Method and apparatus for the distribution of multi-media documents
US5790937A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 19, 1996 |
| Grant date | Aug 4, 1998 |
| Priority date | — |
| Expiry date | Jan 19, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/4181
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Multi-media documents, in the form of digital signals, are fed into a multiplexer/coder by several sub-channels, which are time multiplexed. A control signal is added and the combined signal is modulated into a transmission signal at the transmitter side. At the receiver side, the transmission signal is processed up to the output of a tuner like a normal signal for television. After the tuner, the signal is demodulated, digitized, demultiplexed, and the control information of the control signal is extracted from the bit stream so that by monitoring said control information signal provided with the transmission, a transmission channel decoder enables a multi-media player to read a distributed document according to the program of the user. Alternately, the signal is directly stored by a multi-media player and the stored signal is demodulated, digitized, demultiplexed and the control information of the control signal is extracted from the bit stream so that by monitoring the control information signal provided with the transmission, a transmission channel decoder controls a reproduction device for reproducing a distributed document according to the programming of the user.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.