CN101494765A - Down frequency selection method for digital living broadcast/order programme cable TV program flow - Google Patents
Down frequency selection method for digital living broadcast/order programme cable TV program flow Download PDFInfo
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- CN101494765A CN101494765A CNA2009100373966A CN200910037396A CN101494765A CN 101494765 A CN101494765 A CN 101494765A CN A2009100373966 A CNA2009100373966 A CN A2009100373966A CN 200910037396 A CN200910037396 A CN 200910037396A CN 101494765 A CN101494765 A CN 101494765A
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Abstract
The present invention relates to a method of selecting frequency point download living broadcast and order program stream in the digital cable television broadcasting network. The object of the present invention is to improve the user capacity in the user zone without occupying more frequency point and program stream, so that the network can still when the total number of user exceeds the total number of program streams. The present invention provides a digital living broadcast-ordering program cable television broadcasting network program stream descending frequency selection method, which divides a plurality of frequency points into living broadcast frequency points and order program frequency points, allocates plural of live programs with a living broadcast frequency point, so that each live program is separately fixed on the allocated living broadcast frequency point for downloading.
Description
Technical field
The present invention relates in the digital cable TV radio network, select frequency to pass method live and request program stream down.
Background technology
Digital live broadcast-program request cable tv broadcast network topology structure such as Fig. 1, CMTS from TV station's machine room (Cable Modem Terminal System) sends example such as Fig. 2 of live and the employed down link of request program to a user area, a plurality of program streams are at A, B, C, D ..., P transmission (A, B, four frequencies of C, D only are shown among the figure) in totally 16 frequencies, suppose that each frequency can transmit 10 parallel program streams, then CMTS can pass 160 program streams at synchronization under a user area.
Consider when a user watches request program, this user must be fixed on the program stream that a frequency receives request program, therefore a set-top box in detecting a user area is opened when being initialization, CMTS just specifies a frequency for this set-top box, and the live or request program of the required reception of this set-top box is all passed under the program stream in specifying frequency.Preferably give each frequency a plurality of user's mean allocation, the number of users of each frequency carrying is tending towards on average, avoid as far as possible occurring that some frequency carries too many user and other frequencies situation of free time too.In above-mentioned example, suppose when user's first is opened set-top box designated from frequency A program receiving stream, also designated when also having other some users to open set-top box from frequency A program receiving stream,
(1) user's first is watched central sports station subsequently, and then CMTS will pass under the program stream of programme televised live in frequency A of central sports station; Other user of designated frequency A (watching live or request program) then takies other program stream (existing programme televised live stream also has the program request program stream among the frequency A) of frequency A;
(2) if designated when user's second is opened set-top box user's second also requires to watch central sports station from frequency B program receiving stream, then CMTS also with the programme televised live of central sports station in frequency B with a biography program stream under; So at one time, same program stream (central sports station) was both passed to first under frequency A, pass to second again under frequency B, had caused the waste of bandwidth resources;
(3) user's first requires to switch to Guangzhou economy platform then, then CMTS passes the programme televised live of Guangzhou economy platform under one of them program stream of frequency A, if other user of designated frequency A is not watching central sports station, the CMTS programme televised live of crossing centre sports station under frequency A no longer then.Similarly, when user's first was watched request program, CMTS also passed this request program under the program stream in frequency A.
Yet, when the user in the user area is more and more,, just have to take the sum that frequency program fluxion total or each frequency increases parallel program stream, otherwise network can't be supported too much user by increase if continue to adopt above-mentioned frequency selection method.But because the program stream resource of real intermediate-frequeney point resource and each frequency all is limited and precious, institute can not unrestrictedly increase for the sum of the program stream that digital live broadcast-interactive broadcasting is used, and this restricts the bottleneck of number of users growth in the user area just.
Summary of the invention
The objective of the invention is to improve the user capacity of user area under the prerequisite that seldom takies frequency and program stream, surpass under the situation of program stream sum in total number of users, network still can be supported.
The present invention provides the digital living broadcast/order programme cable TV program flow down frequency selection method, described radio network has a plurality of frequencies, each frequency can descend to pass parallel a plurality of program streams, it is characterized in that, a plurality of frequencies are divided into live frequency and program request frequency two classes, be that every a plurality of programme televised lives distribute live frequencies, the live frequency that allows each programme televised live be fixed on respectively to be assigned with passes down
When a programme televised live is watched in user request, order this user to receive the program stream of this program from the live frequency that is assigned with down this programme televised live of biography, if wherein this live frequency and the current frequency of this user are inconsistent, then order the user to switch to this live frequency;
When a request program is watched in user's request, for this user specifies a program request frequency, order this user to receive the program stream of request program regularly from this program request frequency, allow this user's request program all pass down from this program request frequency.
Because the present invention incorporates some available frequencies into and is live frequency, the frequency that can be used for passing down request program so and program stream quantity are compared with technology formerly and have just been reduced, but because consider that the user of digital cable TV often need watch programme televised live, the situation that most of users in the user area require to watch request program simultaneously may appear in practice hardly, so the present invention reduces for the program stream resource anxiety that can't cause being used for passing down request program with this way of program stream sum that passes request program at present in practice.
