초록 ▼

A system for dynamically jitter buffering a sequence of packets based on substantially synchronized time signals maintained at the transmitting and receiving ends of a communication system. The time signals may be synchronized, for instance, by equipping both the transmitting and receiving ends with

A system for dynamically jitter buffering a sequence of packets based on substantially synchronized time signals maintained at the transmitting and receiving ends of a communication system. The time signals may be synchronized, for instance, by equipping both the transmitting and receiving ends with global positioning system receivers. The transmitting end may mark each outgoing packet with a sender-time based on the time signal at the transmitting end. Dynamic jitter buffering may then be provided by scheduling delayed play-out of each packet. For instance, the jitter buffer at the receiving end may be configured to delay play-out of each packet until the time signal at the receiving end indicates a time that is substantially a predetermined end-to-end delay period after the sender-time for the packet.

대표청구항 ▼

1. In a packet switched network in which a real-time media signal is encoded into a sequence of packets and the packets are sequentially transmitted over the network from a transmitting-end and destined for a receiving-end, each packet being marked at the transmitting-end with a sender-time based on

1. In a packet switched network in which a real-time media signal is encoded into a sequence of packets and the packets are sequentially transmitted over the network from a transmitting-end and destined for a receiving-end, each packet being marked at the transmitting-end with a sender-time based on a first clock signal at the transmitting-end, a method of improving end-to-end communication of said real-time media signal comprising, in combination, at said receiving-end:maintaining a second clock signal substantially synchronized to the first clock signal, so that the second clock signal reflects substantially the same time as the first clock signal; and for each of at least a plurality of incoming packets, retaining said packet for a buffer period, and releasing said packet for play-out in response to said second clock signal indicating a time that is substantially a predetermined delay period after said sender-time.