Subtitle rendering method based on pixel space mask matrix model

Abstract

The invention relates to the subtitle rendering technology of TV programming field, in particular to a subtitle rendering method based on a pixel space mask matrix model. The method confirms the attribute value of a pixel space mask matrix, carries out texture mapping, shape gradient radial color filling and anti-aliasing processing on subtitle object by establishing the pixel space mask matrix, a texture image matrix and a shape gradient color array according to the polygon vector outline of the subtitle object. The invention makes the subtitle system have the advantages of excellent practicality, general applicability, complete and expansible function and programming and broadcasting timeliness, consequently the increasing requirement of a TV program programming and broadcasting mechanism over subtitle quality, subtitle effect and the like can be met.

Description

technical field [0001] The invention relates to a subtitle rendering technology in the field of television program production, in particular to a subtitle rendering method based on a pixel space mask matrix model. Background technique [0002] Because TV subtitles have an independent ideographic function, as a necessary TV program element, TV subtitles are an important display form of TV graphics. With the subdivision of TV channels and program content, the division of labor of various departments has become more specialized. For the production of different types of programs, it is difficult to meet the requirements with a single type of subtitle system. In addition, the increasing diversity of TV programs and the continuous improvement of TV viewers' appreciation and appreciation level also require that the application mode of TV subtitles must develop in the direction of diversity. [0003] From a broad point of view, the subtitle objects handled by TV subtitles can be di...

AI Technical Summary

Problems solved by technology

[0008] 1. As one of the important indicators of subtitle rendering, the effect of edge anti-aliasing is not ideal, and it cannot even reach a practical level

This is because the existing subtitle system completely relies on the image processing method of the current pixel space when performing anti-aliasing processing. Without the participation of subtitle geometric vector information, sub-pixel-based processing cannot be realized.

This makes the final rendering effect of the existing subtitle system have a relatively obvious edge aliasing effect, which affects the effect of the subtitle display

[0009] 2. When a subtitle object performs gradient color rendering, it should perform radial gradient color processing according to the vector outline of the object, but in the existing subtitle system, the gradient color rendering process is to put the gradient color into a In the memory block, when rendering, the method of corresponding pixel map is still adopted

However, since there is no participation of subtitle geometric vector information, the processing of the filter pipeline will destroy the anti-aliasing effect of the former, that is to say, new edge aliasing effects will be accumulated on the edge processing that is not ideal.

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