Method for Generating Video Holograms for a Holographic Display Device with Random Addressing

Method for generating video holograms for a holographic display device with at least one light modulator means on which a scene which is divided into object points is encoded as an entire hologram and where the scene can be seen as a reconstruction from a visibility region which lies within one periodicity interval of the reconstruction of the video hologram, where a sub-hologram is defined by the visibility region together with each object point of the scene to be reconstructed and where the entire hologram is formed by a superposition of sub-holograms, where in a sequence of image contents for each image

• The differential sub-holograms of object points which differ in subsequent images of the sequence are generated, where a differential sub-hologram is defined with regard to the visibility from the observer eyes:
• (a) By the difference of the sub-hologram of an object point which disappeared in the current image, and the sub-hologram of an object point which was covered by it in the preceding image and which is now visible, or
• (b) By the difference of the sub-hologram of an object point which is now visible in the current image and the sub-hologram of an object point which was covered by the other object point in the preceding image, and
• (c) In the case of unchanged visibility, the sub-holograms of the colour and intensity changes at the position of the object point, or data which describe such changes,
• where the generated data are provided to storage means or transferred to the holographic display device.