CN1918911A - Apparatus and method for transforming a digital TV broadcasting signal to a digital radio broadcasting signal - Google Patents
Apparatus and method for transforming a digital TV broadcasting signal to a digital radio broadcasting signal Download PDFInfo
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- CN1918911A CN1918911A CNA2004800418820A CN200480041882A CN1918911A CN 1918911 A CN1918911 A CN 1918911A CN A2004800418820 A CNA2004800418820 A CN A2004800418820A CN 200480041882 A CN200480041882 A CN 200480041882A CN 1918911 A CN1918911 A CN 1918911A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
- H04H60/02—Arrangements for generating broadcast information; Arrangements for generating broadcast-related information with a direct linking to broadcast information or to broadcast space-time; Arrangements for simultaneous generation of broadcast information and broadcast-related information
- H04H60/07—Arrangements for generating broadcast information; Arrangements for generating broadcast-related information with a direct linking to broadcast information or to broadcast space-time; Arrangements for simultaneous generation of broadcast information and broadcast-related information characterised by processes or methods for the generation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/86—Arrangements characterised by the broadcast information itself
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Abstract
The present invention relates to an apparatus for transforming digital TV broadcasting signals into digital radio broadcasting signals and a method thereof. The apparatus includes: a transport stream generator for transforming TV broadcasting signals outputted from outside into digital TV broadcasting transport streams; a broadcasting transport format transformer for generating digital radio broadcasting transport streams by transforming the digital TV broadcasting transport streams in conformity to a digital radio broadcasting transport protocol based on a radio broadcasting schedule; a digital radio broadcasting multiplexer for multiplexing the generated digital radio broadcasting transport streams generated in the broadcasting transport format transformer; a modulating/up-converting unit for modulating the multiplexed digital radio broadcasting transport streams in a modulation method of digital radio broadcasting and up-converting frequencies of the modulated radio broadcasting signals into radio frequency (RF) signals; and a high-power amplifier for amplifying and transmitting the up-converted RF signals through a transmitting antenna.
Description
Technical field
The present invention relates to Digital Television (TV) broadcast singal is converted to the devices and methods therefor of digital radio broadcasting signal; More specifically, the present invention relates to broadcast singal conversion equipment and method thereof, be used for according to new radio broadcasting plan information from keeper's transmission, according to digital video broadcast protocol, the transport stream of converting digital TV (TV) broadcasting, for example information on services, audio/video transport stream and data transmission stream.
Background technology
Current commercialization digital radio broadcasting or DMB provide the multimedia service that comprises the video that is different from audio service.
Provide the method producer to make content according to the existing radio broadcast service, and content is offered the service supplier, by dedicated network content is offered digital radio broadcasting then and send Network Provider by dedicated network.Have following problem herein: making content increases with the cost that uses network.
Promptly, in conventional radio broadcasting transmitter, broadcasted content by serviced component supplier, be that the broadcasted content producer makes, and send to the service supplier by dedicated network with the form of unique serviced component coffret, offer Digital Audio Transmission Network Provider by dedicated network from the service supplier then.Thus, need producer, service supplier and Network Provider that digital radio broadcasting is provided, and should between them, set up network with supplying content constantly.For this reason, always need to make content and the cost that uses network.Especially for short of money relatively local digital radio broadcast service supplier, the cost problem is even more serious.
Simultaneously, in digital radio broadcasting even more important relatively concerning local service is provided, the utmost point need provide the high-quality multimedia service with relatively low cost.
At present, use relative satellite, cable, surface wave Digital Television (TV) broadcasting and satellite multimedia service that the high-quality multimedia service is provided than broadband, and because the service coverage rate is guaranteed, so do not wish not use widely quality digital TV content.
Summary of the invention
Technical problem
Therefore, the object of the present invention is to provide a kind of broadcast singal conversion equipment and method thereof, be used for according to the transport stream of coming converting digital TV (TV) broadcasting from the new radio broadcasting plan information of keeper's transmission according to digital video broadcast protocol, for example information on services, audio/video transport stream and data transmission stream, reduce the cost of the making digital radio broadcasting content of separating thus, and use existing quality digital TV broadcasted content.
