Video data compression apparatus for recording and reproducing compressed video data at their various compressed data rates
US5612788A · kind A · utility
Assignees
Inventor
Key dates
| Filing date | May 18, 1994 |
| Grant date | Mar 18, 1997 |
| Priority date | — |
| Expiry date | May 18, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/124
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Apparatus for recording and reproducing video data is described that utilizes data compression to increase storage capacity. Real time input video data is decorrelated, quantized and entropy encoded. User control of a compression control parameter, such as quantization step width, is provided so that the user can adjust the loss of fidelity through compression to a desired level. The compressed data is output to a storage RAM 38 at an unregulated varying data rate. The system allows real time storage of video data in a manner in which the loss of fidelity is held constant and the amount of storage capacity required for particular sections of input video data varies with the information content of that input video data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.