Image processing method, image processing device and digital television receiving terminal

Abstract

The embodiment of the invention provides an image processing method, which comprises the following steps of: decoding an inputted video signal to generate a video image; generating prompting information according to a prompting request transmitted by application, superimposing the prompting information to the video image to generate a composite video image, and caching the composite video image in an image layer buffer area; acquiring a display element and area information of an image area occupied by the display element in the composite video image according to a display element display request transmitted by the application; superimposing the display element to a corresponding image area of the composite video image in the image layer buffer area according to the area information; and synchronizing the composite video image superimposed with the display element in the image layer buffer area to a display buffer area to display. The embodiment of the invention also provides an image processing device and a digital television receiving terminal. Through the embodiment of the invention, the function of a cursor layer can be realized, and simultaneously, the processing load of a graph mixing module of the digital television receiving terminal can be prevented from being increased.

Description

technical field [0001] The invention relates to the communication field, in particular to an image processing method, an image processing device and a digital television receiving terminal. Background technique [0002] Digital TV receiving terminal can be divided into five layers from top to bottom: cursor layer, image layer, video layer, still frame layer and background layer, and each layer has its own data buffer. Wherein the video layer decodes the video signal currently being watched, generates a video image and caches the video image in the video layer buffer; the image layer obtains the video image from the video layer buffer, and superimposes text or text on the video image Prompt information such as pictures enables the screen to provide users with more additional information, and the video image processed by the image layer is cached in the image layer buffer; the cursor layer obtains the video image superimposed with prompt information from the image layer buffer...

AI Technical Summary

Problems solved by technology

At present, the two layers of the image layer and the video layer are the most commonly used. Since the TV display does not have a cursor input peripheral such as a mouse, the actual use of the cursor layer driver is rarely used. When additionally implemented in the digital TV receiving terminal For the cursor layer, it is necessary to increase the corresponding cursor layer driver and memory overhead, which increases the processing burden of the graphics mixing module of the digital TV receiving terminal

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