CN105765888A - Method and system for the transmission and reception of radiotelevision signals of the terrestrial digital broadcasting type, and related transmitter, receiver system, transmodulator and receiver - Google Patents

Method and system for the transmission and reception of radiotelevision signals of the terrestrial digital broadcasting type, and related transmitter, receiver system, transmodulator and receiver Download PDF

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Publication number
CN105765888A
CN105765888A CN201380081177.2A CN201380081177A CN105765888A CN 105765888 A CN105765888 A CN 105765888A CN 201380081177 A CN201380081177 A CN 201380081177A CN 105765888 A CN105765888 A CN 105765888A
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China
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type
television signal
wireless television
service
channel
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CN201380081177.2A
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Chinese (zh)
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CN105765888B (en
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罗伯特·詹姆斯
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This Trade Of Salol Nico And Service One People Co Ltd
Saronikos Trading and Services Unipessoal Ltda
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This Trade Of Salol Nico And Service One People Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/53—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers
    • H04H20/61—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers for local area broadcast, e.g. instore broadcast
    • H04H20/63—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers for local area broadcast, e.g. instore broadcast to plural spots in a confined site, e.g. MATV [Master Antenna Television]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
    • H04N21/23608—Remultiplexing multiplex streams, e.g. involving modifying time stamps or remapping the packet identifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/61—Network physical structure; Signal processing
    • H04N21/6106—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network
    • H04N21/6112—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network involving terrestrial transmission, e.g. DVB-T
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/61—Network physical structure; Signal processing
    • H04N21/6106—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network
    • H04N21/6143—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network involving transmission via a satellite
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/647—Control signaling between network components and server or clients; Network processes for video distribution between server and clients, e.g. controlling the quality of the video stream, by dropping packets, protecting content from unauthorised alteration within the network, monitoring of network load, bridging between two different networks, e.g. between IP and wireless
    • H04N21/64707—Control signaling between network components and server or clients; Network processes for video distribution between server and clients, e.g. controlling the quality of the video stream, by dropping packets, protecting content from unauthorised alteration within the network, monitoring of network load, bridging between two different networks, e.g. between IP and wireless for transferring content from a first network to a second network, e.g. between IP and wireless
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/02—Arrangements for relaying broadcast information
    • H04H20/06—Arrangements for relaying broadcast information among broadcast stations

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Computer Security & Cryptography (AREA)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Radio Relay Systems (AREA)

Abstract

A method is described for the transmission and reception of radiotelevision signals of the terrestrial digital broadcasting type, said radiotelevision signals comprising a plurality of radiotelevision programs or services receivable by a receiver in a certain frequency band, wherein at least a portion of said frequency band has been discontinued for the radiotelevision signals of the terrestrial digital broadcasting type and assigned to a different service, in particular to a mobile telephony service, such as the LTE type, wherein it is provided to transmit satellite type radiotelevision signals containing said receivable radiotelevision programs or services from which radiotelevision signals of the terrestrial digital broadcasting type are derived that are placed in channels belonging to said portion of said frequency band, said radiotelevision signals of the terrestrial digital broadcasting type not being irradiated, but conveyed via cable to said receiver, wherein the different services especially relates to mobile phone services, such as the services of an LTE type.

Description

For transmitting and receive method and system and relevant emitter, receiver system, conversion modulator and the receptor of the wireless television signal of received terrestrial digital broadcasting type
The present invention relates to the method for wireless television signal for transmitting and receive received terrestrial digital broadcasting type and relevant device.
With reference to Fig. 1, up to now, the reception of the television channel of ground and satellite broadcasting and distribution subsequently use and the Radio Frequency Channel (terrestrial broadcasting of wireless television signal broadcast already by independent or total formula coaxial cable system 1', VHF and UHF waveband) identical Radio Frequency Channel carries out, or by by by the wireless television signal of satellite reception from 11-12GHz spectrum conversion to the first intermediate frequency 1st950-2150MHz in IF wave band carries out, and in 950-2150MHz, they can be distributed when not having excessive attenuation by cable.
More particularly, the wireless television signal of satellite type is received by the satellite antenna 2' relevant to low noise block transducer 3' or LNB, and described transducer makes satellite radio TV signal move to the first intermediate frequency l in the way of blockstIF, and the terrestrial wireless TV signal broadcasted is received by antenna 4', described antenna allows to receive the signal being subsequently passed to the terminals 5' for terrestrial television channel.
Subsequently, by means of coaxial cable distributed network or the dedicated set-top box carrying out television channel described in tuned and demodulated by means of the radio frequency according to television channel (ground and satellite) and modulation signature, satellite and terrestrial wireless TV signal are sent to user's plugs and sockets that the equipment (having TV or iDTV (" integrated digital television ") of integrated digital tuner) with the tuner having for terrestrial broadcasting wave band is connected.Should be noted herein that, being needed to use suitable device (so-called switch) by the reception of the individual consumer in apartment building, described suitable device to be arranged on for tuning referring for example to the plane graph of described apartment building, the upstream of the subscriber computer top box of demodulation and decoding satellite-signal.
