A to zone C.More specifically, in example of the present invention, each regional A, B and C further are divided into regional A1 to A5 respectively, area B 1 and B2 and zone C 1 are to C3.With reference to figure 6, the CIR of the field synchronization data estimation from data structure is called as CIR_FS.Alternatively, each in 5 given data sequences from be present in regional A and the CIR that estimates is called CIR_N0, CIR_N1, CIR_N2, CIR_N3 and CIR_N4 in proper order.
As mentioned above, the present invention uses the CIR from field synchronization data and given data sequencal estimation, so that the data in data set are carried out channel equalization.In this, according to each the regional characteristic in data set, can directly use each CIR among the estimated CIR.Alternatively, also can carry out interpolation or extrapolation,, then, it is used for channel equalization so that create new CIR to a plurality of estimated CIR.
Herein, when the value F (A) of known function F at specified point A (x) and the value F (B) in the function F (x) of another specified point B, interpolation refers to the functional value of the point in the part of estimation between an A and B.Linear interpolation is corresponding with the simple form in large-scale interpolation operation.Linear interpolation described herein may only be exemplary in the interpolating method on a large scale.And therefore, the present invention is not limited only to illustrated example herein.
Alternatively, when the value F (A) of known function F at specified point A (x) and the value F (B) in the function F (x) of another specified point B, extrapolation refers to the functional value of the point of estimation outside the part between an A and the B.Linear extrapolation is the simplest form in large-scale extrapolation operation.Similarly, linear extrapolation described herein only is exemplary in possible on a large scale extrapolation method.And, therefore, the example that the present invention is not limited only to set forth herein.
More specifically, under the situation of zone C 1, the CIR_N4 that estimates from previous data set, the CIR_FS that estimates from the current data group that will utilize channel equalization and any one and the CIR_N0 that are undertaken the new CIR that extrapolation generates by the CIR_FS to the current data group can be used to carry out channel equalization.Alternatively, under the situation of area B 1,, can use several different methods as described at the situation of zone C 1.For example, by being used to carry out channel equalization by new CIR and the CIR_N0 that the CIR_FS that estimates according to the current data group is carried out the linear extrapolation establishment.And the CIR_FS that estimates from the current data group also can be used to carry out channel equalization.At last, under the situation of regional A1,, can create new CIR, then it is used to carry out channel equalization by CIR_FS and the CIR_N0 that estimates from the current data group carried out interpolation.In addition, can be used to carry out channel equalization from the CIR_FS of current data group estimation and any one the CIR_N0.
Under the situation of regional A2 to A5, can carry out interpolation to CIR_N (i-1) and the CIR_N (i) that estimates from the current data group, be used to carry out channel equalization with the CIR that creates new CIR and will newly create.And, can be used to carry out channel equalization from the CIR_N (i-1) of current data group estimation and any one the CIR_N (i).Alternatively, under the situation of area B 2, C2 and C3, can carry out extrapolation,, then it is used to carry out channel equalization to create new CIR to CIR_N3 and the CIR_N4 that all estimates from the current data group.In addition, the CIR_N4 that estimates from the current data group can be used to carry out channel equalization.Therefore, when the data in the insertion data set are carried out channel equalization, can obtain optimum performance.As mentioned above, the method for the needed CIR of execution channel equalization only is the example that provides for the promotion the understanding of the present invention in acquisition each zone in data set.Also can use wider method herein.And therefore, the present invention will be not limited only to the example that provides in the illustrated herein description.
Simultaneously, if with corresponding to its mobile service data of carrying out additional code and grid coding, then the data of being imported are carried out the opposite processing as transmitting system of trellis decode and additional decoding processing by transmitting system in the data that after equalizer 903 channel equalizations, are input to block decoder 905.Alternatively, if be input to the data of block decoder 905 and only it carried out grid coding and does not have the main business data of additional code corresponding, then only the data of being imported are carried out trellis decode and handle, as the opposite processing of transmitting system.
To be input to data by the data set of block decoder 905 decodings and separate formatter 906, and the main business data will be input to data deinterlacing device 909.According to another embodiment, key data also can be walked around block decoder 905, so that be directly inputted to data deinterlacing device 909.In this case, the grid decoder that is used for the main business data should be arranged on before the data deinterlacing device 909.When block decoder 905 outputs to data when separating formatter 906 with data set, the RS parity that removes the given data, grid initialization data and the MPEG header that are inserted into data set and add by the RS encoder/nonsystematic RS encoder or the nonsystematic RS encoder of transmitting system.Then, the data of having handled are outputed to data and separate formatter 906., can before the piece decoding processing, carry out removing of data herein, perhaps can during the piece decoding processing or afterwards, carry out.If transmitting system comprises signaling information in data set when sending, then this signaling information is outputed to data and separate formatter 906.
More specifically, if the data of being imported are corresponding with the main business data, then the decoded 905 pairs of data of being imported of piece are carried out the Viterbi decoding, so that hard (hard) determined value of output, or soft (soft) determined value carried out determine firmly, thereby export this result.Simultaneously, if the data of being imported are corresponding with mobile service data, then block decoder 905 outputs are with respect to the hard determined value or the soft determined value of the mobile service data of being imported.In other words, if the data of being imported are corresponding with mobile service data, then 905 pairs of block decoders are carried out decoding processing by the piece processor of transmitting system and the data of grid coding module coding.
In this, the RS frame encoder that is included in the preprocessor in the transmitting system can be regarded as foreign key.And piece processor and trellis encoder can be regarded as internal code.In order to make the maximizing performance of foreign key when the such level joined mark (concatenated code) of decoding, the decoder of internal code should be exported soft determined value.Therefore, block decoder 905 can be exported the hard determined value about mobile service data.Yet when needs, block decoder 905 can more preferably be exported soft determined value.
