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Method, apparatus and system for data transmission

A data transmission method and a data transmission device technology, which are applied to transmission systems, channel allocation devices, baseband system components, etc., and can solve problems such as increased processing load and complex processing

Inactive Publication Date: 2004-07-21
NTT DOCOMO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This requires complicated processing and causes a problem of increased processing load

Method used

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  • Method, apparatus and system for data transmission
  • Method, apparatus and system for data transmission
  • Method, apparatus and system for data transmission

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Embodiment Construction

[0036] A preferred embodiment of the device of the invention will now be described with reference to the accompanying drawings. In the respective drawings, the same components are denoted by the same reference numerals to avoid repeated descriptions.

[0037] First, an embodiment of the present invention will be described. figure 1 is an example functional layout diagram of the data transmission device 1 in this embodiment. Such as figure 1 As shown, the data transmission device 1 includes a data input / output section 11, a multiplexing section 12A, a demultiplexing section 12B, a multilink frame construction section 13A, a multilink frame decoding section 13B, a decision section 14, and a channel input / output section 15. An example of the data transmission device 1 is a multimedia communication terminal used in a video conference system or a videophone system. The data transmission device 1 in this embodiment adopts the H.324 Annex H recommendation standardized by ITU-T...

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Abstract

The invention is aimed at improving the transmission efficiency of channels involved in multilink communication and reducing the load of processing. A first data transmission apparatus changes the number of transmission channels involved in multilink communication from 'x' to 'y', acquires SS (sampling size) and SPF (samples per frame) associated with the number of transmission channels 'y' from an SS / SPF table, generates multilink frames based on the acquired SS and SPF, and transmits them to a second data transmission apparatus. When it is detected that the number of transmission channels has been changed from 'x' to 'y', the second data transmission apparatus acquires the SS and SPF associated with the number of transmission channels 'y' from the SS / SPF table, generates multilink frames based on the acquired SS and SPF, and transmits them to the first data transmission apparatus.

Description

technical field [0001] The invention relates to a data transmission method, a data transmission device and a data transmission system. Background technique [0002] The H.32x recommendation series standardized by ITU-T (International Telecommunication Union-Telecommunication Standardization Sector) is known as a real-time video communication method for video telephony. According to this method, a plurality of data items such as video data and audio data are combined into one data item, which is then transmitted. Various extension models are defined in the H.32x series of recommendations. In one of the recommendations, the H.324 Annex H recommendation, multi-link communication using several links (channels) to transmit one data item is defined. For example, the technology associated with H.324 AnnexH is disclosed in an article titled "ITU-T Recommendation on CD-ROM (ITU-T Recommendation on CD-ROM)", Disc-2, T-REC-H .324-200011-I! Ann H! MSW-E.zip, November 2000 (zip file...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/00H04L25/14H04L29/08
CPCH04L25/14
Inventor 小林充山口博幸安达悟杉本和夫加藤祯笃
Owner NTT DOCOMO INC
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