CN101944964B

CN101944964B - Method for processing traffic information and digital broadcast system

Info

Publication number: CN101944964B
Application number: CN2010102314113A
Authority: CN
Inventors: 金镇必; 金英仁; 洪昊泽; 催仁焕; 郭国渊; 李炯坤; 金昞吉; 金镇佑; 金锺汶; 宋沅奎
Original assignee: LG Electronics Inc
Current assignee: LG Electronics Inc
Priority date: 2005-10-17
Filing date: 2006-10-17
Publication date: 2012-10-31
Anticipated expiration: 2026-10-17
Also published as: CN101944964A

Abstract

The invention discloses a method for processing traffic information and a digital broadcast system. The method for processing traffic information data in a digital broadcast receiver comprises the following steps: receiving the traffic information data including traffic information message and system information; using prescient data to perform demodulation and channel equalization for the traffic information data; performing soft-decision decoding for the traffic information data after channel equalization; performing correction for the traffic information data after decoding; multiplexing the traffic information message and the system information from the traffic information data; using the system information to decode the traffic information message, thereby extracting the information related to at least one of the average speed and line advancing tie of traffic line, and the position information related to state information; and using the extracted information to provide traffic information service for users.

Description

Handle the method and the digit broadcasting system of transport information

The application is to be that October 17, application number in 2006 are 200610135601.9 the applying date, and denomination of invention is divided an application for the patent application of the method and the digit broadcasting system of transport information " handle ".

The application requires in the korean 10-2005-0097452 of submission on October 17th, 2005; The 10-2005-0132489 that submits on December 28th, 2005; The priority of 10-2006-0039117 that submits on April 29th, 2006 and the 10-2006-0089736 that submits on September 15th, 2006, it combines as a reference as describing fully at this.The application also requires in the priority of the International Patent Application PCT/KR2006/002068 of submission on May 30th, 2006, and it combines as a reference as describing fully at this.

Technical field

The present invention relates to digit broadcasting system, especially relate to digital broadcast transmission/receiving system and handle the traffic data method.

Background technology

At present, in the technology that is used for processing digital signal with very fast speed exploitation, and because a large amount of people uses the internet, digital appliances, computer and internet are integrated in together.Therefore, in order to satisfy user's various demands, need exploitation to add video/audio data so that send the system of various supplementarys through digital broadcasting (or TV) channel.

Some users it is contemplated that through the portable equipment that uses the PC card or have an attached simple domestic aerial and use auxiliary data broadcasting.Yet, when in indoor use since the obstruction that causes of wall or by near or the interference that causes of the mobile object that closes on, the intensity of this signal possibly reduce.Therefore, because the noise that ghost effect (ghost effect) and reflected wave cause, the performance of the digital signal of reception possibly worsened.Therefore, need the system of exploitation to ghost effect and the high anti-patience of noise (or robustness).Especially, for the auxiliary data of in portable or mobile broadcast receiver, using, need be to the high resistance patience (or robustness (robustness)) of signal interruption and noise.

Separating method sent through identical channel when this auxiliary data was passed through usually, like the MPEG video/audio data.Yet along with the appearance of digital broadcasting, the ATSC VSB digital television receiver that receives only the MPEG video/audio data is put on market.Therefore, the auxiliary data through same channel is sent like the MPEG video/audio data, should not influence the traditional ATSC vsb receiver that on market, provides.In other words, it is compatible that this can be defined as ATSC VSB, and this auxiliary data broadcast system should with ATSC VSB system compatible.At this, this auxiliary data can be called as enhancing data or EVSB data.And, because the quantity that has automobile (or car) is in continuous increase, and along with the influence (increase that it finally causes car to use) of policy on 5 day working day, therefore the needs of transport information are also increased.

Summary of the invention

Therefore, the present invention relates to the method for digital broadcast transmission/receiving system and deal with data, it has eliminated the one or more problems that cause owing to the restriction of prior art and shortcoming basically.

An object of the present invention is to provide the method for a kind of digit broadcasting system and deal with data, its can with ATSC VSB system compatible, it is applicable to and send strengthens data, and its tolerance noise and healthy and strong to noise.

Another object of the present invention provides the method for a kind of digital broadcast transmission/receiving system and deal with data, and it is through can receive and send transport information with traffic information data as strengthening data effectively.

Another object of the present invention provides the method for a kind of digital broadcast transmission/receiving system and deal with data, and it can strengthen the performance of receiving system through this traffic information data being carried out the data that extra coding and transmitted should be handled.

Another object of the present invention provides the method for a kind of digital broadcast transmission/receiving system and deal with data; It strengthens the receptivity of receiving system through multiplexed known data; It is corresponding to the data of knowing in advance according to the agreement between this transmitting system and the receiving system, and traffic information data.

To partly describe other advantages of the present invention, purpose and characteristic below, and based on following examination or through to practice understanding of the present invention, it is clearer that part advantage of the present invention, purpose and characteristic will become for a person skilled in the art.Especially the structure through going out in written description and claim and views can realize or obtain objects and advantages of the present invention.

In order to realize these purposes and other advantages; And according to the object of the invention; As carrying out the description of concrete and wide model, can comprise traffic information message generator, preprocessor, multiplexer, grid (trellis) encoder and transmitter according to the digital broadcast transmitter of the embodiment of the invention at this.

This traffic information message generator can produce comprise state information and with the traffic information message of this state information location information related, this state information comprises about at least one the information in the average speed of traffic route and the route traveling time.This preprocessor is through encoding this traffic information data and divide into groups to come preliminary treatment to comprise the traffic information data of traffic information message, this traffic information data divide into groups the to comprise traffic information data of coding and known data through producing traffic information data.This multiplexer can carry out multiplexed with one or more main audios and video (AV) packet this traffic information data grouping.This trellis encoder has at least one memory and grid coding is carried out in this multiplexed packet; When during corresponding to the beginning of known data sequence, coming this at least one memory of initialization through initialization data from the data of multiplexer output.Data transmission unit can be inserted into synchrodata in the data of grid coding, and modulation has the data of the grid coding of synchrodata, and sends the data of modulation.

In other aspects of the present invention, digital broadcast transmitter can comprise traffic information message generator, preprocessor, multiplexer, preprocessor, digital coding and interleave unit, trellis encoder and transmitter.

This traffic information message generator can produce comprise status message and with the traffic information message of this state information location information related, this state information comprises about at least one the information in the average speed of traffic route and the route traveling time.This preprocessor through this traffic information data of encoding to be used at least one of error correction and error detection and to comprise that through generation the traffic information data of this coding and the traffic information data of known data divide into groups to come preliminary treatment to comprise the traffic information data of this traffic information message.This multiplexer can divide into groups this traffic information data multiplexed with one or more main audios and video (AV) packet.This preprocessor comes these multiplexed data of reprocessing through only be coded in the traffic information data that comprises in these multiplexed data with the G/H code rate, and wherein G and H are positive integers, and G is less than H.This digital coding and interleave unit can be added first parity data in the data of reprocessing to, and interweave that this has the data of the reprocessing of first parity data.This trellis encoder can have at least one memory and these data that interweave are carried out grid coding; When during corresponding to the beginning of known data sequence, coming this at least one memory of initialization through initialization data from the data of digital coding and interleave unit output.This data transmission unit can be inserted into synchrodata in the data of grid coding, and modulation has the trellis-encoded data of synchrodata, and sends the data of modulation.

According to a further aspect in the invention, digital broadcast transmitter can comprise traffic information message generator, preprocessor, multiplexer, digital coding and interleave unit, preprocessor, trellis encoder and transmitter.

This traffic information message generator can produce comprise status message and with the traffic information message of this state information location information related, this state information comprises about at least one the information in the average speed of traffic route and the route traveling time.This preprocessor through this traffic information data of encoding to be used at least one of error correction and error detection and to comprise that through generation the traffic information data of coding and the traffic information data of known data divide into groups to come preliminary treatment to comprise the traffic information data of traffic information message.This multiplexer can divide into groups this traffic information data multiplexed with one or more main audios and video (AV) packet.This digital coding and interleave unit can be added first parity data in the multiplexed data to, and interweave and have the multiplexed data of this odd and even data.This preprocessor only is coded in the traffic information data that comprises in these data that interweave through the code rate with G/H and comes these data that interweave of reprocessing, and wherein G and H are positive integers, and G is less than H.This trellis encoder has at least one memory and the data of this reprocessing is carried out grid coding, when during corresponding to the beginning of given data sequence, coming initialization this at least one memory through initialization data from the data of this preprocessor output.This data transmission unit can be inserted into synchrodata in the data of grid coding, and modulation has the data of the grid coding of synchrodata, and sends the data of modulation.

In another aspect of this invention; The method of in digital transmitter, handling traffic data can comprise: produce comprise status message and with the traffic information message of this state information location information related, this state information comprises about at least one the information in the average speed of traffic route and the route traveling time; Produce the system message list of at least one this traffic information message that is used to decode; And multiplexed this traffic information message and this system message list.

In another invention of the present invention, digital broadcast transmitter can comprise traffic information message generator, system information generator and multiplexer.

This traffic information message generator can produce comprise state information and with the traffic information message of this state information location information related, this state information comprises about at least one the information in the average speed of traffic route and the route traveling time.This system information generator can produce the required system information of decoding traffic information message.This multiplexer can multiplexed this traffic information message and system information.

In another aspect of this invention; A kind of data structure can comprise the system information that decoding traffic information message is required; Said traffic information message comprises the traffic information message that contains state information; It comprises about at least one the information in the average speed of traffic route and the route traveling time; With with this state information location information related, this system information comprises the transport information table, this information table comprises at least one in transport information application identifier, Service Component (service component) identifier and the business information.

In another aspect of this invention; The method of in digital broadcasting transmitter, handling traffic information data can comprise: receive the traffic information data that comprises traffic information message and system information; This traffic information message of demultiplexing and this system information from this traffic information data; And utilize this traffic information message of this system information decoding; Extract thus state information and with this state information location information related, this state information comprises about at least one the information in the average speed of traffic route and the route traveling time.

In still another aspect of the invention, digital broadcasting transmitter can comprise demodulator, data demultiplexing and decoding unit, data storage and application manager.

But this demodulator demodulation comprises the traffic information data of traffic information message and system information, and this demodulated data is carried out error correction.This data demultiplexing and decoding unit can be from the data of this error correction demultiplexing traffic information message and system information, and utilize the traffic information message of this this demultiplexing of system information decoding.This data storage can be stored the traffic information message of this system information and decoding.This application manager can come to provide transport information professional to the user through the traffic information message of extracting state information utilization storage, this state information comprise about in the average speed of traffic route and the route traveling time at least one information and with this state information location information related.

Be to be understood that of the present invention above-mentioned general describe with following detailed description be schematically and illustrative, and be intended to desired the present invention further explanation be provided.

Description of drawings

The accompanying drawing that comprises provides further to be understood the present invention, and is combined and constitute the part of application, and it has illustrated embodiments of the invention also to be used for explaining principle of the present invention together with the description.In the accompanying drawing:

Fig. 1 has illustrated according to the transformat of transport information of the present invention;

The structure of the congested and traveling time information that Fig. 2 has illustrated in CTT event container (event container), to comprise;

Average speed on the link (link) that Fig. 3 A to 3C has illustrated to comprise in the state component (component) of CTT event container of Fig. 2, be used for the traveling time of link and be used for the grammer of chocking-up degree;

Fig. 4 A to 4C has illustrated the structure of state component of the average speed on the relays link;

Fig. 5 A to 5E has illustrated to be used for the message structure of the traveling time of link;

Fig. 6 has illustrated according to the block diagram of the universal architecture of the digital broadcast transmitting system of the embodiment of the invention;

Fig. 7 has illustrated according to the syntactic structure of the transport information descriptor of the embodiment of the invention;

Fig. 8 has illustrated to comprise the table example of the transport information descriptor of Fig. 7;

Fig. 9 has illustrated according to the syntactic structure of the virtual channel table of the embodiment of the invention, in this virtual channel table, has comprised the transport information descriptor of Fig. 7;

Figure 10 has illustrated to show the block diagram according to the structure of the digital broadcast transmitting system of first embodiment of the invention;

Figure 11 has illustrated to show the example of detailed diagram of the E-VBS preprocessor of Figure 10;

Figure 12 A and Figure 12 B have illustrated respectively before the data deinterlacing device of Figure 10 and afterwards data structure;

Figure 13 has illustrated to show the block diagram according to the digital broadcasting transmission system structure of second embodiment of the invention;

Figure 14 has illustrated to show the detailed diagram example of the E-VBS preprocessor of Figure 13;

Figure 15 has illustrated to show the detailed diagram example of the E-VBS preprocessor of Figure 13;

Figure 16 has illustrated to show the block diagram according to the structure of the digital broadcast transmitting system of third embodiment of the invention;

Figure 17 has illustrated according to the block diagram of the digital broadcast receiving system of the embodiment of the invention;

Figure 18 has illustrated according to the treatment step of embodiment of the invention receiving traffic information data;

Figure 19 has illustrated according to the detailed view of the demodulator of Figure 17 of first embodiment of the invention;

Figure 20 has illustrated according to the detailed view of the demodulator of Figure 17 of second embodiment of the invention.

Embodiment

Now will be in detail with reference to the preferred embodiments of the present invention, its example signal is in the accompanying drawings.Whatsoever under the situation, identical reference number is used to represent identical or similar part in whole accompanying drawing.In addition, although from usually known and the term that uses, select the term that uses among the present invention, some terms that the applicant has selected the present invention to mention in describing through his or her judgement, its detailed meaning is described in the relevant portion of specification.And, need understand the present invention through the inherent meaning of term rather than the term that uses through reality simply are literal.

In the present invention, known data are meant the data of knowing in advance according to the agreement between transmitting system and the receiving system.Master data is meant one group of data through the receiving system reception of routine.Known data and master data comprise video data and/or voice data.And, in the present invention, strengthen data and can represent to comprise information, like the data of program execute file, stock information, transport information etc.Strengthen data and can comprise video data and/or voice data.These enhancing data can comprise transport information, be used to provide data service data, be used for ground (land) ripple broadcasting as PSI and/or PSIP system information, be used for wired broadcasting system information like band external system information (OOB-SI), be used to provide different Java languages or auxiliary data, voice data and the video data of html language setting of the data service of wide range of application.These enhancing data also can comprise the various metadata that the various Control Software that are used to control this receiver and XML language are provided with, for example for various information are provided to the user.

In description of the invention, traffic information data will be applied to this enhancing data, so that send and receive.Provide business to can be applicable to various standards for digital broadcasting according to road searching service of the present invention and transport information.The prominent example of standards for digital broadcasting be based on european digital audio broadcast (DAB) DVB-continental rise (DVB-T) professional, that provide in Europe of Eureka-147 [ETSIEN 300 401] professional, also be only professional and DMB (DMB) business that provide in Korea S of forward link (FLO) of DVB-hand-held (DVB-H) that provide in Europe medium professional, that provide in the U.S..The DMB business of Korea S is categorized as digital multimedia broadcast (dmb) via satellite (S-DMB) business based on the continental rise DMB (T-DMB) of Eureka-147 and use satellite communication.

