Moving-image signal encoding apparatus with variably selected quanitization step size
US5089888A · kind A · utility
55Cited by
2References
3Claims
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Assignee
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Key dates
| Filing date | Dec 14, 1990 |
| Grant date | Feb 18, 1992 |
| Priority date | — |
| Expiry date | Dec 14, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/91
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A moving-image signal encoding apparatus includes a transmission buffer memory. A first quantization step size for a normal block other than a refreshed block is determined on the basis of an occupied capacity of the buffer memory. A second quantization step size for the refreshed block is determined on the basis of the first quantization step size. A refreshment instruction signal is generated. One of the first quantization step size and the second quantization step size is selected in response to the refreshment instruction signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.