Television receiver, Set Top Box and iDTV usually receive the terrestrial television signal (DVB-T/T2) of broadcast；As determined by country and international responsible institution and department, it is possible to be those shown in Fig. 2 from its frequency band starting tuning.
With reference to Fig. 3, illustrating another example of the system 1 of the ground for receiving broadcast and satellite radio TV signal, it is mainly characterized by making in above-mentioned VHF/UHF wave band and modulating all television channels (i.e. DTB Digital Terrestrial Broadcasting (DVB-T) and satellite channel (DVB-S)) of (" COFDM ") through DVB-T (digital video broadcast-terrestrial) typically COFDM is available for the plugs and sockets of user.
Actually, that received by satellite antenna 2, be sent to low noise transducer 3 through the wireless television signal of QPSK modulation, be then converted in for the terminals 7 of satellite television channel before being sent to the distribution network of public TV system together with the signal of other ground TV broadcasts and be modulated into the typical COFDM form of DVB-T.
Only when terrestrial broadcasting does not take all available channels of VHF/UHF wave band but stays sufficient amount of channel unoccupied, this distribution technology is available.Up to date, this requirement is also impossible to realize in some countries, and in these countries, VHF/UHF wave band is almost entirely taken by national and privately owned Television Broadcasting Limited.
Recently, as shown in Figure 4, it has been determined that V-band (UHF) should be limited in the 790MHz corresponding with UHF channel 60, eliminate the digital terrestrial television service of 791MHz to 862MHz (800MHz) and described frequency is distributed to the mobile phone service of LTE type.Therefore, the frequency of 791MHz to 862MHz is no longer a part for the frequency spectrum retained for digital video broadcast-terrestrial (DVB-T) and is therefore no longer able to propagate the TV service in this frequency band, this is owing to such service can be controlled by mobile telephone signal (LTE), due to its system of transmitting in a large number in rural area and Liang Ge region, city, high-caliber LTE signal that this causes being received by television antenna, relative to the signal of the emitter from DTB Digital Terrestrial Broadcasting.But, the TV signal receiver relevant to DTB Digital Terrestrial Broadcasting (DVB-T) still has the ability of tuned and demodulated TV signal relevant with DTB Digital Terrestrial Broadcasting (DVB-T) in 791MHz-862MHz frequency band.Being the frequency always retained for the broadcast of wireless television signal according to ITU global standards owing to nowadays distributing to the frequency of LTE service in some countries, and not necessarily all country all can support that Information Mobile Service disables some frequencies, therefore this can continue many years.Therefore, the manufacturer of television receiver may proceed to produce the equipment of the terrestrial television signal also being able to the TV wave band that reception is likely to disable in some countries.
It is still possible that the upper limit of the available bandwidth of ground TV broadcast can reduce further in the future, remove the wave band of 700MHz.
Therefore, even today, ground TV broadcast is disabled by the UHF channel 61-69 (i.e. 9 radio-frequency channels of 8MHz bandwidth) of the wave band constituting 800MHz.In the future, the UHF channel 49-60 (i.e. extra 12 radio-frequency channels of 8MHz bandwidth) of the wave band of 700MHz also can be deleted.And in this case, the TV signal receiver relevant to ground digital television broadcast (DVB-T) can the relevant TV signal of tuned and demodulated and DTB Digital Terrestrial Broadcasting (DVB-T) within many years.
Can be used for this reduction of the quantity of the radio-frequency channel of ground TV broadcast and can limit the amount of the TV programme that this service can be utilized to be received by user significantly.The deletion of 21 channels is had altogether corresponding to not transmitting up to about 120 different TV programme owing to comprising at least six SD (single-definition) TV programme (by returning in the group being called MUX or multiplexing DVB) encoded, nine channels (at present) and other 12 channels (in the future) through the TV channel (DVB-T) of each terrestrial broadcasting of digital coding and modulation.
Therefore, it is an object of the present invention to point out to which solve method and system and the relevant device of a kind of wireless television signal for transmitting and receive received terrestrial digital broadcasting type and lead to the disadvantage that owing to the wave band being previously allocated to received terrestrial digital broadcasting is assigned to mobile phone service.
Another of the present invention aims at the method and system and relevant device of pointing out a kind of wireless television signal for transmitting and receive received terrestrial digital broadcasting type, and it allows the quantity maintaining the radiovision program that can be received by the TV signal receiver of the DTB Digital Terrestrial Broadcasting of known type constant.
Another object of the present invention is to point out method and system and the relevant device of a kind of wireless television signal for transmitting and receive received terrestrial digital broadcasting type, it need not change the antenna system for receiving described wireless television signal, and has only to simply described antenna system be carried out adaptation and change.
Another object of the present invention is to point out method and system and the relevant device of a kind of wireless television signal for transmitting and receive received terrestrial digital broadcasting type, it is no need to use TV service that before being assigned to mobile operator to the part at the frequency spectrum relevant with DTB Digital Terrestrial Broadcasting, the TV service of reception is quantitatively equal to change or change the receptor of described wireless television signal.
Another object of the present invention is to point out method and system and the relevant device of a kind of wireless television signal for transmitting and receive received terrestrial digital broadcasting type, its allow broadcaster or user in a predefined manner by radiovision program distribution in the frequency band being assigned to Information Mobile Service.