Technical scheme
According to an aspect of the present invention, a kind of broadcast singal conversion equipment is provided, be used for Digital Television (TV) broadcast singal is converted to digital radio broadcasting signal, comprise: the transport stream maker, the TV broadcast singal that is used for receiving and will importing from the external world be converted to the digital TV broadcasting transport stream; The broadcasting transport format transducer is used for according to the digital radio broadcasting host-host protocol, converting digital TV broadcast transmission stream, and, generate the digital radio broadcasting transport stream based on the radio broadcasting plan; Digital radio broadcasting multiplexer is used for the multiplexing digital radio broadcasting transport stream that generates in the broadcasting transport format transducer; Modulation/up-conversion unit is used for modulator approach according to digital radio broadcasting, is modulated at digital radio broadcasting transport stream multiplexing in the digital radio broadcasting multiplexer, and will be radio frequency (RF) signal through the frequency upconversion of the radio signals of ovennodulation; And high power amplifier, be used for amplifying modulation and the RF signal of up-conversion acquisition, the RF signal that amplifies by transmitting antenna transmission process thus from modulation/up-conversion unit.
In addition, according to an aspect of the present invention, the broadcasting transport format transducer also comprises: memory, be used for storing digital radio broadcasting data flow, from the digital radio broadcasting SI stream of taking transport stream again and rotating transmitter output from digital radio broadcasting SI of transmission re-multiplexer output from the output of broadcasting format transducer.
According to an aspect of the present invention, provide a kind of broadcast singal conversion method, be used for Digital Television (TV) broadcast singal is converted to digital radio broadcasting signal, comprised following steps: conversion TV (TV) broadcast singal is the digital TV broadcasting transport stream; Based on the radio broadcasting plan,, generate the digital radio broadcasting transport stream by according to digital radio broadcasting transport protocol conversion digital TV broadcasting transport stream; Generate transport stream; The multiplexing digital radio broadcasting transport stream that generates; According to the modulator approach of digital radio broadcasting, the digital radio broadcasting transport stream of modulation multiplex; To be radio frequency (RF) signal through the frequency upconversion of the radio signals of ovennodulation; And amplify and send through the RF of ovennodulation and up-conversion signal.
Description of drawings
From description of preferred embodiments below in conjunction with accompanying drawing, can know above and other purposes and feature of the present invention, wherein:
Fig. 1 for show according to the embodiment of the invention, to be used for Digital Television (TV) conversion of signals be the block diagram of the broadcast singal conversion equipment of digital radio broadcasting signal;
Fig. 2 is for describing the block diagram according to the digital radio broadcasting transformat conversion block embodiment of the invention, Fig. 1;
Fig. 3 is for describing the block diagram according to the data broadcasting format conversion unit embodiment of the invention, Fig. 2;
Fig. 4 illustrates demonstration according to the data broadcasting format conversion method in the data broadcasting format conversion unit embodiment of the invention, Fig. 2;
Fig. 5 illustrates demonstration according to the SI information decoding embodiment of the invention, Fig. 2 unit;
Fig. 6 illustrates according to the digital radio broadcasting SI generation method in the digital radio broadcasting SI generation unit embodiment of the invention, Fig. 2;
Fig. 7 for describe according to the embodiment of the invention, to be used for the digital TV broadcasting conversion of signals be the flow chart of the broadcast singal conversion method of digital radio broadcasting signal.
Embodiment
With reference to description accompanying drawing,, can know other purposes of the present invention and aspect from following to embodiment.In addition, if think and to blur main points of the present invention, then omit this detailed description to the detailed description of prior art.After this, describe the preferred embodiments of the present invention in detail with reference to accompanying drawing.
Fig. 1 for show according to the embodiment of the invention, to be used for Digital Television (TV) conversion of signals be the block diagram of the broadcast singal conversion equipment of digital radio broadcasting signal.
When exporting when the digital TV broadcasting signal of a plurality of tuners 102 specific channel of selection Digital Television (TV) broadcast singal of importing from cable 101 and reception antenna 100 and with its form with intermediate frequency (IF) analog broadcast signal, baseband processor 103 is converted to digital broadcast transmission stream (TS) by digitlization IF analog broadcast signal and demodulation with the analog broadcast signal of importing.
Simultaneously, conversion of signals piece 105 will be the digital TV broadcasting transport stream by the digital TV broadcasting conversion of signals of privately owned circuit 104 inputs of radio network.
Herein, the digital TV broadcasting transport stream is represented moving picture expert group 2 (MPEG-2) transport stream, and it comprises audio/video (A/V) data, datacast data and information on services (SI).
From the digital TV broadcasting signal of the external world, the digital TV broadcasting signal of Advanced Television Systems Committee (ATSC), the digital TV broadcasting signal of digital video broadcasting (DVB) and the digital TV broadcasting signal of open cable method are arranged by cable, reception antenna and the input of privately owned circuit.
