A kind of program chaining playback method
Technical field
The present invention relates to TV program playing technology field more particularly to a kind of program chaining playback methods.
Background technique
Currently, epoch information is more and more abundant, bandwidth resources are also corresponding more and more precious.In TV programme playing process
In, in the content that practical each channel is broadcast, many contents are identical.Such as daily news hookup, some important sport
Match, political meeting etc.;Many channels all use relay mode to play the content in each channel frequency point: i.e. by its content in each frequency
Point occupies certain bandwidth to play out.That is, multiple and different programs in multiple and different frequencies all exist under this mode
Identical programme data content is transmitted simultaneously.Such as daily news hookup, almost all of satellite TV's program is all in each self-frequency
Point plays identical content.
This repetition plays identical content in other frequencies to realize content broadcasting relay, causes multiple in multiple and different frequencies
Different programs all transmit identical programme data content at the same time, and bandwidth availability ratio is lower.
In view of this, the prior art has much room for improvement and improves.
Summary of the invention
In view of the deficiencies in the prior art, it is an object of that present invention to provide a kind of program chaining playback methods.It aims to solve the problem that existing
Have in technology that there are identical programme data contents on different frequency, leads to the problem that bandwidth availability ratio is lower.
Technical scheme is as follows:
A kind of program chaining playback method, wherein the following steps are included:
S1, the privately owned table of real time monitoring, and obtain linkage descriptor content in privately owned table;
S2, current program information is obtained, and judges the broadcasting control letter in linkage descriptor with the presence or absence of the program
Breath, then carries out step S3 if it exists, otherwise carries out step S4;
S3, judge whether actual program is playing specified link and plays program, if then return step S1, otherwise broadcasts
After putting the link broadcasting program specified in descriptor, step S1 is returned again to;
S4, judge whether actual program is playing specified link and plays program, if then stopping broadcasting link broadcasting
Program restores to play current original program itself;Otherwise return step S1.
The program chaining playback method, wherein before the step S1 further include: increase in privately owned table
Linkage descriptor transmitting link broadcasting control information, the broadcasting control information include one or more original program and
Link plays program pair.
The program chaining playback method, wherein the linkage descriptor transmitting link broadcasting control information packet
It includes: describing link broadcasting control information, tableid=0x9E table using linkage descriptor in tableid=0x9E table
Information is played in all frequencies.
The program chaining playback method, wherein play the link specified in descriptor in the step S3 and play section
Mesh specifically includes:
S31, modification tableid=0x9E table, increase linkage descriptor wherein, and link is arranged and plays control to make
It can state, increase original program and link broadcasting program pair.
The utility model has the advantages that
The program chaining playback method of the application does not need to play identical content in different frequent points when relaying certain program
It is relayed to realize, realizes the bandwidth sharing under broadcast mode, be also equipped with the features such as bandwidth availability ratio is high, control is simple.
Detailed description of the invention
Fig. 1 is the flow chart of the program chaining playback method of the application.
Specific embodiment
The present invention provides a kind of program chaining playback method, to keep the purpose of the present invention, technical solution and effect more clear
Chu defines, and the present invention is described in more detail below.It should be appreciated that specific embodiment described herein is only used to solve
The present invention is released, is not intended to limit the present invention.
Referring to Fig. 1, its flow chart for the program chaining playback method of the application.As shown, the program chaining
Playback method, comprising the following steps:
S1, the privately owned table of real time monitoring, and obtain linkage descriptor content in privately owned table;
S2, current program information is obtained, and judges the broadcasting control letter in linkage descriptor with the presence or absence of the program
Breath, then carries out step S3 if it exists, otherwise carries out step S4;
S3, judge whether actual program is playing specified link and plays program, if then return step S1, otherwise broadcasts
After putting the link broadcasting program specified in descriptor, step S1 is returned again to;
S4, judge whether actual program is playing specified link and plays program, if then stopping broadcasting link broadcasting
Program restores to play current original program itself;Otherwise return step S1.
It is specifically described separately below for above-mentioned steps.
The step S1 is to monitor privately owned table in real time, and obtain linkage descriptor content in privately owned table.Such as: in machine
Set top box terminal creates a monitor task, and the moment monitors privately owned table, and carries out corresponding playback action.Further, the step
Before S1 further include: increase linkage descriptor transmitting link broadcasting control information, the broadcasting control information in privately owned table
It is right that program (tsid, serviceid) is played comprising one or more original program (tsid, serviceid) and link.It is described
Step S2 is to obtain current program information, and judge the broadcasting control information that whether there is the program in linkage descriptor,
The broadcasting control information includes that one or more original program and link play program pair.If it exists, with regard to carrying out
Step S3, there is no carry out step S4.Then, step S3 is to judge whether actual program is playing specified link and plays section
Mesh after otherwise playing the link broadcasting program specified in descriptor, returns again to step S1 if then return step S1.For example,
Front end is played when modifying the privately owned table of 0x9E in program A broadcast program B content and increase linkage descriptor wherein and (need
It is explanatorily that in this application, tableid=0x9E is a citing, rather than tableid is necessarily equal to 0x9E, tableid
Can specifically be formulated by front end operator completely), and it is enabled state that link, which is arranged, to play control, increases original program and chain
It connects and plays program pair.Increasing original program (tsi, serviceid) is A program (tsi, serviceid) and link broadcasting section
Mesh (tsid, serviceid) is B program (tsid, serviceid).When relay finishes, the modification privately owned table of 0x9E is by linkage
Original program and link play program and remove from description to description information in descriptor.Step S4 is whether to judge actual program
It is playing specified link and plays program, if then stopping broadcasting link playing program, restore to play current original program sheet
Body;Otherwise return step S1.
It is played in this way by link, can not need to come in the identical content of different frequent points broadcasting real when relaying certain program
It now relays, for example, by taking news hookup as an example, when 1, center is playing, if Guangdong satellite TV needs to relay news connection
Broadcast program, it is only necessary to which insertion has description link playing function linkage descriptor in privately owned table;STB terminal detection
The link playing function descriptor has been arrived, just according to transport_stream_id and service_id, has found program frequency
Rate, then carry out frequency locking broadcasting.In frequency where the satellite TV of Guangdong, there is no need to the contents of actual play news hookup.Just as
Link on internel network is the same, it is a link.Frequency where the satellite TV of Guangdong can pass so in this period
Send the information datas such as some other data, such as PUSHVOD.
In conclusion the program chaining playback method of the application, firstly, monitoring privately owned table in real time, and obtains in privately owned table
Linkage descriptor content;Then, current program information is obtained, and is judged in linkage descriptor with the presence or absence of the program
Broadcasting control information, then play if it exists in descriptor specify link play program.To without being played in different frequent points
Identical content is relayed to realize, realizes the bandwidth sharing under broadcast mode, is also equipped with the spies such as bandwidth availability ratio is high, control is simple
Point.
It should be understood that the application of the present invention is not limited to the above for those of ordinary skills can
With improvement or transformation based on the above description, all these modifications and variations all should belong to the guarantor of appended claims of the present invention
Protect range.