Method of recording and reproducing multi-channel information on and from recording medium
US4920424A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 26, 1988 |
| Grant date | Apr 24, 1990 |
| Priority date | — |
| Expiry date | May 26, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/9205
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of recording N-channel video signals and M-channel audio signals (N, M being natural numbers) includes the steps of periodically extracting the video signal for one unit period, thereby thinning out the video signal, for each of the N-channel video signals, in turn combining the extracted video signals by a time division multiplexing operation. The method also includes the step of coding each of the M-channel audio signals to form M code trains, compressing in time each of the M code trains by a factor of 1/M or less and dividing each of the M code trains into a plurality of blocks, successively combining each block from the M code trains by a time division multiplexing operation. The video and audio signal obtained by the above multiplex operations are recorded on a single recording medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.