Herein, the digital TV broadcasting signal of ATSC comprises: the satellite digital TV broadcast singal of the surface wave digital TV broadcasting signal of ATSC, the digital cable TV broadcast singal of ATSC and ATSC.Simultaneously, the digital TV broadcasting signal of DVB comprises: the satellite digital TV broadcast singal of the terrestrial digital TV broadcast singal of DVB, the cable digital TV broadcasting signal of DVB and DVB.
Simultaneously, digital radio broadcasting transformat conversion block 106 is converted to digital radio broadcasting form (referring to Fig. 2) with digital TV broadcasting transport stream (its mpeg 2 transport stream for exporting from baseband processor 103 and digital signal conversion block 105).
Subsequently, when modulation and up-conversion block 108 according to digital radio broadcasting modulator approach modulation multiplexing data and when it is up-converted to radio frequency (RF) signal, the signal that high power amplifier 109 amplifies through ovennodulation and up-conversion, and by transmitting antenna 110 emission amplifying signals.
After this, the operation of broadcast singal conversion equipment of the present invention is described.
By reception antenna 100 and cable 101 or privately owned circuit 104, receive a plurality of digital TV broadcasting signals, and be converted into a plurality of digital broadcast transmission streams by tuner 102, baseband processor 103 and conversion of signals piece 105.Then, send it to digital radio broadcasting transformat conversion block 106 (referring to Fig. 2).
Digital radio broadcasting transformat conversion block 106 is according to keeper's program plan, automatically the digital broadcast transmission circulation of receiving is changed to information on services (SI), audio/video (A/V) information and the data message that meets the digital radio broadcasting form, and sends it to digital radio broadcasting multiplexing 107.
Then, the stream of multiplexing 107 multiplexing input of digital radio broadcasting, i.e. SI, AV information and data message.
In modulation and up-conversion block 108, multiplexing transport stream is modulated to analog intermediate frequency (IF) signal, and up-converts to the RF signal.Then, it is amplified by high power amplifier 109, and by transmitting antenna 110 emissions.By above processing, carry out digital radio broadcasting.
Fig. 2 is for describing the block diagram according to the digital radio broadcasting transformat conversion block embodiment of the invention, Fig. 1.It shows following the processing: according to the radio broadcasting plan, and according to the radio broadcasting host-host protocol, converting digital TV broadcast transmission stream, and generate the digital radio broadcasting transport stream.
Transmission demultiplexing piece 201 is SI transport stream, A/V data transmission stream and data transmission stream with the digital TV broadcasting transmission flow demultiplexing of receiving.
Interface unit 204 is created on the packet identifier (PID) of the program that comprises in radio broadcasting plan and the program configuration information (such as multiplexing configuration information (MCI) configuration information and label information) according to from the digital TV broadcasting SI analytical information of SI decoder 202 inputs and the radio broadcasting plan of keeper's input.
Promptly, interface unit 204 generates the program packet identifier about the digital radio broadcasting program according to coming Program Association Table (PAT) from the digital TV broadcasting SI analytical information that SI decoder 202 transmits based on the radio broadcasting plan about the selected broadcast program of keeper.
Digital radio broadcasting SI maker 210 reconfigures the information on services of digital radio broadcasting according to from the digital TV broadcasting information on services of SI decoder 202 transmission and the program configuration information that transmits from scheduler 203.
MPEG-2 PSI maker 211 defines the peculiar information of MPEG-2 program (PSI) according to the information on services that reconfigures in digital radio broadcasting SI maker 210, and sends it to transmission re-multiplexer 209.
Digital radio broadcasting SI rotates reflector 212 according to the method for rotating, and periodically is transmitted in the information on services that reconfigures in the digital radio broadcasting SI maker 210.
A/V transport stream filter 205 is according to the packet identifier that transmits from scheduler 203, from the A/V transport stream of transmission demultiplexing piece 201 outputs, only separate corresponding to the A/V transport stream of packet identifier and based on the packet identifier that is sent from scheduler 203 sending the A/V transport stream to transmission re-multiplexer 209.Packet identifier is at the program about new radio broadcasting plan in the digital TV broadcasting program herein.
The output signal of A/V code converter 206 conversion A/V transport stream filter 205, it comprises the definition to video/audio, data bit-rate and compression method.
That is, about the radio broadcast program of establishing in scheduler 203, A/V code converter 206 is carried out following function: the MPEG-2 stream that the MPEG-2 circulation is changed to data bit-rate, definition and the screen size established in interface unit 204.Under the situation of only changing audio broadcasting, it carries out following function: the compressed format that the MPEG-2 audio stream is converted to digital audio broadcasting.
