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Digital TV channel searching method

A technology for TVs and channels, applied in the parts of color TVs, parts of TV systems, TVs, etc., can solve the problems of long time-consuming process of searching for channels and a large number of fake channels.

Inactive Publication Date: 2010-08-11
SHENZHEN CULTRAVIEW DIGITAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] In order to overcome the negative impact of the digital TV tuner search process, improper handling will easily produce a large number of false stations or cause the search process to take too long, which will affect the use of the shortage. The purpose of the present invention is to allow Under the premise of maximizing the elimination of fake channels, and achieve the fastest channel search process

Method used

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Embodiment 1

[0034] Embodiment 1: as figure 2 As shown, the channel search method utilizing the present embodiment comprises the following steps:

[0035] A. Prepare the environment and state variables;

[0036] B. Judging whether the scanning of the entire frequency range has been completed, if so, the station search ends, otherwise, proceed to step C;

[0037] C. Set the frequency point of the tuner, check whether the AFC window entry and locking conditions meet the locking criterion, if so, then go to step D, otherwise go to step F;

[0038] D, check the locking situation of the video decoder, if locked, then go to step E, otherwise go to step F;

[0039] E. Store location information;

[0040] F. Determine the jump step length of the tuner, refresh the status display of the screen menu, and turn to step B.

[0041] In this embodiment, in step C, checking whether the AFC window entry and locking conditions meet the locking criterion includes the following steps:

[0042] C1. Check...

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Abstract

The invention provides a digital TV channel searching method, comprising the steps of preparing environment and state variables, judging whether scanning in the whole frequency range is completed, setting the frequency points of a tuner, checking whether the AFC window entering and locking conditions meet the locking criteria, checking the locking condition of a video decoder, storing the channel position information, determining the jump and step length of the tuner and refreshing screen menu state display, etc. By using the method to search the channels, channel searching in the whole frequency band is completed within 2min, without omitting channels, and the number of the false channels is less than that of the like products.

Description

technical field [0001] The invention relates to a method for searching channels of a television, in particular to a method for searching channels in a television using a tuned tuner and a digital video decoder. Background technique [0002] High-frequency tuner (TUNER), commonly known as high-frequency head, also known as channel selector, is a key component of household appliances such as TV sets, video recorders, cable TV receivers, and direct satellite TV receivers. Its task is to receive air-transmitted ( Including radio frequency TV signals transmitted by satellites) or cables, and processed by high-frequency circuits to convert them into a fixed intermediate frequency signal (TV, video recorder, cable TV in this way) or into a baseband signal (live broadcast Satellite TV receivers use this method), and then demodulate them back into video signals and audio signals, and finally the video and audio terminal devices --- kinescope and speakers, generate images and audio fo...

Claims

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Application Information

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IPC IPC(8): H04N5/50
Inventor 杨林
Owner SHENZHEN CULTRAVIEW DIGITAL TECH
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