Simultaneously, data deinterlacing device 909, RS decoder 910 and to separate randomizer 911 be to receive needed of main business data.Therefore, in the structure of the digital broadcast receiving system that only receives mobile service data, may not need above-mentioned.Data deinterlacing device 909 is carried out the reverse process that is included in the data interleaver in the transmitting system.In other words, data deinterlacing device 909 will be from the main business data deinterlacing of block decoder 905 output, and the main business data of deinterleaving have outputed to RS decoder 910.910 pairs of RS decoders are the data executive system RS decoding processing of deinterleaving, and the data that will handle output to and separate randomizer 911.Separate randomizer 911 and receive the output of RS decoders 910, and generate be included in digital broadcasting transmission system in the identical pseudo-random data byte of pseudo-random data byte of randomizer.After this, separate pseudo-random data byte execution step-by-step XOR (XOR) computing that 911 pairs of randomizers are generated, thereby, be the data of unit so that export with 188 byte main business packets with the beginning that MPEG inserts each bag with step.
Simultaneously, will output to the data of separating formatter 906 from block decoder 905 imports with the form of data set.In this, data are separated the structure that formatter 906 has been known the data that will import, and therefore, can comprise the signaling information and the mobile service data of system information from this data set sign.After this, data are separated the signaling information that formatter 906 will identify and are outputed to the piece that is used for processing signaling information (not shown), and the mobile service data that will identify outputs to RS frame decoder 907.More specifically, RS frame decoder 907 only receives from data and separates the mobile service data that RS encodes and CRC encodes that formatter 906 sends.
Figure 26 illustrates a series of illustrative steps of handling according to the error correction decoding of RS frame decoder 907 of the present invention.More particularly, RS frame decoder 907 will be separated the mobile service data byte packet that formatter 906 receives from data, so that configuration RS frame.Mobile service data is with corresponding from transmitting system RS coding and CRC coded data.Figure 26 (a) illustrates the example of configuration RS frame.More specifically, the transmitting system RS frame that will have (N+2) * 235 sizes is divided into the 30*235 block of bytes.When supposition is inserted each data set with each mobile service data block of bytes of dividing and is sent then, receiving system also will be inserted the 30*235 mobile service data block of bytes grouping of each data set respectively, thus the RS frame that configuration has (N+2) * 235 sizes.For example, the RS frame is divided into 18 30*235 block of bytes and when burst part sent, receiving system also will be in the mobile service data byte packet of 18 data sets in the corresponding burst part, so that dispose the RS frame when supposition.In addition, (that is, in the time of N=538), RS frame decoder 907 can be with the mobile service data byte packet in 18 data sets that are included in the burst, so that the RS frame that configuration has the 540*235 byte-sized when supposition N equals 538.
Herein, when 905 outputs of supposition block decoder were used for the soft determined value of decoded result, RS frame decoder 907 can be determined " 0 " and " 1 " of corresponding positions by the code that uses soft determined value.8 of each of Que Dinging are grouped to create 1 data byte as mentioned above.If all soft determined values that comprise 18 data sets in the single burst are carried out above-mentioned processing, then can dispose RS frame with 540*235 byte-sized.In addition, the present invention uses soft determined value not only to dispose RS frame but also the mapping of configuration reliability.Herein, the reliability of reliability mapping indication corresponding data byte, this corresponding data byte is by disposing 8 groupings, and these 8 codes by soft determined value are determined.
For example, when the absolute value of soft determined value surpasses predetermined threshold, will be defined as reliably by the value of the definite corresponding positions of the code of corresponding soft determined value.On the contrary, when the absolute value of soft determined value surpasses predetermined threshold, be defined as the value of corresponding positions insecure.After this, if that will determine by the code of soft determined value and grouping with dispose among 8 of 1 data byte in addition single position be defined as insecurely, then this corresponding data byte is marked as insecure data byte on reliability is shone upon.
Herein, the reliability of determining 1 data byte only is exemplary.More specifically, when a plurality of data bytes (for example, at least 4 data bytes) are confirmed as when insecure, the corresponding data byte also can be marked as the corrupt data byte in the reliability mapping.On the contrary, when all data bit in this 1 data byte be confirmed as when reliable (, when the absolute value of all 8 the soft determined values in being included in 1 data byte surpasses predetermined threshold), the corresponding data byte is marked as the authentic data byte in the reliability mapping.Similarly, when a plurality of data bytes (for example, at least 4 data bytes) are confirmed as when reliable, the corresponding data byte also can be marked as the authentic data byte in the reliability mapping.The numeral of advising in above-mentioned example only is exemplary, and therefore, does not limit the scope of the invention or spirit.
Can carry out the processing of the configuration RS frame that all uses soft determined value and the processing of configuration reliability mapping simultaneously.Herein, the reliability information in the reliability mapping is corresponding one by one with each byte in the RS frame.For example, if the RS frame has the size of 540*235 byte, then the reliability mapping also is configured to have the size of 540*235 byte.Figure 26 (a ') illustrates the treatment step according to configuration reliability mapping of the present invention.Simultaneously, if the RS frame is configured to have (N+2) * 235 byte-sized, then 907 pairs of corresponding RS frames of RS frame decoder are carried out the processing of CRC fault bit check, thereby whether checking any mistake occurred in every row.Subsequently, shown in Figure 26 (b), with 2 byte verifications with remove, has the RS frame of N*235 byte-sized with configuration.Herein, with the corresponding error flag of every row on the appearance (or exist) of misdirection.Similarly, shown in Figure 26 (b ') since with the part of CRC check and the mapping of corresponding reliability almost without any application, so this part is removed, make the reliability information byte that only remains the N*235 number.
After carrying out the processing of CRC fault bit check, RS frame decoder 907 is carried out the RS decoding on column direction.Can carry out RS according to the number of crc error sign herein, and wipe the correction processing.More specifically, shown in Figure 26 (c), verified and the corresponding crc error sign of the every row in the RS frame.After this, when carrying out the RS decoding processing on column direction, whether RS frame decoder 907 definite numbers that the row of crc error wherein takes place are equal to or less than and can carry out the mistake that RS wipes the maximum number of correction to it.The maximum number of mistake is corresponding with the number of the parity byte of inserting when carrying out the RS encoding process.In an embodiment of the present invention, suppose and add 48 parity bytes to every row.
