CN1937733A - Method for regulating picture-in-puture display transmitance - Google Patents

Abstract

The invention can modulate diaphaneity of PIP. It adopts the RGB style data of main picture and inner picture to be weighting coefficient transformed and outputs them from itself display window. The transformed inner picture is overlapped with main picture and the diaphaneity of the transformed inner picture is set adjustable. The inner picture has different diaphaneity to prevent main picture covered while viewer is watching. The approach works in the following steps: transferring main picture's video signal into RGB style image data that is memorized in main picture memorizer; transferring inner picture's signal into RGB style image data that is dwindled according to inner picture vision's setting proportion and then memorized in inner picture memorizer; transferring inner picture data and overlapping it on main picture data and the overlapped data is output onto the display screen to display the image after being overlapped.

Description

Regulate the method for picture-in-picture degree of showing transparency

Technical field

Control method of the present invention has been realized transparency and mixed display function to sprite and key frame.

Background technology

The existing television set that possesses the demonstration pip image, normally reserve a sprite rectangular window in a certain horizontal or vertical position of display screen, the split field picture that forms through overcompression is filled in this rectangular window, with identical or different channel on key frame show simultaneously.

Possess the television set that shows pip image, the situation of watching that provides a plurality of pictures to watch or grasp simultaneously for spectators 2 or a plurality of channel TV programs for a plurality of spectators simultaneously is provided.Owing to be superimposed with sprite in the subregion of key frame, thereby at this moment the content of key frame is actually incomplete, has also just influenced spectators' watching quality.

The improvement project that addresses the aforementioned drawbacks, what have takes by the mode with sprite adjusting shielding, but the view reception effect of a plurality of pictures can't be provided like this; Scale and the position of the taking to regulate the window that shows sprite that have, though the sprite window can be moved or dwindles, but still can cover the part main picture image, thereby in fact problem is not solved fully.When spectators watch picture-in-picture, still can't watch complete, high-quality main picture image.

Summary of the invention

The method of adjusting picture-in-picture degree of showing transparency of the present invention, its goal of the invention is to overcome the problems referred to above and defective and takes key frame and sub-image data to being converted to rgb format, and the weight coefficient α that sets according to the user is respectively through output display window separately again after the conversion.Sprite after conversion and key frame stack, the degree of showing transparency of sprite can be regulated, thereby sub-screen image can with translucent or fully transparent way be superimposed upon on the key frame, make spectators when watching sprite, the complete demonstration of main picture image and can be not covered.

The method of described adjusting picture-in-picture degree of showing transparency is handled on the equipment and method basis of picture-in-picture (PIP) at existing television set, has increased by a weight coefficient conversion process at the picture data that is converted to rgb format.

For achieving the above object, the method for described adjusting picture-in-picture degree of showing transparency may further comprise the steps:

The vision signal that is expressed as key frame is converted into the view data of digital rgb form, and places the key frame memory;

To be expressed as the view data of transferring to of the vision signal digital rgb form of sprite, carry out convergent-divergent in the ratio that the sprite window is set, and place the sprite memory;

Weight coefficient α according to the user sets and imports will superpose after sprite and the key frame data transaction respectively, and superimposed data exports mixed display on the display screen to.

It below promptly is the method content of regulating picture-in-picture degree of showing transparency.

In such scheme, weight coefficient α is set and input according to the rating needs by the user, and weight coefficient α is optional in the scope of 0-100%.

Set and the weight coefficient α of input according to the user, will be superimposed upon on the key frame data after the sub-image data conversion respectively, and the key frame data determine according to weight coefficient α that also conversion coefficient changes simultaneously, finish the mixed display after the stack then.

Sub-image data conversion coefficient and key frame data transaction coefficient sum are 1, and promptly conversion coefficient is α and (1-α).

Can set the sub-image data conversion coefficient at this is α, and key frame data transaction coefficient is (1-α).

According to the weight coefficient α that the user sets and imports, sub-image data exports display screen to after changing with weight coefficient α; And simultaneously, the key frame data that are converted into the digital rgb form export the display screen demonstration that superposes after with (1-α) conversion to.Particularly, can following expression formula describe:

L＝α×L1+(1-α)×L2，

Wherein, L1 is the rgb format data of sprite, and L2 is the rgb format data of key frame, and the view data after the L stack that to be final display screen show.

