Digital recording and reproducing apparatus for television signal
US4633330A · kind A · utility
21Cited by
3References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 13, 1984 |
| Grant date | Dec 30, 1986 |
| Priority date | — |
| Expiry date | Jun 13, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/8081
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Disclosed is a digital recording and reproducing apparatus for television signal, which is designed to record and reproduce by sampling a television signal at a frequency lower than the Nyquist frequency, by dividing the sampled signal into blocks each of which is composed of adjacent plural sampling points, by orthogonally transforming in each block, and by subjecting the orthogonally transformed signal to weighted quantizing. The apparatus has achieved the reduction of recording bit and decrease of error propagation rate simultaneously so as to be applicable to recording and reproduction even in a home use VTR.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.