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Voice recording method and device for railway locomotive

A recording device, voice technology, applied in speech analysis, speech recognition, special data processing applications, etc., can solve the problems of slow dump speed, poor recording quality, no automatic gain control, etc.

Active Publication Date: 2006-09-13
HUNAN CRRC TIMES SIGNAL & COMM CO LTD
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a kind of ARM control, DSP voice coding compression technology as the Core locomotive voice recording method and device

Method used

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  • Voice recording method and device for railway locomotive

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Embodiment Construction

[0017] Such as figure 1 Shown, a kind of voice recording method that is applied to railway locomotive is characterized in that it comprises the following steps:

[0018] The first step is to collect the AC audio signal of the radio station and isolate it, differentially amplify it, perform automatic gain control, A / D analog-to-digital conversion on weak and small signals, buffer the signal through the FPGA logic buffer, and send it to the DSPDSP voice encoding / decoding operation The controller performs audio encoding and compression;

[0019] In the second step, under the control of the ARM main control module, communicate with the monitoring device through the CAN and 485 buses, and obtain the coded compressed audio signal obtained in the first step in the form of a file based on the monitoring time and the kilometer mark. In FLASH memory;

[0020] In the third step, the audio signal file in the FLASH memory described in the second step is dumped to the target memory throug...

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Abstract

A method for recording pronunciation used in track locomotive includes carrying out A / D conversion on radio station pronunciation signal under control internal logic control unit in FPGA logic buffer with its output end being connected to corresponding port of DSP pronunciation coding / decoding operation controller, carrying out data exchange with internal double port RAM of FPGA by DPS data port, storing audio data in pronunciation file mode into NAND FLASH storage circuit under control of ARM master control module. The device for realizing said method is also disclosed.

Description

technical field [0001] The invention belongs to the technical field of railway locomotive safety equipment control, and in particular relates to a voice recording method and device applied to railway locomotives, which integrates high-quality recording, playback, and fast dump retrieval. Background technique [0002] At present, the voice recording and playback methods commonly used in most series of railway locomotive safety driving equipment are as follows: [0003] Recording: For most series of recording safety driving equipment, the recording method is simple, by detecting the AC audio signal of the recording interface; there is no distinction between the effective audio signal and the noise signal, the recording effect is poor, and when the noise is serious, the flight attendant's vehicle-machine joint control, etc. The original audio signal will be drowned out by noise. [0004] Dump: After the fifth major speed increase, the locomotive running traffic is extended, th...

Claims

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Application Information

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IPC IPC(8): G10L15/00G10L19/00G06F17/00B61L99/00
Inventor 唐斌聂火勇
Owner HUNAN CRRC TIMES SIGNAL & COMM CO LTD
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