Shown in Figure 26 (d), if wherein occur the number of the row of crc error be less than or equal to can wipe the mistake that decoding processing corrects by RS maximum number (promptly, 48 mistakes according to this embodiment), then on column direction, the RS frame of row with 235N byte is carried out (235,187)-RS and wipe decoding processing.After this, shown in Figure 26 (f), the 48 byte parity datas that are added to every row ending are removed.Yet, on the contrary, if the number of row that crc error wherein occurs can't be carried out RS and wipe decoding processing greater than the mistake (that is, 48 mistakes) that can wipe the maximum number that decoding processing corrects by RS.In this case, can correct a mistake by carrying out general RS decoding processing.In addition, the reliability mapping of having created based on soft determined value and RS frame can be used for further strengthening error correcting capability of the present invention (or performance).
More specifically, RS frame decoder 907 is compared the absolute value of the soft determined value of block decoder 905 with predetermined threshold, so that determine the reliability by the definite place value of the code of corresponding soft determined value.And, with 8 groupings determining by the code of soft determined value respectively to form 1 data byte.Therefore, in reliability mapping indication about the reliability information of this 1 data byte.Therefore, shown in Figure 26 (e), even determine to have mistake in this particular row based on the CRC fault bit check of particular row is handled, the present invention does not suppose in all bytes that are included in this row yet and has mistake.The present invention is with reference to the reliability information of reliability mapping, and only has been confirmed as insecure byte and is set to error byte.In other words, no matter whether there is a crc error in corresponding line, only mapping is defined as insecure byte and is set to wipe a little based on reliability.
According to other method, when definite crc error is included in the corresponding line,, only is defined as insecure byte and is set to mistake by the reliability mapping based on CRC fault bit check result's result.More specifically, only be confirmed as based on reliability information comprising wrong and be defined as the corresponding byte of insecure row and be set to wipe a little.After this, if the number of the erroneous point of every row is less than or equal to the mistake (that is, 48 mistakes) that can wipe the maximum number of decoding processing correction by RS, then respective column is carried out RS and wipe decoding processing.On the contrary, if the number of the erroneous point of every row is then carried out general decoding processing to respective column greater than the mistake (that is, 48 mistakes) that can wipe the maximum number that decoding processing corrects by RS.
More specifically, if greater than the mistake that can wipe the maximum number that decoding processing corrects by RS (promptly comprising the number of the row of crc error, 48 mistakes), then, the row of determining based on the reliability information of reliability mapping are carried out RS wipe decoding processing or general RS decoding processing according to a little the number wiped in the respective column.For example, suppose that the number of the row that comprises crc error in the RS frame is greater than 48.And, suppose that also a little the number of determining based on the reliability information of reliability mapping wiped is indicated as 40 and wipes a little in first is listed as, and in secondary series, be indicated as 50 and wipe a little.In this case, first row are carried out (235,187)-RS and wipe decoding processing.Alternatively, secondary series is carried out (235,187)-RS decoding processing.Shown in Figure 26 (f),, when carrying out the error correction decoding processing on all column directions in the RS frame, the 48 byte parity datas that are added on the ending of every row are removed when by using above-mentioned processing.
As mentioned above, when determining to have the byte number of low reliability class based on the reliability information of the mapping of the reliability in the particular column, even with the total number of the corresponding crc error of every row in the RS frame greater than the mistake that can wipe the maximum number that decoding processing corrects by RS, also particular column is carried out error correction decoding.Wipe the number that difference between the decoding processing is the mistake that can correct at general RS decoding processing and RS herein.More specifically, when carrying out general RS decoding processing, can be repaired mistake (for example, 24 mistakes can be repaired) with half (that is (parity byte number)/2) corresponding error number of the parity byte number that during the RS encoding process, inserts.Alternatively, when execution RS wipes decoding processing, can be repaired mistake (for example, 48 mistakes can be repaired) with the corresponding error number of during the RS encoding process, inserting of parity byte number.
Shown in Figure 26 (f), as mentioned above, after carrying out the error correction decoding processing, can obtain RS frame by 187 N byte row (or bag) configuration.In addition, the RS frame with N*187 byte-sized is unit output with 187 bytes of N number.Herein, shown in Figure 26 (g), will be added on the ending of each 187 byte packet by the 1 byte MPEG sync byte that transmitting system removes, thereby export 188 byte mobile service data bags.
As mentioned above, has following advantage according to digit broadcasting system of the present invention and data processing method.More specifically, contingent any mistake when sending mobile data according to digital broadcast receiving system of the present invention and method height defence (or opposing) by channel.And the present invention and conventional receiving system be highly compatible also.In addition, even in the channel with serious ghost effect and noise, the present invention can not have any mistake ground yet and receives mobile service data.
In addition, by in the ad-hoc location (or place) that given data is inserted the data area and send the data handled,, also may strengthen the receptivity of receiving system even in being easy to the channel circumstance of frequent variations.And, by with mobile service data and main business data multiplex in burst structure, can reduce the power consumption of receiving system.In addition, when being applied to move with portable receiver, the present invention even more effective moves and portable receiver also is subject to the influence of channel frequent variations, and needs the strong noise of defence (or opposing).
Hereinafter, will the example of the temporal information of transmission/reception main business data and mobile service data be described when the multiplexing data of the multiplexing main business data of broadcast transmission/receiving system and mobile service data and transmission.Herein, provide temporal information with the form of the table that comprises at least one part, and will be referred to as listing information hereinafter.For example, listing information can become the information according to specific program information (PSI)/program and system information protocol (PSIP).Hereinafter, fixedly the receive channel indication can allow the channel of broadcast system transmission/reception main business data, and the indication of mobile receive channel can allow the channel of broadcast system transmission/reception mobile service data.
Hereinafter, the processing that broadcast transmission/receiving system place obtains temporal information will be described in.This broadcast receiver system obtains temporal information from broadcast transmission system.For example, as mentioned above, based on the mobile broadcast transmission/receiving system of ATSC system by listing information acquisition temporal information such as system time table (STT).
Figure 27 is the view that the STT that can be used for the ATSC system is shown.This STT is used to send current date and time.In the ATSC system, the PID that is used to transmit the transport stream of STT is 0xIFFB, and whether the transport_scrambling_control indication is " 00 " by the pay(useful) load of the bag of scrambling.Owing in listing information adaptation fields is not set, adaptation_field control has value " 01 ".