At this, this transport information comprises the information about public transportation, obstruction and/or traveling time, road traffic, emergency and situation etc.This transport information also comprises and the relevant information of type that comprises all means of transportation such as train, steamer (or naval vessel), aircraft.And this transport information also can comprise the information about the factor that can influence traffic, such as travel information, parking facility information, Weather information, environmental pollution information or the like.Especially, although provide stop up and/or traveling time (below be called " CTT ") information as example of the present invention, also can use any other information type at this.And as long as this term specific function, the term that the present invention uses is not only limited to these that in the explanation statement, use.

Term " traffic behavior " expression road congestion state (that is, stream mode), however it is not limited to above-mentioned road congestion state, and can be applied to similar paradigm if desired.Understand the present invention for convenience and better, represent to stop up and/or carry out temporal information (CTT) state with term " traffic behavior ".Above-mentioned CTT state comprises CTT state information and CTT status predication information, additional information etc.At this, the particular range of term " section " or " link (link) " expression road.Yet it is not limited to the above-mentioned meaning, and can be applicable to other similar implications, if necessary.

Provide according to of the present invention transport information professional with at least a form in text, voice, figure, rest image and the animation to the user through receiver, this receiver only has one of the electronic chart that is installed on wherein and GPS or one and does not also have.This traffic information data is through the traffic information message configuration of cells and sends.Especially, this traffic information message is the minimum unit that is used to send this transport information.At this, the information of using about single transport information is included in the traffic information message.In the present invention, for the sake of simplicity, term " transport protocol expert group (Transport Protocol Expert Group, TPEG) " is used on the transport information.And, as stated, as long as this term specific function, the term that uses in the present invention just be not limited in the explanation statement employed these.

Transport information is used corresponding to the highest level in the ISO/OSI protocol stack.Each transport information is used and is assigned unique identification number, and it is known as application identities (AID).Each open and when generating new application, distribute new application identities.For example, each obstruction and/or traveling time (CTT) information, road traffic message (RTM), public transportation information (PTI) etc. are the transport information application of given unique application identities.This traffic information data is corresponding to comprising the streamed of various traffic information message.At this, this traffic information message is used corresponding at least one.

Fig. 1 has illustrated two transport information that in a stream, comprise to use the example of (for example, CTT and RTM).

This traffic information message generator (not shown) that produces traffic information message can be the broadcasting station.Description the present invention for the sake of simplicity, this traffic information message generator is known as transport information provides server.The traffic jam information that this traffic information message generator is collected from each provenance (for example, operator input, or the information that from other servers or detector automobile, receives through network) with the traffic information message unit structure.

In this point, each traffic information message has identical container configuration, and it can be known as transport information (or TPEG) message container.This CTT message container described here is corresponding to one in the traffic information message container.Especially, the CTT message container according to this CTT message of transmission of the present invention comprises CTT management container 102, CTT status container 104 and TPEG position container 106.

Above-mentioned CTT management container 102 comprises message identifier information and date and time information, and uses this message identifier information and date and time information as the management of information information that receives through this receiving system.Necessary message id information comprises message identifier (MID) and version number (VER) for this message.In this case, this message id (MID) is represented the identifier of the single message relevant with the independent state of Service Component.This MID according to the present invention progressively increases predetermined number " 1 " since 0 with this MID number at every turn.If this MID value arrives maximum " 655535 ", then this maximum " 65535 " is initialized to 0.This version number (VER) expression is used to identify the sequence number of the continuous meassage with single message id.Version number of the present invention can be confirmed as in 0 to 255 any one, and should be noted that this version number order in 0 to 255 scope increases.

This CTT status container 104 can comprise the obstruction and the traveling time of the link (being the highway section) of obstruction and/or traveling time state and prediction.This CTT status container 104 can comprise average link speed, link traveling time, link delay or obstruction type etc.

This TPEG position container 106 can use all places reference method.For example, can use the position reference method of utilizing coordinate system, or utilize the position reference method of the link that guarantees in advance.When using coordinate system, for its starting point and this coordinate (latitude and longitude) in final position that produces the link of CTT message is sent out.When using the reference method of utilizing the link that guarantees in advance, but the unique identification of particular link on the sending and receiving devices.For example, receiving equipment can comprise the local storage networking of link, and wherein each link can be discerned by unique identifier.Link can be illustrated in the highway section that begins and stop and do not have the crosspoint in the crosspoint therebetween.This coordinate system can be the WGS84 pattern.Can send the title of the text formatting of link.

In various enforcements, CTT status container and TPEG position container are made up of one or more CTT assemblies.CTT status container 104 can be made up of an assembly or a plurality of CTT assembly.In various enforcements, comprise that the CTT assembly of the ID of 80h (the symbol h meaning is a hexadecimal) or 84h comprises one or more state component, it comprises basic transport information, like average link speed, link traveling time, link delay or obstruction type.In this explanation, specific ID is described to distribute to the structure relevant with customizing messages.(for example, actual value 80h) is exemplary to the ID of this distribution, and different enforcement can be particular association (association) or the different value of environment distribution.

In various enforcements, comprise that the CTT assembly of the ID of 81h comprises one or more state component, it comprises the CTT state of prediction.The CTT state of this prediction can comprise the average link speed of prediction, the link traveling time or the obstruction acceleration trend of prediction.This obstruction acceleration trend can comprise the information of the tendency of representing blocked state.Owing to can predict blocked state in the near future from it, thereby this obstruction acceleration trend will be described to a kind of information of forecasting of blocked state.

In various enforcements, this CTT message can comprise the CTT assembly of the extraneous information that is configured to transmit transport information.Identifier 8Ah can distribute to the CTT assembly that carries extraneous information, and can comprise in this CTT assembly that expression is used for the language codes of the language of this extraneous information.

Fig. 2 illustrated according to various execution modes, belongs to the grammer of structure of obstruction and the traveling time information assembly (below be called the CTT assembly) of CTT event container (for example, the reference number 22 of Fig. 2).This Fig. 2 CTT assembly has the ID 3a of ' 0x80 ', comprises each state component 3c of m, and has the field of representing with byte 3b, and this field representes to be included in the length of the whole data of state component wherein.

State component can for example be used 8 bits to come form with Fig. 3 A to 3C signal to transmit average speed on the link, be used for the traveling time of link and/or about the information of chocking-up degree.In an enforcement, ID ' 00 ' is distributed to the average speed on the link; ID ' 01 ' is distributed to the traveling time of link; With ID ' 03 ' is distributed to chocking-up degree.

Average speed for link; (that is, the numerical value of unit representation 1.8km/h) can be carried on (size of ' intunti ' expression byte) in the field 41 with for example 0.5m/s; Like minute numerical value of expression, can be carried on the field 42 of the traveling time that is used for link with unit.Can (for example pass through from the link information of framework server 100; Linkage length, link width etc.) obtain linkage length in the database; And this linkage length is obtained the information about the traveling time of link divided by the average speed on the respective link that from the transport information of various resource acquisitions, obtains; After further being rounded to a minute unit (for example, traveling time was rounded to 1 minute above 30 seconds), this temporal information is provided.

In an enforcement, if send the average speed on the link with the unit of 0.5m/s (1.8km/h), the admissible velocity interval of representing with 8 bits can add up to 0～459km/h.Owing to there is no need average speed (for example is expressed as very high value; Surpass 200km/h); Thereby preferably consider very high speed (for example, average speed is higher than 200km/h) be cause by speeding driver in respective link rather than under current traffic condition.Therefore, the viewpoint from the traffic jam information that provides provides and representes that very high-speed information is otiose.

On the other hand, under the situation of traffic jam, even the difference of 1km/h also is the key factor that the driver selects particular course on average speed.In this respect, the resolution of 1.8km/h can not be distinguished the 1km/h difference in the average speed.Therefore, when the average speed step-down of link, (this mean velocity information of=1.8km/h) unit representation possibly can't satisfy the needs of driver to resolution with 0.5m/s.

Equally, if be provided for the traveling time of link with minute unit, when the length of link more in short-term, it is big that rounding error possibly become.For example, if linkage length is 500 meters, and the average speed on this link be 20m/s (=72km/h), the traveling time that is used for link will become 25 seconds; If the length of link is 1000 meters, and the average speed of link is 20m/s, and the traveling time that is used for this link will become 50 seconds; As other examples, if linkage length is 2900 meters, and the average speed on this link is 20m/s, and the traveling time that is used for this link will be 145 seconds.In these cases, the traveling time that is used for this link that sends state component to corresponds to 0,1 and 2 minute respectively; Therefore, the difference between actual traveling time and the traveling time that provided by transport information adds up to 25,10 and 25 seconds.In the short link of length, it is more outstanding that these errors will become.

Therefore, in various enforcements,, can introduce lower maximal rate, to improve the resolution in low speed chain circuit for the transmission of the information of average speed on the relevant link.Equally, for the transmission of relevant link traveling time information, can allow with the second is the information of unit representation.Is the information of the link traveling time of unit representation for transmitting relevant with the second, can use 8 bits to represent; Yet also can distribute other bits is the information of unit representation to transmit with the second.

Shown in Fig. 4 A, in an enforcement, can use down column format be used to transmit the information of the average speed on the relevant link: 0.25m/s (=0.9km/h).Through using this speed unit, the denotable maximal rate of 8 bit fields of expression average speed 51 becomes 229.5km/h.

0.25m/s unit be an example arbitrarily; Therefore,, can use lower unit, for example 0.2m/s (maximum permission speed that is used to represent is 183.6km/h) or 0.15m/s (maximum permission speed that is used to represent is 137.7km/h) in order to be increased in the velocity resolution in the slow speed link.Limit maximal rate for traffic regulations (for example, 110km/h) situation is favourable through reducing this speed unit resolution that gathers way.

Shown in Fig. 4 B, can be that unit provides the average speed on the link with 1km/h.According to this embodiment, but the represented allowed band of field of expression average speed 52 becomes 0～255km/h, and the numeral below the decimal point can not occur.Although compare with the example of Fig. 3 A, (459km/h → 255km/h), velocity resolution have improved 0.8km/h (1.8km/h → 1km/h) to allow the maximal rate of expression to reduce among the embodiment among Fig. 4 B.

Based on the size of average speed on the current link, this velocity resolution can the important effect of gas.As previously mentioned, when the average speed on the link is low, the slight variation of the response average speed that the driver can be responsive, and if the average speed on link when high, the driver is revealed lower sensitiveness for the slight change list of average speed.Therefore, in various execution modes, can use the speed unit of variation according to the size of average speed.Fig. 4 C has illustrated the example of the structure of the average speed field of state component according to an embodiment of the invention.Highest significant position (F) command speed unit representes average speed based on this unit by remaining 7 bits (Speed_Value).For example, if highest significant position (F) is 0, it is hinting by residue 7 bits (Speed_Value) value of carrying corresponding to being the average speed of unit representation with 0.5km/h; When highest significant position (F) when being 1, the value of being carried by residue 7 bits (Speed_Value) is corresponding to being the average speed of unit representation with 1km/h.

In the embodiment of Fig. 4 C and since with 0.5km/h be the maximal rate of unit representation be 63.5km/h (=127*0.5km/h), (F) is 1 when highest significant position, average speed add up to value that residue 7 bits represent with 63.5km/h's and.For high-speed value, the integer value that can add 63km/h replaces 63.5km/h.For example, if average speed field is 1: 0001100, the average speed that transmit will be 759.5km/h (=12km/h+63.5km/h) or 759km/h (=12km/h+63km/h).

In the embodiment of Fig. 4 C, indicating the velocity resolution with two different 0.5km/h of unit and 1km/h only is an example; Can use different resolution according to specific unit.Therefore, although the velocity resolution that uses different with described in the disclosure depend on that the variable resolution of the size of the average speed on the link should be considered to fall in the said scope.

Transmission is shown among Fig. 5 A to 5D about the embodiment of the form of the information of the traveling time of link.

In the embodiment of Fig. 5 A, the 5 higher bits in 8 bits are preserved for minute, and 3 lower bits 61 be preserved for second.Because but the allowed band that can represent of 3 lower bits is from 0 to 7, these lower 3 bits, 61 records are from ten times value of the element that shows with stopwatch of the traveling time of link.That is to say, from three examples that the front is described, because the traveling time of link is 25,50 and 145 seconds (2 minutes 25 seconds again), lower 3 bits, 61 records, 3 (being rounded off second), 5 (corresponding to 50) and 3 (corresponding to 30) corresponding to 30--5; 5 higher bits write down 0,0 and 2 respectively.In this embodiment, error becomes 5,0 and 5 seconds and the relative error amplitude is reduced to 20% (=5/25) separately, and 0% (0/10) and 20% (5/25), compare with minute situation of expression, on average be reduced to 13.3%.

In the embodiment of Fig. 5 B, be used for the chronomere that 8 bits represent and become with need.Especially, 7 lower bits be retained come with minute or second be the traveling time of unit representation link; Highest significant position 62 as indicate in this 7 bit content recorded whether be with minute or second be the mark (flag) that unit is measured.When this content with minute when expression, 0 is assigned with, and when content was shown with stopwatch, 1 was assigned with.Because according to 3 former examples; The traveling time of link is 25,50 and 145 seconds; In 8 bits, write down 10011001 (mark=1) respectively, 10110010 (mark=1) and 00000010 (mark=0) (=2 minutes) or 11111111 (mark=1) (=127 seconds).In the present embodiment, error becomes 0,0 and 25 second (or 18 seconds) separately, and the relative error amplitude is 0%, 0% and 100% (or 72%), and compares with minute situation of expression, on average is reduced to 33.3% (or 24%).

In the embodiment of Fig. 5 C, whole 8 bits all are used to write down the traveling time of link, and this record unit is less than 60 seconds and greater than 1 second (for example, 10 seconds).Because according to three former examples, the traveling time of link is 25,50 and 145 seconds, according to the execution mode of Fig. 5 C, in 8 bits, writes down 3 (being rounded off in 5 seconds), 5,15.In this embodiment, error becomes 5,0 and 5 seconds separately, and the relative error amplitude is 20%, 0% and 20%, compares with minute situation of expression, on average is reduced to 13.3%.Although this execution mode has shown the result identical with the execution mode of Fig. 5, being used to of being allowed representes that the maximum time of the traveling time of link is 2550 seconds (4 minutes 30 seconds again), thus greater than 31 minutes in Fig. 5 A execution mode 50 seconds again.

Can distribute other bits through the mechanism shown in Fig. 5 D.Fig. 5 D is the execution mode that has wherein added 1 bit labeling of express time unit.

In the execution mode of Fig. 5 D; Whole 8 bits are preserved for the traveling time of link; And outer 1 bit labeling 63 of allocation (for example, when this chronomere corresponding to minute the time, this mark is set to 0; It is set to 1 and when this chronomere is second), with specify time of writing down in 8 bits whether with minute or second describe.Because according to three former examples, the traveling time of link is 25,50 and 145 seconds, according to the execution mode of Fig. 5 D, 1: 8 bit (mark: data) have 1: 00011001,1: 00110010 and 1: 10010001.In this embodiment, the error of every kind of situation becomes 0, and compares with minute situation of expression, and error rate reduces by 100%.

