Image processing apparatus
US8081679B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 15, 2007 |
| Grant date | Dec 20, 2011 |
| Priority date | — |
| Expiry date | Mar 5, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/176
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image processing apparatus includes a quantizing unit configured to quantize an input moving image signal using a set quantization scale; a coding unit configured to perform variable length coding on an output of the quantizing unit; an activity detecting unit configured to detect an activity of the input moving image signal; a quantization-scale determining unit configured to determine the quantization scale; a changing unit configured to change a value determined by the quantization-scale determining unit, and to set the changed value, as the quantization scale; and a filling level detecting unit configured to detect the filling level of a virtual buffer in a decoder which decodes the coded moving image signal, and to control the changing unit such that the degree of change in the quantization scale caused by use of the activity is reduced as the detected filling level decreases.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.