DISTRIBUTION DEVICE FOR TRANSMISSION PACKETS

摘要

A distribution device for transmission packets is provided which distributes, by multicast or unicast, content stream data to a terminal via a communication path. The content stream data comprises closed GOPs that include at least video data and audio data, and is configured hierarchically using a first multiplexed packet stream and a second multiplexed packet stream. The first multiplexed packet stream is configured such that a group of Nα1 closed GOPs in order from a head is in turn Mβ-multiplexed into a plurality of GOP groups in terms of a GOP. The second multiplexed packet stream is configured such that a group of Nα2 closed GOPs in order from a head is in turn Mβ-multiplexed into a plurality of GOP groups in terms of a closed GOP. The first multiplexed packet stream and the second multiplexed packet stream are distributed by multicast or unicast with a certain time difference.

主权项

1. A distribution device for transmission packets, the distribution device distributing, by multicast or unicast, content stream data to a terminal via a communication path, the content stream data comprising closed GOPs that include at least video data and audio data, the distribution device comprising:
a first conversion means that converts the content stream data to a first multiplexed packet stream so that a group of Nα1 closed GOPs in order from a head is in turn multiplexed into a plurality of GOP groups in terms of a closed GOP; a second conversion means that converts the content stream data to a second multiplexed packet stream so that a group of Nα2 closed GOPs in order from a head is in turn multiplexed into a plurality of GOP groups in terms of a closed GOP; and a distribution means that distributes the first multiplexed packet stream and the second multiplexed packet stream with a time difference corresponding to the Nα2 closed GOPs, where Nα1 and Nα2 are natural numbers, Nα1