When 1 other bit is not carried at a kind of mode such in 7 bits of other formations and constitutes 8 bits with effective information, simple and clear for Message Processing will waste this 7 bit.Therefore; When effective information is not included in 7 bits of formation and sends state component (ID 0X01) thus to; Shown in Fig. 5 E, the traveling time rather than only extra transmission 1 bit labeling that transmit link through 16 bits are useful (' intunli ' expression 16 bits sizes among Fig. 5 E).The traveling time 64 of the link that whole 16 bits are represented fully to show with stopwatch in the execution mode of Fig. 5 E.In the execution mode of Fig. 5 E, wherein whole 16 bits all are used to represent the traveling time of link, and the maximum permission time became 18 hours 12 minutes 16 seconds again.For, this expression capacity can hold the link traveling time that is used for intimate all links and not have error.

In the execution mode of Fig. 5 A to 5C, wherein represent the traveling time of link with 8 bits, and only represent that with 8 bits the traveling time of link compares minute to be unit, it has the characteristic of improvement.Yet; Execution mode for Fig. 5 A and 5C; Because being used for the maximum of every kind of situation, to allow the time be respectively 31 minutes 50 seconds and 42 minutes but also 30 seconds not only; The obstruction if the part of link becomes, and traveling time is elongated thus, transmits the situation of failure with taking place owing to the traveling time that can not represent link causes information.For the execution mode of Fig. 5 B, the problem of existence is to surpass 127 seconds for the traveling time of link, taken place with minute be the identical mistake of situation of the traveling time of unit transmission link.When bigger scope of needs and more accurate scope, use Fig. 5 C-5E scheme especially favourable.

Above-mentioned traffic information data need be than ordinary audio and/or video data, i.e. master data, more stable receptivity.Under the situation of master data, the minor error that user's eyes and ear can't be noticed is not a problem.On the contrary, under the situation of traffic information data, even the error of 1 bit size also can cause serious problem.Therefore, handle this traffic information data through extra cataloged procedure, then with it with master data is carried out multiplexed and transmission.Therefore,,, robustness is provided, therefore these data is resisted strongly and be in constantly and the channel environment under the great variety always like the CTT data to this traffic information data.In this point, need system information, so that from channel, extract this traffic information data, this traffic information data sends through this channel, and the traffic information data of decoding and being extracted then.In some cases, this system information also is known as business information.This system information can comprise channel information, event information etc.

In a preferred embodiment of the invention, program specific information/program and system information protocol (PSI/PSIP) are applied as system information.Yet, the example that the present invention provides in being not restricted to describe herein.Especially, if this system information corresponding to the agreement of sending with sheet form, then can be applicable to the present invention no matter the title of this system information.This PSI is defined the MPEG-2 system standard be used to classify channel and program.And PSIP has the channel that can be classified and Advanced Television Systems Committee (ATSC) standard of program.

At this, this PSI can comprise Program Association Table (PAT), the access list of having ready conditions (CAT), Program Map Table (PMT) and network information table (NIT).Especially, this PAT is corresponding to the specific information that can be sent by the grouping with group character (PID) ' 0 '.This PAT sends the corresponding pid information of this PMT that is used for each program and the corresponding pid information of NIT.This CAT sends the information of the payable broadcasts system that is used by transmitting terminal.This PMT sends the pid information of transmission stream packets, and program identification number and the bit sequence that separates are sent in it like the video data and the voice data of configuration respective program.This PMT also sends pid information, and this PCR information is sent in it.This NIT sends the information of actual transmissions network.

On the other hand; This PISP can comprise virtual channel table (VCT), system time table (STT), classification (rating) region list (RRT), expanded text table (ETT), directly channel change table (DCCT), direct channel change are selected code table (DCCSCT), Event Information Table (EIT) and main lead schedule (MGT).This VCT sends the information about virtual channel, as is used to select the channel information and the group character (PID) that is used to receive voice data and/or video data of this channel.Especially, through analyzing VCT, with the PID of broadcast program corresponding audio data of sending and video data and channel name, channel etc. through channel.This STT sends about current weather and the information of time, and this RRT sends the zone of classification and the information of review committee.This EIT sends the information (for example, programm name, program start time etc.) about the incident of virtual channel.This DCCT/DCCSCT sends with automatic channel and changes relevant information, and this MGT is sent in the version and the pid information of each table among this PSIP.

Each table in above-mentioned PSI/PSIP comprises the elementary cell that is called " section (section) ", and at least one or a plurality of section are combined to form table.For example, this VCT can be divided into 256 sections.At this, a plurality of channel informations of single section portability.Yet, will not be divided into two or more sections about the information of this virtual channel.In description of the invention, provide example traffic information message and the table relevant with system information is multiplexed and transmission.

Fig. 6 has illustrated to show the block diagram according to the universal architecture of the digital broadcasting transmission system of the embodiment of the invention, and wherein traffic information message is with the indumentum relevant with this system information multiplexed and send.With reference to figure 6, this transmitting system comprises first multiplexer 311, the PSI/PSIP generator 312 and second multiplexer 313.Especially, for example, this transmitting system can be corresponding to the broadcasting station.In other words, MPTS (TS) grouped element of this traffic information message with 188 bytes is input in first multiplexer 311.At this, this traffic information message comprises the transport information application (for example, CTT uses) that will be sent out.

This TS divides into groups partly to be made up of header portion and pay(useful) load.At this, information and sign and the partly group character (PID) of corresponding data division of pay(useful) load that this header is called the score and comprised the beginning of representing data.And this pay(useful) load partly comprises the traffic information message that will be sent out.In this, the PID in this header portion can be corresponding to being the identifier that strengthens the traffic information message in the data with the Data Identification that is partly carried by pay(useful) load, perhaps corresponding to the identifier that can identify these enhancing data.Can identify under the situation of this traffic information message at the PID of this header, can from this TS divides into groups, extract this traffic information message.On the other hand, can identify and to strengthen under the data conditions, receive all and be identified as the TS grouping that strengthens data at the PID of this header.After this, from the enhancing extracting data traffic information message of this reception.In addition, the TS that carries this traffic information message divides into groups can be corresponding to elementary stream (PES) type of packetizing or corresponding to section type (section type).In other words, can PES type traffic information message be set to the TS grouping, perhaps can the section type traffic information message be set to the TS grouping.

The present invention will describe the example of the traffic information message of sending as section type.In an embodiment of the present invention, this traffic information message is included in digital storage media-order and control (DSM-CC) section, and this DSM-CC section is set to 188 byte-sized TS packets.At this, the identifier that disposes the TS grouping of this DSM-CC section is included in the data service table (DST).When sending this DST table, ' 0x95 ' is assigned to the stream_type field value in the professional location descriptor of PMT or VCT.Especially, in this receiving system, when the stream_type of PMT or VCT field value equaled ' 0x95 ', this was illustrated in and receives the data broadcasting (that is, strengthening data) that comprises traffic information data.In this point, this traffic information data can pass through data carousel (carousel) method and send.At this, this data carousel method is meant and periodically repeats to send identical data.

Simultaneously, this PSI/PSIP generator 312 example that is system information generators.Can be at least one among PMT, PAT, CAT and the NIT through the table that this PSI produces.Can be at least one among VCT, STT, RRT, ETT, DCCT, DCCST, EIT and the MGT through the table that this PSIP produces.The table that is produced by this PSI/PSIP generator 312 comprises system information, this traffic information message so that this receiving system can be analyzed and decode.In this point, this receiving system is only used the table among this PSI, perhaps only uses the table among this PSIP, and the combination of perhaps showing among PSI and the PSIP is so that analyze and this traffic information message of decoding.At least the VCT of PAT and PMT and this PSIP that needs this PSI is to analyze and this traffic information message of decoding.For example, this PAT can comprise the system information of sending this traffic information message and corresponding to the PID (perhaps program code) of this PMT of this traffic information message.This PMT can comprise the PID of the TS grouping of sending this traffic information message.This VCT can comprise the PID and this traffic information message of the TS grouping of sending this virtual channel information, and this virtual channel sends this traffic information message.

And, the present invention includes the supplementary relevant with this transport information, this supplementary is specifically represented to use the information that is comprised with concrete which information of expression under this transport information.This supplementary relevant with this transport information comprises Service Component identification information, application identification information, business information etc.This business information can comprise Business Name, business description, traffic flag (logo), user profile, free text message, help information etc.And, in the particular table of this PSI/PSIP, can comprise this supplementary with descriptor format or with field format.

For description of the invention is become concisely, the descriptor that comprises this supplementary relevant with this transport information is called the transport information descriptor, this supplementary is included in the particular table of PSI/PSIP.At this, this transport information descriptor can be called the TPEG traffic descriptor.As stated, term ' transport information descriptor ' is an easy to understand example of the present invention.Therefore, any other term that has with this transport information descriptor identical function also can use at this.And in description of the invention, the particular table that will comprise this transport information descriptor is defined as transport information provides table.And, will comprise that the particular table of this transport information descriptor is defined as system information (SI) table, comprising this transport information descriptor.

Fig. 7 has illustrated according to the syntactic structure of the transport information descriptor of the embodiment of the invention.With reference to figure 7, this TPEG traffic descriptor can comprise Descriptor_tag field, Descriptor_length field, Number_of_TPEG_Service_Components field and ' for ' cycle repeats statement.At this, this Number_of_TPEG_Service_Components field list is shown in the quantity of the Service Component that comprises in this TPEG traffic descriptor (or transport information descriptor).And, will be somebody's turn to do ' for ' cycle repeats statement and repeat the as many number of times of value with this Number_of_TPEG_Service_Components field.This repeat statement can comprise Service_Component_ID field, Application_ID field and business information field.

Especially, this Descriptor_tag field is 8 bit fields, the value of its given this TPEG traffic descriptor of ability unique identification.In example of the present invention, value 0xAC is given as the mark value of TPEG traffic descriptor.Yet this is just for understanding the example that the present invention provides easily.Depend on the design of this system designer, can be to the untapped mark value of these other kinds of Descriptor_tag field.This Descriptor_tag field is 8 bit fields, and it representes the length from this Descriptor_tag field to the end of this field with byte unit.

This Service_Component_ID (SCID) field also is 8 bit fields, its expression can unique identification the value of Service Component in should business.This SCID field can be confirmed by service supplier.At this, single Service Component corresponds essentially to the single channel in the TPEG stream.This Application_ID field is 16 bit fields, the value of its each application of expression ability unique identification.Especially, unique application identifier (AID) is distributed to each business information use, and, all distribute new AID whenever the new application of exploitation (or generation).

Business information field in this repeat statement can comprise Service_name field, Service_description field, Service_logo field, Subscriber_information field, Free_text_information field and Help_information field.The length of each field in this business information field is variable and representes with at least a form in text sequence, numeral and the figure.This Service_name field is represented professional title, and it allows the User Recognition specific transactions.For example, when sending broadcast program, can comprise that Business Name is such as ' TPEG of the A of broadcaster is professional '.This Service_description field is represented the detailed description of corresponding service.This field is used for the more detailed description business tine.For example, can comprise concurrent lose one's life by name " the suburb public transportation information of southern urban area " and business.This Service_logo field is represented traffic flag, so that allow visual recognition business or service supplier.This traffic flag is sent with form or any other picture format of bitmap usually.

This Subscriber_information field is represented user profile.For example, can comprise and send the information and the paying information of the customer charge of conditional such as being used for (or limited) Service Component.This Free_text_information field representes to send to user's extraneous information.For example, can comprise and send the information of service disconnection (or time-out), the cancellation of customizing messages etc.In addition, this Help_information field is represented the help information of user's ability reference.For example, can comprise and send such as information such as IP address, telephone numbers.

Order, position and the implication of each field that Fig. 7 shows only are easy to understand examples of the present invention.And, because those skilled in the art can fully revise order, position and the implication of each field, and the numbering of the field of distributing in addition, therefore the invention is not restricted to example described here.And in the given example of the present invention, the transport information descriptor that Fig. 7 shows is included at least one of VCT of PMT and PSIP of PSI, and is sent out then.

Especially, in description of the invention, the example of the PMT of Using P SI and the VCT of PSIP provides table as transport information.This expression supplementary relevant with this transport information can be sent through the PMT and/or the VCT of this descriptor or field.Equally, when describing the supplementary relevant with this transport information with field format, obviously, these fields can be applicable to during among the VCT of PMT and PSIP of PSI at least one show.At this, comprise that PMT and/or the process of VCT in this transport information descriptor can be compulsory or optional.And, no matter force or optional this PMT and/or the VCT of comprising, also be one embodiment of the present of invention.Therefore, this example is not limited to scope of the present invention and essence.

Fig. 8 has illustrated to comprise the example of table of the transport information descriptor of Fig. 7.Especially, Fig. 8 has shown the main descriptor type that in this PSI/PSIP table, uses, distributed to the descriptor flag value of each descriptor and has utilized at least one the example of PSI/PSIP table in the foregoing description symbol.With reference to figure 8, the professional location descriptor that is expressed as ' S ' must be present among the VCT always.Especially, this business location descriptor is carried the audio frequency PID and the video PID of this broadcast program.And in corresponding service, each descriptor must be included in the table that is expressed as ' M ' (that is, force), and can comprise or be not included in the table that is expressed as ' O ' (that is, optional).

For example, 0x81 is as the descriptor flag value for the AC-3 audio descriptor value of being given, and must represent that its use is in PMT and EIT.And, as this descriptor flag value, and be designated as ' forcing (M) ' at PMT and VCT subscript according to this TPEG traffic descriptor value of being given 0xAC of the embodiment of the invention.Above-mentioned example only is used to simplify description of the invention.This TPEG traffic descriptor also can be designated as ' forcing (M) ' or ' optional (O) ' by at least one subscript in PMT and VCT.The given value OxAC as TPEG traffic descriptor mark value also just is convenient to understand an example of the present invention.Therefore, depend on the design of this system designer, can distribute other not mark value of usefulness at this.

Fig. 9 has illustrated according to the syntactic structure of the virtual channel table of the embodiment of the invention (VCT), comprising this business information descriptor of Fig. 7.At this, those of this syntactic structure and its implication and specific-use section (private section) are corresponding.Through comprising that in table_id field, section_syntax_indicator field, private_indicator field, section_length field, transport_stream_id field, version_number field, current_next_indicator field, section_number field, last_section_number field, protocol_version field and the num_channels_in_section field at least one is provided with the VCT grammer of Fig. 9.

This VCT also comprises first ' for ' cycle repeats statement, and it repeats and the as many number of times of num_channels_in_section field value.This first repeat statement can comprise at least one of short_name field, major_channel_number field, minor_channel_number field, modulation_mode field, carrier_frequency field, channel_TSID field, program_number field, ETM_location field, access_controlled field, hidden field and service_type field, source_id field, descriptor_length field neutralization second " for " Do statement, and this second " for " Do statement repeats the as many number of times of quantity with the descriptor that in first repeat statement, comprises.At this,, this second repeat statement is called the circulation of first descriptor in order to simplify.This descriptor decriptors () that in this first descriptor circulation, comprises is applied to each virtual channel respectively.