Another object of the present invention is to point out method and system and the relevant device of a kind of wireless television signal for transmitting and receive received terrestrial digital broadcasting type, its coverage rate allowing to increase the wireless television signal of the received terrestrial digital broadcasting type that can be received by the receptor of known type.
Another object of the present invention is to point out method and system and the relevant device of a kind of wireless television signal for transmitting and receive received terrestrial digital broadcasting type, it meets the standard relevant to the use of frequency and needs not move through the mandate being responsible for that broadcasting frequency distribution is used for the department of TV and phone.
The invention still further relates to the reception system of the wireless television signal of received terrestrial digital broadcasting type, emitter and receptor and the conversion modulator used in described reception system.
In a word, in order to limit the impact being greatly reduced of the radio-frequency range being exclusively used in ground TV broadcast, the method and system of the present invention provides the radiovision program being no longer able to find in the channel of the TV of terrestrial broadcasting position by means of satellite television transponder (such as in 11-12GHz wave band) transmission, to receive these programs in the TV antenna system 1 shown in Fig. 3, it is converted into COFDM form subsequently, then it is distributed to owing to being no longer used to ground TV broadcast but being assigned to LTE Information Mobile Service, determine in available radio-frequency channel, namely in the channel (UHF channel 61-69) of 800MHz wave band and in the future in the channel (UHF channel 49-60) of 700MHz wave band.
Use signal distribution system type as shown in Figure 3, this chance determines it is feasible, this is because the shield effectiveness of the cable and device by must being fulfilled for working standard (EN50083-2) solves and ensured because the LTE in this frequency band services the interference problem produced.
It practice, these rules allow the suitable vulnerability to jamming owing to servicing the electromagnetic field produced at the LTE of these frequency band operation.
Therefore, the method and system of the present invention and relevant device allow to use the television channel (current 61-69UHF and in the future 49-60UHF) to ground TV broadcast disabling to be distributed via the cable in independent or total formula dissemination system (main antenna system), and this is owing to these signals with the DVB-T standard (COFDM modulation) that can be received by ordinary numbers TV receptor (iDTV and the Set Top Box for DTT (digital terrestrial television)) or are transmitted with the DVB-T2 standard for television set in the future, receptor and set-top box design.
By the distribution of satellite reception and the TV programme that are nowadays inserted in UHF channel 61-69 can in each independent or total formula cable distribution system by predetermined or different in the way of carry out.
It is important to note that this technology achieves:
A) actually 100% national coverage rate (being undertaken by satellite), and this is impossible for the national ground distributor hairnet network of rate is never completely covered；
B) UHF channel 61-69 and in the future UHF channel 49-60 no longer must be distributed by main body or national sector, but time suitably, can be used in the TV receiving system of any situation, thus freely be used for cable distribution system and without undergoing the interference produced by LTE service.As previously explained, for instance in Europe for being arranged on the device in cable distribution system effectively and the requirement of the standard EN50083-2 enforced provide glitch-free guarantee.Even if coaxial cable itself also must provide for the guarantee of suitably shielding: requirement can utilize the shield effectiveness that the coaxial cable of good quality obtains under frequency band 700-800MHz to be that at least 75dB (grade A) is considered as enough under the current standard.
It addition, use the conversion modulator only worked under 800MHz (in the future at 700MHz) wave band and be likely to be of the cost reduction of the television channel distribution permission acquisition equipment arranged in advance, cause the simplification of its circuit and function.
The present invention is further characterized as the purpose of the claims being considered as the requisite part of this specification.
According to referring specifically to the accompanying drawing detailed description to the method according to the invention and system and relevant device, object above can become more apparent from, in the drawings:
-Fig. 1 illustrates the ground of known type and the figure of the reception system of satellite radio TV signal；
-Fig. 2 illustrates the table of frequency band, and under described frequency band, the receptor of terrestrial broadcast television signal can be tuned；
-Fig. 3 illustrates the figure of the reception system of ground and the satellite radio TV signal used in the method according to the invention and reception system；
-Fig. 4 illustrates that the wave band of the Information Mobile Service of LTE type uses；
-Fig. 5 and 6 respectively illustrate two respective block diagrams of different embodiments of the conversion modulator of the wireless television signal reception system of Fig. 3.
Work specification by the distribution technology to coaxial cable as shown in Figure 3, the technology of proposed inventive solution describes and installation is apparent from, it should be noted that wherein distribution has the channel by satellite reception radiovision program to be the channel channel of 700MHz wave band (and in the future) of the 800MHz wave band being assigned to LTE service.
