Protocol and procedure for automated channel change in an MPEG-2 compliant datastream
US6078594A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 26, 1997 |
| Grant date | Jun 20, 2000 |
| Priority date | — |
| Expiry date | Sep 26, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/4384
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of changing the channels in a digital video and audio receiving system. The method includes receiving and decoding the encoded digital video and audio in a decoder, where the input is a multi-channel, time division multiplexed digital video and digital audio datastream. The datastream contains many Programs, each of the Programs includes a video packetized elementary stream, and an audio packetized elementary stream, each of which, in turn, contains a packet header, and packet data. The channel change method is a process of changing input channels from an old channel datastream to a new channel datastream with a minimum of latency. The method includes setting appropriate flags to request the channel change, acknowledging the requests, flushing buffers, muting audio output and/or freezing video output, and activating a data request line for new channel bitstream data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.