In addition, this VCT grammer also comprises additonal_descriptor_length field and the 3rd " for " Do statement, and it repeats to give with extra interpolation the as many number of times of quantity of the descriptor of VCT.In order to simplify description of the invention, repeat statement with the 3rd and be called the circulation of second descriptor.All virtual channels that this descriptor additonal_descriptors () that in this second descriptor circulation, comprises is applied in this VCT, describe usually.

As stated, with reference to figure 7, this table_id field representes to identify the unique identifier (or sign) that just sending to as the information of the table of VCT (ID).Especially, this table_id field representes to inform that the table corresponding to this section is the value of VCT.For example, can be with the 0xC8 value to this table_id field.

This version_number field is represented the version number of this VCT.This section_number field is represented the numbering of this section.This last_section_number field is represented the numbering of the last section of complete VCT.And this num_channels_in_section field specifies in the whole virtual channel that exists in this VCT section.And in first ' for ' cycle repeats statement, this short_name field is represented the title of virtual channel.This major_channel_number field is represented ' master ' channel relevant with this virtual channel that in this first repeat statement, defines, and the minor_channel_number field is represented ' inferior ' channel.Especially, each channel should be connected with time channel with the dominant frequency Taoist monastic name, and, this dominant frequency Taoist monastic name and time channel are used as the user's reference number for corresponding virtual channel.

According to the present invention, number of virtual channel is distributed to this traffic information message, and can send this traffic information message through the virtual channel of this distribution.In this situation, the short_name field is represented the title of this virtual channel, sends this traffic information message through this channel.The major_channel_number/minor_channel_number field representes to send through it this number of virtual channel of this traffic information message.Show this program_number field being used to connect the MPEG-2 Program Association Table (PAT) that has wherein definition and this virtual channel of Program Map Table (PMT), and the program number of this program_number fields match in this PAT/PMT.At this, this PAT describes the element corresponding to the program of each program number, and this pat table shows the PID of the transmission grouping of sending this PMT.This PMT describes the PID tabulation that supplementary and this transmission are divided into groups, divides into groups through this transmission, and program identification number and independent bit sequence, as the video and/or audio data that this program is set are sent out.

This source_id field is represented the program source that is connected with this respective virtual channel.At this, ' source ' is meant particular source, like video image, data or sound.The value of this source_id field is corresponding to the unique value in this MPTS, and this MPTS sends this VCT.In example according to the present invention, the transport information descriptor of describing the supplementary relevant with this transport information (that is, supplementary) relevant with this CTT is included in the circulation of first descriptor.As above described in the description of this VCT, obviously any one those skilled in the art can be with the example application that provides among the present invention in other tables.

According to the present invention, exist two kinds of diverse ways definition to comprise the PID of the VCT of this transport information descriptor.At this, the PID of this VCT is used for identification (or differentiation) this VCT and the required packet identifier (PID) of other tables.In first method, can be set to depend on MGT according to the PID of VCT of the present invention.In this case, this receiving system can not this PSIP of Direct Recognition (or verification) or a plurality of tables of PSI.Therefore, can only after the PID of inspection, read this VCT again by this MGT definition.At this, this MGT is the table of the PID, size, version number etc. of a plurality of tables of definition.In second method, can be set to have basic pid value (that is, fixing pid value) according to the PID of VCT of the present invention, it is independent of this MGT.Different with first method, this second method more helps discerning VCT, and each PID that needn't this MGT of verification.Obviously, should before transmitting system and receiving system, reach agreement about this basic PID.

As stated, should produce the PAT that describes these system informations and the supplementary relevant, PMT, VCT, MGT, DCCT etc. through this PSI/PSIP generator 312 with this transport information.At this, this PMT is provided for first multiplexer 311, and the residue table except PMT (that is, PAT, VCT, MGT, DCCT etc.) is provided for second multiplexer 313.First multiplexer 311 is multiplexed as the grouping of 188 byte MPTSs (TS) with this traffic information message and this PMT; This traffic information message comprises that this transport information that will send (for example uses; The CTT application) message in, this PMT produces through this PSI/PSIP generator 312.After this, this multiplexed message and table output to second multiplexer 313.This second multiplexer 313 is multiplexed into the grouping of 188 byte MPTSs (TS) with the output of this first multiplexer 311 with the table of exporting from this PSI/PSIP generator 312.Subsequently, this multiplexed message is given by output with mark and is used for additional code.

In description of the invention, propose, this PMT is provided and the example of residue table is provided to this second multiplexer 313 to first multiplexer 311.Yet, also can design the present invention through having a single multiplexer with first multiplexer 311 and second multiplexer 313 are integrated.This traffic information data that is used for additional code of exporting from this multiplexer of Fig. 6 comprises wherein multiplexed traffic information message and the PSI/PSIP table relevant with this traffic information message.And at least one in the above-mentioned table (for example, PMT, VCT) can comprise transport information descriptor shown in Figure 7.

After this, will describe the coding and the process of transmitting of this traffic information data in detail with the 3rd embodiment according to of the present invention first, second.Through this traffic information data is carried out the additional code process, can like the CTT data, robustness be provided to this traffic information data.Therefore, these data can be rapidly and suitably response is fast and the channel environment of frequent variations.

First embodiment

Figure 10 has illustrated according to the structured flowchart of the digital broadcasting transmission system of first embodiment of the invention.With reference to Figure 10, this digital broadcasting transmission system comprises E-VSB preprocessor 401, packet multiplexer 402, data randomizer 403, RS encoder 404, data interleaver 405, backward-compatible processor 406, trellis encoder 407, frame multiplexer 408, pilot tone inserter 409, VSB modulator 410 and RF upconverter (up-converter) 411.At this, shown in figure 11, this E-VSB preprocessor 401 comprises E-VSB randomizer 421, RS frame encoder 422, E-VSB piece processor 423, group formatter 424, data deinterlacing device 425 and packet formatter 426.

In having the digital broadcast transmitting system of said structure, master data is input in this packet multiplexer 402.On the other hand, traffic information data is input to E-VSB preprocessor 401, it carries out the additional code process, so that this traffic information data can be responded rapidly with the robustness to noise and channel change.The E-VSB randomizer 421 of this E-VSB preprocessor 401 receives these traffic information datas, thus the data of this reception of randomization and should randomized data export to this RS frame encoder 422.At this, because this this traffic information data of E-VSB randomizer 421 randomizations, randomisation process that again can 403 pairs of transport information of omitted data randomizer in the process of back.

This RS frame encoder 422 receives this randomized traffic information data, and the data that receive are carried out at least one in error correction coding processing and the error detection coding processing.Therefore, through to this traffic information data robustness being provided, these data can be disperseed owing to frequency environment changes the crowd's mistake (group error) that causes.Therefore, these data can respond non-constant and the easy frequency environment that changes suitably.This RS frame multiplexer 422 comprises that also mixing each with behavior unit all has the process of being scheduled to big or small many groups traffic information data.Traffic information data through to input is carried out the error correction coding process, and this RS frame encoder 422 adds the required data of error correction, carries out the error detection coding process then, adds the required data of error detection process thus.

This error correction coding is used this RS coding method, and this error detection coding uses the Cyclic Redundancy Check coding method.When carrying out this RS cataloged procedure, produce the required parity data of error correction.When carrying out this CRC cataloged procedure, produce the required CRC data of error detection.Especially, this RS frame encoder 422 is discerned this traffic information data through predetermined length unit (A).Then, with the traffic information data marshalling of a plurality of (A) long measure, so that form (or formation) RS frame.After this, the RS frame of new formation is carried out the RS cataloged procedure at least one direction of line direction and column direction again.In the present invention, predetermined length unit (A) is corresponding to 187 bytes.

If the traffic information data of input divides into groups corresponding to 188 byte unit mpeg transport streams (TS), then remove a MPEG sync byte, divide into groups so that form 187 byte unit.At this, remove this MPEG sync byte, identical value because all traffic information datas divide into groups to be given.Also can during the randomisation process of this E-VSB randomizer 421, remove this MPEG sync byte.In this case, omit the process of this MPEG sync byte of removal of carrying out by this RS frame encoder 422.Especially, if the traffic information data of input does not comprise the removed fixed byte of ability,, then distinguish the traffic information data of this input through this 187 byte unit if perhaps the length of the grouping of this input is not 187 bytes.After this, the traffic information data of a plurality of 187 byte unit is organized into groups, so that form (or formation) RS frame.After this, the RS frame of new formation is carried out the RS cataloged procedure at least one direction of line direction and column direction again.

Channel state based between sending and receiving possibly comprise mistake in this RS frame.When mistake took place, these CRC data (or CRC sign indicating number or CRC check with) can be used for checking whether mistake is present in every capable unit.For produce (or generate) this CRC check with, the traffic information data of 422 pairs of RS codings of this RS frame encoder is carried out the CRC coding.The CRC check that produces by this CRC cataloged procedure with can be used for notice when sending this traffic information data through channel whether owing to mistake is damaged.In the present invention, can use the error detection coding method that is different from the CRC coding method.Substitute,, can use error correction/encoding method in order to strengthen the whole error correcting capability of this receiving terminal.

As stated, this traffic information data group with RC coding and CRC coding outputs in the E-VSB piece processor 423.(wherein G and H are integers to this E-VSB piece processor 423, and the traffic information data that G＜H) this RS of code rate coding encodes and CRC encodes, and then the data of this G/H rate coding are exported to group formatter 424 with G/H.For example, if 1 bit input data are encoded as 2 bits and output, so G equals 1 and H equals 2 (that is, G=1 and H=2).Substitute, if 1 bit input data are encoded as 4 bits and output, G equals 1 and H equals 4 (that is, G=1 and H=4) then.

In description of the invention, provided the example of traffic information data, or carried out the example of cataloged procedure with 1/4 code rate (being also referred to as 1/4 rate coding process) with 1/2 code rate (being also referred to as 1/2 rate coding process) execution cataloged procedure.Especially, under the situation of the 1/2 rate coding process of execution, these E-VSB piece processor 423 reception 1 bits and 1 bits of encoded that will receive are 2 bits (that is 1 code elements).Then, 2 bits (or 1 code element) of these E-VSB piece processor 423 output processing.On the other hand, under the situation of the 1/4 rate coding process of execution, these E-VSB piece processor 423 reception 1 bits and 1 bits of encoded that will receive are 4 bits (that is 2 code elements).Then, 4 bits (or 2 code elements) of these E-VSB piece processor 423 output processing.In this point, under the situation of this 1/4 rate coding process of execution, can repeat 2 times with 1/2 code rate symbols encoded, so that export 2 code elements, perhaps import data and can encode 2 times, so that export 2 code elements with 1/2 code rate.

Compare with 1/2 rate coding process, because high code rate, this 1/4 rate coding process can provide more powerful error correcting capability.For this reason, in the process of back, will organize formatter 424 by this and be assigned to the position (or place) that channel can influence performance with 1/4 code rate coded data.On the other hand, will carry out coded data with 1/2 code rate and distribute to position with better performance.Therefore, can reduce the difference of performance.Above-mentioned 1/2 code rate and 1/4 code rate only are the exemplary embodiments that proposes during the present invention describes, and can change this code rate based on the selection of the number of times of code symbols or repetition.

This group formatter 424 will be inserted into the respective regions of the data set that forms according to pre-defined rule from the traffic information data of these E-VSB piece processor 423 outputs.And this group formatter 424 is inserted into all places identifier relevant with data interlacing (place holder) or known data set in the respective regions in the data set.In this point, can this data set be described through at least one delamination area.And,, can also change and distribute to each regional data byte based on the characteristic of each delamination area.

Figure 12 A has illustrated the data structure of the data set before the data deinterlacing process, and Figure 12 B has illustrated the data structure of the data set after the data deinterlacing process.Figure 12 A has illustrated the example of the packet in the data structure before the data deinterlacing, and this packet is divided into three layer regions: head zone, body region and tail region.Therefore, at the data set that is used for the data deinterlacing process of input, data at first are input to head zone, are input to body region then, and are input to tail region at last.Three above-mentioned zones only are easy to understand demonstrations of the present invention.Based on the design of this system designer, can be the zone of smallest number more with this region description, or the zone of bigger quantity.And the data that are inserted in each zone can change.Therefore, the invention is not restricted to example in this proposition.

As stated, head, main body and afterbody have been provided, to simplify description of the invention as example.Therefore, in the example shown in Figure 12 A, data set is set to have head, main body and tail region, so that this body region is defined as the zone of not mixing with the main-data area of data set.This data component is a plurality of zones, so that the use that each zone can be different.Especially, compare with the zone that disturbed by master data, the zone that not disturbed by master data has the receptivity of high anti-patience.And, when using to the data set insertion and transmitting the system of given data, and when in the enhancing data, periodically inserting long and continuous given data group, can the given data of predetermined length periodically be inserted in the body region.Yet, because this master data can be mixed with head and tail region, periodically insert very difficulty of this given data, and insert long also difficult with continuous given data group.

Suppose that with a plurality of delamination area of this data component dispensing shown in Figure 12 A, above-mentioned E-VSB piece processor 423 can will be inserted into the data in each zone with the different coding rate coding according to the characteristic of each delamination area.In example of the present invention, receiving system is used different coding speed based on the zone, supposes that wherein performance possibly change after the channel information that utilization can be used for channel equalisation is carried out equilibrium treatment.

For example, this traffic information data that will be inserted in the body region through this 423 pairs of E-VSB piece processor carries out 1/2 rate coding, and is inserted in the body region through the traffic information data of this group formatter 424 with this 1/2 rate coding.This traffic information data that will be inserted in head or the tail region through this 423 pairs of E-VSB piece processor in addition, carries out 1/4 rate coding.At this, to compare with 1/2 rate coding, this 1/4 rate coding provides bigger error-correcting performance.After this, be inserted in head and the tail region through the traffic information data of this group formatter 424 this 1/4 rate coding.Substitute, the traffic information data that be inserted in head and the tail region can be encoded with the code rate that more effective error-correcting performance is provided by this E-VSB piece processor 423.Subsequently, the traffic information data that will so encode through this E-VSB piece processor 423 is inserted in head and the tail region, perhaps this coded data is stored in to be used for other purposes in the reserved area.

Shown in Figure 12 A; Except this traffic information data of coding from this E-VSB piece processor 423 and output, this group formatter 424 also inserts the MPEG header placeholder relevant with data deinterlacing, nonsystematic RS odd even placeholder and master data placeholder.With reference to figure 12A, because based on the input of this data deinterlacing device, this traffic information data is blended in head and the tail region with this master data replaces, thereby distributes this master data position.Carrying out in the dateout of data deinterlacing, the placeholder that will be used for this MPEG header is assigned to the beginning of each grouping.