As shown in figure 27, the table_id of STT is 8 bit fields that are configured to 0xCD.Section_syntax_indicator is configured to 11 bit field, and the MPEG of indication long form.Private_indicator is configured to 11 bit field, and section_length is 12 bit fields of the length of this part of indication.In STT, table_id_extension is configured to 0, and version_number is the version number of this part of indication and is configured to 05 bit fields.Current_next_indicator is indication to be configured to 11 bit identifier when the application of forward part and in the STT part.Section_number is 8 bit fields, because STT has a partial-length, it has value 1.Last_section_number is configured to 08 bit fields.Protocol_version is configured to 08 bit fields in STT.
System_time is 32 bit fields, its indication from the 00:00:00UTC time over and done with the counting of global positioning system (GPS) second.Therefore, system_time becomes temporal information based on Coordinated Universal Time(UTC) (UTC) (that is, with respect to standard time temporal information).
GPS_UTC_offset indication is poor between the time of the gps time of unit and UTC with the second.For gps time being converted to the UTC time, deduct GPS_UTC_offset from gps time.
Daylight_saving is 2 byte datas, and it is used to consider to use in Korea S the period of the time that is called as the daylight-saving time.Daylight_saving comprises that identifier DS_status that indication used daylight saving time (daylight saving time) and still used the standard time, the moon of indication when using or having cancelled daylight saving time day identifier DS_day_of_month and indication are used or the identifier DS_hour of the time when cancelling daylight saving time.
STT can have the descriptor of variable-length.
Broadcast receiver system comprises the system clock by operating system (OS) management.If system clock is in manual mode, then keep the time that manually is provided with by the user.Alternatively, if system clock is in automatic mode, and by the user time zone (using the zone of local zone time) of considering setting automatically and the information of saving in the daytime are set, then system clock uses the temporal information that comprises the time (such as the UTC time) that sends from the broadcasting station of using this configuration information to come the maintenance system time.For example, broadcast receiver system calculates the local zone time in this time zone from the time zone that the user is provided with, and uses the local zone time that calculates broadcast receiver system from the UTC time that broadcast singal receives, and system time is set based on the time of being calculated.
Yet during receiving broadcast signal, change according to the time zone zone time, therefore, should change the system time of broadcast receiver system when broadcast receiver system can move between the time zone.Because broadcast receiver system is from the time of broadcasting station reception such as the UTC time in the zone that this broadcast receiver system was positioned at, and based on received computing system time time, so the user should change the time of broadcast receiver system or change time-zone information.If changed the system time that is kept by broadcast receiver system, then broadcast receiver system can't broadcasted according to this regional correct time output, and can't be in the broadcast message according to this regional correct time output such as EPG.
Figure 28 illustrates the view that broadcast receiver system obtains the example of temporal information.For example, suppose that this broadcast receiver system is positioned at New York.Suppose that New York belongs to the time zone, east, and East Time is 10:30 in the morning.Suppose that the temporal information that receives from the broadcasting station is the UTC time.
If this broadcast receiver system is positioned at the time zone, east, then user 10:30 in the morning is set to the local zone time in this broadcast receiver system, early 5 hours this time ratio UTC time.If this broadcast receiver system moves to Los Angeles (LA), then the time difference between the local zone time of time that is provided with in this broadcast receiver system and LA is 3 hours.That is to say that the local zone time in Los Angeles is 7:30 in the morning, this time is followed the pacific time zone, and than the UTC time Zao 8 hours.Therefore, if this broadcast receiver system receives and handles the broadcast singal from the broadcasting station that is positioned at LA, and the user does not reset the time of broadcast receiver system, and then when handling this broadcast singal, the time difference between the time of original setting and the local zone time of LA causes makeing mistakes.
For example, suppose the current time in the broadcast singal of LA, in EIT, presented two broadcast event.Suppose that these two airtimes comprise the program that is entitled as " escaping from prison ", this program begins at the 14:00UTC of LA (local zone time point in the mornings 6); And the program that is entitled as " Rome ", this program begins at 15:30UTC (local zone time 7:30 in the morning).
Because the EIT that receives of this broadcast receiver system comprises the temporal information according to UTC, thus this broadcast receiver system may be in programme information the rise time mistake.For example, if broadcast receiver system extracts information relevant with broadcast program and output electronic program guides (EPG) from EIT information, then this broadcast receiver system is according to exporting program " escaping from prison " according to the time of East Time setting in the morning 9 beginnings and " program Rome " information that 10:30 begins in the morning.Therefore, when broadcast receiver system moves to LA since be included in actual reception to broadcast singal in temporal information be not equal to the temporal information of broadcast receiver system, so when exporting broadcast message, operating mistake may occur.That is to say that the time started that is included in the program in the broadcast singal that is received by broadcast receiver system is the UTC time.Therefore, if when the UTC time becomes local zone time according to the time zone time in the broadcast receiver system, broadcast receiver system changes over East Time with the time started of program.Because the time difference between the temporal information in the zone that the temporal information that changed and this broadcast receiver system are currently located at is 3 hours, so can't provide information to the user according to this correct time.
Figure 29 be illustrate comprise according to the temporal information in zone the view of temporal information of broadcast singal.If broadcast transmission/receiving system sends/is received in the broadcast singal shown in the example of Figure 29, though broadcast receiver system receiving broadcast signal when moving then when the processing broadcast singal, mistake can not occur.Broadcast transmission device (broadcasting station) can send this transmitter the time zone identifier and according to the time of this time-zone information and at least one in the time difference between the standard time.Though Figure 29 shows the example that the regional change of indicating broadcast receiver system to receive broadcast program by descriptor still allows the information of accurate processing time information.For example, descriptor shown in Figure 29 can be included in the descriptor of STT for example shown in Figure 27 (perhaps can be included in another descriptor of PSI/PSIP).The descriptor of Figure 29 comprises the descriptor_length of the length of the descriptor_tag that is used to identify descriptor and indication descriptor.Figure 29 shows and comprises as the time_zone_name_length of the variable-length of the time_zone_name that is used to be provided with the time zone title and as the example of the time_zone_name of time zone title.
