Communication system and method capable of avoiding congestion in moving image data transmission
First Claim
1. A communication system capable of avoiding congestion in transmission of moving image data, comprising:
- at least one receiving terminal;
a moving image delivery device for delivering moving image data to said at least one receiving terminal;
a moving image conversion device including at least one moving image conversion means for converting, in accordance with conversion parameters, the moving image data sent from said moving image delivery device, a conversion parameter setting means for determining the conversion parameters, and a monitored result receiving means; and
at least one packet switching node including at least one data storage means for preliminarily storing the moving image data from said moving image conversion device to be sent to said at least one receiving terminal, a data amount monitor means for monitoring an amount of the moving image data stored in said at least one data storage means to judge that the monitored data amount reaches a first threshold, and a monitored result sending means for sending a congestion preview information to said moving image conversion device when said data amount monitor means judges that the monitored data amount reaches the first threshold,said monitored result receiving means receiving the congestion preview information from said monitored result sending means, said conversion parameter setting means determining the conversion parameters so that said moving image conversion means converts the moving image data sent from said moving image delivery device into a moving image data with a smaller coding bit rate smaller.
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Abstract
A communication system capable of avoiding congestion in transmission of moving image data, includes (1) at least one receiving terminal, (2) a moving image delivery device for delivering moving image data to the at least one receiving terminal, (3) a moving image conversion device which has at least one moving image conversion unit for converting, in accordance with conversion parameters, the moving image data sent from the moving image delivery device, a conversion parameter setting unit for determining the conversion parameters, and a monitored result receiving unit, and (4) at least one packet switching node which has at least one data storage unit for preliminarily storing the moving image data from the moving image conversion device to be sent to the at least one receiving terminal, a data amount monitor unit for monitoring an amount of the moving image data stored in the at least one data storage unit to judge that the monitored data amount reaches a first threshold, and a monitored result sending unit for sending a congestion preview information to the moving image conversion device when the data amount monitor unit judges that the monitored data amount reaches the first threshold. The monitored result receiving unit receives the congestion preview information from the monitored result sending unit, and the conversion parameter setting unit determines the conversion parameters so that the moving image conversion unit converts the moving image data sent from the moving image delivery device into a moving image data with a smaller coding bit rate.
30 Citations
20 Claims
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1. A communication system capable of avoiding congestion in transmission of moving image data, comprising:
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at least one receiving terminal; a moving image delivery device for delivering moving image data to said at least one receiving terminal; a moving image conversion device including at least one moving image conversion means for converting, in accordance with conversion parameters, the moving image data sent from said moving image delivery device, a conversion parameter setting means for determining the conversion parameters, and a monitored result receiving means; and at least one packet switching node including at least one data storage means for preliminarily storing the moving image data from said moving image conversion device to be sent to said at least one receiving terminal, a data amount monitor means for monitoring an amount of the moving image data stored in said at least one data storage means to judge that the monitored data amount reaches a first threshold, and a monitored result sending means for sending a congestion preview information to said moving image conversion device when said data amount monitor means judges that the monitored data amount reaches the first threshold, said monitored result receiving means receiving the congestion preview information from said monitored result sending means, said conversion parameter setting means determining the conversion parameters so that said moving image conversion means converts the moving image data sent from said moving image delivery device into a moving image data with a smaller coding bit rate smaller. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A communication method capable of avoiding congestion in transmission of moving image data, comprising the steps of:
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converting moving image data to be delivered to at least one receiving terminal, in accordance with conversion parameters; preliminarily storing the converted moving image data to be sent to said at least one receiving terminal; monitoring an amount of the stored moving image data to judge that the monitored data amount reaches a first threshold; sending a congestion preview information when it is judge that the monitored data amount reaches the first threshold; receiving the sent congestion preview information; and determining the conversion parameters so that said converting step converts the moving image data into a moving image data with a smaller coding bit rate. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification