Synchronous displaying method and device

Abstract

The invention provides a synchronous displaying method and a device. The method comprises the following steps that a first display data controller receives data stream and transmits the received data stream to a first display time sequence controller, the first display time sequence controller outputs the data stream to a first display screen according to a display time sequence, the first display time sequence controller also outputs the data stream which is outputted to a first display device to a data multiplexing controller, the data multiplexing controller is used for zooming the data in the received data stream and outputs the data to a second display time sequence controller, the data multiplexing controller calculates a frequency for outputting the data stream from the second display time sequence controller to a second display screen according to a frame time sequence periodicity of the first display screen and a frame time sequence periodicity of the second display screen, and the second display time sequence controller outputs the data stream to the second display screen through the calculated frequency. The device utilizes the said method to output data to the two display screens. Due to adopting the method and the device, the bandwidth resource occupied by a synchronous display device can be reduced, and the production cost can be reduced.

Description

technical field [0001] The invention relates to the field of multimedia data processing, in particular to a method for synchronously displaying video data of multiple display screens and a device for synchronously displaying them. Background technique [0002] Many existing handheld electronic devices with display functions, such as MP4, PDA or learning machines, etc., in addition to displaying videos or images on their own display screens, can also be connected to the display screens of other electronic devices, such as with TVs, computers, etc. Connect to a monitor, projector, etc., and output video or images to an external display device. Since the external display screen has a larger area and better display effect, it is convenient for multiple people to watch the displayed video or image at the same time. In addition, some existing electronic devices can simultaneously drive multiple different display screens to display videos or images. [0003] One device is connect...

AI Technical Summary

Problems solved by technology

[0011] It can be seen that in the existing synchronous display device, the two display data controllers 10, 20 both need to read the data stream from the memory 1, that is, the two groups of display components repeatedly access the memory 1, resulting in a large bandwidth occupied by the synchronous display device , takes up a lot of resources, and at the same time, the power consumption of the synchronous display device is relatively large, and the requirements for electronic equipment are high, which in turn leads to high production costs of electronic equipment

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