CN114866798A - Method for rapidly acquiring programs in DVB network - Google Patents

Abstract

The invention discloses a method for quickly acquiring programs in a DVB network. The search speed of traditional DVB network program depends on channel hardware, bit rate of transmission table data, CPU and DDR performance, etc., and there are obvious bottlenecks. The method of the invention monitors the program information in the DVB network through the program monitoring machine. If the program information changes, the program monitoring machine performs a station search operation based on the DVB standard, and uploads the acquired program data to the program storage server; the program storage server receives the program monitoring. The program data uploaded by the set is stored, and the program storage server transmits the program data to the user set-top box according to the received query command of the user's set-top box; the user's set-top box obtains the list data from the program storage server through the query method. By adopting the method of the invention, the program list can be obtained extremely quickly even under the super-large DVB network, and the use experience of the set-top box user is improved.

Description

A method for quickly acquiring programs in DVB network

technical field

The invention belongs to the technical field of digital set-top boxes, in particular to a method for quickly acquiring programs in a DVB network.

Background technique

Search station is the basic service of DVB (Digital Video Broadcast, digital video broadcast) set-top box. By filtering and parsing PMT (Program Map Table), PAT (Program Association Table) and SDT (ServiceDescription Table), the information of all programs in the network is obtained, and then It is organized into a data structure suitable for the set-top box and stored in the non-volatile memory of the set-top box.

With the development of DVB standards and various compression technologies, the number of programs in today's DVB networks has doubled, and some large DVB networks even require the ability to search more than 5,000 programs at a time. If the search time for one set of programs is 1 second, then it will take 5,000 seconds to complete the search for 5,000 sets of programs, that is, more than one and a half hours. Such a search speed is unacceptable. Therefore, the speed requirement of searching stations has also become an important performance index of the set-top box.

The search service consists of two modules: one is the filtering and parsing module of PMT, PAT and SDT; the other is the database module. The two modules work as follows:

1. Filter analysis module: lock the TP where the program is located, then filter PAT, PMT, SDT, and obtain program data from the above table. Repeat the above steps until all TPs that need to be searched have been searched.

2. Database module: organize the program data obtained from the PMT, PAT and SDT tables into a data structure suitable for the set-top box for storage.

Among the above two modules, the PMT, PAT, and SDT filtering and parsing modules consume most of the time spent in the search. Among them, frequency locking, waiting for table filtering, and table parsing are time-consuming. Optimizing the search time in most cases All are carried out around optimizing the PMT, PAT, and SDT filtering and parsing modules. The traditional optimization method is generally carried out from optimizing the frequency locking speed, optimizing the filtering speed and optimizing the analysis speed. But no matter how it is optimized, there are obvious limits. For example, the frequency locking speed depends on the performance of the channel hardware, the filtering depends on the bit rate of the transmission table data in the network, and the parsing depends on the running performance of the CPU and DDR, as well as the parsing algorithm. If the program data after the parsing table can be directly obtained, or even the organized program data structure can be directly obtained, the search speed will be greatly improved. In theory, this idea is also the ultimate way to optimize the search speed.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a method for quickly acquiring programs in a DVB network, aiming at the deficiencies of the prior art.

The method of the invention monitors the program information in the DVB network through the program monitoring machine, and if the program information changes, the program monitoring machine performs a station search operation based on the DVB standard, and uploads the acquired program data to the program saving server in jason format; the program saving server The program data uploaded by the program monitoring machine is received and stored, and the program storage server transmits the program data to the user set-top box according to the received query command of the user's set-top box; the user's set-top box obtains the list data from the program storage server through the query method.

The specific process of the program monitoring machine is:

Step Ⅰ. Start the program monitoring machine;

Step II. Perform a full-frequency point search of the DVB standard; if the search fails, perform a full-frequency point search again until the search is successful, and if the search is successful, perform step III;

Step Ⅲ. The acquired satellite list data, TP list data and program list data are uploaded to the program preservation server, and the program preservation server receives the list data according to the data storage order; If the upload fails and the number of uploads does not reach the limit of the number of uploads, then continue to upload; If the upload fails and the number of uploads reaches the limit, go to step IV; if the upload is successful, go to step V;

Step Ⅳ. The program monitoring machine records the error status of the program storage server, and executes Step Ⅴ;

Step V. The program monitoring machine monitors the program information in the DVB network, and if the program information changes, executes step II, and if there is no change, continues monitoring.