Such as, due to be previously allocated to the channel of ground TV broadcast not in use by current state, may transmit the TV programme (multiplexing or MUX) of nine different groups via satellite in the wave band 11-12GHZ distribute to this service, and each be transformed into the first intermediate frequency l by therein after antenna system 1 receives themstIF wave band (is modulated through QPSK when DVB-S, or is even modulated through 8-PSK when DVB-S2), changes in UHF channel 61-69 (through the typical COFDM modulation of DVB-T or DVB-T2).This operation can be performed by equipment shown in Fig. 3, and wherein each conversion modulator 9 for the terminals 7 of satellite television channel is made up of following:
-by first intermediate frequency 1 of in the television channel of satellite broadcastingstTuner 20 in IF wave band；
-frame 21,22,23,24 (see Fig. 5), the satellite radio TV signal tuned is modulated (when DVB-S, or modulating even for 8-PSK when DVB-S2) from QPSK and is converted COFDM modulation (DVB-T or DVB-T2) to by it；
-frequency converter 25 subsequently, it can obtain output signal from conversion modulator 9, and described output signal includes in the television channel (8MHz width) between the channel 61 that mid frequency is 794MHz and the channel 69 that mid frequency is 858MHz or one that is included in the television channel between channel 49 and channel 69 in the future.
Television receiver (iDTV and Set Top Box) owing to being able to receive that whole UHF waveband (until channel 69) is still on sale, and therefore user can be able to receive that the radiovision program being still converted (in both frequency and modulation) by satellite broadcasting in channel (such as 61-69UHF of today) through COFDM modulation.
The detailed description of function to conversion modulator 9 is provided below in particular with reference to Fig. 5.
To that received in 11/12GHz wave band by satellite and to be converted on the wireless television signal in the first intermediate frequency band (950-2150MHz) feature operation carried out in the low noise transducer 3 of antenna (parabola) as follows:
1) in the first intermediate frequency band, received signal is tuned by means of tuner 20；
2) by demodulator QPSK or 8-PSK, the output signal carrying out self-tuner 20 is demodulated by qpsk demodulator 21 or when received signal meets DVB-S2 standard when signal meets DVB-S standard；
3) relative to the chnnel coding (be Viterbi (Viterbi) when satellite-signal meets DVB-S standard or be LDPC when satellite-signal meets DVB-S2 standard) used in transmitting at satellite, Read-Solomon decoding (when meeting DVB-S standard at satellite-signal) or BCH (when meeting DVB-S2 standard at satellite-signal), by means of decoder block 22, the output signal from demodulator 21 is decoded, and " descrambling " related data, with the complete multiplexing that acquisition is transmitted by satellite；
4) in the Part I extracting block 23, extract the component constituting multiplexing, to pass through by means of each TV program of the information identification contained (more precisely in SI/PSI table) in multiplexing, user be may want to each component (video, audio frequency and data) of the TV programme of reception and obtain PID (PID Packet Identifier) value being assigned to the multiplexing transmitted by satellite；In the Part II extracting block 23, restructuring is possibly less than the multiplexing of the multiplexing accepted, for instance only use user is interested, the most important thing is under national television broadcast level especially radiovision program and this multiplexing can be included in the CODFM of DVB-T channel (or DVB-T2) transmission capacity modulated；
5) according to COFDM form, the multiplexing of new restructuring is encoded in coder block 24；
6) in channel 61-69UHF (or in the future 49-69UHF) one of the output signal through COFDM coding from coder block 24 carries out frequency conversion in frequency conversion block 25.
Proposed solution is advantageous for, this be due to:
-compared with those broadcast nowadays utilizing DTB Digital Terrestrial Broadcasting (DVB-T), it is allowed to increase the quantity of the television channel of distribution in antenna facility, it is achieved that utilize the reception that the common TV receptor that user has had carries out；
-block 20,21,22,23,24,25 can pass through to reduce holistic cost, the signal that only must generate in 800MHz wave band (with 700MHz wave band in future) and be simplified, described piece for carrying out changing the COFDM being modulated into DVB-T/T2 from QPSK or 8-PSK from QPSK or when received signal meets DVB-S2 standard when signal meets DVB-S standard；
-UHF channel 61-69 (in the future UHF channel 49-69) is used without the mandate by authorities, and this is owing to these channels only use in private antenna dispensing device (domestic system)；
-can select in a predetermined pattern or at random, the prioritization criteria being based even on being set up by user selects to be arranged in by radiovision program in UHF channel 61-69 (in the future UHF channel 49-69) in the MUX comprised；If using following method, then channel distribution is actually set up by technician during the installation of system, that takes into account the preference of user；
-make it possible to be placed in single multiplexing the TV service of user preference, promote the switching from a program to another program (change and turn) and decreased the time of described switching.Actually, if a TV service being changed and changing into next or previous TV service, compared with being then included in the situation in two different multiplexings with two services, when two services are included in same TV multiplexing, the switching time between a service and another service is shorter.
Compared with known solution, the method according to the invention provides the advantage of to simplify and is suitable to now generate UHF channel 61-69 or be suitable to the tuner 20 producing to generate the conversion modulator 9 of UHF channel 49-69 in the future, thus reducing the cost of conversion modulator 9.
In the first further embodiment of the transmission method of the wireless television signal according to the present invention, in order to simplify the operation of execution in the conversion modulator 9 stayed in as shown in Figure 3 and Figure 5 it can be assumed that transmit multiplexing that modulate through QPSK or modulate through 8-PSK when conformance with standard DVB-S2, that have been divided into or can easily be divided into two parts by satellite.Actually, it is up to about 30Mbit/s (Table A .l see ETSIEN300744 standard 1.5.1 version through the transmission capacity of DVB-T channel of the 8MHz of COFDM modulation, (2004-11), 40th page), it is transmission capacity only about half of of satellite repeater, 27.5 million symbols/second can be transmitted, i.e. 55Mbit/s through QPSK modulation.
