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Method for implementing multi-language coding-decoding in universal mobile communication system

A telecommunication system, coding and decoding technology, applied in voice analysis, radio/inductive link selection arrangement, unauthorized/fraudulent telephone prevention, etc., can solve the problem of occupying a large storage space, achieve storage space, improve Achieve efficiency and reduce the effect of realizing cost

Inactive Publication Date: 2004-01-28
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of the above-mentioned existence, and under the premise of ensuring that the voice quality remains unchanged, based on a voice codec algorithm, the 7 kinds of voice codecs defined by all UMTS system narrowband voice services are uniformly realized, so as to significantly improve the UMTS system. Economy and Realization of Speech Codec and Solve the Problem of Occupying Large Storage Space

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  • Method for implementing multi-language coding-decoding in universal mobile communication system
  • Method for implementing multi-language coding-decoding in universal mobile communication system
  • Method for implementing multi-language coding-decoding in universal mobile communication system

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Embodiment Construction

[0023] The method for realizing multiple speech codecs in the universal mobile telecommunication system described in the present invention is realized by the following technical solutions. Among the above-mentioned 7 kinds of speech codec algorithms, HR AMR, FRAMR, UMTS AMR and UMTS AMR 2 The core of the algorithm is based on the adaptive multi-rate algorithm, and its principle and structure are the same, but the rate control range of the algorithm is different because of the different application environments. Moreover, it is clearly stated in the agreement that UMTS AMR 2 is fully compatible with HR AMR, FR AMR, and UMTS AMR. Therefore, the HSAMR, FR AMR, and UMTS AMR can be uniformly implemented using the UMTS AMR 2 protocol.

[0024] The AMR algorithm is a multi-rate speech codec algorithm, with a total of 8 modes (AMR_12.20, AMR_10.20, AMR_7.95, AMR_7.40, AMR_6.70, AMR_5.90, AMR_5.15, AMR_4.75), Corresponding to 8 kinds of rates (12.20kbit / s (GSM EFR), 0.20kbit / s, 7.95kb...

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Abstract

This invention discloses a method of realizing multi-phoneme code / decode in mobile telecommunication system containing first selecting a rate mode according to coding type to call unified AMR phoneme code / decode module to output phonetic code bit according to the definite rate if it is not mure, or to select each comfortable noise generating and discontinuous transmitting modules to output mute code bit if it is mute. Decode is the inversion of code by adding an error frame compensation and a mute process progress only and output a unified 13 bit linear PCM data. On the bases of ensuring phonetic quality, 7 phonetic code / decode defined by all UMTS system narrowband phonetic service realized uniformly based on a phonetic code / decode algorithm.

Description

technical field [0001] The invention relates to a voice coding and decoding technology, and more particularly relates to a method for uniformly realizing multiple voice coding and decoding in a universal mobile telecommunication system (UMTS). Background technique [0002] The voice codec TC (Transcoder) is the basis for the UMTS system to realize the voice bearer service. It is not only indispensable on the user equipment (UE), but also a functional entity that must be used in the voice bearer equipment in the core network at the present stage. The 3GPP standard organization defines 7 voice codecs for UMTS system to realize narrowband voice services: GSM system enhanced full rate codec (GSM EFR), TDMA system enhanced full rate codec (TDMA EFR), PDC system enhanced full rate codec codec (PDC EFR), half-rate AMR speech codec (HR AMR), full-rate AMR speech codec (FR AMR), UMTS system AMR speech codec (UMTS AMR), UMTS system AMR speech codec standard 2 (UMTS AMR 2) (see 3GPP ...

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Application Information

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IPC IPC(8): G10L19/00G10L19/14G10L19/18G10L19/24G10L21/02H04M1/66
Inventor 周亮
Owner HUAWEI TECH CO LTD