The specific process of the program saving server is as follows:

Step (1). Start the program saving server;

Step (2). The program preservation server waits for the order of the program monitoring machine or the user set-top box, if the order is the data storage order sent by the program monitoring machine, then execute step (3), if the order is the data query order sent by the user set-top box, then execute step (7);

Step (3). The program preservation server analyzes the data storage order, obtains the data that needs to be stored, and checks, and the data that needs to be stored is satellite list data, TP list data and program list data; If the verification is performed correctly step (4) ; If the verification is incorrect, execute step (6);

Step (4). The program preservation server saves the acquired list data;

Step (5). The program preservation server sends back data preservation success information to the program monitoring machine, and returns to step (2);

Step (6). The program preservation server sends back data preservation failure information to the program monitoring machine, and returns to step (2);

Step (7). The program storage server returns the list data and its MD5 to the user set-top box, and returns to step (2).

The specific process of the user set-top box is:

Step 1. Start the user set-top box, and the user set-top box updates the list data;

Step 2. The user set-top box sends a data query command to the program storage server;

Step 3. The user set-top box obtains the satellite list data from the program storage server, and checks by MD5, if the check succeeds, then executes step 4, if the check fails, then executes step 7;

Step 4. The user set-top box obtains the TP list data from the program storage server, and performs verification through MD5, if the verification is successful, then executes step ⑤, if the verification fails, then executes step ⑦;

Step ⑤. The user set-top box obtains the program list data from the program storage server, and performs verification through MD5, if the verification is successful, then executes step ⑥, if the verification fails, then executes step ⑦;

Step ⑥. The user set-top box saves the acquired satellite, TP and program list data to the local storage, and acquires the programs in the DVB network;

Step ⑦. The user set-top box deletes the local cached data; judges whether the number of queries has reached the limit: if the number of queries has not been reached, go back to step ②; if the number of queries has been limited, go to step ⑧;

Step ⑧. The user set-top box stops updating the list data.

The search speed of traditional set-top boxes to search DVB network programs depends on the performance of the channel hardware, the bit rate of the transmission table data in the DVB network, the running performance of CPU and DDR, and the parsing algorithm. No matter how it is optimized, there are obvious bottlenecks. Based on a program monitoring machine, a program storage server and a user set-top box, the invention designs a method that can break through the speed limitation of traditional set-top boxes to search for DVB network programs, and the channel performance of the set-top box is no longer affected by the channel performance of the set-top box. The bit rate of the transmission table data, the running performance of CPU and DDR, and the limitations of the parsing algorithm only depend on the Ethernet speed. With the support of today's 100M or even Gigabit Ethernet, the speed of acquiring programs in the DVB network is fundamentally improved. . By adopting the method of the invention, the program list can be obtained extremely quickly even under the super-large DVB network, and the channel search time which requires hours is shortened to minutes, which greatly improves the user experience of the set-top box.

Description of drawings

1 is a schematic diagram of the running sequence of the method of the present invention;

Fig. 2 is the schematic flow chart of the program monitoring machine in the method of the present invention;

3 is a schematic flowchart of a program storage server in the method of the present invention;

FIG. 4 is a schematic flowchart of a user set-top box in the method of the present invention.

Detailed ways

As shown in Figure 1, a kind of method for quickly acquiring programs in the DVB network is to monitor the program information in the DVB network by the program monitoring machine, if the program information changes, then the program monitoring machine carries out a search operation based on the DVB standard, and the acquired program The data is uploaded to the program storage server in jason format; the program storage server receives the program data uploaded by the program monitoring machine and saves it, and the program storage server transmits the program data to the user set-top box according to the received query command of the user's set-top box; the user's set-top box passes the query The method obtains the list data from the program storage server.

As shown in Figures 1 and 2, the specific flow of the program monitoring machine is:

Step Ⅰ. Start the program monitoring machine;

Step II. Perform a full-frequency point search of the DVB standard; if the search fails, perform a full-frequency point search again until the search is successful, and if the search is successful, perform step III;

Step Ⅲ. The acquired satellite list data, TP list data and program list data are uploaded to the program preservation server, and the program preservation server receives the list data according to the data storage order; If the upload fails and the number of uploads does not reach the limit of the number of uploads, then continue to upload; If the upload fails and the number of uploads reaches the limit, go to step IV; if the upload is successful, go to step V;

Step Ⅳ. The program monitoring machine records the error status of the program storage server, and executes Step Ⅴ;

Step V. The program monitoring machine monitors the program information in the DVB network, and if the program information changes, executes step II, and if there is no change, continues monitoring.

As shown in Figures 1 and 3, the specific process of the program storage server is:

Step (1). Start the program saving server;

Step (2). The program preservation server waits for the order of the program monitoring machine or the user set-top box, if the order is the data storage order sent by the program monitoring machine, then execute step (3), if the order is the data query order sent by the user set-top box, then execute step (7);

Step (3). The program preservation server analyzes the data storage order, obtains the data that needs to be stored, and checks, and the data that needs to be stored is satellite list data, TP list data and program list data; If the verification is performed correctly step (4) ; If the verification is incorrect, execute step (6);

Step (4). The program preservation server saves the acquired list data;

Step (5). The program preservation server sends back data preservation success information to the program monitoring machine, and returns to step (2);

Step (6). The program preservation server sends back data preservation failure information to the program monitoring machine, and returns to step (2);

Step (7). The program storage server returns the list data and its MD5 to the user set-top box, and returns to step (2).

