CN101883232A - Quick channel search method of set top box - Google Patents
Quick channel search method of set top box Download PDFInfo
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- CN101883232A CN101883232A CN 201010240752 CN201010240752A CN101883232A CN 101883232 A CN101883232 A CN 101883232A CN 201010240752 CN201010240752 CN 201010240752 CN 201010240752 A CN201010240752 A CN 201010240752A CN 101883232 A CN101883232 A CN 101883232A
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Abstract
The invention discloses a quick channel search method of a set top box, which comprises the following steps of: (1) starting a demultiplexing/multiplexing module by the set top box and locking a frequency point; and (2) searching a program aid table, a condition reception table and a service description table of the frequency point respectively by three demultiplexing/multiplexing passages in the demultiplexing/multiplexing module of the set top box simultaneously. Compared with the prior art, the demultiplexing/multiplexing module in the set top box searches the program aid table, the condition reception table and the service description table of one frequency point simultaneously; and in addition, a program mapping table is analyzed in parallel by utilizing the residual demultiplexing/multiplexing passages in the demultiplexing/multiplexing module, and program names corresponding to the program mapping table are quickly correlated simultaneously, thereby enhancing the working efficiency of the set top box and quickening the searching speed of programs.
Description
Technical field
The present invention relates to a kind of set-top box program searching method, relate in particular to a kind of set-top box quick channel search method.
Background technology
In recent years, along with the popularization of cable digital TV, cable digital TV set-top box is come into huge numbers of families gradually.The platform mode of searching of TV set-top box and the platform mode of searching of traditional simulated television have bigger different, the platform mode of searching of traditional simulated television is that the variation according to the line of frequently buckling changes stepping and progressively scans from the low frequency to the high frequency, and according to the analog signal decoder module read row, the field synchronization state is finished the platform process of searching of analog signal, when storing program also as long as preserve relevant analog signal.
And, except needs are known frequency and relevant modulation parameter, also need to know the various packet identifiers (PID) of digital television program for digital television program, as parameters such as video identification sign indicating number and audio identification sign indicating numbers.Therefore, set-top box need be analyzed other information of transport stream (TS), as program aid table (PAT), Program Map Table (PMT), CAT Conditional Access Table (CAT) and SDT Service Description Table contents such as (SDT).As follows to further specifying of these information:
Program aid table comprises packet identifier, and it is fixed as 0 * 0000, and it also comprises the Program Map Table of pairing several roads program stream in this frequency point data stream.
Program Map Table comprises the information of one road program, information such as the video packets identification code of this program, audio pack identification code and service identifier for example, and a program aid table generally contains a plurality of Program Map Tables, and the number of Program Map Table is corresponding with the number of program.
CAT Conditional Access Table is the subscriber authorisation situation of concrete database (CA) system, and it contains the system identification of these Database Systems and obtains the packet identifier of Entitlement Management Message, is primarily aimed at reading of enciphered message in the data flow.
The programm name that includes each program in the SDT Service Description Table (SDT), it carries out related with concrete program programm name by service identifier (ServiceID).
Search in the method for platform speed in existing raising Digital Television, various technical schemes mainly realize with raising scanning frequency, quickening tuned speed, the decoding that the transmit flow data of single frequency is carried out is read order and need be PAT-PMT-SDT-CAT, and the analysis for Program Map Table in the program aid table is also carried out one by one, traditional method fails to bring into play system's best performance, searches platform speed and neither optimizedly design.
Summary of the invention
The purpose of this invention is to provide a kind of effective raising set-top box search platform efficient, accelerate to search the set-top box quick channel search method of platform speed.
For achieving the above object, set-top box quick channel search method of the present invention comprises the steps: step 1: set-top box starts demultiplexing module and locks a frequency; Step 2: three demultiplexing passages in the demultiplexing module of set-top box are searched for program aid table, CAT Conditional Access Table and the SDT Service Description Table of this frequency respectively simultaneously.Adopt this method, simultaneously a plurality of information tables are searched for, improved the platform speed of searching.
