CN100426853C - Data structure of virtual channel table and transmission flow judging method - Google Patents

Data structure of virtual channel table and transmission flow judging method Download PDF

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CN100426853C
CN100426853C CN 200510035560 CN200510035560A CN100426853C CN 100426853 C CN100426853 C CN 100426853C CN 200510035560 CN200510035560 CN 200510035560 CN 200510035560 A CN200510035560 A CN 200510035560A CN 100426853 C CN100426853 C CN 100426853C
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stream
information
type
additional
service location
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CN1893583A (en
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文京洙
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乐金电子(惠州)有限公司
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Abstract

本发明涉及一种传送流判别方法,是利用属于节目及系统信息协议的表中的虚拟频道表,判断在一个频道中传送的流的种类的方法,特别是,通过在TVCT的service location descriptor里追加表示所述流的附加说明是否存在的信息,并在所述信息表明关于流的附加说明存在时,一起插入并传送关于流的附加说明叙述字,只通过TVCT,能够区分在一个频道里传送的多个流。 The present invention relates to a method of determining a transport stream, using a program and system information protocol table belonging to the virtual channel table, determines the type of transmitted channels in a flow method, in particular, by the service location descriptor in the TVCT additional description of the additional information stream represented by the presence or absence, and the information indicates the presence of an additional description about the stream, and transmits the inserted together about the narrative flow annotated words, only by the TVCT, can be distinguished in a transmission channel in multiple streams. 因此,数字TV接收机的用户能够快速地进行流选择。 Thus, the user of the digital TV receiver can be quickly stream selection.

Description

传送流判別方法 The transport stream identification method

本发明涉及通过数字TV的标准规定的ATSC(Advanced Television Systems Committee:先进电視委员会)的PSIP(Program and System Infonnati加Protocol:节目和系统信息协议)方面的内容,特别涉及通过扩充地面波虚拟頻ilUxrvcT沐法结构,只通过TVCT,能够对在频 The present invention relates to the ATSC (Advanced Television Systems Committee: Advanced Television Systems Committee) provided by digital TV standard PSIP: Content (Program and System Infonnati plus Protocol Program and System Information Protocol) aspects, and in particular by expanding virtual ground wave frequency ilUxrvcT Mu law structure, only by the TVCT, the frequency capable of

道内传送的流进行分类的传送流判别方法. 背景狄 The method of determining the transport stream transmitted in the channel flow classifying. Di BACKGROUND

现在,采用数字广^l^一-ATSC涨洛的国家有美国、韩国、加拿大.在上述ATSC规格中,除了对音頻/枧頻编码及解码的^M^进行了定义以外,为了查找希望的頻道,确保能够查找到在頻道内传送的音頻、枧頻,对被称为PSIP的^^进行了定义.上迷PSIP是一种为了观看美国的ATSC团体制定的数字TV,必须传送其所包含的附加信息的规约. Except now, the use of digital wide ^ l ^ a -ATSC countries rose Luo United States, South Korea, Canada. In the ATSC standard, in addition to the audio / soap frequency encoding and decoding ^ M ^ is defined, in order to find the desired channel, ensure audio transmission can find in the channel, the frequency soap, to be called ^^ PSIP were defined. PSIP the fans to watch an American ATSC digital TV groups to develop, it contains must be transferred Statute of additional information.

即,PSIP将EPG(Elcctronic Program Guide:电子节目指南)和SI(System Informttion:系统信息)定义成一个.上述PSIP作为地面广播和无线电统数字广播的ATSC的恥洛,通过MPEG-2(Moving Picture Experts Group; ISO/IEC 13818-1系统)的方法,对没有编码的信息进行分析,为了提供节目的多种信息,进行定义(1997 DEC. document A/65). 即,上述PSDP恥昧以MPEG-2(ISO/IEC13818-l)^洛为基础,在PSIP 中所有的4l^照private section syntox(专用部^4l"法)进行定义.这种PSIP发送/接收按照MPEG-2枧頻和AC-3音频格式制作的A/V数据,为了传送各个电視台的频道信息及各个频道的节目信息等, 由多个^Kl成.而且,上述PSIP具有能够支持逸择頻道,提供希望广播的A/V服务的导航功能和支持广播节目的EPG功能,即,支持广播指南服务的附加功能. That is, PSIP the EPG (Elcctronic Program Guide: EPG) and SI (System Informttion: System Information) is defined as one of the PSIP as the ATSC shame Los terrestrial broadcast and a radio system of digital broadcasting, by MPEG-2 (Moving Picture. Experts Group; ISO / IEC 13818-1 systems) process, no encoding information is analyzed, in order to provide a plurality of program information is defined (1997 DEC document a / 65) That is, the shame PSDP ignorant to MPEG.. -2 (ISO / IEC13818-l) ^ Los basis defined in the PSIP all 4l ^ as private section syntox (specific portion ^ 4l "method). such PSIP transmission / reception frequency in accordance with MPEG-2 and AC soap -3 audio format produced by a / V data, in order to transmit the channel information and program information of each channel of each TV station and the like, into a plurality of ^ Kl. Further, the PSIP can support Yi having select channel, to provide the desired broadcast a / V navigation services and support programs broadcast EPG function, namely, to support additional functionality broadcast guide services.