As shown in figure 29, broadcast receiver system can receive time zone identifier information time_zone_id from the broadcasting station.If broadcast receiver system is from the temporal information of broadcast singal reception according to the zone, then can receive the local zone time in time-zone information, time zone in broadcast reception zone and the time difference information time_zone_offset between the standard time and indication should the time difference and the standard time addition still subtract each other (that is to say, local zone time be later than or early than the standard time) polarity information time_zone_offset_polarity.Standard time can be the UTC time.
Broadcast transmission/receiving system can only send/receive the time zone identifier time_zone_id from broadcast singal.In this case, broadcast receiver system can be with the time difference information of the storage of form for example with the standard time, and use received time zone identifier to calculate local zone time.Again for example, broadcast transmission/receiving system can only send/receive from the local zone time of broadcast singal and time difference time_zone_offset between the standard time and polarity information time_zone_offset_polarity.In this case, broadcast receiver system can calculate local zone time from the UTC that receives from STT.
Figure 30 is the view that temporal information shown in Figure 29 is shown.The time zone that distributes in the U.S. comprises for example east (EST), middle part (CT), mountain region (MT), the Pacific Ocean (PT), Alaska and Hawaii.According to the example of Figure 29, the time zone title is arranged to east, middle part, mountain region, the Pacific Ocean, Alaska and Hawaii.In Figure 30, the time zone identifier is configured to 0x00 (east branch), 0x01 (middle part), 0x02 (mountain region), 0x04 (Alaska) and 0x05 (Hawaii).If the polarity information time_zone_offset_polarity that the time in indication time zone was later than still early than the standard time is " 0 ", then the time in time zone is early than the standard time, if and polarity information time_zone_offset_polarity is " 1 ", then the time in time zone is later than the standard time.Therefore, because the polarity information time_zone_offset_polarity in time zone is 1, and the time in all time zones is later than the standard time (UTC time), then by deduct the time that time-zone information time_zone_offset can calculate the time zone from the standard time (UTC time).Time difference information time_zone_offset between the time in standard time and time zone is 5 hours with respect to EST, with respect to CT is 6 hours, is 7 hours with respect to MT, is 8 hours with respect to PT, with respect to Alaska is 9 hours, and is 10 hours with respect to Hawaii.
Figure 31 illustrates the conceptual view of broadcast receiver system reception according to the example of the broadcast singal of the example of Figure 29.The example class of Figure 31 is similar to the example of Figure 28.Suppose to/from listing information transmission/reception temporal information shown in Figure 29 such as STT.
The broadcast receiver system of being arranged to 10:30 in the morning time in time zone, east moves to the pacific time zone.This broadcast receiver system can receive the UTC time as the standard time of STT from the pacific time zone.In addition, broadcast receiver system can receive the temporal information according to time_zone_descriptor shown in Figure 30.Broadcast receiver system obtains " Pacific time " as time zone title time_zone_name from the time_zone_descriptor of STT, and " 0x03 " is (PT) as the time zone identifier.Broadcast receiver system obtains " 1 " as polarity information time_zone_offset_polarity, and " 8 " are as the time in this time zone and the time difference time_zone_offset between the standard time.Therefore, even when broadcast receiver system moves to LA, broadcast receiver system also can will be arranged to 7:30 in the morning current time from broadcast singal, 8 hours evenings time of this time ratio UTC.Can export EPG information according to the pacific time zone.
Figure 32 is the flow chart of diagram from the example of broadcast singal receiving time information.Describe from the example of the temporal information of broadcast singal receiving area below with reference to Figure 32.Can receive the broadcast receiver system energized (S11) of mobile service data.
From airtime demultiplexing listing information, in this listing information, be provided with the time zone identifier, perhaps this broadcast system the time and time difference between the standard time (S12) in time zone.For example, listing information can be STT.Can be with this STT of interval transmission/reception of 1 second, this interval can change according to transmission/receiving system.
From STT sign time zone identifier or this broadcast system time in time zone and the time difference between the standard time.According to above-mentioned example, can identify and resolve above-mentioned information by the time_zone_descriptor from be included in STT.
Extract the time zone identifier or, calculate the local zone time in the zone that broadcast system was positioned at, and handle broadcast message (S16) according to the time of being calculated in the time in the time zone that broadcast receiver system was positioned at and the time difference of standard time.
Reset and be used to receive by the time of the STT of broadcast transmission/receiving system definition if be used to receive the power supply of time, the broadcast receiver system of the channel variation that the user selects, then the step S12 (S18) that receives STT is returned in this processing.
Figure 33 illustrates from the view of broadcast singal reception according to the temporal information and the example of output current time in time zone.
Can receive the broadcast receiver system energized (S11) of mobile service data.
The user makes the request (S22) that is outputed to broadcast receiver system the time.
Extract the temporal information and the standard time (S24) in time zone from broadcast singal.For example, can from STT extract the time zone identifier or broadcast receiver system time in time zone and the time difference between the standard time.
Calculate the local zone time (S26) in the zone that broadcast receiver system is positioned at from the temporal information in the time zone of being extracted and standard time.
With the local zone time output (S28) of being calculated.Therefore, even when broadcast receiver system is mobile between the time zone, also can calculate and export the local zone time in time zone automatically.
Figure 34 illustrates from broadcast singal to receive the temporal information in time zone and export the view of the example of this broadcast message.Now, will be described in the example of output EPG in the broadcast message with reference to Figure 34.
Can receive the broadcast receiver system energized (S11) of mobile service data.
The user makes the request with the information output relevant with broadcast program, such as EPG (S32).
Obtain EIT from broadcast singal, and extract be included in EIT in the relevant broadcast message of program, such as programm name and the time started and the concluding time (S34) of program.