From the data transmission stream of transmission demultiplexing piece 201 outputs, transfer of data flow filter 207 is according to the packet identifier that transmits from scheduler 203, only separate data transmission stream, and send this data transmission stream to transmission re-multiplexer 209 by A/V code converter 206 corresponding to packet identifier.
Data broadcasting format converter 208 will be reconfigured for the digital radio broadcasting data transmission stream that meets the digital radio broadcasting host-host protocol from the digital TV broadcasting data transmission stream of transfer of data flow filter 207 outputs, and send the digital radio broadcasting data transmission stream that reconfigures according to the method for rotating.
The multiplexing again a plurality of transport stream of transmission re-multiplexer 209.That is, its multiplexing A/V transport stream from A/V code converter 206 output, from the data transmission stream of data broadcasting format converter 208 outputs and from the MPEG-2 PSI of MPEG-2 PSI maker 211 outputs.Can come again multiplexing A/V transport stream by only extracting audio transport stream packet herein, according to control signal from scheduler 203.
Storage 213 storages are from the digital radio broadcasting data flow of data broadcasting format converter 208 outputs, from the multiplexing transport stream again of transmission re-multiplexer 209 outputs and the digital radio broadcasting SI stream of rotating reflector 212 outputs from digital radio broadcasting SI.According to control signal from scheduler 203, the stream stored of output, this control signal be based on 204 that import by interface unit, from the control signal of keeper's request.
Fig. 3 is for describing the block diagram according to the data broadcasting format conversion unit embodiment of the invention, Fig. 2, and Fig. 4 is for showing the diagram according to the data broadcasting format conversion method in the data broadcasting format conversion unit embodiment of the invention, Fig. 2.
Sections in digital storage media command and the control therein (DSM-CC) is used for the data, services of digital TV broadcasting, with respect to based on the data broadcast program of selecting from the control signal (it is a packet identifier information) of scheduler 203, data broadcasting format converter 208 is carried out following function: the data download protocol is converted to multimedia object transmits (MOT) agreement.
With reference to Fig. 4, the at first simple method that the data download protocol is converted to digital radio broadcasting MOT agreement of describing.
As shown in Figure 4, " moduleInfoBytes " field value of each module of storage in download message indication (DII) message, this message transmits by the DSM-CC sections, and the distribution MOT object the same with number of modules.
Because the MOT object that distributes is distinguished by the transmission identifier (TransportId) of digital radio broadcasting master service channel (MSC) data set, so " moduleInfoBytes " value that will store in advance is assigned as " TransportId " value.
With distinguishing " GroupId " field that " TransportId " value in the DII message of each data set is input to the MOT object header, thus according to a plurality of MOT agreements of " GroupId " differentiation.
In addition, " blockSize " value of expression block size value is input to " BodySize " field of MOT object header in the DII message, distributes thus and the identical MOT object fragments of downloading data block (DDB) size.
Be described in the method that is converted to Eureka-147 digital radio broadcasting MOT agreement under the situation based on the digital radio broadcasting of Eureka-147, with digital TV broadcasting data download protocol with reference to Fig. 3 and 4 herein.
Data broadcasting format converter 208 will be converted to the digital radio broadcasting Data Transport Protocol according to the data download protocol of the data broadcast program of selecting from the control signal (it is a packet identifier) of scheduler 203.
When the transmission receiving element 301 of data broadcasting format converter 208 received a plurality of digital TV broadcasting data transmission stream 401 to 405, transmission sections decoder 302 separated the digital TV broadcasting transport stream of receiving by sections.Then, transmission sections decoder 302 is by removing unnecessary information from the sections that is separated, promptly by only extracting necessary information, generate DII message 421 and a plurality of DBB 422,423, and transmission sections decoder 302 is separated into header information piece (for the DII piece among Fig. 4) and data block 422,423 (for the DDB piece among Fig. 4) with the DII message 421 that generates with DBB 422,423.Herein, generation DII message 421 is as follows with the process of DBB 422,423.By from DII sections 411, removing the information that is different from module information (" moduleInfoBytes "), block size (" blockSize ") and transaction identifier (" transactionId "), generate DII message 421.By from DBB 422,423, removing " link information when passing through a plurality of mpeg transport streams of combination ", generate the DBB piece 422,423 that comprises real data with generation DDB sections.
In header information analysis and converting unit 303, analyze the digital TV broadcasting header information, and be converted into the header information of digital radio broadcasting host-host protocol.Promptly, module information in the header information of DII message 421 (" moduleInfoBytes ") data are assigned to transmission identifier (" the TransportId ") data in the Eureka-147 digital radio data broadcasting, and transaction identifier (" TransactionId ") data are assigned to group identifier (" the GroupId ") data in the Eureka-147 digital radio data broadcasting, and block size (" blockSize ") data are assigned to main body size (" the BodySize ") data in the Eureka-147 digital radio data broadcasting.