This group formatter 424 will be inserted into corresponding zone by the given data that preordering method produces, and perhaps the known data location identifier will be inserted in the corresponding zone, so that in the processing of back, insert given data.The placeholder that in addition, will be used for this trellis encoder 407 of initialization is inserted into respective regions.For example, can insert this initialization data placeholder at the front end of given data sequence.The output of this group formatter 424 is imported into this data interleaver 425.Data in 425 pairs of data sets of this data deinterlacing device and carry out the inverse process of data interleaver from placeholder of these group formatter 424 outputs.And this data deinterlacing device 425 is to the data of these packet formatter 426 these deinterleavings of output then.Especially, when carrying out deinterleaving through 425 pairs of data deinterlacing devices data and the placeholder in the data set shown in Figure 12 A, the data set of exporting to packet formatter 426 has the structure (or configuration) shown in Figure 12 B.

In the data of deinterleaving and output, this packet formatter 426 is removed and has been divided this master data placeholder and the RS odd even placeholder that is used in the deinterleaving process.Then, the remainder that this packet formatter 426 will be imported data is organized into groups, and this remaining data is inserted in the 4 byte MPEG header placeholders in the MPEG header.In addition, when inserting this known data location identifier through this group formatter 424, this packet formatter 426 can be inserted into given data in this known data location identifier.Substitute, can directly export this known data location identifier, and have no the change of the displacement insertion that is used for the back process.

After this, the data during the formative as stated data set of this packet formatter 426 divides into groups are set to 188 byte unit traffic information datas and divide into groups.Then, this packet formatter 426 provides 188 byte unit traffic information datas of setting to divide into groups to this packet multiplexer 402.This packet multiplexer 402 divides into groups to 188 byte traffic information datas according to predetermined multichannel multiplexing method and carries out multiplexed from the master data packet of these packet formatter 426 outputs.Then, data randomizer 403 is exported in this is multiplexed grouping.Can or revise this multichannel multiplexing method according to the change of the various factors in the system design.

In the multichannel multiplexing method of packet multiplexer 402, distinguish (or identification) traffic information data burst (burst) section and master data section along time shaft, so latter two section is set to repeat replace.In this point, in traffic information data is burst section, can send at least one data set, and in the master data section, have only master data to send.In this traffic information data is burst section, also can send this master data.When in the above-mentioned segment structure of bursting, sending this traffic information data, the digital broadcast receiving system that receives only this traffic information data is energized during the data burst section only.Substitute, in only sending the master data section of master data, deenergization during the master data section prevents to receive master data thus.Therefore, can reduce or prevent the transition power consumption of digital broadcast receiving system.As stated, this packet multiplexer 402 receives these master data packet and from this data sets of this packet formatter 426 outputs, and sends the grouping that receives with burst structure.

When the data of input during corresponding to this master data packet, this data randomizer 403 is carried out the randomisation process identical with conventional randomizer.Especially, abandon (or deletion) MPEG sync byte in this master data packet.Then, through using the pseudorandom byte that from this data randomizer 403, produces with remaining 187 byte randomizations.Subsequently, should export to this RS encoder 404 by randomized data byte.

Yet; When the data of input are divided into groups corresponding to this traffic information data; MPEG sync byte in 4 bytes in be inserted into this traffic information data grouping through this data packet format device 426 is dropped (or deletion), and only remaining 3 bytes are by randomization.The remainder of the traffic information data except this MPEG header portion is by randomization, and directly outputs in this RS encoder 404.This is because this traffic information data has been carried out randomisation process through this E-VSB randomizer 421.404 pairs of this RS encoders carry out RS through these data randomizer 403 randomized data or bypass through the data of this data randomizer 403 and encode.Then, this RS encoder 404 adds 20 byte RS parity checks to this coded data, and this has added the data of RS parity check to these data interleaver 405 outputs thus.

At this point, if the data of input to should master data packet, the data of 404 pairs of inputs of this RS encoder are carried out the consistent system RS encoding process with conventional ATSC VSB system, the end in this 187 byte data adds 20 byte parity thus.Substitute,, in this packet, confirm each position of 20 parity bytes if the data of input are divided into groups corresponding to traffic information data.After this, be respectively inserted into through 20 bytes of carrying out this RS parity check that nonsystematic RS coding obtains and confirm in the parity byte position.This data interleaver 405 receives the data with parity check of adding through RS encoder 404, and the data of this reception that interweaves.After this, this data interleaver 405 is to this backward-compatible processor 406 and these trellis encoder 407 these data that interweave of output.At this, this data interleaver 405 is corresponding to the byte unit convolutional deinterleaver.

Simultaneously, the memory in this trellis encoder 407 should at first be initialised, so that allow the dateout of this trellis encoder 407 to become the given data based on the regulation of the agreement between the Receiver And Transmitter.Especially, before the given data sequence of importing was by grid coding, the memory of this trellis encoder 407 should at first be initialised.In this point, the beginning of this given data sequence of input is corresponding to the initialization data placeholder that is inserted by this group formatter 424, rather than actual given data.Therefore, need replace the process of the initialization data placeholder of respective wire grid encoder memory in the process of the generation initialization data right before the grid coding of the given data sequence of importing with the new initialization data that produces.This is the backward compatibility of guaranteeing with conventional receiving system.

Based on the current state of the memory in this trellis encoder 407 and the init state of hope, confirm to produce these grid initialize memory data of replacing this initialization data placeholder.In addition because the initialization data of replacement, need to calculate respective data packet the RS parity check process and use from the process of the new RS parity check of calculating of RS parity check replacement of this data interleaver 405 outputs.Therefore, this backward-compatible processor 406 receives this traffic information data that comprises this initialization data placeholder and divides into groups, and this initialization data placeholder is used to replace with the initialization data from this data interleaver.

Subsequently, these backward-compatible processor 406 receptions are from the initialization data of this trellis encoder 407.Then, this backward-compatible processor 406 calculates new nonsystematic RS parity check, and to the new nonsystematic RS parity check of calculating of these trellis encoder 407 outputs.After this, this trellis encoder 405 selects the output of this data interleaver 405 as the data in this traffic information data grouping, and this traffic information data grouping comprises the initialization data placeholder that will be replaced.This trellis encoder 405 is also selected the output of this backward-compatible processor 406.Therefore, this trellis encoder 405 is carried out grid coding through symbol unit to the output of selecting.Especially, 407 pairs of initialization datas of this trellis encoder carry out grid coding, replace this initialization data placeholder that in the traffic information data of having imported, comprises.

Simultaneously; When this master data packet of input; Perhaps when this traffic information data of input divides into groups; Wherein this traffic information data grouping does not comprise the initialization data placeholder that will be replaced, and this trellis encoder 407 is selected to carry out grid coding through symbol unit thus from the data and the RS parity check of these data interleaver 405 outputs.Then, the data through these trellis encoder 407 grid codings are input to this frame multiplexer 408.This frame multiplexer 408 inserts field and segment sync in the output of this trellis encoder 407, and exports the data of handling to this pilot tone inserter 409.This pilot tone inserter 409 adds pilot signal to the output symbol sequence of this frame multiplexer 408.This sequence of symhols that has added pilot tone is modulated to the 8VSB signal of intermediate frequency band, converts the RF band signal then into, passes through antenna transmission thus.

Simultaneously, be used for the assembly of this E-VSB preprocessor 401 and the embodiment shown in Figure 11 of module position and be only used for concisely describing example of the present invention.According to a second embodiment of the present invention, this E-VSB preprocessor 401 comprises RS frame encoder, E-VSB randomizer, E-VSB piece processor, group formatter, data interleaver and packet formatter.Difference between second embodiment and the E-VSB preprocessor shown in Figure 11 is the sequence of positions of RS frame multiplexer and E-VSB randomizer.Especially, in the second embodiment of the present invention, at first this traffic information data is carried out RS frame coding, carry out data randomization process then.Except that this details, the remaining structure of second embodiment is consistent with the embodiment among Figure 11.Therefore, for the sake of simplicity, omit the detailed description of identical content.

In the third embodiment of the present invention, this E-VSB preprocessor 401 comprises RS frame encoder, E-VSB randomizer, group formatter, E-VSB piece processor, data interleaver and packet formatter.Difference between the 3rd embodiment and the E-VSB preprocessor shown in Figure 11 is the sequence of positions of RS frame multiplexer and E-VSB randomizer, and the sequence of positions of group formatter and E-VSB piece processor.Especially, in E-VSB preprocessor, at first this traffic information data is carried out RS frame coding, carry out data randomization and byte expansion then and handle according to third embodiment of the invention.After this, to the format of the traffic information data execution group in proper order of byte expansion, E-VSB piece handle, data randomization and packet-formatted processing procedure.

In this case,, before the group formatter, need to carry out byte expansion and handle,, the group formatter is operated and no problem so that corresponding to the encoding process of this E-VSB piece processor because the group formatter is positioned at before the E-VSB piece processor.Therefore, this E-VSB randomizer is this traffic information data of randomization not only, and carries out byte expansion through inserting empty data bit.And this E-VSB piece processor is only carried out a kind of in 1/2 rate coding process and the 1/4 rate coding process to the valid data of the transport information of byte expansion, and these valid data are corresponding to the data bit with actual information.As stated, this E-VSB preprocessor 401 of this traffic information data execution additional code being handled can be applicable in the whole bag of tricks.Therefore, the invention is not restricted to the example that in describing explanation, provides.

Second embodiment

Figure 13 has illustrated according to the structured flowchart of the digital broadcasting transmission system of second embodiment of the invention.With reference to Figure 13, this digital broadcasting transmission system comprises E-VSB preprocessor 501, packet multiplexer 502, data randomizer 503, E-VSB preprocessor 504, RS encoder 505, data interleaver 506, backward-compatible processor 507, trellis encoder 508, frame multiplexer 509, pilot tone inserter 510, VSB modulator 511 and RF upconverter 512.At this, shown in figure 14, this E-VSB preprocessor 501 comprises RS frame encoder 521, E-VSB randomizer 522, group formatter 523, data deinterlacing device 524 and packet formatter 525.And shown in figure 15, this E-VSB preprocessor 504 comprises RS parity check position identifier inserter 531, data interleaver 532, E-VSB piece processor 533, data deinterlacing device 534 and RS parity check position identifier remover 535.

In digital broadcast transmitting system, master data is input in this packet multiplexer 502 with said structure according to second embodiment of the invention.On the other hand, this traffic information data is input to E-VSB preprocessor 501, it carries out additional code process, so that make this traffic information data can be so that the robustness of noise and channel change is responded rapidly.

The RS frame encoder 521 of this E-VSB preprocessor 501 receives this randomized traffic information data, and the data that receive are carried out at least one in error correction coding processing and the error detection coding processing.Therefore, through to this traffic information data robustness being provided, these data can be disperseed owing to frequency environment changes the crowd's mistake that causes.Therefore, these data can respond non-constant and the easy frequency environment that changes suitably.This RS frame multiplexer 521 comprises that also mixing each with behavior unit all has the process of being scheduled to big or small many groups traffic information data.This error correction coding is used the RS coding method, and error detection coding uses this Cyclic Redundancy Check coding method.When carrying out this RS cataloged procedure, generation is used for the required parity data of error correction.When carrying out this CRC cataloged procedure, generation is used for the required CRC data of error detection.

In this RS frame encoder 521, produce the process of RS frame production process, consistent with the process of the RS frame that produces being carried out error correction coding and error detection coding and the RS frame encoder 422 shown in Figure 11.Therefore, in order to simplify, the detailed description of identical content is omitted.Traffic information data by these RS frame encoder 521 codings is imported in E-VSB randomizer/byte expansion device 522.The traffic information data of this E-VSB randomizer/byte expansion device 522 received codes, and to its execution data randomization and byte expansion processing.

In this, because this E-VSB randomizer/byte expansion device 522 has been carried out randomization to this traffic information data, in order to simplify, what can be omitted in the rear end passes through data randomizer 503 with the randomized process of this transport information.And, can change the order of carrying out data randomisation process and byte expansion process.Especially, this byte expansion process can be carried out after the data randomisation process.Substitute, this data randomisation process can be carried out after the byte expansion process.Can consider whole system and its this order of structure choice.

Be based on the code rate of the E-VSB piece processor 533 in this E-VSB preprocessor 504, this byte expansion can be different.Especially, when the code rate of E-VSB piece processor 533 was G/H, (wherein G and H were integers to this byte expansion device, and G＜H) to the H byte with the G byte expansion.For example, to be expanded be 2 data bytes if code rate is 1/2,1 data byte.Substitute, to be expanded be 4 data bytes if this code rate is 1/4,1 data byte.Then, the traffic information data of output is imported in the group formatter 523 from this E-VSB randomizer/byte expansion device 522.The operation of the group formatter 523 in this E-VSB preprocessor 501, data deinterlacing device 524 and packet formatter 525 is identical with packet formatter 426 with group formatter 424, data deinterlacing device 425 in this E-VSB preprocessor 401 shown in Figure 10.Therefore, for the sake of simplicity, the detailed description of identical content is omitted.

These E-VSB preprocessor 501 pretreated traffic information datas are imported in the packet multiplexer 502, so that carry out multiplexed with master data packet.Carried out the data randomization from these packet multiplexer 502 outputs and multiplexed data by this data randomizer 503, be input to then in this E-VSB preprocessor 504.At this, the operation of this data multiplexer 502 and data randomizer 503 is with shown in Figure 10 identical, and therefore, for the sake of simplicity, the detailed description of identical content is omitted.After this, will describe this E-VSB preprocessor 504 in detail.

Especially, be transfused to RS parity check position identifier inserter 531 through these data randomizer 503 randomized data or the bypass data through this data randomizer 503 to this E-VSB preprocessor 504.When the data of this input during corresponding to 187 byte master data packet; This RS parity check position identifier inserter 531 inserts 20 byte RS parity check position identifiers in the back of this 187 byte data, export the data of these processing to this data interleaver 532 thus.Substitute, when the data of this input are divided into groups corresponding to 187 byte traffic information datas, this RS parity check position identifier inserter 531 inserts 20 byte RS parity check position identifiers in this packet, so that carry out nonsystematic RS encoding process in the rear end.After this, in the remainder of 187 bytes, the position byte is inserted in this traffic information data grouping, outputs it to this then and states interleaver 532.

The data interleaving treatment is carried out in the output of 532 pairs of these RS parity check position identifier inserters 531 of this data interleaver, then the data of handling is exported to this E-VSB piece processor 533.533 pairs of valid data from the traffic information data of data interleaver 532 outputs of this E-VSB piece processor are carried out additional code and are handled.For example; If between data bit, inserting VB vacancy bit through this E-VSB randomizer/byte expansion device 522 is 2 bytes with 1 byte expansion; 533 of this E-VSB piece processors are exported the data of this processing then to effectively stating bit 1/2 rate coding in the code element that is provided with VB vacancy bit and valid data bit.On the other hand; If between data bit, inserting VB vacancy bit through this E-VSB randomizer/byte expansion device 522 is 4 bytes with 1 byte expansion; 533 of this E-VSB piece processors are exported the data of this processing then to effectively stating bit 1/4 rate coding in the code element that is provided with 3 VB vacancy bits and 1 valid data bit.

