Method for processing encoded data in interconnecting different types of communication networks, and gateway apparatus

Abstract

In a gateway apparatus for interconnecting different types of communication networks that are a line network and a packet network, a method and an apparatus for eliminating sound interruptions that would otherwise occur due to delay or loss of sound encoded data, minimizing the degradation of sound quality, and maintaining a short delay for telephone communication. A sound data processing circuit (550) of the gateway apparatus compares an expected value of the number of sound encoded data as expected outputs to be developed from a multiplexed-data separating circuit (200) in a unit period with the actual number of sound encoded data. If the actual number of sound encoded data is below the expected value, then the sound data processing circuit (550) generates encoded data for causing a destination terminal to execute an error encapsulation, and packetizes and transmits the generated encoded data together with the sound encoded data to the packet network from a transmission circuit (801). If acquiring no sound data from a reception circuit of the packet network in a given period, the sound data processing circuit (550) generates a signal indicative of no acquisition, selects either generation or disposal of the encoded data, and sends the signal to the line network from a data multiplexing circuit (900) and a line network terminating circuit (100).

Description

technical field [0001] The present invention relates to a method and device for processing coded data, and in particular to a processing method for coded data in a gateway device that connects heterogeneous communication networks represented by communication between a line network and an information packet network such as an IP network. Applicable methods and devices. Background technique [0002] In the case of bidirectional communication by connecting a line network and a packet network such as an IP (Internet Protocol) network, by setting control information, image coding information, and audio coding information in a data format based on one communication network Realized by a gateway device that converts various data into the data format of the other party's communication network. At this time, the data including various information is only subjected to protocol conversion processing in the gateway device, or if necessary, code conversion processing is performed in ord...

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Problems solved by technology

In this case, the delay fluctuations in the packet network also rush together, and the terminal (not shown) on the packet network side of the transmission destination cannot sufficiently absorb the delay fluctuations, resulting in interruption of sound, etc., resulting in deterioration of sound quality. deterioration

[0018] In addition, in the direction from the packet network to the line network, as described in the above-mentioned Patent Documents 3 and 5, in order to absorb delay fluctuations in the packet network, for example, in the Figure 12 In the receiving circuit 802, or between the receiving circuit 802 and the data processing circuit 500, if a fluctuation absorbing buffer for absorbing delay fluctuations is provided, this buffer will increase the voice delay between the terminals of the two communication networks.

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