Obtain STT from broadcast singal, extract the standard time (UTC) and broadcast receiver system the time zone time and be included in time difference between standard time among the STT, and calculate the local zone time (S36) in the zone that broadcast receiver system is positioned at from the information of being extracted.With respect to Figure 32, S36 is described in detail to step.Step S34 and S36 can be realized simultaneously or be realized with the order with reversed in order shown in Figure 34.If broadcast receiver system has calculated local zone time in advance by the processing of Figure 32, then can omit step S36.
Use the local time information that is calculated, output is included in the programme information (S38) among the EPG.
Figure 35 is the view that the example of broadcast receiver system is shown.With reference to Figure 35, will the example of broadcast receiver system be described.The example of this broadcast receiver system comprises tuner 1100, demodulator 1200, demodulation multiplexer 1300, listing information decoding device 1400, controller 1500, decoder 1600, memory 1700 and output unit 1800.
When slave controller 1500 received the channel select command, demodulation multiplexer 1300 can output to decoder 1400 with the video/audio stream according to the video/audio PID of the channel of being selected by the user.
Can the decode listing information of demultiplexing and export decoded information to controller 1500 of listing information decoding device 1400.Can the decode listing information of mobile service data/main business data of listing information decoding device 1400.In this case, the listing information of the listing information of mobile service data and main business data can comprise the identifier separately that is used for the identification service data.For example, if the listing information of the listing information of mobile service data and main business data comprises PID separately, then can be according to the multiplexing bag separately of their PID.Alternatively, if the listing information of the listing information of mobile service data and main business data has identical PID, and have the identifier that is used for identification service, then identifier can be identified as independently form, and can be decoded.Listing information decoding device 1400 can be stored the listing information of mobile service data and the listing information of main business data independently.Listing information decoding device 1400 can be resolved the time that comprises time zone identifier or time zone and the listing information of the time difference between the standard time, and the information stores that will resolve is in controller 1500.The broadcast program information that listing information decoding device 1400 can be resolved such as EIT, and store the broadcast program information of having resolved.
Controller 1500 can receive user control signal by user interface.When the user sent control signal such as channel-changing, controller 1500 can pass through the reference channel map information, exports the signal of the channel of user expectation.Though stored the channel information of mobile service data and the channel information of main business data with the channel Mapping sheet form, controller 1500 can be according to the channel information of every kind of business, and the broadcast singal that control sends by each channel is to be output.That is to say, if be used to provide channel between the pseudo channel of main business and mobile service to be changed or be used to provide the channel between the pseudo channel of mobile service data to be changed, then controller 1500 can be controlled tuner 1100, demodulator 1200 and demodulation multiplexer 1300, makes the broadcast singal of channel be output.For example, if receive the channel-changing order, then controller 1500 can shine upon the channel of selecting by tuner 1100 changes by reference channel.Controller 1500 can controller demodulator 1200, makes signal by user's selective channel by demodulation.For example, if the user selects mobile receive channel, then controller 1500 can be controlled demodulator 1200, make that only the mobile service data in the burst part is by demodulation, in this burst part, the mobile service data of mobile receive channel be re-used (demodulation operation of demodulator can with reference to Figure 25).If the user selects fixedly receive channel, then controller 1500 can be controlled demodulator 1200, makes only main business data by demodulation.Controller 1500 can be controlled demodulation multiplexer 1300, make the bag of broadcast singal of the channel selected by the user according to the channel Mapping of being stored by demultiplexing.
Simultaneously, controller 1500 can be controlled the application or the user interface of the broadcast receiver system of Figure 35.Controller 1500 can be controlled tuner 1100 and listing information decoding device 1400, and come the channel of operation manager according to spectators' channel request by listing information updating and management channel mapping.Channel manager can use the listing information that newly receives to upgrade channel Mapping, and control demodulation multiplexer 1300 is with the PID of the video/audio stream of the desired channel of selection user.
Can use received listing information to export broadcast program information by the application that controller 1500 is carried out to the user.In this case, controller 1500 can be handled and broadcast message from the time correlation of listing information decoding device 1400 output according to local zone time, and the information that will handle is output as EPG.Alternatively, if controller 1500 from listing information decoding device 1400 receiving broadcasting informations, then can program receiving table information, this listing information is used the local zone time according to this Time Calculation.In this case, listing information decoding device 1400 will be applied to decoded listing information in advance by the local zone time that controller 1500 calculates, and this listing information of local zone time has been used in storage.For example, listing information decoding device 1400 can be resolved EIT, will begin such as listing/temporal information of concluding time converts the local time to, and stores this local zone time.When receiving the information that is used to export about broadcast program and content from the user, controller 1500 can become local signal with this information translation, and the broadcast program information stored of output.
Signal by demodulator 1200 demodulation can be an IP datagram.For example, with reference to Figure 25 to 26, the bag of the RS frame decoder of demodulator 1200 output can be the bag that comprises IP datagram.Alternatively, in the example of Figure 35, digit broadcasting system can receive the IP stream that comprises mobile service data by the network interface (not shown).In this case, controller 1500 operation IP managers make to send/to receive IP stream according to IP, and can be according to the source and destination transmission/reception IP stream of IP stream.Controller 1500 operation service managers make the business that is provided by IP stream that receives by the IP manager can be provided in real time, and Service Manager can be realized comprising the business of the video/audio that is received by IP stream.For example, Service Manager can be controlled the business that receives in real time by the IP agreement.For example, if Service Manager control real-time streaming data then can use RTP/RTP Control Protocol (RTP/RTCP) to control business datum.Except video/audio or comprise the time zone identifier or the STT of the time in this time zone and the time difference between the standard time, IP stream can comprise the listing information of describing mobile service data and main business data.If IP stream is decoded, then listing information is processed as described above.Simultaneously, controller 1500 can decode in receiving IP datagram data and with decoded storage in memory 1700.Controller 1500 can be carried out application, makes will to be stored in the data output in the memory 1700 or to offer the user.
Figure 36 is the flow chart that the example of receiving broadcast signal is shown.The example of receiving broadcast signal is described below with reference to Figure 36.
The user is with broadcast receiver system energized (S105).
The user selects physical channel or changes previous tuning physical channel (S110).Formed channel Mapping, if perhaps be pre-formed the channel Mapping that is included in the channel in the received signal, then this channel tuner is to the frequency (S120) of the channel of selecting according to this channel Mapping.Tuner can export the result of optimal tuning to controller, is used for the memory channel mapping.
