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Synchronization data generation and analysis method for voice band compression system

A compression system and voice band technology, applied in multi-frequency code systems, synchronization devices, transmission systems, etc., can solve the problem of linear prediction filters that cannot penetrate the frequency band compression system, synchronization sequences that do not have speech and audio features, and cannot achieve dual Accurate synchronization of the terminal, etc., to improve the adaptability of the platform, reduce the amount of calculation, and prevent false synchronization.

Inactive Publication Date: 2016-07-20
BEIJING MIER TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Directly introducing the synchronization sequence in the packet domain data transmission into the voice channel of the circuit domain will cause a problem, that is, the synchronization sequence does not have the characteristics of voice and audio, and cannot penetrate the linear prediction filter of the frequency band compression system, and cannot achieve accurate synchronization of both ends , no practical value

Method used

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  • Synchronization data generation and analysis method for voice band compression system
  • Synchronization data generation and analysis method for voice band compression system
  • Synchronization data generation and analysis method for voice band compression system

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Embodiment Construction

[0017] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0018] figure 1 It is a flow chart of a method for synchronizing data used in a voiceband compression system provided by an embodiment of the present invention.

[0019] refer to figure 1 , step S1, obtaining a pseudo-random synchronization sequence.

[0020] Here, all kinds of mobile voice band compression systems can better transmit the characteristics of the single-tone signal of the gene segment of the voice band. Using this feature, the conforming single-tone sequence of the base segment of the voice band is constructed for precise synchronization, which is called the full spectrum Synchronization sequence, abbreviated as AFSS. AFSS shows that the zero crossing points gradually increase in the time domain, a...

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Abstract

The invention relates to a synchronization data generation and analysis method for a voice band compression system. The method comprises that a pseudo random synchronization sequence is obtained; the pseudo random synchronization sequence is inserted into modulation data to obtain a transmission data flow, and the modulation data comprises non voice data; the voice band compression system compresses the audio frequency band of the transmission data flow to obtain a compressed transmission data flow, and the compressed transmission data flow is sent a second client via mobile communication network. The method also comprises that the compressed transmission data flow from a first client is received via the mobile communication network, and decompressed audio data is inserted to the tail of a transmission data flow to be analyzed; and synchronization analysis is carried out on the transmission data flow to be analyzed to obtain a synchronization position; and the non voice data is demodulated via the synchronization position. According to the method of the invention, the precision of the synchronization position of the data synchronization sequence can be ensured, the operand of the synchronization sequence analysis method can be reduced substantially, and the method is suitable for more types of processor platforms.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a synchronous data generating and analyzing method used in a voice band compression system. Background technique [0002] A voice call includes a circuit domain transmission channel and a packet domain transmission channel. Common methods of transmission channels in the circuit domain include fixed telephones and mobile phones, etc.; the transmission method in the packet domain is the method of network voice chat that has become popular in the past ten years. The circuit domain transmission channel is still the mainstream voice call transmission channel at this stage. In order to reliably and efficiently transmit non-voice data in the circuit domain voice channel, data synchronization must be introduced to ensure that the two parties can communicate after the data passes through the voice band compression / decompression system. Do data alignment. Directly introducing the sync...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04W56/00H04L29/06
CPCH04L27/2655H04L27/2665H04L27/2669H04L65/1069H04W56/002H04L65/401
Inventor 叶达王斌国
Owner BEIJING MIER TECH CO LTD
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