When weight coefficient α was 0, sub-image data was converted into minimum display degree, in fact was fully transparent in the sprite window, thereby the user sees is the complete image of key frame.

When weight coefficient α was 100%, sub-image data was converted into maximum display degree, and the user sees is picture material after sprite and the key frame stack.

When weight coefficient α is between 0-100% during %, the image in the sprite window has different transparent display degrees, thereby the sprite that stack is presented on the key frame has different degree of showing transparency.

In sum, the advantage of the method for described adjusting picture-in-picture degree of showing transparency is:

1, handle on the equipment and method basis of picture-in-picture (PIP) at existing television set, increased by a weight coefficient transfer process at the sub-image data of rgb format, structure and implementation method are easy, and design cost is low and be easy to promote the use of;

2, can regulate the degree of showing transparency of sprite according to user's needs, can not have influence on the rating quality of key frame, improve the result of use of picture-in-picture Presentation Function.

Description of drawings

Fig. 1 is the general flow chart that described existing television set is handled many pictures;

Fig. 2 is the method Executive Module schematic diagram of described adjusting picture-in-picture degree of showing transparency.

Embodiment

Embodiment 1, as shown in Figure 1, the method of described adjusting picture-in-picture degree of showing transparency, when existing television set is handled the pip image demonstration, be expressed as the view data of transferring to of vision signal digital rgb form of sprite and ratio that the sprite window is set and carry out convergent-divergent, and place the sprite memory.

On the basis that above-mentioned sprite scale and display position are determined, increased by a weight coefficient α at user's setting and input, with the flow process that is superimposed upon after the sprite rgb format data transaction on the key frame data, has the mixed display function of the superposition of data of difference degree of showing transparency with realization.

As shown in Figure 2, the vision signal that is expressed as key frame is inputed in the PW2300 chip, and be converted into the view data of digital rgb form;

The vision signal that is expressed as sprite is inputed in the PW3400 chip, and be converted into the view data of digital rgb form;

Weight coefficient α according to the user sets and imports presses weight coefficient α conversion with sub-image data, and by the conversion of (1-α) coefficient, the sub-image data after the conversion is superimposed upon on the key frame data, and exports mixed display on the display screen to the key frame data.

By weight coefficient α is regulated between 0-100% and sets, can realize regulating the sub-screen image of difference degree of showing transparency, carry out mixed display on the key frame to be superimposed upon.

Claims (4)

1, a kind of method of regulating picture-in-picture degree of showing transparency, it is characterized in that: described control method may further comprise the steps,

The vision signal that is expressed as key frame is converted into the view data of digital rgb form, and places the key frame memory;

To be expressed as the view data of transferring to of the vision signal digital rgb form of sprite, carry out convergent-divergent in the ratio that the sprite window is set, and place the sprite memory;

Weight coefficient α according to the user sets and imports will superpose after sprite and the key frame data transaction respectively, and superimposed data exports mixed display on the display screen to.

2, the method for adjusting picture-in-picture degree of showing transparency according to claim 1 is characterized in that: in such scheme, weight coefficient α is set and input according to the rating needs by the user, and weight coefficient α is optional in the scope of 0-100%.

3, the method for adjusting picture-in-picture degree of showing transparency according to claim 2, it is characterized in that: according to the weight coefficient α of user's setting and input, to be superimposed upon on the key frame data after the sub-image data conversion respectively, and simultaneously the key frame data determine according to weight coefficient α that also conversion coefficient changes, and finish the mixed display after the stack then;

Sub-image data conversion coefficient and key frame data transaction coefficient sum are 1, and promptly conversion coefficient is α and (1-α).

4, the method for adjusting picture-in-picture degree of showing transparency according to claim 3 is characterized in that: the sub-image data conversion coefficient is α, and key frame data transaction coefficient is (1-α);

According to the weight coefficient α that the user sets and imports, sub-image data exports display screen to after changing with weight coefficient α; And simultaneously, the key frame data that are converted into the digital rgb form export display screen demonstrations that superpose after with (1-α) conversion to, illustrate with following expression formula particularly,

L＝α×L1+(1-α)×L2，

Wherein, L1 is the rgb format data of sprite, and L2 is the rgb format data of key frame, and the view data after the L stack that to be final display screen show.

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