Buffer memory dispersion type video/audio transmission system with spatially and timewise divided inter-office junction lines
US4518989A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Sep 30, 1982 |
| Grant date | May 21, 1985 |
| Priority date | — |
| Expiry date | Sep 30, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S379/908
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A video/audio transmission system for sending video and audio information from the video and audio files of a center to a subscriber through a subscriber's junction line is disclosed in which at least one subcenter is disposed near to the subscriber to reduce the number of repeaters arranged on the subscriber's junction line. The subcenters can include a video/audio buffer memory, and exchange and other related circuits. The transmission lines for sending the video and audio information from the center to the sub-center are spatially divided into a plurality of groups in accordance with the sort of the video and audio information being sent, and further the information is time-divisionally transmitted at each group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.