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Gateway system

A gateway and short packet technology, which is applied in the field of gateway systems, can solve the problems of inability to judge the loss of short packets and difficult to maintain call quality, etc.

Inactive Publication Date: 2005-04-27
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the gateway system that supports the conventional hierarchical method, because only the sequence number is added to the IP packet, for example, when the IP packet is lost, it cannot be judged whether the short packet corresponding to the call is lost or not.
Therefore, appropriate packet loss processing cannot be performed, and there is a problem that it is difficult to maintain call quality

Method used

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Embodiment 1

[0020] figure 1 It is a configuration diagram showing a gateway system according to Embodiment 1 of the present invention. exist figure 1 Among them, the short packet combination unit 10 is a device that converts input audio into encoded frames to generate payload data, and on the other hand, generates sequence signals and combines short packet headers to assemble short packets. The audio coding unit 11 performs audio coding processing of the audio signal, and outputs the encoded audio signal. The encoded frame counting section 21 counts the number of frames (encoded frames) of the encoded audio signal output from the audio encoding section 11, and outputs the counted number. The sequence mark generating unit 12 generates a sequence mark based on the count number output by the encoded frame counting unit 21 . The short packet header combination unit 13 generates a short packet header based on the sequence code generated by the sequence code generation portion 12 and outputs...

Embodiment 2

[0032] Figure 4 It is a configuration diagram showing a gateway system according to Embodiment 2 of the present invention. exist Figure 4 Among them, the audio coding type determination section 22 outputs to the order mark generation section 12 the type of the audio coding method used when the audio coding section 11 encodes the input audio signal. The audio coding type determining unit 42 determines the audio encoding type based on the order code extracted from the short packet header by the short packet header decomposing unit 34, and outputs the audio encoding type information to the audio decoding unit 35. Furthermore, in Figure 4 In , the same components as those in Embodiment 1 are denoted by the same symbols, and description thereof will be omitted.

[0033]The related operations are described below. The audio encoding unit 11 performs audio encoding processing on the input audio signal, and outputs the encoded audio signal as a result of the processing to the sh...

Embodiment 3

[0041] Figure 6 It is a configuration diagram showing a gateway system according to Embodiment 3 of the present invention. Example 3 is a combination of Example 1 and Example 2, and the same components are denoted by the same symbols, and descriptions thereof are omitted.

[0042] The related operations are described below. The audio encoding section 11 performs audio encoding processing on the input audio signal, and outputs the encoded audio signal as a result of the processing to the short packet combining section 14, the encoded frame counting section 21, and the audio encoding type determining section 22. The encoded frame counting section 21 counts the number of encoded frames of the encoded audio signal, and outputs the count to the sequence mark generating section 12 . The audio coding type determining unit 22 determines the type of the audio encoding method used in the audio encoding process based on the information from the audio encoding unit 11, and outputs the ...

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Abstract

In a gateway system supporting a layered packet system, a packet loss in each short packet is detected. A sending-side gateway system and a receiving-side gateway system are provided in which an IP packet is assembled from short packets each including therein a short packet header which contains a sequence sign for each short packet having information for identifying a voice encoding method used at an encoding side, start information indicative of the start of an active voice part containing voice data, and number information indicative of the number of encoded voice signals.

Description

technical field [0001] The present invention relates to a gateway system such as an audio transmission device for transmitting signals such as audio signals using IP packets, and particularly relates to a transmission format for short packets used therein. Background technique [0002] As a method of transmitting audio information signals using the Internet protocol (hereinafter referred to as "IP"), a method of packetizing each audio information signal and attaching an IP packet header to the packets is used. However, the IP used here has poor reliability because it is a connectionless protocol. Therefore, in order to compensate for this problem, the packet communication device on the sending side generally sets a sequence number field on the IP packet according to the order of the packets to be sent, and sends the packet after adding a number for checking continuity to this field. The packet communication device on the receiving side refers to the sequence number field of...

Claims

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Application Information

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IPC IPC(8): H04L47/43H04LH04L1/00H04L25/56
CPCH04L69/16H04L69/161H04L49/90H04L69/22H04L69/169H04L1/0083H04L49/9094
Inventor 伏见涉铃木茂明
Owner MITSUBISHI ELECTRIC CORP
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