Therefore, main body size (" BodySize ") data are comprised in the head core 431, group identifier (" GroupId ") data are comprised in the extended head 432, and transmission identifier (" TransportId ") data are comprised in (see figure 4) in session header 452 and 472.
By data block converting unit 304, will be converted to the data block 433 and 434 (it is the body segment among Fig. 4) of digital radio broadcasting host-host protocol as the data block 422 and 423 of DDB among Fig. 4.
After this, it is the header information and the data block of digital radio broadcasting data transmission stream that digital radio broadcasting data transmission format encoder 305 reconfigures by the digital radio broadcasting transport protocol conversion, and according to rotating sending method by transmission re-multiplexer 209 output digital radio broadcasting data transmission streams.
Herein, the following step that is reconfigured for the digital radio broadcasting data.
Each head core 431 is connected with extended head 432, for having a segmentation 442 of corresponding heads 441 (it is the segmentation head), form MSC data set data field 453 thus, and, form the MSC data set thus and connect MSC data set data field and session header 452 (it is for having the part of " TransportId " field value), MSC data set head 451 and cyclic redundancy check sign indicating number (CRC) 454 (it is error detection code).
Each body segment 433 and 434 is connected to a segmentation 462 of corresponding heads 461 (it is the segmentation head), form MSC data set data field 473 thus, and MSC data set data field 473 is connected with session header 472 (it is for having the part of " TransportId " field value), MSC data set head 471 and CRC 474, forms another MSC data set thus.
In Fig. 4, because generate the MSC data set, so symbiosis becomes four MSC data sets in Fig. 4 with respect to each head core 431, extended head 432 and body segment 433,434.
Fig. 5 is for showing the diagram according to the SI information decoding embodiment of the invention, Fig. 2 unit.
As shown in Figure 5, SI decoder 202 comprises: mpeg 2 transport stream table filter 501, table database 502 and information on services extracting unit 503.
501 information on services from 201 inputs of transmission demultiplexing piece of mpeg 2 transport stream table filter extract table information, and will show information stores in table database 502 from information on services.Herein, table information comprises: Program Association Table (PAT), conditional access table (CAT), Program Map Table (PMT), main guide tab (MGT), system time table (STT), TV virtual channel table (TVCT), stepped zone table (RRT) and Event Information Table (EIT).
Information on services extracting unit 503 extracts information on services from the table information that is extracted, such as transport stream identification symbol, program number, unified time coordinated time information, program source identifier, event ID, local time started of program, program length and program title.
Fig. 6 is for describing the diagram according to the digital radio broadcasting SI generation method in the digital radio broadcasting SI generation unit embodiment of the invention, Fig. 2.It has been described ATSC surface wave information on services has been converted to method based on the digital radio broadcasting information on services of Eureka-147.Herein, the information on services that conversion is extracted in SI decoder 202 generates the digital radio broadcasting information on services thus.
In step 601, directly be converted to the UTC time of " fast information group (FIG) class 0 expansion class 1 " (after this it being abbreviated as FIG 0/1) the UTC time in the system time table (STT).
In step 602,, directly be converted into the new service identifier (" SId ") of FIG class 0 expansion class 16 (FIG 0/16) by program source identifier and the event ID of combination TVCT.Represent that " NewSId1 " of next Sid is identical with " Sid2 " herein.
In step 603 and 604, local time started of the program in the Event Information Table (EIT) and program length are converted to the program number (PNum with newly PNum) of " FIG 0/16 ".Simultaneously, in step 605, the program title in the Event Information Table directly is converted to the characteristics field of " FIG 1/5 ".Herein, though do not show mapping relations among Fig. 6,, " Sid1 " of " FIG 0/5 ", " Sid2 " and " SIdN " are mapped as the program source identifier of TVCT and the combination of event ID, i.e. " source id+ incident id 1 ".
Simultaneously, according to the Eureka-147 agreement, by reconfiguring the program configuration information that sends from scheduler 203, generate other digital radio broadcasting information on services except that the UTC that will in " FIG 0/1 ", " FIG 0/16 " and " FIG 0/5 ", store, service identifier, program number (PNum and new PNum) and characteristics field.
Briefly, by reconfigure the program configuration information that sends from scheduler 203 according to the Eureka-147 agreement, the information on services that generation will be stored in " FIG 0/0 ", " FIG 0/2 ", " FIG 0/3 " and " FIG 0/8 " about the MCI configuration, the information on services that will in " FIG 1/0 " and " FIG 1/4 ", store about label, the information on services that in other " FIG 0/10 " and " FIG 0/16 ", store about the program configuration.