困1是普通的PSIP结构的示意困. 1 is a schematic trapped trapped PSIP common structure.

进^itit择的頻道信息和进行A/V接收的信息包标识符(PID: Packet Identifier伴信息通过虚拟频iJt^(Viitual Channel Table: VCT)进行传送,各个頻道的电視节目的EPG信息通过EIT(Event Information Table:事件信息表)进行传送.即,如果对上述VCT进行分析,可以知道与頻道名称、频道号码等一起装栽在頻道内的电视节目的音频和视频的PID.除此以外,在上述PSIP中,具有对时间倌息的STT(System Time Table:系统时间表)、节目等级区域及审议机关等信息进行传送的RRT(Rating Region Table:等級区域表).而且,还包括频道及电视节目的附加说明的ETT(Extended Text Table:扩展文本表)、对各个表的版gPID管理的MGT(Master Guide Table:主向导表)。这些表利用被称为段的数据结构进行传送. ^ Itit feed channel selection information and A / V receiver packet identifier (PID: Packet Identifier with information through a virtual frequency iJt ^ (Viitual Channel Table: VCT) is transmitted, the television program through the EPG information of each channel EIT (event information table: event information table) is transmitted that is, if the above analysis of the VCT, can be fitted together and know the channel name, channel number, etc. PID audio and video planted in the television channels of the addition. in the PSIP above, having the STT time groom the information (system time table: system time), program rating information and regional authorities consider like RRT transmission. (rating region table: level region table) further, the channel further comprising ETT and annotated television program (extended text table: extended text table), version of MGT gPID respective management tables: these tables using a data structure called segments (master Guide table primary guide table) is transmitted.

即,上述表4^具有被称为段的基本单位,将一个以上的段组合, 构成一个表. That is, in Table 4 having a substantially ^ units called segments, one or more segments are combined to form a table.

VCT可以划分为256个段.而且, 一个段可以装栽多个虚拟频道倌息, 一个虛拟頻道的倌息不能划分为两个以上的段。 VCT can be divided into 256 sections. Furthermore, a segment can hold a plurality of virtual channels groom planted information, a virtual channel groom interest can not be divided into two or more segments.

困2是A/65里记述的普通地面波用VCT(TVCT)的比特流语法(syntoc)的示意田.即,在基本的VCT中,包含传榆流ID、频道号码(主要,次要)、頻道名称、栽波頻率、节目号码等,追加信息包含在VCT 叙述字中. 2 is a general terrestrial wave are trapped A / 65 described by Lane VCT (the TVCT) bit stream syntax (syntoc) is a schematic field. That is, in the basic VCT, elm stream comprising transmission ID, channel number (major, minor) , channel name, planted wave frequency, program number, etc., contained in the additional information described VCT word.

从困2中我们可以看出,TVCT具有0xC8的表标识符(toble—id), TVCT的PID是OxlFFB. version一number显示VCT的版本值, section—number显示这个段的号码,last一section一n咖ber显示完整的VCT的JL^段的号码.num一channels一in一section指定了在上述VCT段内存在的全部虚拟頻道的个数. We can see from the trapped 2, TVCT having a table identifier (toble-id) 0xC8 is, TVCT the PID is OxlFFB. Version display a version number of the VCT value, section-number show the number of this segment, last a section a n ber coffee show complete the VCT JL ^ .num a segment number channels in a specified number of a section in the above memory section in all VCT virtual channel.

