AWS SDK Version 4 for .NET
API Reference

AWS services or capabilities described in AWS Documentation may vary by region/location. Click Getting Started with Amazon AWS to see specific differences applicable to the China (Beijing) Region.

Container for the parameters to the StartStreamTranscription operation. Starts a bidirectional HTTP/2 or WebSocket stream where audio is streamed to Amazon Transcribe and the transcription results are streamed to your application.

The following parameters are required:

For more information on streaming with Amazon Transcribe, see Transcribing streaming audio.

Inheritance Hierarchy

System.Object
  Amazon.Runtime.AmazonWebServiceRequest
    Amazon.TranscribeStreaming.AmazonTranscribeStreamingRequest
      Amazon.TranscribeStreaming.Model.StartStreamTranscriptionRequest

Namespace: Amazon.TranscribeStreaming.Model
Assembly: AWSSDK.TranscribeStreaming.dll
Version: 3.x.y.z

Syntax

C#
public class StartStreamTranscriptionRequest : AmazonTranscribeStreamingRequest
         IAmazonWebServiceRequest

The StartStreamTranscriptionRequest type exposes the following members

Constructors

Properties

NameTypeDescription
Public Property AudioStreamPublisher System.Func<System.Threading.Tasks.Task<Amazon.TranscribeStreaming.Model.IAudioStreamEvent>>

Gets and sets the property AudioStreamPublisher.

An encoded stream of audio blobs. Audio streams are encoded as either HTTP/2 or WebSocket data frames.

For more information, see Transcribing streaming audio.

The Func set for this property by the consumer of the SDK is used to stream events into the service. Consumers provide a Func that the SDK will continue to call to get events to send. When the consumer is done streaming events to the service the Func can return null to stop the SDK calling the Func for new events. The Func must return an event known by the service which can be identified by implementing the IAudioStreamEvent interface. The known implementatons in the SDK for this interface are: Amazon.TranscribeStreaming.Model.AudioEvent Amazon.TranscribeStreaming.Model.ConfigurationEvent

Public Property ContentIdentificationType Amazon.TranscribeStreaming.ContentIdentificationType

Gets and sets the property ContentIdentificationType.

Labels all personally identifiable information (PII) identified in your transcript.

Content identification is performed at the segment level; PII specified in PiiEntityTypes is flagged upon complete transcription of an audio segment. If you don't include PiiEntityTypes in your request, all PII is identified.

You can’t set ContentIdentificationType and ContentRedactionType in the same request. If you set both, your request returns a BadRequestException.

For more information, see Redacting or identifying personally identifiable information.

Public Property ContentRedactionType Amazon.TranscribeStreaming.ContentRedactionType

Gets and sets the property ContentRedactionType.

Redacts all personally identifiable information (PII) identified in your transcript.

Content redaction is performed at the segment level; PII specified in PiiEntityTypes is redacted upon complete transcription of an audio segment. If you don't include PiiEntityTypes in your request, all PII is redacted.

You can’t set ContentRedactionType and ContentIdentificationType in the same request. If you set both, your request returns a BadRequestException.

For more information, see Redacting or identifying personally identifiable information.

Public Property EnableChannelIdentification System.Nullable<System.Boolean>

Gets and sets the property EnableChannelIdentification.

Enables channel identification in multi-channel audio.

Channel identification transcribes the audio on each channel independently, then appends the output for each channel into one transcript.

If you have multi-channel audio and do not enable channel identification, your audio is transcribed in a continuous manner and your transcript is not separated by channel.

If you include EnableChannelIdentification in your request, you must also include NumberOfChannels.

For more information, see Transcribing multi-channel audio.

Public Property EnablePartialResultsStabilization System.Nullable<System.Boolean>

Gets and sets the property EnablePartialResultsStabilization.

Enables partial result stabilization for your transcription. Partial result stabilization can reduce latency in your output, but may impact accuracy. For more information, see Partial-result stabilization.

Public Property IdentifyLanguage System.Nullable<System.Boolean>

Gets and sets the property IdentifyLanguage.

Enables automatic language identification for your transcription.