This first further embodiment includes:
-in the transmission, use the statistics satellite multiplexing that works in a specific way, i.e. it makes each bit rate of two parts (half multiplexing A and half multiplexing B) of multiplexing keep constant in time, and is not only the entirety of multiplexing.The use of common multiplexing (non-statistical) simplifies transmission system, but does not allow optimally to utilize available bandwidth；
-in the reception, use two conversion modulator 9 (or there is the single conversion modulator 9' of two outputs as shown in Figure 6), its (from always can channel 61-69UHF or in the future 49-69UHF) two different channels user-defined predetermined channel or two parts of multiplexing that can be programmed by computer product can carry out conversion modulation to by satellite reception with distribution, described computer product can upload to the memorizer of described conversion modulator 9, and it includes the part of the software code in the block 23 of the Fig. 5 such as explained further below.
In the second further embodiment of the transmission method of the wireless television signal according to the present invention, satellite transmission can be passed through there is the multiplexing for the common approximately half of wave band of DVB-S or DVB-S2 standard, to carry out QPSK demodulation (if DVB-S) or QPSK/8-PSK (if DVB-S2) and to carry out COFDM and again modulate, process without by the conversion modulator 9 of Fig. 3 and 5, This further reduces complexity and cost.This solution is easy to implement but is detrimental to the transmission capacity of satellite.
In the 3rd further embodiment of the transmission method of the wireless television signal according to the present invention, information can be introduced in the suitable part of multiplexing, described information is via being uploaded to the memorizer of described conversion modulator 9 and include in the block 9 of the conversion modulator of Fig. 5, the software program product of software code 23 part that possibility can update via satellite achieves and is again modulated into automatically distributing of the UHF channel 61-69 of COFDM form or UHF channel 49-69 in future, consider by the satellite priority (importance) with the program of QPSK (or when DVB-S2 8-PSK) form broadcast.
This solution relates to haveing the additional advantage that the work simplifying antenna mounting technique person, it is to avoid the erection stage in conversion modulator 9 needs manual definition output channel.It is assumed that nowadays labor cost affects the totle drilling cost of installation larger than the cost of equipment itself, actual broadcast company determine which terrestrial television channel each service (one group of radiovision program) of multiplexing should be included on and can be advantageous for.
Such as, owing to there is the broadcaster undertaking the many services that can not be assigned to single multiplexing, therefore each their all services can be distributed in the multiplexing being close in these broadcaster.Or this distribution of channel can carry out by means of suitable country (or international) agreement.In this case, broadcaster can by such information (namely, performing the information of channel of conversion modulation thereon) in the SI/PSI table that is inserted in multiplexing to exist one, conversion modulator 9 can read the information in suitable table and then can automatically perform tuning.
It should be noted that, the SI table (information on services) limited by DVB and the PSI (program specific information) limited by MPEG are the set of number information describing transmission channel, and wherein service and content thereof must be transmitted: relevant specification is ETSIEN300468.In DVB term, service as TV network (such as ARD), and in MPEG term, TV network is referred to as program.
In order to be more fully described the 3rd further embodiment presented herein, two kinds of situations are mentioned (being mentioned previously as the second and first further embodiment of transmission method) again:
A) in the second further embodiment, the multiplexing transmitted by satellite on terrestrial channel by overall transfer: but the poor efficiency that can there is satellite bandwidth in this case uses, this is to have, due to satellite multiplexing, the capacity about doubled and the meeting that uses is only those needed for multiplexed format is modulated to the COFDM form of DVB-T channel (or DVB-T2) when received signal meets DVB-S standard from QPSK (when received signal meets DVB-S2 standard from QPSK or 8-PSK) directly conversion；
B) in the first further embodiment, the service being present in satellite multiplexing is distributed to from the terrestrial channel disabled on two or more terrestrial channels of selection.
In the first is assumed, the coincidence (situation a) of the bandwidth between satellite and ground multiplexing, it is possible to reference name is called ETSITR101211: the document of " DigitalVideoBroadcasting (DVB) GuidelinesonimplementationandusageofServiceInformation (SI) ".The document has been directed to be transferred to the example of the satellite service of cable network or fixed antenna device.When that occurs, the NIT table (network information table) of satellite is through cable, i.e. describe the table of the feature of satellite channel residing for multiplexing.Therefore, it is possible that, wired or terrestrial decoder (when main antenna device) receives the NIT table about satellite channel, and described decoder should ignore described table in this case, but current decoder will not do so, or the fault of actual decoder can be produced when they do so.
According to embodiments set forth herein, it is contemplated that in satellite multiplexing, be inserted not only through the NIT table about described multiplexing and also insert there is signal must according to the NIT table of the specification (namely belonging to the specification of the channel of the network being positioned at downstream rather than upstream) of the terrestrial channel (DVB-T/T2) of its transmission.Not providing this situation in quoting document: according to the present invention, satellite decoder can ignore the NIT table about terrestrial channel, and terrestrial decoder can ignore the NIT table about satellite multiplexing.