而且,在'for,循环的short_name显示虚拟频道名称, major一channel一aumber显示与虛拟頻道相连的"主要"频道号码,各个虚拟频道号码应该与主要和次要頻道号码连接,主要、次要频道号码可以作为相关虚拟頻道的用户参照号码. Further, in the 'for, a virtual channel loop short_name display name, major aumber a channel display a "primary" channel number and a virtual channel is connected to each virtual channel number to be connected with the major and minor channel numbers, primary, secondary channel as the number of users can reference the relevant virtual channel number.

program— •number是用于连接MPEG-2 PAT(Program Association Table:节目并M)与PMT(Program Map Table:节目映射表)定义的虚拟频道,其与在上述PAT/PMT内的节目号码一致.这里,PAT对每个节目号码,都记迷节目的构成要素,指出传送PMT的传输带信息包的PID.上述PMT记述了构成节目识别号码和节目的視频、音频等个别位列传送的传输信息包的PID明细和附加信息. program- • number for connecting MPEG-2 PAT (Program Association Table: Program and M) and the PMT (Program Map Table: Program Map Table) defined by virtual channel, which is consistent with the program number in the above-described PAT / PMT's. here, the PAT for each program number, are recorded program components fan, indicated with PID of the transport packet transmitting the PMT above PMT describes the program identification number and the configuration program and the video and audio transmitted individually transmitted ranked PID detailed information packet and additional information.

sourcejd显示连接在相关虚拟頻道的节目来源.这里,所谓来源指的是影^象、文本、数据及音响等一个特定来源. sourcejd display program source connected to the relevant virtual channels. Here, the source refers to a specific source ^ like shadow, text, data and audio.

source一id值在传送TVCT的传输流内,具有唯一的值. a source within the transport stream id values ​​transmitted TVCT and has a unique value.

desciiptorjHigth显示相关虛拟頻道的叙述字的整个长度, additionaLdesc^ptor一length显示所有VCT叙述字的整个长度。 desciiptorjHigth full length of the recited word associated virtual channel, additionaLdesc ^ ptor a length VCT full length of all the words recited. 即,上述TVCT通过'for,循环,读取各个虚拟頻道的数据.另一方面,在下一个'for,循环的描述符循环(descriptor loop; That is, the through TVCT 'for, loop, reads the data of each virtual channel on the other hand, in the next.' For, loop descriptor loop (descriptor loop;

descriptor("上,可以包括service location descriptor(月l务定位描述符)、 extended channel name descriptor (扩展頻道名描述符)、time-shifted service descriptor (时间后移服务描述符).这里,值得一提的是,广播节目的視频、音頻PID装栽在service location descriptor里. descriptor ( "on, may include a service location descriptor (May l service location descriptor), extended channel name descriptor (extended channel name descriptor), time-shifted service descriptor after (time shifted service descriptor). Here, it is worth mentioning that video broadcast program, audio PID installed in the plant in service location descriptor.

困3是包含在困2的TVCT中的service location descriptor的比特流语法结构的示意困,在上述service location descriptor上,包括对program一number指示的节目中使用的有效PCR流的PID进行显示的PCR_PID.而且,在'for,循环内,包括各个流(音频、视频及数据) 的类型,显示相关流是通过哪个PID进来的elementar)LPI、语言。 Sleepy 3 comprises a schematic trapped bit syntax structure of the stream service location descriptor in TVCT trapped 2, and on the service location descriptor, comprising an effective PCR streaming program to program a number indicated by the use of the PID displayed PCR_PID Moreover, in the 'for, loop, including the type of each stream (audio, video, and data), which displays PID stream coming through elementar) LPI, language.

而且,由于传送流是0和1的罗列--比特流形态,不能判断传送流到底是音頻、視頻,还是数据.此时,利用上述service location descriptor内的信息,可以区分传送流的种类. Further, since the transport stream list is 0 and l - form of a bit stream, the transport stream can not be determined in the end it is an audio, video, or data at this time, using information in the service location descriptor described above can distinguish the kind of the transport stream.

即,根据上述流类型,能够对传送流进行1次区分,对于相同的流类型,可以利用语言进行2次区分.視频的情况下,由于在ATSC 规格中,规定在一个頻道中只应该存在一个視频,所以,只通过流类型,就能够区^KL頻. That is, according to the stream type can be distinguished on the transport stream 1, for the same stream type can be used to distinguish secondary language. The case of video, since the ATSC specification, should only be present in a predetermined channel a video, therefore, only the flow through type, can be ^ KL frequency region.