Fig. 7 for describe according to the embodiment of the invention, to be used for the digital TV broadcasting conversion of signals be the flow chart of the broadcast singal conversion method of digital radio broadcasting signal.
Because with it is that to be used for the digital TV broadcasting conversion of signals be that the broadcast singal conversion equipment of digital radio broadcasting signal is described, so after this only describe the general broadcast signal conversion method.
In step 701, being used for the digital TV broadcasting conversion of signals is that the broadcast singal conversion equipment of digital radio broadcasting signal receives and will be converted to the digital TV broadcasting transport stream from the TV broadcast singal of external world's input.In step 702, the broadcast singal conversion equipment is according to the radio broadcasting plan information, and according to the digital video broadcasting host-host protocol, converting digital TV broadcast transmission stream generates the digital video broadcasting transport stream thus.
Subsequently, in step 703, the multiplexing above digital video broadcasting transport stream that generates of broadcast singal conversion equipment, and in step 704, according to the digital radio broadcasting modulator approach, modulation multiplexing digital radio broadcasting transport stream, and be radio frequency (RF) signal with the frequency upconversion of the radio signals modulated.
In step 705, the amplification of broadcast singal conversion equipment sends it through the RF of ovennodulation and up-conversion signal and by transmitting antenna.
The invention described above method can be implemented as program, and is stored in the computer readable recording medium storing program for performing, for example CD-ROM, RAM, ROM, floppy disk, hard disk and magneto optical disk.Because this process can easily be implemented by those of ordinary skills, so do not provide herein to its further description.
As mentioned above, the present invention goes for quality digital TV broadcasted content, save the cost of making the digital radio broadcasting content simultaneously, this is because it has used existing digital TV broadcasting content as the digital radio broadcasting content by following technology: via satellite or cable, receive the digital TV broadcasting signal of broadcasting, and after it being changed, its form with digital radio broadcasting signal is sent according to the digital radio broadcasting host-host protocol.
In addition, the present invention is by changing the digital TV broadcasting signal of current broadcast according to the digital radio broadcasting host-host protocol, save the cost of setting up the network that is used to provide new content of multimedia, this is different from prior art, prior art is set up network between program provider, service supplier and Network Provider, content is provided and digital radio broadcasting is provided continuing.
In addition, the present invention makes content be shared by many aspects by being digital radio broadcasting signal with the digital TV broadcasting conversion of signals with low cost, reduce content production cost thus, and serve the recipient for digital radio broadcasting current quality digital TV broadcasted content of broadcasting is provided for less relatively local digital radio broadcast service supplier aspect.
Though described the present invention with respect to certain preferred embodiment, those skilled in the art should be understood that: under the prerequisite of the scope of the present invention that does not break away from the claim qualification, can carry out various changes and improvement.
Claims (13)
1. a broadcast singal conversion equipment is used for Digital Television (TV) broadcast singal is converted to digital radio broadcasting signal, comprises:
Transport stream generates parts, and the TV broadcast singal that is used for receiving and will importing from the external world be converted to the digital TV broadcasting transport stream;
The broadcasting transport format converting member is used for according to digital radio broadcasting transport protocol conversion digital TV broadcasting transport stream, and based on the radio broadcasting plan, generates the digital radio broadcasting transport stream;
The broadcasting multiplex parts are used for the multiplexing digital radio broadcasting transport stream that generates in the broadcasting transport format converting member;
Modulation/up-conversion parts are used for modulator approach according to digital radio broadcasting, are modulated at digital radio broadcasting transport stream multiplexing in the broadcasting multiplex parts, and will be radio frequency (RF) signal through the frequency upconversion of the radio signals of ovennodulation; And
High-power amplifier unit is used for amplifying modulation and the RF signal of up-conversion acquisition, the RF signal that amplifies by transmitting antenna transmission process thus from modulation/up-conversion parts.
2. broadcast singal conversion equipment as claimed in claim 1, wherein transport stream generation parts comprise:
Tuning part is used at the digital TV broadcasting signal of selecting specific channel from the digital TV broadcasting signal of the external world by antenna and communications cable input, and exports selected digital TV broadcasting signal with the form of intermediate frequency (IF) analog broadcast signal; And
The Base-Band Processing parts are used for the IF analog broadcast signal that digitlization and demodulation export in tuning part, thus the IF analog broadcast signal is converted to the digital TV broadcasting transport stream.
