Image reproducing apparatus
US5331427A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 4, 1992 |
| Grant date | Jul 19, 1994 |
| Priority date | — |
| Expiry date | May 4, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/41
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image reproducing apparatus includes an input part for inputting digital signals indicating an image and for inputting supplementary digital signals, a composition part for coding the digital signals through a prescribed coding process so as to generate a matrix of blocks in which coded data described by coefficients produced through the coding process is contained, the blocks being arranged in two-dimensional coordinates depending on a level of a frequency corresponding to each of coded digital signals, a first control part for determining a first region of low-frequency blocks in which the coded data corresponding to the digital signals are substantially located within the matrix, and a second control part for placing allocation data defining a location of the first region within the matrix into a maximum-frequency block of the matrix, and for placing data corresponding to the supplementary digital signals into a second region of high-frequency blocks of the matrix.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.