Therefore, when changing specific SI/PSI never in any form, it is possible to send conversion modulator 9 to by automatically calling in information that is required and that selected in the terrestrial channel of retired (decommissioned) by broadcaster.
In the second example (situation b), the only a part of the service (TV program) in satellite channel can be placed on retired terrestrial channel, and other services are assigned to other retired terrestrial channel (at UHF channel 61-69 or in the future in 49-69).In this case, target floor channel must limit for each service.Described situation can be solved in the way of similar with the settling mode of the problem of associate of each service No. LCN (" logical channel number ") with transmission.It practice, in the NIT table of satellite multiplexing, it is possible to it is inserted as each service or the descriptor of radiovision program instruction LCN associated with it.This descriptor is not by MPEG or is provided by DVB: but utilize the motility of specific SI/PSI, it is possible to this descriptor is joined with the form of (" user-defined ") descriptor defined by the user in the NIT table of satellite multiplexing.According to the present invention, utilize another " user-defined " descriptor, it is possible to realize similar device to specify the destination channel of each service.This descriptor can be ignored by all decoders, and can by conversion modulator 9 exclusively with to understand the destination channel of all services with multiplexing.
With reference to Fig. 6, the other method solving situation (b) can be as follows.It not add new descriptor to satellite NIT table, and it is in addition to outside common satellite NIT table, two NIT tables (design based on describing above in relation to situation (a): transmission is positioned at the NIT table of the network in downstream) that current satellite broadcaster can also provide when not having any amendment to each service in reuse satellite can be transferred to two retired digital terrestrial channel are relevant.In other words, can there is the NIT Table A relevant for multiplexing A to half and the NIT table B relevant with half multiplexing B.Each table comprises the data about digital terrestrial channel and LCN list, and on described digital terrestrial channel, described table is placed in half multiplexing.Satellite decoder can ignore the two table, and this is owing to they relate to inconsistent network；But described table can be had two outputs by according to the present invention, use with the conversion modulator 9' of coordination mode work: the service of a portion identification half multiplexing A, they are encoded into COFDM form by block 24a and by block 25a, they are changed in the digital terrestrial channel indicated by NIT Table A, and another part identifies the service of half multiplexing B, they are encoded into COFDM form by block 24b and by block 25b, they are changed in the digital terrestrial channel indicated by NIT table B.Identical operation can be performed by two different conversion modulator, namely it not the conversion modulator of dual output type, but, in this case, first conversion modulator 9 can have to cancel NIT table B, and the second conversion modulator 9 can have to cancel NIT Table A so that each digital terrestrial channel only comprises relative NIT table, to avoid the decoder DVB-T/T2 being positioned at downstream to obscure.
Similar with conversion modulator 9, conversion modulator 9' also includes memorizer, and the software program product including the software code partition in block 23 can be uploaded in described memorizer.
When it is without departing from the novelty principle that present inventive concept is intrinsic, that exemplarily describe, for the method and system and relevant transmitter, receiver system, conversion modulator and receptor transmitting and receiving the wireless television signal of received terrestrial digital broadcasting type, there is many possible modification, this be due to it is also clear that, in its actual form of implementation, illustrated details is probably different, and it can by the element substitution of technically equivalence.
Such as, in order to provide the information needed for the various services (TV program) in the frequency band of the channel (UHF61-69 or in the future UHF49-69) being repositioned at Broadcast Terrestrial TV to conversion modulator 9,9', exist and utilize other of other tables falling within SI/PSI race table possible solution.
It is, for example possible to use SDT (" service describing table ") or PAT (" Program Association Table "), introduce new descriptor.
Therefore, can easily understand that, the invention is not restricted to the method and system of wireless television signal for transmitting and receive received terrestrial digital broadcasting type and relevant transmitter, receiver system, conversion modulator and receptor, but the replacement of various change, improvement, equivalent unit and element can be carried out when without departing from the present inventive concept such as more preferably illustrated in the following claims.

Claims (26)

  1. null1. the method for transmitting the wireless television signal of received terrestrial digital broadcasting type，Described wireless television signal includes multiple radiovision programs or the service that can be received by the receiver in special frequency band，The wireless television signal of received terrestrial digital broadcasting type has been disabled and has been assigned to different services by least some of of wherein said frequency band，Wherein said method is provided for transmission and comprises the radiovision program being able to receive that or service、Satellite type wireless television signal，The wireless television signal of received terrestrial digital broadcasting type in the channel being placed in the described part belonging to described frequency band is obtained from described satellite type wireless television signal，The wireless television signal of described received terrestrial digital broadcasting type is not radiation but sends described receptor to by cable，Described different services particularly mobile phone service，Described mobile phone services such as LTE type.
  2. 2. method according to claim 1, comprises the following steps:
    -receive the wireless television signal of satellite type of the program that is able to receive that described in comprising or service；
    -carry out conversion modulation by means of the wireless television signal of the conversion modulator (9) program to being able to receive that described in this comprising or the satellite type of service, described conversion modulator the wireless television signal of described satellite type is decoded and they is re-encoded as appropriately modulated, treat the wireless television signal that decoded by the TV signal receiver of DTB Digital Terrestrial Broadcasting, described appropriately modulated particularly modulate (DVB-T or DVB-T2) through COFDM；
    -frequency of appropriately modulated described wireless television signal is changed only in the described at least one of radiovision channel belonging to described frequency band (800MHz, 700MHz), and final predetermined distribution television channel, described suitable modulation particularly COFDM (DVB-T or DVB-T2) in the part..