3. broadcast singal conversion equipment as claimed in claim 1, wherein transport stream generation parts also comprise:
Signal conversion unit is used for and will be converted to the digital TV broadcasting transport stream from the external world by the TV broadcast singal of privately owned circuit input.
4. broadcast singal conversion equipment as claimed in claim 1, wherein the broadcasting transport format converting member comprises:
Transmission demultiplexing parts, the digital TV broadcasting transmission flow demultiplexing that the conversion that is used for generating from transport stream the parts obtains is transport stream with digital TV broadcasting information on services (SI) and audio/video (AV) data and the transport stream with data;
The SI parts of decoding are used for receiving and analyzing the digital TV broadcasting information on services that transmits from transmission demultiplexing parts;
Interface unit is used for generating packet identifier and program configuration information about the program of radio broadcasting plan according to from the digital TV broadcasting information on services analytical information of SI decoding parts input and the radio broadcasting plan of importing from the external world;
Scheduler, be used for being received in the packet identifier and the program configuration information that generate in the interface unit, packet identifier is sent to A/V transport stream filter element and data transmission stream filter element, and, the program configuration information is sent to digital radio broadcasting SI generate parts according to the airtime;
Digital radio broadcasting SI generates parts, is used for reconfiguring the information on services of digital radio broadcasting according to digital TV broadcasting information on services that sends from SI decoding parts and the program configuration information that sends from scheduler;
The peculiar information of moving picture expert group 2 (MPEG-2) program (PSI) generates parts, is used for according to generating the information on services that reconfigures in the parts at digital radio broadcasting SI, definition MPEG-2 PSI;
Digital radio broadcasting SI rotates transmit block, is used for periodically being sent in digital radio broadcasting SI according to the method for rotating and generates the information on services that reconfigures in the parts;
A/V transport stream filter element is used for according to the packet identifier from the scheduler transmission, from the A/V transport stream that is output in transmission demultiplexing parts, separates the A/V transport stream corresponding to this packet identifier;
A/V code conversion parts are used for changing definition, data bit-rate and compression method as the audio/video of the output signal of transmitting the demultiplexing parts;
The data transmission stream filter element is used for according to the packet identifier from the scheduler transmission, from the data transmission stream that transmits the input of demultiplexing parts certainly, separates the data transmission stream corresponding to packet identifier;
Data broadcasting format conversion parts are used for according to the digital radio broadcasting host-host protocol, will be reconfigured for the digital radio broadcasting data transmission stream from the digital TV broadcasting data transmission stream that the data transmission stream filter element sends;
MPEG PSI generates parts, is used for according to generating the information on services that reconfigures in the parts at digital radio broadcasting SI, definition MPEG PSI; And
Transmit reusable component of software again, be used for multiplexing A/V transport stream from A/V code conversion parts output, generate the MPEG PSI that defines the parts from the digital radio broadcasting data transmission stream of data broadcasting format conversion parts output and at MPEG PSI.
5. broadcast singal conversion equipment as claimed in claim 4, wherein the broadcasting transport format converting member also comprises: memory unit, be used for storing digital radio broadcasting data transmission stream, from the multiplexing again transport stream of transmitting again reusable component of software output and the digital radio broadcasting SI stream of rotating transmit block output from digital radio broadcasting SI from the output of data broadcasting format conversion parts.
6. broadcast singal conversion equipment as claimed in claim 5, wherein scheduler is also carried out according to external request, is sent the control signal that transmits by interface unit to the function of transmitting again reusable component of software; And
Transmitting reusable component of software also carries out and extracts and multiplexing function of coming since the audio transport stream packet of the A/V transport stream of A/V code conversion parts output again.
7. broadcast singal conversion equipment as claimed in claim 6, wherein data broadcasting format conversion parts comprise:
The transmission receiving-member is used for receiving from data transmission stream filter element digital TV broadcasting data transmission stream output, predetermined number;
Transmission sections decoding parts are used for separating the digital TV broadcasting data transmission stream that is received according to sections, and the sections that is separated are separated into header information and data block;
Header information is analyzed and converting member, be used for the digital TV broadcasting that will be separated the header information analysis and be converted to the header information of digital radio broadcasting host-host protocol;
The data block converting member is used for the data block of the digital TV broadcasting that will be separated to be converted to the data block of digital radio broadcasting host-host protocol; And
Digital radio broadcasting data transmission format addressable part is used for according to header information and data block according to the digital radio broadcasting transport protocol conversion, configuration digital radio broadcasting data transmission stream.
