Abstract: A duplex aware adaptive playout method includes detecting a packet communication mode as either a full-duplex mode or a half-duplex mode, calculating a playout delay for a current packet based on the detected packet communication mode, and delaying playout of the current packet by the calculated playout delay. When the packet communication mode is detected to be the half-duplex mode, the calculated playout delay for the current packet is set longer than when the packet communication mode is detected to be the full-duplex mode. A duplex aware adaptive communications device includes a playout buffer, a playout controller, a network delay estimator, and an active detector that detects a packet communication mode. The playout controller determines playout delays of packets in the playout buffer from estimated network delays and a detected packet communication mode being a full-duplex mode or a half-duplex mode.

Abstract: A codec aware adaptive playout method estimates playout delays for a current packet based on a loss mean opinion score (LMOS), a delay mean opinion score (DMOS), and a mean mean opinion score (MMOS) of packets with reference to the codec used in voice over Internet protocol (VoIP), streaming audio, and streaming video transmissions. The method selects an estimated playout delay having an optimum MMOS, or playout quality, from the plurality of estimated playout delays, and delays the playout of the current packet by the selected estimated playout delay. A codec aware adaptive playout device includes a playout controller for controlling playout of packets in a playout buffer. The playout controller references network delay estimates provided by a network delay estimator, and codec information such as the LMOS, DMOS, and MMOS provided by a codec detector to determine playout delays for the packets of the playout buffer.

Abstract: A method for objective playout quality measurement of a packet based network transmission includes determining a normalized total delay of a packet for playout and assigning a corresponding delay mean opinion score (DMOS) to the packet, then further determining a normalized packet loss rate of the packet and assigning a corresponding loss mean opinion score (LMOS) to the packet. The method includes averaging the DMOS and the LMOS to determine a mean mean opinion score (MMOS) of the packet and outputting the MMOS of the packet to a display device. The DMOS and LMOS can be assigned referencing continuous modeling equations or can be assigned referencing discrete value lookup tables. The method is performed by a processor.

Abstract: A system for network address port translation. The system comprises a storage device and a translation module. The storage device stores a plurality of private address tables and a private port table, wherein each private address table and private port table comprises at least one entry, and each entry is assigned an index number. The translation module, connected to the storage device, receives a private IP address and a private port number, wherein the private IP address comprises a plurality of private address subsets, stores the private address subsets and private port number as entries in the private address tables and the private port table, respectively, and translates the private IP address and port number to and from a public port number, wherein the public port number comprises a plurality of public port subsets corresponding to the index numbers in the private address tables and the private port table.

Abstract: A duplex aware adaptive playout method includes detecting a packet communication mode as either a full-duplex mode or a half-duplex mode, calculating a playout delay for a current packet based on the detected packet communication mode, and delaying playout of the current packet by the calculated playout delay. When the packet communication mode is detected to be the half-duplex mode, the calculated playout delay for the current packet is set longer than when the packet communication mode is detected to be the full-duplex mode. A duplex aware adaptive communications device includes a playout buffer, a playout controller, a network delay estimator, and an active detector that detects a packet communication mode. The playout controller determines playout delays of packets in the playout buffer from estimated network delays and a detected packet communication mode being a full-duplex mode or a half-duplex mode.

Abstract: A codec aware adaptive playout method estimates playout delays for a current packet based on a loss mean opinion score (LMOS), a delay mean opinion score (DMOS), and a mean mean opinion score (MMOS) of packets with reference to the codec used in voice over Internet protocol (VoIP), streaming audio, and streaming video transmissions. The method selects an estimated playout delay having an optimum MMOS, or playout quality, from the plurality of estimated playout delays, and delays the playout of the current packet by the selected estimated playout delay. A codec aware adaptive playout device includes a playout controller for controlling playout of packets in a playout buffer. The playout controller references network delay estimates provided by a network delay estimator, and codec information such as the LMOS, DMOS, and MMOS provided by a codec detector to determine playout delays for the packets of the playout buffer.

Abstract: A method for objective playout quality measurement of a packet based network transmission includes determining a normalized total delay of a packet for playout and assigning a corresponding delay mean opinion score (DMOS) to the packet, then further determining a normalized packet loss rate of the packet and assigning a corresponding loss mean opinion score (LMOS) to the packet. The method includes averaging the DMOS and the LMOS to determine a mean mean opinion score (MMOS) of the packet and outputting the MMOS of the packet to a display device. The DMOS and LMOS can be assigned referencing continuous modeling equations or can be assigned referencing discrete value lookup tables. The method is performed by a processor.