  3. 3. method according to claim 2, wherein determined the distribution in the described at least one of radiovision channel of described frequency band of the described wireless television signal through described suitable modulation, described suitable modulation particularly COFDM (DVB-T or DVB-T2) by the user of described receptor.
  4. 4. method according to claim 1, the wireless television signal of wherein said satellite type includes the multiplexing described by the table of Program Specific Information type or information on services type, be inserted with descriptor in the table, described descriptor for each appointment in the program being able to receive that described in being or service be included in described frequency band described at least some of in destination channel.
  5. 5. method according to claim 1, the wireless television signal of wherein said satellite type includes the multiplexing described by the table of Program Specific Information (PSI) type or information on services (SI) type, described multiplexing is divided into the first half multiplexings (A) and the second half multiplexings (B), described half multiplexing (A, B) in each for be included in described frequency band described at least some of in each destination channel, and wherein it is inserted with descriptor in the table, described descriptor comprise can be described in the information of each appointment respective objects channel in the program that is able to receive that or TV service.
  6. 6. method according to claim 5, is wherein inserted with the second descriptor in the table, and described second descriptor can specify the logical channel number (LCN) with each association in the described program being able to receive that or TV service.
  7. 7., according in claim 4 to 6 one or more described methods, wherein said table is network information table (NIT) table or service describing table (SDT) or Program Association Table (PAT).
  8. null8. method according to claim 1，The wireless television signal of wherein said satellite type includes the multiplexing described by the table of first network information table (NIT) type，Described multiplexing is divided into the first half multiplexings (A) and the second half multiplexings (B)，And in described the first half multiplexings (A), wherein it is inserted with the table of the second network information table (NIT) type，This table can be the radiovision program of described the first half multiplexings (A) or service specify be included in described frequency band described at least some of in destination channel，And each appointment logical channel number (LCN) in the program being able to receive that described in being or service，And in described the second half multiplexings (B), wherein it is inserted with the table of the 3rd network information table (NIT) type，The table of described 3rd network information table (NIT) type can be the radiovision program of described the second half multiplexings (B) or service specify be included in described frequency band described at least some of in destination channel and for each appointment logical channel number (LCN) in described program or service.
  9. 9. according in claim 5 to 8 or method that more are described, wherein using statistics satellite multiplex technique that described multiplexing is divided, the bit rate of wherein said the first half multiplexings (A) and described the second half multiplexings (B) keeps constant over time.
  10. 10. one kind is adapted to be the multiplexer generating satellite type multiplexing, described satellite type multiplexing is designed to the wireless television signal of transmission received terrestrial digital broadcasting type, and described multiplexer includes for implementing the unit according in claim 1 to 9 or method that more are described.
  11. 11. be adapted to be a transmitter for the signal of transmitting satellite type, it includes multiplexer according to claim 10.
  12. 12. a method for the wireless television signal for receiving received terrestrial digital broadcasting type, described wireless television signal is received via satellite, and includes, containing multiple programs or multiplexing that radiovision services, satellite type, said method comprising the steps of:
    A) reception comprises the plurality of radiovision program or service, described satellite type wireless television signal；
    B) conversion modulation is carried out by least one at least one conversion modulator (9, the 9') wireless television signal to described satellite type, described conversion modulator demodulates the wireless television signal of described satellite type, converts thereof in the channel that the wireless television signal of received terrestrial digital broadcasting type and being inserted into by the wireless television signal of described received terrestrial digital broadcasting type belongs to part for frequency band to received terrestrial digital broadcasting disabling；
    C) via coaxial cable, the wireless television signal of described received terrestrial digital broadcasting type is distributed to antenna dissemination system.
  13. 13. method according to claim 12, wherein said method is provided to upload to the part of software code in the memorizer of at least one conversion modulator described (9,9'), it is allowed to radiovision service in the wireless television signal received via satellite described in will be contained in or program are automatically allocated at least one channel of the described part of described frequency band.
  14. 14. method according to claim 13, wherein the described part of software code can be updated by satellite-signal by broadcaster.
  15. 15. method according to claim 12, at least one conversion modulator (9 wherein said, 9') read the descriptor in (PSI) table of Program Specific Information type being included in described multiplexing or the table of information on services (SI) type, described descriptor can be each appointment destination channel in described program or radiovision service and the wireless television signal generating DTB Digital Terrestrial Broadcasting type, the wireless television signal of described DTB Digital Terrestrial Broadcasting type is inserted in channel, described channel is to comprise in the channel between to be placed to those channels indicated in the described descriptor of all programs in described channel or service.
  16. 16. method according to claim 15, wherein said receptor reads the second descriptor, and described second descriptor can specify the logical channel number (LCN) of each association in servicing with described program or radiovision.
  17. 17. method according to claim 16, wherein said table is network information table (NIT) table or service describing table (SDT) or Program Association Table (PAT).
