A method and system for searching digital TV channels
A digital TV and data technology, which is applied in the field of digital TV search method and system, can solve the problems of long search time, inability to determine NIT, and difficulty in using digital TV integrated machines, etc., so as to improve user experience and improve search results. The effect of table speed
Active Publication Date: 2018-04-27
SHENZHEN TCL NEW-TECH CO LTD
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Problems solved by technology
Among them, when using full-frequency point search, digital TV generally searches for channels from low frequency to high frequency. This search process generally takes about 20 minutes, and there is a disadvantage that it takes a long time to search for channels.
Quick channel search uses NIT (Network Information Table, network information table) and SDT (Service Descriptor Table, service description table) to realize channel search. First, you need to find the NIT information, and then extract the Frequency List Descriptor (frequency list descriptor) from the NIT information. Use the frequency information carried by the frequency list descriptor to quickly locate each frequency point with a signal, and at the same time obtain the program information from the SDT data to complete the fast station search, and the system needs to always maintain the NIT, SDT, PMT (Program MapTable, program mapping table), PAT (Program Association Table, program association table) and other table update monitoring, but this method is difficult to apply to digital TV all-in-one machines, because digital TV all-in-one machines for the national market cannot determine where the NIT is located. frequency point
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[0036] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0037] refer to figure 1 , figure 1 It is a schematic flow chart of the first embodiment of the digital TV station searching method of the present invention, and the method includes:
[0038] S10. When the digital TV receives the confirmation instruction of automatic channel search sent by the user, it sends a request to the data card to obtain the NIT information of the network information table, and receives the NIT information fed back from the data card.
[0039] When the user needs to automatically search channels for the digital TV, the user can send an automatic channel search determination instruction to the digital TV, and the digital TV sends a request for obtaining NIT information to the data card according to the determination instruction. The data card responds according to the request of the digital TV...
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The present invention discloses a method and system for digital TV channel search, wherein the method comprises: when the digital TV receives a confirmation instruction for automatic channel search sent by a user, the digital TV sends a request for acquiring network information table NIT information to a data card, and Receive the NIT information fed back from the data card; when the digital TV receives the NIT information, parse the received NIT information to obtain network information, frequency point list information and program list information; When a signal is detected on a frequency point in the frequency point list information, the PMT table and the PAT table are updated to search for stations. The adoption of the embodiments of the present invention greatly improves the channel search speed and improves user experience.
Description
technical field [0001] The present invention relates to the field of digital television, in particular to a digital television channel searching method and system. Background technique [0002] At present, there are two main ways of automatic channel search for digital TV, which are full-frequency channel search and fast channel search. Wherein, when using full-frequency point search, digital TV generally searches for stations sequentially from low frequency to high frequency. This search process generally takes about 20 minutes, and there is a shortcoming that it takes a long time to search for stations. Quick channel search uses NIT (Network Information Table, network information table) and SDT (Service Descriptor Table, service description table) to realize channel search. First, you need to find the NIT information, and then extract the Frequency List Descriptor (frequency list descriptor) from the NIT information. Use the frequency information carried by the frequency ...
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IPC IPC(8): H04N21/2385H04N21/236H04N21/462
Inventor 曾真罗阳志李丽君赵逊凌
Owner SHENZHEN TCL NEW-TECH CO LTD