After searching the program aid table of this frequency in the step 2 of quick channel search method of the present invention, carry out following steps: step 21: analyze program aid table acquisition Program Map Table wherein; Step 22: remove the outer demultiplexing passage of described three the demultiplexing passages of step 2 in the demultiplexing module Program Map Table is carried out parallel parsing; Step 23: obtain the video packets identification code and the audio pack identification code of the corresponding program in the Program Map Table, be stored in the set-top box.After searching the CAT Conditional Access Table of this frequency in the step 2, analysis condition receives the packet identifier that table obtains Entitlement Management Message wherein, is stored in the set-top box.After searching the SDT Service Description Table of this frequency in the step 2, analyze SDT Service Description Table acquisition programm name wherein, be stored in the set-top box.Adopt this method, simultaneously a plurality of information tables are analyzed, improved the platform speed of searching.
When the demultiplexing passage carries out parallel parsing to Program Map Table in the step 22 of quick channel search method of the present invention, when the number of Program Map Table is less than or equal to the number of removing remaining demultiplexing passage outside described three the demultiplexing passages of step 2 in the demultiplexing module, starts the demultiplexing passage that equates with the number of Program Map Table whole Program Map Tables is carried out parallel parsing; When the number of Program Map Table is removed the number of remaining demultiplexing passage outside described three the demultiplexing passages of step 2 in greater than demultiplexing module, remaining demultiplexing passage all starts the Program Map Table that equates with its number is carried out parallel parsing, finish the analysis of a Program Map Table when a demultiplexing passage, discharge immediately another Program Map Table in the remaining Program Map Table is analyzed, move in circles, all analyze until whole Program Map Tables.Adopt this method, utilize that remaining demultiplexing passage has improved the platform speed of searching to a plurality of Program Map Table parallel parsings in the demultiplexing module.
When the program described in the step 23 is scrambled program, also need analyze the packet identifier of the Entitlement Control Message that obtains this program in the quick channel search method of the present invention.Adopt this method, can read and analyze enciphered message.
In the quick channel search method of the present invention when Program Map Table is analyzed, search the corresponding programm name of the service identifier with this Program Map Table that obtains and store by SDT Service Description Table in the set-top box simultaneously, carry out relatedly with the pairing program of this Program Map Table, and be presented on the screen.Adopt this method, programm name that can program and its is corresponding carries out related fast, has accelerated to search platform speed.
In the quick channel search method of the present invention when program aid table, CAT Conditional Access Table and the SDT Service Description Table of this frequency are finished search and are analyzed, demultiplexing module is searched for and is analyzed program aid table, CAT Conditional Access Table and the SDT Service Description Table of next frequency, until the search of finishing whole frequencies and analysis, finish this and search platform.Adopt this method, can finish the platform of searching, thereby finish the whole platform process of searching a plurality of frequencies.
In sum, the present invention compared with prior art, the demultiplexing module in the set-top box is searched for program aid table, CAT Conditional Access Table and the SDT Service Description Table of a frequency simultaneously; Utilize in the demultiplexing module remaining demultiplexing passage to the Program Map Table parallel parsing in addition, the related fast simultaneously programm name corresponding with it, thus improved the operating efficiency of set-top box, accelerated the search speed of program.
Embodiment
The set-top box quick channel search method comprises the steps: step 1: set-top box starts demultiplexing module and locks a frequency; Step 2: three demultiplexing passages in the demultiplexing module of set-top box are searched for program aid table, CAT Conditional Access Table and the SDT Service Description Table of this frequency respectively simultaneously.
