base64

false (default), true

Specifies that the input file is encoded in base 64.

billing

The value specified is the name or number of the billing account that a transcription request should be associated with.

lid

false (default), true, language_model

The lid parameter enables you to use the ASR engine's Language Identification (LID) module to identify the language spoken in the input audio and automatically use an appropriate language model. To force the use of an an alternate model with a different "domain" name, specify it using lid =language_model.

Refer to lid for additional parameters and information.

json

string

The json parameter is a licensed optional feature.