Fade-in fade-out type TV frequency channel switching method

A TV, fade-out technology, applied in the field of switching TV channels, can solve the problems of loud sound impact, limited dynamic image clarity, affecting the viewing effect, etc., to achieve the effect of prolonging life, protecting eyesight, and reducing waiting troubles

Inactive Publication Date: 2006-12-13
白峰
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the screen contrast before and after switching channels is large, this method will still cause discomfort to the human eye
And because the definition of the dynamic image on the TV is very limited after it is still, the actual viewing effect is not good
[0006] At the same time, the above three methods do not consider the possible impact of image and sound after channel switching
If the image and sound are relatively quiet before switching channels, but the sound is strong after switching, it will bring a greater sound impact, affect the viewing effect, and also affect the life of the TV speakers to a certain extent

Method used

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  • Fade-in fade-out type TV frequency channel switching method
  • Fade-in fade-out type TV frequency channel switching method

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Embodiment Construction

[0017] The present invention is as follows for the implementation process of analog television: (referring to figure 1 )

[0018] 1. At t 0 time, the user issues an instruction to switch the TV channel;

[0019] 2. Since it takes a certain amount of time for the tuner of the TV to re-lock the target channel, it can be set at t after a proper delay (or without delay). 1 moment starts to "fade in", where t 1 ∈[t 0 , t 2 ],t 2 is the moment when the tuner has a stable output after channel switching. Specifically, from t 1 From time to time, the image (including brightness and contrast) and the sound of the previous channel fade out with a certain step length, and until t 2 The image and sound of the "fade-in" channel are not completely zeroed out at the moment. For dual-tuner TVs, this "fade-in" image and sound are always dynamic, and for single-tuner TVs, this "fade-in" image is the last image before switching channels, and the sound is Mute;

[0020] 3. t 2 moment, ...

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Abstract

The invention relates to a method for switching the TV programs by fade-in fade-out type. Wherein, it is characterized in that: at the instant of switching programs, the image of front image (brightness and contrast) and sound are decreased stepped, as fade-in; and the image (brightness and contrast) and sound of next program are increased stepped as fade-out. The invention can e used in analogue and digit TV. And it has the advantages that: 1, it can effectively reduce the impacts of image and sound when switching the programs; 2, and the instant that switching the programs, there is still image; 3, at the instant that switching the programs, the fade-in fade-out effect gives beautiful watch.

Description

technical field [0001] The technical field of the present invention is television manufacturing industry, and more precisely relates to a method for switching television channels. Background technique [0002] There are several common methods for switching TV channels at present: 1, direct switching; 2, first black screen and then switching; 3, first static screen and then switching. [0003] When switching the TV channel directly, the user will see an unstable image state because the tuner of the TV has a process of re-locking the frequency when switching the frequency, which affects the viewing effect. [0004] The method of switching TV channels with a black screen first will often bring greater visual contrast and impact. Among them, a larger contrast will affect the switching speed of the display screen, thereby increasing the time for switching channels; a larger impact will affect the life of a TV picture tube (or its equivalent device) to a certain extent. And ther...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/44
Inventor 白峰
Owner 白峰
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