Digital video signal recording and reproducing apparatus and method for setting a number of compression blocks according to different operational modes
US5550640A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 12, 1994 |
| Grant date | Aug 27, 1996 |
| Priority date | — |
| Expiry date | Jul 12, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/888
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A digital video signal recording and reproducing apparatus and method wherein a basic block is constituted by a plurality of pixels of video signals. A picture data compressing unit effects data compression of the video signals so that a compression data quantity after data compression becomes a constant with respect to a compression block constituted by a plurality of the basic blocks, and the compressed data o the video signals are recorded on a data recording medium. A compression block setting sets a number of the basic blocks to constitute the compression block in response to different operation modes of the digital video signal recording and reproducing apparatus which are different in at least one of resolution of the video signals, recording time and data compression system, and controls the picture data compressing unit so that the number of the compression blocks of the video signals recorded on one track of the data recording medium after data compression by the picture data compressing unit becomes M in a first operation mode, where M is a positive integer, and the number of the compression blocks becomes a positive integer in each of the other operation modes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.