但是,在音频的情况下,即使进行了l次区分,2次区分以后,也不能够判别音頻种类的情况时有发生.举例来说,当存在2个语言是korean的音频时,只通过上面提到的流类型和语言,不能够区分上述音频.能够区分上述音頻的方法是利用通过MPEG-2^的PSI(Program Specific Information辨送的PMT的component name descriptor (成分名描述符), Have occurred, however, in the case of audio, even if a distinction l times, 2 times after distinction, not possible to discriminate the type of the audio case. For example, when there are two audio languages ​​korean when only by the above language stream type and method mentioned, can not be distinguished in the audio. can be distinguished by the use of the above-described audio is MPEG-2 ^ a PSI (Program Specific Information sent by the PMT resolution component name descriptor (descriptor component name),

困4是上述component name descriptor的比特流语法的示意图.其可以包含描述的字符串. 4 is a schematic diagram trapped component name descriptor syntax of the bit stream. It may contain a string description.

即,如困5所示,通过在PSIP M的TVCT比特流语法内的service location descriptor和PSI ft^的PMT内定义的流中,查找流类型和PID 相同的流,能够实现TVCT的service location descriptor和PMT的component name descriptor的映射, That is, as shown in FIG. 5 storm, the PMT stream defined by TVCT PSIP M bit stream and service location descriptor in the PSI ft ^ syntax, look for the same stream type and the PID of the stream, can be realized in the service location descriptor TVCT and the component name descriptor of PMT mapping,

首先,对具有相同program一numbcr的TVCT和PAT进行匹配。 First, with the same program and PAT TVCT numbcr of a match. 举例来说,如杲想判别programjiumber是20的TVCT的流,只要与program_number是20的PAT进行匹配就可以.在困5中,从program—number是20的TVCT内的service location descriptor可以看出,流类型是視频的流的PID是0x100.但是,流类型是音频存在两个流ID.即,存在流ID是0x101的音頻和流ID是0x102的音频流。 For example, such determination programjiumber like Gao TVCT 20 is a flow insofar as the program_number is the PAT 20 can be matched. Trapped in 5, from the program-number is within the service location descriptor TVCT 20 can be seen, stream type is a video stream PID is 0x100. However, the presence of two stream type is an audio stream ID. that is, there is an audio stream ID and the stream ID of the audio stream 0x101 to 0x102. 两个音频流语言相同,都是kor.因此,只通过上述TVCT内的service location descriptor,不能够区分两个音频流. Two audio streams in the same language, are KOR. Therefore, only by service location descriptor in the TVCT above, can not distinguish between the two audio streams.

在与上述TVCT进行匹配的PAT (即,program numbef^20)中,插入PMT—PID(例如,0x10).因此,从0xl0的PMT中可以看出,上述PMT一PID包括流类型倌息和PID及田4中显示的component name descriptor.因此,如果分析流类型是音频的component name descriptor, 能够最终区分两个音頻流. (I.e., program numbef ^ 20), the PMT-PID is inserted (e.g., 0x10). Thus, it can be seen from the PMT in the PAT is 0xl0 for matching the TVCT above, the above-mentioned PMT includes a PID and stream type information PID groom component name descriptor field 4 and displayed. Thus, if the analysis of the stream type is an audio component name descriptor, can ultimately differentiate between the two audio streams.

通过这种方法,能够区分具有相同类型、相同语言的流。 By this method, it is possible to distinguish between streams of the same type, the same language. 发明内容 SUMMARY

因此,在上述PS1P规格中,为了这种映射,不仅仅要求接收PSIP 表,同时也要求接收PSI表.即,为了区分在频道内传送的流.应1'$ 既接收TVCT,也接收PAT/PMT.因此,存在数字TV接收机的用为了选择音頻,也需要等待PAT/PMT接收的问題. Therefore, in the PS1P specification, for this mapping, not only required to receive PSIP table, it also requires the receiving PSI table. That is, in order to distinguish the transmitted stream channels should be a '$ both receives the TVCT, also receives the PAT / PMT. Thus, there is a digital TV receiver used for the audio selection, the problem need to wait PMT received PAT /.