If you include IdentifyLanguage, you must include a list of language codes, using LanguageOptions, that you think may be present in your audio stream.

You can also include a preferred language using PreferredLanguage. Adding a preferred language can help Amazon Transcribe identify the language faster than if you omit this parameter.

If you have multi-channel audio that contains different languages on each channel, and you've enabled channel identification, automatic language identification identifies the dominant language on each audio channel.

Note that you must include either LanguageCode or IdentifyLanguage or IdentifyMultipleLanguages in your request. If you include more than one of these parameters, your transcription job fails.

Streaming language identification can't be combined with custom language models or redaction.

Public Property IdentifyMultipleLanguages System.Nullable<System.Boolean>

Gets and sets the property IdentifyMultipleLanguages.

Enables automatic multi-language identification in your transcription job request. Use this parameter if your stream contains more than one language. If your stream contains only one language, use IdentifyLanguage instead.

If you include IdentifyMultipleLanguages, you must include a list of language codes, using LanguageOptions, that you think may be present in your stream.

If you want to apply a custom vocabulary or a custom vocabulary filter to your automatic multiple language identification request, include VocabularyNames or VocabularyFilterNames.

Note that you must include one of LanguageCode, IdentifyLanguage, or IdentifyMultipleLanguages in your request. If you include more than one of these parameters, your transcription job fails.

Public Property LanguageCode Amazon.TranscribeStreaming.LanguageCode

Gets and sets the property LanguageCode.

Specify the language code that represents the language spoken in your audio.

If you're unsure of the language spoken in your audio, consider using IdentifyLanguage to enable automatic language identification.

For a list of languages supported with Amazon Transcribe streaming, refer to the Supported languages table.

Public Property LanguageModelName System.String

Gets and sets the property LanguageModelName.

Specify the name of the custom language model that you want to use when processing your transcription. Note that language model names are case sensitive.

The language of the specified language model must match the language code you specify in your transcription request. If the languages don't match, the custom language model isn't applied. There are no errors or warnings associated with a language mismatch.

For more information, see Custom language models.

Public Property LanguageOptions System.String

Gets and sets the property LanguageOptions.

Specify two or more language codes that represent the languages you think may be present in your media; including more than five is not recommended.

Including language options can improve the accuracy of language identification.

If you include LanguageOptions in your request, you must also include IdentifyLanguage or IdentifyMultipleLanguages.

For a list of languages supported with Amazon Transcribe streaming, refer to the Supported languages table.

You can only include one language dialect per language per stream. For example, you cannot include en-US and en-AU in the same request.

Public Property MediaEncoding Amazon.TranscribeStreaming.MediaEncoding

Gets and sets the property MediaEncoding.

Specify the encoding of your input audio. Supported formats are:

  • FLAC

  • OPUS-encoded audio in an Ogg container

  • PCM (only signed 16-bit little-endian audio formats, which does not include WAV)

For more information, see Media formats.

Public Property MediaSampleRateHertz System.Nullable<System.Int32>

Gets and sets the property MediaSampleRateHertz.

The sample rate of the input audio (in hertz). Low-quality audio, such as telephone audio, is typically around 8,000 Hz. High-quality audio typically ranges from 16,000 Hz to 48,000 Hz. Note that the sample rate you specify must match that of your audio.

Public Property NumberOfChannels System.Nullable<System.Int32>

Gets and sets the property NumberOfChannels.

Specify the number of channels in your audio stream. This value must be 2, as only two channels are supported. If your audio doesn't contain multiple channels, do not include this parameter in your request.

If you include NumberOfChannels in your request, you must also include EnableChannelIdentification.

Public Property PartialResultsStability Amazon.TranscribeStreaming.PartialResultsStability

Gets and sets the property PartialResultsStability.

Specify the level of stability to use when you enable partial results stabilization (EnablePartialResultsStabilization).

Low stability provides the highest accuracy. High stability transcribes faster, but with slightly lower accuracy.

For more information, see Partial-result stabilization.

Public Property PiiEntityTypes System.String

Gets and sets the property PiiEntityTypes.