As shown in Figures 1 and 4, the specific flow of the user set-top box is:

Step 1. Start the user set-top box, and the user set-top box updates the list data;

Step 2. The user set-top box sends a data query command to the program storage server;

Step 3. The user set-top box obtains the satellite list data from the program storage server, and checks by MD5, if the check succeeds, then executes step 4, if the check fails, then executes step 7;

Step 4. The user set-top box obtains the TP list data from the program storage server, and performs verification through MD5, if the verification is successful, then executes step ⑤, if the verification fails, then executes step ⑦;

Step ⑤. The user set-top box obtains the program list data from the program storage server, and performs verification through MD5, if the verification is successful, then executes step ⑥, if the verification fails, then executes step ⑦;

Step ⑥. The user set-top box saves the acquired satellite, TP and program list data to the local storage, and acquires the programs in the DVB network;

Step ⑦. The user set-top box deletes the local cached data; judges whether the number of queries has reached the limit: if the number of queries has not been reached, go back to step ②; if the number of queries has been limited, go to step ⑧;

Step ⑧. The user set-top box stops updating the list data.

Claims (4)

1. a method for obtaining programs in the DVB network quickly, is characterized in that: the method monitors the program information in the DVB network by the program monitoring machine, if the program information changes, then the program monitoring machine carries out the station search operation based on the DVB standard, will obtain The program data is uploaded to the program storage server in jason format; the program storage server receives the program data uploaded by the program monitor and saves it, and the program storage server transmits the program data to the user set-top box according to the received query command of the user's set-top box; the user's set-top box The list data is obtained from the program storage server through a query method. 2. a kind of quick acquisition DVB network program method as claimed in claim 1 is characterized in that, the concrete flow process of described program monitoring machine is: Step Ⅰ. Start the program monitoring machine; Step II. Perform a full-frequency point search of the DVB standard; if the search fails, perform a full-frequency point search again until the search is successful, and if the search is successful, perform step III; Step Ⅲ. The acquired satellite list data, TP list data and program list data are uploaded to the program preservation server, and the program preservation server receives the list data according to the data storage order; If the upload fails and the number of uploads does not reach the limit of the number of uploads, then continue to upload; If the upload fails and the number of uploads reaches the limit, go to step IV; if the upload is successful, go to step V; Step Ⅳ. The program monitoring machine records the error status of the program storage server, and executes Step Ⅴ; Step V. The program monitoring machine monitors the program information in the DVB network, and if the program information changes, executes step II, and if there is no change, continues monitoring. 3. a kind of quick acquisition DVB network program method as claimed in claim 1 is characterized in that, the concrete flow process of described program preservation server is: Step (1). Start the program saving server; Step (2). The program preservation server waits for the order of the program monitoring machine or the user set-top box, if the order is the data storage order sent by the program monitoring machine, then execute step (3), if the order is the data query order sent by the user set-top box, then execute step (7); Step (3). The program preservation server analyzes the data storage order, obtains the data that needs to be stored, and checks, and the data that needs to be stored is satellite list data, TP list data and program list data; If the verification is performed correctly step (4) ; If the verification is incorrect, execute step (6); Step (4). The program preservation server saves the acquired list data; Step (5). The program preservation server sends back data preservation success information to the program monitoring machine, and returns to step (2); Step (6). The program preservation server sends back data preservation failure information to the program monitoring machine, and returns to step (2); Step (7). The program storage server returns the list data and its MD5 to the user set-top box, and returns to step (2). 4. a kind of quick acquisition DVB network program method as claimed in claim 1 is characterized in that, the concrete flow process of described user set-top box is: Step 1. Start the user set-top box, and the user set-top box updates the list data; Step 2. The user set-top box sends a data query command to the program storage server; Step 3. The user set-top box obtains the satellite list data from the program storage server, and checks by MD5, if the check succeeds, then executes step 4, if the check fails, then executes step 7; Step 4. The user set-top box obtains the TP list data from the program storage server, and performs verification through MD5, if the verification is successful, then executes step ⑤, if the verification fails, then executes step ⑦; Step ⑤. The user set-top box obtains the program list data from the program storage server, and performs verification through MD5, if the verification is successful, then executes step ⑥, if the verification fails, then executes step ⑦; Step ⑥. The user set-top box saves the acquired satellite, TP and program list data to the local storage, and acquires the programs in the DVB network; Step ⑦. The user set-top box deletes the local cached data; judges whether the number of queries has reached the limit: if the number of queries has not been reached, go back to step ②; if the number of queries has been limited, go to step ⑧; Step ⑧. The user set-top box stops updating the list data.

Images