8. broadcast singal conversion equipment as claimed in claim 7, wherein in the head conversion process of header information analysis and converting member, under the situation that digital TV broadcasting data download protocol is converted to Euraka-147 digital radio broadcasting multimedia object transmission (MOT) agreement, with the module information (moduleInfoBytes) of digital TV broadcasting, the data value of transaction identifier (transactionId) and block size is assigned as the transmission identifier (transportId) of Euraka-147 digital radio broadcasting, the data value of group identifier (groupId) and main body size.
9. broadcast singal conversion equipment as claimed in claim 8, wherein in the digital radio broadcasting data transmission stream configuration process of digital radio broadcasting data transmission format addressable part, by the digital radio broadcasting host-host protocol that will in the data block converting member, change, each the head core that comprises the main body size data, comprising the extended head of group identifier (groupId) data and data block (body segment) links to each other with the corresponding segments head and fetches configuration MSC data set data field, then by with each MSC data set data field with have the session header of transmission identifier (transportId), MSC data set head and error detection code are connected, configuration MSC data set.
10. broadcast singal conversion equipment as claimed in claim 7, wherein SI decoding parts are by with the extraction table information of getting off: analyze from the information on services of transmission demultiplexing parts input, extract transport stream identification symbol (Transport-stream-id), program number, program source identifier, event ID, universal coordinated time (UTC), local time started of program, program length and program title then from the table information that is extracted.
11. broadcast singal conversion equipment as claimed in claim 10, wherein said table information comprises: Program Association Table (PAT), conditional access table (CAT), Program Map Table (PMT), main guide tab (MGT), system time table (STT), TV virtual channel table (TVCT), stepped zone table (RRT) and Event Information Table (EIT).
12. broadcast singal conversion equipment as claimed in claim 11, wherein digital radio broadcasting SI generates in the parts SI and reconfigures to handle and comprise:
Directly the temporal information of system time table (STT) is converted to the temporal information of fast information group (FIG) class 1 expansion class 1 (FIG 0/1);
Be connected with event information by program source information, directly change the new service identifier (SId and new SID) of FIG class 0 expansion class 16 (FIG 0/16) TVCT;
Local time started of the program of EIT and program length are converted to the program number (PNum with newly PNum) of FIG class 0 expansion class 16 (FIG0/16);
Program title is converted to the characteristics field of FIG class 1 expansion class 5 (FIG 1/5); And
By reconfigure the program configuration information that sends from scheduler according to the Eureka-147 agreement, generation will be in " FIG class 0 expansion class 0 (FIG 0/0) ", " FIG class 0 expansion class 2 (FIG 0/2) ", information on services of storage in " FIG class 0 expansion class 3 (FIG 0/3) " and " FIG class 0 expansion class 8 (FIG 0/8) " about the MCI configuration, be in " FIG class 1 expansion class 0 (FIG 1/0) " and " FIG class 1 expansion class 4 (FIG 1/4) " storage about the information on services of label and the information on services that disposes about program that will in " FIG class 0 expansion class 10 (FIG 0/10) " and " FIG class 0 expansion class 16 (FIG 0/16) ", store.
13. a broadcast singal conversion method is used for Digital Television (TV) broadcast singal is converted to digital radio broadcasting signal, comprises following steps:
TV (TV) broadcast singal is converted to the digital TV broadcasting transport stream;
Based on the radio broadcasting plan,, generate the digital radio broadcasting transport stream by according to digital radio broadcasting transport protocol conversion digital TV broadcasting transport stream;
Generate transport stream;
The multiplexing digital radio broadcasting transport stream that generates;
According to the modulator approach of digital radio broadcasting, the digital radio broadcasting transport stream of modulation multiplex; To be radio frequency (RF) signal through the frequency upconversion of the radio signals of ovennodulation; And the RF signal that amplifies and send the process up-conversion.
Applications Claiming Priority (3)
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| KR1020030097822 | 2003-12-26 | ||
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| CN1918911A true CN1918911A (en) | 2007-02-21 |
| CN100551018C CN100551018C (en) | 2009-10-14 |
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| CNB2004800418820A Expired - Fee Related CN100551018C (en) | 2003-12-26 | 2004-10-12 | Digital TV broadcast signal conversion equipment and method |
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| KR (1) | KR100565900B1 (en) |
| CN (1) | CN100551018C (en) |
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| CN103428455A (en) * | 2012-05-16 | 2013-12-04 | 联阳半导体股份有限公司 | Multimedia broadcasting system, method and device |
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| KR100565900B1 (en) | 2006-03-31 |
| CN100551018C (en) | 2009-10-14 |
| KR20050066954A (en) | 2005-06-30 |
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