Just because of the user often need watch programme televised live, so the present invention is divided into live frequency and program request frequency two parts to available frequency, wherein live frequency is exclusively used in down and passes programme televised live.As long as determine the sum of programme televised live, just can determine the number of the live frequency that need take, remaining frequency just can incorporate into and be the program request frequency.The present invention is only just specifying (program request) frequency when the user watches request program, and when it watches programme televised live, allow it to switch frequency, make and watching that all users of same programme televised live can share the program stream of a programme televised live, the situation of having avoided same programme televised live to transmit on a plurality of frequencies, this has just saved bandwidth resources greatly.The present invention surpasses under the situation of program stream sum in total number of users, because wherein there are a plurality of users that watch same programme televised live sharing same program stream, so network still can be supported.
Description of drawings
Fig. 1 is that digital live broadcast-program request cable tv broadcast network cell equipment connects topology diagram.
Fig. 2 is the schematic diagram that a plurality of program streams transmit in four frequencies.
Embodiment
Digital live broadcast-program request cable tv broadcast network has 16 frequencies to use, and each frequency can descend to pass 10 parallel program streams, and then CMTS can pass 160 program streams at synchronization under a user area.There are 40 programme televised lives the present, so 16 frequencies are divided into 4 live frequencies and 12 program request frequencies, each live frequency passes the program stream of 10 programme televised lives down, wherein 1-10 in central authorities of central authorities are dispensed on frequency A biography down, 6 in 1-Guangzhou, Guangzhou and 4 in 1-Guangdong, Guangdong are dispensed on frequency B and pass down, other programme televised live then is distributed in frequency C, D and passes down, does not give unnecessary details herein.
User's second is opened set-top box, requires to watch 1 in central authorities subsequently, and then the set-top box of CMTS order second switches to the program stream that frequency A receives 1 in central authorities, is watching that other user's of 1 in central authorities set-top box also receives the program stream of 1 in central authorities from frequency A.User's second requires to watch 2 in central authorities then, and then the set-top box of second need not to switch frequency at the program stream that frequency A receives 2 in central authorities.User's second requires to watch 3 in Guangzhou then, and then the set-top box of CMTS order second switches to the program stream that frequency B receives 3 in Guangzhou.User's second requires request program then, then CMTS specifies a program request frequency for it, frequency K for example, the set-top box of order second receives the program stream of request program regularly from frequency K, CMTS just passes the request program (frequency K can carry maximum 10 users watches request program simultaneously) of second always under frequency K, finish to watch request program until second, change the programme televised live of watching 5 in central authorities into, then the set-top box of CMTS order second switches to the program stream that frequency A receives 5 in central authorities.
Claims (1)
- The digital living broadcast/order programme cable TV program flow down frequency selection method, described radio network has a plurality of frequencies, each frequency can descend to pass parallel a plurality of program streams, it is characterized in that, a plurality of frequencies are divided into live frequency and program request frequency two classes, be that every a plurality of programme televised lives distribute live frequencies, the live frequency that allows each programme televised live be fixed on respectively to be assigned with passes downWhen a programme televised live is watched in user request, order this user to receive the program stream of this program from the live frequency that is assigned with down this programme televised live of biography, if wherein this live frequency and the current frequency of this user are inconsistent, then order the user to switch to this live frequency;When a request program is watched in user's request, for this user specifies a program request frequency, order this user to receive the program stream of request program regularly from this program request frequency, allow this user's request program all pass down from this program request frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100373966A CN101494765A (en) | 2009-02-25 | 2009-02-25 | Down frequency selection method for digital living broadcast/order programme cable TV program flow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100373966A CN101494765A (en) | 2009-02-25 | 2009-02-25 | Down frequency selection method for digital living broadcast/order programme cable TV program flow |
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| CN101494765A true CN101494765A (en) | 2009-07-29 |
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| CNA2009100373966A Pending CN101494765A (en) | 2009-02-25 | 2009-02-25 | Down frequency selection method for digital living broadcast/order programme cable TV program flow |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101854464A (en) * | 2010-06-09 | 2010-10-06 | 华为终端有限公司 | Receiving method, device and system of digital television |
| CN101867778A (en) * | 2010-04-22 | 2010-10-20 | 广州珠江数码集团有限公司 | Live broadcasting method for digital interactive television |
| CN104168504A (en) * | 2014-08-01 | 2014-11-26 | 北京数码视讯科技股份有限公司 | Digital television program switchover method and device |
| CN108494515A (en) * | 2018-03-12 | 2018-09-04 | 北京数码视讯科技股份有限公司 | Response method, device, emergency broadcase system and the set-top box of emergent broadcast |
| CN109474852A (en) * | 2018-12-17 | 2019-03-15 | 深圳创维数字技术有限公司 | Television program playing method, device, equipment and readable storage medium storing program for executing |
-
2009
- 2009-02-25 CN CNA2009100373966A patent/CN101494765A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101867778A (en) * | 2010-04-22 | 2010-10-20 | 广州珠江数码集团有限公司 | Live broadcasting method for digital interactive television |
| CN101854464A (en) * | 2010-06-09 | 2010-10-06 | 华为终端有限公司 | Receiving method, device and system of digital television |
| CN101854464B (en) * | 2010-06-09 | 2013-06-05 | 华为终端有限公司 | Receiving method, device and system of digital television |
| CN104168504A (en) * | 2014-08-01 | 2014-11-26 | 北京数码视讯科技股份有限公司 | Digital television program switchover method and device |
| CN108494515A (en) * | 2018-03-12 | 2018-09-04 | 北京数码视讯科技股份有限公司 | Response method, device, emergency broadcase system and the set-top box of emergent broadcast |
| CN109474852A (en) * | 2018-12-17 | 2019-03-15 | 深圳创维数字技术有限公司 | Television program playing method, device, equipment and readable storage medium storing program for executing |
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Application publication date: 20090729 |