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TV channel search method and device

A TV and TV receiving technology, which is applied to TV, color TV, color TV parts, etc., can solve the problems of easily missing channels and long time for analog search

Active Publication Date: 2018-09-04
SHENZHEN TCL DIGITAL TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The main purpose of the present invention is to provide a method and device for TV channel search, aiming to solve the technical problems of the simultaneous coverage of PAL system and SECAM system, the analog search time is long, and the channel is easy to miss

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Embodiment Construction

[0038] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0039] The invention provides a method for searching TV stations, referring to figure 1 , in the first embodiment of the TV channel search method of the present invention, the TV channel search method includes:

[0040] Step S10, when the TV receives the channel search instruction, set the color system of the TV as the first preset color system, and use the preset first frequency point as the current frequency point;

[0041]When the TV receives a search command input by the user (the search command can be issued by the user operating the remote control terminal or directly operating the TV input), it starts to search for channels in the full frequency band of the analog signal (for example, the range of the full frequency band in China is 43MHz to 866MHz), After starting to search for channels, the built-in system o...

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Abstract

The invention discloses a television channel searching method. The method comprises the following steps: when a television set receives a channel searching instruction, setting a color system of the television set as a first preset color system, and taking a preset first frequency point as a current frequency point; if an AFT (Automatic Frequency Trim) voltage of the current frequency point is within a preset voltage interval, judging whether a difference value between a color subcarrier center frequency of the current frequency point and a color subcarrier center frequency of the first preset color system is smaller than a preset threshold or not; if the difference value between the color subcarrier center frequency of the current frequency point and the color subcarrier center frequency of the first preset color system is greater than or equal to the preset threshold, setting the color system of the television set as a second preset color system, and judging whether a valid program channel of the second preset color system is available on the current frequency point or not; and if the valid program channel of the second preset color system is available on the current frequency point, saving the program channel. The invention also discloses a television channel searching device. Through adoption of the television channel searching method and device, the channel searching time is shortened, and missing of program channels during channel searching is avoided.

Description

technical field [0001] The invention relates to the technical field of smart TVs, in particular to a method and device for searching channels for a TV. Background technique [0002] At present, in the world, the color systems of analog TV signals mainly include PAL, SECAM and NTSC. Specifically, in the European continent and other regions, there are mainly PAL and SECAM. Among them, SECAM is mainly France and Russia, and other countries such as Germany, Spain, Belgium and other Western European countries are based on the PAL system. In France, Russia and other countries where the SECAM system is the main system, the analog TV signal is mainly the SECAM system, but in the border areas of the country, there are often analog signals of the PAL system. In response to this situation, TV manufacturers have two ways to set up the analog channel search. One way is to directly force the TV channel search method to the SECAM system search channel, but this will lead to the PAL system...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N21/438H04N5/50H04N7/01
CPCH04N5/50H04N7/0115H04N21/4384
Inventor 罗阳志黄高波
Owner SHENZHEN TCL DIGITAL TECH CO LTD
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