Method and system for supporting constant bit rate encoded MPEG-2 transport over local ATM networks
US5742599A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 26, 1996 |
| Grant date | Apr 21, 1998 |
| Priority date | — |
| Expiry date | Feb 26, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2012/5658
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system and method for supporting constant bit rate encoded MPEG-2 transport over local Asynchronous Transfer Mode (ATM) networks. The present invention encapsulates constant bit rate encoded MPEG-2 transport packets, which are 188 bytes is size, in an ATM AAL-5 Protocol Data Unit (PDU), which is 65,535 bytes in size. The method and system includes inserting a plurality of MPEG-2 transport packets into a single AAL-5 PDU, inserting a segment trailer into the ATM packet after every two MPEG packets, and then inserting an ATM trailer at the end of the ATM packet. In a preferred embodiment, 10 or 12 MPEG-2 transport packets are packed into one AAL-5 PDU to yield a throughput 70.36 and 78.98 Mbits/sec, respectively, thereby supporting fast forward and backward playing of MPEG-2 movies via ATM networks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.