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Overview

This document will guide developer using the real-time voice translation SDK (RTVT) from LiveData, to implement translation services in real-time voice scenarios.

Integration

Service Activation

To integration the LiveData RTVT SDK, you need to register an personal/enterprise account from LiveData official website (https://www.ilivedata.com/) , create a real-time voice translation service project and update the corresponding project parameters in SDK.

Requirements

Audio format : Only PCM format is supported
Sampling rate: 16KHz
Encoding: 16-bit depth
Channels: Monaural

Integrate dependencies

Import the following dependency libraries：

<script src="libs/msgpack.min.js"></script>
<script src="libs/md5.min.js"></script>
<script src="libs/int64.min.js"></script>
<script src="libs/crypto-js.min.js"></script>
<script src="libs/fpnn.min.js"></script>
<script src="dist/rtvt.sdk.min.js"></script>

Initialization

let rtvtClient = new RTVTClient({
    endpoint: endpoint,
    pid: pid,
    uid: uid,
});

Parameter	Type	M/O	Description
endpoint	string	M	endpoint （check from LiveData Console service configuration）
pid	long	M	project ID
uid	string	O	user id, input as needed.

login(token, ts, callback);

Parameter	Type	M/O	Description
token	string	M	Refer to the following text for the method of token generation
ts	int	M	token reference timestamp

Start translate

createStream(srcLang, destLang, asrResult, tempResult, transResult, callback);

Parameter	Type	M/O	Description
srcLang	string	M	source language
destLang	string	M	target language
asrResult	boolean	M	Set whether the final result of voice recognition is needed. The default is false.
tempResult	boolean	M	Set whether the temporary result of voice recognition is needed. The default is false.
transResult	boolean	M	Set whether the final result of translate is needed. The default is true.

When there are recognition results, if asrResult is set to true, callback will be triggered:

rtvtClient.on("recognizedResult", data);

When there are translate results, if transResult is set to true, callback will be triggered:

rtvtClient.on("translatedResult", data);

When there are recognized results, if asrResult is set to true, and tempResult is set to true, callback will be triggered:

rtvtClient.on("recognizedTempResult", data);

When there are translate results, if transResult is set to true, and tempResult is set to true, callback will be triggered:

rtvtClient.on("translatedTempResult", data);

Send voice clip

rtvtClient.sendVoice(stream, seq, pcm);

Parameter	Type	M/O	Description
stream	long	M	stream ID
seq	long	M	audio segment sequence number (preferably in order)
pcm	byte	M	audio data，default of 640 bytes

Stop translate

stopAllStreams();

Close RTVT

destory();

Token generate

Please refer to the following code example for the method of token generation:

var pid = pid;
var key = key;
var ts = parseInt(new Date().getTime() / 1000);
var coreString = pid + ":" + ts;
var token = CryptoJS.enc.Base64.stringify(CryptoJS.HmacSHA256(coreString, atob(key)));

More information

For SDK download and more information, please go to Github。

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