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Method for searching channels and digital television integrated machine using same

A digital TV and all-in-one technology, applied in the field of digital TV all-in-one

Active Publication Date: 2013-05-08
SHENZHEN TCL NEW-TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for searching channels and a digital TV all-in-one using the method, aiming to solve the problem of fast channel search for digital TV all-in-one

Method used

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  • Method for searching channels and digital television integrated machine using same
  • Method for searching channels and digital television integrated machine using same

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Embodiment Construction

[0030] The technical solution provided by the present invention is: according to the center frequency point of the frequency range corresponding to each channel in the standard channel table, a center frequency point list is pre-designed, and the center frequency point list includes the center frequency points of the frequency range corresponding to each channel . When the digital TV all-in-one searches for channels for the first time, it first searches one by one according to the center frequency points in the center frequency point list, searches for NIT, extracts the Frequency List Descriptor from the NIT, and uses the frequency information carried by the Frequency List Descriptor to quickly locate each channel. A frequency point with a signal, so as to complete the fast channel search. In addition, the central frequency point carrying the NIT can also be stored as the main frequency point, and used as the main frequency point for the next quick channel search.

[0031] In...

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Abstract

The invention is applied in the technical field of digital televisions, and provides a method for searching channels and a digital television integrated machine using the same. The method comprises the following steps of: a, searching television signals corresponding to a central frequency point in a central frequency point list one by one till a network information table (NIT) is acquired from the searched television signals; and b, extracting frequency list descriptors from the NIT, and positioning the frequency information carried by the frequency list descriptors to the frequency points with signals. According to the technical scheme provided by the invention, quick search can be performed aiming at the central frequency point to acquire the NIT, the frequency list descriptors are extracted from the NIT, and the frequency information carried by the frequency list descriptors is quickly positioned to the frequency points with signals so as to finish quickly searching the channels.

Description

technical field [0001] The invention belongs to the technical field of digital television, and in particular relates to a channel searching method and a digital television integrated machine adopting the method. Background technique [0002] In the process of developing digital TV all-in-ones, digital TV manufacturers tend to develop a product that can be sold to every city in the country, but it is difficult to include the definitions of operators in all cities in the country during the product development stage , and in the next few years, operators around the world are in the transition stage from sending analog signals to sending digital signals. Frequent system upgrades will bring about uncertainties in PSI (Program Specific Information) / SI (Service Information) and channel settings . This situation has led to great difficulties in functions such as fast channel search and automatic update of program lists for digital-analog integrated TVs facing the national market, b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N21/458H04N21/41
Inventor 曹绍华
Owner SHENZHEN TCL NEW-TECH CO LTD