DATA TRANSMISSION APPARATUS, DATA RECEIVING APPARATUS, AND DATA TRANSMITTING-RECEIVING METHOD
First Claim
1. A data receiving apparatus comprising:
- a reception section that receives packet data;
a loss decision section that decides whether or not there is missing packet data among the received packet data;
a playback time calculation section that calculates a playback time of the missing packet data;
a retransmission request decision section that decides whether to transmit an immediate retransmission request or a usual retransmission request for the missing packet data, based on a round trip time of data between the data receiving apparatus and a transmission side, a current time and the playback time; and
a retransmission request section that transmits the immediate retransmission request or the usual retransmission request.
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Accused Products
Abstract
Received packets are preserved in a receiving buffer 102; a playback decision section 103 decides whether the preserved packets are in time for the playback time or not; the playback orders and the preservation addresses of the preserved packets which have been decided to be in time are memorized in a pointer 104 for playback; the preserved packets are read and played back according to the pointer 104 for playback. And, the playback orders and the preservation addresses of the preserved packets are memorized in a pointer 106 for preservation; and a media conversion section 107 reads the preserved packets according to the pointer 106 for preservation, and memorizes them after conversion into packets with a form by which the packets may be memorized in a preservation memory 108.
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Citations
4 Claims
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1. A data receiving apparatus comprising:
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a reception section that receives packet data;
a loss decision section that decides whether or not there is missing packet data among the received packet data;
a playback time calculation section that calculates a playback time of the missing packet data;
a retransmission request decision section that decides whether to transmit an immediate retransmission request or a usual retransmission request for the missing packet data, based on a round trip time of data between the data receiving apparatus and a transmission side, a current time and the playback time; and
a retransmission request section that transmits the immediate retransmission request or the usual retransmission request. - View Dependent Claims (2, 3, 4)
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Specification