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Self adaptive multiple rate encoding and transmission method for voice

An adaptive multi-rate, voice technology, applied in voice analysis, radio/inductive link selection arrangement, instruments, etc., can solve the problem of 20 millisecond voice frame loss, etc.

Inactive Publication Date: 2005-08-03
CHINA RAILWAY SIGNAL & COMM SHANGHAI ENG BUREAU GRP +1
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AI Technical Summary

Problems solved by technology

It can be seen that, during the handover, some adaptive multi-rate (AMR) 20 ms voice frames are lost due to the variation of the physical channel

Method used

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  • Self adaptive multiple rate encoding and transmission method for voice
  • Self adaptive multiple rate encoding and transmission method for voice
  • Self adaptive multiple rate encoding and transmission method for voice

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Embodiment Construction

[0096] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0097] - Embodiment of generation and transmission of Adaptive Multi-Rate (AMR) coded frames by a mobile station

[0098] see figure 1, as shown in the embodiment therein, in the mobile station, the adaptive multi-rate (AMR) coder converts the voice from sound to electrical signal, after filtering, and then through sampling, the conversion from analog voice signal to digital voice signal 1 is realized Conversion, coding module is digital speech signal 1 coding by the mode of 20 milliseconds one frame, and coding module produces 1 speech frame coding sequence 2 every 20 milliseconds, and each speech frame coding sequence comprises: mode instruction, some self-adaptive multi-rate ( AMR) speech coded frame or 1 Adaptive Multi-Rate (AMR) silence frame. The mode indication gives the speech frame coding sequence and its adaptive multi-rate (AMR) ...

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Abstract

This invention relates to an adaptive multi-rate (AMR) code / decode and transmitting method in UMTS, which overcomes the short coming of losing AMR encode frames caused by switching in voice service, applies multimode AMR encode frame output method to configurate multi-voice transmission format combination and buffer store the AMR code frames, not discarding the delayed frames and set reduction for controlling AMR code mode at the wireless access network interface used in UMTS directly.

Description

technical field [0001] The invention relates to a method for performing adaptive and multi-rate encoding and transmitting data generated by the encoding in a Universal Mobile Telecommunications System (UMTS), in particular to a method for improving adaptive multi-rate (AMR) encoder encoding, A method for processing data output to an adaptive multi-rate (AMR) decoder, a method for accessing and controlling adaptive multi-rate (AMR) coded frames during a wireless access process, and a core network (CN) and wireless access A method of transporting Adaptive Multi-Rate (AMR) coded bits over the incoming network (RAN) interface. Background technique [0002] The Technical Specification (TS) of the Third Generation Partnership Project (3GPP) specifies the following provisions for the Adaptive Multi-Rate (AMR) encoder: [0003] — According to 3GPP TS26.071, the Adaptive Multi-Rate (AMR) encoder takes a voice signal in pulse code modulation (PCM) format with a precision of 13 bits a...

Claims

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Application Information

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IPC IPC(8): H04W4/16G10L19/24
Inventor 向为
Owner CHINA RAILWAY SIGNAL & COMM SHANGHAI ENG BUREAU GRP
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