为了解决上述问題,本发明的目的是为使用者提供一种扩先包^ 在PSIPAiUfr的TVCT中,传送的service location descriptor, K通过TVCT,能够区分在频道里传送的流的VCT数据结构及传送流判别方法. To solve the above problems, an object of the present invention is to provide an expanded first user packet in TVCT PSIPAiUfr ^ in, service location descriptor transmitted, K through the TVCT, able to distinguish between the data structure and VCT transmission channel in the transmission stream flow identification method.

本发明传送流判别方法的一个实施例包括以下几个阶段,并以此为特征:在VCT的service location descriptor内,插入并传送广播节9 的流类型、elementary一PID、语言信息、表示流的附加说明是否存在的信息,并在所述信息表明关于流的附加说明存在时, 一起插入并传送所述流的附加说明的传送阶段;如果上述信息位指示在service location descriptor内存在关于i/fL的附加说明,则利用上述service location descriptor内的流类型、语言信息及关于流的附加说明,区分在一个顿道里传送的流的种类的接收阶段-上述接收阶段的特征是:如果上述信息位指示在service location descriptor内不存在关于流的附加说明,则只利用上述service location descriptor内的流类型.语言信息,区分在一个频道里传送的流的种类 A transport stream embodiment of the determination method of the present invention includes the following phases, and as characterized: in service location descriptor VCT inserted and transmitting broadcast type throttle 9, a ELEMENTARY the PID, the language information indicating stream whether additional information exists, and when the information indicates the presence of an additional description about the stream is inserted and transported transfer phase annotated with the stream; bit indicates if said information about the memory i / fL at the service location descriptor annotated, the stream type within the service location descriptor, language information, and on additional instructions stream, distinguishing the reception stage type flow a Dayton hang transmitted - wherein the receiving phase is: If the above information bit indicates additional description of the stream does not exist in the service location descriptor, only the stream type within the service location descriptor. language information, to distinguish the type of transmission in a channel in flow

本发明的其他目的、特征及优点将通过附困对实施例的详细说明可以充分理解. Other objects, features and advantages of the invention will be fully understood a detailed description of the embodiments of the attachment trapped.

本发明传送流判别方法通过在TVCT的service location descripu"' 内追加表示流的附加说明是否存在的信息,并在所述信息表明关于流的附加说明存在时, 一起插入并传送所述流的附加说明,只通过TV(T. 能够区分在一个频道里传送的多个流.尤其是,只通过上述TV(T,能够区分流类型、语言相同的流.因此,数字TV接收机的用户能够快速进行流选择' Transport stream is added by the method of the present invention determines the TVCT service location descripu " 'the annotated information whether there is a flow, and the information indicates the presence of annotated on stream, the stream is inserted and transported together with additional description only. able to distinguish between a plurality of streams transmitted by a channel in a TV (T. in particular, only by the above TV (T, can be split type region, the same flow language. Thus, the user of the digital TV receiver to quickly select streaming '

困1是普通的PSIP结构的示意图; 1 is a schematic diagram trapped PSIP common structure;

困2是普通的地面广播用VCT比特流语法结构的示意困: 2 is trapped conventional terrestrial broadcast storm a schematic VCT bitstream syntax structure:

田3是包含在图2的TVCT中的service location descriptor的比特流语法结构的示意困:图4是PSI规格的PMT内定义的component name descriptor的比特流语法结构的示悉图: 3 is a schematic trapped field comprising a bit stream syntax structure in TVCT service location descriptor in FIG. 2: FIG 4 is a diagram showing bit stream syntax structure note the component name descriptor of the PMT PSI defined specifications:

困5是现存TVCT的service location descriptor和PMT映射例子的示意困: 5 is trapped TVCT existing service location descriptor and the PMT maps a schematic example of difficulties:

困6是本发明在TVCT中定义的service location descriptor的比特流语法结构的示意图; 6 is a schematic diagram trapped service location descriptor bit stream syntax structure of the present invention defined in the TVCT;

图7在PSIP 中定义的multiple string structure的比特流语法结构的示意困; FIG 7 schematically trapped syntax structure of a bit stream multiple string structure defined in the PSIP;

图8是本发明只使用TVCT的service location descriptor,判断流种类的例子的示意图; FIG 8 that the present invention only the TVCT service location descriptor, a schematic view of an example of the stream type is determined;