After searching the program aid table of this frequency in the step 2 of quick channel search method of the present invention, carry out following steps: step 21: analyze program aid table acquisition Program Map Table wherein; Step 22: remove the outer demultiplexing passage of described three the demultiplexing passages of step 2 in the demultiplexing module Program Map Table is carried out parallel parsing; Step 23: obtain the video packets identification code and the audio pack identification code of the corresponding program in the Program Map Table, be stored in the set-top box.After searching the CAT Conditional Access Table of this frequency in the step 2, analysis condition receives the packet identifier that table obtains Entitlement Management Message wherein, is stored in the set-top box.After searching the SDT Service Description Table of this frequency in the step 2, analyze SDT Service Description Table acquisition programm name wherein, be stored in the set-top box.
When the demultiplexing passage carries out parallel parsing to Program Map Table in the step 22 of quick channel search method of the present invention, when the number of Program Map Table is less than or equal to the number of removing remaining demultiplexing passage outside described three the demultiplexing passages of step 2 in the demultiplexing module, starts the demultiplexing passage that equates with the number of Program Map Table whole Program Map Tables is carried out parallel parsing; When the number of Program Map Table is removed the number of remaining demultiplexing passage outside described three the demultiplexing passages of step 2 in greater than demultiplexing module, remaining demultiplexing passage all starts the Program Map Table that equates with its number is carried out parallel parsing, finish the analysis of a Program Map Table when a demultiplexing passage, discharge immediately another Program Map Table in the remaining Program Map Table is analyzed, move in circles, all analyze until whole Program Map Tables.
When the program described in the step 23 is scrambled program, also need analyze the packet identifier of the Entitlement Control Message that obtains this program in the quick channel search method of the present invention.
In the quick channel search method of the present invention when Program Map Table is analyzed, search the corresponding programm name of the service identifier with this Program Map Table that obtains and store by SDT Service Description Table in the set-top box simultaneously, carry out relatedly with the pairing program of this Program Map Table, and be presented on the screen.
In the quick channel search method of the present invention when program aid table, CAT Conditional Access Table and the SDT Service Description Table of this frequency are finished search and are analyzed, demultiplexing module is searched for and is analyzed program aid table, CAT Conditional Access Table and the SDT Service Description Table of next frequency, until the search of finishing whole frequencies and analysis, finish this and search platform.
Claims (8)
1. set-top box quick channel search method, it is characterized in that: described method comprises the steps:
Step 1: set-top box starts demultiplexing module and locks a frequency;
Step 2: three demultiplexing passages in the demultiplexing module of set-top box are searched for program aid table, CAT Conditional Access Table and the SDT Service Description Table of this frequency respectively simultaneously.
2. according to a kind of set-top box quick channel search method described in the claim 1, it is characterized in that:
After searching the program aid table of this frequency in the described step 2, carry out following steps:
Step 21: analyze program aid table acquisition Program Map Table wherein;
Step 22: remove the outer demultiplexing passage of described three the demultiplexing passages of step 2 in the demultiplexing module Program Map Table is carried out parallel parsing;
Step 23: obtain the video packets identification code and the audio pack identification code of the corresponding program in the Program Map Table, be stored in the set-top box.
3. according to a kind of set-top box quick channel search method described in the claim 2, it is characterized in that: when the demultiplexing passage carries out parallel parsing to Program Map Table in the described step 22, when the number of Program Map Table is less than or equal to the number of removing remaining demultiplexing passage outside described three the demultiplexing passages of step 2 in the demultiplexing module, starts the demultiplexing passage that equates with the number of Program Map Table whole Program Map Tables is carried out parallel parsing; When the number of Program Map Table is removed the number of remaining demultiplexing passage outside described three the demultiplexing passages of step 2 in greater than demultiplexing module, remaining demultiplexing passage all starts the Program Map Table that equates with its number is carried out parallel parsing, finish the analysis of a Program Map Table when a demultiplexing passage, discharge immediately another Program Map Table in the remaining Program Map Table is analyzed, move in circles, all analyze until whole Program Map Tables.
4. according to a kind of set-top box quick channel search method described in the claim 2, it is characterized in that: when the program described in the described step 23 is scrambled program, also need analyze the packet identifier of the Entitlement Control Message that obtains this program.
