Sending end space frame structure applicable to implicit optical communication system

Abstract

The invention discloses a sending end pace frame structure applicable to an implicit optical communication system. A visual modulation module of which each sub-module modulation coefficient obeys two-dimensional Gaussion distribution, so that the size of the visual modulation module is changed to be 1 / (K*K) of the original size, a hopping edge between adjacent visual modulation modules is weakened, and thus flickering of a source video is further reduced; experiments proof that the visual modulation module has a certain effect on reducing flickering of the source video under a same experience condition. In addition, a source identifier-synchronization dual-purpose LOGO similar to a station caption in a television program is fixed on the top left corner of a playing video image, so that the function of informing a user of embedding of implicit information is completed while a source video watching effect is not influenced; the experiments proof that the video type LOGO which hops once at a fixed position at intervals corresponding to the length of a sending end data packet still can achieve synchronization performance with good robustness even a frame rate is instable.

Description

technical field [0001] The invention relates to the technical field of implicit communication, in particular to a space frame structure of a sending end suitable for an implicit optical communication system. Background technique [0002] The implicit optical communication system utilizes ubiquitous and commercially available array display light emitting devices and terminal imaging devices to establish a safe, low-cost, and diverse visible light communication link for display communication. Implicit optical communication takes into account the visual effects of the human eye and the security of the communication system, and embeds the implicit information into the displayed image or video, which not only ensures the normal display and playback function of the original image and video on the display screen, but also enables the hidden The format information is acquired by the terminal imaging device and demodulated and restored, realizing one-way communication from the displa...

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Problems solved by technology

[0004] Moreover, the implicit optical communication system is committed to embedding the information to be transmitted into the carrier video and ensuring that it is invisible to the human eye, but it is impossible for users to determine whether the video source played by the display carries implicit information. Therefore, it is necessary to design a Logos that are visible to the human eye but do not affect the viewing effect

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