Video data processing method and device

Abstract

The invention provides a video data processing device. The video data processing device comprises a processor and a superposed circuit, wherein the processor provides a first set of parameters according to a first channel identification signal and provides a second set of parameters according to a second channel identification signal; and the superposed circuit superposes a first image in first video data at a first time point according to the first set of parameters, and superposes a second image in second video data at a second time point according to the second set of parameters, wherein a time difference between the first time point and the second time point is smaller than a frame interval of the first video data. According to the video data processing method and device provided by the invention, different images can be superposed in multiple pieces of video data by multiplexing hardware in a time division manner through software, so that the image superposition efficiency and the hardware utilization rate are improved.

Description

technical field [0001] The invention relates to the field of video data processing, in particular to a processing method and device for superimposing images on video data. Background technique [0002] The Frame buffer interface is an interface provided by the Linux system for the display device, through which the user can directly read and write to the display buffer and display it on the display device. In embedded Linux products, the bottom layer of graphical interfaces such as QT, Minigui, Android Surfaceflinger, and DirectFb will be connected to the frame buffer (Frame buffer) interface, and the relevant hardware driver layer can be controlled through the frame buffer (Frame buffer) interface to realize functions such as display or image overlay. [0003] In the Linux system, a frame buffer interface corresponds to a piece of hardware through the hardware driver layer. For example, when image overlay processing is performed through the frame buffer interface, a frame b...

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Problems solved by technology

[0003] In the Linux system, a frame buffer interface corresponds to a piece of hardware through the hardware driver layer. For example, when image overlay processing is performed through the frame buffer interface, a frame buffer interface corresponds to an overlay circuit. Under this condition, an overlay circuit The circuit can only process one channel of video data. When processing multiple video data at the same time, multiple sets of superposition circuits are required to realize it, which consumes considerable hardware costs.

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