Master data or the direct bypass of this RS parity check position identifier are through this E-VSB randomizer/byte expansion device 522.And given data and initialization data placeholder directly bypass pass through this E-VSB randomizer/byte expansion device 522.Under the situation of known data location identifier, the given data that from this E-VSB piece processor 533, produces can replace this known data location identifier and export.From this E-VSB piece processor 533 be encoded, the data of replacement and bypass are input to this data deinterlacing device 534.This data deinterlacing device 534 is carried out the inverse process of this data interleaver 532, thus these input data is carried out this data deinterlacing process, outputs it to this RS parity check position identifier remover 535 then.

This RS parity check position identifier remover 535 is removed by this RS parity check position identifier inserter 531 and is inserted 20 byte RS parity check position identifiers with the operation that is used for this data interleaver 532 and this data deinterlacing device 534, then the data of handling is exported to this RS encoder 505.In this point, if the data of input corresponding to master data packet, then from 207 bytes of this master data packet from removing last 20 bytes of this RS parity check position identifier.Substitute,, from this 207 byte traffic information data, remove this 20 byte RS parity check position identifier, so that carry out nonsystematic RS cataloged procedure if the data that should import are divided into groups corresponding to this traffic information data.

Another embodiment as this E-VSB preprocessor 504; If the data of input are corresponding to 187 byte master data packet; These RS parity check position identifier inserter 531 executable system RS cataloged procedures are so that insert 20 byte RS parity checks at the end of this 187 byte master data.Therefore, this RS parity check position identifier inserter 531 is removed back 20 byte RS parity checks from this 207 byte master data packet.Simultaneously, this RS encoder 505 that after this E-VSB preprocessor 504, provides, this data interleaver 506, this backward-compatible processor 507, this trellis encoder 508, this frame multiplexer 509, this pilot tone inserter 510, this VSB modulator 511, this RF upconverter 512 are with shown in Figure 10 consistent.Therefore, in order to simplify, the detailed description of identical content is omitted.

The 3rd embodiment

Figure 16 has illustrated according to the structured flowchart of the digital broadcasting transmission system of third embodiment of the invention.With reference to Figure 16, this digital broadcasting transmission system comprises E-VSB preprocessor 601, packet multiplexer 602, data randomizer 603, RS encoder 604, data interleaver 605, E-VSB preprocessor 606, backward-compatible processor 607, trellis encoder 608, frame multiplexer 609, pilot tone inserter 610, VSB modulator 611 and RF upconverter 612.

In digital broadcast transmitting system, master data is input in this packet multiplexer 602 with said structure according to third embodiment of the invention.On the other hand, this traffic information data is input to E-VSB preprocessor 601, it carries out additional code process, so that make this traffic information data can be so that the robustness of noise and channel change is responded rapidly.The structure of each assembly of this E-VSB preprocessor 601 is consistent with E-VSB preprocessor 501 shown in Figure 14 with operation.Therefore, in order to simplify, the detailed description of identical content is omitted.

Be imported in the packet multiplexer 602 by these E-VSB preprocessor 601 pretreated traffic information datas, so that carry out multiplexed with master data packet.Carried out the data randomization from the multiplexed data of these packet multiplexer 602 outputs by this data randomizer 603, be input to then in this RS encoder 604.At this, this data multiplexer 602 divides into groups to carry out multiplexed according to predetermined multiplexed rule to this master data packet and this traffic information data.In this point, this master data packet divides into groups to be multiplexed as to have burst structure shown in figure 10 with this traffic information data.In addition, if this traffic information data is carried out the data randomization by this E-VSB preprocessor 601, then can omit the data randomisation process of carrying out by 603 pairs of these traffic information datas of this data randomizer.

604 pairs of this RS encoders carry out RS coding through these data with the data of polarizer 603 from data randomizer 603 randomizations or bypass, the data of adding 20 byte RS parity checks thus and handling to these data interleaver 605 outputs.In this point, if data that should input corresponding to master data packet, the data of 604 pairs of inputs of this RS encoder are carried out and the same system RS encoding process of conventional ATSCVSB system, the end in this 187 byte data adds 20 byte RS parity checks thus.On the contrary; If the data of input are divided into groups corresponding to this traffic information data; This RS encoder 604 is at first confirmed 20 parity check positions; On the parity byte position of confirming, carry out nonsystematic RS encoding process then, in this traffic information data divides into groups, insert the nonsystematic RS parity check of 20 bytes thus.

This traffic information data is divided into groups to go up execution non-system code process, is because when the value of this traffic information data is changed by this E-VSB preprocessor 606, in the process of back, will describe this process in detail, need recomputate this RS parity check.And in this point, at the output of this data interleaver 605, this parity byte should be than the more late output of this traffic information data byte.This data interleaver 605 receives has the data that make an addition to its parity check through this RS encoder.After carrying out interleaving process, this data interleaver 605 is to this E-VSB preprocessor 606 data that 607 outputs are handled with backward-compatible processor then.At this, this data interleaver 605 receives from the 607 new RS parity checks of calculating and exporting of this backward-compatible processor, exports the nonsystematic RS parity check that the RS parity check that receives replaces also not having output thus.

This E-VSB preprocessor 606 is only handled carrying out additional code from this traffic information data of these data interleaver 605 outputs with symbol unit.For example; If between data bit, inserting VB vacancy bit through this E-VSB preprocessor 601 is 2 bytes with 1 byte expansion; 606 of this E-VSB preprocessors are exported the data of this processing then to effectively stating bit 1/2 rate coding in the code element that is provided with VB vacancy bit and valid data bit.On the other hand; If between data bit, inserting VB vacancy bit through this E-VSB preprocessor 601 is 4 bytes with 1 byte expansion; 606 of this E-VSB preprocessors are exported the data of this processing then to effectively stating bit 1/4 rate coding in the code element that is provided with 3 VB vacancy bits and 1 valid data bit.

Pass through (bypass) this E-VSB preprocessor 606 from the master data or the direct bypass of this RS parity check of these data interleaver 605 outputs.And given data and initialization data placeholder directly bypass pass through (bypass) this E-VSB preprocessor 606.In this point, can replace this known data location identifier with the given data that from this E-VSB preprocessor 606, produces, and output then.In addition, this E-VSB preprocessor 606 produces initialization datas, so that in the beginning of this given data sequence, with the state of the initialize memory in this trellis encoder 608 for confirming.After this, the initialization data that from this E-VSB preprocessor 606, produces is exported, and replaces the initialization data tick lables.Therefore, should from this E-VSB preprocessor 606, be received in the value of memory in this trellis encoder 608.

This backward-compatible processor 607 calculates the corresponding nonsystematic RS parity check of 20 bytes of dividing into groups with this traffic information data that is arranged on 187 bytes and export from this E-VSB preprocessor 606.Subsequently, this data interleaver 605 is exported in the nonsystematic RS parity check of calculating.This data interleaver 605 receives this RS parity byte that calculates and export from this backward-compatible processor 607, then the RS parity byte output that receives is replaced nonsystematic RS parity check.At this, this backward-compatible processor 607 is carried out nonsystematic RS cataloged procedure, because this E-VSB preprocessor 606 changes the value of this traffic information data and this initialization data placeholder.Therefore, when carrying out decoding process, can prevent decoding error through conventional ATSC vsb receiver.In other words, carry out this process backward compatibility to be provided to this routine ATSC vsb receiver.

Data and the bypass of being carried out additional code and replacement by this E-VSB preprocessor 606 is imported in this trellis encoder 608 so that carry out grid coding through the data of this E-VSB preprocessor 606.After this, the data of this grid coding are in proper order through this frame multiplexer 609, pilot tone inserter 610, this VSB modulator 611 and RF upconverter 612.Simultaneously, according to other embodiments of the invention, the initialization data of the memory that is used for initialization trellis encoder 608 of generation produces from this trellis encoder 608 rather than this E-VSB preprocessor 606.In this case, the traffic information data that backward-compatible processor 607 receives from this E-VSB preprocessor 606 divides into groups, so that calculate this parity values.At this, this traffic information data divides into groups to comprise will be by the initialization data placeholder of this initialization data replacement.And, the initialization data that this backward-compatible processor 607 receives from this trellis encoder 608.After this, the nonsystematic RS parity check of calculating is outputed in this trellis encoder 608.Below the residue process with shown in Figure 10 consistent.Therefore, for the sake of simplicity, the detailed description of identical content is omitted.In addition, this frame multiplexer 609, pilot tone inserter 610, this VSB modulator 611 and this RF upconverter 612 are with shown in Figure 10 consistent.Therefore, the detailed description of identical content is omitted.

Figure 17 has illustrated according to the block diagram of the digital broadcast receiving system of the embodiment of the invention.Especially, Figure 17 illustrated to show can receive from the traffic information data of emission system emission and separate and has been in harmonious proportion the data that equilibrium received, and thus the data of processing reverted to the block diagram of digital broadcast receiving system of its initial condition.With reference to Figure 17, this receiving system comprises tuner 701, demodulator 702, demultiplexer 703, audio decoder 704, Video Decoder 705, local (native) TV application manager 706, domain channel manager 707, channel map 711, first memory 709, data decoder 710, second memory 711, system administration manager 712, data broadcasting application manager 713 and GSP module 714.At this, first memory 709 is corresponding to nonvolatile storage (NVRAM) (or flash memory).

This tuner 701 is intermediate frequency (IF) signal with this tuning frequency down conversion through the frequency of any one the tuning special channels in antenna, cable and the satellite thus.After this, down signals is exported to this demodulator 702.In this point, this tuner 701 is by these domain channel manager 707 controls.To report to domain channel manager 707 corresponding to the result and the intensity of the broadcast singal of tuning channel.At this, the data that the frequency through special channels receives comprise this master data, strengthen data and this master data and strengthen the table data of data of being used to decode.In the example that the present invention provides, traffic information data and transport information provide table to can be applicable to strengthen data.

702 pairs of signals from these tuner 701 outputs of this demodulator are carried out VSB and are separated the processing of mediation channel equalisation.Then, behind this master data of identification and traffic information data from signal, this demodulator 702 is through TS grouped element output these data (or signal).In the process of back, will describe the structure and the operation of this demodulator 702 in detail.In example of the present invention, have only from this traffic information data of this demodulator 702 outputs and divide into groups to be imported into this demultiplexer 703.In other words, this master data packet can be imported in other demultiplexer (not shown) of handling master data packet.And, can also design the present invention in one way, i.e. also this enhanced data packet of demultiplexing and this master data packet of this demultiplexer 703.In description of the invention, with reception and the processing of describing this traffic information data in detail.And, should be noted that and can omit the detailed description of handling from the master data of this demultiplexer 703 beginnings.

Based on the control of this data decoder 710, this demultiplexer 703 this this traffic information message of traffic information data grouping demultiplexing and this PSI/PSIP table from being transfused to.After this, the traffic information message of this demultiplexing and SPI/PSIP table is outputed in the data decoder 710 with the form of section.In the example that the present invention provides, exported with the DSM-CC sector format by the traffic information message that the pay(useful) load in this TS grouping is carried.In this point, this demultiplexer 703 is carried out the section filtration treatment based on the control of this data decoder 710, so that the section of deletion repetition, and only non-repetitive section is outputed in this data decoder 710.And this demultiplexer 703 can output to the section that constitutes the table (for example CVT) of hoping through the section filtration treatment in the data decoder 710.At this, this VCT comprises transport information descriptor shown in Figure 7.This transport information descriptor also can be included among this PMT.

This fragment filter method be included in checking by the table of this MGT definition (for example, after PID VCT), the method that the initialization section filters, and when this VCT has fixing PID (that is, basic PID), the initialization section filters and does not verify the method for this MGT.In this point, this demultiplexer 703 is carried out the section filtration through waiting with reference to this table_id field, version_number field, this section_number field.This goes the DSM-CC segment of this multiplexed traffic information message these data decoder 710 analysis configuration.Then, data decoder 710 is decoded as the result's of analytic process traffic information message, and then this traffic information message is stored in the database of second memory 711.This data decoder 710 will have a plurality of section marshallings of identical table identifier (table_id) to be provided with and analytical table.Then, this data decoder 710 will be stored in the database of second memory 711 as the system information of analysis result.

Second memory 711 is to store the system information of passing through this table analysis and table and the data carousel database that passes through the traffic information message of this DSM-CC sectional analysis.Can know whether table is provided with single section or a plurality of section through table_id field, this section_number field and last_section_number field in the table.The TS data marshalling that for example, only will have the PID of this VCT becomes section.This VCT of section marshalling becoming that will have on the other hand, the table identifier of distributing to this VCT.

When analyzing this VCT, can obtain about it is sent the information of the virtual channel of transport information.In addition, can obtain as shown in Figure 7, with the relevant supplementary of transport information described in the transport information descriptor that in this VCT, comprises.Especially; When analyzing this transport information descriptor; Can obtain to send to application identification information, Service Component identification information, business information (for example, Business Name, business description, traffic flag, user profile, free text message, help information etc.) of this traffic information message of respective virtual channel etc.

Application identification information, Service Component identification information, the business information of this traffic information message that obtains as stated can be stored in second memory 711 or export to data broadcasting application manager 713.In addition, can be with reference to application identification information, Service Component identification information, business information with this traffic information message of decoding.Substitute, this application identification information, Service Component identification information, business information can be used for analyzing the operation of this application program that is used for this traffic information message.

These data decoder 710 controls are corresponding to the demultiplexing of the system message list of the table relevant with channel and event information.After this, this data decoder 710 can be sent A/V PID tabulation to this domain channel manager 707.This domain channel manager 707 can be used to receive the information table relevant with this system with reference to this channel map 708 request of sending (or order), and this domain channel manager 707 can receive corresponding results then.This domain channel manager 707 is the channel tuning of this tuner 701 of may command also.And this domain channel manager 708 directly this demultiplexer 703 of control is controlled this Voice &

Video decoder

704 and 705 thus so that directly set up this A/V PID.

These Voice & Video data of demultiplexing from this master data packet can decoded and export to this Voice &

Video decoder

704 and 705 respectively, perhaps decodes respectively and export the Voice & Video data of demultiplexing from this traffic information data divides into groups.Simultaneously; According to embodiments of the invention; Obviously, when traffic information data and voice data and video data comprise in these enhancing data, can be through this voice data and the video data of these demultiplexer 703 demultiplexings respectively by this audio decoder 704 and Video Decoder 705 decodings.For example, this audio decoder 704 can be through using audio coding (AC)-3 decoding algorithm this voice data of decoding, and this Video Decoder 705 can be through using MPEG-2 decoding algorithm this video data of decoding.

