High-definition image sawtooth-prevention method, device and digital television receiving terminal

Abstract

The invention provides a high-definition image sawtooth-prevention method, which comprises the following steps: the capacity of a middle cache area and a display cache area is determined according to the display size of different high-definition display modes, the middle cache area and the display cache area with corresponding size are established, the size of the cache image in the middle cache area and the display cache area is determined according to the display size of the present display mode, the image size of the image to be displayed is changed to the image size of the cache image so as to generate a cache image, the cache image is stored into the middle cache area, when the cache image is required to be displayed, the cache image is sent from the middle cache area to the display cache area, and the cache image in the display cache area is displayed. The invention also provides a high-definition image sawtooth-prevention device and a digital television receiving terminal. By implementing the embodiment, the display speed of the high-definition image can be improved, while the high-definition image sawtooth prevention is realized.

Description

technical field [0001] The invention relates to the field of electronics, in particular to a high-definition image anti-aliasing method, device and digital TV receiving terminal. Background technique [0002] The image size of the current high-definition display mode is 720p (that is, the width is 1280 pixels, the height is 720 pixels, referred to as 1280×720) and 1080i (1920×1080). When the digital TV receiving terminal performs high-definition image display, if the image to be displayed If the image size of the image is smaller than the image size of the cached image in the display buffer area, it is necessary to perform horizontal and vertical size transformation when the image data of the image to be displayed is copied from the user data buffer area to the display buffer area, so that the time for image data copying Longer, it exposes certain image data replication details, which are recognized by human eyes as jagged shapes on the image, and the faster the screen switc...

AI Technical Summary

Problems solved by technology

The current anti-aliasing solution needs to synchronize the foreground display buffer area and the background display buffer area when the pointer is switched, that is, the change of the image data in the foreground display buffer area is updated to the image data in the background display buffer area, and the update method is the whole screen Update, take the 1080i display mode, the color bit depth is 32 bits as an example, the amount of copied data reaches 1920×1280×4 bytes (Byte, B)=8.2944 megabytes (Megabyte, MB), and the two cache areas The overhead is 16.5888MB. Due to the large amount of copied data, the copying time is longer and the speed of high-definition image display is reduced.

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