图9是本发明中进行流判别的数字TV接收系统的概略示意图附图主要部分符号说明 9 is a schematic of a digital TV receiving system of the present invention determines streaming in a main part schematic drawings SIGNS LIST

110:调谐器120:TP多路信号分离部 110: tuner 120: TP demultiplexer section

130 :音频解码器140 :視頻解码器 130: audio decoder 140: video decoder

150 : PSIP解码器160 : PSI解码器贝'^"实^fe方式 150: PSIP decoder 160: PSI decoder shell '^' ^ Fe real mode

下面,将参照附困对本发明实施例的结构和作用加以说明.依据附困说明的本发明的结构和作用仅仅作为一个实施例进M明,而本发明的上述净支术思想和核心构成及作用并不局限于此. Next, with reference to attached trapped structure and operation of the embodiment of the present invention will be described. Depending on the structure and function of the present invention attached trapped described merely as an embodiment into M Ming embodiment, and said net branched surgery idea and core of the invention is constituted and effect is not limited to this.

困6是本发明在TVCT中定义的service location descriptor的比特流语法结构的示意田. 6 is a schematic trapped field in the syntax structure of the present invention is defined in the service location descriptor TVCT bitstream.

本发明的service location descriptor与现存的service location descriptor的不同点是:除了流类型、PID、语言以外,在elementary streamloop上还il^ 了stream—desc和component一name一string(). service location descriptor according to the present invention differs from the existing service location descriptor is: In addition to the type of stream, PID, language, also on the elementary streamloop the stream-desc il ^ a component name and a string ().

即,将未使用城(reserved)由3位缩小到2位,在剩余的1位里分配stream_desc.上述stream一desc是显示是否存在关于流的附加说明(component name string)的1位标记(bit flag).这里,值得一提的是,1 位是一个实施例,也可以全部分配未使用域的2位及3位,来表示流的附加说明(component一name一string)是否存在- That is, the unused City (Reserved) reduced from three to two, dispensing stream_desc remaining 1 in. Above stream a desc is a graph showing whether there is a marker on the annotated stream (component name string) in (bit . flag) here, it is worth mentioning that one embodiment is one embodiment, may be assigned all unused domain 2 and 3, annotated to indicate stream (component a a name string) whether there -

上述5|>»的component一name一string()具有多串结构(multiple string structure)的形态.即,如果流的附加说明(component一n咖e一string)包含在上述service location descriptor中,上述stre咖一desc是1 ,如果不包含在上述service location descriptor中,stream—desc是0. Above 5 |.> »Of component a name a string () form having a multi-string structure (multiple string structure), i.e., if the annotated stream (component a n coffee e a string) included in the service location descriptor in the 1 is a coffee stre desc, if not included in the service location descriptor in, stream-desc is 0.

因此,判別接收的比特流的种类时,如果上述stream一desc是1, 利用';充类型和etementary一PID及component一name一string()进行爭J别.而且,如果上迷stream—desc是0,由于不存在c啦pon節t一name一string(), 只利用流类型和elem幼tary一PID进行判别,如困7所示,上述component一nanie一string()与PMT的component name descriptor—样,具有在PSIP中定义的多串结构的形态. Thus, when determining the type of the bit stream received, if the above-described stream a desc 1, using '; charging type and etementary a PID and a component a name a string () contend J Do Further, if the above-stream-desc Yes. 0, since it does not exist pon section c a t a name string (), only the stream type and PID elem a juvenile tary discriminated as trapped 7, the above-described component a nanie a string () and a PMT descriptor component name - like, a multi-string structure has a morphology defined in the PSIP.

原来传送TVCT的理由是提供頻道的信息.但是,在本发明中, 传送TVCT是为了快速调谐,扩充TVCT内的service location descriptor.即,通it^ TVCT的service location descriptor中il^口PMT 里定义的component name string,不用全部接收TVCT和PAT/PMT, 只通过TVCT,能够区分在频道内传送的多个流.因此,当数字TV接#的用户想要观看特定电視节目时,能够快速调谐. Reason for the original transmission TVCT to provide information on the channel. However, in the present invention, the transmission TVCT for fast tuning, extension service location descriptor in the TVCT. That is, service location descriptor through it ^ TVCT in il ^ port PMT defined in the component name string, not all receivers TVCT and PAT / PMT, only by TVCT possible to distinguish a plurality of streams transmitted in the channel. Thus, the digital TV when the user wants to view contact # of a particular television program, fast tuning .

