Method and system for transformation of scrolling mode of two-dimensional caption

Abstract

The invention, which mainly relates to processing on a caption special effect in the broadcast television program manufacturing and broadcasting fields, discloses a method and system for transformation of a scrolling mode of a two-dimensional caption. The method comprises: (1), obtaining basic dimension parameters of an original caption window and transformation parameters; (2), according to the transformation parameters, carrying out caption window space reservation so as to determine a caption scanning window and extract parameters of the caption scanning window; (3), calculating a scrolling position according to a scrolling function f (x, y, t) in the caption scanning window and carrying out screen dividing based on the scrolling position; and (4), according to the screen dividing, carrying out rendering on each pixel point position. Moreover, the system consists of a caption window collection unit, a caption window space reservation unit, a screen dividing unit, and a rendering unit. According to the invention, the caption window space reservation is carried out to display an image exceeding the scrolling transformation part, so that problems of image distortion and missing of a scrolling transformation special effect during a playing process can be solved. And moreover, pixel superposition of a scrolling part enables a pixel of the scrolling part to be restored well and truly.

Description

technical field [0001] The invention relates to the production and broadcasting of program subtitles and related technical fields, in particular to a method and system for transforming two-dimensional subtitles in a page scrolling manner. Background technique [0002] In the existing program production and broadcasting and related technical fields, in the process of program material production, in order to better express the text, a large number of subtitles need to be synthesized, especially in the production and playback of large-scale 3D films and materials. In order to obtain better effects, it is often necessary to insert special effects into subtitles. With the continuous improvement of special effects requirements, 3D effect subtitle special effects have appeared one after another. In the process of realizing 3D subtitle special effects, a large amount of data needs to be calculated. And usually will carry out a large number of calculations with the help of the GPU of...

AI Technical Summary

Problems solved by technology

[0004] In the process of 3D subtitle production and synthesis, large-capacity storage space and fast running speed are required, so the requirements for graphics card and GPU are relatively high. In the process of simple special effect synthesis, the system is wasted. At the same time, There are also many restrictions on the playback device, such as operating speed and processing power, which impose restrictions on the production and use of 3D subtitle special effects.

[0005] At the same time, when the page-curling deformation effect is realized in the prior art, because of the different directions of the page-curling, when the page-curling exceeds the display range of the subtitle window, the excess part will not be displayed, resulting in distorted and incomplete graphics

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