Binary data compression and expansion processing apparatus
US4760461A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 24, 1987 |
| Grant date | Jul 26, 1988 |
| Priority date | — |
| Expiry date | Feb 24, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/4175
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
According to a binary data compression and expansion processing apparatus of this invention, a reference line data storage section for storing reference line data is separately provided from an image data memory. Binary data input through an input data bus is subjected to compression and expansion processing by a compression and expansion processing section in accordance with reference line data read out from the reference line data storage section, and the processed result is output to an external device through an output data bus. The compression and expansion processing section comprises a decoding processing section, for generating run length data corresponding to input encoded data in expansion processing, and a generation processing section, for generating image data in expansion processing. The decoding processing section and the generation processing section serve as stages of pipeline processing, whereby the apparatus receives data to be processed from the input data bus and unidirectionally executes processing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.