How to use Google Speech API Asynchronous Speech Recognition in Android

Question

I want to convert recorded audio files speech to text. I'm trying to use Google Speech API using Asynchronous Speech Recognition.

I have few question on how to proceed.

1 . I want to convert audio text and don't want it in real-time. So I should use Asynchronous recgonition ?
Google sample project uses SpeechGrpc. Is it necessary to use in android ASychronous speech recognition? Or I can use SpeechClient After authentication ..How?

2 . SpeechGrpc (com.google.cloud.speech.v1.SpeechGrpc) is not present in my package ! (com.google.cloud.speech.v1). I'll have to install it from here? grpc.io

3 . I used Google Cloud Platform Console API key to authenticate to the Speech API (ManagedChannel object) but I cant understand how to use it and which function to use for Asynchronous Speech Recognition.

// Authentication 

try {
                GoogleCredentials creds = GoogleCredentials.fromStream(stream);
                creds = creds.createScoped(SCOPE);
                mChannel = ManagedChannelBuilder.forAddress(HOSTNAME, PORT)
                        .intercept(new ClientAuthInterceptor(creds, Executors.newSingleThreadExecutor()))
                        .build();
            }catch (IOException e){
                Log.e(TAG, "Failed to create channel.", e);
            }

So what should I do after authentication. Is there any code reference or documentation for Asynchronous Speech Recognition in android.

rishavjalan rishavjalan · Accepted Answer · 2017-11-27T11:43:00

Yes you would need to use Asynchronous request.

You need to upload files to google cloud storage if they are longer than a minute. https://cloud.google.com/speech/quotas "* Audio longer than ~1 minute must use the uri field to reference an audio file in Google Cloud Storage."

I use the implementation on the sample project and it works pretty well, i would recommend using SpeechGrpc with longRunningRecognize for the request.

You can use the json credential file if using SpeechGrpc by reading the file stream and then using GoogleCredentials to authenticate.

How to use Google Speech API Asynchronous Speech Recognition in Android

1 Answers