  18. 18. method according to claim 12, wherein said satellite multiplexing includes the first half multiplexings (A) and the second half multiplexings (B), and at least one conversion modulator (9 wherein said, 9') in network information table (NIT), read two and half multiplexing (A, the program of in B) or the destination channel of service, generate the wireless television signal of DTB Digital Terrestrial Broadcasting type, the wireless television signal of described DTB Digital Terrestrial Broadcasting type comprises and has half multiplexing (A, all services of the one in B) or the new multiplexing of program, and described new multiplexing is inserted in the channel by the instruction of described network information table (NIT) table.
  19. 19. method according to claim 18, network information table (NIT) table relevant to the channel launching signal thereon is inserted in described new multiplexing by least one conversion modulator wherein said (9,9'), deletes network information table (NIT) table relevant to another the channel being inserted with said two half multiplexing (A, B) simultaneously.
  20. 20. for the facility of wireless television signal receiving received terrestrial digital broadcasting type, it includes for implementing the unit according in claim 1 to 19 or method of reseptance that more are described.
  21. 21. a conversion modulator (9,9'), comprising:
    -tuner (20), described tuner can in the first intermediate frequency band be tuned to receive satellite-signal；
    -demodulator (21), described demodulator can demodulate the output signal from described tuner (20), extracts the multiplexing of described satellite-signal；
    -extract and rearrange unit (23), described extraction and rearrange unit and identify each program or radiovision service with the information by being included in described multiplexing for extracting the component constituting described multiplexing, described information is such as included in the information in the table of Program Specific Information (PSI) or information on services (SI) type；
    -modulation and frequency translation unit (24,25), described modulation and frequency translation unit are for generating the wireless television signal of received terrestrial digital broadcasting type, this wireless television signal only can be inserted into and the wireless signal of received terrestrial digital broadcasting type disabled and already be allocated in the channel of different service bands, described different services particularly mobile phone service, described mobile phone service is such as LTE type.
  22. 22. a conversion modulator (9,9'), it includes the part of the memorizer that can be uploaded to described conversion modulator (9,9') in software code, and described part allows the radiovision program that will be contained in described multiplexing or service to be automatically assigned to belong at least one channel of a part of frequency band.
  23. 23. conversion modulator according to claim 21 (9,9'), wherein said extraction and rearrange unit (23) and use described component to generate new multiplexing, described new multiplexing includes program or the service of that receive according to prioritization criteria and select, more less than described multiplexing quantity, such as only select radiovision program or the service that user is interested, the most important thing is especially to select under national television broadcast level.
  24. null24. conversion modulator according to claim 21 is (9')，Wherein said satellite multiplexing includes the first half multiplexings (A) and the second half multiplexings (B)，Therein each associate with respective network information table (NIT) table，Described table has the instruction of each destination channel，Described destination channel is selected from those channels of the part belonging to the bandwidth being no longer used to received terrestrial digital broadcasting，The wireless television signal of wherein said DTB Digital Terrestrial Broadcasting type includes two channels of the wireless television signal of DTB Digital Terrestrial Broadcasting type，Said two channel comprises said two half multiplexing (A respectively、All programs of in B) or service and be inserted into the channel by the instruction of corresponding network information table (NIT) table，And wherein said conversion modulator (9') relevant NIT table rather than the network information table (NIT) relevant to another channel are inserted into two wireless television signals of described received terrestrial digital broadcasting type each in.
  25. 25. one kind for transmitting the system of the wireless television signal of received terrestrial digital broadcasting type, described wireless television signal includes multiple radiovision programs or the service that can be received by the receiver in certain frequency band, the wireless television signal of received terrestrial digital broadcasting type disabled at least partially and being assigned to different services in wherein said frequency band, described different services particularly mobile phone service, described mobile phone service is such as LTE type, and described system includes:
    -for transmit comprise described in the unit of the program that is able to receive that or TV service, satellite type wireless television signal；
    -for receive comprise described in the unit of multiple programs of being able to receive that or TV service, described satellite type wireless television signal；
    -for modulating the unit of the wireless television signal of described satellite type by means of at least one conversion modulator (9,9') conversion, described conversion modulator (9,9') demodulates the wireless television signal of described satellite type and converts thereof into the wireless television signal of received terrestrial digital broadcasting type；
    -for the described wireless television signal of the multiple TV programme being able to receive that described in comprising or service being distributed in the unit in antenna assignment facility by coaxial cable, it only uses the described at least one of television channel of described disabling frequency band.
  26. 26. one kind for transmitting the system of the wireless television signal of received terrestrial digital broadcasting type, described wireless television signal includes multiple radiovision programs or the service that can be received in certain frequency band by receptor, wherein according in claim to a method 1 to 19 or more are described, the wireless television signal of received terrestrial digital broadcasting type disabled at least partially and being assigned to different services in described frequency band, described different services particularly mobile phone service, described mobile phone service is such as LTE type.
CN201380081177.2A 2013-11-25 2013-11-25 It is used for transmission and receives the method and system and relevant transmitter, receiver system, conversion modulator and receiver of the wireless television signal of received terrestrial digital broadcasting type Active CN105765888B (en)

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