Specify which types of personally identifiable information (PII) you want to redact in your transcript. You can include as many types as you'd like, or you can select ALL.

Values must be comma-separated and can include: ADDRESS, BANK_ACCOUNT_NUMBER, BANK_ROUTING, CREDIT_DEBIT_CVV, CREDIT_DEBIT_EXPIRY, CREDIT_DEBIT_NUMBER, EMAIL, NAME, PHONE, PIN, SSN, or ALL.

Note that if you include PiiEntityTypes in your request, you must also include ContentIdentificationType or ContentRedactionType.

If you include ContentRedactionType or ContentIdentificationType in your request, but do not include PiiEntityTypes, all PII is redacted or identified.

Public Property PreferredLanguage Amazon.TranscribeStreaming.LanguageCode

Gets and sets the property PreferredLanguage.

Specify a preferred language from the subset of languages codes you specified in LanguageOptions.

You can only use this parameter if you've included IdentifyLanguage and LanguageOptions in your request.

Public Property SessionId System.String

Gets and sets the property SessionId.

Specify a name for your transcription session. If you don't include this parameter in your request, Amazon Transcribe generates an ID and returns it in the response.

Public Property ShowSpeakerLabel System.Nullable<System.Boolean>

Gets and sets the property ShowSpeakerLabel.

Enables speaker partitioning (diarization) in your transcription output. Speaker partitioning labels the speech from individual speakers in your media file.

For more information, see Partitioning speakers (diarization).

Public Property VocabularyFilterMethod Amazon.TranscribeStreaming.VocabularyFilterMethod

Gets and sets the property VocabularyFilterMethod.

Specify how you want your vocabulary filter applied to your transcript.

To replace words with ***, choose mask.

To delete words, choose remove.

To flag words without changing them, choose tag.

Public Property VocabularyFilterName System.String

Gets and sets the property VocabularyFilterName.

Specify the name of the custom vocabulary filter that you want to use when processing your transcription. Note that vocabulary filter names are case sensitive.

If the language of the specified custom vocabulary filter doesn't match the language identified in your media, the vocabulary filter is not applied to your transcription.

This parameter is not intended for use with the IdentifyLanguage parameter. If you're including IdentifyLanguage in your request and want to use one or more vocabulary filters with your transcription, use the VocabularyFilterNames parameter instead.

For more information, see Using vocabulary filtering with unwanted words.

Public Property VocabularyFilterNames System.String

Gets and sets the property VocabularyFilterNames.

Specify the names of the custom vocabulary filters that you want to use when processing your transcription. Note that vocabulary filter names are case sensitive.

If none of the languages of the specified custom vocabulary filters match the language identified in your media, your job fails.

This parameter is only intended for use with the IdentifyLanguage parameter. If you're not including IdentifyLanguage in your request and want to use a custom vocabulary filter with your transcription, use the VocabularyFilterName parameter instead.

For more information, see Using vocabulary filtering with unwanted words.

Public Property VocabularyName System.String

Gets and sets the property VocabularyName.

Specify the name of the custom vocabulary that you want to use when processing your transcription. Note that vocabulary names are case sensitive.

If the language of the specified custom vocabulary doesn't match the language identified in your media, the custom vocabulary is not applied to your transcription.

This parameter is not intended for use with the IdentifyLanguage parameter. If you're including IdentifyLanguage in your request and want to use one or more custom vocabularies with your transcription, use the VocabularyNames parameter instead.

For more information, see Custom vocabularies.

Public Property VocabularyNames System.String

Gets and sets the property VocabularyNames.

Specify the names of the custom vocabularies that you want to use when processing your transcription. Note that vocabulary names are case sensitive.

If none of the languages of the specified custom vocabularies match the language identified in your media, your job fails.

This parameter is only intended for use with the IdentifyLanguage parameter. If you're not including IdentifyLanguage in your request and want to use a custom vocabulary with your transcription, use the VocabularyName parameter instead.

For more information, see Custom vocabularies.

Version Information

.NET:
Supported in: 8.0 and newer, Core 3.1

.NET Standard:
Supported in: 2.0

.NET Framework:
Supported in: 4.7.2 and newer