5. according to any one set-top box quick channel search method described in the claim 1 to 4, it is characterized in that: after searching the CAT Conditional Access Table of this frequency in the described step 2, analysis condition receives the packet identifier that table obtains Entitlement Management Message wherein, is stored in the set-top box.
6. according to any one set-top box quick channel search method described in the claim 1 to 4, it is characterized in that: after searching the SDT Service Description Table of this frequency in the described step 2, analyze SDT Service Description Table acquisition programm name wherein, be stored in the set-top box.
7. a kind of set-top box quick channel search method according to claim 6, it is characterized in that: when described Program Map Table is analyzed, search the corresponding programm name of the service identifier with this Program Map Table that obtains and store by SDT Service Description Table in the set-top box simultaneously, carry out relatedly with the pairing program of this Program Map Table, and be presented on the screen.
8. according to any one set-top box quick channel search method described in the claim 1 to 4, it is characterized in that: when program aid table, CAT Conditional Access Table and the SDT Service Description Table of described frequency are finished search and analyzed, demultiplexing module is searched for and is analyzed program aid table, CAT Conditional Access Table and the SDT Service Description Table of next frequency, until the search of finishing whole frequencies and analysis, finish this and search platform.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010240752 CN101883232A (en) | 2010-07-30 | 2010-07-30 | Quick channel search method of set top box |
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| CN 201010240752 CN101883232A (en) | 2010-07-30 | 2010-07-30 | Quick channel search method of set top box |
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| CN101883232A true CN101883232A (en) | 2010-11-10 |
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| CN 201010240752 Pending CN101883232A (en) | 2010-07-30 | 2010-07-30 | Quick channel search method of set top box |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102595236A (en) * | 2012-01-31 | 2012-07-18 | 深圳创维数字技术股份有限公司 | Set top box and method thereof for changing channels of digital television |
| CN103179430A (en) * | 2011-12-20 | 2013-06-26 | 中国电信股份有限公司 | Method, device and server for audio and video content transcoding on basis of cloud computing |
| CN107295397A (en) * | 2017-06-27 | 2017-10-24 | 金华知产婺源信息技术有限公司 | A kind of channel search method and device for shortening the tuning time |
| CN108989719A (en) * | 2018-06-29 | 2018-12-11 | 广州视源电子科技股份有限公司 | Channel search method, system, readable storage medium storing program for executing and smart television |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101656842A (en) * | 2008-08-22 | 2010-02-24 | 深圳Tcl新技术有限公司 | Single frequency point quick channel search method of digital television |
-
2010
- 2010-07-30 CN CN 201010240752 patent/CN101883232A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101656842A (en) * | 2008-08-22 | 2010-02-24 | 深圳Tcl新技术有限公司 | Single frequency point quick channel search method of digital television |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103179430A (en) * | 2011-12-20 | 2013-06-26 | 中国电信股份有限公司 | Method, device and server for audio and video content transcoding on basis of cloud computing |
| CN102595236A (en) * | 2012-01-31 | 2012-07-18 | 深圳创维数字技术股份有限公司 | Set top box and method thereof for changing channels of digital television |
| CN102595236B (en) * | 2012-01-31 | 2016-05-18 | 深圳创维数字技术股份有限公司 | A kind of method of Set Top Box and changing channels of digital television thereof |
| CN107295397A (en) * | 2017-06-27 | 2017-10-24 | 金华知产婺源信息技术有限公司 | A kind of channel search method and device for shortening the tuning time |
| CN108989719A (en) * | 2018-06-29 | 2018-12-11 | 广州视源电子科技股份有限公司 | Channel search method, system, readable storage medium storing program for executing and smart television |
| CN108989719B (en) * | 2018-06-29 | 2021-06-25 | 广州视源电子科技股份有限公司 | Channel searching method and system, readable storage medium and smart television |
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Application publication date: 20101110 |