Simultaneously, this this locality TV application manager 706 operates in the local application of storage in this first memory 709, carries out common function thus, switches like channel.This local application is meant installed software when paying (shipping) this receiving system.Especially, when through user interface (UI) user's request being sent to this receiving system, this this locality TV application manager 706 is presented at request on the screen through graphic user interface (GUI), responds this user's request thus.This user interface is through input equipment, like remote controller, keyboard, fine motion dial (jog dial) and the touch-screen that on display screen, provides, receives user's request.After this, this user interface is exported to local TV application manager 706, data broadcasting application manager 713 etc. with the user's request that receives.

TV application manager 706 these domain channel manager 707 of control in this this locality are controlled the channel relevant with operation thus, as manage this channel map 708 and this data decoder 710 of control.In addition, the GUI control that local TV application manager 706 will this general receiving system, the state storage of this user's request and this receiving system and is also recovered canned data in this first memory 709 in first memory 709.This domain channel manager 707 controls this tuner 701 and this data decoder 710 are managed this channel map 708, thus so that can respond this channel request of being undertaken by the user.

Especially, this domain channel manager 707 is sent to this data decoder 710 and is asked, so that can analyze and want the tuning relevant table of channel.After this, this domain channel manager 707 receives the report of the analysis result of respective table from this data decoder 710.Then, based on the analysis result of this report, this domain channel manager 707 is upgraded this channel map 708.This domain channel manager 707 also is established to the PID of this demultiplexer 703, so that from the relevant table of this this traffic information message of traffic information data demultiplexing.This system administration manager 712 is controlled the guiding of this receiving system through switching on and off power supply, then, this ROM image (comprising the downloaded software image) is stored in the first memory 709.In other words, these first memory 709 storage operation programs, as operate the required operating system of this receiving system (OS) program and carry out the application program of this data service function.

This application program is to handle the program of this traffic information message of storage in this second memory 711, provides this transport information professional to this user thus.If the datacast data byte except this traffic information data is stored in the second memory 711, the application program processes corresponding data by this application program or other types offers the user then.Can upgrade or revise the operation sequence and the application program of storage in this first memory 709 through newly downloaded program.In addition, even owing to when cutting off this driving power, can not delete the operation sequence and the application program of storage, therefore when this driving power is supplied power, can carry out this program and need not download new procedures.

Can when paying this receiving system, will provide the professional application program of this transport information to be installed in the first memory 709, perhaps after downloading, be stored in after a while in the first memory 709 according to the present invention.And, can delete, upgrade and revise the application program (that is, transport information provides application program) that is used for this transport information business that is stored in the first memory 709.In addition, this business information provides application program to download with this traffic information data, and when receiving this traffic information data, carries out at every turn.

When carrying out data service request through this user interface, this data broadcasting application manager 713 operates in the corresponding application programs of storage in this first memory 709, so that handle the data of request, the data service of request is provided to the user thus.And for this data service is provided, this data broadcasting application manager 713 is supported GUI.At this, this data service is provided with forms such as text, voice, figure, rest image, moving images.This data broadcasting application manager 713 can have the platform that is used for carrying out this application program of storing at this first memory 709.This platform can be for example, to be used to carry out the Java Virtual Machine of java applet.

Below; With describing in detail application program is provided, handles the traffic information message of storage in this second memory 711 then and come to provide transport information professional example to the user through making this data broadcasting application manager 713 carry out this transport information that is stored in this first memory 709.Provide of the present invention this transport information professional with at least a form in text, voice, figure, rest image and the animation to the user through receiver, this receiver only have the electronic chart wherein installed and GPS one of them, perhaps one does not have yet.If this GPS module 714 is installed in the receiving system shown in figure 13; The satellite-signal that this GPS module 714 receives from a plurality of LEO satellite transmissions; So that extract current position information (promptly; Longitude, latitude, highly), the information of being extracted to these data broadcasting application manager 713 outputs thus.In this, suppose to comprise that electronic chart and various graphical information about the information of each link and node are stored in the memory cell (or memory) except that first memory 709 or second memory 711.

Through carrying out this transport information application program is provided; This data broadcasting application manager 713 provides professional by this transport information of user's request based on the current location information that obtains from this GPS module 714 and the traffic information message of storage second memory 711.Especially, based on the request of this data broadcasting application manager 713, this traffic information message of storage is read and is input to this data broadcasting application manager 713 in this second memory 711.This data broadcasting application manager 713 is analyzed this traffic information message that from this second memory 711, reads, required according to the contents extraction of this message thus information and/or control signal.In description of the invention, suppose that the user has asked CTT professional.

Especially; This data broadcasting application manager 713 extracts message id (promptly from the management container 102 of each traffic information message (or TPEG message); Message components (messagecomponent)), message generation time, transmission of messages time whether equal the CTT status container so that on the basis of this message components, confirm the container of back.In this case, this message components information comprises message id and version number.And it is that all message are necessary that this message is formed, and is used to manage the message of this data broadcasting application manager 713.

If the container of back is confirmed as CTT status container 104, this data broadcasting application manager 713 obtains (or obtaining) information from the CTT state component of this CTT status container 104.What this data broadcasting application manager 713 obtained (or obtaining) and current transmission from this TPEG position container 106 carries the pairing positional information of transport information.In this case, according to the location type information of this TPEG position container, this positional information can be the position coordinates (longitude and latitude) of starting point and terminal point, or the link of starting point and terminal point.In other words, this positional information can be to distribute to the link ID of highway section (that is road link).As long as need, through link or the nodal information with reference to storage in this second memory 711, the information link corresponding that section can be appointed as and receive.

The assumed position type information is link ID, and this positional information is the text data (for example, road name) relevant with this link ID or link, and the present invention can be through specifying the link that carries state information corresponding to the traffic that receives with reference to corresponding link information.If this positional information of serving as link ID is used to stipulate the code of this link ID, the present invention can specify the link corresponding to the communications and transportation state information that receives through the respective link system with reference to storage in second memory 711.

Simultaneously, receiving on the basis of current position coordinates from this GPS module 714, this data broadcasting application manager 713 reads the data of electronic chart from this second memory 711, and the electronic map data that reads is presented on the display screen.In this case, particular graphic symbol is displayed on the specified point corresponding with current location.Under said circumstances; This data broadcasting application manager 713 receives average link speed information; So that the information that receives is presented at the ad-hoc location coordinate place of position container or is presented at the link place of respective links ID, this position container is after the container that is equipped with average link speed information.For aforesaid operations, various colors is distributed to single average link speed.

For example, if the road on this image is confirmed as current road, per hour 0 to 10 kilometer of redness expression, per hour 10 to 20 kilometers of orange expressions, per hour 20 to 40 kilometers of green expressions, and blueness is represented per hour at least 40 kilometers.Have particular value ' 1 ' or ' 2 ' if stop up change information, character string (' increase ' or ' reducing ') or the icon of distributing to particular value ' 1 ' or ' 2 ' are presented on the corresponding link with the obstruction change information.If this obstruction change information has particular value ' 0 ' or ' 3 ', then show state can not be updated to new state, so that keep the state of current demonstration.

If the driver asks to show the average speed in the link of drive route; This data broadcasting application manager 713 be presented at figure in a plurality of mean velocity information that receive through this traffic information message with in the corresponding mean velocity information of the link in this current drive route the place ahead (if or projected route, then this link belongs to drive route).If the driver asks to show the traveling time along the link of drive route; This data broadcasting application manager 713 can with image be presented in the traveling time of a plurality of links that receive through this traffic information message with in the corresponding traveling time information of the link in this current drive route the place ahead (if or projected route, then this link belongs to this drive route).

For example; When (for example providing with the resolution meticulousr than 1.8km/h; Fig. 4 A is to the execution mode of 4C) during average speed on the link, on screen, show this average speed through the value that is included in the respective field according to predetermined resolution (1km/h among Fig. 4 B).Because this resolution is 1km/h, represent the difference of two average speeds between the adjacent link with 1km/h resolution (should the zone) or a plurality of resolution with ' A ' mark.If receive with other predetermined resolution (0.9km/h among Fig. 4 A; Perhaps 0.5km/h and the 0.9km/h among Fig. 4 C) mean velocity information of expression; Obtain this average speed through the information that receives multiply by predetermined resolution, and the difference of the average speed between two adjacent link becomes a plurality of resolution.

For example, when the traveling time quilt that is used for link with the second being the information (the for example execution mode of Fig. 5 A to 5E) of unit representation when providing, be that the information of unit is also shown on the screen with the second.If receive is the temporal information of unit representation with the second only, when needing, can convert the traveling time of the link that receives into a minute unit: the form of second unit.

Can be with the average speed of link or traveling time along direction of advance or on predetermined link and on the displayed map.

In the execution mode of Fig. 4 A and 4C; Although the average speed of link can show the difference less than 1km/h; Because the numerical value of this average speed separately is presented on the screen; Based on the information that shows, or the traveling time that obtains divided by the average speed that comprises equal resolution based on the length by respective link, the driver can select to drive the link that passes through.

According in order to simplify an execution mode of demonstration,, can show the average speed on the link after the place value after abandoning decimal point according to user's selection.Equally,, can only keep and demonstration minute part, abandon a second part for traveling time.

Because it is the information of unit representation that the traveling time of the link in decoded state assembly (ID=01) can have with the second; When this is advanced when 713 transmission of broadcasted application manager; Through to minute with second each distribute a byte or, can transmit two byte information through will the travel time converting second into.(when reception is 16 bit informations of unit representation with the second) as this information of equally transmission that receives.Therefore, when this server also provides when with the second being the traveling time of link of information of unit (for example, the execution mode of Fig. 5 A to 5E) expression, this data broadcasting application manager 713 can make navigation engine 5 that the traveling time of link is expressed as second; When automatic route locating function was provided, this data broadcasting application manager 713 can comprise to search the shortest route as the traveling time of the link of resolution second through using.

If this digital broadcasting transmitter, that is, the terminal of Figure 17 is equipped with instantaneous speech power, the mean velocity information or the traveling time that are used for the link that particular link or drive route comprise that this terminal can receive with voice output.

Figure 18 has illustrated to show according to the reception of the embodiment of the invention and has handled the flow chart of the treatment step of traffic information data.With reference to Figure 18, with the method for describing the treatment in accordance with the present invention traffic information data in detail.Especially; When the power connection (S721) of receiving system, and when inputting channel selection and channel switching (S722), through using channel map (S713); The channel information that receives is tuned as physical frequencies, so that the channel of selecting or switching corresponding to utilizing channel map.At this, carry out this channel selection or channel switching according to user command or system command.

In this point, can receive the traffic information data that wherein has multiplexed traffic information message and system information through tuning as stated channel frequency.If receive this traffic information data (S724), this demultiplexer 703 filters this traffic information message of demultiplexing and system message list (S725) through using PID extraction and section.In this system information, the table relevant with channel information comprises VCT or PAT/PMT.At this, according to the present invention, at least one among PMT and the VCT can comprise this transport information descriptor.Through analyzing this system message list, can obtain information, and can know whether the A/V element flow is sent out to the corresponding virtual signal, and whether this traffic information data is sent out about virtual channel.If this traffic information data is sent to virtual channel, can obtain application identifier, Service Component identifier and business information through analyzing this transport information descriptor.

Especially, the PID through in reference element stream type (ES type) and the system message list (that is, VCT and/or PAT/PMT) is extracted in the information on this virtual channel.If the channel information that from this system message list, extracts is represented A/V ES and is present in (S727) in this virtual channel, be based upon the A/V PID (S728) of the respective virtual channel in this channel map, carry out A/V demultiplexing and decoding (S729) thus.Therefore, the user can watch the broadcast program (S730) corresponding to this A/V.Simultaneously, if in step S727, represented in this virtual channel, not exist A/V ES, then when this traffic information data sends to this virtual channel (S731) to the present invention's checking.

Can propose to be used to verify whether this traffic information data has been sent out the several different methods to virtual channel.For example, can carry out checking, and also can carry out checking through using the PID in this TS grouping through this system message list of analysis.When hypothesis sends to this traffic information data in the DSM-CC section; Through any one field value in the stream_type field of analyzing the professional location descriptor among stream_type field and this VCT in this PMT, can know this traffic information data that has (appearance).In other words, if this stream_type field value is ' 0x95 ', this this traffic information data of expression has sent to corresponding virtual channel.Therefore, if this traffic information data of checking is sent out to this virtual channel in step S731, then receives and be sent out all transport information (S732) with DSM-CC data format to this virtual channel.The transport information professional (S733) that provides the user to need (or request) thus.

If checking does not exist this A/V ES or this traffic information data in this virtual channel in step S731, then corresponding virtual channel is confirmed as invalid channel.In this case, for example, this system can show the message (S736) that does not have effective channel or signal.After this, this process is returned step S724, so that receive effective channel information table again.

Simultaneously, this system verification is in the request (S734) that maybe when watching broadcast program, whether changes (or switching) channel during the data service.If asked to change channel, and if should request corresponding to changing this virtual channel, this data broadcasting process is reset, and this process returns step S726, so that find one group of new virtual channel information.And, if should request corresponding to changing physical channel, this process is returned step S723, so as be tuned to corresponding physical channel.

Yet if request changes this channel, whether this system verification channel information version upgrade (S735).Upgrade if in step S735, confirm this channel information version, this this channel information of expression has been broadcasted the station and has changed (or modification).Therefore, this process is returned step S724, so that receive new channel information table.On the contrary, do not change (or modification), then can recover to watch broadcast program if in step S735, confirm this channel information.

Use the given data information that inputs to the traffic information data section according to this demodulator of the present invention (reference marker 702 of Figure 17), send by this transmitting system then, so that carry out like processes such as carrier synchronization recovery, frame synchronization recovery, channel equalisations.Therefore, can strengthen this receptivity.Figure 19 and Figure 20 have illustrated the detailed diagram of demodulator of Figure 17 respectively.

With reference to Figure 19, this demodulator comprises VSB demodulator 761, equalizer 762, known array (or data) detector 763, E-VSB block decoder 764, E-VSB data processor 765 and master data processor 766.Especially, intermediate frequency (IF) signal by the tuning channel frequency of this tuner 701 (shown in Figure 17) is imported into this VSB demodulator 761 and known sequence detector 763.The IF signal of 761 pairs of inputs of this VSB demodulator carry out from gain controlling, carrier wave recovers and the timing recovery process, is baseband signal with this IF signal change thus.Then, this VSB demodulator 761 is to this equalizer 762 and the new baseband signal that produces of known sequence detector 763 outputs.The channel distortion that these equalizer 762 compensation comprise in this restituted signal, and should the mistake compensating signal to these E-VSB block decoder 764 outputs.

In this point, this known sequence detector 763 detects the known array position of being inserted by this transmitting terminal from the I/O data (that is the data after data before the demodulation or the modulation) of this VSB demodulator 761.After this, this positional information is exported to this VSB demodulator 761 and this equalizer 762 with the sequence of symhols of this given data, produce the sequence of symhols of this given data according to the position of this detection.And this known sequence detector 763 is to these E-VSB block decoder 764 outputs and the relevant information of master data of carrying out this traffic information data of additional code through transmitting terminal and not carrying out additional code.At this, allow this E-VSB block decoder 764 to distinguish the information of (or identification) this traffic information data and master data to these E-VSB block decoder 764 outputs.Although not shown connection status in Figure 19 almost can be used the information that is detected by this known sequence detector 763 in whole receiving system.At this, the information of this detection also can be used in these E-VSB data and go among formatter 765-1 and the RS frame decoder 765-2.