Tuned broadcast singal is by demodulation (S130).Can not demodulation mobile service data if broadcast singal, then can only receive the broadcast receiver system of main business data by demodulation, that is to say, mobile service data can be abandoned as the sky bag.On the contrary, the broadcast receiver system that receives mobile service data comes this signal of demodulation according to the method that is used to modulate mobile service data.Detailed demodulation process can be with reference to the example of Figure 25.
From demodulated signal demultiplexing and resolve listing information (S140).For example, after receiving PAT and resolving, can resolve the PMT information of program.In the listing information of broadcast singal, present the listing information of mobile service data and the listing information of main business data independently.The listing information of the same type of main business data in this case ,/mobile service data can have different PID.Though the listing information of the same type of main business data/mobile service data comprises identical PID, can comprise the identifier that is used for identification service.If in step S140, resolve the listing information comprise the identifier that is used to identify main business/mobile service, then can manage the listing data of having resolved independently.In step S140, can demultiplexing and parsing comprises the time zone identifier or in the listing information of the time and the time difference between the standard time in this time zone.
From the listing information acquisition of having resolved information, and detect the pid information (S150) of the audio/video/data ES of this channel about channel.For example, receive and resolve VCT, the feasible information that can obtain about channel.In this case, VCT that is used for fixing receive channel and the VCT that is used for mobile receive channel can be resolved, and information can be obtained about channel.
To in step S150, store as channel Mapping by detected channel information, perhaps upgrade the channel Mapping of being stored.Determine according to the channel of selecting by the user receive such as the business of the audio/video/data ES of channel information in receiving system whether effectively (S160).If channel is invalid (among the step S160 for "No"), then for example can show " no channel " or " no signal " (S165) to the user according to the predetermined channel operation.In order to obtain the channel information of efficient channel, this processing can be returned step S140, the feasible new listing information (S167) that receives.
If the channel that the user selects is efficient channel (being "Yes" among the step S160), then select the PID (S170) of the audio/video/data stream of pseudo channel according to channel Mapping from output channel information.The channel of selecting according to channel Mapping according to spectators is fixedly receive channel or mobile receive channel, the demodulation process of controlled step S130.
If the main business that is used for fixing receive channel is provided, then the broadcast singal of this channel is proceeded tuning, demodulation multiplexing process, makes the main business data be output.On the contrary, if mobile service according to mobile receive channel is provided, this broadcast singal can be processed, makes the signal of burst part of the broadcast singal that only comprises the mobile receive channel of being selected by the user carry out channel tuner, the demodulation multiplexing process.When broadcast singal is output, can on screen, optionally show channel number or the channel information (S175) selected by OSD.
The broadcasting of the channel of being selected by the user is output (S180).The video/audio/data stream of the broadcast singal that sends by selected pseudo channel is decoded and be output.The user can check normal broadcasting and control broadcast reception by OSD.On the contrary, shown in Figure 32 to 34, when the user makes such as the temporal information of local time information or about such as the request of the information of the broadcast program of EPG the time, can use the time zone identifier of in step S140, resolving or in the time in this time zone and the time difference between the standard time, output user institute information requested.
When checking broadcasting, can change physical channel or pseudo channel (S190).If changed physical channel, execution in step S110 then is and if changed pseudo channel, then execution in step S170.Under main business data and mobile service data all can received situations, if between mobile receive channel, change channel, perhaps channel is changed to mobile receive channel from fixing receive channel, execution in step S170 then, make to comprise that the burst of the broadcast singal that changes channel is searched, and this broadcast singal of demodulation in this burst part only.On the contrary, if fixedly changing channel between the receive channel, perhaps channel is changed to fixedly receive channel from mobile receive channel, the data that then comprise the main business data division are by demodulation (if the main business data are included in the burst part, then can demodulation comprising the data of the main business data division of burst part).
If do not change channel, then can determine whether to have upgraded the version (S200) of channel information.If upgraded channel information, then upgrade information about channel Mapping, and execution in step S140, so that receive new listing information.If do not upgrade channel information, then can execution in step S180.
If when checking broadcasting, the user makes the request of output local zone time or output EPG information, then can export this time according to the processing of Figure 33 and 34.
According to the present invention, can provide digit broadcasting system and data processing method at channel-changing and noise stalwartness.In addition, be sent to receiving system, can improve the receiving ability of receiving system by the mobile service data of carrying out the additional code processing with respect to mobile service data and will encode.In addition, by given data is inserted in the presumptive area of data area, and send this data, can improve the receiving ability of receiving system by the agreement between reflector and the receiver.In addition, can send the listing information that is used for mobile service data and main business data.In addition, can come output time information and broadcast message based on changing according to the time of moving reception.
Pattern of the present invention
Being used for pattern of the present invention also is described in the embodiment part.
Industrial usability
The present invention has industrial application in digital broadcasting field and association area thereof.
Claims (17)
1. data processing method comprises:
Reception comprises the broadcast singal of listing information, and described listing information has the time zone identifier in the zone that broadcast receiver system is positioned at;
Resolve described listing information, and obtain described time zone identifier and described broadcast receiver system the local zone time in described zone and the time difference between the standard time; And
From described time zone identifier with in the described local zone time in described zone and the described time difference between the described standard time, obtain the described local zone time in the described zone that described broadcast receiver system is positioned at.
2. data processing method according to claim 1 further comprises based on the local zone time that is obtained and handles the broadcast message relevant with described local zone time.
3. data processing method according to claim 1, wherein, described listing information is system time table (STT).
4. data processing method according to claim 1, wherein, described listing information further comprises polarity information, described polarity information from the described time difference indicate the described local zone time of described time zone identifier be early than or be later than the described standard time.
5. data processing method according to claim 1, wherein, described listing information comprised according to the described local zone time of described time zone identifier and the time difference between the described standard time.
