Real-time electroholography based on computer-generated holograms (CGHs) is expected to become the ultimate three-dimensional (3D) television[1,2]. However, computationally, the CGH calculation rapidly becomes prohibitively expensive because real-time electroholography requires processing extremely high floating-point arithmetic. The image quality of holographic video deteriorates when reconstructed from a point-cloud model comprising a huge number of object points. Two proposals to suppress this deterioration are the time multiplexing for two-dimensional reconstruction and the spatiotemporal division multiplexing for clear 3D holographic video playback. Large-scale electroholography using the spatiotemporal division multiplexing approach implemented on the Horn-8 system has been reported.