困8是本发明只使用TVCT的service location descriptor,判断流种类的例子的示意困. 8 is trapped TVCT of the present invention only service location descriptor, determining the type of an example of a schematic flow difficulties.

从图8的(a)的TVCT来看,在一个频率内存在两个频道(ll-l, 11-2).而且,如^Mt 11-1频道的service location descriptor进行分析, 从图8的(b)中我们可以看出,其存在3个流.而且,根据流类型的域值,能够判断第一个流是视频,第二个流、第三个流是音频.此时, 音频流的语言值^P是korean,因此,在现存PSIP规格中,在这种情况下,只通过TVCT,能够区分两个音频流.即,接收PAT/PMT后, 通过分4斤component name descriptor,能够区分频道内的两个音频。 , And a frequency memory, such as service location descriptor ^ Mt 11-1 analyzed channel two channels (ll-l, 11-2). TVCT from FIG. 8 (a) view from FIG. 8 (b) we can see that there are three streams. Furthermore, according to stream type field value can be determined is the first video stream, second stream, third stream is an audio. At this time, the audio stream after the language is korean ^ P value, thus, in the existing PSIP specification, in this case, only through the TVCT, two audio streams can be distinguished. That is, the received PAT / PMT, divided by 4 pounds component name descriptor, can be distinguish within two audio channels.

但是,在本发明中,如困8所示,通过只接收TVCT,就能够区分频道内的两个音频.即,如果分析困7的component name string,就能够区分具有相同流类型、语言的流. However, in the present invention, as shown in FIG. 8 trapped by receiving only the TVCT, it is possible to distinguish between the two audio channels. That is, if the analysis of the trapped component name string 7, it is possible to distinguish streams with the same stream type languages .

因此,本发明通过音頻/視頻PID,在画面上显示相关内容后,能够马上通知用户存在多个音頻. Accordingly, the present invention is the audio / video the PID, the content displayed on the screen, a plurality of audio can be immediately notify the user.

困9是本发明中进行流判別的数字TV接收系统的概略困.在困9中,调谐器110只调谐特定頻道的RF信号,以TP(Transport stream:传输流)形态检^,向TP多路信号分离部120输出.上述TP多路信号分离部120利用多路复用的TP的PID,分离音频和视频及PSIP、 PSI信息后,分别向各自的解码器130、 140、 150、 160输出。 Trapped 9 is a schematic trapped digital TV receiving system streaming is determined according to the invention in a sleepy 9, the tuner 110 of the RF signal tuned specific channel to TP. (Transport stream: a transport stream) form the subject ^ to TP multiple after separation unit 120 outputs signals above TP demultiplexer unit 120 using the PID TP multiplexed, the audio and video separation and PSIP, PSI information, respectively, 130, 140, 150, 160 to the respective outputs of the decoder . 然后,上述TP多路倌号分离部120从PSIP解码器150接收音频/视频PID选择信号,分离音頻和視频比特流. Then, the above-described TP multiplex separation portion groom No. 120 / video PID selection signal received from the audio PSIP decoder 150, separating the audio and video bitstreams.

上述音頻解码器130对输入的音频比特流,适用已设定的音频解码算法,复原成原来的音频倌号;視頻解码器140对输入的視频比特流适用已设定的視頻解码算法,复原成原来的视频信号。 Said audio decoder 130 to the input audio bitstream for the set audio decoding algorithm, groom restored to the original audio signal; video decoding algorithm video bitstream decoder 140 applies the video input has been set, rehabilitation to the original video signal. 上述PSIP解码器从输入的PSIP信息中分析各个表,进行解码.此时,当判别传送流的秤类时,如困8所示,可以只参照TVCT内的service location descriptor,区分在一个頻道内传送的多个流. Above PSIP decoder analyzes each table in the PSIP information input, decodes this time, when the scale is determined based transport stream, as shown trapped 8, reference can only service location descriptor in the TVCT, distinguished in a channel a plurality of transport streams.

普通的数字TV接4t^在頻道调谐后,为了尽快将调谐的频道的内M供给用户,需要最先接收TVCT.原因是,数字TV调谐后到看到画面所花费的时间比模拟电枧长好几倍. Conventional digital TV connected to 4t ^ after channel tuning, M supplied to the user as soon as possible to tune the channel, the first receiver needs TVCT. The reason is that, after the digital TV tuner of the screen to see the time takes longer than analog soap several times.