6. data processing method according to claim 1, wherein, the described local zone time in the described zone of described acquisition comprises: store a plurality of time zones identifier and with the corresponding a plurality of local zone times in time zone that identified by described a plurality of time zones identifier, and in a plurality of local zone times that obtain to be stored according to the time zone identifier that is obtained any one.
7. data processing method comprises:
The mobile service data and the listing information multiplexing with time zone identifier that will comprise broadcasted content are with output broadcasting stream; And
Modulate described broadcasting stream and export described modulated broadcasting stream.
8. data processing method according to claim 7 wherein, by being interweave described mobile service data and main business data of unit with the data set, obtains described broadcasting stream.
9. data processing method according to claim 7, wherein, described listing information is system time table (STT).
10. digit broadcasting system comprises:
Tuner, described tuner receive the broadcast singal that comprises the time zone identifier and export the channel of being selected by the user;
Demodulator, the mobile service data of described demodulator demodulation in the broadcast singal of being exported is to export demodulated broadcasting stream;
Demodulation multiplexer, described demodulation multiplexer demultiplexing is from the described broadcasting stream of described demodulator output;
Listing information decoding device, described listing information decoding device obtains described time zone identifier from the listing information that the broadcasting of demultiplexing is flowed;
Decoder, described decoder decode is by the described broadcasting stream of described demodulation multiplexer demultiplexing;
Display unit, described display unit show the broadcasted content that flows according to by the described broadcasting of described decoder decode; And
Controller, described controller use described time zone identifier to obtain local zone time and handle and the information relevant according to the described broadcasted content of described local zone time.
11. digit broadcasting system according to claim 10, wherein, described listing information is system time table (STT).
12. digit broadcasting system according to claim 10, wherein, described listing information further comprise the described local zone time of indication described time zone identifier be early than or be later than the polarity information of described standard time, and according to the described local zone time and time difference between the described standard time of described time zone identifier.
13. digit broadcasting system according to claim 10 further comprises memory, described memory stores a plurality of time zones identifier and with corresponding a plurality of local zone times in time zone by described a plurality of time zones identifier sign,
Wherein, described controller obtains to be stored in described a plurality of local zone times in the described memory any one according to the time zone identifier that is obtained.
14. digit broadcasting system according to claim 13, wherein, if described memory stores is by the described programme information of described listing information decoding device decoding, then described controller is controlled the programme information of being stored according to described local zone time and is changed and is stored.
15. digit broadcasting system according to claim 10 further comprises the interface that receives the control signal that is used to export broadcast program guide information from described user,
Wherein, described controller is controlled described broadcast program guide information according to described local zone time and is output to described display unit.
16. digit broadcasting system according to claim 10, wherein, if receive the described control signal that is used to export described local zone time from described user, then described controller outputs to described display unit with described local zone time.
17. a data processing method comprises:
Be included in digital broadcast receiving system time in time zone and the listing information of the time difference between the standard time with comprise that the mobile service data of broadcasted content is multiplexing, and output broadcasting stream;
The broadcast singal that the broadcasting stream that transmission is exported by modulation obtains;
Receive described broadcast singal;
Obtain described listing information from the described broadcast singal that receives, resolve described listing information, and obtain the described time difference; And
Obtain the local zone time in the zone in the described time zone that described broadcast receiver system is arranged in from the described time difference.
Applications Claiming Priority (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US91181207P | 2007-04-13 | 2007-04-13 | |
| KR1020070036234 | 2007-04-13 | ||
| US60/911,812 | 2007-04-13 | ||
| KR1020070036234A KR101351026B1 (en) | 2007-04-13 | 2007-04-13 | apparatus for transmitting and receiving a broadcast signal and method of transmitting and receiving a broadcast signal |
| US94798407P | 2007-07-04 | 2007-07-04 | |
| US60/947,984 | 2007-07-04 | ||
| PCT/KR2008/001975 WO2008127006A1 (en) | 2007-04-13 | 2008-04-08 | Digital broadcasting system and data processing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101682725A true CN101682725A (en) | 2010-03-24 |
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ID=41397466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200880018229A Pending CN101682725A (en) | 2007-04-13 | 2008-04-08 | Digital broadcasting system and data processing method |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN101682725A (en) |
| CA (1) | CA2683762C (en) |
| MX (1) | MX2009011085A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103986944A (en) * | 2014-06-05 | 2014-08-13 | 西安诺瓦电子科技有限公司 | Display terminal cluster broadcast control method, display terminal and display terminal cluster management end |
| CN105681833A (en) * | 2016-03-25 | 2016-06-15 | 天脉聚源(北京)传媒科技有限公司 | Method and device of adjusting EPG program broadcasting time |
| CN106031185A (en) * | 2014-02-28 | 2016-10-12 | 三菱电机株式会社 | Electronic program table generation apparatus and electronic program table generation method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113904960B (en) * | 2021-12-06 | 2022-03-15 | 上海金仕达软件科技有限公司 | Method, device, system and storage medium for measuring data transmission delay |
-
2008
- 2008-04-08 CA CA2683762A patent/CA2683762C/en not_active Expired - Fee Related
- 2008-04-08 MX MX2009011085A patent/MX2009011085A/en active IP Right Grant
- 2008-04-08 CN CN200880018229A patent/CN101682725A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106031185A (en) * | 2014-02-28 | 2016-10-12 | 三菱电机株式会社 | Electronic program table generation apparatus and electronic program table generation method |
| CN103986944A (en) * | 2014-06-05 | 2014-08-13 | 西安诺瓦电子科技有限公司 | Display terminal cluster broadcast control method, display terminal and display terminal cluster management end |
| CN103986944B (en) * | 2014-06-05 | 2017-10-17 | 西安诺瓦电子科技有限公司 | Display terminal cluster broadcast control method, display terminal and display terminal cluster management end |
| CN105681833A (en) * | 2016-03-25 | 2016-06-15 | 天脉聚源(北京)传媒科技有限公司 | Method and device of adjusting EPG program broadcasting time |
Also Published As
| Publication number | Publication date |
|---|---|
| MX2009011085A (en) | 2009-12-03 |
| CA2683762A1 (en) | 2008-10-23 |
| CA2683762C (en) | 2012-05-29 |
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Application publication date: 20100324 |