CN101123695B

CN101123695B - Wired TV network 'narrow band home access' transmission method

Info

Publication number: CN101123695B
Application number: CN2006100215719A
Authority: CN
Inventors: 石方太
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-08-07
Filing date: 2006-08-07
Publication date: 2010-12-15
Anticipated expiration: 2026-08-07
Also published as: CN101123695A

Abstract

The present invention relates to a transmitting method for narrow band access in cable television network, which belongs to the frequency division multiplexing system technology field. . A tuning unit and a microprocessor combined with the tuning unit are installed in the HUB at the joint of the route network and home network, to process the remote control information uploaded from users and the authorization message downloaded from the network manager. The frequency outputted by the tuning unit can be an intermediate frequency or can be a fixed radio frequency. The present invention makes the cable TV access network became simply and easy to transmit, and easy to manage for operators; which has advantages of low investment, high security, flexible operation and is favorable for the transition of the digital television. The present invention also provides a novel chance to realize ''three networks in one'' according to real fee method and audience rating survey.

Description

Wired TV network ' narrow band home access ' transmission method

(1) technical field:

The present invention relates to a kind of cable television network transmission method, belong to the frequency-division multiplex system technical field.

(2) background technology:

The cable TV transmission network network since being born, the transmission mode that all adopts the broadband to register one's residence always.Program in transmission is more and more, and when transmission broadband pressure was increasing, people also progressively were upgraded to 550MHz, 750MHz with the network bandwidth from 300MHz usually, even 1000MHz etc.Therefore as if network construction cost is multiplied, this also is right and proper, natural thing, never the people raises an objection to this.Along with the extensive application of optical transmission device in recent years, it is very big really to main the contribution of doing net, and is still very remote but optical fiber is registered one's residence.Along with the progressively expansion of network, the user progressively increases in addition, and to the management of user's scientific order, the problem that particularly how to prevent the invalid user stealing cable TV signal is the problem that the cable television operator has a headache most always.So the CA condition receiving management system in simulation scrambling, digital interference, addressable system and the recent digital television transmission system etc. has expended great amount of manpower and material resources and financial resources, in the plurality of proposals especially for the analogue transmission net, almost there is not a kind of scheme generally to be admitted.In recent years, along with the progressively implementation of Digital Television, the transition that people place hope on by Digital Television settles the matter once and for all.But facts have proved also be not fully up to expectations.

(3) summary of the invention:

1, goal of the invention: the present invention is directed to a kind of a large amount of cable television programs are only propped up the master of above problem proposition and do transmission on the net, and a transmission user needs the scheme of viewing channel (being to register one's residence in the arrowband) in Access Network (or being the net of registering one's residence), above problem is readily solved, and with low cost.

2, the present television receiver of technical scheme, TV set-top box etc. all have rf input interface, at equipment individual tuner (or being tuner) arranged all foremost, its major function is the fixed intermediate frequency signal that the radiofrequency signal with faint various frequencies is transformed between one 30 to 40 megahertz, bandwidth has only 8 megahertzes, hands over the intermediate frequency amplifier of back to carry out processing such as filtering, amplification.Technical scheme of the present invention is: a kind of Wired TV network ' narrow band home access ' transmission method, it is at arterial grid and the built-in tuner of line concentration distributor box set up of junction of the net of registering one's residence and the microprocessor of cooperating with it, make the described tuner television channel that several are inequality be converted into a fixing middle frequency domain channel, or a fixing rf channel, and then register one's residence; Microprocessor is used for remote information and the following authorization message that passes of webmaster that process user is uploaded, and then the control tuner is according to instruction works; Its user watches that the microprocessor that the remote signal of information must upload in the line concentrating case also can be transported to network front end as required.

3, beneficial effect: the present invention makes over that the cable television network construction is the most difficult, problem is maximum, maintenance is maximum, and the most serious Access Network part of transmission objective influence is become unusual simple and easy quickly, almost is equal to the mode of registering one's residence of broadband networks, telephone network.The past network management center all can only all be transferred to user's family to all programs, and then attempt to keep a grip on the user, certainly be difficult to, this programme is that the user will see what what just passes, program is grasped in operator's hand, certain all right pipe is many, needn't worry that more the user illegally passes to other people to program again, and the general descrambling that adds also just becomes nonsensical at present.