Between convalescence, this VSB demodulator 761 uses given data sequence of symhols, strengthens demodulation performance thus at sequential and/or carrier wave.Equally, this equalizer 762 uses this given data sequence, strengthens equalization performance thus.In addition, can also the decoded result of E-VSB block decoder 764 be fed back to equalizer 762, strengthen equalization performance thus.Simultaneously; When the data that after by these equalizer 762 equilibriums, are imported into this E-VSB block decoder 764 when carrying out the traffic information data of additional code and grid coding by transmitting terminal, this equalizer 762 is decoded and trellis decode is carried out the contrary processing procedure of transmitting terminal through the enhancing data of input add.On the other hand, when the data of input were not carried out the master data of additional code corresponding to only having carried out grid coding, 762 master datas to input of this equalizer were carried out trellis decode.

Data set by these E-VSB block decoder 764 decodings outputs in this E-VSB data processor 765, and this packet is outputed in this master data processor 766.Especially, when the data of input during corresponding to master data, 764 pairs of inputs of this E-VSB block decoder data are carried out Veterbi decoding, so that output hard decision value, or soft-decision-value are carried out hard decision and export this hard decision value.Simultaneously, when the data of input during corresponding to this traffic information data, these E-VSB decoder 764 outputs are about the hard decision value or the soft-decision-value of the enhancing value of input.

Especially, when the data of this input during corresponding to this traffic information data, 764 pairs of E-VSB piece processor and trellis encoder coded datas by this transmitting system of this E-VSB block decoder are carried out decode procedures.In this point, the data of the RS frame encoder of the E-VSB processor that from this transmitting system, comprises output can be corresponding to foreign key, and can be corresponding to internal code from each E-VSB piece processor and the data that trellis encoder is exported.When this concatenated code of decoding, the decoder of this internal code should be exported soft-decision-value, makes to strengthen the external encode performance.Therefore, this E-VSB block decoder 764 can be exported the hard decision value about this traffic information data.Yet the output soft-decision-value is more favourable.

As an example of the present invention, this E-VSB data processor 765 comprises that the E-VSB data go formatter 765-1, RS frame decoder 765-2 and E-VSB to remove randomizer 765-3.In the E-VSB preprocessor of transmitting system (shown in figure 11), using these structures will be effectively, and it comprises E-VSBG randomizer, RS frame encoder, E-VSB piece processor, group formatter, data deinterlacing device and packet formatter.This master data processor 766 comprises that data deinterlacing device 766-1, RS decoder 766-2 and data remove randomizer 76-3.

At this, this data deinterlacing device 766-1, RS decoder 766-2 and the data that are included in this master data processor 766 go randomizer 766-3 to be used to receive the required module of this master data.Therefore, in the structure of this receiving system that receives only this traffic information data, can not need these modules.This data deinterlacing device 766-1 carries out the inverse process that is included in this data interleaver in the transmitting terminal.Especially, this data deinterlacing device 766-1 carries out deinterleaving to the master data of output from this E-VSB block decoder 764, and the data of this deinterleaving are exported to this RS decoder 766-2.

This RS decoder 766-2 decodes to the data executive system RS of deinterleaving, and goes the data of this RS decoding of randomizer 766-3 output to these data.These data go randomizer 766-3 to receive the output of this RS decoder 766-2, and produce the consistent pseudo-random data byte with the randomizer that in this transmitting system, comprises.After this, these data are gone pseudo-random data byte execute bit logic XOR (XOR) operation of randomizer 766-3 to producing, thus to each grouping begin to insert the MPEG sync byte so that with these data of 188 byte master data packet unit output.In this point, these data go the output of randomizer 766-3 can be input in this demultiplexer shown in Figure 17 703.Substitute, these data go the output of randomizer 766-3 can be input to the special-purpose demultiplexer (not shown) of master data, and it is these A/V data of demultiplexing and the table relevant with channel information from master data.

Being input to these E-VSB data from the data of this E-VSB block decoder 764 outputs with the data set form goes the formatter 765-1.In this point, these E-VSB data go formatter 765-1 to know the structure of this input data set.Therefore; These E-VSB data go formatter 765-1 to remove this master data; Be inserted into the given data in this data set, grid initialization data, MPEG header and the RS parity check of adding by the RS encoder of this transmitting system, all these is inserted in the main data group.After this, these E-VSB data go formatter 765-1 only this traffic information data to be outputed to this RS frame decoder 765-2.Especially, this RS frame decoder 765-2 receives only by these E-VSB data and goes formatter 765-1 to carry out this traffic information data of RS coding and/or CRC coding.

This RS frame decoder 765-2 carries out the inverse process of the RS frame encoder that in this transmitting system, comprises.Therefore, this RS frame decoder 765-2 is corrected in the mistake in this RS frame.After this, the 1 byte MPEG sync byte during the traffic information data of error correction divides into groups to be added on RS frame cataloged procedure, removed of this RS frame decoder 765-2.Then, the data of handling are outputed to these E-VSB data and remove randomizer 766-3.In this point, if this traffic information data has been carried out the line replacement process, replacement process also need drive in the wrong direction.These E-VSB data are gone randomizer 766-3 that the traffic information data of input is carried out and are gone randomisation process, and it is corresponding to the inverse process of this E-VSB randomizer that in this transmitting system, comprises, and the data of output processing.Therefore, this transmitting system can receive the traffic information data that sends.

Simultaneously, if in the structure of the E-VSB preprocessor that in transmitting system, comprises, this E-VSB randomizer is positioned at after the RS frame encoder, and this E-VSB data processor can include only these E-VSB data and go formatter and this RS frame decoder.In this case, these E-VSB data go the operation of formatter to go formatter to have part different with E-VSB data shown in Figure 19.In other words, these E-VSB data shown in Figure 19 go formatter and above-mentioned E-VSB data to go the difference between the formatter to be, at first this traffic information data are carried out and are gone randomisation process, carry out this RS frame decoding process then.

In this case, only carry out these data and go randomisation process, perhaps these data go randomisation process to carry out with this sky data removal process.Be based on the structure and the operation of this E-VSB preprocessor that comprises in this transmitting system, this can be different.Especially; Organize the sequence of positions of formatter and whether only valid data are carried out this cataloged procedure based on this E-VSB piece processor and this by this E-VSB piece processor; Can only carry out these data and go randomisation process, perhaps carry out these data and go randomisation process and empty data to remove process.

For example, if in this E-VSB preprocessor, this E-VSB piece processor is positioned at before the group formatter, and this receiving system need not removed should the sky data, because do not carry out byte expansion.In addition, handle although carry out byte expansion, handle (for example, if carry out this cataloged procedure with 1/2 or 1/4 code rate) if this E-VSB piece processor is carried out additional code to these valid data, this receiving system need not removed the process of these sky data.On the contrary, if in this E-VSB preprocessor, this E-VSB piece processor is positioned at after this group formatter, and this receiving system need be carried out the byte expansion process.In this case, if this E-VSB piece processor is carried out all data types of additional code process (for example, if carry out this cataloged procedure with 1/2 or 1/4 code rate), this receiving system need be removed empty data.

Yet, remove the byte of expansion if desired, based on the structure of transmitting system, this byte is removed processing procedure and is gone the order of randomization process to change.Especially,, after this randomisation process, carry out this byte expansion, then in receiving system, at first carry out this byte before this goes randomisation process in execution and remove process if in transmitting system.On the contrary, if in transmitting system, change the order of handling, the order of handled also changes in receiving system.

When carrying out this and go the randomization process, if in the back in the process RS frame decoder need soft-decision, and if; Therefore; This E-VSB block decoder receives soft-decision-value, is difficult between soft-decision and the pseudo-random bits and carries out xor operation, and this pseudo-random bits is used to randomization.Therefore, when between the soft-decision-value of this pseudo-random bits and this traffic information data bit, carrying out xor operation, and when this pseudo-random bits equaled ' 1 ', these E-VSB data went formatter to change the code of this soft-decision-value and the code that output changes.On the other hand, if this pseudo-random bits equals ' 0 ', then these E-VSB data go this soft-decision-value of formatter output and code on have no variation.Therefore, can keep the state of this soft-decision and send it to this RS frame decoder.

As stated; If this pseudo-random bits equals ' 1 ', the code of this soft-decision-value is changed, because when in the randomizer of transmitter; Between this pseudo-random bits and input data, carry out xor operation; And when this pseudo-random bits equaled ' 1 ', the code of this dateout bit became the inverse value (that is, 0 XOR 1=1 and 1 XOR 0=0) of input data.Especially, if this pseudo-random bits of going to produce the formatter from this E-VSB packet equals ' 1 ', and when the hard decision value of this traffic information data bit was carried out xor operation, the value of this xor operation became the inverse value of this hard decision value.Therefore, when this soft-decision-value of output, export the code opposite with this soft-decision-value.

Therefore, this RS frame decoder is carried out the inverse process of the RS frame encoder that in this transmitting system, comprises.Therefore, this RS frame decoder is corrected the mistake in this RS frame.Subsequently, this RS frame decoder is added the 1 byte MPEG sync byte of in RS frame cataloged procedure, being removed in the traffic information data of error correction divides into groups.Therefore, can obtain the initial traffic information data that sends by this transmitting system.

Figure 20 has illustrated to invent according to this law the detailed diagram of the demodulator of second embodiment.With reference to Figure 20, this demodulator comprises that VSB demodulator 781, equalizer 782, known array (or data) detector 783, Viterbi decoder 784, data deinterlacing device 785, RS decoder 786, data remove randomizer 787 and E-VSB data processor 788.Comprise master data packet remover 788-1, E-VSB divide into groups to go formatter 788-2 and E-VSB data processor 788-3 at this this E-VSB data processor 788.It will be effective that demodulator shown in Figure 20 is applied in the transmitting system with structure shown in Figure 16.In addition, this VSB demodulator 781, equalizer 782 and known sequence detector 783 are with shown in Figure 19 consistent.Therefore because can be with reference to the structure of same components, in order to simplify, identical content be described in detail in this omission.

784 pairs of this Viterbi decoders carry out Veterbi decoding from the data of these equalizer 782 outputs, and are byte with the data transaction of this Veterbi decoding.After this, data converted is exported to data deinterlacing device 785.This data deinterlacing device 785 is carried out the contrary of data deinterlacing device of transmitting system and is handled, and exports the data of deinterleavings to this RS decoder 786.If the packet that receives is a master data packet, this RS decoder 786 carries out the RS decoding with the master data packet that receives.Substitute, divide into groups if the packet that receives is a traffic information data, this RS decoder 786 is removed nonsystematic RS parity byte, and goes the data of randomizer 787 output processing to these data.

These data go the output of 787 pairs of RS decoders 786 of randomizer to carry out the inverse process of the randomizer of transmitting system.After this, these data go randomizer 787 each packet begin to insert this MPEG sync byte, thus with these data of 188 byte data grouped elements output.These data go the output of randomizer 787 to be exported to this demultiplexer 703 (shown in Figure 17) or the special-purpose demultiplexer (not shown) of this master data simultaneously, and export to the master data packet remover 788-1 of this E-VSB data processor 788.

This master data packet remover 788-1 removes 188 byte master data packet from the data that these data go randomizer 787 to export, and divides into groups to go the data of formatter 788-2 output processing to this E-VSB.This E-VSB divides into groups to go formatter 788-2 from this 188 byte data is divided into groups, to remove 4 byte MPEG headers, given data and grid initialization data.Then, this E-VSB packet goes formatter 788-2 only to export this traffic information data to this E-VSB data processor 788-3.In this point, this E-VSB divides into groups to go formatter 788-2 to remove or do not remove should the sky data.

Especially, when the E-VSB of this transmitting system shown in figure 16 preprocessor is carried out additional code to this traffic information data, and therefore, when only effective traffic information data being carried out coding, need not remove empty data.On the contrary, if the traffic information data of all byte expansion is carried out the additional code process, then must remove empty data.This E-VSB data processor 788-3 divides into groups to go the output of formatter 788-2 to carry out the inverse process of the E-VSB preprocessor that comprises in this transmitting system to E-VSB.Therefore, can obtain from the initial traffic information data that sends of transmitting system.

As stated, the advantage of the method for this digital broadcast transmission/receiving system and deal with data is that when through channel receiving traffic information data, this data error has robustness, and compatible with the vsb receiver of routine.And, even in channel with serious noise and ghost effect, also can the effective reception data and do not make a mistake.

In addition,, robustness is provided, allows the suitably variation of response channel environment of these data thus to this traffic information data through traffic information data being carried out additional error correction coding and error detection coding processing procedure and being sent the data of handling.And, be used to provide the link identifier of this traffic information data through use, can minimize this transmission capacity.And, through the serious traffic state information that stops up of warning in advance, can disperse this volume of traffic fully, allow road effectively to circulate thus.The present invention that will have above-mentioned advantage can be applied to robustness greatly with opposing noise and ghost effect move with portable receiver in, the present invention can more effectively be able to utilization.

It will be apparent to those skilled in the art that do not depart from the scope of the present invention with essence situation under, but modifications and variations of the present invention are.Therefore, the invention is intended to cover modification of the present invention and the variation in accessory claim and the equivalent scope thereof.

Claims

1. method of in digital broadcasting transmitter, handling traffic information data, said method comprises:

Reception comprises the traffic information data of traffic information message and system information;

The transport information that demodulate reception arrives;

Detect the position of the prevision data of inserting by transmitting terminal the transport information after demodulation;

Use said prevision data that said traffic information data is carried out channel equalisation;

Traffic information data behind the channel equalisation is carried out soft-decision decoding;

Decoded traffic information data is carried out error correction;

This traffic information message of demultiplexing and this system information from said traffic information data;

Use the said system information said traffic information message of decoding, extract thus and the average speed of traffic route and at least one the relevant information in the route traveling time, and with the state information location information related; With

Use the information of extracting to provide transport information professional to the user.

2. method as claimed in claim 1, wherein said traffic information data is corresponding to strengthening data.

3. digital broadcasting transmitter comprises:

Demodulator; Its demodulation comprises the traffic information data of traffic information message and system information; Detect the position of the prevision data of inserting by transmitting terminal the transport information after demodulation; Use said prevision data that said traffic information data is carried out channel equalisation, and the traffic information data behind the channel equalisation is carried out error correction;

Data demultiplexing and decoding unit, they are said traffic information message of demultiplexing and said system information from the data of error correction, and utilizes said system information that the traffic information message of demultiplexing is decoded;

Data storage, it stores the traffic information message of said system information and decoding; With

Application manager, it is through extracting and the average speed of traffic route and at least one the relevant information in the route traveling time, and with the state information location information related, the traffic information message that utilization is stored is to the user

Provide transport information professional.

4. digital broadcasting transmitter as claimed in claim 3, wherein said traffic information data is corresponding to strengthening data.