通过利用本发明的service location descriptor,用户能够快速地选择希望的音频.即,为了进行音频选择,不需要等待PAT/PMT接收,由于只通过TVCT,能够区分在一个頻道内传送的音频流,在最短的时间内能够接收到用户的选择. By using the service location descriptor according to the present invention, the user can quickly select the desired audio. That is, for the audio selection, without waiting PAT / PMT received, since only by the TVCT, audio streams can be distinguished in a transmission channel, in the shortest possible time can receive the user's selection.

通过上述的说明内容,相关工作人员完全可以在不偏离本项发明技术思想的范闺内,进行多样的变更以及修改. Content within the above description, the relevant staff can without departing from the technical idea of ​​the present invention of the scope Gui performs various changes and modifications.

因此,本項发明的技术性范围并不局限于说明书上的内容,必须要根据权利范圃来确定其技术性范围. Accordingly, the technical scope of the present invention is not limited to the content item on the instructions, it is necessary to determine the scope of the technical scope according Po.

Claims (6)

1、 一种传送流判别方法,是利用属于节目及系统信息协议的表中的虚拟频道表,判断在一个频道中传送的流的种类的方法,其包括: 在VCT中的service location descriptor内一起插入并传送广播节目的流类型、elementary_PID、语言信息和表示所述流的附加说明是否存在的信息;并在所述信息表明关于流的附加说明存在时,一起插入并传送所述流的附加说明的传送阶段; 根据表示所述流的附加说明是否存在的信息,利用包含在上述VCT里的流类型、语言信息及关于流的附加说明,区分在一个频道里传送的流的种类的接收阶段。 1. A method for determining transport stream, using the program and system information tables that belong to the virtual channel protocol table, determines the type of transmitted channels in a stream, comprising: with the service location descriptor in the VCT stream type is inserted and transmitted broadcast program, elementary_PID, language information and information indicating whether the additional description of the flow present; and when the information indicates the presence of an additional description about the stream, the transport stream with inserted and annotated the transfer phase; according to the instructions represented by said information adding stream exists, the stream type included in the VCT in the language, and information on additional streams is described, distinguishing the kind of the received phase of transmitted in a channel in the flow.
2、 如权利要求1所述的传送流判別方法,其特征是:上述传送阶段就是通过信息位分配未使用域的位,表示关于流的附加说明是否存在. 2, the transport stream as claimed in discriminating method according to claim 1, wherein: said transmission phase information by bit allocation is unused bit field indicating Additional Remarks stream exists.
3、 如权利要求1所述的传送流判別方法,其特征是:上述接收阶段就是如果上述信息指示在service location descriptor 内存在关于流的附加说明,则利用在上述service location descriptor内的流类型、语言信息及关于流的附加说明,区分在一个频道里传送的流的种类. 3, the transport stream as claimed in discriminating method according to claim 1, wherein: the receiving phase if said information indicates that the additional service location descriptor in the memory of the description of the stream, the stream type in said service location descriptor use, language information and additional instructions on stream, to distinguish the type of flow in a channel of transmission in.
4、 如权利要求1所述的传送流判别方法,其特征是:上述接收阶段就是如果上述信息指示在service location descriptor 内不存在关于流的附加说明,则只利用上述service location descriptor 内的流类型、语言信息,区分在一个頻道里传送的流的种类. 4, the transport stream as claimed in discriminating method according to claim 1, characterized in that: if the receiving stage is the above description of the additional information indicates that the stream does not exist in the service location descriptor, only the stream type within the service location descriptor , language information, to distinguish the type of flow in a channel of transmission in.
5、 如权利要求1所述的传送流判别方法,其特征是: 上述流的附加说明具有在PSIP中定义的多串结构的形态. 5, the transport stream as claimed discriminating method according to claim 1, wherein: said additional description of a multiple stream having a string structure defined in the PSIP.
6、 如权利要求3所述的传送流判别方法,其特征是:上述传送阶段就是通过信息位分配未使用域的位,表示关于流的附加说明是否存在. 6, the transport stream as claimed in claim 3 discriminating method, wherein: said transmission phase information by bit allocation is unused bit field indicating Additional Remarks stream exists.
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