The advantage of this method maximum is that main feature is aspect user management: 1.. subscriber management server of reduced investment adds the just fine work of energy of related software, because need not scrambling, user side then saves a large amount of descrambling equipment, and reduced investment then is conspicuous.2.. safe front end program only passes to the line concentration distributor box; unlike existing mode; all register one's residence; so need not scrambling; do not worry steal to pass, rating control performer---microprocessor is placed in the line concentrating case, be subjected to the supervision of society, the protection of rules; in user's hand, there is the risk of being copied or duplicating unlike modes such as digital CA " card " by hacker master-hand.Illegally do not controlled for the protection microprocessor and also can take technology maturation and the online mode such as password of changing at any time with low cost to protect, so safe.3.. the problem that the expenses standard of using flexible digital CA to exist at present can't be applied in a flexible way, its root is that " cartridge " is all in user's hand and can be arbitrarily mobile in net, the card of promptly low charge can be taken the high charge occasion and use, and this obviously makes operator's expenses standard of applying in a flexible way be restricted." card " of this programme is placed in the line concentrating case, is immovable, and be unrestricted certainly.4.. the ustomer premises access equipment that helps Digital Television transition this method because of need not descrambling, also with regard to not and front end CA or the supporting problem of subscriber management server, more do not have the battle of so-called digital CA standard.The set-top box of promptly watching Digital Television is that full impregnated is bright, only need possess demultiplexing and decompress, and converts basic functions such as analog signal simultaneously again to, is the universal product the same with television set, is easy to form industrialization production.Can imagine that thus fully standardization, industrialization, free competition, a hundred flowers blossom, the product supply the market of batchs of super quality and competitive price, this yes operator and the most pleased situation of seeing of common people.With at present like this kinds of goods are single, invest hugely, lean on that network operater is huge borrows money, do the passive way of integral translation by force and compare, obviously have more advantages.5. the bright spot of this programme maximum is also aspect " unification of three nets " (or being named the integration of three networks).As everyone knows, the mutual fusion of TV, phone, data three big information networks is a matter of time, and last century is the just generally good Broadcasting Cable Network of brainstrust not, think that Broadcasting Cable Network innately is the broadband, and rate into family is the highest, and is also Out of debt, out of danger.So big measuring mechanism and knowledgeable people spent lot of manpower and material resources, but effect are very little for many years, one of them major reason is run into Access Network this part hard bone exactly in two-way net transformation, gnaw to get off exactly.Because its construction quality is the poorest, structure is the most complicated, and particularly the noise accumulation problem that produces because of up funneling effect does not find a solution that allows the people generally admit all the time.Also have to newly establish special line so broadcasting and TV people is developed the wide screen user so far, its competitive advantage has just been well imagined.Now the optical node of Broadcasting Cable Network enters sub-district or courtyard already in cities and towns, develops to the building, building; The rural area is also many has entered the village even enter an association (or crying the natural village), is that the arrowband special line is registered one's residence if ensuing engineering adopts this programme, innately is exactly two-way net.Is not our this net not just from complete two-way net within sight? because descending of this programme TV takies 8,000,000 bandwidth, remaining tens whole intersection number certificates and communication are used in addition, and obviously its Frequency Distribution also can be very well-to-do.Form " unification of three nets " net with this programme, its cost performance will be very excellent.If 6. we change the power supply of tuner in the line concentrating case by its corresponding user power supply (not getting rid of monitor user ' switching on and shutting down otherwise certainly), subscriber switch machine and when watched that the information of what program has all uploaded to line concentrating case like this, build up line concentrating case behind the data feedback channel of front end, just have ready conditions fully and the details of user's TV reception (also can comprise certainly other service as data business etc.) are delivered to the front end subscriber management server exactly and be recorded in the corresponding files on each of customers.Mix corresponding charging software, just can calculate each user's service charge exactly, this just is expected to break the passive situation that present broadcasting and television network all can only adopt the monthly payment charge since ancient times.This is undoubtedly the fairest and the most reasonable real charge method of pressing.If we mix corresponding statistical software at subscriber management server in addition, the audience rating investigating data of every programs also might accurately be provided at any time, this also is that existing broadcasting and television network is out of the question.

(4) description of drawings:

The present invention also can be described further in conjunction with the embodiments.Figure of description is an input mode schematic block diagram of the present invention.Wherein, Fig. 1 is its intermediate frequency input type cable TV network figure; Fig. 2 is its radio frequency input type cable TV network figure.

(5) embodiment:

Figure of description is two embodiment of the present utility model.

1, directly to select the intermediate frequency of national standard to transmit be the simplest and easy implementation of this imagination to the intermediate frequency transmission plan, and existing ripe and cheap tuner need be done any change hardly and can be used in this programme.If use this programme transmitting digital TV signal, then only need digital TV set-top box get final product with this programme is supporting, as if transmission of analogue signal, then user's television receiver need be changed into intermediate frequency and import receive mode.

2, the radio frequency transmission scheme if adopt the intermediate frequency input scheme, will inevitably be run into user's obstacle that the ideological work difficulty is done when changing IF interface because present television receiver generally is not provided with the intermediate frequency input interface when the transportation simulator TV signal.The special for this reason this programme that proposes.Promptly become and use the family receiver instead, make tuner output radiofrequency signal (as certain channel among the VL) supporting with the radio frequency input of receiver user then into changing the tuner in the line concentration distributor box.And change the thing that tuner is the equipment supplier, obviously with regard to reality how.Add that VL frequency range current cable net does not mostly use, this has increased feasibility for this programme again.When if the user needs two television sets to watch simultaneously, can also increase a rf channel and solve, thereby the trouble of avoiding repeating to lay service wire.From block diagram as can be seen, this programme is not done any change to the main service main part of existing cable network, and to registering one's residence mesh portions, relevant administrative department of country as far back as last century the nineties just propose must adopt the line concentration distribute type to register one's residence, register one's residence but still have many old users to net employing finger assignments mode in the reality even be connected in series branch's subscriber box.If adopt this programme, the net of registering one's residence all must change the line concentration distribute type into, but transmission range can strengthen significantly, and the line footpath is available forr a short time, and this rural area net that user is disperseed will be more suitable.Cities and towns can be located at the building, building generally speaking, the rural area can be located at the natural village in the installation site of line concentration distributor box.

Claims

1. cable television network arrowband transmission method of registering one's residence, it is characterized in that, this transmission method be the built-in tuner of line concentration distributor box set up of junction of arterial grid and the net of registering one's residence and with the microprocessor of described tuner cooperating, the user watches that the remote signal of information uploads to the microprocessor in the line concentrating case; Make the described tuner television channel that several are inequality be converted into a fixing middle frequency domain channel or a fixing rf channel, and then register one's residence; In the net of registering one's residence, only transmit the channel that to watch.

2. the cable television network according to claim 1 arrowband transmission method of registering one's residence it is characterized in that microprocessor is used for the authorization message that remote information that process user uploads and webmaster pass down, and then the control tuner is according to instruction works.

3. the cable television network according to claim 1 arrowband transmission method of registering one's residence is characterized in that the user of this transmission method watches that the remote signal of information is transported to network front end as required.