Kotaro Asai

TL;DR: In this article, the pictures indicated by input digital picture signals 101 are divided into plural areas by an area division part 1 and area-divided picture signals 102 are inputted to a hierarchizing part 2 and an encoding part 4.

TL;DR: In this paper, an inter-frame adaptive prediction encoding system was proposed to prevent the deterioration of picture quality without deteriorating prediction efficiency even if movement changes and the correlation of interframe changes and which can reduce an operation amount required for prediction.

TL;DR: In this article, a digitalized input image signal is divided into four bands by a band dividing filter and the moving vectors are detected by a first encoding part 2, movement compensation prediction is performed and encoded, and band component signals 103a, 104a, and 105a for the other high frequency band are encoded for each divided band based on moving vector information 107 detected by the first decoding part 2.

TL;DR: In this paper, a multidimensional orthogonal conversion encoder of an image signal is proposed to obtain a decoding image for minimizing the degradation of an input image quality. But the three-dimensional conversion coefficient block is inputted to a conversion coefficient separation boundary deciding circuit, and outputs a plane separating signal to indicate the lowest area time direction plane and the plane except it out of the conversion coefficient planes of the time direction.

TL;DR: In this article, the authors proposed to enable encoding at high compressibility by dividing picture signal sequences into plural frequency bands in a time direction and a space direction, and then operating the quantization of a conversion coefficient suited to each band.