Graphics interchange format (GIF) file processing method and device for digital television system

Abstract

The invention discloses a graphics interchange format (GIF) file processing method and a GIF file processing system for a digital television system. The processing method comprises a front-end processing method and a terminal processing method. The front-end processing method comprises the following steps of: decoding a GIF file to obtain a red, green and blue (RGB) image frame and the transparent information of pixels of the RGB image frame; regulating RGB values of the pixels according to the transparent information of the pixels of the RGB image frame, wherein the regulated RGB values are used for reflecting whether corresponding pixels require transparent processing or not; converting the RGB image frame with the regulated RGB values into a luma and chroma (YUV) image frame; performing video coding on the YUV image frame according to a preset video coding standard to obtain video data; and transmitting the video data. The device provided by the invention comprises a front-end processing system and a terminal processing device. By the processing method and the processing device provided by the invention, the finite central processing unit (CPU) resources of a digital televisionset-top box are saved, the GIF file with a high frame rate and large images can be used, and dynamic images, with transparency effects, of the GIF file can be displayed at a terminal.

Description

technical field [0001] The invention relates to the technical field of digital television, in particular to a method and device for processing GIF files in a digital television system. Background technique [0002] Along with the popularization of digital television use and the development of digital television technology, digital television users have put forward higher requirements to the picture effect of watching, for example, wish to see the hypertext markup language (Hyper Text Mark-up Language, HTML) page. HTML pages allow dynamic images in different data formats to be embedded. These dynamic images are not only vivid, but also the application of transparent background effects makes the dynamic effects colorful. Among various dynamic image formats, the Graphics Interchange Format (GIF) format is a widely used dynamic image format. [0003] At present, the usual way for digital TV systems to process GIF files is to decode GIF files through the central processing unit...

AI Technical Summary

Problems solved by technology

[0003] At present, the usual way for digital TV systems to process GIF files is to decode GIF files through the central processing unit (Central Processing Unit, CPU) of the set-top box, but this decoding belongs to soft decoding, which needs to consume a large amount of CPU resources, and the system load is high. When the frame rate of the GIF file is high or the image size is large, the limited CPU resources of the set-top box cannot meet the real-time decoding of the image in the GIF file, and the animation effect may not be smooth when displayed, and the user will feel the picture when watching it. noticeable jumps and stops

Therefore, generally do not support high frame rate, the GIF file of large-size image in the existing digital TV HTML page, or show GIF file by reducing frame rate, the method for reducing image size, but these solutions either cannot use GIF file , either reduces the quality of the GIF file image and the effect of the animation, making the application and development of the GIF file dynamic image in the digital TV system limited

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